src/video/SDL_blit_N.c

   1 /*
   2     SDL - Simple DirectMedia Layer
   3     Copyright (C) 1997-2009 Sam Lantinga
   4
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Lesser General Public
   7     License as published by the Free Software Foundation; either
   8     version 2.1 of the License, or (at your option) any later version.
   9
  10     This library is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13     Lesser General Public License for more details.
  14
  15     You should have received a copy of the GNU Lesser General Public
  16     License along with this library; if not, write to the Free Software
  17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18
  19     Sam Lantinga
  20     slouken@libsdl.org
  21 */
  22 #include "SDL_config.h"
  23
  24 #include "SDL_video.h"
  25 #include "SDL_endian.h"
  26 #include "SDL_cpuinfo.h"
  27 #include "SDL_blit.h"
  28
  29 /* Functions to blit from N-bit surfaces to other surfaces */
  30
  31 #if SDL_ALTIVEC_BLITTERS
  32 #if __MWERKS__
  33 #pragma altivec_model on
  34 #endif
  35 #ifdef HAVE_ALTIVEC_H
  36 #include <altivec.h>
  37 #endif
  38 #define assert(X)
  39 #ifdef __MACOSX__
  40 #include <sys/sysctl.h>
  41 static size_t GetL3CacheSize( void )
  42 {
  43     const char key[] = "hw.l3cachesize";
  44     u_int64_t result = 0;
  45     size_t typeSize = sizeof( result );
  46
  47
  48     int err = sysctlbyname( key, &result, &typeSize, NULL, 0 );
  49     if( 0 != err ) return 0;
  50
  51     return result;
  52 }
  53 #else
  54 static size_t GetL3CacheSize( void )
  55 {
  56     /* XXX: Just guess G4 */
  57     return 2097152;
  58 }
  59 #endif /* __MACOSX__ */
  60
  61 #if (defined(__MACOSX__) && (__GNUC__ < 4))
  62     #define VECUINT8_LITERAL(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
  63         (vector unsigned char) ( a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p )
  64     #define VECUINT16_LITERAL(a,b,c,d,e,f,g,h) \
  65         (vector unsigned short) ( a,b,c,d,e,f,g,h )
  66 #else
  67     #define VECUINT8_LITERAL(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
  68         (vector unsigned char) { a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p }
  69     #define VECUINT16_LITERAL(a,b,c,d,e,f,g,h) \
  70         (vector unsigned short) { a,b,c,d,e,f,g,h }
  71 #endif
  72
  73 #define UNALIGNED_PTR(x) (((size_t) x) & 0x0000000F)
  74 #define VSWIZZLE32(a,b,c,d) (vector unsigned char) \
  75                                ( 0x00+a, 0x00+b, 0x00+c, 0x00+d, \
  76                                  0x04+a, 0x04+b, 0x04+c, 0x04+d, \
  77                                  0x08+a, 0x08+b, 0x08+c, 0x08+d, \
  78                                  0x0C+a, 0x0C+b, 0x0C+c, 0x0C+d )
  79
  80 #define MAKE8888(dstfmt, r, g, b, a)  \
  81     ( ((r<<dstfmt->Rshift)&dstfmt->Rmask) | \
  82       ((g<<dstfmt->Gshift)&dstfmt->Gmask) | \
  83       ((b<<dstfmt->Bshift)&dstfmt->Bmask) | \
  84       ((a<<dstfmt->Ashift)&dstfmt->Amask) )
  85
  86 /*
  87  * Data Stream Touch...Altivec cache prefetching.
  88  *
  89  *  Don't use this on a G5...however, the speed boost is very significant
  90  *   on a G4.
  91  */
  92 #define DST_CHAN_SRC 1
  93 #define DST_CHAN_DEST 2
  94
  95 /* macro to set DST control word value... */
  96 #define DST_CTRL(size, count, stride) \
  97     (((size) << 24) | ((count) << 16) | (stride))
  98
  99 #define VEC_ALIGNER(src) ((UNALIGNED_PTR(src)) \
 100     ? vec_lvsl(0, src) \
 101     : vec_add(vec_lvsl(8, src), vec_splat_u8(8)))
 102
 103 /* Calculate the permute vector used for 32->32 swizzling */
 104 static vector unsigned char calc_swizzle32(const SDL_PixelFormat *srcfmt,
 105                                   const SDL_PixelFormat *dstfmt)
 106 {
 107     /*
 108     * We have to assume that the bits that aren't used by other
 109      *  colors is alpha, and it's one complete byte, since some formats
 110      *  leave alpha with a zero mask, but we should still swizzle the bits.
 111      */
 112     /* ARGB */
 113     const static struct SDL_PixelFormat default_pixel_format = {
 114         NULL, 0, 0,
 115         0, 0, 0, 0,
 116         16, 8, 0, 24,
 117         0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000,
 118         0, 0};
 119     if (!srcfmt) {
 120         srcfmt = &default_pixel_format;
 121     }
 122     if (!dstfmt) {
 123         dstfmt = &default_pixel_format;
 124     }
 125     const vector unsigned char plus = VECUINT8_LITERAL(
 126                                       0x00, 0x00, 0x00, 0x00,
 127                                       0x04, 0x04, 0x04, 0x04,
 128                                       0x08, 0x08, 0x08, 0x08,
 129                                       0x0C, 0x0C, 0x0C, 0x0C );
 130     vector unsigned char vswiz;
 131     vector unsigned int srcvec;
 132 #define RESHIFT(X) (3 - ((X) >> 3))
 133     Uint32 rmask = RESHIFT(srcfmt->Rshift) << (dstfmt->Rshift);
 134     Uint32 gmask = RESHIFT(srcfmt->Gshift) << (dstfmt->Gshift);
 135     Uint32 bmask = RESHIFT(srcfmt->Bshift) << (dstfmt->Bshift);
 136     Uint32 amask;
 137     /* Use zero for alpha if either surface doesn't have alpha */
 138     if (dstfmt->Amask) {
 139         amask = ((srcfmt->Amask) ? RESHIFT(srcfmt->Ashift) : 0x10) << (dstfmt->Ashift);
 140     } else {
 141         amask = 0x10101010 & ((dstfmt->Rmask | dstfmt->Gmask | dstfmt->Bmask) ^ 0xFFFFFFFF);
 142     }
 143 #undef RESHIFT
 144     ((unsigned int *)(char*)&srcvec)[0] = (rmask | gmask | bmask | amask);
 145     vswiz = vec_add(plus, (vector unsigned char)vec_splat(srcvec, 0));
 146     return(vswiz);
 147 }
 148
 149 static void Blit_RGB888_RGB565(SDL_BlitInfo *info);
 150 static void Blit_RGB888_RGB565Altivec(SDL_BlitInfo *info) {
 151     int height = info->d_height;
 152     Uint8 *src = (Uint8 *) info->s_pixels;
 153     int srcskip = info->s_skip;
 154     Uint8 *dst = (Uint8 *) info->d_pixels;
 155     int dstskip = info->d_skip;
 156     SDL_PixelFormat *srcfmt = info->src;
 157     vector unsigned char valpha = vec_splat_u8(0);
 158     vector unsigned char vpermute = calc_swizzle32(srcfmt, NULL);
 159     vector unsigned char vgmerge = VECUINT8_LITERAL(
 160         0x00, 0x02, 0x00, 0x06,
 161         0x00, 0x0a, 0x00, 0x0e,
 162         0x00, 0x12, 0x00, 0x16,
 163         0x00, 0x1a, 0x00, 0x1e);
 164     vector unsigned short v1 = vec_splat_u16(1);
 165     vector unsigned short v3 = vec_splat_u16(3);
 166     vector unsigned short v3f = VECUINT16_LITERAL(
 167         0x003f, 0x003f, 0x003f, 0x003f,
 168         0x003f, 0x003f, 0x003f, 0x003f);
 169     vector unsigned short vfc = VECUINT16_LITERAL(
 170         0x00fc, 0x00fc, 0x00fc, 0x00fc,
 171         0x00fc, 0x00fc, 0x00fc, 0x00fc);
 172     vector unsigned short vf800 = (vector unsigned short)vec_splat_u8(-7);
 173     vf800 = vec_sl(vf800, vec_splat_u16(8));
 174
 175     while (height--) {
 176         vector unsigned char valigner;
 177         vector unsigned char voverflow;
 178         vector unsigned char vsrc;
 179
 180         int width = info->d_width;
 181         int extrawidth;
 182
 183         /* do scalar until we can align... */
 184 #define ONE_PIXEL_BLEND(condition, widthvar) \
 185         while (condition) { \
 186             Uint32 Pixel; \
 187             unsigned sR, sG, sB, sA; \
 188             DISEMBLE_RGBA((Uint8 *)src, 4, srcfmt, Pixel, \
 189                           sR, sG, sB, sA); \
 190             *(Uint16 *)(dst) = (((sR << 8) & 0x0000F800) | \
 191                                 ((sG << 3) & 0x000007E0) | \
 192                                 ((sB >> 3) & 0x0000001F)); \
 193             dst += 2; \
 194             src += 4; \
 195             widthvar--; \
 196         }
 197
 198         ONE_PIXEL_BLEND(((UNALIGNED_PTR(dst)) && (width)), width);
 199
 200         /* After all that work, here's the vector part! */
 201         extrawidth = (width % 8);  /* trailing unaligned stores */
 202         width -= extrawidth;
 203         vsrc = vec_ld(0, src);
 204         valigner = VEC_ALIGNER(src);
 205
 206         while (width) {
 207             vector unsigned short vpixel, vrpixel, vgpixel, vbpixel;
 208             vector unsigned int vsrc1, vsrc2;
 209             vector unsigned char vdst;
 210
 211             voverflow = vec_ld(15, src);
 212             vsrc = vec_perm(vsrc, voverflow, valigner);
 213             vsrc1 = (vector unsigned int)vec_perm(vsrc, valpha, vpermute);
 214             src += 16;
 215             vsrc = voverflow;
 216             voverflow = vec_ld(15, src);
 217             vsrc = vec_perm(vsrc, voverflow, valigner);
 218             vsrc2 = (vector unsigned int)vec_perm(vsrc, valpha, vpermute);
 219             /* 1555 */
 220             vpixel = (vector unsigned short)vec_packpx(vsrc1, vsrc2);
 221             vgpixel = (vector unsigned short)vec_perm(vsrc1, vsrc2, vgmerge);
 222             vgpixel = vec_and(vgpixel, vfc);
 223             vgpixel = vec_sl(vgpixel, v3);
 224             vrpixel = vec_sl(vpixel, v1);
 225             vrpixel = vec_and(vrpixel, vf800);
 226             vbpixel = vec_and(vpixel, v3f);
 227             vdst = vec_or((vector unsigned char)vrpixel, (vector unsigned char)vgpixel);
 228             /* 565 */
 229             vdst = vec_or(vdst, (vector unsigned char)vbpixel);
 230             vec_st(vdst, 0, dst);
 231
 232             width -= 8;
 233             src += 16;
 234             dst += 16;
 235             vsrc = voverflow;
 236         }
 237
 238         assert(width == 0);
 239
 240         /* do scalar until we can align... */
 241         ONE_PIXEL_BLEND((extrawidth), extrawidth);
 242 #undef ONE_PIXEL_BLEND
 243
 244         src += srcskip;  /* move to next row, accounting for pitch. */
 245         dst += dstskip;
 246     }
 247
 248
 249 }
 250
 251 static void Blit_RGB565_32Altivec(SDL_BlitInfo *info) {
 252     int height = info->d_height;
 253     Uint8 *src = (Uint8 *) info->s_pixels;
 254     int srcskip = info->s_skip;
 255     Uint8 *dst = (Uint8 *) info->d_pixels;
 256     int dstskip = info->d_skip;
 257     SDL_PixelFormat *srcfmt = info->src;
 258     SDL_PixelFormat *dstfmt = info->dst;
 259     unsigned alpha;
 260     vector unsigned char valpha;
 261     vector unsigned char vpermute;
 262     vector unsigned short vf800;
 263     vector unsigned int v8 = vec_splat_u32(8);
 264     vector unsigned int v16 = vec_add(v8, v8);
 265     vector unsigned short v2 = vec_splat_u16(2);
 266     vector unsigned short v3 = vec_splat_u16(3);
 267     /*
 268         0x10 - 0x1f is the alpha
 269         0x00 - 0x0e evens are the red
 270         0x01 - 0x0f odds are zero
 271     */
 272     vector unsigned char vredalpha1 = VECUINT8_LITERAL(
 273         0x10, 0x00, 0x01, 0x01,
 274         0x10, 0x02, 0x01, 0x01,
 275         0x10, 0x04, 0x01, 0x01,
 276         0x10, 0x06, 0x01, 0x01
 277     );
 278     vector unsigned char vredalpha2 = (vector unsigned char) (
 279         vec_add((vector unsigned int)vredalpha1, vec_sl(v8, v16))
 280     );
 281     /*
 282         0x00 - 0x0f is ARxx ARxx ARxx ARxx
 283         0x11 - 0x0f odds are blue
 284     */
 285     vector unsigned char vblue1 = VECUINT8_LITERAL(
 286         0x00, 0x01, 0x02, 0x11,
 287         0x04, 0x05, 0x06, 0x13,
 288         0x08, 0x09, 0x0a, 0x15,
 289         0x0c, 0x0d, 0x0e, 0x17
 290     );
 291     vector unsigned char vblue2 = (vector unsigned char)(
 292         vec_add((vector unsigned int)vblue1, v8)
 293     );
 294     /*
 295         0x00 - 0x0f is ARxB ARxB ARxB ARxB
 296         0x10 - 0x0e evens are green
 297     */
 298     vector unsigned char vgreen1 = VECUINT8_LITERAL(
 299         0x00, 0x01, 0x10, 0x03,
 300         0x04, 0x05, 0x12, 0x07,
 301         0x08, 0x09, 0x14, 0x0b,
 302         0x0c, 0x0d, 0x16, 0x0f
 303     );
 304     vector unsigned char vgreen2 = (vector unsigned char)(
 305         vec_add((vector unsigned int)vgreen1, vec_sl(v8, v8))
 306     );
 307
 308
 309     assert(srcfmt->BytesPerPixel == 2);
 310     assert(dstfmt->BytesPerPixel == 4);
 311
 312     vf800 = (vector unsigned short)vec_splat_u8(-7);
 313     vf800 = vec_sl(vf800, vec_splat_u16(8));
 314
 315     if (dstfmt->Amask && srcfmt->alpha) {
 316         ((unsigned char *)&valpha)[0] = alpha = srcfmt->alpha;
 317         valpha = vec_splat(valpha, 0);
 318     } else {
 319         alpha = 0;
 320         valpha = vec_splat_u8(0);
 321     }
 322
 323     vpermute = calc_swizzle32(NULL, dstfmt);
 324     while (height--) {
 325         vector unsigned char valigner;
 326         vector unsigned char voverflow;
 327         vector unsigned char vsrc;
 328
 329         int width = info->d_width;
 330         int extrawidth;
 331
 332         /* do scalar until we can align... */
 333 #define ONE_PIXEL_BLEND(condition, widthvar) \
 334         while (condition) { \
 335             unsigned sR, sG, sB; \
 336             unsigned short Pixel = *((unsigned short *)src); \
 337             sR = (Pixel >> 8) & 0xf8; \
 338             sG = (Pixel >> 3) & 0xfc; \
 339             sB = (Pixel << 3) & 0xf8; \
 340             ASSEMBLE_RGBA(dst, 4, dstfmt, sR, sG, sB, alpha); \
 341             src += 2; \
 342             dst += 4; \
 343             widthvar--; \
 344         }
 345         ONE_PIXEL_BLEND(((UNALIGNED_PTR(dst)) && (width)), width);
 346
 347         /* After all that work, here's the vector part! */
 348         extrawidth = (width % 8);  /* trailing unaligned stores */
 349         width -= extrawidth;
 350         vsrc = vec_ld(0, src);
 351         valigner = VEC_ALIGNER(src);
 352
 353         while (width) {
 354             vector unsigned short vR, vG, vB;
 355             vector unsigned char vdst1, vdst2;
 356
 357             voverflow = vec_ld(15, src);
 358             vsrc = vec_perm(vsrc, voverflow, valigner);
 359
 360             vR = vec_and((vector unsigned short)vsrc, vf800);
 361             vB = vec_sl((vector unsigned short)vsrc, v3);
 362             vG = vec_sl(vB, v2);
 363
 364             vdst1 = (vector unsigned char)vec_perm((vector unsigned char)vR, valpha, vredalpha1);
 365             vdst1 = vec_perm(vdst1, (vector unsigned char)vB, vblue1);
 366             vdst1 = vec_perm(vdst1, (vector unsigned char)vG, vgreen1);
 367             vdst1 = vec_perm(vdst1, valpha, vpermute);
 368             vec_st(vdst1, 0, dst);
 369
 370             vdst2 = (vector unsigned char)vec_perm((vector unsigned char)vR, valpha, vredalpha2);
 371             vdst2 = vec_perm(vdst2, (vector unsigned char)vB, vblue2);
 372             vdst2 = vec_perm(vdst2, (vector unsigned char)vG, vgreen2);
 373             vdst2 = vec_perm(vdst2, valpha, vpermute);
 374             vec_st(vdst2, 16, dst);
 375
 376             width -= 8;
 377             dst += 32;
 378             src += 16;
 379             vsrc = voverflow;
 380         }
 381
 382         assert(width == 0);
 383
 384
 385         /* do scalar until we can align... */
 386         ONE_PIXEL_BLEND((extrawidth), extrawidth);
 387 #undef ONE_PIXEL_BLEND
 388
 389         src += srcskip;  /* move to next row, accounting for pitch. */
 390         dst += dstskip;
 391     }
 392
 393 }
 394
 395
 396 static void Blit_RGB555_32Altivec(SDL_BlitInfo *info) {
 397     int height = info->d_height;
 398     Uint8 *src = (Uint8 *) info->s_pixels;
 399     int srcskip = info->s_skip;
 400     Uint8 *dst = (Uint8 *) info->d_pixels;
 401     int dstskip = info->d_skip;
 402     SDL_PixelFormat *srcfmt = info->src;
 403     SDL_PixelFormat *dstfmt = info->dst;
 404     unsigned alpha;
 405     vector unsigned char valpha;
 406     vector unsigned char vpermute;
 407     vector unsigned short vf800;
 408     vector unsigned int v8 = vec_splat_u32(8);
 409     vector unsigned int v16 = vec_add(v8, v8);
 410     vector unsigned short v1 = vec_splat_u16(1);
 411     vector unsigned short v3 = vec_splat_u16(3);
 412     /*
 413         0x10 - 0x1f is the alpha
 414         0x00 - 0x0e evens are the red
 415         0x01 - 0x0f odds are zero
 416     */
 417     vector unsigned char vredalpha1 = VECUINT8_LITERAL(
 418         0x10, 0x00, 0x01, 0x01,
 419         0x10, 0x02, 0x01, 0x01,
 420         0x10, 0x04, 0x01, 0x01,
 421         0x10, 0x06, 0x01, 0x01
 422     );
 423     vector unsigned char vredalpha2 = (vector unsigned char)(
 424         vec_add((vector unsigned int)vredalpha1, vec_sl(v8, v16))
 425     );
 426     /*
 427         0x00 - 0x0f is ARxx ARxx ARxx ARxx
 428         0x11 - 0x0f odds are blue
 429     */
 430     vector unsigned char vblue1 = VECUINT8_LITERAL(
 431         0x00, 0x01, 0x02, 0x11,
 432         0x04, 0x05, 0x06, 0x13,
 433         0x08, 0x09, 0x0a, 0x15,
 434         0x0c, 0x0d, 0x0e, 0x17
 435     );
 436     vector unsigned char vblue2 = (vector unsigned char)(
 437         vec_add((vector unsigned int)vblue1, v8)
 438     );
 439     /*
 440         0x00 - 0x0f is ARxB ARxB ARxB ARxB
 441         0x10 - 0x0e evens are green
 442     */
 443     vector unsigned char vgreen1 = VECUINT8_LITERAL(
 444         0x00, 0x01, 0x10, 0x03,
 445         0x04, 0x05, 0x12, 0x07,
 446         0x08, 0x09, 0x14, 0x0b,
 447         0x0c, 0x0d, 0x16, 0x0f
 448     );
 449     vector unsigned char vgreen2 = (vector unsigned char)(
 450         vec_add((vector unsigned int)vgreen1, vec_sl(v8, v8))
 451     );
 452
 453
 454     assert(srcfmt->BytesPerPixel == 2);
 455     assert(dstfmt->BytesPerPixel == 4);
 456
 457     vf800 = (vector unsigned short)vec_splat_u8(-7);
 458     vf800 = vec_sl(vf800, vec_splat_u16(8));
 459
 460     if (dstfmt->Amask && srcfmt->alpha) {
 461         ((unsigned char *)&valpha)[0] = alpha = srcfmt->alpha;
 462         valpha = vec_splat(valpha, 0);
 463     } else {
 464         alpha = 0;
 465         valpha = vec_splat_u8(0);
 466     }
 467
 468     vpermute = calc_swizzle32(NULL, dstfmt);
 469     while (height--) {
 470         vector unsigned char valigner;
 471         vector unsigned char voverflow;
 472         vector unsigned char vsrc;
 473
 474         int width = info->d_width;
 475         int extrawidth;
 476
 477         /* do scalar until we can align... */
 478 #define ONE_PIXEL_BLEND(condition, widthvar) \
 479         while (condition) { \
 480             unsigned sR, sG, sB; \
 481             unsigned short Pixel = *((unsigned short *)src); \
 482             sR = (Pixel >> 7) & 0xf8; \
 483             sG = (Pixel >> 2) & 0xf8; \
 484             sB = (Pixel << 3) & 0xf8; \
 485             ASSEMBLE_RGBA(dst, 4, dstfmt, sR, sG, sB, alpha); \
 486             src += 2; \
 487             dst += 4; \
 488             widthvar--; \
 489         }
 490         ONE_PIXEL_BLEND(((UNALIGNED_PTR(dst)) && (width)), width);
 491
 492         /* After all that work, here's the vector part! */
 493         extrawidth = (width % 8);  /* trailing unaligned stores */
 494         width -= extrawidth;
 495         vsrc = vec_ld(0, src);
 496         valigner = VEC_ALIGNER(src);
 497
 498         while (width) {
 499             vector unsigned short vR, vG, vB;
 500             vector unsigned char vdst1, vdst2;
 501
 502             voverflow = vec_ld(15, src);
 503             vsrc = vec_perm(vsrc, voverflow, valigner);
 504
 505             vR = vec_and(vec_sl((vector unsigned short)vsrc,v1), vf800);
 506             vB = vec_sl((vector unsigned short)vsrc, v3);
 507             vG = vec_sl(vB, v3);
 508
 509             vdst1 = (vector unsigned char)vec_perm((vector unsigned char)vR, valpha, vredalpha1);
 510             vdst1 = vec_perm(vdst1, (vector unsigned char)vB, vblue1);
 511             vdst1 = vec_perm(vdst1, (vector unsigned char)vG, vgreen1);
 512             vdst1 = vec_perm(vdst1, valpha, vpermute);
 513             vec_st(vdst1, 0, dst);
 514
 515             vdst2 = (vector unsigned char)vec_perm((vector unsigned char)vR, valpha, vredalpha2);
 516             vdst2 = vec_perm(vdst2, (vector unsigned char)vB, vblue2);
 517             vdst2 = vec_perm(vdst2, (vector unsigned char)vG, vgreen2);
 518             vdst2 = vec_perm(vdst2, valpha, vpermute);
 519             vec_st(vdst2, 16, dst);
 520
 521             width -= 8;
 522             dst += 32;
 523             src += 16;
 524             vsrc = voverflow;
 525         }
 526
 527         assert(width == 0);
 528
 529
 530         /* do scalar until we can align... */
 531         ONE_PIXEL_BLEND((extrawidth), extrawidth);
 532 #undef ONE_PIXEL_BLEND
 533
 534         src += srcskip;  /* move to next row, accounting for pitch. */
 535         dst += dstskip;
 536     }
 537
 538 }
 539
 540 static void BlitNtoNKey(SDL_BlitInfo *info);
 541 static void BlitNtoNKeyCopyAlpha(SDL_BlitInfo *info);
 542 static void Blit32to32KeyAltivec(SDL_BlitInfo *info)
 543 {
 544     int height = info->d_height;
 545     Uint32 *srcp = (Uint32 *) info->s_pixels;
 546     int srcskip = info->s_skip;
 547     Uint32 *dstp = (Uint32 *) info->d_pixels;
 548     int dstskip = info->d_skip;
 549     SDL_PixelFormat *srcfmt = info->src;
 550     int srcbpp = srcfmt->BytesPerPixel;
 551     SDL_PixelFormat *dstfmt = info->dst;
 552     int dstbpp = dstfmt->BytesPerPixel;
 553     int copy_alpha = (srcfmt->Amask && dstfmt->Amask);
 554         unsigned alpha = dstfmt->Amask ? srcfmt->alpha : 0;
 555     Uint32 rgbmask = srcfmt->Rmask | srcfmt->Gmask | srcfmt->Bmask;
 556         Uint32 ckey = info->src->colorkey;
 557     vector unsigned int valpha;
 558     vector unsigned char vpermute;
 559     vector unsigned char vzero;
 560     vector unsigned int vckey;
 561     vector unsigned int vrgbmask;
 562     vpermute = calc_swizzle32(srcfmt, dstfmt);
 563     if (info->d_width < 16) {
 564         if(copy_alpha) {
 565             BlitNtoNKeyCopyAlpha(info);
 566         } else {
 567             BlitNtoNKey(info);
 568         }
 569         return;
 570     }
 571     vzero = vec_splat_u8(0);
 572     if (alpha) {
 573         ((unsigned char *)&valpha)[0] = (unsigned char)alpha;
 574         valpha = (vector unsigned int)vec_splat((vector unsigned char)valpha, 0);
 575     } else {
 576         valpha = (vector unsigned int)vzero;
 577     }
 578     ckey &= rgbmask;
 579     ((unsigned int *)(char*)&vckey)[0] = ckey;
 580     vckey = vec_splat(vckey, 0);
 581     ((unsigned int *)(char*)&vrgbmask)[0] = rgbmask;
 582     vrgbmask = vec_splat(vrgbmask, 0);
 583
 584     while (height--) {
 585 #define ONE_PIXEL_BLEND(condition, widthvar) \
 586         if (copy_alpha) { \
 587             while (condition) { \
 588                 Uint32 Pixel; \
 589                 unsigned sR, sG, sB, sA; \
 590                 DISEMBLE_RGBA((Uint8 *)srcp, srcbpp, srcfmt, Pixel, \
 591                           sR, sG, sB, sA); \
 592                 if ( (Pixel & rgbmask) != ckey ) { \
 593                       ASSEMBLE_RGBA((Uint8 *)dstp, dstbpp, dstfmt, \
 594                             sR, sG, sB, sA); \
 595                 } \
 596                 dstp = (Uint32 *) (((Uint8 *) dstp) + dstbpp); \
 597                 srcp = (Uint32 *) (((Uint8 *) srcp) + srcbpp); \
 598                 widthvar--; \
 599             } \
 600         } else { \
 601             while (condition) { \
 602                 Uint32 Pixel; \
 603                 unsigned sR, sG, sB; \
 604                 RETRIEVE_RGB_PIXEL((Uint8 *)srcp, srcbpp, Pixel); \
 605                 if ( Pixel != ckey ) { \
 606                     RGB_FROM_PIXEL(Pixel, srcfmt, sR, sG, sB); \
 607                     ASSEMBLE_RGBA((Uint8 *)dstp, dstbpp, dstfmt, \
 608                               sR, sG, sB, alpha); \
 609                 } \
 610                 dstp = (Uint32 *) (((Uint8 *)dstp) + dstbpp); \
 611                 srcp = (Uint32 *) (((Uint8 *)srcp) + srcbpp); \
 612                 widthvar--; \
 613             } \
 614         }
 615         int width = info->d_width;
 616         ONE_PIXEL_BLEND((UNALIGNED_PTR(dstp)) && (width), width);
 617         assert(width > 0);
 618         if (width > 0) {
 619             int extrawidth = (width % 4);
 620             vector unsigned char valigner = VEC_ALIGNER(srcp);
 621             vector unsigned int vs = vec_ld(0, srcp);
 622             width -= extrawidth;
 623             assert(width >= 4);
 624             while (width) {
 625                 vector unsigned char vsel;
 626                 vector unsigned int vd;
 627                 vector unsigned int voverflow = vec_ld(15, srcp);
 628                 /* load the source vec */
 629                 vs = vec_perm(vs, voverflow, valigner);
 630                 /* vsel is set for items that match the key */
 631                 vsel = (vector unsigned char)vec_and(vs, vrgbmask);
 632                 vsel = (vector unsigned char)vec_cmpeq(vs, vckey);
 633                 /* permute the src vec to the dest format */
 634                 vs = vec_perm(vs, valpha, vpermute);
 635                 /* load the destination vec */
 636                 vd = vec_ld(0, dstp);
 637                 /* select the source and dest into vs */
 638                 vd = (vector unsigned int)vec_sel((vector unsigned char)vs, (vector unsigned char)vd, vsel);
 639
 640                 vec_st(vd, 0, dstp);
 641                 srcp += 4;
 642                 width -= 4;
 643                 dstp += 4;
 644                 vs = voverflow;
 645             }
 646             ONE_PIXEL_BLEND((extrawidth), extrawidth);
 647 #undef ONE_PIXEL_BLEND
 648             srcp += srcskip >> 2;
 649             dstp += dstskip >> 2;
 650         }
 651     }
 652 }
 653
 654 /* Altivec code to swizzle one 32-bit surface to a different 32-bit format. */
 655 /* Use this on a G5 */
 656 static void ConvertAltivec32to32_noprefetch(SDL_BlitInfo *info)
 657 {
 658     int height = info->d_height;
 659     Uint32 *src = (Uint32 *) info->s_pixels;
 660     int srcskip = info->s_skip;
 661     Uint32 *dst = (Uint32 *) info->d_pixels;
 662     int dstskip = info->d_skip;
 663     SDL_PixelFormat *srcfmt = info->src;
 664     SDL_PixelFormat *dstfmt = info->dst;
 665     vector unsigned int vzero = vec_splat_u32(0);
 666     vector unsigned char vpermute = calc_swizzle32(srcfmt, dstfmt);
 667     if (dstfmt->Amask && !srcfmt->Amask) {
 668         if (srcfmt->alpha) {
 669             vector unsigned char valpha;
 670             ((unsigned char *)&valpha)[0] = srcfmt->alpha;
 671             vzero = (vector unsigned int)vec_splat(valpha, 0);
 672         }
 673     }
 674
 675     assert(srcfmt->BytesPerPixel == 4);
 676     assert(dstfmt->BytesPerPixel == 4);
 677
 678     while (height--) {
 679         vector unsigned char valigner;
 680         vector unsigned int vbits;
 681         vector unsigned int voverflow;
 682         Uint32 bits;
 683         Uint8 r, g, b, a;
 684
 685         int width = info->d_width;
 686         int extrawidth;
 687
 688         /* do scalar until we can align... */
 689         while ((UNALIGNED_PTR(dst)) && (width)) {
 690             bits = *(src++);
 691             RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
 692             *(dst++) = MAKE8888(dstfmt, r, g, b, a);
 693             width--;
 694         }
 695
 696         /* After all that work, here's the vector part! */
 697         extrawidth = (width % 4);
 698         width -= extrawidth;
 699         valigner = VEC_ALIGNER(src);
 700         vbits = vec_ld(0, src);
 701
 702        while (width) {
 703             voverflow = vec_ld(15, src);
 704             src += 4;
 705             width -= 4;
 706             vbits = vec_perm(vbits, voverflow, valigner);  /* src is ready. */
 707             vbits = vec_perm(vbits, vzero, vpermute);  /* swizzle it. */
 708             vec_st(vbits, 0, dst);  /* store it back out. */
 709             dst += 4;
 710             vbits = voverflow;
 711         }
 712
 713         assert(width == 0);
 714
 715         /* cover pixels at the end of the row that didn't fit in 16 bytes. */
 716         while (extrawidth) {
 717             bits = *(src++);  /* max 7 pixels, don't bother with prefetch. */
 718             RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
 719             *(dst++) = MAKE8888(dstfmt, r, g, b, a);
 720             extrawidth--;
 721         }
 722
 723         src += srcskip >> 2;  /* move to next row, accounting for pitch. */
 724         dst += dstskip >> 2;
 725     }
 726
 727 }
 728
 729 /* Altivec code to swizzle one 32-bit surface to a different 32-bit format. */
 730 /* Use this on a G4 */
 731 static void ConvertAltivec32to32_prefetch(SDL_BlitInfo *info)
 732 {
 733     const int scalar_dst_lead = sizeof (Uint32) * 4;
 734     const int vector_dst_lead = sizeof (Uint32) * 16;
 735
 736     int height = info->d_height;
 737     Uint32 *src = (Uint32 *) info->s_pixels;
 738     int srcskip = info->s_skip;
 739     Uint32 *dst = (Uint32 *) info->d_pixels;
 740     int dstskip = info->d_skip;
 741     SDL_PixelFormat *srcfmt = info->src;
 742     SDL_PixelFormat *dstfmt = info->dst;
 743     vector unsigned int vzero = vec_splat_u32(0);
 744     vector unsigned char vpermute = calc_swizzle32(srcfmt, dstfmt);
 745     if (dstfmt->Amask && !srcfmt->Amask) {
 746         if (srcfmt->alpha) {
 747             vector unsigned char valpha;
 748             ((unsigned char *)&valpha)[0] = srcfmt->alpha;
 749             vzero = (vector unsigned int)vec_splat(valpha, 0);
 750         }
 751     }
 752
 753     assert(srcfmt->BytesPerPixel == 4);
 754     assert(dstfmt->BytesPerPixel == 4);
 755
 756     while (height--) {
 757         vector unsigned char valigner;
 758         vector unsigned int vbits;
 759         vector unsigned int voverflow;
 760         Uint32 bits;
 761         Uint8 r, g, b, a;
 762
 763         int width = info->d_width;
 764         int extrawidth;
 765
 766         /* do scalar until we can align... */
 767         while ((UNALIGNED_PTR(dst)) && (width)) {
 768             vec_dstt(src+scalar_dst_lead, DST_CTRL(2,32,1024), DST_CHAN_SRC);
 769             vec_dstst(dst+scalar_dst_lead, DST_CTRL(2,32,1024), DST_CHAN_DEST);
 770             bits = *(src++);
 771             RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
 772             *(dst++) = MAKE8888(dstfmt, r, g, b, a);
 773             width--;
 774         }
 775
 776         /* After all that work, here's the vector part! */
 777         extrawidth = (width % 4);
 778         width -= extrawidth;
 779         valigner = VEC_ALIGNER(src);
 780         vbits = vec_ld(0, src);
 781
 782         while (width) {
 783             vec_dstt(src+vector_dst_lead, DST_CTRL(2,32,1024), DST_CHAN_SRC);
 784             vec_dstst(dst+vector_dst_lead, DST_CTRL(2,32,1024), DST_CHAN_DEST);
 785             voverflow = vec_ld(15, src);
 786             src += 4;
 787             width -= 4;
 788             vbits = vec_perm(vbits, voverflow, valigner);  /* src is ready. */
 789             vbits = vec_perm(vbits, vzero, vpermute);  /* swizzle it. */
 790             vec_st(vbits, 0, dst);  /* store it back out. */
 791             dst += 4;
 792             vbits = voverflow;
 793         }
 794
 795         assert(width == 0);
 796
 797         /* cover pixels at the end of the row that didn't fit in 16 bytes. */
 798         while (extrawidth) {
 799             bits = *(src++);  /* max 7 pixels, don't bother with prefetch. */
 800             RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
 801             *(dst++) = MAKE8888(dstfmt, r, g, b, a);
 802             extrawidth--;
 803         }
 804
 805         src += srcskip >> 2;  /* move to next row, accounting for pitch. */
 806         dst += dstskip >> 2;
 807     }
 808
 809     vec_dss(DST_CHAN_SRC);
 810     vec_dss(DST_CHAN_DEST);
 811 }
 812
 813 static Uint32 GetBlitFeatures( void )
 814 {
 815     static Uint32 features = 0xffffffff;
 816     if (features == 0xffffffff) {
 817         /* Provide an override for testing .. */
 818         char *override = SDL_getenv("SDL_ALTIVEC_BLIT_FEATURES");
 819         if (override) {
 820             features = 0;
 821             SDL_sscanf(override, "%u", &features);
 822         } else {
 823             features = ( 0
 824                 /* Feature 1 is has-MMX */
 825                 | ((SDL_HasMMX()) ? 1 : 0)
 826                 /* Feature 2 is has-AltiVec */
 827                 | ((SDL_HasAltiVec()) ? 2 : 0)
 828                 /* Feature 4 is dont-use-prefetch */
 829                 /* !!!! FIXME: Check for G5 or later, not the cache size! Always prefetch on a G4. */
 830                 | ((GetL3CacheSize() == 0) ? 4 : 0)
 831             );
 832         }
 833     }
 834     return features;
 835 }
 836 #if __MWERKS__
 837 #pragma altivec_model off
 838 #endif
 839 #else
 840 /* Feature 1 is has-MMX */
 841 #define GetBlitFeatures() ((Uint32)(SDL_HasMMX() ? 1 : 0))
 842 #endif
 843
 844 /* This is now endian dependent */
 845 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
 846 #define HI      1
 847 #define LO      0
 848 #else /* SDL_BYTEORDER == SDL_BIG_ENDIAN */
 849 #define HI      0
 850 #define LO      1
 851 #endif
 852
 853 #if SDL_HERMES_BLITTERS
 854
 855 /* Heheheh, we coerce Hermes into using SDL blit information */
 856 #define X86_ASSEMBLER
 857 #define HermesConverterInterface        SDL_BlitInfo
 858 #define HermesClearInterface            void
 859 #define STACKCALL
 860
 861 #include "../hermes/HeadMMX.h"
 862 #include "../hermes/HeadX86.h"
 863
 864 #else
 865
 866 /* Special optimized blit for RGB 8-8-8 --> RGB 3-3-2 */
 867 #define RGB888_RGB332(dst, src) { \
 868         dst = (Uint8)((((src)&0x00E00000)>>16)| \
 869                       (((src)&0x0000E000)>>11)| \
 870                       (((src)&0x000000C0)>>6)); \
 871 }
 872 static void Blit_RGB888_index8(SDL_BlitInfo *info)
 873 {
 874 #ifndef USE_DUFFS_LOOP
 875         int c;
 876 #endif
 877         int width, height;
 878         Uint32 *src;
 879         const Uint8 *map;
 880         Uint8 *dst;
 881         int srcskip, dstskip;
 882
 883         /* Set up some basic variables */
 884         width = info->d_width;
 885         height = info->d_height;
 886         src = (Uint32 *)info->s_pixels;
 887         srcskip = info->s_skip/4;
 888         dst = info->d_pixels;
 889         dstskip = info->d_skip;
 890         map = info->table;
 891
 892         if ( map == NULL ) {
 893                 while ( height-- ) {
 894 #ifdef USE_DUFFS_LOOP
 895                         DUFFS_LOOP(
 896                                 RGB888_RGB332(*dst++, *src);
 897                         , width);
 898 #else
 899                         for ( c=width/4; c; --c ) {
 900                                 /* Pack RGB into 8bit pixel */
 901                                 ++src;
 902                                 RGB888_RGB332(*dst++, *src);
 903                                 ++src;
 904                                 RGB888_RGB332(*dst++, *src);
 905                                 ++src;
 906                                 RGB888_RGB332(*dst++, *src);
 907                                 ++src;
 908                         }
 909                         switch ( width & 3 ) {
 910                                 case 3:
 911                                         RGB888_RGB332(*dst++, *src);
 912                                         ++src;
 913                                 case 2:
 914                                         RGB888_RGB332(*dst++, *src);
 915                                         ++src;
 916                                 case 1:
 917                                         RGB888_RGB332(*dst++, *src);
 918                                         ++src;
 919                         }
 920 #endif /* USE_DUFFS_LOOP */
 921                         src += srcskip;
 922                         dst += dstskip;
 923                 }
 924         } else {
 925                 int Pixel;
 926
 927                 while ( height-- ) {
 928 #ifdef USE_DUFFS_LOOP
 929                         DUFFS_LOOP(
 930                                 RGB888_RGB332(Pixel, *src);
 931                                 *dst++ = map[Pixel];
 932                                 ++src;
 933                         , width);
 934 #else
 935                         for ( c=width/4; c; --c ) {
 936                                 /* Pack RGB into 8bit pixel */
 937                                 RGB888_RGB332(Pixel, *src);
 938                                 *dst++ = map[Pixel];
 939                                 ++src;
 940                                 RGB888_RGB332(Pixel, *src);
 941                                 *dst++ = map[Pixel];
 942                                 ++src;
 943                                 RGB888_RGB332(Pixel, *src);
 944                                 *dst++ = map[Pixel];
 945                                 ++src;
 946                                 RGB888_RGB332(Pixel, *src);
 947                                 *dst++ = map[Pixel];
 948                                 ++src;
 949                         }
 950                         switch ( width & 3 ) {
 951                                 case 3:
 952                                         RGB888_RGB332(Pixel, *src);
 953                                         *dst++ = map[Pixel];
 954                                         ++src;
 955                                 case 2:
 956                                         RGB888_RGB332(Pixel, *src);
 957                                         *dst++ = map[Pixel];
 958                                         ++src;
 959                                 case 1:
 960                                         RGB888_RGB332(Pixel, *src);
 961                                         *dst++ = map[Pixel];
 962                                         ++src;
 963                         }
 964 #endif /* USE_DUFFS_LOOP */
 965                         src += srcskip;
 966                         dst += dstskip;
 967                 }
 968         }
 969 }
 970 /* Special optimized blit for RGB 8-8-8 --> RGB 5-5-5 */
 971 #define RGB888_RGB555(dst, src) { \
 972         *(Uint16 *)(dst) = (Uint16)((((*src)&0x00F80000)>>9)| \
 973                                     (((*src)&0x0000F800)>>6)| \
 974                                     (((*src)&0x000000F8)>>3)); \
 975 }
 976 #define RGB888_RGB555_TWO(dst, src) { \
 977         *(Uint32 *)(dst) = (((((src[HI])&0x00F80000)>>9)| \
 978                              (((src[HI])&0x0000F800)>>6)| \
 979                              (((src[HI])&0x000000F8)>>3))<<16)| \
 980                              (((src[LO])&0x00F80000)>>9)| \
 981                              (((src[LO])&0x0000F800)>>6)| \
 982                              (((src[LO])&0x000000F8)>>3); \
 983 }
 984 static void Blit_RGB888_RGB555(SDL_BlitInfo *info)
 985 {
 986 #ifndef USE_DUFFS_LOOP
 987         int c;
 988 #endif
 989         int width, height;
 990         Uint32 *src;
 991         Uint16 *dst;
 992         int srcskip, dstskip;
 993
 994         /* Set up some basic variables */
 995         width = info->d_width;
 996         height = info->d_height;
 997         src = (Uint32 *)info->s_pixels;
 998         srcskip = info->s_skip/4;
 999         dst = (Uint16 *)info->d_pixels;
1000         dstskip = info->d_skip/2;
1001
1002 #ifdef USE_DUFFS_LOOP
1003         while ( height-- ) {
1004                 DUFFS_LOOP(
1005                         RGB888_RGB555(dst, src);
1006                         ++src;
1007                         ++dst;
1008                 , width);
1009                 src += srcskip;
1010                 dst += dstskip;
1011         }
1012 #else
1013         /* Memory align at 4-byte boundary, if necessary */
1014         if ( (long)dst & 0x03 ) {
1015                 /* Don't do anything if width is 0 */
1016                 if ( width == 0 ) {
1017                         return;
1018                 }
1019                 --width;
1020
1021                 while ( height-- ) {
1022                         /* Perform copy alignment */
1023                         RGB888_RGB555(dst, src);
1024                         ++src;
1025                         ++dst;
1026
1027                         /* Copy in 4 pixel chunks */
1028                         for ( c=width/4; c; --c ) {
1029                                 RGB888_RGB555_TWO(dst, src);
1030                                 src += 2;
1031                                 dst += 2;
1032                                 RGB888_RGB555_TWO(dst, src);
1033                                 src += 2;
1034                                 dst += 2;
1035                         }
1036                         /* Get any leftovers */
1037                         switch (width & 3) {
1038                                 case 3:
1039                                         RGB888_RGB555(dst, src);
1040                                         ++src;
1041                                         ++dst;
1042                                 case 2:
1043                                         RGB888_RGB555_TWO(dst, src);
1044                                         src += 2;
1045                                         dst += 2;
1046                                         break;
1047                                 case 1:
1048                                         RGB888_RGB555(dst, src);
1049                                         ++src;
1050                                         ++dst;
1051                                         break;
1052                         }
1053                         src += srcskip;
1054                         dst += dstskip;
1055                 }
1056         } else {
1057                 while ( height-- ) {
1058                         /* Copy in 4 pixel chunks */
1059                         for ( c=width/4; c; --c ) {
1060                                 RGB888_RGB555_TWO(dst, src);
1061                                 src += 2;
1062                                 dst += 2;
1063                                 RGB888_RGB555_TWO(dst, src);
1064                                 src += 2;
1065                                 dst += 2;
1066                         }
1067                         /* Get any leftovers */
1068                         switch (width & 3) {
1069                                 case 3:
1070                                         RGB888_RGB555(dst, src);
1071                                         ++src;
1072                                         ++dst;
1073                                 case 2:
1074                                         RGB888_RGB555_TWO(dst, src);
1075                                         src += 2;
1076                                         dst += 2;
1077                                         break;
1078                                 case 1:
1079                                         RGB888_RGB555(dst, src);
1080                                         ++src;
1081                                         ++dst;
1082                                         break;
1083                         }
1084                         src += srcskip;
1085                         dst += dstskip;
1086                 }
1087         }
1088 #endif /* USE_DUFFS_LOOP */
1089 }
1090 /* Special optimized blit for RGB 8-8-8 --> RGB 5-6-5 */
1091 #define RGB888_RGB565(dst, src) { \
1092         *(Uint16 *)(dst) = (Uint16)((((*src)&0x00F80000)>>8)| \
1093                                     (((*src)&0x0000FC00)>>5)| \
1094                                     (((*src)&0x000000F8)>>3)); \
1095 }
1096 #define RGB888_RGB565_TWO(dst, src) { \
1097         *(Uint32 *)(dst) = (((((src[HI])&0x00F80000)>>8)| \
1098                              (((src[HI])&0x0000FC00)>>5)| \
1099                              (((src[HI])&0x000000F8)>>3))<<16)| \
1100                              (((src[LO])&0x00F80000)>>8)| \
1101                              (((src[LO])&0x0000FC00)>>5)| \
1102                              (((src[LO])&0x000000F8)>>3); \
1103 }
1104 static void Blit_RGB888_RGB565(SDL_BlitInfo *info)
1105 {
1106 #ifndef USE_DUFFS_LOOP
1107         int c;
1108 #endif
1109         int width, height;
1110         Uint32 *src;
1111         Uint16 *dst;
1112         int srcskip, dstskip;
1113
1114         /* Set up some basic variables */
1115         width = info->d_width;
1116         height = info->d_height;
1117         src = (Uint32 *)info->s_pixels;
1118         srcskip = info->s_skip/4;
1119         dst = (Uint16 *)info->d_pixels;
1120         dstskip = info->d_skip/2;
1121
1122 #ifdef USE_DUFFS_LOOP
1123         while ( height-- ) {
1124                 DUFFS_LOOP(
1125                         RGB888_RGB565(dst, src);
1126                         ++src;
1127                         ++dst;
1128                 , width);
1129                 src += srcskip;
1130                 dst += dstskip;
1131         }
1132 #else
1133         /* Memory align at 4-byte boundary, if necessary */
1134         if ( (long)dst & 0x03 ) {
1135                 /* Don't do anything if width is 0 */
1136                 if ( width == 0 ) {
1137                         return;
1138                 }
1139                 --width;
1140
1141                 while ( height-- ) {
1142                         /* Perform copy alignment */
1143                         RGB888_RGB565(dst, src);
1144                         ++src;
1145                         ++dst;
1146
1147                         /* Copy in 4 pixel chunks */
1148                         for ( c=width/4; c; --c ) {
1149                                 RGB888_RGB565_TWO(dst, src);
1150                                 src += 2;
1151                                 dst += 2;
1152                                 RGB888_RGB565_TWO(dst, src);
1153                                 src += 2;
1154                                 dst += 2;
1155                         }
1156                         /* Get any leftovers */
1157                         switch (width & 3) {
1158                                 case 3:
1159                                         RGB888_RGB565(dst, src);
1160                                         ++src;
1161                                         ++dst;
1162                                 case 2:
1163                                         RGB888_RGB565_TWO(dst, src);
1164                                         src += 2;
1165                                         dst += 2;
1166                                         break;
1167                                 case 1:
1168                                         RGB888_RGB565(dst, src);
1169                                         ++src;
1170                                         ++dst;
1171                                         break;
1172                         }
1173                         src += srcskip;
1174                         dst += dstskip;
1175                 }
1176         } else {
1177                 while ( height-- ) {
1178                         /* Copy in 4 pixel chunks */
1179                         for ( c=width/4; c; --c ) {
1180                                 RGB888_RGB565_TWO(dst, src);
1181                                 src += 2;
1182                                 dst += 2;
1183                                 RGB888_RGB565_TWO(dst, src);
1184                                 src += 2;
1185                                 dst += 2;
1186                         }
1187                         /* Get any leftovers */
1188                         switch (width & 3) {
1189                                 case 3:
1190                                         RGB888_RGB565(dst, src);
1191                                         ++src;
1192                                         ++dst;
1193                                 case 2:
1194                                         RGB888_RGB565_TWO(dst, src);
1195                                         src += 2;
1196                                         dst += 2;
1197                                         break;
1198                                 case 1:
1199                                         RGB888_RGB565(dst, src);
1200                                         ++src;
1201                                         ++dst;
1202                                         break;
1203                         }
1204                         src += srcskip;
1205                         dst += dstskip;
1206                 }
1207         }
1208 #endif /* USE_DUFFS_LOOP */
1209 }
1210
1211 #endif /* SDL_HERMES_BLITTERS */
1212
1213
1214 /* Special optimized blit for RGB 5-6-5 --> 32-bit RGB surfaces */
1215 #define RGB565_32(dst, src, map) (map[src[LO]*2] + map[src[HI]*2+1])
1216 static void Blit_RGB565_32(SDL_BlitInfo *info, const Uint32 *map)
1217 {
1218 #ifndef USE_DUFFS_LOOP
1219         int c;
1220 #endif
1221         int width, height;
1222         Uint8 *src;
1223         Uint32 *dst;
1224         int srcskip, dstskip;
1225
1226         /* Set up some basic variables */
1227         width = info->d_width;
1228         height = info->d_height;
1229         src = (Uint8 *)info->s_pixels;
1230         srcskip = info->s_skip;
1231         dst = (Uint32 *)info->d_pixels;
1232         dstskip = info->d_skip/4;
1233
1234 #ifdef USE_DUFFS_LOOP
1235         while ( height-- ) {
1236                 DUFFS_LOOP(
1237                 {
1238                         *dst++ = RGB565_32(dst, src, map);
1239                         src += 2;
1240                 },
1241                 width);
1242                 src += srcskip;
1243                 dst += dstskip;
1244         }
1245 #else
1246         while ( height-- ) {
1247                 /* Copy in 4 pixel chunks */
1248                 for ( c=width/4; c; --c ) {
1249                         *dst++ = RGB565_32(dst, src, map);
1250                         src += 2;
1251                         *dst++ = RGB565_32(dst, src, map);
1252                         src += 2;
1253                         *dst++ = RGB565_32(dst, src, map);
1254                         src += 2;
1255                         *dst++ = RGB565_32(dst, src, map);
1256                         src += 2;
1257                 }
1258                 /* Get any leftovers */
1259                 switch (width & 3) {
1260                         case 3:
1261                                 *dst++ = RGB565_32(dst, src, map);
1262                                 src += 2;
1263                         case 2:
1264                                 *dst++ = RGB565_32(dst, src, map);
1265                                 src += 2;
1266                         case 1:
1267                                 *dst++ = RGB565_32(dst, src, map);
1268                                 src += 2;
1269                                 break;
1270                 }
1271                 src += srcskip;
1272                 dst += dstskip;
1273         }
1274 #endif /* USE_DUFFS_LOOP */
1275 }
1276
1277 /* Special optimized blit for RGB 5-6-5 --> ARGB 8-8-8-8 */
1278 static const Uint32 RGB565_ARGB8888_LUT[512] = {
1279                 0x00000000, 0xff000000, 0x00000008, 0xff002000,
1280                 0x00000010, 0xff004000, 0x00000018, 0xff006100,
1281                 0x00000020, 0xff008100, 0x00000029, 0xff00a100,
1282                 0x00000031, 0xff00c200, 0x00000039, 0xff00e200,
1283                 0x00000041, 0xff080000, 0x0000004a, 0xff082000,
1284                 0x00000052, 0xff084000, 0x0000005a, 0xff086100,
1285                 0x00000062, 0xff088100, 0x0000006a, 0xff08a100,
1286                 0x00000073, 0xff08c200, 0x0000007b, 0xff08e200,
1287                 0x00000083, 0xff100000, 0x0000008b, 0xff102000,
1288                 0x00000094, 0xff104000, 0x0000009c, 0xff106100,
1289                 0x000000a4, 0xff108100, 0x000000ac, 0xff10a100,
1290                 0x000000b4, 0xff10c200, 0x000000bd, 0xff10e200,
1291                 0x000000c5, 0xff180000, 0x000000cd, 0xff182000,
1292                 0x000000d5, 0xff184000, 0x000000de, 0xff186100,
1293                 0x000000e6, 0xff188100, 0x000000ee, 0xff18a100,
1294                 0x000000f6, 0xff18c200, 0x000000ff, 0xff18e200,
1295                 0x00000400, 0xff200000, 0x00000408, 0xff202000,
1296                 0x00000410, 0xff204000, 0x00000418, 0xff206100,
1297                 0x00000420, 0xff208100, 0x00000429, 0xff20a100,
1298                 0x00000431, 0xff20c200, 0x00000439, 0xff20e200,
1299                 0x00000441, 0xff290000, 0x0000044a, 0xff292000,
1300                 0x00000452, 0xff294000, 0x0000045a, 0xff296100,
1301                 0x00000462, 0xff298100, 0x0000046a, 0xff29a100,
1302                 0x00000473, 0xff29c200, 0x0000047b, 0xff29e200,
1303                 0x00000483, 0xff310000, 0x0000048b, 0xff312000,
1304                 0x00000494, 0xff314000, 0x0000049c, 0xff316100,
1305                 0x000004a4, 0xff318100, 0x000004ac, 0xff31a100,
1306                 0x000004b4, 0xff31c200, 0x000004bd, 0xff31e200,
1307                 0x000004c5, 0xff390000, 0x000004cd, 0xff392000,
1308                 0x000004d5, 0xff394000, 0x000004de, 0xff396100,
1309                 0x000004e6, 0xff398100, 0x000004ee, 0xff39a100,
1310                 0x000004f6, 0xff39c200, 0x000004ff, 0xff39e200,
1311                 0x00000800, 0xff410000, 0x00000808, 0xff412000,
1312                 0x00000810, 0xff414000, 0x00000818, 0xff416100,
1313                 0x00000820, 0xff418100, 0x00000829, 0xff41a100,
1314                 0x00000831, 0xff41c200, 0x00000839, 0xff41e200,
1315                 0x00000841, 0xff4a0000, 0x0000084a, 0xff4a2000,
1316                 0x00000852, 0xff4a4000, 0x0000085a, 0xff4a6100,
1317                 0x00000862, 0xff4a8100, 0x0000086a, 0xff4aa100,
1318                 0x00000873, 0xff4ac200, 0x0000087b, 0xff4ae200,
1319                 0x00000883, 0xff520000, 0x0000088b, 0xff522000,
1320                 0x00000894, 0xff524000, 0x0000089c, 0xff526100,
1321                 0x000008a4, 0xff528100, 0x000008ac, 0xff52a100,
1322                 0x000008b4, 0xff52c200, 0x000008bd, 0xff52e200,
1323                 0x000008c5, 0xff5a0000, 0x000008cd, 0xff5a2000,
1324                 0x000008d5, 0xff5a4000, 0x000008de, 0xff5a6100,
1325                 0x000008e6, 0xff5a8100, 0x000008ee, 0xff5aa100,
1326                 0x000008f6, 0xff5ac200, 0x000008ff, 0xff5ae200,
1327                 0x00000c00, 0xff620000, 0x00000c08, 0xff622000,
1328                 0x00000c10, 0xff624000, 0x00000c18, 0xff626100,
1329                 0x00000c20, 0xff628100, 0x00000c29, 0xff62a100,
1330                 0x00000c31, 0xff62c200, 0x00000c39, 0xff62e200,
1331                 0x00000c41, 0xff6a0000, 0x00000c4a, 0xff6a2000,
1332                 0x00000c52, 0xff6a4000, 0x00000c5a, 0xff6a6100,
1333                 0x00000c62, 0xff6a8100, 0x00000c6a, 0xff6aa100,
1334                 0x00000c73, 0xff6ac200, 0x00000c7b, 0xff6ae200,
1335                 0x00000c83, 0xff730000, 0x00000c8b, 0xff732000,
1336                 0x00000c94, 0xff734000, 0x00000c9c, 0xff736100,
1337                 0x00000ca4, 0xff738100, 0x00000cac, 0xff73a100,
1338                 0x00000cb4, 0xff73c200, 0x00000cbd, 0xff73e200,
1339                 0x00000cc5, 0xff7b0000, 0x00000ccd, 0xff7b2000,
1340                 0x00000cd5, 0xff7b4000, 0x00000cde, 0xff7b6100,
1341                 0x00000ce6, 0xff7b8100, 0x00000cee, 0xff7ba100,
1342                 0x00000cf6, 0xff7bc200, 0x00000cff, 0xff7be200,
1343                 0x00001000, 0xff830000, 0x00001008, 0xff832000,
1344                 0x00001010, 0xff834000, 0x00001018, 0xff836100,
1345                 0x00001020, 0xff838100, 0x00001029, 0xff83a100,
1346                 0x00001031, 0xff83c200, 0x00001039, 0xff83e200,
1347                 0x00001041, 0xff8b0000, 0x0000104a, 0xff8b2000,
1348                 0x00001052, 0xff8b4000, 0x0000105a, 0xff8b6100,
1349                 0x00001062, 0xff8b8100, 0x0000106a, 0xff8ba100,
1350                 0x00001073, 0xff8bc200, 0x0000107b, 0xff8be200,
1351                 0x00001083, 0xff940000, 0x0000108b, 0xff942000,
1352                 0x00001094, 0xff944000, 0x0000109c, 0xff946100,
1353                 0x000010a4, 0xff948100, 0x000010ac, 0xff94a100,
1354                 0x000010b4, 0xff94c200, 0x000010bd, 0xff94e200,
1355                 0x000010c5, 0xff9c0000, 0x000010cd, 0xff9c2000,
1356                 0x000010d5, 0xff9c4000, 0x000010de, 0xff9c6100,
1357                 0x000010e6, 0xff9c8100, 0x000010ee, 0xff9ca100,
1358                 0x000010f6, 0xff9cc200, 0x000010ff, 0xff9ce200,
1359                 0x00001400, 0xffa40000, 0x00001408, 0xffa42000,
1360                 0x00001410, 0xffa44000, 0x00001418, 0xffa46100,
1361                 0x00001420, 0xffa48100, 0x00001429, 0xffa4a100,
1362                 0x00001431, 0xffa4c200, 0x00001439, 0xffa4e200,
1363                 0x00001441, 0xffac0000, 0x0000144a, 0xffac2000,
1364                 0x00001452, 0xffac4000, 0x0000145a, 0xffac6100,
1365                 0x00001462, 0xffac8100, 0x0000146a, 0xffaca100,
1366                 0x00001473, 0xffacc200, 0x0000147b, 0xfface200,
1367                 0x00001483, 0xffb40000, 0x0000148b, 0xffb42000,
1368                 0x00001494, 0xffb44000, 0x0000149c, 0xffb46100,
1369                 0x000014a4, 0xffb48100, 0x000014ac, 0xffb4a100,
1370                 0x000014b4, 0xffb4c200, 0x000014bd, 0xffb4e200,
1371                 0x000014c5, 0xffbd0000, 0x000014cd, 0xffbd2000,
1372                 0x000014d5, 0xffbd4000, 0x000014de, 0xffbd6100,
1373                 0x000014e6, 0xffbd8100, 0x000014ee, 0xffbda100,
1374                 0x000014f6, 0xffbdc200, 0x000014ff, 0xffbde200,
1375                 0x00001800, 0xffc50000, 0x00001808, 0xffc52000,
1376                 0x00001810, 0xffc54000, 0x00001818, 0xffc56100,
1377                 0x00001820, 0xffc58100, 0x00001829, 0xffc5a100,
1378                 0x00001831, 0xffc5c200, 0x00001839, 0xffc5e200,
1379                 0x00001841, 0xffcd0000, 0x0000184a, 0xffcd2000,
1380                 0x00001852, 0xffcd4000, 0x0000185a, 0xffcd6100,
1381                 0x00001862, 0xffcd8100, 0x0000186a, 0xffcda100,
1382                 0x00001873, 0xffcdc200, 0x0000187b, 0xffcde200,
1383                 0x00001883, 0xffd50000, 0x0000188b, 0xffd52000,
1384                 0x00001894, 0xffd54000, 0x0000189c, 0xffd56100,
1385                 0x000018a4, 0xffd58100, 0x000018ac, 0xffd5a100,
1386                 0x000018b4, 0xffd5c200, 0x000018bd, 0xffd5e200,
1387                 0x000018c5, 0xffde0000, 0x000018cd, 0xffde2000,
1388                 0x000018d5, 0xffde4000, 0x000018de, 0xffde6100,
1389                 0x000018e6, 0xffde8100, 0x000018ee, 0xffdea100,
1390                 0x000018f6, 0xffdec200, 0x000018ff, 0xffdee200,
1391                 0x00001c00, 0xffe60000, 0x00001c08, 0xffe62000,
1392                 0x00001c10, 0xffe64000, 0x00001c18, 0xffe66100,
1393                 0x00001c20, 0xffe68100, 0x00001c29, 0xffe6a100,
1394                 0x00001c31, 0xffe6c200, 0x00001c39, 0xffe6e200,
1395                 0x00001c41, 0xffee0000, 0x00001c4a, 0xffee2000,
1396                 0x00001c52, 0xffee4000, 0x00001c5a, 0xffee6100,
1397                 0x00001c62, 0xffee8100, 0x00001c6a, 0xffeea100,
1398                 0x00001c73, 0xffeec200, 0x00001c7b, 0xffeee200,
1399                 0x00001c83, 0xfff60000, 0x00001c8b, 0xfff62000,
1400                 0x00001c94, 0xfff64000, 0x00001c9c, 0xfff66100,
1401                 0x00001ca4, 0xfff68100, 0x00001cac, 0xfff6a100,
1402                 0x00001cb4, 0xfff6c200, 0x00001cbd, 0xfff6e200,
1403                 0x00001cc5, 0xffff0000, 0x00001ccd, 0xffff2000,
1404                 0x00001cd5, 0xffff4000, 0x00001cde, 0xffff6100,
1405                 0x00001ce6, 0xffff8100, 0x00001cee, 0xffffa100,
1406                 0x00001cf6, 0xffffc200, 0x00001cff, 0xffffe200
1407 };
1408 static void Blit_RGB565_ARGB8888(SDL_BlitInfo *info)
1409 {
1410     Blit_RGB565_32(info, RGB565_ARGB8888_LUT);
1411 }
1412
1413 /* Special optimized blit for RGB 5-6-5 --> ABGR 8-8-8-8 */
1414 static const Uint32 RGB565_ABGR8888_LUT[512] = {
1415                 0xff000000, 0x00000000, 0xff080000, 0x00002000,
1416                 0xff100000, 0x00004000, 0xff180000, 0x00006100,
1417                 0xff200000, 0x00008100, 0xff290000, 0x0000a100,
1418                 0xff310000, 0x0000c200, 0xff390000, 0x0000e200,
1419                 0xff410000, 0x00000008, 0xff4a0000, 0x00002008,
1420                 0xff520000, 0x00004008, 0xff5a0000, 0x00006108,
1421                 0xff620000, 0x00008108, 0xff6a0000, 0x0000a108,
1422                 0xff730000, 0x0000c208, 0xff7b0000, 0x0000e208,
1423                 0xff830000, 0x00000010, 0xff8b0000, 0x00002010,
1424                 0xff940000, 0x00004010, 0xff9c0000, 0x00006110,
1425                 0xffa40000, 0x00008110, 0xffac0000, 0x0000a110,
1426                 0xffb40000, 0x0000c210, 0xffbd0000, 0x0000e210,
1427                 0xffc50000, 0x00000018, 0xffcd0000, 0x00002018,
1428                 0xffd50000, 0x00004018, 0xffde0000, 0x00006118,
1429                 0xffe60000, 0x00008118, 0xffee0000, 0x0000a118,
1430                 0xfff60000, 0x0000c218, 0xffff0000, 0x0000e218,
1431                 0xff000400, 0x00000020, 0xff080400, 0x00002020,
1432                 0xff100400, 0x00004020, 0xff180400, 0x00006120,
1433                 0xff200400, 0x00008120, 0xff290400, 0x0000a120,
1434                 0xff310400, 0x0000c220, 0xff390400, 0x0000e220,
1435                 0xff410400, 0x00000029, 0xff4a0400, 0x00002029,
1436                 0xff520400, 0x00004029, 0xff5a0400, 0x00006129,
1437                 0xff620400, 0x00008129, 0xff6a0400, 0x0000a129,
1438                 0xff730400, 0x0000c229, 0xff7b0400, 0x0000e229,
1439                 0xff830400, 0x00000031, 0xff8b0400, 0x00002031,
1440                 0xff940400, 0x00004031, 0xff9c0400, 0x00006131,
1441                 0xffa40400, 0x00008131, 0xffac0400, 0x0000a131,
1442                 0xffb40400, 0x0000c231, 0xffbd0400, 0x0000e231,
1443                 0xffc50400, 0x00000039, 0xffcd0400, 0x00002039,
1444                 0xffd50400, 0x00004039, 0xffde0400, 0x00006139,
1445                 0xffe60400, 0x00008139, 0xffee0400, 0x0000a139,
1446                 0xfff60400, 0x0000c239, 0xffff0400, 0x0000e239,
1447                 0xff000800, 0x00000041, 0xff080800, 0x00002041,
1448                 0xff100800, 0x00004041, 0xff180800, 0x00006141,
1449                 0xff200800, 0x00008141, 0xff290800, 0x0000a141,
1450                 0xff310800, 0x0000c241, 0xff390800, 0x0000e241,
1451                 0xff410800, 0x0000004a, 0xff4a0800, 0x0000204a,
1452                 0xff520800, 0x0000404a, 0xff5a0800, 0x0000614a,
1453                 0xff620800, 0x0000814a, 0xff6a0800, 0x0000a14a,
1454                 0xff730800, 0x0000c24a, 0xff7b0800, 0x0000e24a,
1455                 0xff830800, 0x00000052, 0xff8b0800, 0x00002052,
1456                 0xff940800, 0x00004052, 0xff9c0800, 0x00006152,
1457                 0xffa40800, 0x00008152, 0xffac0800, 0x0000a152,
1458                 0xffb40800, 0x0000c252, 0xffbd0800, 0x0000e252,
1459                 0xffc50800, 0x0000005a, 0xffcd0800, 0x0000205a,
1460                 0xffd50800, 0x0000405a, 0xffde0800, 0x0000615a,
1461                 0xffe60800, 0x0000815a, 0xffee0800, 0x0000a15a,
1462                 0xfff60800, 0x0000c25a, 0xffff0800, 0x0000e25a,
1463                 0xff000c00, 0x00000062, 0xff080c00, 0x00002062,
1464                 0xff100c00, 0x00004062, 0xff180c00, 0x00006162,
1465                 0xff200c00, 0x00008162, 0xff290c00, 0x0000a162,
1466                 0xff310c00, 0x0000c262, 0xff390c00, 0x0000e262,
1467                 0xff410c00, 0x0000006a, 0xff4a0c00, 0x0000206a,
1468                 0xff520c00, 0x0000406a, 0xff5a0c00, 0x0000616a,
1469                 0xff620c00, 0x0000816a, 0xff6a0c00, 0x0000a16a,
1470                 0xff730c00, 0x0000c26a, 0xff7b0c00, 0x0000e26a,
1471                 0xff830c00, 0x00000073, 0xff8b0c00, 0x00002073,
1472                 0xff940c00, 0x00004073, 0xff9c0c00, 0x00006173,
1473                 0xffa40c00, 0x00008173, 0xffac0c00, 0x0000a173,
1474                 0xffb40c00, 0x0000c273, 0xffbd0c00, 0x0000e273,
1475                 0xffc50c00, 0x0000007b, 0xffcd0c00, 0x0000207b,
1476                 0xffd50c00, 0x0000407b, 0xffde0c00, 0x0000617b,
1477                 0xffe60c00, 0x0000817b, 0xffee0c00, 0x0000a17b,
1478                 0xfff60c00, 0x0000c27b, 0xffff0c00, 0x0000e27b,
1479                 0xff001000, 0x00000083, 0xff081000, 0x00002083,
1480                 0xff101000, 0x00004083, 0xff181000, 0x00006183,
1481                 0xff201000, 0x00008183, 0xff291000, 0x0000a183,
1482                 0xff311000, 0x0000c283, 0xff391000, 0x0000e283,
1483                 0xff411000, 0x0000008b, 0xff4a1000, 0x0000208b,
1484                 0xff521000, 0x0000408b, 0xff5a1000, 0x0000618b,
1485                 0xff621000, 0x0000818b, 0xff6a1000, 0x0000a18b,
1486                 0xff731000, 0x0000c28b, 0xff7b1000, 0x0000e28b,
1487                 0xff831000, 0x00000094, 0xff8b1000, 0x00002094,
1488                 0xff941000, 0x00004094, 0xff9c1000, 0x00006194,
1489                 0xffa41000, 0x00008194, 0xffac1000, 0x0000a194,
1490                 0xffb41000, 0x0000c294, 0xffbd1000, 0x0000e294,
1491                 0xffc51000, 0x0000009c, 0xffcd1000, 0x0000209c,
1492                 0xffd51000, 0x0000409c, 0xffde1000, 0x0000619c,
1493                 0xffe61000, 0x0000819c, 0xffee1000, 0x0000a19c,
1494                 0xfff61000, 0x0000c29c, 0xffff1000, 0x0000e29c,
1495                 0xff001400, 0x000000a4, 0xff081400, 0x000020a4,
1496                 0xff101400, 0x000040a4, 0xff181400, 0x000061a4,
1497                 0xff201400, 0x000081a4, 0xff291400, 0x0000a1a4,
1498                 0xff311400, 0x0000c2a4, 0xff391400, 0x0000e2a4,
1499                 0xff411400, 0x000000ac, 0xff4a1400, 0x000020ac,
1500                 0xff521400, 0x000040ac, 0xff5a1400, 0x000061ac,
1501                 0xff621400, 0x000081ac, 0xff6a1400, 0x0000a1ac,
1502                 0xff731400, 0x0000c2ac, 0xff7b1400, 0x0000e2ac,
1503                 0xff831400, 0x000000b4, 0xff8b1400, 0x000020b4,
1504                 0xff941400, 0x000040b4, 0xff9c1400, 0x000061b4,
1505                 0xffa41400, 0x000081b4, 0xffac1400, 0x0000a1b4,
1506                 0xffb41400, 0x0000c2b4, 0xffbd1400, 0x0000e2b4,
1507                 0xffc51400, 0x000000bd, 0xffcd1400, 0x000020bd,
1508                 0xffd51400, 0x000040bd, 0xffde1400, 0x000061bd,
1509                 0xffe61400, 0x000081bd, 0xffee1400, 0x0000a1bd,
1510                 0xfff61400, 0x0000c2bd, 0xffff1400, 0x0000e2bd,
1511                 0xff001800, 0x000000c5, 0xff081800, 0x000020c5,
1512                 0xff101800, 0x000040c5, 0xff181800, 0x000061c5,
1513                 0xff201800, 0x000081c5, 0xff291800, 0x0000a1c5,
1514                 0xff311800, 0x0000c2c5, 0xff391800, 0x0000e2c5,
1515                 0xff411800, 0x000000cd, 0xff4a1800, 0x000020cd,
1516                 0xff521800, 0x000040cd, 0xff5a1800, 0x000061cd,
1517                 0xff621800, 0x000081cd, 0xff6a1800, 0x0000a1cd,
1518                 0xff731800, 0x0000c2cd, 0xff7b1800, 0x0000e2cd,
1519                 0xff831800, 0x000000d5, 0xff8b1800, 0x000020d5,
1520                 0xff941800, 0x000040d5, 0xff9c1800, 0x000061d5,
1521                 0xffa41800, 0x000081d5, 0xffac1800, 0x0000a1d5,
1522                 0xffb41800, 0x0000c2d5, 0xffbd1800, 0x0000e2d5,
1523                 0xffc51800, 0x000000de, 0xffcd1800, 0x000020de,
1524                 0xffd51800, 0x000040de, 0xffde1800, 0x000061de,
1525                 0xffe61800, 0x000081de, 0xffee1800, 0x0000a1de,
1526                 0xfff61800, 0x0000c2de, 0xffff1800, 0x0000e2de,
1527                 0xff001c00, 0x000000e6, 0xff081c00, 0x000020e6,
1528                 0xff101c00, 0x000040e6, 0xff181c00, 0x000061e6,
1529                 0xff201c00, 0x000081e6, 0xff291c00, 0x0000a1e6,
1530                 0xff311c00, 0x0000c2e6, 0xff391c00, 0x0000e2e6,
1531                 0xff411c00, 0x000000ee, 0xff4a1c00, 0x000020ee,
1532                 0xff521c00, 0x000040ee, 0xff5a1c00, 0x000061ee,
1533                 0xff621c00, 0x000081ee, 0xff6a1c00, 0x0000a1ee,
1534                 0xff731c00, 0x0000c2ee, 0xff7b1c00, 0x0000e2ee,
1535                 0xff831c00, 0x000000f6, 0xff8b1c00, 0x000020f6,
1536                 0xff941c00, 0x000040f6, 0xff9c1c00, 0x000061f6,
1537                 0xffa41c00, 0x000081f6, 0xffac1c00, 0x0000a1f6,
1538                 0xffb41c00, 0x0000c2f6, 0xffbd1c00, 0x0000e2f6,
1539                 0xffc51c00, 0x000000ff, 0xffcd1c00, 0x000020ff,
1540                 0xffd51c00, 0x000040ff, 0xffde1c00, 0x000061ff,
1541                 0xffe61c00, 0x000081ff, 0xffee1c00, 0x0000a1ff,
1542                 0xfff61c00, 0x0000c2ff, 0xffff1c00, 0x0000e2ff
1543 };
1544 static void Blit_RGB565_ABGR8888(SDL_BlitInfo *info)
1545 {
1546     Blit_RGB565_32(info, RGB565_ABGR8888_LUT);
1547 }
1548
1549 /* Special optimized blit for RGB 5-6-5 --> RGBA 8-8-8-8 */
1550 static const Uint32 RGB565_RGBA8888_LUT[512] = {
1551                 0x000000ff, 0x00000000, 0x000008ff, 0x00200000,
1552                 0x000010ff, 0x00400000, 0x000018ff, 0x00610000,
1553                 0x000020ff, 0x00810000, 0x000029ff, 0x00a10000,
1554                 0x000031ff, 0x00c20000, 0x000039ff, 0x00e20000,
1555                 0x000041ff, 0x08000000, 0x00004aff, 0x08200000,
1556                 0x000052ff, 0x08400000, 0x00005aff, 0x08610000,
1557                 0x000062ff, 0x08810000, 0x00006aff, 0x08a10000,
1558                 0x000073ff, 0x08c20000, 0x00007bff, 0x08e20000,
1559                 0x000083ff, 0x10000000, 0x00008bff, 0x10200000,
1560                 0x000094ff, 0x10400000, 0x00009cff, 0x10610000,
1561                 0x0000a4ff, 0x10810000, 0x0000acff, 0x10a10000,
1562                 0x0000b4ff, 0x10c20000, 0x0000bdff, 0x10e20000,
1563                 0x0000c5ff, 0x18000000, 0x0000cdff, 0x18200000,
1564                 0x0000d5ff, 0x18400000, 0x0000deff, 0x18610000,
1565                 0x0000e6ff, 0x18810000, 0x0000eeff, 0x18a10000,
1566                 0x0000f6ff, 0x18c20000, 0x0000ffff, 0x18e20000,
1567                 0x000400ff, 0x20000000, 0x000408ff, 0x20200000,
1568                 0x000410ff, 0x20400000, 0x000418ff, 0x20610000,
1569                 0x000420ff, 0x20810000, 0x000429ff, 0x20a10000,
1570                 0x000431ff, 0x20c20000, 0x000439ff, 0x20e20000,
1571                 0x000441ff, 0x29000000, 0x00044aff, 0x29200000,
1572                 0x000452ff, 0x29400000, 0x00045aff, 0x29610000,
1573                 0x000462ff, 0x29810000, 0x00046aff, 0x29a10000,
1574                 0x000473ff, 0x29c20000, 0x00047bff, 0x29e20000,
1575                 0x000483ff, 0x31000000, 0x00048bff, 0x31200000,
1576                 0x000494ff, 0x31400000, 0x00049cff, 0x31610000,
1577                 0x0004a4ff, 0x31810000, 0x0004acff, 0x31a10000,
1578                 0x0004b4ff, 0x31c20000, 0x0004bdff, 0x31e20000,
1579                 0x0004c5ff, 0x39000000, 0x0004cdff, 0x39200000,
1580                 0x0004d5ff, 0x39400000, 0x0004deff, 0x39610000,
1581                 0x0004e6ff, 0x39810000, 0x0004eeff, 0x39a10000,
1582                 0x0004f6ff, 0x39c20000, 0x0004ffff, 0x39e20000,
1583                 0x000800ff, 0x41000000, 0x000808ff, 0x41200000,
1584                 0x000810ff, 0x41400000, 0x000818ff, 0x41610000,
1585                 0x000820ff, 0x41810000, 0x000829ff, 0x41a10000,
1586                 0x000831ff, 0x41c20000, 0x000839ff, 0x41e20000,
1587                 0x000841ff, 0x4a000000, 0x00084aff, 0x4a200000,
1588                 0x000852ff, 0x4a400000, 0x00085aff, 0x4a610000,
1589                 0x000862ff, 0x4a810000, 0x00086aff, 0x4aa10000,
1590                 0x000873ff, 0x4ac20000, 0x00087bff, 0x4ae20000,
1591                 0x000883ff, 0x52000000, 0x00088bff, 0x52200000,
1592                 0x000894ff, 0x52400000, 0x00089cff, 0x52610000,
1593                 0x0008a4ff, 0x52810000, 0x0008acff, 0x52a10000,
1594                 0x0008b4ff, 0x52c20000, 0x0008bdff, 0x52e20000,
1595                 0x0008c5ff, 0x5a000000, 0x0008cdff, 0x5a200000,
1596                 0x0008d5ff, 0x5a400000, 0x0008deff, 0x5a610000,
1597                 0x0008e6ff, 0x5a810000, 0x0008eeff, 0x5aa10000,
1598                 0x0008f6ff, 0x5ac20000, 0x0008ffff, 0x5ae20000,
1599                 0x000c00ff, 0x62000000, 0x000c08ff, 0x62200000,
1600                 0x000c10ff, 0x62400000, 0x000c18ff, 0x62610000,
1601                 0x000c20ff, 0x62810000, 0x000c29ff, 0x62a10000,
1602                 0x000c31ff, 0x62c20000, 0x000c39ff, 0x62e20000,
1603                 0x000c41ff, 0x6a000000, 0x000c4aff, 0x6a200000,
1604                 0x000c52ff, 0x6a400000, 0x000c5aff, 0x6a610000,
1605                 0x000c62ff, 0x6a810000, 0x000c6aff, 0x6aa10000,
1606                 0x000c73ff, 0x6ac20000, 0x000c7bff, 0x6ae20000,
1607                 0x000c83ff, 0x73000000, 0x000c8bff, 0x73200000,
1608                 0x000c94ff, 0x73400000, 0x000c9cff, 0x73610000,
1609                 0x000ca4ff, 0x73810000, 0x000cacff, 0x73a10000,
1610                 0x000cb4ff, 0x73c20000, 0x000cbdff, 0x73e20000,
1611                 0x000cc5ff, 0x7b000000, 0x000ccdff, 0x7b200000,
1612                 0x000cd5ff, 0x7b400000, 0x000cdeff, 0x7b610000,
1613                 0x000ce6ff, 0x7b810000, 0x000ceeff, 0x7ba10000,
1614                 0x000cf6ff, 0x7bc20000, 0x000cffff, 0x7be20000,
1615                 0x001000ff, 0x83000000, 0x001008ff, 0x83200000,
1616                 0x001010ff, 0x83400000, 0x001018ff, 0x83610000,
1617                 0x001020ff, 0x83810000, 0x001029ff, 0x83a10000,
1618                 0x001031ff, 0x83c20000, 0x001039ff, 0x83e20000,
1619                 0x001041ff, 0x8b000000, 0x00104aff, 0x8b200000,
1620                 0x001052ff, 0x8b400000, 0x00105aff, 0x8b610000,
1621                 0x001062ff, 0x8b810000, 0x00106aff, 0x8ba10000,
1622                 0x001073ff, 0x8bc20000, 0x00107bff, 0x8be20000,
1623                 0x001083ff, 0x94000000, 0x00108bff, 0x94200000,
1624                 0x001094ff, 0x94400000, 0x00109cff, 0x94610000,
1625                 0x0010a4ff, 0x94810000, 0x0010acff, 0x94a10000,
1626                 0x0010b4ff, 0x94c20000, 0x0010bdff, 0x94e20000,
1627                 0x0010c5ff, 0x9c000000, 0x0010cdff, 0x9c200000,
1628                 0x0010d5ff, 0x9c400000, 0x0010deff, 0x9c610000,
1629                 0x0010e6ff, 0x9c810000, 0x0010eeff, 0x9ca10000,
1630                 0x0010f6ff, 0x9cc20000, 0x0010ffff, 0x9ce20000,
1631                 0x001400ff, 0xa4000000, 0x001408ff, 0xa4200000,
1632                 0x001410ff, 0xa4400000, 0x001418ff, 0xa4610000,
1633                 0x001420ff, 0xa4810000, 0x001429ff, 0xa4a10000,
1634                 0x001431ff, 0xa4c20000, 0x001439ff, 0xa4e20000,
1635                 0x001441ff, 0xac000000, 0x00144aff, 0xac200000,
1636                 0x001452ff, 0xac400000, 0x00145aff, 0xac610000,
1637                 0x001462ff, 0xac810000, 0x00146aff, 0xaca10000,
1638                 0x001473ff, 0xacc20000, 0x00147bff, 0xace20000,
1639                 0x001483ff, 0xb4000000, 0x00148bff, 0xb4200000,
1640                 0x001494ff, 0xb4400000, 0x00149cff, 0xb4610000,
1641                 0x0014a4ff, 0xb4810000, 0x0014acff, 0xb4a10000,
1642                 0x0014b4ff, 0xb4c20000, 0x0014bdff, 0xb4e20000,
1643                 0x0014c5ff, 0xbd000000, 0x0014cdff, 0xbd200000,
1644                 0x0014d5ff, 0xbd400000, 0x0014deff, 0xbd610000,
1645                 0x0014e6ff, 0xbd810000, 0x0014eeff, 0xbda10000,
1646                 0x0014f6ff, 0xbdc20000, 0x0014ffff, 0xbde20000,
1647                 0x001800ff, 0xc5000000, 0x001808ff, 0xc5200000,
1648                 0x001810ff, 0xc5400000, 0x001818ff, 0xc5610000,
1649                 0x001820ff, 0xc5810000, 0x001829ff, 0xc5a10000,
1650                 0x001831ff, 0xc5c20000, 0x001839ff, 0xc5e20000,
1651                 0x001841ff, 0xcd000000, 0x00184aff, 0xcd200000,
1652                 0x001852ff, 0xcd400000, 0x00185aff, 0xcd610000,
1653                 0x001862ff, 0xcd810000, 0x00186aff, 0xcda10000,
1654                 0x001873ff, 0xcdc20000, 0x00187bff, 0xcde20000,
1655                 0x001883ff, 0xd5000000, 0x00188bff, 0xd5200000,
1656                 0x001894ff, 0xd5400000, 0x00189cff, 0xd5610000,
1657                 0x0018a4ff, 0xd5810000, 0x0018acff, 0xd5a10000,
1658                 0x0018b4ff, 0xd5c20000, 0x0018bdff, 0xd5e20000,
1659                 0x0018c5ff, 0xde000000, 0x0018cdff, 0xde200000,
1660                 0x0018d5ff, 0xde400000, 0x0018deff, 0xde610000,
1661                 0x0018e6ff, 0xde810000, 0x0018eeff, 0xdea10000,
1662                 0x0018f6ff, 0xdec20000, 0x0018ffff, 0xdee20000,
1663                 0x001c00ff, 0xe6000000, 0x001c08ff, 0xe6200000,
1664                 0x001c10ff, 0xe6400000, 0x001c18ff, 0xe6610000,
1665                 0x001c20ff, 0xe6810000, 0x001c29ff, 0xe6a10000,
1666                 0x001c31ff, 0xe6c20000, 0x001c39ff, 0xe6e20000,
1667                 0x001c41ff, 0xee000000, 0x001c4aff, 0xee200000,
1668                 0x001c52ff, 0xee400000, 0x001c5aff, 0xee610000,
1669                 0x001c62ff, 0xee810000, 0x001c6aff, 0xeea10000,
1670                 0x001c73ff, 0xeec20000, 0x001c7bff, 0xeee20000,
1671                 0x001c83ff, 0xf6000000, 0x001c8bff, 0xf6200000,
1672                 0x001c94ff, 0xf6400000, 0x001c9cff, 0xf6610000,
1673                 0x001ca4ff, 0xf6810000, 0x001cacff, 0xf6a10000,
1674                 0x001cb4ff, 0xf6c20000, 0x001cbdff, 0xf6e20000,
1675                 0x001cc5ff, 0xff000000, 0x001ccdff, 0xff200000,
1676                 0x001cd5ff, 0xff400000, 0x001cdeff, 0xff610000,
1677                 0x001ce6ff, 0xff810000, 0x001ceeff, 0xffa10000,
1678                 0x001cf6ff, 0xffc20000, 0x001cffff, 0xffe20000,
1679 };
1680 static void Blit_RGB565_RGBA8888(SDL_BlitInfo *info)
1681 {
1682     Blit_RGB565_32(info, RGB565_RGBA8888_LUT);
1683 }
1684
1685 /* Special optimized blit for RGB 5-6-5 --> BGRA 8-8-8-8 */
1686 static const Uint32 RGB565_BGRA8888_LUT[512] = {
1687                 0x00000000, 0x000000ff, 0x08000000, 0x002000ff,
1688                 0x10000000, 0x004000ff, 0x18000000, 0x006100ff,
1689                 0x20000000, 0x008100ff, 0x29000000, 0x00a100ff,
1690                 0x31000000, 0x00c200ff, 0x39000000, 0x00e200ff,
1691                 0x41000000, 0x000008ff, 0x4a000000, 0x002008ff,
1692                 0x52000000, 0x004008ff, 0x5a000000, 0x006108ff,
1693                 0x62000000, 0x008108ff, 0x6a000000, 0x00a108ff,
1694                 0x73000000, 0x00c208ff, 0x7b000000, 0x00e208ff,
1695                 0x83000000, 0x000010ff, 0x8b000000, 0x002010ff,
1696                 0x94000000, 0x004010ff, 0x9c000000, 0x006110ff,
1697                 0xa4000000, 0x008110ff, 0xac000000, 0x00a110ff,
1698                 0xb4000000, 0x00c210ff, 0xbd000000, 0x00e210ff,
1699                 0xc5000000, 0x000018ff, 0xcd000000, 0x002018ff,
1700                 0xd5000000, 0x004018ff, 0xde000000, 0x006118ff,
1701                 0xe6000000, 0x008118ff, 0xee000000, 0x00a118ff,
1702                 0xf6000000, 0x00c218ff, 0xff000000, 0x00e218ff,
1703                 0x00040000, 0x000020ff, 0x08040000, 0x002020ff,
1704                 0x10040000, 0x004020ff, 0x18040000, 0x006120ff,
1705                 0x20040000, 0x008120ff, 0x29040000, 0x00a120ff,
1706                 0x31040000, 0x00c220ff, 0x39040000, 0x00e220ff,
1707                 0x41040000, 0x000029ff, 0x4a040000, 0x002029ff,
1708                 0x52040000, 0x004029ff, 0x5a040000, 0x006129ff,
1709                 0x62040000, 0x008129ff, 0x6a040000, 0x00a129ff,
1710                 0x73040000, 0x00c229ff, 0x7b040000, 0x00e229ff,
1711                 0x83040000, 0x000031ff, 0x8b040000, 0x002031ff,
1712                 0x94040000, 0x004031ff, 0x9c040000, 0x006131ff,
1713                 0xa4040000, 0x008131ff, 0xac040000, 0x00a131ff,
1714                 0xb4040000, 0x00c231ff, 0xbd040000, 0x00e231ff,
1715                 0xc5040000, 0x000039ff, 0xcd040000, 0x002039ff,
1716                 0xd5040000, 0x004039ff, 0xde040000, 0x006139ff,
1717                 0xe6040000, 0x008139ff, 0xee040000, 0x00a139ff,
1718                 0xf6040000, 0x00c239ff, 0xff040000, 0x00e239ff,
1719                 0x00080000, 0x000041ff, 0x08080000, 0x002041ff,
1720                 0x10080000, 0x004041ff, 0x18080000, 0x006141ff,
1721                 0x20080000, 0x008141ff, 0x29080000, 0x00a141ff,
1722                 0x31080000, 0x00c241ff, 0x39080000, 0x00e241ff,
1723                 0x41080000, 0x00004aff, 0x4a080000, 0x00204aff,
1724                 0x52080000, 0x00404aff, 0x5a080000, 0x00614aff,
1725                 0x62080000, 0x00814aff, 0x6a080000, 0x00a14aff,
1726                 0x73080000, 0x00c24aff, 0x7b080000, 0x00e24aff,
1727                 0x83080000, 0x000052ff, 0x8b080000, 0x002052ff,
1728                 0x94080000, 0x004052ff, 0x9c080000, 0x006152ff,
1729                 0xa4080000, 0x008152ff, 0xac080000, 0x00a152ff,
1730                 0xb4080000, 0x00c252ff, 0xbd080000, 0x00e252ff,
1731                 0xc5080000, 0x00005aff, 0xcd080000, 0x00205aff,
1732                 0xd5080000, 0x00405aff, 0xde080000, 0x00615aff,
1733                 0xe6080000, 0x00815aff, 0xee080000, 0x00a15aff,
1734                 0xf6080000, 0x00c25aff, 0xff080000, 0x00e25aff,
1735                 0x000c0000, 0x000062ff, 0x080c0000, 0x002062ff,
1736                 0x100c0000, 0x004062ff, 0x180c0000, 0x006162ff,
1737                 0x200c0000, 0x008162ff, 0x290c0000, 0x00a162ff,
1738                 0x310c0000, 0x00c262ff, 0x390c0000, 0x00e262ff,
1739                 0x410c0000, 0x00006aff, 0x4a0c0000, 0x00206aff,
1740                 0x520c0000, 0x00406aff, 0x5a0c0000, 0x00616aff,
1741                 0x620c0000, 0x00816aff, 0x6a0c0000, 0x00a16aff,
1742                 0x730c0000, 0x00c26aff, 0x7b0c0000, 0x00e26aff,
1743                 0x830c0000, 0x000073ff, 0x8b0c0000, 0x002073ff,
1744                 0x940c0000, 0x004073ff, 0x9c0c0000, 0x006173ff,
1745                 0xa40c0000, 0x008173ff, 0xac0c0000, 0x00a173ff,
1746                 0xb40c0000, 0x00c273ff, 0xbd0c0000, 0x00e273ff,
1747                 0xc50c0000, 0x00007bff, 0xcd0c0000, 0x00207bff,
1748                 0xd50c0000, 0x00407bff, 0xde0c0000, 0x00617bff,
1749                 0xe60c0000, 0x00817bff, 0xee0c0000, 0x00a17bff,
1750                 0xf60c0000, 0x00c27bff, 0xff0c0000, 0x00e27bff,
1751                 0x00100000, 0x000083ff, 0x08100000, 0x002083ff,
1752                 0x10100000, 0x004083ff, 0x18100000, 0x006183ff,
1753                 0x20100000, 0x008183ff, 0x29100000, 0x00a183ff,
1754                 0x31100000, 0x00c283ff, 0x39100000, 0x00e283ff,
1755                 0x41100000, 0x00008bff, 0x4a100000, 0x00208bff,
1756                 0x52100000, 0x00408bff, 0x5a100000, 0x00618bff,
1757                 0x62100000, 0x00818bff, 0x6a100000, 0x00a18bff,
1758                 0x73100000, 0x00c28bff, 0x7b100000, 0x00e28bff,
1759                 0x83100000, 0x000094ff, 0x8b100000, 0x002094ff,
1760                 0x94100000, 0x004094ff, 0x9c100000, 0x006194ff,
1761                 0xa4100000, 0x008194ff, 0xac100000, 0x00a194ff,
1762                 0xb4100000, 0x00c294ff, 0xbd100000, 0x00e294ff,
1763                 0xc5100000, 0x00009cff, 0xcd100000, 0x00209cff,
1764                 0xd5100000, 0x00409cff, 0xde100000, 0x00619cff,
1765                 0xe6100000, 0x00819cff, 0xee100000, 0x00a19cff,
1766                 0xf6100000, 0x00c29cff, 0xff100000, 0x00e29cff,
1767                 0x00140000, 0x0000a4ff, 0x08140000, 0x0020a4ff,
1768                 0x10140000, 0x0040a4ff, 0x18140000, 0x0061a4ff,
1769                 0x20140000, 0x0081a4ff, 0x29140000, 0x00a1a4ff,
1770                 0x31140000, 0x00c2a4ff, 0x39140000, 0x00e2a4ff,
1771                 0x41140000, 0x0000acff, 0x4a140000, 0x0020acff,
1772                 0x52140000, 0x0040acff, 0x5a140000, 0x0061acff,
1773                 0x62140000, 0x0081acff, 0x6a140000, 0x00a1acff,
1774                 0x73140000, 0x00c2acff, 0x7b140000, 0x00e2acff,
1775                 0x83140000, 0x0000b4ff, 0x8b140000, 0x0020b4ff,
1776                 0x94140000, 0x0040b4ff, 0x9c140000, 0x0061b4ff,
1777                 0xa4140000, 0x0081b4ff, 0xac140000, 0x00a1b4ff,
1778                 0xb4140000, 0x00c2b4ff, 0xbd140000, 0x00e2b4ff,
1779                 0xc5140000, 0x0000bdff, 0xcd140000, 0x0020bdff,
1780                 0xd5140000, 0x0040bdff, 0xde140000, 0x0061bdff,
1781                 0xe6140000, 0x0081bdff, 0xee140000, 0x00a1bdff,
1782                 0xf6140000, 0x00c2bdff, 0xff140000, 0x00e2bdff,
1783                 0x00180000, 0x0000c5ff, 0x08180000, 0x0020c5ff,
1784                 0x10180000, 0x0040c5ff, 0x18180000, 0x0061c5ff,
1785                 0x20180000, 0x0081c5ff, 0x29180000, 0x00a1c5ff,
1786                 0x31180000, 0x00c2c5ff, 0x39180000, 0x00e2c5ff,
1787                 0x41180000, 0x0000cdff, 0x4a180000, 0x0020cdff,
1788                 0x52180000, 0x0040cdff, 0x5a180000, 0x0061cdff,
1789                 0x62180000, 0x0081cdff, 0x6a180000, 0x00a1cdff,
1790                 0x73180000, 0x00c2cdff, 0x7b180000, 0x00e2cdff,
1791                 0x83180000, 0x0000d5ff, 0x8b180000, 0x0020d5ff,
1792                 0x94180000, 0x0040d5ff, 0x9c180000, 0x0061d5ff,
1793                 0xa4180000, 0x0081d5ff, 0xac180000, 0x00a1d5ff,
1794                 0xb4180000, 0x00c2d5ff, 0xbd180000, 0x00e2d5ff,
1795                 0xc5180000, 0x0000deff, 0xcd180000, 0x0020deff,
1796                 0xd5180000, 0x0040deff, 0xde180000, 0x0061deff,
1797                 0xe6180000, 0x0081deff, 0xee180000, 0x00a1deff,
1798                 0xf6180000, 0x00c2deff, 0xff180000, 0x00e2deff,
1799                 0x001c0000, 0x0000e6ff, 0x081c0000, 0x0020e6ff,
1800                 0x101c0000, 0x0040e6ff, 0x181c0000, 0x0061e6ff,
1801                 0x201c0000, 0x0081e6ff, 0x291c0000, 0x00a1e6ff,
1802                 0x311c0000, 0x00c2e6ff, 0x391c0000, 0x00e2e6ff,
1803                 0x411c0000, 0x0000eeff, 0x4a1c0000, 0x0020eeff,
1804                 0x521c0000, 0x0040eeff, 0x5a1c0000, 0x0061eeff,
1805                 0x621c0000, 0x0081eeff, 0x6a1c0000, 0x00a1eeff,
1806                 0x731c0000, 0x00c2eeff, 0x7b1c0000, 0x00e2eeff,
1807                 0x831c0000, 0x0000f6ff, 0x8b1c0000, 0x0020f6ff,
1808                 0x941c0000, 0x0040f6ff, 0x9c1c0000, 0x0061f6ff,
1809                 0xa41c0000, 0x0081f6ff, 0xac1c0000, 0x00a1f6ff,
1810                 0xb41c0000, 0x00c2f6ff, 0xbd1c0000, 0x00e2f6ff,
1811                 0xc51c0000, 0x0000ffff, 0xcd1c0000, 0x0020ffff,
1812                 0xd51c0000, 0x0040ffff, 0xde1c0000, 0x0061ffff,
1813                 0xe61c0000, 0x0081ffff, 0xee1c0000, 0x00a1ffff,
1814                 0xf61c0000, 0x00c2ffff, 0xff1c0000, 0x00e2ffff
1815 };
1816 static void Blit_RGB565_BGRA8888(SDL_BlitInfo *info)
1817 {
1818     Blit_RGB565_32(info, RGB565_BGRA8888_LUT);
1819 }
1820
1821 /* Special optimized blit for RGB 8-8-8 --> RGB 3-3-2 */
1822 #ifndef RGB888_RGB332
1823 #define RGB888_RGB332(dst, src) { \
1824         dst = (((src)&0x00E00000)>>16)| \
1825               (((src)&0x0000E000)>>11)| \
1826               (((src)&0x000000C0)>>6); \
1827 }
1828 #endif
1829 static void Blit_RGB888_index8_map(SDL_BlitInfo *info)
1830 {
1831 #ifndef USE_DUFFS_LOOP
1832         int c;
1833 #endif
1834         int Pixel;
1835         int width, height;
1836         Uint32 *src;
1837         const Uint8 *map;
1838         Uint8 *dst;
1839         int srcskip, dstskip;
1840
1841         /* Set up some basic variables */
1842         width = info->d_width;
1843         height = info->d_height;
1844         src = (Uint32 *)info->s_pixels;
1845         srcskip = info->s_skip/4;
1846         dst = info->d_pixels;
1847         dstskip = info->d_skip;
1848         map = info->table;
1849
1850 #ifdef USE_DUFFS_LOOP
1851         while ( height-- ) {
1852                 DUFFS_LOOP(
1853                         RGB888_RGB332(Pixel, *src);
1854                         *dst++ = map[Pixel];
1855                         ++src;
1856                 , width);
1857                 src += srcskip;
1858                 dst += dstskip;
1859         }
1860 #else
1861         while ( height-- ) {
1862                 for ( c=width/4; c; --c ) {
1863                         /* Pack RGB into 8bit pixel */
1864                         RGB888_RGB332(Pixel, *src);
1865                         *dst++ = map[Pixel];
1866                         ++src;
1867                         RGB888_RGB332(Pixel, *src);
1868                         *dst++ = map[Pixel];
1869                         ++src;
1870                         RGB888_RGB332(Pixel, *src);
1871                         *dst++ = map[Pixel];
1872                         ++src;
1873                         RGB888_RGB332(Pixel, *src);
1874                         *dst++ = map[Pixel];
1875                         ++src;
1876                 }
1877                 switch ( width & 3 ) {
1878                         case 3:
1879                                 RGB888_RGB332(Pixel, *src);
1880                                 *dst++ = map[Pixel];
1881                                 ++src;
1882                         case 2:
1883                                 RGB888_RGB332(Pixel, *src);
1884                                 *dst++ = map[Pixel];
1885                                 ++src;
1886                         case 1:
1887                                 RGB888_RGB332(Pixel, *src);
1888                                 *dst++ = map[Pixel];
1889                                 ++src;
1890                 }
1891                 src += srcskip;
1892                 dst += dstskip;
1893         }
1894 #endif /* USE_DUFFS_LOOP */
1895 }
1896 static void BlitNto1(SDL_BlitInfo *info)
1897 {
1898 #ifndef USE_DUFFS_LOOP
1899         int c;
1900 #endif
1901         int width, height;
1902         Uint8 *src;
1903         const Uint8 *map;
1904         Uint8 *dst;
1905         int srcskip, dstskip;
1906         int srcbpp;
1907         Uint32 Pixel;
1908         int  sR, sG, sB;
1909         SDL_PixelFormat *srcfmt;
1910
1911         /* Set up some basic variables */
1912         width = info->d_width;
1913         height = info->d_height;
1914         src = info->s_pixels;
1915         srcskip = info->s_skip;
1916         dst = info->d_pixels;
1917         dstskip = info->d_skip;
1918         map = info->table;
1919         srcfmt = info->src;
1920         srcbpp = srcfmt->BytesPerPixel;
1921
1922         if ( map == NULL ) {
1923                 while ( height-- ) {
1924 #ifdef USE_DUFFS_LOOP
1925                         DUFFS_LOOP(
1926                                 DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel,
1927                                                                 sR, sG, sB);
1928                                 if ( 1 ) {
1929                                         /* Pack RGB into 8bit pixel */
1930                                         *dst = ((sR>>5)<<(3+2))|
1931                                                 ((sG>>5)<<(2)) |
1932                                                 ((sB>>6)<<(0)) ;
1933                                 }
1934                                 dst++;
1935                                 src += srcbpp;
1936                         , width);
1937 #else
1938                         for ( c=width; c; --c ) {
1939                                 DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel,
1940                                                                 sR, sG, sB);
1941                                 if ( 1 ) {
1942                                         /* Pack RGB into 8bit pixel */
1943                                         *dst = ((sR>>5)<<(3+2))|
1944                                                 ((sG>>5)<<(2)) |
1945                                                 ((sB>>6)<<(0)) ;
1946                                 }
1947                                 dst++;
1948                                 src += srcbpp;
1949                         }
1950 #endif
1951                         src += srcskip;
1952                         dst += dstskip;
1953                 }
1954         } else {
1955                 while ( height-- ) {
1956 #ifdef USE_DUFFS_LOOP
1957                         DUFFS_LOOP(
1958                                 DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel,
1959                                                                 sR, sG, sB);
1960                                 if ( 1 ) {
1961                                         /* Pack RGB into 8bit pixel */
1962                                         *dst = map[((sR>>5)<<(3+2))|
1963                                                    ((sG>>5)<<(2))  |
1964                                                    ((sB>>6)<<(0))  ];
1965                                 }
1966                                 dst++;
1967                                 src += srcbpp;
1968                         , width);
1969 #else
1970                         for ( c=width; c; --c ) {
1971                                 DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel,
1972                                                                 sR, sG, sB);
1973                                 if ( 1 ) {
1974                                         /* Pack RGB into 8bit pixel */
1975                                         *dst = map[((sR>>5)<<(3+2))|
1976                                                    ((sG>>5)<<(2))  |
1977                                                    ((sB>>6)<<(0))  ];
1978                                 }
1979                                 dst++;
1980                                 src += srcbpp;
1981                         }
1982 #endif /* USE_DUFFS_LOOP */
1983                         src += srcskip;
1984                         dst += dstskip;
1985                 }
1986         }
1987 }
1988
1989 /* blits 32 bit RGB<->RGBA with both surfaces having the same R,G,B fields */
1990 static void Blit4to4MaskAlpha(SDL_BlitInfo *info)
1991 {
1992         int width = info->d_width;
1993         int height = info->d_height;
1994         Uint32 *src = (Uint32 *)info->s_pixels;
1995         int srcskip = info->s_skip;
1996         Uint32 *dst = (Uint32 *)info->d_pixels;
1997         int dstskip = info->d_skip;
1998         SDL_PixelFormat *srcfmt = info->src;
1999         SDL_PixelFormat *dstfmt = info->dst;
2000
2001         if (dstfmt->Amask) {
2002                 /* RGB->RGBA, SET_ALPHA */
2003                 Uint32 mask = (srcfmt->alpha >> dstfmt->Aloss) << dstfmt->Ashift;
2004
2005                 while ( height-- ) {
2006                         DUFFS_LOOP(
2007                         {
2008                                 *dst = *src | mask;
2009                                 ++dst;
2010                                 ++src;
2011                         },
2012                         width);
2013                         src = (Uint32*)((Uint8*)src + srcskip);
2014                         dst = (Uint32*)((Uint8*)dst + dstskip);
2015                 }
2016         } else {
2017                 /* RGBA->RGB, NO_ALPHA */
2018                 Uint32 mask = srcfmt->Rmask | srcfmt->Gmask | srcfmt->Bmask;
2019
2020                 while ( height-- ) {
2021                         DUFFS_LOOP(
2022                         {
2023                                 *dst = *src & mask;
2024                                 ++dst;
2025                                 ++src;
2026                         },
2027                         width);
2028                         src = (Uint32*)((Uint8*)src + srcskip);
2029                         dst = (Uint32*)((Uint8*)dst + dstskip);
2030                 }
2031         }
2032 }
2033
2034 static void BlitNtoN(SDL_BlitInfo *info)
2035 {
2036         int width = info->d_width;
2037         int height = info->d_height;
2038         Uint8 *src = info->s_pixels;
2039         int srcskip = info->s_skip;
2040         Uint8 *dst = info->d_pixels;
2041         int dstskip = info->d_skip;
2042         SDL_PixelFormat *srcfmt = info->src;
2043         int srcbpp = srcfmt->BytesPerPixel;
2044         SDL_PixelFormat *dstfmt = info->dst;
2045         int dstbpp = dstfmt->BytesPerPixel;
2046         unsigned alpha = dstfmt->Amask ? srcfmt->alpha : 0;
2047
2048         while ( height-- ) {
2049                 DUFFS_LOOP(
2050                 {
2051                         Uint32 Pixel;
2052                         unsigned sR;
2053                         unsigned sG;
2054                         unsigned sB;
2055                         DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel, sR, sG, sB);
2056                         ASSEMBLE_RGBA(dst, dstbpp, dstfmt, sR, sG, sB, alpha);
2057                         dst += dstbpp;
2058                         src += srcbpp;
2059                 },
2060                 width);
2061                 src += srcskip;
2062                 dst += dstskip;
2063         }
2064 }
2065
2066 static void BlitNtoNCopyAlpha(SDL_BlitInfo *info)
2067 {
2068         int width = info->d_width;
2069         int height = info->d_height;
2070         Uint8 *src = info->s_pixels;
2071         int srcskip = info->s_skip;
2072         Uint8 *dst = info->d_pixels;
2073         int dstskip = info->d_skip;
2074         SDL_PixelFormat *srcfmt = info->src;
2075         int srcbpp = srcfmt->BytesPerPixel;
2076         SDL_PixelFormat *dstfmt = info->dst;
2077         int dstbpp = dstfmt->BytesPerPixel;
2078         int c;
2079
2080         /* FIXME: should map alpha to [0..255] correctly! */
2081         while ( height-- ) {
2082                 for ( c=width; c; --c ) {
2083                         Uint32 Pixel;
2084                         unsigned sR, sG, sB, sA;
2085                         DISEMBLE_RGBA(src, srcbpp, srcfmt, Pixel,
2086                                       sR, sG, sB, sA);
2087                         ASSEMBLE_RGBA(dst, dstbpp, dstfmt,
2088                                       sR, sG, sB, sA);
2089                         dst += dstbpp;
2090                         src += srcbpp;
2091                 }
2092                 src += srcskip;
2093                 dst += dstskip;
2094         }
2095 }
2096
2097 static void BlitNto1Key(SDL_BlitInfo *info)
2098 {
2099         int width = info->d_width;
2100         int height = info->d_height;
2101         Uint8 *src = info->s_pixels;
2102         int srcskip = info->s_skip;
2103         Uint8 *dst = info->d_pixels;
2104         int dstskip = info->d_skip;
2105         SDL_PixelFormat *srcfmt = info->src;
2106         const Uint8 *palmap = info->table;
2107         Uint32 ckey = srcfmt->colorkey;
2108         Uint32 rgbmask = ~srcfmt->Amask;
2109         int srcbpp;
2110         Uint32 Pixel;
2111         unsigned sR, sG, sB;
2112
2113         /* Set up some basic variables */
2114         srcbpp = srcfmt->BytesPerPixel;
2115         ckey &= rgbmask;
2116
2117         if ( palmap == NULL ) {
2118                 while ( height-- ) {
2119                         DUFFS_LOOP(
2120                         {
2121                                 DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel,
2122                                                                 sR, sG, sB);
2123                                 if ( (Pixel & rgbmask) != ckey ) {
2124                                         /* Pack RGB into 8bit pixel */
2125                                         *dst = (Uint8)(((sR>>5)<<(3+2))|
2126                                                            ((sG>>5)<<(2)) |
2127                                                            ((sB>>6)<<(0)));
2128                                 }
2129                                 dst++;
2130                                 src += srcbpp;
2131                         },
2132                         width);
2133                         src += srcskip;
2134                         dst += dstskip;
2135                 }
2136         } else {
2137                 while ( height-- ) {
2138                         DUFFS_LOOP(
2139                         {
2140                                 DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel,
2141                                                                 sR, sG, sB);
2142                                 if ( (Pixel & rgbmask) != ckey ) {
2143                                         /* Pack RGB into 8bit pixel */
2144                                         *dst = (Uint8)palmap[((sR>>5)<<(3+2))|
2145                                                                      ((sG>>5)<<(2))  |
2146                                                                      ((sB>>6)<<(0))  ];
2147                                 }
2148                                 dst++;
2149                                 src += srcbpp;
2150                         },
2151                         width);
2152                         src += srcskip;
2153                         dst += dstskip;
2154                 }
2155         }
2156 }
2157
2158 static void Blit2to2Key(SDL_BlitInfo *info)
2159 {
2160         int width = info->d_width;
2161         int height = info->d_height;
2162         Uint16 *srcp = (Uint16 *)info->s_pixels;
2163         int srcskip = info->s_skip;
2164         Uint16 *dstp = (Uint16 *)info->d_pixels;
2165         int dstskip = info->d_skip;
2166         Uint32 ckey = info->src->colorkey;
2167         Uint32 rgbmask = ~info->src->Amask;
2168
2169         /* Set up some basic variables */
2170         srcskip /= 2;
2171         dstskip /= 2;
2172         ckey &= rgbmask;
2173
2174         while ( height-- ) {
2175                 DUFFS_LOOP(
2176                 {
2177                         if ( (*srcp & rgbmask) != ckey ) {
2178                                 *dstp = *srcp;
2179                         }
2180                         dstp++;
2181                         srcp++;
2182                 },
2183                 width);
2184                 srcp += srcskip;
2185                 dstp += dstskip;
2186         }
2187 }
2188
2189 static void BlitNtoNKey(SDL_BlitInfo *info)
2190 {
2191         int width = info->d_width;
2192         int height = info->d_height;
2193         Uint8 *src = info->s_pixels;
2194         int srcskip = info->s_skip;
2195         Uint8 *dst = info->d_pixels;
2196         int dstskip = info->d_skip;
2197         Uint32 ckey = info->src->colorkey;
2198         SDL_PixelFormat *srcfmt = info->src;
2199         SDL_PixelFormat *dstfmt = info->dst;
2200         int srcbpp = srcfmt->BytesPerPixel;
2201         int dstbpp = dstfmt->BytesPerPixel;
2202         unsigned alpha = dstfmt->Amask ? srcfmt->alpha : 0;
2203         Uint32 rgbmask = ~srcfmt->Amask;
2204
2205         /* Set up some basic variables */
2206         ckey &= rgbmask;
2207
2208         while ( height-- ) {
2209                 DUFFS_LOOP(
2210                 {
2211                         Uint32 Pixel;
2212                         unsigned sR;
2213                         unsigned sG;
2214                         unsigned sB;
2215                         RETRIEVE_RGB_PIXEL(src, srcbpp, Pixel);
2216                         if ( (Pixel & rgbmask) != ckey ) {
2217                                 RGB_FROM_PIXEL(Pixel, srcfmt, sR, sG, sB);
2218                                 ASSEMBLE_RGBA(dst, dstbpp, dstfmt,
2219                                               sR, sG, sB, alpha);
2220                         }
2221                         dst += dstbpp;
2222                         src += srcbpp;
2223                 },
2224                 width);
2225                 src += srcskip;
2226                 dst += dstskip;
2227         }
2228 }
2229
2230 static void BlitNtoNKeyCopyAlpha(SDL_BlitInfo *info)
2231 {
2232         int width = info->d_width;
2233         int height = info->d_height;
2234         Uint8 *src = info->s_pixels;
2235         int srcskip = info->s_skip;
2236         Uint8 *dst = info->d_pixels;
2237         int dstskip = info->d_skip;
2238         Uint32 ckey = info->src->colorkey;
2239         SDL_PixelFormat *srcfmt = info->src;
2240         SDL_PixelFormat *dstfmt = info->dst;
2241         Uint32 rgbmask = ~srcfmt->Amask;
2242
2243         Uint8 srcbpp;
2244         Uint8 dstbpp;
2245         Uint32 Pixel;
2246         unsigned sR, sG, sB, sA;
2247
2248         /* Set up some basic variables */
2249         srcbpp = srcfmt->BytesPerPixel;
2250         dstbpp = dstfmt->BytesPerPixel;
2251         ckey &= rgbmask;
2252
2253         /* FIXME: should map alpha to [0..255] correctly! */
2254         while ( height-- ) {
2255                 DUFFS_LOOP(
2256                 {
2257                         DISEMBLE_RGBA(src, srcbpp, srcfmt, Pixel,
2258                                       sR, sG, sB, sA);
2259                         if ( (Pixel & rgbmask) != ckey ) {
2260                                   ASSEMBLE_RGBA(dst, dstbpp, dstfmt,
2261                                                 sR, sG, sB, sA);
2262                         }
2263                         dst += dstbpp;
2264                         src += srcbpp;
2265                 },
2266                 width);
2267                 src += srcskip;
2268                 dst += dstskip;
2269         }
2270 }
2271
2272 /* Normal N to N optimized blitters */
2273 struct blit_table {
2274         Uint32 srcR, srcG, srcB;
2275         int dstbpp;
2276         Uint32 dstR, dstG, dstB;
2277         Uint32 blit_features;
2278         void *aux_data;
2279         SDL_loblit blitfunc;
2280         enum { NO_ALPHA=1, SET_ALPHA=2, COPY_ALPHA=4 } alpha;
2281 };
2282 static const struct blit_table normal_blit_1[] = {
2283         /* Default for 8-bit RGB source, an invalid combination */
2284         { 0,0,0, 0, 0,0,0, 0, NULL, NULL },
2285 };
2286 static const struct blit_table normal_blit_2[] = {
2287 #if SDL_HERMES_BLITTERS
2288     { 0x0000F800,0x000007E0,0x0000001F, 2, 0x0000001F,0x000007E0,0x0000F800,
2289       0, ConvertX86p16_16BGR565, ConvertX86, NO_ALPHA },
2290     { 0x0000F800,0x000007E0,0x0000001F, 2, 0x00007C00,0x000003E0,0x0000001F,
2291       0, ConvertX86p16_16RGB555, ConvertX86, NO_ALPHA },
2292     { 0x0000F800,0x000007E0,0x0000001F, 2, 0x0000001F,0x000003E0,0x00007C00,
2293       0, ConvertX86p16_16BGR555, ConvertX86, NO_ALPHA },
2294 #elif SDL_ALTIVEC_BLITTERS
2295     /* has-altivec */
2296     { 0x0000F800,0x000007E0,0x0000001F, 4, 0x00000000,0x00000000,0x00000000,
2297       2, NULL, Blit_RGB565_32Altivec, NO_ALPHA | COPY_ALPHA | SET_ALPHA },
2298     { 0x00007C00,0x000003E0,0x0000001F, 4, 0x00000000,0x00000000,0x00000000,
2299       2, NULL, Blit_RGB555_32Altivec, NO_ALPHA | COPY_ALPHA | SET_ALPHA },
2300 #endif
2301     { 0x0000F800,0x000007E0,0x0000001F, 4, 0x00FF0000,0x0000FF00,0x000000FF,
2302       0, NULL, Blit_RGB565_ARGB8888, SET_ALPHA },
2303     { 0x0000F800,0x000007E0,0x0000001F, 4, 0x000000FF,0x0000FF00,0x00FF0000,
2304       0, NULL, Blit_RGB565_ABGR8888, SET_ALPHA },
2305     { 0x0000F800,0x000007E0,0x0000001F, 4, 0xFF000000,0x00FF0000,0x0000FF00,
2306       0, NULL, Blit_RGB565_RGBA8888, SET_ALPHA },
2307     { 0x0000F800,0x000007E0,0x0000001F, 4, 0x0000FF00,0x00FF0000,0xFF000000,
2308       0, NULL, Blit_RGB565_BGRA8888, SET_ALPHA },
2309
2310     /* Default for 16-bit RGB source, used if no other blitter matches */
2311     { 0,0,0, 0, 0,0,0, 0, NULL, BlitNtoN, 0 }
2312 };
2313 static const struct blit_table normal_blit_3[] = {
2314         /* Default for 24-bit RGB source, never optimized */
2315     { 0,0,0, 0, 0,0,0, 0, NULL, BlitNtoN, 0 }
2316 };
2317 static const struct blit_table normal_blit_4[] = {
2318 #if SDL_HERMES_BLITTERS
2319     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x0000F800,0x000007E0,0x0000001F,
2320       1, ConvertMMXpII32_16RGB565, ConvertMMX, NO_ALPHA },
2321     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x0000F800,0x000007E0,0x0000001F,
2322       0, ConvertX86p32_16RGB565, ConvertX86, NO_ALPHA },
2323     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x0000001F,0x000007E0,0x0000F800,
2324       1, ConvertMMXpII32_16BGR565, ConvertMMX, NO_ALPHA },
2325     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x0000001F,0x000007E0,0x0000F800,
2326       0, ConvertX86p32_16BGR565, ConvertX86, NO_ALPHA },
2327     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x00007C00,0x000003E0,0x0000001F,
2328       1, ConvertMMXpII32_16RGB555, ConvertMMX, NO_ALPHA },
2329     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x00007C00,0x000003E0,0x0000001F,
2330       0, ConvertX86p32_16RGB555, ConvertX86, NO_ALPHA },
2331     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x0000001F,0x000003E0,0x00007C00,
2332       1, ConvertMMXpII32_16BGR555, ConvertMMX, NO_ALPHA },
2333     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x0000001F,0x000003E0,0x00007C00,
2334       0, ConvertX86p32_16BGR555, ConvertX86, NO_ALPHA },
2335     { 0x00FF0000,0x0000FF00,0x000000FF, 3, 0x00FF0000,0x0000FF00,0x000000FF,
2336       1, ConvertMMXpII32_24RGB888, ConvertMMX, NO_ALPHA },
2337     { 0x00FF0000,0x0000FF00,0x000000FF, 3, 0x00FF0000,0x0000FF00,0x000000FF,
2338       0, ConvertX86p32_24RGB888, ConvertX86, NO_ALPHA },
2339     { 0x00FF0000,0x0000FF00,0x000000FF, 3, 0x000000FF,0x0000FF00,0x00FF0000,
2340       0, ConvertX86p32_24BGR888, ConvertX86, NO_ALPHA },
2341     { 0x00FF0000,0x0000FF00,0x000000FF, 4, 0x000000FF,0x0000FF00,0x00FF0000,
2342       0, ConvertX86p32_32BGR888, ConvertX86, NO_ALPHA },
2343     { 0x00FF0000,0x0000FF00,0x000000FF, 4, 0xFF000000,0x00FF0000,0x0000FF00,
2344       0, ConvertX86p32_32RGBA888, ConvertX86, NO_ALPHA },
2345     { 0x00FF0000,0x0000FF00,0x000000FF, 4, 0x0000FF00,0x00FF0000,0xFF000000,
2346       0, ConvertX86p32_32BGRA888, ConvertX86, NO_ALPHA },
2347 #else
2348 #if SDL_ALTIVEC_BLITTERS
2349     /* has-altivec | dont-use-prefetch */
2350     { 0x00000000,0x00000000,0x00000000, 4, 0x00000000,0x00000000,0x00000000,
2351       6, NULL, ConvertAltivec32to32_noprefetch, NO_ALPHA | COPY_ALPHA | SET_ALPHA },
2352     /* has-altivec */
2353     { 0x00000000,0x00000000,0x00000000, 4, 0x00000000,0x00000000,0x00000000,
2354       2, NULL, ConvertAltivec32to32_prefetch, NO_ALPHA | COPY_ALPHA | SET_ALPHA },
2355     /* has-altivec */
2356     { 0x00000000,0x00000000,0x00000000, 2, 0x0000F800,0x000007E0,0x0000001F,
2357       2, NULL, Blit_RGB888_RGB565Altivec, NO_ALPHA },
2358 #endif
2359     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x0000F800,0x000007E0,0x0000001F,
2360       0, NULL, Blit_RGB888_RGB565, NO_ALPHA },
2361     { 0x00FF0000,0x0000FF00,0x000000FF, 2, 0x00007C00,0x000003E0,0x0000001F,
2362       0, NULL, Blit_RGB888_RGB555, NO_ALPHA },
2363 #endif
2364         /* Default for 32-bit RGB source, used if no other blitter matches */
2365         { 0,0,0, 0, 0,0,0, 0, NULL, BlitNtoN, 0 }
2366 };
2367 static const struct blit_table *normal_blit[] = {
2368         normal_blit_1, normal_blit_2, normal_blit_3, normal_blit_4
2369 };
2370
2371 /* Mask matches table, or table entry is zero */
2372 #define MASKOK(x, y) (((x) == (y)) || ((y) == 0x00000000))
2373
2374 SDL_loblit SDL_CalculateBlitN(SDL_Surface *surface, int blit_index)
2375 {
2376         struct private_swaccel *sdata;
2377         SDL_PixelFormat *srcfmt;
2378         SDL_PixelFormat *dstfmt;
2379         const struct blit_table *table;
2380         int which;
2381         SDL_loblit blitfun;
2382
2383         /* Set up data for choosing the blit */
2384         sdata = surface->map->sw_data;
2385         srcfmt = surface->format;
2386         dstfmt = surface->map->dst->format;
2387
2388         if ( blit_index & 2 ) {
2389                 /* alpha or alpha+colorkey */
2390                 return SDL_CalculateAlphaBlit(surface, blit_index);
2391         }
2392
2393         /* We don't support destinations less than 8-bits */
2394         if ( dstfmt->BitsPerPixel < 8 ) {
2395                 return(NULL);
2396         }
2397
2398         if(blit_index == 1) {
2399             /* colorkey blit: Here we don't have too many options, mostly
2400                because RLE is the preferred fast way to deal with this.
2401                If a particular case turns out to be useful we'll add it. */
2402
2403             if(srcfmt->BytesPerPixel == 2
2404                && surface->map->identity)
2405                 return Blit2to2Key;
2406             else if(dstfmt->BytesPerPixel == 1)
2407                 return BlitNto1Key;
2408             else {
2409 #if SDL_ALTIVEC_BLITTERS
2410         if((srcfmt->BytesPerPixel == 4) && (dstfmt->BytesPerPixel == 4) && SDL_HasAltiVec()) {
2411             return Blit32to32KeyAltivec;
2412         } else
2413 #endif
2414
2415                 if(srcfmt->Amask && dstfmt->Amask)
2416                     return BlitNtoNKeyCopyAlpha;
2417                 else
2418                     return BlitNtoNKey;
2419             }
2420         }
2421
2422         blitfun = NULL;
2423         if ( dstfmt->BitsPerPixel == 8 ) {
2424                 /* We assume 8-bit destinations are palettized */
2425                 if ( (srcfmt->BytesPerPixel == 4) &&
2426                      (srcfmt->Rmask == 0x00FF0000) &&
2427                      (srcfmt->Gmask == 0x0000FF00) &&
2428                      (srcfmt->Bmask == 0x000000FF) ) {
2429                         if ( surface->map->table ) {
2430                                 blitfun = Blit_RGB888_index8_map;
2431                         } else {
2432 #if SDL_HERMES_BLITTERS
2433                                 sdata->aux_data = ConvertX86p32_8RGB332;
2434                                 blitfun = ConvertX86;
2435 #else
2436                                 blitfun = Blit_RGB888_index8;
2437 #endif
2438                         }
2439                 } else {
2440                         blitfun = BlitNto1;
2441                 }
2442         } else {
2443                 /* Now the meat, choose the blitter we want */
2444                 int a_need = NO_ALPHA;
2445                 if(dstfmt->Amask)
2446                     a_need = srcfmt->Amask ? COPY_ALPHA : SET_ALPHA;
2447                 table = normal_blit[srcfmt->BytesPerPixel-1];
2448                 for ( which=0; table[which].dstbpp; ++which ) {
2449                         if ( MASKOK(srcfmt->Rmask, table[which].srcR) &&
2450                             MASKOK(srcfmt->Gmask, table[which].srcG) &&
2451                             MASKOK(srcfmt->Bmask, table[which].srcB) &&
2452                             MASKOK(dstfmt->Rmask, table[which].dstR) &&
2453                             MASKOK(dstfmt->Gmask, table[which].dstG) &&
2454                             MASKOK(dstfmt->Bmask, table[which].dstB) &&
2455                             dstfmt->BytesPerPixel == table[which].dstbpp &&
2456                             (a_need & table[which].alpha) == a_need &&
2457                             ((table[which].blit_features & GetBlitFeatures()) == table[which].blit_features) )
2458                                 break;
2459                 }
2460                 sdata->aux_data = table[which].aux_data;
2461                 blitfun = table[which].blitfunc;
2462
2463                 if(blitfun == BlitNtoN) {  /* default C fallback catch-all. Slow! */
2464                         /* Fastpath C fallback: 32bit RGB<->RGBA blit with matching RGB */
2465                         if ( srcfmt->BytesPerPixel == 4 && dstfmt->BytesPerPixel == 4 &&
2466                              srcfmt->Rmask == dstfmt->Rmask &&
2467                              srcfmt->Gmask == dstfmt->Gmask &&
2468                              srcfmt->Bmask == dstfmt->Bmask ) {
2469                                 blitfun = Blit4to4MaskAlpha;
2470                         } else if ( a_need == COPY_ALPHA ) {
2471                             blitfun = BlitNtoNCopyAlpha;
2472                         }
2473                 }
2474         }
2475
2476 #ifdef DEBUG_ASM
2477 #if SDL_HERMES_BLITTERS
2478         if ( blitfun == ConvertMMX )
2479                 fprintf(stderr, "Using mmx blit\n");
2480         else
2481         if ( blitfun == ConvertX86 )
2482                 fprintf(stderr, "Using asm blit\n");
2483         else
2484 #endif
2485         if ( (blitfun == BlitNtoN) || (blitfun == BlitNto1) )
2486                 fprintf(stderr, "Using C blit\n");
2487         else
2488                 fprintf(stderr, "Using optimized C blit\n");
2489 #endif /* DEBUG_ASM */
2490
2491         return(blitfun);
2492 }