| 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_blit.h" |
| 26 | #include "SDL_fb3dfx.h" |
| 27 | #include "3dfx_mmio.h" |
| 28 | |
| 29 | |
| 30 | /* Wait for vertical retrace */ |
| 31 | static void WaitVBL(_THIS) |
| 32 | { |
| 33 | /* find start of retrace */ |
| 34 | tdfx_waitidle(); |
| 35 | while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE ) |
| 36 | ; |
| 37 | /* wait until we're past the start */ |
| 38 | while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0 ) |
| 39 | ; |
| 40 | } |
| 41 | static void WaitIdle(_THIS) |
| 42 | { |
| 43 | tdfx_waitidle(); |
| 44 | } |
| 45 | |
| 46 | /* Sets video mem colorkey and accelerated blit function */ |
| 47 | static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key) |
| 48 | { |
| 49 | return(0); |
| 50 | } |
| 51 | |
| 52 | static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color) |
| 53 | { |
| 54 | int bpp; |
| 55 | Uint32 dst_base; |
| 56 | Uint32 format; |
| 57 | int dstX, dstY; |
| 58 | |
| 59 | /* Don't blit to the display surface when switched away */ |
| 60 | if ( switched_away ) { |
| 61 | return -2; /* no hardware access */ |
| 62 | } |
| 63 | if ( dst == this->screen ) { |
| 64 | SDL_mutexP(hw_lock); |
| 65 | } |
| 66 | |
| 67 | /* Set the destination pixel format */ |
| 68 | dst_base = ((char *)dst->pixels - mapped_mem); |
| 69 | bpp = dst->format->BitsPerPixel; |
| 70 | format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); |
| 71 | |
| 72 | /* Calculate source and destination base coordinates */ |
| 73 | dstX = rect->x; |
| 74 | dstY = rect->y; |
| 75 | |
| 76 | /* Execute the fill command */ |
| 77 | tdfx_wait(6); |
| 78 | tdfx_out32(DSTBASE, dst_base); |
| 79 | tdfx_out32(DSTFORMAT, format); |
| 80 | tdfx_out32(COLORFORE, color); |
| 81 | tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT); |
| 82 | tdfx_out32(DSTSIZE, rect->w | (rect->h << 16)); |
| 83 | tdfx_out32(LAUNCH_2D, dstX | (dstY << 16)); |
| 84 | |
| 85 | FB_AddBusySurface(dst); |
| 86 | |
| 87 | if ( dst == this->screen ) { |
| 88 | SDL_mutexV(hw_lock); |
| 89 | } |
| 90 | return(0); |
| 91 | } |
| 92 | |
| 93 | static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect, |
| 94 | SDL_Surface *dst, SDL_Rect *dstrect) |
| 95 | { |
| 96 | SDL_VideoDevice *this = current_video; |
| 97 | int bpp; |
| 98 | Uint32 src_format; |
| 99 | Uint32 dst_format; |
| 100 | Uint32 src_base; |
| 101 | Uint32 dst_base; |
| 102 | int srcX, srcY; |
| 103 | int dstX, dstY; |
| 104 | Uint32 blitop; |
| 105 | Uint32 use_colorkey; |
| 106 | |
| 107 | /* Don't blit to the display surface when switched away */ |
| 108 | if ( switched_away ) { |
| 109 | return -2; /* no hardware access */ |
| 110 | } |
| 111 | if ( dst == this->screen ) { |
| 112 | SDL_mutexP(hw_lock); |
| 113 | } |
| 114 | |
| 115 | /* Set the source and destination pixel format */ |
| 116 | src_base = ((char *)src->pixels - mapped_mem); |
| 117 | bpp = src->format->BitsPerPixel; |
| 118 | src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); |
| 119 | dst_base = ((char *)dst->pixels - mapped_mem); |
| 120 | bpp = dst->format->BitsPerPixel; |
| 121 | dst_format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); |
| 122 | |
| 123 | srcX = srcrect->x; |
| 124 | srcY = srcrect->y; |
| 125 | dstX = dstrect->x; |
| 126 | dstY = dstrect->y; |
| 127 | |
| 128 | /* Assemble the blit operation */ |
| 129 | blitop = COMMAND_2D_BITBLT | (0xCC << 24); |
| 130 | if ( srcX <= dstX ) { |
| 131 | blitop |= BIT(14); |
| 132 | srcX += (dstrect->w - 1); |
| 133 | dstX += (dstrect->w - 1); |
| 134 | } |
| 135 | if ( srcY <= dstY ) { |
| 136 | blitop |= BIT(15); |
| 137 | srcY += (dstrect->h - 1); |
| 138 | dstY += (dstrect->h - 1); |
| 139 | } |
| 140 | |
| 141 | /* Perform the blit! */ |
| 142 | if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
| 143 | tdfx_wait(3); |
| 144 | tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey); |
| 145 | tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey); |
| 146 | tdfx_out32(ROP_2D, 0xAA00); |
| 147 | use_colorkey = 1; |
| 148 | } else { |
| 149 | use_colorkey = 0; |
| 150 | } |
| 151 | tdfx_wait(9); |
| 152 | tdfx_out32(SRCBASE, (Uint32)src_base); |
| 153 | tdfx_out32(SRCFORMAT, src_format); |
| 154 | tdfx_out32(DSTBASE, (Uint32)dst_base); |
| 155 | tdfx_out32(DSTFORMAT, src_format); |
| 156 | tdfx_out32(COMMAND_2D, blitop); |
| 157 | tdfx_out32(COMMANDEXTRA_2D, use_colorkey); |
| 158 | tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16)); |
| 159 | tdfx_out32(DSTXY, dstX | (dstY << 16)); |
| 160 | tdfx_out32(LAUNCH_2D, srcX | (srcY << 16)); |
| 161 | |
| 162 | FB_AddBusySurface(src); |
| 163 | FB_AddBusySurface(dst); |
| 164 | |
| 165 | if ( dst == this->screen ) { |
| 166 | SDL_mutexV(hw_lock); |
| 167 | } |
| 168 | return(0); |
| 169 | } |
| 170 | |
| 171 | static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst) |
| 172 | { |
| 173 | int accelerated; |
| 174 | |
| 175 | /* Set initial acceleration on */ |
| 176 | src->flags |= SDL_HWACCEL; |
| 177 | |
| 178 | /* Set the surface attributes */ |
| 179 | if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
| 180 | if ( ! this->info.blit_hw_A ) { |
| 181 | src->flags &= ~SDL_HWACCEL; |
| 182 | } |
| 183 | } |
| 184 | if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
| 185 | if ( ! this->info.blit_hw_CC ) { |
| 186 | src->flags &= ~SDL_HWACCEL; |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | /* Check to see if final surface blit is accelerated */ |
| 191 | accelerated = !!(src->flags & SDL_HWACCEL); |
| 192 | if ( accelerated ) { |
| 193 | src->map->hw_blit = HWAccelBlit; |
| 194 | } |
| 195 | return(accelerated); |
| 196 | } |
| 197 | |
| 198 | void FB_3DfxAccel(_THIS, __u32 card) |
| 199 | { |
| 200 | /* We have hardware accelerated surface functions */ |
| 201 | this->CheckHWBlit = CheckHWBlit; |
| 202 | wait_vbl = WaitVBL; |
| 203 | wait_idle = WaitIdle; |
| 204 | |
| 205 | /* Reset the 3Dfx controller */ |
| 206 | tdfx_out32(BRESERROR0, 0); |
| 207 | tdfx_out32(BRESERROR1, 0); |
| 208 | |
| 209 | /* The 3Dfx has an accelerated color fill */ |
| 210 | this->info.blit_fill = 1; |
| 211 | this->FillHWRect = FillHWRect; |
| 212 | |
| 213 | /* The 3Dfx has accelerated normal and colorkey blits */ |
| 214 | this->info.blit_hw = 1; |
| 215 | this->info.blit_hw_CC = 1; |
| 216 | this->SetHWColorKey = SetHWColorKey; |
| 217 | } |