plugins/gpu_unai/gpu_raster_line.h

   1 /***************************************************************************
   2 *   Copyright (C) 2010 PCSX4ALL Team                                      *
   3 *   Copyright (C) 2010 Unai                                               *
   4 *                                                                         *
   5 *   This program is free software; you can redistribute it and/or modify  *
   6 *   it under the terms of the GNU General Public License as published by  *
   7 *   the Free Software Foundation; either version 2 of the License, or     *
   8 *   (at your option) any later version.                                   *
   9 *                                                                         *
  10 *   This program 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         *
  13 *   GNU General Public License for more details.                          *
  14 *                                                                         *
  15 *   You should have received a copy of the GNU General Public License     *
  16 *   along with this program; if not, write to the                         *
  17 *   Free Software Foundation, Inc.,                                       *
  18 *   51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA.           *
  19 ***************************************************************************/
  20
  21 ///////////////////////////////////////////////////////////////////////////////
  22 //  GPU internal line drawing functions
  23
  24 #define GPU_DIGITS  16
  25 #define GPU_DIGITSC (GPU_DIGITS+3)
  26
  27 INLINE long GPU_DIV(long rs, long rt)
  28 {
  29         return rt ? (rs / rt) : (0);
  30 }
  31
  32 ///////////////////////////////////////////////////////////////////////////////
  33 void gpuDrawLF(const PD gpuPixelDriver)
  34 {
  35         s32 temp;
  36         s32 xmin, xmax;
  37         s32 ymin, ymax;
  38         s32 x0, x1, dx;
  39         s32 y0, y1, dy;
  40
  41         x0 = PacketBuffer.S2[2] + DrawingOffset[0];     GPU_TESTRANGE(x0);
  42         y0 = PacketBuffer.S2[3] + DrawingOffset[1];     GPU_TESTRANGE(y0);
  43         x1 = PacketBuffer.S2[4] + DrawingOffset[0];     GPU_TESTRANGE(x1);
  44         y1 = PacketBuffer.S2[5] + DrawingOffset[1];     GPU_TESTRANGE(y1);
  45
  46         xmin = DrawingArea[0];  xmax = DrawingArea[2];
  47         ymin = DrawingArea[1];  ymax = DrawingArea[3];
  48         const u16 pixeldata = GPU_RGB16(PacketBuffer.U4[0]);
  49
  50         dy = (y1 - y0);
  51         if (dy < 0) dy = -dy;
  52         dx = (x1 - x0);
  53         if (dx < 0) dx = -dx;
  54         if (dx > dy) {
  55                 if (x0 > x1) {
  56                         GPU_SWAP(x0, x1, temp);
  57                         GPU_SWAP(y0, y1, temp);
  58                 }
  59                 y1 = GPU_DIV((y1 - y0) << GPU_DIGITS, dx);
  60                 y0 <<= GPU_DIGITS;
  61                 temp = xmin - x0;
  62                 if (temp > 0) {
  63                         x0 = xmin;
  64                         y0 += (y1 * temp);
  65                 }
  66                 if (x1 > xmax) x1 = xmax;
  67                 x1 -= x0;
  68                 if (x1 < 0) x1 = 0;
  69
  70                 const int li=linesInterlace;
  71                 for (; x1; x1--) {
  72                         temp = y0 >> GPU_DIGITS;
  73                         if( 0 == (temp&li) )  {
  74                                 if ((u32) (temp - ymin) < (u32) (ymax - ymin)) {
  75                                         gpuPixelDriver(&((u16*)GPU_FrameBuffer)[FRAME_OFFSET(x0, temp)],pixeldata);
  76                                 }
  77                         }
  78                         x0++;
  79                         y0 += y1;
  80                 }
  81         } else if (dy) {
  82                 if (y0 > y1) {
  83                         GPU_SWAP(x0, x1, temp);
  84                         GPU_SWAP(y0, y1, temp);
  85                 }
  86                 x1 = GPU_DIV((x1 - x0) << GPU_DIGITS, dy);
  87                 x0 <<= GPU_DIGITS;
  88                 temp = ymin - y0;
  89                 if (temp > 0) {
  90                         y0 = ymin;
  91                         x0 += (x1 * temp);
  92                 }
  93                 if (y1 > ymax) y1 = ymax;
  94                 y1 -= y0;
  95                 if (y1 < 0) y1 = 0;
  96
  97                 const int li=linesInterlace;
  98                 for (; y1; y1--) {
  99                         if( 0 == (y0&li) )  {
 100                                 temp = x0 >> GPU_DIGITS;
 101                                 if ((u32) (temp - xmin) < (u32) (xmax - xmin)) {
 102                                         gpuPixelDriver(&((u16*)GPU_FrameBuffer)[FRAME_OFFSET(temp, y0)],pixeldata);
 103                                 }
 104                         }
 105                         y0++;
 106                         x0 += x1;
 107                 }
 108
 109         } else {
 110                 if( 0 == (y0&linesInterlace) )  {
 111                         if ((u32) (x0 - xmin) < (u32) (xmax - xmin)) {
 112                                 if ((u32) (y0 - ymin) < (u32) (ymax - ymin)) {
 113                                         gpuPixelDriver(&((u16*)GPU_FrameBuffer)[FRAME_OFFSET(x0, y0)],pixeldata);
 114                                 }
 115                         }
 116                 }
 117         }
 118 }
 119
 120 /*----------------------------------------------------------------------
 121 GF
 122 ----------------------------------------------------------------------*/
 123
 124 ///////////////////////////////////////////////////////////////////////////////
 125 void gpuDrawLG(const PD gpuPixelDriver)
 126 {
 127         s32 temp;
 128         s32 xmin, xmax;
 129         s32 ymin, ymax;
 130         s32 x0, x1, dx;
 131         s32 y0, y1, dy;
 132         s32 r0, r1;
 133         s32 g0, g1;
 134         s32 b0, b1;
 135
 136         x0 = PacketBuffer.S2[2] + DrawingOffset[0];     GPU_TESTRANGE(x0);
 137         y0 = PacketBuffer.S2[3] + DrawingOffset[1];     GPU_TESTRANGE(y0);
 138         x1 = PacketBuffer.S2[6] + DrawingOffset[0];     GPU_TESTRANGE(x1);
 139         y1 = PacketBuffer.S2[7] + DrawingOffset[1];     GPU_TESTRANGE(y1);
 140
 141         r0 = PacketBuffer.U1[0];  g0 = PacketBuffer.U1[1];  b0 = PacketBuffer.U1[2];
 142         r1 = PacketBuffer.U1[8];  g1 = PacketBuffer.U1[9];      b1 = PacketBuffer.U1[10];
 143
 144         xmin = DrawingArea[0];  xmax = DrawingArea[2];
 145         ymin = DrawingArea[1];  ymax = DrawingArea[3];
 146
 147         dy = (y1 - y0);
 148         if (dy < 0)
 149         dy = -dy;
 150         dx = (x1 - x0);
 151         if (dx < 0)
 152         dx = -dx;
 153         if (dx > dy) {
 154                 if (x0 > x1) {
 155                         GPU_SWAP(x0, x1, temp);
 156                         GPU_SWAP(y0, y1, temp);
 157                         GPU_SWAP(r0, r1, temp);
 158                         GPU_SWAP(g0, g1, temp);
 159                         GPU_SWAP(b0, b1, temp);
 160                 }
 161                 y1 = GPU_DIV((y1 - y0) << GPU_DIGITS, dx);
 162                 r1 = GPU_DIV((r1 - r0) << GPU_DIGITS, dx);
 163                 g1 = GPU_DIV((g1 - g0) << GPU_DIGITS, dx);
 164                 b1 = GPU_DIV((b1 - b0) << GPU_DIGITS, dx);
 165                 y0 <<= GPU_DIGITS;
 166                 r0 <<= GPU_DIGITS;
 167                 g0 <<= GPU_DIGITS;
 168                 b0 <<= GPU_DIGITS;
 169                 temp = xmin - x0;
 170                 if (temp > 0) {
 171                         x0 = xmin;
 172                         y0 += (y1 * temp);
 173                         r0 += (r1 * temp);
 174                         g0 += (g1 * temp);
 175                         b0 += (b1 * temp);
 176                 }
 177                 if (x1 > xmax) x1 = xmax;
 178                 x1 -= x0;
 179                 if (x1 < 0) x1 = 0;
 180
 181                 const int li=linesInterlace;
 182                 for (; x1; x1--) {
 183                         temp = y0 >> GPU_DIGITS;
 184                         if( 0 == (temp&li) )  {
 185                                 if ((u32) (temp - ymin) < (u32) (ymax - ymin)) {
 186                                         gpuPixelDriver (
 187                                                 &((u16*)GPU_FrameBuffer)[FRAME_OFFSET(x0, temp)],
 188                                                 (((b0>>GPU_DIGITSC)&0x1F)<<10) | (((g0>>GPU_DIGITSC)&0x1F)<< 5) | ((r0>>GPU_DIGITSC)&0x1F)
 189                                         );
 190                                 }
 191                         }
 192                         x0++;
 193                         y0 += y1;
 194                         r0 += r1;
 195                         g0 += g1;
 196                         b0 += b1;
 197                 }
 198         } else if (dy) {
 199                 if (y0 > y1) {
 200                         GPU_SWAP(x0, x1, temp);
 201                         GPU_SWAP(y0, y1, temp);
 202                         GPU_SWAP(r0, r1, temp);
 203                         GPU_SWAP(g0, g1, temp);
 204                         GPU_SWAP(b0, b1, temp);
 205                 }
 206                 x1 = GPU_DIV((x1 - x0) << GPU_DIGITS, dy);
 207                 r1 = GPU_DIV((r1 - r0) << GPU_DIGITS, dy);
 208                 g1 = GPU_DIV((g1 - g0) << GPU_DIGITS, dy);
 209                 b1 = GPU_DIV((b1 - b0) << GPU_DIGITS, dy);
 210                 x0 <<= GPU_DIGITS;
 211                 r0 <<= GPU_DIGITS;
 212                 g0 <<= GPU_DIGITS;
 213                 b0 <<= GPU_DIGITS;
 214                 temp = ymin - y0;
 215                 if (temp > 0) {
 216                         y0 = ymin;
 217                         x0 += (x1 * temp);
 218                         r0 += (r1 * temp);
 219                         g0 += (g1 * temp);
 220                         b0 += (b1 * temp);
 221                 }
 222                 if (y1 > ymax) y1 = ymax;
 223                 y1 -= y0;
 224                 if (y1 < 0) y1 = 0;
 225
 226                 const int li=linesInterlace;
 227                 for (; y1; y1--) {
 228                         if( 0 == (y0&li) )  {
 229                                 temp = x0 >> GPU_DIGITS;
 230                                 if ((u32) (temp - xmin) < (u32) (xmax - xmin)) {
 231                                         gpuPixelDriver (
 232                                                 &((u16*)GPU_FrameBuffer)[FRAME_OFFSET(temp, y0)],
 233                                                 (((b0>>GPU_DIGITSC)&0x1F)<<10) | (((g0>>GPU_DIGITSC)&0x1F)<< 5) | ((r0>>GPU_DIGITSC)&0x1F)
 234                                         );
 235                                 }
 236                         }
 237                         y0++;
 238                         x0 += x1;
 239                         r0 += r1;
 240                         g0 += g1;
 241                         b0 += b1;
 242                 }
 243         } else {
 244                 if( 0 == (y0&linesInterlace) )  {
 245                         if ((u32) (x0 - xmin) < (u32) (xmax - xmin)) {
 246                                 if ((u32) (y0 - ymin) < (u32) (ymax - ymin)) {
 247                                         gpuPixelDriver (
 248                                                 &((u16*)GPU_FrameBuffer)[FRAME_OFFSET(x0, y0)],
 249                                                 (((b0>>GPU_DIGITSC)&0x1F)<<10) | (((g0>>GPU_DIGITSC)&0x1F)<< 5) | ((r0>>GPU_DIGITSC)&0x1F)
 250                                         );
 251                                 }
 252                         }
 253                 }
 254         }
 255 }