3 #include "dpsoftrast.h"
10 typedef enum bool {false, true} bool;
13 #if defined(__GNUC__) || (defined(_MSC_VER) && _MSC_VER >= 1400)
14 #define RESTRICT __restrict
20 #define GL_FRONT_LEFT 0x0400
21 #define GL_FRONT_RIGHT 0x0401
22 #define GL_BACK_LEFT 0x0402
23 #define GL_BACK_RIGHT 0x0403
24 #define GL_FRONT 0x0404
25 #define GL_BACK 0x0405
26 #define GL_LEFT 0x0406
27 #define GL_RIGHT 0x0407
28 #define GL_FRONT_AND_BACK 0x0408
29 #define GL_AUX0 0x0409
30 #define GL_AUX1 0x040A
31 #define GL_AUX2 0x040B
32 #define GL_AUX3 0x040C
34 #define GL_NEVER 0x0200
35 #define GL_LESS 0x0201
36 #define GL_EQUAL 0x0202
37 #define GL_LEQUAL 0x0203
38 #define GL_GREATER 0x0204
39 #define GL_NOTEQUAL 0x0205
40 #define GL_GEQUAL 0x0206
41 #define GL_ALWAYS 0x0207
45 #define GL_SRC_COLOR 0x0300
46 #define GL_ONE_MINUS_SRC_COLOR 0x0301
47 #define GL_DST_COLOR 0x0306
48 #define GL_ONE_MINUS_DST_COLOR 0x0307
49 #define GL_SRC_ALPHA 0x0302
50 #define GL_ONE_MINUS_SRC_ALPHA 0x0303
51 #define GL_DST_ALPHA 0x0304
52 #define GL_ONE_MINUS_DST_ALPHA 0x0305
53 #define GL_SRC_ALPHA_SATURATE 0x0308
54 #define GL_CONSTANT_COLOR 0x8001
55 #define GL_ONE_MINUS_CONSTANT_COLOR 0x8002
56 #define GL_CONSTANT_ALPHA 0x8003
57 #define GL_ONE_MINUS_CONSTANT_ALPHA 0x8004
59 typedef enum DPSOFTRAST_ARRAY_e
61 DPSOFTRAST_ARRAY_POSITION,
62 DPSOFTRAST_ARRAY_COLOR,
63 DPSOFTRAST_ARRAY_TEXCOORD0,
64 DPSOFTRAST_ARRAY_TEXCOORD1,
65 DPSOFTRAST_ARRAY_TEXCOORD2,
66 DPSOFTRAST_ARRAY_TEXCOORD3,
67 DPSOFTRAST_ARRAY_TEXCOORD4,
68 DPSOFTRAST_ARRAY_TEXCOORD5,
69 DPSOFTRAST_ARRAY_TEXCOORD6,
70 DPSOFTRAST_ARRAY_TEXCOORD7,
71 DPSOFTRAST_ARRAY_TOTAL
75 typedef struct DPSOFTRAST_Texture_s
82 DPSOFTRAST_TEXTURE_FILTER filter;
86 int mipmap[DPSOFTRAST_MAXMIPMAPS][5];
90 typedef struct DPSOFTRAST_State_User_s
106 float polygonoffset[2];
109 DPSOFTRAST_State_User;
111 #define DPSOFTRAST_MAXSUBSPAN 16
113 typedef struct DPSOFTRAST_State_Draw_Span_s
115 int start; // pixel index
116 int length; // pixel count
117 int startx; // usable range (according to pixelmask)
118 int endx; // usable range (according to pixelmask)
119 unsigned char mip[DPSOFTRAST_MAXTEXTUREUNITS]; // texcoord to screen space density values (for picking mipmap of textures)
120 unsigned char *pixelmask; // true for pixels that passed depth test, false for others
121 // [0][n][] is start interpolant values (projected)
122 // [1][n][] is end interpolant values (projected)
123 // [0][DPSOFTRAST_ARRAY_TOTAL][] is start screencoord4f
124 // [1][DPSOFTRAST_ARRAY_TOTAL][] is end screencoord4f
125 // NOTE: screencoord4f[3] is W (basically 1/Z), useful for depthbuffer
126 float data[2][DPSOFTRAST_ARRAY_TOTAL+1][4];
128 DPSOFTRAST_State_Draw_Span;
130 #define DPSOFTRAST_DRAW_MAXSPANQUEUE 1024
132 typedef struct DPSOFTRAST_State_Draw_s
136 float *in_array4f[DPSOFTRAST_ARRAY_TOTAL];
137 float *post_array4f[DPSOFTRAST_ARRAY_TOTAL];
138 float *screencoord4f;
140 // spans are queued in this structure for dispatch to the pixel shader,
141 // partly to improve cache locality, partly for batching purposes, spans
142 // are flushed before DrawTriangles returns to caller
144 DPSOFTRAST_State_Draw_Span spanqueue[DPSOFTRAST_DRAW_MAXSPANQUEUE];
146 DPSOFTRAST_State_Draw;
148 #define DPSOFTRAST_VALIDATE_FB 1
149 #define DPSOFTRAST_VALIDATE_DEPTHFUNC 2
150 #define DPSOFTRAST_VALIDATE_BLENDFUNC 4
151 #define DPSOFTRAST_VALIDATE_DRAW (DPSOFTRAST_VALIDATE_FB | DPSOFTRAST_VALIDATE_DEPTHFUNC | DPSOFTRAST_VALIDATE_BLENDFUNC)
153 typedef enum DPSOFTRAST_BLENDMODE_e
155 DPSOFTRAST_BLENDMODE_OPAQUE,
156 DPSOFTRAST_BLENDMODE_ALPHA,
157 DPSOFTRAST_BLENDMODE_ADDALPHA,
158 DPSOFTRAST_BLENDMODE_ADD,
159 DPSOFTRAST_BLENDMODE_INVMOD,
160 DPSOFTRAST_BLENDMODE_MUL,
161 DPSOFTRAST_BLENDMODE_MUL2,
162 DPSOFTRAST_BLENDMODE_SUBALPHA,
163 DPSOFTRAST_BLENDMODE_PSEUDOALPHA,
164 DPSOFTRAST_BLENDMODE_TOTAL
166 DPSOFTRAST_BLENDMODE;
168 typedef struct DPSOFTRAST_State_s
170 // DPSOFTRAST_VALIDATE_ flags
176 unsigned int *fb_depthpixels;
177 unsigned int *fb_colorpixels[4];
179 const float *pointer_vertex3f;
180 const float *pointer_color4f;
181 const unsigned char *pointer_color4ub;
182 const float *pointer_texcoordf[DPSOFTRAST_MAXTEXCOORDARRAYS];
185 int stride_texcoord[DPSOFTRAST_MAXTEXCOORDARRAYS];
186 int components_texcoord[DPSOFTRAST_MAXTEXCOORDARRAYS];
187 DPSOFTRAST_Texture *texbound[DPSOFTRAST_MAXTEXTUREUNITS];
190 int shader_permutation;
191 float uniform4f[DPSOFTRAST_UNIFORM_TOTAL*4];
192 int uniform1i[DPSOFTRAST_UNIFORM_TOTAL];
194 // derived values (DPSOFTRAST_VALIDATE_FB)
195 int fb_clearscissor[4];
197 int fb_viewportscissor[4];
198 float fb_viewportcenter[2];
199 float fb_viewportscale[2];
201 // derived values (DPSOFTRAST_VALIDATE_DEPTHFUNC)
204 // derived values (DPSOFTRAST_VALIDATE_BLENDFUNC)
209 int texture_firstfree;
210 DPSOFTRAST_Texture *texture;
215 const char *errorstring;
217 DPSOFTRAST_State_User user;
219 DPSOFTRAST_State_Draw draw;
223 DPSOFTRAST_State dpsoftrast;
225 #define DPSOFTRAST_DEPTHSCALE (1024.0f*1048576.0f)
226 #define DPSOFTRAST_BGRA8_FROM_RGBA32F(r,g,b,a) (((int)(r * 255.0f + 0.5f) << 16) | ((int)(g * 255.0f + 0.5f) << 8) | (int)(b * 255.0f + 0.5f) | ((int)(a * 255.0f + 0.5f) << 24))
227 #define DPSOFTRAST_DEPTH32_FROM_DEPTH32F(d) ((int)(DPSOFTRAST_DEPTHSCALE * (1-d)))
228 #define DPSOFTRAST_DRAW_MAXSPANLENGTH 256
230 void DPSOFTRAST_RecalcFB(void)
232 // calculate framebuffer scissor, viewport, viewport clipped by scissor,
233 // and viewport projection values
234 int x1, x2, x3, x4, x5, x6;
235 int y1, y2, y3, y4, y5, y6;
236 x1 = dpsoftrast.user.scissor[0];
237 x2 = dpsoftrast.user.scissor[0] + dpsoftrast.user.scissor[2];
238 x3 = dpsoftrast.user.viewport[0];
239 x4 = dpsoftrast.user.viewport[0] + dpsoftrast.user.viewport[2];
240 y1 = dpsoftrast.fb_height - dpsoftrast.user.scissor[1] - dpsoftrast.user.scissor[3];
241 y2 = dpsoftrast.fb_height - dpsoftrast.user.scissor[1];
242 y3 = dpsoftrast.fb_height - dpsoftrast.user.viewport[1] - dpsoftrast.user.viewport[3];
243 y4 = dpsoftrast.fb_height - dpsoftrast.user.viewport[1];
244 if (!dpsoftrast.user.scissortest) {x1 = 0;y1 = 0;x2 = dpsoftrast.fb_width;y2 = dpsoftrast.fb_height;}
246 if (x2 > dpsoftrast.fb_width) x2 = dpsoftrast.fb_width;
248 if (x4 > dpsoftrast.fb_width) x4 = dpsoftrast.fb_width;
250 if (y2 > dpsoftrast.fb_height) y2 = dpsoftrast.fb_height;
252 if (y4 > dpsoftrast.fb_height) y4 = dpsoftrast.fb_height;
253 x5 = x1;if (x5 < x3) x5 = x3;
254 x6 = x2;if (x6 > x4) x4 = x4;
255 y5 = y1;if (y5 < y3) y5 = y3;
256 y6 = y2;if (y6 > y4) y6 = y4;
257 dpsoftrast.fb_clearscissor[0] = x1;
258 dpsoftrast.fb_clearscissor[1] = y1;
259 dpsoftrast.fb_clearscissor[2] = x2 - x1;
260 dpsoftrast.fb_clearscissor[3] = y2 - y1;
261 dpsoftrast.fb_viewport[0] = x3;
262 dpsoftrast.fb_viewport[1] = y3;
263 dpsoftrast.fb_viewport[2] = x4 - x3;
264 dpsoftrast.fb_viewport[3] = y4 - y3;
265 dpsoftrast.fb_viewportscissor[0] = x5;
266 dpsoftrast.fb_viewportscissor[1] = y5;
267 dpsoftrast.fb_viewportscissor[2] = x6 - x5;
268 dpsoftrast.fb_viewportscissor[3] = y6 - y5;
269 dpsoftrast.fb_viewportcenter[0] = dpsoftrast.user.viewport[0] + 0.5f * dpsoftrast.user.viewport[2] - 0.5f;
270 dpsoftrast.fb_viewportcenter[1] = dpsoftrast.fb_height - dpsoftrast.user.viewport[1] - 0.5f * dpsoftrast.user.viewport[3] - 0.5f;
271 dpsoftrast.fb_viewportscale[0] = 0.5f * dpsoftrast.user.viewport[2];
272 dpsoftrast.fb_viewportscale[1] = -0.5f * dpsoftrast.user.viewport[3];
275 void DPSOFTRAST_RecalcDepthFunc(void)
277 dpsoftrast.fb_depthfunc = dpsoftrast.user.depthtest ? dpsoftrast.user.depthfunc : GL_ALWAYS;
280 int blendmodetable[][4] =
282 {DPSOFTRAST_BLENDMODE_OPAQUE, GL_ONE, GL_ZERO, false},
283 {DPSOFTRAST_BLENDMODE_ALPHA, GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, false},
284 {DPSOFTRAST_BLENDMODE_ADDALPHA, GL_SRC_ALPHA, GL_ONE, false},
285 {DPSOFTRAST_BLENDMODE_ADD, GL_ONE, GL_ONE, false},
286 {DPSOFTRAST_BLENDMODE_INVMOD, GL_ZERO, GL_ONE_MINUS_SRC_COLOR, false},
287 {DPSOFTRAST_BLENDMODE_MUL, GL_ZERO, GL_SRC_COLOR, false},
288 {DPSOFTRAST_BLENDMODE_MUL, GL_DST_COLOR, GL_ZERO, false},
289 {DPSOFTRAST_BLENDMODE_MUL2, GL_DST_COLOR, GL_SRC_COLOR, false},
290 {DPSOFTRAST_BLENDMODE_PSEUDOALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA, false},
291 {DPSOFTRAST_BLENDMODE_SUBALPHA, GL_SRC_COLOR, GL_ONE, true}
294 void DPSOFTRAST_RecalcBlendFunc(void)
297 dpsoftrast.fb_blendmode = DPSOFTRAST_BLENDMODE_OPAQUE;
298 for (i = 0;i < (int)(sizeof(blendmodetable) / sizeof(blendmodetable[0]));i++)
300 if (dpsoftrast.user.blendfunc[0] == blendmodetable[i][1] && dpsoftrast.user.blendfunc[1] == blendmodetable[i][2] && dpsoftrast.user.blendsubtract == blendmodetable[i][3])
302 dpsoftrast.fb_blendmode = blendmodetable[i][0];
308 #define DPSOFTRAST_ValidateQuick(f) ((dpsoftrast.validate & (f)) ? (DPSOFTRAST_Validate(f), 0) : 0)
310 void DPSOFTRAST_Validate(int mask)
312 mask &= dpsoftrast.validate;
315 if (mask & DPSOFTRAST_VALIDATE_FB)
317 dpsoftrast.validate &= ~DPSOFTRAST_VALIDATE_FB;
318 DPSOFTRAST_RecalcFB();
320 if (mask & DPSOFTRAST_VALIDATE_DEPTHFUNC)
322 dpsoftrast.validate &= ~DPSOFTRAST_VALIDATE_DEPTHFUNC;
323 DPSOFTRAST_RecalcDepthFunc();
325 if (mask & DPSOFTRAST_VALIDATE_BLENDFUNC)
327 dpsoftrast.validate &= ~DPSOFTRAST_VALIDATE_BLENDFUNC;
328 DPSOFTRAST_RecalcBlendFunc();
332 DPSOFTRAST_Texture *DPSOFTRAST_Texture_GetByIndex(int index)
334 if (index >= 1 && index < dpsoftrast.texture_end && dpsoftrast.texture[index].bytes)
335 return &dpsoftrast.texture[index];
339 int DPSOFTRAST_Texture_New(int flags, int width, int height, int depth)
348 int sides = (flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP) ? 6 : 1;
349 int texformat = flags & DPSOFTRAST_TEXTURE_FORMAT_COMPAREMASK;
350 DPSOFTRAST_Texture *texture;
351 if (width*height*depth < 1)
353 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: width, height or depth is less than 1";
356 if (width > DPSOFTRAST_TEXTURE_MAXSIZE || height > DPSOFTRAST_TEXTURE_MAXSIZE || depth > DPSOFTRAST_TEXTURE_MAXSIZE)
358 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: texture size is too large";
363 case DPSOFTRAST_TEXTURE_FORMAT_BGRA8:
364 case DPSOFTRAST_TEXTURE_FORMAT_RGBA8:
365 case DPSOFTRAST_TEXTURE_FORMAT_ALPHA8:
367 case DPSOFTRAST_TEXTURE_FORMAT_DEPTH:
368 if (flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP)
370 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FORMAT_DEPTH only permitted on 2D textures";
375 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FORMAT_DEPTH only permitted on 2D textures";
378 if ((flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP) && (texformat == DPSOFTRAST_TEXTURE_FORMAT_DEPTH))
380 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FORMAT_DEPTH does not permit mipmaps";
385 if (depth != 1 && (flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP))
387 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_CUBEMAP can not be used on 3D textures";
390 if (depth != 1 && (flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
392 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_MIPMAP can not be used on 3D textures";
395 if (depth != 1 && (flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
397 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_MIPMAP can not be used on 3D textures";
400 if ((flags & DPSOFTRAST_TEXTURE_FLAG_CUBEMAP) && (flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
402 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: DPSOFTRAST_TEXTURE_FLAG_MIPMAP can not be used on cubemap textures";
405 if ((width & (width-1)) || (height & (height-1)) || (depth & (depth-1)))
407 dpsoftrast.errorstring = "DPSOFTRAST_Texture_New: dimensions are not power of two";
410 // find first empty slot in texture array
411 for (texnum = dpsoftrast.texture_firstfree;texnum < dpsoftrast.texture_end;texnum++)
412 if (!dpsoftrast.texture[texnum].bytes)
414 dpsoftrast.texture_firstfree = texnum + 1;
415 if (dpsoftrast.texture_max <= texnum)
417 // expand texture array as needed
418 if (dpsoftrast.texture_max < 1024)
419 dpsoftrast.texture_max = 1024;
421 dpsoftrast.texture_max *= 2;
422 dpsoftrast.texture = (DPSOFTRAST_Texture *)realloc(dpsoftrast.texture, dpsoftrast.texture_max * sizeof(DPSOFTRAST_Texture));
424 if (dpsoftrast.texture_end <= texnum)
425 dpsoftrast.texture_end = texnum + 1;
426 texture = &dpsoftrast.texture[texnum];
427 memset(texture, 0, sizeof(*texture));
428 texture->flags = flags;
429 texture->width = width;
430 texture->height = height;
431 texture->depth = depth;
432 texture->sides = sides;
443 s = w * h * d * sides * 4;
444 texture->mipmap[mipmaps][0] = size;
445 texture->mipmap[mipmaps][1] = s;
446 texture->mipmap[mipmaps][2] = w;
447 texture->mipmap[mipmaps][3] = h;
448 texture->mipmap[mipmaps][4] = d;
451 if (w * h * d == 1 || !(flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP))
457 texture->mipmaps = mipmaps;
458 texture->size = size;
460 // allocate the pixels now
461 texture->bytes = calloc(1, size);
465 void DPSOFTRAST_Texture_Free(int index)
467 DPSOFTRAST_Texture *texture;
468 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
470 free(texture->bytes);
471 texture->bytes = NULL;
472 memset(texture, 0, sizeof(*texture));
473 // adjust the free range and used range
474 if (dpsoftrast.texture_firstfree > index)
475 dpsoftrast.texture_firstfree = index;
476 while (dpsoftrast.texture_end > 0 && dpsoftrast.texture[dpsoftrast.texture_end-1].bytes == NULL)
477 dpsoftrast.texture_end--;
479 void DPSOFTRAST_Texture_CalculateMipmaps(int index)
481 int i, x, y, z, w, layer0, layer1, row0, row1;
482 unsigned char *o, *i0, *i1, *i2, *i3;
483 DPSOFTRAST_Texture *texture;
484 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
485 if (texture->mipmaps <= 1)
487 for (i = 1;i < texture->mipmaps;i++)
489 for (z = 0;z < texture->mipmap[i][4];z++)
493 if (layer1 >= texture->mipmap[i-1][4])
494 layer1 = texture->mipmap[i-1][4]-1;
495 for (y = 0;y < texture->mipmap[i][3];y++)
499 if (row1 >= texture->mipmap[i-1][3])
500 row1 = texture->mipmap[i-1][3]-1;
501 o = texture->bytes + texture->mipmap[i ][0] + 4*((texture->mipmap[i ][3] * z + y ) * texture->mipmap[i ][2]);
502 i0 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer0 + row0) * texture->mipmap[i-1][2]);
503 i1 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer0 + row1) * texture->mipmap[i-1][2]);
504 i2 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer1 + row0) * texture->mipmap[i-1][2]);
505 i3 = texture->bytes + texture->mipmap[i-1][0] + 4*((texture->mipmap[i-1][3] * layer1 + row1) * texture->mipmap[i-1][2]);
506 w = texture->mipmap[i][2];
509 if (texture->mipmap[i-1][2] > 1)
511 // average 3D texture
512 for (x = 0;x < w;x++, o += 4, i0 += 8, i1 += 8, i2 += 8, i3 += 8)
514 o[0] = (i0[0] + i0[4] + i1[0] + i1[4] + i2[0] + i2[4] + i3[0] + i3[4] + 4) >> 3;
515 o[1] = (i0[1] + i0[5] + i1[1] + i1[5] + i2[1] + i2[5] + i3[1] + i3[5] + 4) >> 3;
516 o[2] = (i0[2] + i0[6] + i1[2] + i1[6] + i2[2] + i2[6] + i3[2] + i3[6] + 4) >> 3;
517 o[3] = (i0[3] + i0[7] + i1[3] + i1[7] + i2[3] + i2[7] + i3[3] + i3[7] + 4) >> 3;
522 // average 3D mipmap with parent width == 1
523 for (x = 0;x < w;x++, o += 4, i0 += 8, i1 += 8)
525 o[0] = (i0[0] + i1[0] + i2[0] + i3[0] + 2) >> 2;
526 o[1] = (i0[1] + i1[1] + i2[1] + i3[1] + 2) >> 2;
527 o[2] = (i0[2] + i1[2] + i2[2] + i3[2] + 2) >> 2;
528 o[3] = (i0[3] + i1[3] + i2[3] + i3[3] + 2) >> 2;
534 if (texture->mipmap[i-1][2] > 1)
536 // average 2D texture (common case)
537 for (x = 0;x < w;x++, o += 4, i0 += 8, i1 += 8)
539 o[0] = (i0[0] + i0[4] + i1[0] + i1[4] + 2) >> 2;
540 o[1] = (i0[1] + i0[5] + i1[1] + i1[5] + 2) >> 2;
541 o[2] = (i0[2] + i0[6] + i1[2] + i1[6] + 2) >> 2;
542 o[3] = (i0[3] + i0[7] + i1[3] + i1[7] + 2) >> 2;
547 // 2D texture with parent width == 1
548 o[0] = (i0[0] + i1[0] + 1) >> 1;
549 o[1] = (i0[1] + i1[1] + 1) >> 1;
550 o[2] = (i0[2] + i1[2] + 1) >> 1;
551 o[3] = (i0[3] + i1[3] + 1) >> 1;
558 void DPSOFTRAST_Texture_UpdatePartial(int index, int mip, const unsigned char *pixels, int blockx, int blocky, int blockwidth, int blockheight)
560 DPSOFTRAST_Texture *texture;
561 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
565 dpsoftrast.errorstring = "DPSOFTRAST_Texture_UpdatePartial: Not implemented.";
567 void DPSOFTRAST_Texture_UpdateFull(int index, const unsigned char *pixels)
569 DPSOFTRAST_Texture *texture;
570 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
572 memcpy(texture->bytes, pixels, texture->mipmap[0][1]);
573 DPSOFTRAST_Texture_CalculateMipmaps(index);
575 int DPSOFTRAST_Texture_GetWidth(int index, int mip)
577 DPSOFTRAST_Texture *texture;
578 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
579 return texture->width;
581 int DPSOFTRAST_Texture_GetHeight(int index, int mip)
583 DPSOFTRAST_Texture *texture;
584 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
585 return texture->height;
587 int DPSOFTRAST_Texture_GetDepth(int index, int mip)
589 DPSOFTRAST_Texture *texture;
590 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
591 return texture->depth;
593 unsigned char *DPSOFTRAST_Texture_GetPixelPointer(int index, int mip)
595 DPSOFTRAST_Texture *texture;
596 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return 0;
597 return texture->bytes;
599 void DPSOFTRAST_Texture_Filter(int index, DPSOFTRAST_TEXTURE_FILTER filter)
601 DPSOFTRAST_Texture *texture;
602 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
603 if (!(texture->flags & DPSOFTRAST_TEXTURE_FLAG_MIPMAP) && filter > DPSOFTRAST_TEXTURE_FILTER_LINEAR)
605 dpsoftrast.errorstring = "DPSOFTRAST_Texture_Filter: requested filter mode requires mipmaps";
608 texture->filter = filter;
611 void DPSOFTRAST_SetRenderTargets(int width, int height, unsigned int *depthpixels, unsigned int *colorpixels0, unsigned int *colorpixels1, unsigned int *colorpixels2, unsigned int *colorpixels3)
613 dpsoftrast.fb_width = width;
614 dpsoftrast.fb_height = height;
615 dpsoftrast.fb_depthpixels = depthpixels;
616 dpsoftrast.fb_colorpixels[0] = colorpixels0;
617 dpsoftrast.fb_colorpixels[1] = colorpixels1;
618 dpsoftrast.fb_colorpixels[2] = colorpixels2;
619 dpsoftrast.fb_colorpixels[3] = colorpixels3;
621 void DPSOFTRAST_Viewport(int x, int y, int width, int height)
623 dpsoftrast.user.viewport[0] = x;
624 dpsoftrast.user.viewport[1] = y;
625 dpsoftrast.user.viewport[2] = width;
626 dpsoftrast.user.viewport[3] = height;
627 dpsoftrast.validate |= DPSOFTRAST_VALIDATE_FB;
629 void DPSOFTRAST_ClearColor(float r, float g, float b, float a)
631 int i, x1, y1, x2, y2, w, h, x, y;
634 DPSOFTRAST_Validate(DPSOFTRAST_VALIDATE_FB);
635 x1 = dpsoftrast.fb_clearscissor[0];
636 y1 = dpsoftrast.fb_clearscissor[1];
637 x2 = dpsoftrast.fb_clearscissor[2];
638 y2 = dpsoftrast.fb_clearscissor[1] + dpsoftrast.fb_clearscissor[3];
643 // FIXME: honor dpsoftrast.fb_colormask?
644 c = DPSOFTRAST_BGRA8_FROM_RGBA32F(r,g,b,a);
645 for (i = 0;i < 4;i++)
647 if (!dpsoftrast.fb_colorpixels[i])
649 for (y = y1;y < y2;y++)
651 p = dpsoftrast.fb_colorpixels[i] + y * dpsoftrast.fb_width;
652 for (x = x1;x < x2;x++)
657 void DPSOFTRAST_ClearDepth(float d)
659 int x1, y1, x2, y2, w, h, x, y;
662 DPSOFTRAST_Validate(DPSOFTRAST_VALIDATE_FB);
663 x1 = dpsoftrast.fb_clearscissor[0];
664 y1 = dpsoftrast.fb_clearscissor[1];
665 x2 = dpsoftrast.fb_clearscissor[2];
666 y2 = dpsoftrast.fb_clearscissor[1] + dpsoftrast.fb_clearscissor[3];
671 c = DPSOFTRAST_DEPTH32_FROM_DEPTH32F(d);
672 for (y = y1;y < y2;y++)
674 p = dpsoftrast.fb_depthpixels + y * dpsoftrast.fb_width;
675 for (x = x1;x < x2;x++)
679 void DPSOFTRAST_ColorMask(int r, int g, int b, int a)
681 dpsoftrast.user.colormask[0] = r != 0;
682 dpsoftrast.user.colormask[1] = g != 0;
683 dpsoftrast.user.colormask[2] = b != 0;
684 dpsoftrast.user.colormask[3] = a != 0;
685 dpsoftrast.fb_colormask = ((-dpsoftrast.user.colormask[0]) & 0x00FF0000) | ((-dpsoftrast.user.colormask[1]) & 0x0000FF00) | ((-dpsoftrast.user.colormask[2]) & 0x000000FF) | ((-dpsoftrast.user.colormask[3]) & 0xFF000000);
687 void DPSOFTRAST_DepthTest(int enable)
689 dpsoftrast.user.depthtest = enable;
690 dpsoftrast.validate |= DPSOFTRAST_VALIDATE_DEPTHFUNC;
692 void DPSOFTRAST_ScissorTest(int enable)
694 dpsoftrast.user.scissortest = enable;
695 dpsoftrast.validate |= DPSOFTRAST_VALIDATE_FB;
697 void DPSOFTRAST_Scissor(float x, float y, float width, float height)
699 dpsoftrast.user.scissor[0] = x;
700 dpsoftrast.user.scissor[1] = y;
701 dpsoftrast.user.scissor[2] = width;
702 dpsoftrast.user.scissor[3] = height;
703 dpsoftrast.validate |= DPSOFTRAST_VALIDATE_FB;
706 void DPSOFTRAST_BlendFunc(int smodulate, int dmodulate)
709 dpsoftrast.user.blendfunc[0] = smodulate;
710 dpsoftrast.user.blendfunc[1] = dmodulate;
711 dpsoftrast.validate |= DPSOFTRAST_VALIDATE_BLENDFUNC;
713 void DPSOFTRAST_BlendSubtract(int enable)
715 dpsoftrast.user.blendsubtract = enable != 0;
716 dpsoftrast.validate |= DPSOFTRAST_VALIDATE_BLENDFUNC;
718 void DPSOFTRAST_DepthMask(int enable)
720 dpsoftrast.user.depthmask = enable;
722 void DPSOFTRAST_DepthFunc(int comparemode)
725 dpsoftrast.user.depthfunc = comparemode;
727 void DPSOFTRAST_DepthRange(float range0, float range1)
729 dpsoftrast.user.depthrange[0] = range0;
730 dpsoftrast.user.depthrange[1] = range1;
732 void DPSOFTRAST_PolygonOffset(float alongnormal, float intoview)
734 dpsoftrast.user.polygonoffset[0] = alongnormal;
735 dpsoftrast.user.polygonoffset[1] = intoview;
737 void DPSOFTRAST_CullFace(int mode)
740 dpsoftrast.user.cullface = mode;
742 void DPSOFTRAST_AlphaTest(float enable)
744 dpsoftrast.user.alphatest = enable;
746 void DPSOFTRAST_AlphaFunc(int alphafunc, float alphavalue)
749 dpsoftrast.user.alphafunc = alphafunc;
750 dpsoftrast.user.alphavalue = alphavalue;
752 void DPSOFTRAST_Color4f(float r, float g, float b, float a)
754 dpsoftrast.user.color[0] = r;
755 dpsoftrast.user.color[1] = g;
756 dpsoftrast.user.color[2] = b;
757 dpsoftrast.user.color[3] = a;
759 void DPSOFTRAST_GetPixelsBGRA(int blockx, int blocky, int blockwidth, int blockheight, unsigned char *outpixels)
761 int outstride = blockwidth * 4;
762 int instride = dpsoftrast.fb_width * 4;
765 int bx2 = blockx + blockwidth;
766 int by2 = blocky + blockheight;
771 unsigned char *inpixels;
774 if (bx1 < 0) bx1 = 0;
775 if (by1 < 0) by1 = 0;
776 if (bx2 > dpsoftrast.fb_width) bx2 = dpsoftrast.fb_width;
777 if (by2 > dpsoftrast.fb_height) by2 = dpsoftrast.fb_height;
780 inpixels = (unsigned char *)dpsoftrast.fb_colorpixels[0];
781 if (dpsoftrast.bigendian)
783 for (y = by1;y < by2;y++)
785 b = (unsigned char *)inpixels + (dpsoftrast.fb_height - 1 - y) * instride + 4 * bx1;
786 o = (unsigned char *)outpixels + (y - by1) * outstride;
787 for (x = bx1;x < bx2;x++)
800 for (y = by1;y < by2;y++)
802 b = (unsigned char *)inpixels + (dpsoftrast.fb_height - 1 - y) * instride + 4 * bx1;
803 o = (unsigned char *)outpixels + (y - by1) * outstride;
809 void DPSOFTRAST_CopyRectangleToTexture(int index, int mip, int tx, int ty, int sx, int sy, int width, int height)
813 int tx2 = tx + width;
814 int ty2 = ty + height;
817 int sx2 = sx + width;
818 int sy2 = sy + height;
828 unsigned int *spixels;
829 unsigned int *tpixels;
830 DPSOFTRAST_Texture *texture;
831 texture = DPSOFTRAST_Texture_GetByIndex(index);if (!texture) return;
832 if (mip < 0 || mip >= texture->mipmaps) return;
833 spixels = dpsoftrast.fb_colorpixels[0];
834 swidth = dpsoftrast.fb_width;
835 sheight = dpsoftrast.fb_height;
836 tpixels = (unsigned int *)(texture->bytes + texture->mipmap[mip][0]);
837 twidth = texture->mipmap[mip][2];
838 theight = texture->mipmap[mip][3];
839 if (tx1 < 0) tx1 = 0;
840 if (ty1 < 0) ty1 = 0;
841 if (tx2 > twidth) tx2 = twidth;
842 if (ty2 > theight) ty2 = theight;
843 if (sx1 < 0) sx1 = 0;
844 if (sy1 < 0) sy1 = 0;
845 if (sx2 > swidth) sx2 = swidth;
846 if (sy2 > sheight) sy2 = sheight;
851 if (tw > sw) tw = sw;
852 if (th > sh) th = sh;
853 if (tw < 1 || th < 1)
855 for (y = 0;y < th;y++)
856 memcpy(tpixels + ((ty1 + y) * twidth + tx1), spixels + ((sy1 + y) * swidth + sx1), tw*4);
857 if (texture->mipmaps > 1)
858 DPSOFTRAST_Texture_CalculateMipmaps(index);
860 void DPSOFTRAST_SetTexture(int unitnum, int index)
862 DPSOFTRAST_Texture *texture;
863 if (unitnum < 0 || unitnum >= DPSOFTRAST_MAXTEXTUREUNITS)
865 dpsoftrast.errorstring = "DPSOFTRAST_SetTexture: invalid unit number";
868 texture = DPSOFTRAST_Texture_GetByIndex(index);
869 if (index && !texture)
871 dpsoftrast.errorstring = "DPSOFTRAST_SetTexture: invalid texture handle";
874 dpsoftrast.texbound[unitnum] = texture;
877 void DPSOFTRAST_SetVertexPointer(const float *vertex3f, size_t stride)
879 dpsoftrast.pointer_vertex3f = vertex3f;
880 dpsoftrast.stride_vertex = stride;
882 void DPSOFTRAST_SetColorPointer(const float *color4f, size_t stride)
884 dpsoftrast.pointer_color4f = color4f;
885 dpsoftrast.pointer_color4ub = NULL;
886 dpsoftrast.stride_color = stride;
888 void DPSOFTRAST_SetColorPointer4ub(const unsigned char *color4ub, size_t stride)
890 dpsoftrast.pointer_color4f = NULL;
891 dpsoftrast.pointer_color4ub = color4ub;
892 dpsoftrast.stride_color = stride;
894 void DPSOFTRAST_SetTexCoordPointer(int unitnum, int numcomponents, size_t stride, const float *texcoordf)
896 dpsoftrast.pointer_texcoordf[unitnum] = texcoordf;
897 dpsoftrast.components_texcoord[unitnum] = numcomponents;
898 dpsoftrast.stride_texcoord[unitnum] = stride;
901 void DPSOFTRAST_SetShader(unsigned int mode, unsigned int permutation)
903 dpsoftrast.shader_mode = mode;
904 dpsoftrast.shader_permutation = permutation;
906 void DPSOFTRAST_Uniform4fARB(DPSOFTRAST_UNIFORM index, float v0, float v1, float v2, float v3)
908 dpsoftrast.uniform4f[index*4+0] = v0;
909 dpsoftrast.uniform4f[index*4+1] = v1;
910 dpsoftrast.uniform4f[index*4+2] = v2;
911 dpsoftrast.uniform4f[index*4+3] = v3;
913 void DPSOFTRAST_Uniform4fvARB(DPSOFTRAST_UNIFORM index, const float *v)
915 dpsoftrast.uniform4f[index*4+0] = v[0];
916 dpsoftrast.uniform4f[index*4+1] = v[1];
917 dpsoftrast.uniform4f[index*4+2] = v[2];
918 dpsoftrast.uniform4f[index*4+3] = v[3];
920 void DPSOFTRAST_UniformMatrix4fvARB(DPSOFTRAST_UNIFORM index, int arraysize, int transpose, const float *v)
922 dpsoftrast.uniform4f[index*4+0] = v[0];
923 dpsoftrast.uniform4f[index*4+1] = v[1];
924 dpsoftrast.uniform4f[index*4+2] = v[2];
925 dpsoftrast.uniform4f[index*4+3] = v[3];
926 dpsoftrast.uniform4f[index*4+4] = v[4];
927 dpsoftrast.uniform4f[index*4+5] = v[5];
928 dpsoftrast.uniform4f[index*4+6] = v[6];
929 dpsoftrast.uniform4f[index*4+7] = v[7];
930 dpsoftrast.uniform4f[index*4+8] = v[8];
931 dpsoftrast.uniform4f[index*4+9] = v[9];
932 dpsoftrast.uniform4f[index*4+10] = v[10];
933 dpsoftrast.uniform4f[index*4+11] = v[11];
934 dpsoftrast.uniform4f[index*4+12] = v[12];
935 dpsoftrast.uniform4f[index*4+13] = v[13];
936 dpsoftrast.uniform4f[index*4+14] = v[14];
937 dpsoftrast.uniform4f[index*4+15] = v[15];
939 void DPSOFTRAST_Uniform1iARB(DPSOFTRAST_UNIFORM index, int i0)
941 dpsoftrast.uniform1i[index] = i0;
944 void DPSOFTRAST_Draw_LoadVertices(int firstvertex, int numvertices, bool needcolors)
952 const unsigned char *b;
953 dpsoftrast.draw.numvertices = numvertices;
954 if (dpsoftrast.draw.maxvertices < dpsoftrast.draw.numvertices)
956 if (dpsoftrast.draw.maxvertices < 4096)
957 dpsoftrast.draw.maxvertices = 4096;
958 while (dpsoftrast.draw.maxvertices < dpsoftrast.draw.numvertices)
959 dpsoftrast.draw.maxvertices *= 2;
960 if (dpsoftrast.draw.in_array4f[0])
961 free(dpsoftrast.draw.in_array4f[0]);
962 data = calloc(1, dpsoftrast.draw.maxvertices * sizeof(float[4])*(DPSOFTRAST_ARRAY_TOTAL*2 + 1));
963 for (i = 0;i < DPSOFTRAST_ARRAY_TOTAL;i++, data += dpsoftrast.draw.maxvertices * 4)
964 dpsoftrast.draw.in_array4f[i] = data;
965 for (i = 0;i < DPSOFTRAST_ARRAY_TOTAL;i++, data += dpsoftrast.draw.maxvertices * 4)
966 dpsoftrast.draw.post_array4f[i] = data;
967 dpsoftrast.draw.screencoord4f = data;
968 data += dpsoftrast.draw.maxvertices * 4;
970 stride = dpsoftrast.stride_vertex;
971 v = (const float *)((unsigned char *)dpsoftrast.pointer_vertex3f + firstvertex * stride);
972 p = dpsoftrast.draw.in_array4f[0];
973 for (i = 0;i < numvertices;i++)
980 v = (const float *)((const unsigned char *)v + stride);
984 if (dpsoftrast.pointer_color4f)
986 stride = dpsoftrast.stride_color;
987 v = (const float *)((const unsigned char *)dpsoftrast.pointer_color4f + firstvertex * stride);
988 p = dpsoftrast.draw.in_array4f[1];
989 for (i = 0;i < numvertices;i++)
996 v = (const float *)((const unsigned char *)v + stride);
999 else if (dpsoftrast.pointer_color4ub)
1001 stride = dpsoftrast.stride_color;
1002 b = (const unsigned char *)((const unsigned char *)dpsoftrast.pointer_color4ub + firstvertex * stride);
1003 p = dpsoftrast.draw.in_array4f[1];
1004 for (i = 0;i < numvertices;i++)
1006 p[0] = b[0] * (1.0f / 255.0f);
1007 p[1] = b[1] * (1.0f / 255.0f);
1008 p[2] = b[2] * (1.0f / 255.0f);
1009 p[3] = b[3] * (1.0f / 255.0f);
1011 b = (const unsigned char *)((const unsigned char *)b + stride);
1016 v = dpsoftrast.user.color;
1017 p = dpsoftrast.draw.in_array4f[1];
1018 for (i = 0;i < numvertices;i++)
1028 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL-2;j++)
1030 if (dpsoftrast.pointer_texcoordf[j])
1032 stride = dpsoftrast.stride_texcoord[j];
1033 v = (const float *)((const unsigned char *)dpsoftrast.pointer_texcoordf[j] + firstvertex * stride);
1034 p = dpsoftrast.draw.in_array4f[j+2];
1035 switch(dpsoftrast.components_texcoord[j])
1038 for (i = 0;i < numvertices;i++)
1045 v = (const float *)((const unsigned char *)v + stride);
1049 for (i = 0;i < numvertices;i++)
1056 v = (const float *)((const unsigned char *)v + stride);
1060 for (i = 0;i < numvertices;i++)
1067 v = (const float *)((const unsigned char *)v + stride);
1075 void DPSOFTRAST_Array_Transform(float *out4f, const float *in4f, int numitems, const float *inmatrix16f)
1080 memcpy(matrix, inmatrix16f, sizeof(float[16]));
1081 for (i = 0;i < numitems;i++, out4f += 4, in4f += 4)
1083 out4f[0] = in4f[0] * matrix[0][0] + in4f[1] * matrix[1][0] + in4f[2] * matrix[2][0] + in4f[3] * matrix[3][0];
1084 out4f[1] = in4f[0] * matrix[0][1] + in4f[1] * matrix[1][1] + in4f[2] * matrix[2][1] + in4f[3] * matrix[3][1];
1085 out4f[2] = in4f[0] * matrix[0][2] + in4f[1] * matrix[1][2] + in4f[2] * matrix[2][2] + in4f[3] * matrix[3][2];
1086 out4f[3] = in4f[0] * matrix[0][3] + in4f[1] * matrix[1][3] + in4f[2] * matrix[2][3] + in4f[3] * matrix[3][3];
1090 void DPSOFTRAST_Array_Copy(float *out4f, const float *in4f, int numitems)
1092 memcpy(out4f, in4f, numitems * sizeof(float[4]));
1095 void DPSOFTRAST_Draw_ProjectVertices(float *out4f, const float *in4f, int numitems)
1097 // NOTE: this is used both as a whole mesh transform function and a
1098 // per-triangle transform function (for clipped triangles), accordingly
1099 // it should not crash on divide by 0 but the result of divide by 0 is
1104 float viewportcenter[4];
1105 float viewportscale[4];
1106 viewportscale[0] = dpsoftrast.fb_viewportscale[0];
1107 viewportscale[1] = dpsoftrast.fb_viewportscale[1];
1108 viewportscale[2] = 0.5f;
1109 viewportscale[3] = 0.0f;
1110 viewportcenter[0] = dpsoftrast.fb_viewportcenter[0];
1111 viewportcenter[1] = dpsoftrast.fb_viewportcenter[1];
1112 viewportcenter[2] = 0.5f;
1113 viewportcenter[3] = 0.0f;
1114 for (i = 0;i < numitems;i++)
1125 out4f[0] = viewportcenter[0] + viewportscale[0] * in4f[0] * w;
1126 out4f[1] = viewportcenter[1] + viewportscale[1] * in4f[1] * w;
1127 out4f[2] = viewportcenter[2] + viewportscale[2] * in4f[2] * w;
1128 out4f[3] = viewportcenter[3] + viewportscale[3] * in4f[3] * w;
1135 void DPSOFTRAST_Draw_DebugEdgePoints(const float *screen0, const float *screen1)
1140 int w = dpsoftrast.fb_width;
1143 unsigned int *pixels = dpsoftrast.fb_colorpixels[0];
1145 bounds[0] = dpsoftrast.fb_viewportscissor[0];
1146 bounds[1] = dpsoftrast.fb_viewportscissor[1];
1147 bounds[2] = dpsoftrast.fb_viewportscissor[0] + dpsoftrast.fb_viewportscissor[2];
1148 bounds[3] = dpsoftrast.fb_viewportscissor[1] + dpsoftrast.fb_viewportscissor[3];
1153 for (i = 0;i <= 128;i++)
1156 //if (dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+3] != 1.0f)
1158 x = (int)(v0[0] + (v1[0] - v0[0]) * (i/128.0f));
1159 y = (int)(v0[1] + (v1[1] - v0[1]) * (i/128.0f));
1160 if (x < bounds[0] || y < bounds[1] || x >= bounds[2] || y >= bounds[3])
1162 //c4f = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_COLOR] + element0*4;
1163 //pixels[y*w+x] = DPSOFTRAST_BGRA8_FROM_RGBA32F(c4f[0], c4f[1], c4f[2], c4f[3]);
1164 pixels[y*w+x] = 0xFFFFFFFF;
1168 void DPSOFTRAST_Draw_VertexShaderLightDirection(void)
1172 void DPSOFTRAST_Draw_Span_Begin(const DPSOFTRAST_State_Draw_Span *span, float *zf)
1175 int startx = span->startx;
1176 int endx = span->endx;
1177 float w = span->data[0][DPSOFTRAST_ARRAY_TOTAL][3];
1178 float wslope = span->data[1][DPSOFTRAST_ARRAY_TOTAL][3];
1179 for (x = startx;x < endx;)
1181 int endsub = x + DPSOFTRAST_MAXSUBSPAN-1;
1182 float z = 1.0f / (w + wslope * x), dz;
1186 dz = endsub > x ? (1.0f / (w + wslope * endsub) - z) / (endsub - x) : 0.0f;
1190 dz = (1.0f / (w + wslope * endsub) - z) * (1.0f / (DPSOFTRAST_MAXSUBSPAN-1));
1192 for (; x <= endsub; x++, z += dz)
1197 void DPSOFTRAST_Draw_Span_Finish(const DPSOFTRAST_State_Draw_Span *span, const float * RESTRICT in4f)
1200 int startx = span->startx;
1201 int endx = span->endx;
1204 unsigned char * RESTRICT pixelmask = span->pixelmask;
1205 unsigned char * RESTRICT pixel = (unsigned char *)dpsoftrast.fb_colorpixels[0];
1208 pixel += span->start * 4;
1209 // handle alphatest now (this affects depth writes too)
1210 if (dpsoftrast.user.alphatest)
1211 for (x = startx;x < endx;x++)
1212 if (in4f[x*4+3] < 0.5f)
1213 pixelmask[x] = false;
1214 // FIXME: this does not handle bigendian
1215 switch(dpsoftrast.fb_blendmode)
1217 case DPSOFTRAST_BLENDMODE_OPAQUE:
1218 for (x = startx;x < endx;x++)
1222 d[0] = (int)(in4f[x*4+2]*255.0f);if (d[0] > 255) d[0] = 255;
1223 d[1] = (int)(in4f[x*4+1]*255.0f);if (d[1] > 255) d[1] = 255;
1224 d[2] = (int)(in4f[x*4+0]*255.0f);if (d[2] > 255) d[2] = 255;
1225 d[3] = (int)(in4f[x*4+3]*255.0f);if (d[3] > 255) d[3] = 255;
1226 pixel[x*4+0] = d[0];
1227 pixel[x*4+1] = d[1];
1228 pixel[x*4+2] = d[2];
1229 pixel[x*4+3] = d[3];
1232 case DPSOFTRAST_BLENDMODE_ALPHA:
1233 for (x = startx;x < endx;x++)
1237 a = in4f[x*4+3] * 255.0f;
1238 b = 1.0f - in4f[x*4+3];
1239 d[0] = (int)(in4f[x*4+2]*a+pixel[x*4+0]*b);if (d[0] > 255) d[0] = 255;
1240 d[1] = (int)(in4f[x*4+1]*a+pixel[x*4+1]*b);if (d[1] > 255) d[1] = 255;
1241 d[2] = (int)(in4f[x*4+0]*a+pixel[x*4+2]*b);if (d[2] > 255) d[2] = 255;
1242 d[3] = (int)(in4f[x*4+3]*a+pixel[x*4+3]*b);if (d[3] > 255) d[3] = 255;
1243 pixel[x*4+0] = d[0];
1244 pixel[x*4+1] = d[1];
1245 pixel[x*4+2] = d[2];
1246 pixel[x*4+3] = d[3];
1249 case DPSOFTRAST_BLENDMODE_ADDALPHA:
1250 for (x = startx;x < endx;x++)
1254 a = in4f[x*4+3] * 255.0f;
1255 d[0] = (int)(in4f[x*4+2]*a+pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1256 d[1] = (int)(in4f[x*4+1]*a+pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1257 d[2] = (int)(in4f[x*4+0]*a+pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1258 d[3] = (int)(in4f[x*4+3]*a+pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1259 pixel[x*4+0] = d[0];
1260 pixel[x*4+1] = d[1];
1261 pixel[x*4+2] = d[2];
1262 pixel[x*4+3] = d[3];
1265 case DPSOFTRAST_BLENDMODE_ADD:
1266 for (x = startx;x < endx;x++)
1270 d[0] = (int)(in4f[x*4+2]*255.0f+pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1271 d[1] = (int)(in4f[x*4+1]*255.0f+pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1272 d[2] = (int)(in4f[x*4+0]*255.0f+pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1273 d[3] = (int)(in4f[x*4+3]*255.0f+pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1274 pixel[x*4+0] = d[0];
1275 pixel[x*4+1] = d[1];
1276 pixel[x*4+2] = d[2];
1277 pixel[x*4+3] = d[3];
1280 case DPSOFTRAST_BLENDMODE_INVMOD:
1281 for (x = startx;x < endx;x++)
1285 d[0] = (int)((1.0f-in4f[x*4+2])*pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1286 d[1] = (int)((1.0f-in4f[x*4+1])*pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1287 d[2] = (int)((1.0f-in4f[x*4+0])*pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1288 d[3] = (int)((1.0f-in4f[x*4+3])*pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1289 pixel[x*4+0] = d[0];
1290 pixel[x*4+1] = d[1];
1291 pixel[x*4+2] = d[2];
1292 pixel[x*4+3] = d[3];
1295 case DPSOFTRAST_BLENDMODE_MUL:
1296 for (x = startx;x < endx;x++)
1300 d[0] = (int)(in4f[x*4+2]*pixel[x*4+0]);if (d[0] > 255) d[0] = 255;
1301 d[1] = (int)(in4f[x*4+1]*pixel[x*4+1]);if (d[1] > 255) d[1] = 255;
1302 d[2] = (int)(in4f[x*4+0]*pixel[x*4+2]);if (d[2] > 255) d[2] = 255;
1303 d[3] = (int)(in4f[x*4+3]*pixel[x*4+3]);if (d[3] > 255) d[3] = 255;
1304 pixel[x*4+0] = d[0];
1305 pixel[x*4+1] = d[1];
1306 pixel[x*4+2] = d[2];
1307 pixel[x*4+3] = d[3];
1310 case DPSOFTRAST_BLENDMODE_MUL2:
1311 for (x = startx;x < endx;x++)
1315 d[0] = (int)(in4f[x*4+2]*pixel[x*4+0]*2.0f);if (d[0] > 255) d[0] = 255;
1316 d[1] = (int)(in4f[x*4+1]*pixel[x*4+1]*2.0f);if (d[1] > 255) d[1] = 255;
1317 d[2] = (int)(in4f[x*4+0]*pixel[x*4+2]*2.0f);if (d[2] > 255) d[2] = 255;
1318 d[3] = (int)(in4f[x*4+3]*pixel[x*4+3]*2.0f);if (d[3] > 255) d[3] = 255;
1319 pixel[x*4+0] = d[0];
1320 pixel[x*4+1] = d[1];
1321 pixel[x*4+2] = d[2];
1322 pixel[x*4+3] = d[3];
1325 case DPSOFTRAST_BLENDMODE_SUBALPHA:
1326 for (x = startx;x < endx;x++)
1330 a = in4f[x*4+3] * -255.0f;
1331 d[0] = (int)(in4f[x*4+2]*a+pixel[x*4+0]);if (d[0] > 255) d[0] = 255;if (d[0] < 0) d[0] = 0;
1332 d[1] = (int)(in4f[x*4+1]*a+pixel[x*4+1]);if (d[1] > 255) d[1] = 255;if (d[1] < 0) d[1] = 0;
1333 d[2] = (int)(in4f[x*4+0]*a+pixel[x*4+2]);if (d[2] > 255) d[2] = 255;if (d[2] < 0) d[2] = 0;
1334 d[3] = (int)(in4f[x*4+3]*a+pixel[x*4+3]);if (d[3] > 255) d[3] = 255;if (d[3] < 0) d[3] = 0;
1335 pixel[x*4+0] = d[0];
1336 pixel[x*4+1] = d[1];
1337 pixel[x*4+2] = d[2];
1338 pixel[x*4+3] = d[3];
1341 case DPSOFTRAST_BLENDMODE_PSEUDOALPHA:
1342 for (x = startx;x < endx;x++)
1347 b = 1.0f - in4f[x*4+3];
1348 d[0] = (int)(in4f[x*4+2]*a+pixel[x*4+0]*b);if (d[0] > 255) d[0] = 255;
1349 d[1] = (int)(in4f[x*4+1]*a+pixel[x*4+1]*b);if (d[1] > 255) d[1] = 255;
1350 d[2] = (int)(in4f[x*4+0]*a+pixel[x*4+2]*b);if (d[2] > 255) d[2] = 255;
1351 d[3] = (int)(in4f[x*4+3]*a+pixel[x*4+3]*b);if (d[3] > 255) d[3] = 255;
1352 pixel[x*4+0] = d[0];
1353 pixel[x*4+1] = d[1];
1354 pixel[x*4+2] = d[2];
1355 pixel[x*4+3] = d[3];
1361 void DPSOFTRAST_Draw_Span_Texture2DVarying(const DPSOFTRAST_State_Draw_Span *span, float * RESTRICT out4f, int texunitindex, int arrayindex, const float * RESTRICT zf)
1364 int startx = span->startx;
1365 int endx = span->endx;
1372 unsigned int tci[2];
1373 unsigned int tci1[2];
1374 unsigned int tcimin[2];
1375 unsigned int tcimax[2];
1380 const unsigned char * RESTRICT pixelbase;
1381 const unsigned char * RESTRICT pixel[4];
1382 DPSOFTRAST_Texture *texture = dpsoftrast.texbound[texunitindex];
1383 // if no texture is bound, just fill it with white
1386 for (x = startx;x < endx;x++)
1388 out4f[x*4+0] = 1.0f;
1389 out4f[x*4+1] = 1.0f;
1390 out4f[x*4+2] = 1.0f;
1391 out4f[x*4+3] = 1.0f;
1395 mip = span->mip[texunitindex];
1396 // if this mipmap of the texture is 1 pixel, just fill it with that color
1397 if (texture->mipmap[mip][1] == 4)
1399 c[0] = texture->bytes[2] * (1.0f/255.0f);
1400 c[1] = texture->bytes[1] * (1.0f/255.0f);
1401 c[2] = texture->bytes[0] * (1.0f/255.0f);
1402 c[3] = texture->bytes[3] * (1.0f/255.0f);
1403 for (x = startx;x < endx;x++)
1405 out4f[x*4+0] = c[0];
1406 out4f[x*4+1] = c[1];
1407 out4f[x*4+2] = c[2];
1408 out4f[x*4+3] = c[3];
1412 filter = texture->filter & DPSOFTRAST_TEXTURE_FILTER_LINEAR;
1413 data[0] = span->data[0][arrayindex][0];
1414 data[1] = span->data[0][arrayindex][1];
1415 data[2] = span->data[0][arrayindex][2];
1416 data[3] = span->data[0][arrayindex][3];
1417 slope[0] = span->data[1][arrayindex][0];
1418 slope[1] = span->data[1][arrayindex][1];
1419 slope[2] = span->data[1][arrayindex][2];
1420 slope[3] = span->data[1][arrayindex][3];
1421 flags = texture->flags;
1422 pixelbase = (unsigned char *)texture->bytes + texture->mipmap[mip][0];
1423 tcscale[0] = texture->mipmap[mip][2];
1424 tcscale[1] = texture->mipmap[mip][3];
1425 tciwidth = texture->mipmap[mip][2];
1428 tcimax[0] = texture->mipmap[mip][2]-1;
1429 tcimax[1] = texture->mipmap[mip][3]-1;
1430 tciwrapmask[0] = texture->mipmap[mip][2]-1;
1431 tciwrapmask[1] = texture->mipmap[mip][3]-1;
1432 for (x = startx;x < endx;)
1435 unsigned int subtc[2];
1436 unsigned int substep[2];
1437 int endsub = x + DPSOFTRAST_MAXSUBSPAN-1;
1438 float subscale = 4096.0f/(DPSOFTRAST_MAXSUBSPAN-1);
1442 subscale = endsub > x ? 4096.0f / (endsub - x) : 1.0f;
1444 tc[0] = (data[0] + slope[0]*x) * zf[x] * tcscale[0] - 0.5f;
1445 tc[1] = (data[1] + slope[1]*x) * zf[x] * tcscale[1] - 0.5f;
1446 endtc[0] = (data[0] + slope[0]*endsub) * zf[endsub] * tcscale[0] - 0.5f;
1447 endtc[1] = (data[1] + slope[1]*endsub) * zf[endsub] * tcscale[1] - 0.5f;
1448 substep[0] = (endtc[0] - tc[0]) * subscale;
1449 substep[1] = (endtc[1] - tc[1]) * subscale;
1450 subtc[0] = tc[0] * (1<<12);
1451 subtc[1] = tc[1] * (1<<12);
1452 if (!(flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE))
1454 subtc[0] &= (tciwrapmask[0]<<12)|0xFFF;
1455 subtc[1] &= (tciwrapmask[1]<<12)|0xFFF;
1459 tci[0] = (subtc[0]>>12) - tcimin[0];
1460 tci[1] = (subtc[1]>>12) - tcimin[0];
1461 tci1[0] = ((subtc[0] + (endsub - x)*substep[0])>>12) + 1;
1462 tci1[1] = ((subtc[1] + (endsub - x)*substep[1])>>12) + 1;
1463 if (tci[0] <= tcimax[0] && tci[1] <= tcimax[1] && tci1[0] <= tcimax[0] && tci1[1] <= tcimax[1])
1465 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1467 unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1468 unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1469 unsigned int lerp[4] = { ifrac[0]*ifrac[1], frac[0]*ifrac[1], ifrac[0]*frac[1], frac[0]*frac[1] };
1470 tci[0] = subtc[0]>>12;
1471 tci[1] = subtc[1]>>12;
1472 pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1473 pixel[1] = pixel[0] + 4 * tciwidth;
1474 c[0] = (pixel[0][2]*lerp[0]+pixel[0][4+2]*lerp[1]+pixel[1][2]*lerp[2]+pixel[1][4+2]*lerp[3]) * (1.0f / 0xFF000000);
1475 c[1] = (pixel[0][1]*lerp[0]+pixel[0][4+1]*lerp[1]+pixel[1][1]*lerp[2]+pixel[1][4+1]*lerp[3]) * (1.0f / 0xFF000000);
1476 c[2] = (pixel[0][0]*lerp[0]+pixel[0][4+0]*lerp[1]+pixel[1][0]*lerp[2]+pixel[1][4+0]*lerp[3]) * (1.0f / 0xFF000000);
1477 c[3] = (pixel[0][3]*lerp[0]+pixel[0][4+3]*lerp[1]+pixel[1][3]*lerp[2]+pixel[1][4+3]*lerp[3]) * (1.0f / 0xFF000000);
1478 out4f[x*4+0] = c[0];
1479 out4f[x*4+1] = c[1];
1480 out4f[x*4+2] = c[2];
1481 out4f[x*4+3] = c[3];
1484 else if (flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE)
1486 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1488 unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1489 unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1490 unsigned int lerp[4] = { ifrac[0]*ifrac[1], frac[0]*ifrac[1], ifrac[0]*frac[1], frac[0]*frac[1] };
1491 tci[0] = subtc[0]>>12;
1492 tci[1] = subtc[1]>>12;
1493 tci1[0] = tci[0] + 1;
1494 tci1[1] = tci[1] + 1;
1495 tci[0] = tci[0] >= tcimin[0] ? (tci[0] <= tcimax[0] ? tci[0] : tcimax[0]) : tcimin[0];
1496 tci[1] = tci[1] >= tcimin[1] ? (tci[1] <= tcimax[1] ? tci[1] : tcimax[1]) : tcimin[1];
1497 tci1[0] = tci1[0] >= tcimin[0] ? (tci1[0] <= tcimax[0] ? tci1[0] : tcimax[0]) : tcimin[0];
1498 tci1[1] = tci1[1] >= tcimin[1] ? (tci1[1] <= tcimax[1] ? tci1[1] : tcimax[1]) : tcimin[1];
1499 pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1500 pixel[1] = pixelbase + 4 * (tci[1]*tciwidth+tci1[0]);
1501 pixel[2] = pixelbase + 4 * (tci1[1]*tciwidth+tci[0]);
1502 pixel[3] = pixelbase + 4 * (tci1[1]*tciwidth+tci1[0]);
1503 c[0] = (pixel[0][2]*lerp[0]+pixel[1][2]*lerp[1]+pixel[2][2]*lerp[2]+pixel[3][2]*lerp[3]) * (1.0f / 0xFF000000);
1504 c[1] = (pixel[0][1]*lerp[0]+pixel[1][1]*lerp[1]+pixel[2][1]*lerp[2]+pixel[3][1]*lerp[3]) * (1.0f / 0xFF000000);
1505 c[2] = (pixel[0][0]*lerp[0]+pixel[1][0]*lerp[1]+pixel[2][0]*lerp[2]+pixel[3][0]*lerp[3]) * (1.0f / 0xFF000000);
1506 c[3] = (pixel[0][3]*lerp[0]+pixel[1][3]*lerp[1]+pixel[2][3]*lerp[2]+pixel[3][3]*lerp[3]) * (1.0f / 0xFF000000);
1507 out4f[x*4+0] = c[0];
1508 out4f[x*4+1] = c[1];
1509 out4f[x*4+2] = c[2];
1510 out4f[x*4+3] = c[3];
1515 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1517 unsigned int frac[2] = { subtc[0]&0xFFF, subtc[1]&0xFFF };
1518 unsigned int ifrac[2] = { 0x1000 - frac[0], 0x1000 - frac[1] };
1519 unsigned int lerp[4] = { ifrac[0]*ifrac[1], frac[0]*ifrac[1], ifrac[0]*frac[1], frac[0]*frac[1] };
1520 tci[0] = subtc[0]>>12;
1521 tci[1] = subtc[1]>>12;
1522 tci1[0] = tci[0] + 1;
1523 tci1[1] = tci[1] + 1;
1524 tci[0] &= tciwrapmask[0];
1525 tci[1] &= tciwrapmask[1];
1526 tci1[0] &= tciwrapmask[0];
1527 tci1[1] &= tciwrapmask[1];
1528 pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1529 pixel[1] = pixelbase + 4 * (tci[1]*tciwidth+tci1[0]);
1530 pixel[2] = pixelbase + 4 * (tci1[1]*tciwidth+tci[0]);
1531 pixel[3] = pixelbase + 4 * (tci1[1]*tciwidth+tci1[0]);
1532 c[0] = (pixel[0][2]*lerp[0]+pixel[1][2]*lerp[1]+pixel[2][2]*lerp[2]+pixel[3][2]*lerp[3]) * (1.0f / 0xFF000000);
1533 c[1] = (pixel[0][1]*lerp[0]+pixel[1][1]*lerp[1]+pixel[2][1]*lerp[2]+pixel[3][1]*lerp[3]) * (1.0f / 0xFF000000);
1534 c[2] = (pixel[0][0]*lerp[0]+pixel[1][0]*lerp[1]+pixel[2][0]*lerp[2]+pixel[3][0]*lerp[3]) * (1.0f / 0xFF000000);
1535 c[3] = (pixel[0][3]*lerp[0]+pixel[1][3]*lerp[1]+pixel[2][3]*lerp[2]+pixel[3][3]*lerp[3]) * (1.0f / 0xFF000000);
1536 out4f[x*4+0] = c[0];
1537 out4f[x*4+1] = c[1];
1538 out4f[x*4+2] = c[2];
1539 out4f[x*4+3] = c[3];
1543 else if (flags & DPSOFTRAST_TEXTURE_FLAG_CLAMPTOEDGE)
1545 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1547 tci[0] = subtc[0]>>12;
1548 tci[1] = subtc[1]>>12;
1549 tci[0] = tci[0] >= tcimin[0] ? (tci[0] <= tcimax[0] ? tci[0] : tcimax[0]) : tcimin[0];
1550 tci[1] = tci[1] >= tcimin[1] ? (tci[1] <= tcimax[1] ? tci[1] : tcimax[1]) : tcimin[1];
1551 pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1552 c[0] = pixel[0][2] * (1.0f / 255.0f);
1553 c[1] = pixel[0][1] * (1.0f / 255.0f);
1554 c[2] = pixel[0][0] * (1.0f / 255.0f);
1555 c[3] = pixel[0][3] * (1.0f / 255.0f);
1556 out4f[x*4+0] = c[0];
1557 out4f[x*4+1] = c[1];
1558 out4f[x*4+2] = c[2];
1559 out4f[x*4+3] = c[3];
1564 for (; x <= endsub; x++, subtc[0] += substep[0], subtc[1] += substep[1])
1566 tci[0] = subtc[0]>>12;
1567 tci[1] = subtc[1]>>12;
1568 tci[0] &= tciwrapmask[0];
1569 tci[1] &= tciwrapmask[1];
1570 pixel[0] = pixelbase + 4 * (tci[1]*tciwidth+tci[0]);
1571 c[0] = pixel[0][2] * (1.0f / 255.0f);
1572 c[1] = pixel[0][1] * (1.0f / 255.0f);
1573 c[2] = pixel[0][0] * (1.0f / 255.0f);
1574 c[3] = pixel[0][3] * (1.0f / 255.0f);
1575 out4f[x*4+0] = c[0];
1576 out4f[x*4+1] = c[1];
1577 out4f[x*4+2] = c[2];
1578 out4f[x*4+3] = c[3];
1584 void DPSOFTRAST_Draw_Span_MultiplyVarying(const DPSOFTRAST_State_Draw_Span *span, float *out4f, const float *in4f, int arrayindex, const float *zf)
1587 int startx = span->startx;
1588 int endx = span->endx;
1593 data[0] = span->data[0][arrayindex][0];
1594 data[1] = span->data[0][arrayindex][1];
1595 data[2] = span->data[0][arrayindex][2];
1596 data[3] = span->data[0][arrayindex][3];
1597 slope[0] = span->data[1][arrayindex][0];
1598 slope[1] = span->data[1][arrayindex][1];
1599 slope[2] = span->data[1][arrayindex][2];
1600 slope[3] = span->data[1][arrayindex][3];
1601 for (x = startx;x < endx;x++)
1604 c[0] = (data[0] + slope[0]*x) * z;
1605 c[1] = (data[1] + slope[1]*x) * z;
1606 c[2] = (data[2] + slope[2]*x) * z;
1607 c[3] = (data[3] + slope[3]*x) * z;
1608 out4f[x*4+0] = in4f[x*4+0] * c[0];
1609 out4f[x*4+1] = in4f[x*4+1] * c[1];
1610 out4f[x*4+2] = in4f[x*4+2] * c[2];
1611 out4f[x*4+3] = in4f[x*4+3] * c[3];
1615 void DPSOFTRAST_Draw_Span_AddBloom(const DPSOFTRAST_State_Draw_Span *span, float *out4f, const float *ina4f, const float *inb4f, const float *subcolor)
1617 int x, startx = span->startx, endx = span->endx;
1618 float c[4], localcolor[4];
1619 localcolor[0] = subcolor[0];
1620 localcolor[1] = subcolor[1];
1621 localcolor[2] = subcolor[2];
1622 localcolor[3] = subcolor[3];
1623 for (x = startx;x < endx;x++)
1625 c[0] = inb4f[x*4+0] - localcolor[0];if (c[0] < 0.0f) c[0] = 0.0f;
1626 c[1] = inb4f[x*4+1] - localcolor[1];if (c[1] < 0.0f) c[1] = 0.0f;
1627 c[2] = inb4f[x*4+2] - localcolor[2];if (c[2] < 0.0f) c[2] = 0.0f;
1628 c[3] = inb4f[x*4+3] - localcolor[3];if (c[3] < 0.0f) c[3] = 0.0f;
1629 out4f[x*4+0] = ina4f[x*4+0] + c[0];
1630 out4f[x*4+1] = ina4f[x*4+1] + c[1];
1631 out4f[x*4+2] = ina4f[x*4+2] + c[2];
1632 out4f[x*4+3] = ina4f[x*4+3] + c[3];
1636 void DPSOFTRAST_Draw_Span_MixUniformColor(const DPSOFTRAST_State_Draw_Span *span, float *out4f, const float *in4f, const float *color)
1638 int x, startx = span->startx, endx = span->endx;
1639 float localcolor[4], ilerp, lerp;
1640 localcolor[0] = color[0];
1641 localcolor[1] = color[1];
1642 localcolor[2] = color[2];
1643 localcolor[3] = color[3];
1644 ilerp = 1.0f - localcolor[3];
1645 lerp = localcolor[3];
1646 for (x = startx;x < endx;x++)
1648 out4f[x*4+0] = in4f[x*4+0] * ilerp + localcolor[0] * lerp;
1649 out4f[x*4+1] = in4f[x*4+1] * ilerp + localcolor[1] * lerp;
1650 out4f[x*4+2] = in4f[x*4+2] * ilerp + localcolor[2] * lerp;
1651 out4f[x*4+3] = in4f[x*4+3] * ilerp + localcolor[3] * lerp;
1655 void DPSOFTRAST_Draw_Span_Lightmap(const DPSOFTRAST_State_Draw_Span *span, float * RESTRICT out4f, const float * RESTRICT diffuse, const float * RESTRICT lightmap)
1657 int x, startx = span->startx, endx = span->endx;
1658 float Color_Ambient[4], Color_Diffuse[4];
1659 Color_Ambient[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+0];
1660 Color_Ambient[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+1];
1661 Color_Ambient[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+2];
1662 Color_Ambient[3] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Alpha*4+0];
1663 Color_Diffuse[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+0];
1664 Color_Diffuse[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+1];
1665 Color_Diffuse[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+2];
1666 Color_Diffuse[3] = 0.0f;
1667 for (x = startx;x < endx;x++)
1669 out4f[x*4+0] = diffuse[x*4+0] * (Color_Ambient[0] + lightmap[x*4+0] * Color_Diffuse[0]);
1670 out4f[x*4+1] = diffuse[x*4+1] * (Color_Ambient[1] + lightmap[x*4+1] * Color_Diffuse[1]);
1671 out4f[x*4+2] = diffuse[x*4+2] * (Color_Ambient[2] + lightmap[x*4+2] * Color_Diffuse[2]);
1672 out4f[x*4+3] = diffuse[x*4+3] * (Color_Ambient[3] + lightmap[x*4+3] * Color_Diffuse[3]);
1676 void DPSOFTRAST_Draw_Span_Lightmap_Finish(const DPSOFTRAST_State_Draw_Span *span, const float * RESTRICT diffuse, const float * RESTRICT lightmap)
1678 int x, startx = span->startx, endx = span->endx;
1680 float Color_Ambient[4], Color_Diffuse[4];
1681 unsigned char * RESTRICT pixelmask = span->pixelmask;
1682 unsigned char * RESTRICT pixel = (unsigned char *)dpsoftrast.fb_colorpixels[0];
1685 pixel += span->start * 4;
1686 Color_Ambient[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+0]*255.0f;
1687 Color_Ambient[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+1]*255.0f;
1688 Color_Ambient[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+2]*255.0f;
1689 Color_Ambient[3] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Alpha*4+0]*255.0f;
1690 Color_Diffuse[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+0]*255.0f;
1691 Color_Diffuse[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+1]*255.0f;
1692 Color_Diffuse[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+2]*255.0f;
1693 Color_Diffuse[3] = 0.0f;
1694 for (x = startx;x < endx;x++)
1698 d[0] = diffuse[x*4+0] * (Color_Ambient[0] + lightmap[x*4+0] * Color_Diffuse[0]);if (d[0] > 255) d[0] = 255;
1699 d[1] = diffuse[x*4+1] * (Color_Ambient[1] + lightmap[x*4+1] * Color_Diffuse[1]);if (d[1] > 255) d[1] = 255;
1700 d[2] = diffuse[x*4+2] * (Color_Ambient[2] + lightmap[x*4+2] * Color_Diffuse[2]);if (d[2] > 255) d[2] = 255;
1701 d[3] = diffuse[x*4+3] * (Color_Ambient[3] + lightmap[x*4+3] * Color_Diffuse[3]);if (d[3] > 255) d[3] = 255;
1702 pixel[x*4+0] = d[2];
1703 pixel[x*4+1] = d[1];
1704 pixel[x*4+2] = d[0];
1705 pixel[x*4+3] = d[3];
1709 void DPSOFTRAST_Draw_Span_VertexColor(const DPSOFTRAST_State_Draw_Span *span, float *out4f, const float *diffuse, const float *zf)
1711 int x, startx = span->startx, endx = span->endx;
1712 float Color_Ambient[4], Color_Diffuse[4];
1717 int arrayindex = DPSOFTRAST_ARRAY_COLOR;
1718 data[0] = span->data[0][arrayindex][0];
1719 data[1] = span->data[0][arrayindex][1];
1720 data[2] = span->data[0][arrayindex][2];
1721 data[3] = span->data[0][arrayindex][3];
1722 slope[0] = span->data[1][arrayindex][0];
1723 slope[1] = span->data[1][arrayindex][1];
1724 slope[2] = span->data[1][arrayindex][2];
1725 slope[3] = span->data[1][arrayindex][3];
1726 Color_Ambient[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+0];
1727 Color_Ambient[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+1];
1728 Color_Ambient[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+2];
1729 Color_Ambient[3] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Alpha*4+0];
1730 Color_Diffuse[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+0];
1731 Color_Diffuse[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+1];
1732 Color_Diffuse[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Diffuse*4+2];
1733 Color_Diffuse[3] = 0.0f;
1734 for (x = startx;x < endx;x++)
1737 c[0] = (data[0] + slope[0]*x) * z;
1738 c[1] = (data[1] + slope[1]*x) * z;
1739 c[2] = (data[2] + slope[2]*x) * z;
1740 c[3] = (data[3] + slope[3]*x) * z;
1741 out4f[x*4+0] = diffuse[x*4+0] * (Color_Ambient[0] + c[0] * Color_Diffuse[0]);
1742 out4f[x*4+1] = diffuse[x*4+1] * (Color_Ambient[1] + c[1] * Color_Diffuse[1]);
1743 out4f[x*4+2] = diffuse[x*4+2] * (Color_Ambient[2] + c[2] * Color_Diffuse[2]);
1744 out4f[x*4+3] = diffuse[x*4+3] * (Color_Ambient[3] + c[3] * Color_Diffuse[3]);
1748 void DPSOFTRAST_Draw_Span_FlatColor(const DPSOFTRAST_State_Draw_Span *span, float *out4f, const float *diffuse)
1750 int x, startx = span->startx, endx = span->endx;
1751 float Color_Ambient[4];
1752 Color_Ambient[0] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+0];
1753 Color_Ambient[1] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+1];
1754 Color_Ambient[2] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Color_Ambient*4+2];
1755 Color_Ambient[3] = dpsoftrast.uniform4f[DPSOFTRAST_UNIFORM_Alpha*4+0];
1756 for (x = startx;x < endx;x++)
1758 out4f[x*4+0] = diffuse[x*4+0] * Color_Ambient[0];
1759 out4f[x*4+1] = diffuse[x*4+1] * Color_Ambient[1];
1760 out4f[x*4+2] = diffuse[x*4+2] * Color_Ambient[2];
1761 out4f[x*4+3] = diffuse[x*4+3] * Color_Ambient[3];
1765 void DPSOFTRAST_Draw_VertexShader(void)
1767 DPSOFTRAST_Array_Transform(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_POSITION], dpsoftrast.draw.numvertices, dpsoftrast.uniform4f + 4*DPSOFTRAST_UNIFORM_ModelViewProjectionMatrixM1);
1768 switch(dpsoftrast.shader_mode)
1770 case SHADERMODE_GENERIC: ///< (particles/HUD/etc) vertex color: optionally multiplied by one texture
1771 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_COLOR], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_COLOR], dpsoftrast.draw.numvertices);
1772 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices);
1774 case SHADERMODE_POSTPROCESS: ///< postprocessing shader (r_glsl_postprocess)
1775 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices);
1776 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD1], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD1], dpsoftrast.draw.numvertices);
1778 case SHADERMODE_DEPTH_OR_SHADOW: ///< (depthfirst/shadows) vertex shader only
1780 case SHADERMODE_FLATCOLOR: ///< (lightmap) modulate texture by uniform color (q1bsp: q3bsp)
1781 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices);
1783 case SHADERMODE_VERTEXCOLOR: ///< (lightmap) modulate texture by vertex colors (q3bsp)
1784 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_COLOR], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_COLOR], dpsoftrast.draw.numvertices);
1785 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices);
1787 case SHADERMODE_LIGHTMAP: ///< (lightmap) modulate texture by lightmap texture (q1bsp: q3bsp)
1788 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices);
1789 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD4], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD4], dpsoftrast.draw.numvertices);
1791 case SHADERMODE_FAKELIGHT: ///< (fakelight) modulate texture by "fake" lighting (no lightmaps: no nothing)
1793 case SHADERMODE_LIGHTDIRECTIONMAP_MODELSPACE: ///< (lightmap) use directional pixel shading from texture containing modelspace light directions (q3bsp deluxemap)
1795 case SHADERMODE_LIGHTDIRECTIONMAP_TANGENTSPACE: ///< (lightmap) use directional pixel shading from texture containing tangentspace light directions (q1bsp deluxemap)
1797 case SHADERMODE_LIGHTDIRECTION: ///< (lightmap) use directional pixel shading from fixed light direction (q3bsp)
1798 DPSOFTRAST_Array_Copy(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.in_array4f[DPSOFTRAST_ARRAY_TEXCOORD0], dpsoftrast.draw.numvertices);
1799 DPSOFTRAST_Draw_VertexShaderLightDirection();
1801 case SHADERMODE_LIGHTSOURCE: ///< (lightsource) use directional pixel shading from light source (rtlight)
1803 case SHADERMODE_REFRACTION: ///< refract background (the material is rendered normally after this pass)
1805 case SHADERMODE_WATER: ///< refract background and reflection (the material is rendered normally after this pass)
1807 case SHADERMODE_SHOWDEPTH: ///< (debugging) renders depth as color
1809 case SHADERMODE_DEFERREDGEOMETRY: ///< (deferred) render material properties to screenspace geometry buffers
1811 case SHADERMODE_DEFERREDLIGHTSOURCE: ///< (deferred) use directional pixel shading from light source (rtlight) on screenspace geometry buffers
1813 case SHADERMODE_COUNT:
1818 void DPSOFTRAST_Draw_PixelShaderSpan(const DPSOFTRAST_State_Draw_Span *span)
1820 float buffer_z[DPSOFTRAST_DRAW_MAXSPANLENGTH];
1821 float buffer_texture_color[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
1822 float buffer_texture_lightmap[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
1823 float buffer_FragColor[DPSOFTRAST_DRAW_MAXSPANLENGTH*4];
1824 switch(dpsoftrast.shader_mode)
1826 case SHADERMODE_GENERIC: ///< (particles/HUD/etc) vertex color: optionally multiplied by one texture
1827 DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
1828 DPSOFTRAST_Draw_Span_Texture2DVarying(span, buffer_texture_color, GL20TU_FIRST, 2, buffer_z);
1829 DPSOFTRAST_Draw_Span_MultiplyVarying(span, buffer_FragColor, buffer_texture_color, 1, buffer_z);
1830 DPSOFTRAST_Draw_Span_Finish(span, buffer_FragColor);
1832 case SHADERMODE_POSTPROCESS: ///< postprocessing shader (r_glsl_postprocess)
1833 // TODO: optimize!! at the very least there is no reason to use texture sampling on the frame texture
1834 DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
1835 DPSOFTRAST_Draw_Span_Texture2DVarying(span, buffer_FragColor, GL20TU_FIRST, 2, buffer_z);
1836 if (dpsoftrast.shader_permutation & SHADERPERMUTATION_BLOOM)
1838 DPSOFTRAST_Draw_Span_Texture2DVarying(span, buffer_texture_color, GL20TU_SECOND, 3, buffer_z);
1839 DPSOFTRAST_Draw_Span_AddBloom(span, buffer_FragColor, buffer_FragColor, buffer_texture_color, dpsoftrast.uniform4f + DPSOFTRAST_UNIFORM_BloomColorSubtract * 4);
1841 DPSOFTRAST_Draw_Span_MixUniformColor(span, buffer_FragColor, buffer_FragColor, dpsoftrast.uniform4f + DPSOFTRAST_UNIFORM_ViewTintColor * 4);
1842 if (dpsoftrast.shader_permutation & SHADERPERMUTATION_SATURATION)
1844 // TODO: implement saturation
1846 if (dpsoftrast.shader_permutation & SHADERPERMUTATION_GAMMARAMPS)
1848 // TODO: implement gammaramps
1850 DPSOFTRAST_Draw_Span_Finish(span, buffer_FragColor);
1852 case SHADERMODE_DEPTH_OR_SHADOW: ///< (depthfirst/shadows) vertex shader only
1854 case SHADERMODE_FLATCOLOR: ///< (lightmap) modulate texture by uniform color (q1bsp: q3bsp)
1855 DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
1856 DPSOFTRAST_Draw_Span_Texture2DVarying(span, buffer_texture_color, GL20TU_COLOR, 2, buffer_z);
1857 DPSOFTRAST_Draw_Span_FlatColor(span, buffer_FragColor, buffer_texture_color);
1858 DPSOFTRAST_Draw_Span_Finish(span, buffer_FragColor);
1860 case SHADERMODE_VERTEXCOLOR: ///< (lightmap) modulate texture by vertex colors (q3bsp)
1861 DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
1862 DPSOFTRAST_Draw_Span_Texture2DVarying(span, buffer_texture_color, GL20TU_COLOR, 2, buffer_z);
1863 DPSOFTRAST_Draw_Span_VertexColor(span, buffer_FragColor, buffer_texture_color, buffer_z);
1864 DPSOFTRAST_Draw_Span_Finish(span, buffer_FragColor);
1866 case SHADERMODE_LIGHTMAP: ///< (lightmap) modulate texture by lightmap texture (q1bsp: q3bsp)
1867 DPSOFTRAST_Draw_Span_Begin(span, buffer_z);
1868 DPSOFTRAST_Draw_Span_Texture2DVarying(span, buffer_texture_color, GL20TU_COLOR, 2, buffer_z);
1869 DPSOFTRAST_Draw_Span_Texture2DVarying(span, buffer_texture_lightmap, GL20TU_LIGHTMAP, 6, buffer_z);
1870 if(!dpsoftrast.user.alphatest && dpsoftrast.fb_blendmode == DPSOFTRAST_BLENDMODE_OPAQUE)
1872 DPSOFTRAST_Draw_Span_Lightmap_Finish(span, buffer_texture_color, buffer_texture_lightmap);
1876 DPSOFTRAST_Draw_Span_Lightmap(span, buffer_FragColor, buffer_texture_color, buffer_texture_lightmap);
1877 DPSOFTRAST_Draw_Span_Finish(span, buffer_FragColor);
1880 case SHADERMODE_FAKELIGHT: ///< (fakelight) modulate texture by "fake" lighting (no lightmaps: no nothing)
1882 case SHADERMODE_LIGHTDIRECTIONMAP_MODELSPACE: ///< (lightmap) use directional pixel shading from texture containing modelspace light directions (q3bsp deluxemap)
1884 case SHADERMODE_LIGHTDIRECTIONMAP_TANGENTSPACE: ///< (lightmap) use directional pixel shading from texture containing tangentspace light directions (q1bsp deluxemap)
1886 case SHADERMODE_LIGHTDIRECTION: ///< (lightmap) use directional pixel shading from fixed light direction (q3bsp)
1888 case SHADERMODE_LIGHTSOURCE: ///< (lightsource) use directional pixel shading from light source (rtlight)
1890 case SHADERMODE_REFRACTION: ///< refract background (the material is rendered normally after this pass)
1892 case SHADERMODE_WATER: ///< refract background and reflection (the material is rendered normally after this pass)
1894 case SHADERMODE_SHOWDEPTH: ///< (debugging) renders depth as color
1896 case SHADERMODE_DEFERREDGEOMETRY: ///< (deferred) render material properties to screenspace geometry buffers
1898 case SHADERMODE_DEFERREDLIGHTSOURCE: ///< (deferred) use directional pixel shading from light source (rtlight) on screenspace geometry buffers
1900 case SHADERMODE_COUNT:
1905 void DPSOFTRAST_Draw_ProcessSpans(void)
1911 int numspans = dpsoftrast.draw.numspans;
1913 // unsigned int *colorpixel;
1914 unsigned int *depthpixel;
1920 DPSOFTRAST_State_Draw_Span *span = dpsoftrast.draw.spanqueue;
1921 unsigned char pixelmask[DPSOFTRAST_DRAW_MAXSPANLENGTH];
1922 for (i = 0;i < numspans;i++, span++)
1924 w = span->data[0][DPSOFTRAST_ARRAY_TOTAL][3];
1925 wslope = span->data[1][DPSOFTRAST_ARRAY_TOTAL][3];
1926 if (dpsoftrast.user.depthtest && dpsoftrast.fb_depthpixels)
1928 depth = (int)(w*DPSOFTRAST_DEPTHSCALE);
1929 depthslope = (int)(wslope*DPSOFTRAST_DEPTHSCALE);
1930 depthpixel = dpsoftrast.fb_depthpixels + span->start;
1931 switch(dpsoftrast.fb_depthfunc)
1934 case GL_ALWAYS: for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = true; break;
1935 case GL_LESS: for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] < d; break;
1936 case GL_LEQUAL: for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] <= d; break;
1937 case GL_EQUAL: for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] == d; break;
1938 case GL_GEQUAL: for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] >= d; break;
1939 case GL_GREATER: for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = depthpixel[x] > d; break;
1940 case GL_NEVER: for (x = 0, d = depth;x < span->length;x++, d += depthslope) pixelmask[x] = false; break;
1942 //colorpixel = dpsoftrast.fb_colorpixels[0] + span->start;
1943 //for (x = 0;x < span->length;x++)
1944 // colorpixel[x] = (depthpixel[x] & 0xFF000000) ? (0x00FF0000) : (depthpixel[x] & 0x00FF0000);
1945 // if there is no color buffer, skip pixel shader
1947 endx = span->length;
1948 while (startx < endx && !pixelmask[startx])
1950 while (endx > startx && !pixelmask[endx-1])
1953 continue; // no pixels to fill
1954 span->pixelmask = pixelmask;
1955 span->startx = startx;
1957 // run pixel shader if appropriate
1958 // do this before running depthmask code, to allow the pixelshader
1959 // to clear pixelmask values for alpha testing
1960 if (dpsoftrast.fb_colorpixels[0] && dpsoftrast.fb_colormask)
1961 DPSOFTRAST_Draw_PixelShaderSpan(span);
1962 if (dpsoftrast.user.depthmask)
1963 for (x = 0, d = depth;x < span->length;x++, d += depthslope)
1969 // no depth testing means we're just dealing with color...
1970 // if there is no color buffer, skip pixel shader
1971 if (dpsoftrast.fb_colorpixels[0] && dpsoftrast.fb_colormask)
1973 memset(pixelmask, 1, span->length);
1974 span->pixelmask = pixelmask;
1976 span->endx = span->length;
1977 DPSOFTRAST_Draw_PixelShaderSpan(span);
1983 void DPSOFTRAST_Draw_ProcessTriangles(int firstvertex, int numvertices, int numtriangles, const int *element3i, const unsigned short *element3s, unsigned char *arraymask)
1985 int cullface = dpsoftrast.user.cullface;
1986 int width = dpsoftrast.fb_width;
1987 int height = dpsoftrast.fb_height;
2005 float mip_edge0tc[2];
2006 float mip_edge1tc[2];
2007 float mip_edge0xy[2];
2008 float mip_edge1xy[2];
2009 float mip_edge0xymul;
2010 float mip_edge1xymul;
2014 unsigned char mip[DPSOFTRAST_MAXTEXTUREUNITS];
2029 float trianglearea2;
2030 float triangleedge[2][4];
2031 float trianglenormal[4];
2033 float clipped[DPSOFTRAST_ARRAY_TOTAL][4][4];
2035 float proj[DPSOFTRAST_ARRAY_TOTAL][4][4];
2036 DPSOFTRAST_Texture *texture;
2037 DPSOFTRAST_State_Draw_Span *span;
2038 DPSOFTRAST_State_Draw_Span *oldspan;
2039 for (i = 0;i < numtriangles;i++)
2041 // generate the 3 edges of this triangle
2042 // generate spans for the triangle - switch based on left split or right split classification of triangle
2045 e[0] = element3i[i*3+0] - firstvertex;
2046 e[1] = element3i[i*3+1] - firstvertex;
2047 e[2] = element3i[i*3+2] - firstvertex;
2051 e[0] = element3s[i*3+0] - firstvertex;
2052 e[1] = element3s[i*3+1] - firstvertex;
2053 e[2] = element3s[i*3+2] - firstvertex;
2061 triangleedge[0][0] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[0]*4+0] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+0];
2062 triangleedge[0][1] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[0]*4+1] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+1];
2063 triangleedge[0][2] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[0]*4+2] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+2];
2064 triangleedge[1][0] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[2]*4+0] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+0];
2065 triangleedge[1][1] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[2]*4+1] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+1];
2066 triangleedge[1][2] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[2]*4+2] - dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+2];
2067 trianglenormal[0] = triangleedge[0][1] * triangleedge[1][2] - triangleedge[0][2] * triangleedge[1][1];
2068 trianglenormal[1] = triangleedge[0][2] * triangleedge[1][0] - triangleedge[0][0] * triangleedge[1][2];
2069 trianglenormal[2] = triangleedge[0][0] * triangleedge[1][1] - triangleedge[0][1] * triangleedge[1][0];
2070 trianglearea2 = trianglenormal[0] * trianglenormal[0] + trianglenormal[1] * trianglenormal[1] + trianglenormal[2] * trianglenormal[2];
2071 // skip degenerate triangles, nothing good can come from them...
2072 if (trianglearea2 == 0.0f)
2074 // apply current cullface mode (this culls many triangles)
2078 if (trianglenormal[2] < 0)
2082 if (trianglenormal[2] > 0)
2086 // calculate distance from nearplane
2087 clipdist[0] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[0]*4+2] + 1.0f;
2088 clipdist[1] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[1]*4+2] + 1.0f;
2089 clipdist[2] = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][e[2]*4+2] + 1.0f;
2091 if (clipdist[0] < 0.0f)
2093 if (clipdist[1] < 0.0f)
2095 if (clipdist[2] < 0.0f)
2097 // clip triangle if necessary
2101 // triangle is entirely in front of nearplane
2103 // macros for clipping vertices
2104 #define CLIPPEDVERTEXLERP(k,p1,p2) \
2105 frac = clipdist[p1] / (clipdist[p1] - clipdist[p2]);\
2106 ifrac = 1.0f - frac;\
2107 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)\
2111 clipped[j][k][0] = dpsoftrast.draw.post_array4f[j][e[p1]*4+0]*ifrac+dpsoftrast.draw.post_array4f[j][e[p2]*4+0]*frac;\
2112 clipped[j][k][1] = dpsoftrast.draw.post_array4f[j][e[p1]*4+1]*ifrac+dpsoftrast.draw.post_array4f[j][e[p2]*4+1]*frac;\
2113 clipped[j][k][2] = dpsoftrast.draw.post_array4f[j][e[p1]*4+2]*ifrac+dpsoftrast.draw.post_array4f[j][e[p2]*4+2]*frac;\
2114 clipped[j][k][3] = dpsoftrast.draw.post_array4f[j][e[p1]*4+3]*ifrac+dpsoftrast.draw.post_array4f[j][e[p2]*4+3]*frac;\
2117 DPSOFTRAST_Draw_ProjectVertices(screen[k], clipped[DPSOFTRAST_ARRAY_POSITION][k], 1)
2118 #define CLIPPEDVERTEXCOPY(k,p1) \
2119 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)\
2123 clipped[j][k][0] = dpsoftrast.draw.post_array4f[j][e[p1]*4+0];\
2124 clipped[j][k][1] = dpsoftrast.draw.post_array4f[j][e[p1]*4+1];\
2125 clipped[j][k][2] = dpsoftrast.draw.post_array4f[j][e[p1]*4+2];\
2126 clipped[j][k][3] = dpsoftrast.draw.post_array4f[j][e[p1]*4+3];\
2129 screen[k][0] = dpsoftrast.draw.screencoord4f[e[p1]*4+0];\
2130 screen[k][1] = dpsoftrast.draw.screencoord4f[e[p1]*4+1];\
2131 screen[k][2] = dpsoftrast.draw.screencoord4f[e[p1]*4+2];\
2132 screen[k][3] = dpsoftrast.draw.screencoord4f[e[p1]*4+3];
2134 CLIPPEDVERTEXCOPY(0,0);
2135 CLIPPEDVERTEXCOPY(1,1);
2136 CLIPPEDVERTEXCOPY(2,2);
2140 CLIPPEDVERTEXLERP(0,0,1);
2141 CLIPPEDVERTEXCOPY(1,1);
2142 CLIPPEDVERTEXCOPY(2,2);
2143 CLIPPEDVERTEXLERP(3,2,0);
2147 CLIPPEDVERTEXCOPY(0,0);
2148 CLIPPEDVERTEXLERP(1,0,1);
2149 CLIPPEDVERTEXLERP(2,1,2);
2150 CLIPPEDVERTEXCOPY(3,2);
2154 CLIPPEDVERTEXLERP(0,1,2);
2155 CLIPPEDVERTEXCOPY(1,2);
2156 CLIPPEDVERTEXLERP(2,2,0);
2160 CLIPPEDVERTEXCOPY(0,0);
2161 CLIPPEDVERTEXCOPY(1,1);
2162 CLIPPEDVERTEXLERP(2,1,2);
2163 CLIPPEDVERTEXLERP(3,2,0);
2167 CLIPPEDVERTEXLERP(0,0,1);
2168 CLIPPEDVERTEXCOPY(1,1);
2169 CLIPPEDVERTEXLERP(2,1,2);
2173 CLIPPEDVERTEXCOPY(0,0);
2174 CLIPPEDVERTEXLERP(1,0,1);
2175 CLIPPEDVERTEXLERP(2,2,0);
2179 // triangle is entirely behind nearplane
2182 // calculate integer y coords for triangle points
2183 screenx[0] = (int)(screen[0][0]);
2184 screeny[0] = (int)(screen[0][1]);
2185 screenx[1] = (int)(screen[1][0]);
2186 screeny[1] = (int)(screen[1][1]);
2187 screenx[2] = (int)(screen[2][0]);
2188 screeny[2] = (int)(screen[2][1]);
2189 screenx[3] = (int)(screen[3][0]);
2190 screeny[3] = (int)(screen[3][1]);
2191 // figure out the extents (bounding box) of the triangle
2192 extent[0] = screenx[0];
2193 extent[1] = screeny[0];
2194 extent[2] = screenx[0];
2195 extent[3] = screeny[0];
2196 for (j = 1;j < numpoints;j++)
2198 if (extent[0] > screenx[j]) extent[0] = screenx[j];
2199 if (extent[1] > screeny[j]) extent[1] = screeny[j];
2200 if (extent[2] < screenx[j]) extent[2] = screenx[j];
2201 if (extent[3] < screeny[j]) extent[3] = screeny[j];
2211 if (extent[2] > width)
2213 if (extent[3] > height)
2215 // skip offscreen triangles
2216 if (extent[2] <= extent[0] || extent[3] <= extent[1])
2218 // okay, this triangle is going to produce spans, we'd better project
2219 // the interpolants now (this is what gives perspective texturing),
2220 // this consists of simply multiplying all arrays by the W coord
2221 // (which is basically 1/Z), which will be undone per-pixel
2222 // (multiplying by Z again) to get the perspective-correct array
2224 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
2228 for (k = 0;k < numpoints;k++)
2231 proj[j][k][0] = clipped[j][k][0] * w;
2232 proj[j][k][1] = clipped[j][k][1] * w;
2233 proj[j][k][2] = clipped[j][k][2] * w;
2234 proj[j][k][3] = clipped[j][k][3] * w;
2238 // adjust texture LOD by texture density, in the simplest way possible...
2239 mip_edge0xy[0] = screen[0][0] - screen[1][0];
2240 mip_edge0xy[1] = screen[0][1] - screen[1][1];
2241 mip_edge1xy[0] = screen[2][0] - screen[1][0];
2242 mip_edge1xy[1] = screen[2][1] - screen[1][1];
2243 mip_edge0xymul = 1.0f / (mip_edge0xy[0]*mip_edge0xy[0]+mip_edge0xy[1]*mip_edge0xy[1]);
2244 mip_edge1xymul = 1.0f / (mip_edge1xy[0]*mip_edge1xy[0]+mip_edge1xy[1]*mip_edge1xy[1]);
2245 for (j = 0;j < DPSOFTRAST_MAXTEXTUREUNITS;j++)
2247 texture = dpsoftrast.texbound[j];
2250 if (texture->filter <= DPSOFTRAST_TEXTURE_FILTER_LINEAR)
2255 // FIXME: use appropriate array for this texture!
2256 mip_edge0tc[0] = (clipped[DPSOFTRAST_ARRAY_TEXCOORD0][0][0] - clipped[DPSOFTRAST_ARRAY_TEXCOORD0][1][0]) * texture->mipmap[0][2];
2257 mip_edge0tc[1] = (clipped[DPSOFTRAST_ARRAY_TEXCOORD0][0][1] - clipped[DPSOFTRAST_ARRAY_TEXCOORD0][1][1]) * texture->mipmap[0][3];
2258 mip_edge1tc[0] = (clipped[DPSOFTRAST_ARRAY_TEXCOORD0][2][0] - clipped[DPSOFTRAST_ARRAY_TEXCOORD0][1][0]) * texture->mipmap[0][2];
2259 mip_edge1tc[1] = (clipped[DPSOFTRAST_ARRAY_TEXCOORD0][2][1] - clipped[DPSOFTRAST_ARRAY_TEXCOORD0][1][1]) * texture->mipmap[0][3];
2260 mip_edge0mip = (mip_edge0tc[0]*mip_edge0tc[0]+mip_edge0tc[1]*mip_edge0tc[1]) * mip_edge0xymul;
2261 mip_edge1mip = (mip_edge1tc[0]*mip_edge1tc[0]+mip_edge1tc[1]*mip_edge1tc[1]) * mip_edge1xymul;
2262 // this will be multiplied in the texturing routine by the texture resolution
2263 mipdensity = mip_edge0mip < mip_edge1mip ? mip_edge0mip : mip_edge1mip;
2264 y = (int)(log(mipdensity)/log(2) + 0.5f);
2267 if (y > texture->mipmaps - 1)
2268 y = texture->mipmaps - 1;
2272 // iterate potential spans
2273 // TODO: optimize? if we figured out the edge order beforehand, this
2274 // could do loops over the edges in the proper order rather than
2275 // selecting them for each span
2276 // TODO: optimize? the edges could have data slopes calculated
2277 // TODO: optimize? the data slopes could be calculated as a plane
2278 // (2D slopes) to avoid any interpolation along edges at all
2279 for (y = extent[1];y < extent[3];y++)
2281 // get center of pixel y
2283 // do the compares all at once
2284 screenyless[0] = y <= screeny[0];
2285 screenyless[1] = y <= screeny[1];
2286 screenyless[2] = y <= screeny[2];
2287 screenyless[3] = y <= screeny[3];
2290 switch(screenyless[0] + screenyless[1] * 2 + screenyless[2] * 4 + screenyless[3] * 8)
2292 case 0: /*0000*/ continue;
2293 case 1: /*1000*/ edge0p = 3;edge0n = 0;edge1p = 0;edge1n = 1;break;
2294 case 2: /*0100*/ edge0p = 0;edge0n = 1;edge1p = 1;edge1n = 2;break;
2295 case 3: /*1100*/ edge0p = 3;edge0n = 0;edge1p = 1;edge1n = 2;break;
2296 case 4: /*0010*/ edge0p = 1;edge0n = 2;edge1p = 2;edge1n = 3;break;
2297 case 5: /*1010*/ edge0p = 1;edge0n = 2;edge1p = 2;edge1n = 3;break; // concave - nonsense
2298 case 6: /*0110*/ edge0p = 0;edge0n = 1;edge1p = 2;edge1n = 3;break;
2299 case 7: /*1110*/ edge0p = 3;edge0n = 0;edge1p = 2;edge1n = 3;break;
2300 case 8: /*0001*/ edge0p = 2;edge0n = 3;edge1p = 3;edge1n = 0;break;
2301 case 9: /*1001*/ edge0p = 2;edge0n = 3;edge1p = 0;edge1n = 1;break;
2302 case 10: /*0101*/ edge0p = 2;edge0n = 3;edge1p = 1;edge1n = 2;break; // concave - nonsense
2303 case 11: /*1101*/ edge0p = 2;edge0n = 3;edge1p = 1;edge1n = 2;break;
2304 case 12: /*0011*/ edge0p = 1;edge0n = 2;edge1p = 3;edge1n = 0;break;
2305 case 13: /*1011*/ edge0p = 1;edge0n = 2;edge1p = 0;edge1n = 1;break;
2306 case 14: /*0111*/ edge0p = 0;edge0n = 1;edge1p = 3;edge1n = 0;break;
2307 case 15: /*1111*/ continue;
2312 switch(screenyless[0] + screenyless[1] * 2 + screenyless[2] * 4)
2314 case 0: /*000*/ continue;
2315 case 1: /*100*/ edge0p = 2;edge0n = 0;edge1p = 0;edge1n = 1;break;
2316 case 2: /*010*/ edge0p = 0;edge0n = 1;edge1p = 1;edge1n = 2;break;
2317 case 3: /*110*/ edge0p = 2;edge0n = 0;edge1p = 1;edge1n = 2;break;
2318 case 4: /*001*/ edge0p = 1;edge0n = 2;edge1p = 2;edge1n = 0;break;
2319 case 5: /*101*/ edge0p = 1;edge0n = 2;edge1p = 0;edge1n = 1;break;
2320 case 6: /*011*/ edge0p = 0;edge0n = 1;edge1p = 2;edge1n = 0;break;
2321 case 7: /*111*/ continue;
2331 for (j = 0, k = numpoints-1;j < numpoints;k = j, j++)
2333 if (screenyless[k] && !screenyless[j])
2339 else if (screenyless[j] && !screenyless[k])
2346 if (foundedges != 3)
2348 if (cedge0p != edge0p || cedge0n != edge0n || cedge1p != edge1p || cedge1n != edge1n)
2351 printf("case %i%i%i%i is broken %i %i %i %i != %i %i %i %i\n", screenyless[0], screenyless[1], screenyless[2], screenyless[3], cedge0p, cedge0n, cedge1p, cedge1n, edge0p, edge0n, edge1p, edge1n);
2353 printf("case %i%i%i is broken %i %i %i %i != %i %i %i %i\n", screenyless[0], screenyless[1], screenyless[2], cedge0p, cedge0n, cedge1p, cedge1n, edge0p, edge0n, edge1p, edge1n);
2357 edge0ylerp = (yc - screen[edge0p][1]) / (screen[edge0n][1] - screen[edge0p][1]);
2358 edge1ylerp = (yc - screen[edge1p][1]) / (screen[edge1n][1] - screen[edge1p][1]);
2359 if (edge0ylerp < 0 || edge0ylerp > 1 || edge1ylerp < 0 || edge1ylerp > 1)
2361 edge0yilerp = 1.0f - edge0ylerp;
2362 edge1yilerp = 1.0f - edge1ylerp;
2363 edge0xf = screen[edge0p][0] * edge0yilerp + screen[edge0n][0] * edge0ylerp;
2364 edge1xf = screen[edge1p][0] * edge1yilerp + screen[edge1n][0] * edge1ylerp;
2365 if (edge0xf < edge1xf)
2375 startx = (int)ceil(startxf);
2376 endx = (int)ceil(endxf);
2383 if (startxf > startx || endxf < endx-1) { printf("%s:%i X wrong (%i to %i is outside %f to %f)\n", __FILE__, __LINE__, startx, endx, startxf, endxf); }
2384 spanilength = 1.0f / (endxf - startxf);
2385 startxlerp = startx - startxf;
2386 span = &dpsoftrast.draw.spanqueue[dpsoftrast.draw.numspans++];
2387 memcpy(span->mip, mip, sizeof(span->mip));
2388 span->start = y * width + startx;
2389 span->length = endx - startx;
2390 j = DPSOFTRAST_ARRAY_TOTAL;
2391 if (edge0xf < edge1xf)
2393 span->data[0][j][0] = screen[edge0p][0] * edge0yilerp + screen[edge0n][0] * edge0ylerp;
2394 span->data[0][j][1] = screen[edge0p][1] * edge0yilerp + screen[edge0n][1] * edge0ylerp;
2395 span->data[0][j][2] = screen[edge0p][2] * edge0yilerp + screen[edge0n][2] * edge0ylerp;
2396 span->data[0][j][3] = screen[edge0p][3] * edge0yilerp + screen[edge0n][3] * edge0ylerp;
2397 span->data[1][j][0] = screen[edge1p][0] * edge1yilerp + screen[edge1n][0] * edge1ylerp;
2398 span->data[1][j][1] = screen[edge1p][1] * edge1yilerp + screen[edge1n][1] * edge1ylerp;
2399 span->data[1][j][2] = screen[edge1p][2] * edge1yilerp + screen[edge1n][2] * edge1ylerp;
2400 span->data[1][j][3] = screen[edge1p][3] * edge1yilerp + screen[edge1n][3] * edge1ylerp;
2401 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
2405 span->data[0][j][0] = proj[j][edge0p][0] * edge0yilerp + proj[j][edge0n][0] * edge0ylerp;
2406 span->data[0][j][1] = proj[j][edge0p][1] * edge0yilerp + proj[j][edge0n][1] * edge0ylerp;
2407 span->data[0][j][2] = proj[j][edge0p][2] * edge0yilerp + proj[j][edge0n][2] * edge0ylerp;
2408 span->data[0][j][3] = proj[j][edge0p][3] * edge0yilerp + proj[j][edge0n][3] * edge0ylerp;
2409 span->data[1][j][0] = proj[j][edge1p][0] * edge1yilerp + proj[j][edge1n][0] * edge1ylerp;
2410 span->data[1][j][1] = proj[j][edge1p][1] * edge1yilerp + proj[j][edge1n][1] * edge1ylerp;
2411 span->data[1][j][2] = proj[j][edge1p][2] * edge1yilerp + proj[j][edge1n][2] * edge1ylerp;
2412 span->data[1][j][3] = proj[j][edge1p][3] * edge1yilerp + proj[j][edge1n][3] * edge1ylerp;
2418 span->data[0][j][0] = screen[edge1p][0] * edge1yilerp + screen[edge1n][0] * edge1ylerp;
2419 span->data[0][j][1] = screen[edge1p][1] * edge1yilerp + screen[edge1n][1] * edge1ylerp;
2420 span->data[0][j][2] = screen[edge1p][2] * edge1yilerp + screen[edge1n][2] * edge1ylerp;
2421 span->data[0][j][3] = screen[edge1p][3] * edge1yilerp + screen[edge1n][3] * edge1ylerp;
2422 span->data[1][j][0] = screen[edge0p][0] * edge0yilerp + screen[edge0n][0] * edge0ylerp;
2423 span->data[1][j][1] = screen[edge0p][1] * edge0yilerp + screen[edge0n][1] * edge0ylerp;
2424 span->data[1][j][2] = screen[edge0p][2] * edge0yilerp + screen[edge0n][2] * edge0ylerp;
2425 span->data[1][j][3] = screen[edge0p][3] * edge0yilerp + screen[edge0n][3] * edge0ylerp;
2426 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
2430 span->data[0][j][0] = proj[j][edge1p][0] * edge1yilerp + proj[j][edge1n][0] * edge1ylerp;
2431 span->data[0][j][1] = proj[j][edge1p][1] * edge1yilerp + proj[j][edge1n][1] * edge1ylerp;
2432 span->data[0][j][2] = proj[j][edge1p][2] * edge1yilerp + proj[j][edge1n][2] * edge1ylerp;
2433 span->data[0][j][3] = proj[j][edge1p][3] * edge1yilerp + proj[j][edge1n][3] * edge1ylerp;
2434 span->data[1][j][0] = proj[j][edge0p][0] * edge0yilerp + proj[j][edge0n][0] * edge0ylerp;
2435 span->data[1][j][1] = proj[j][edge0p][1] * edge0yilerp + proj[j][edge0n][1] * edge0ylerp;
2436 span->data[1][j][2] = proj[j][edge0p][2] * edge0yilerp + proj[j][edge0n][2] * edge0ylerp;
2437 span->data[1][j][3] = proj[j][edge0p][3] * edge0yilerp + proj[j][edge0n][3] * edge0ylerp;
2441 // change data[1][n][] to be a data slope
2442 j = DPSOFTRAST_ARRAY_TOTAL;
2443 span->data[1][j][0] = (span->data[1][j][0] - span->data[0][j][0]) * spanilength;
2444 span->data[1][j][1] = (span->data[1][j][1] - span->data[0][j][1]) * spanilength;
2445 span->data[1][j][2] = (span->data[1][j][2] - span->data[0][j][2]) * spanilength;
2446 span->data[1][j][3] = (span->data[1][j][3] - span->data[0][j][3]) * spanilength;
2447 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
2451 span->data[1][j][0] = (span->data[1][j][0] - span->data[0][j][0]) * spanilength;
2452 span->data[1][j][1] = (span->data[1][j][1] - span->data[0][j][1]) * spanilength;
2453 span->data[1][j][2] = (span->data[1][j][2] - span->data[0][j][2]) * spanilength;
2454 span->data[1][j][3] = (span->data[1][j][3] - span->data[0][j][3]) * spanilength;
2457 // adjust the data[0][n][] to be correct for the pixel centers
2458 // this also handles horizontal clipping where a major part of the
2459 // span may be off the left side of the screen
2460 j = DPSOFTRAST_ARRAY_TOTAL;
2461 span->data[0][j][0] += span->data[1][j][0] * startxlerp;
2462 span->data[0][j][1] += span->data[1][j][1] * startxlerp;
2463 span->data[0][j][2] += span->data[1][j][2] * startxlerp;
2464 span->data[0][j][3] += span->data[1][j][3] * startxlerp;
2465 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
2469 span->data[0][j][0] += span->data[1][j][0] * startxlerp;
2470 span->data[0][j][1] += span->data[1][j][1] * startxlerp;
2471 span->data[0][j][2] += span->data[1][j][2] * startxlerp;
2472 span->data[0][j][3] += span->data[1][j][3] * startxlerp;
2475 // to keep the shader routines from needing more than a small
2476 // buffer for pixel intermediate data, we split long spans...
2477 while (span->length > DPSOFTRAST_DRAW_MAXSPANLENGTH)
2479 span->length = DPSOFTRAST_DRAW_MAXSPANLENGTH;
2480 if (dpsoftrast.draw.numspans >= DPSOFTRAST_DRAW_MAXSPANQUEUE)
2482 DPSOFTRAST_Draw_ProcessSpans();
2483 dpsoftrast.draw.numspans = 0;
2486 span = &dpsoftrast.draw.spanqueue[dpsoftrast.draw.numspans++];
2488 startx += DPSOFTRAST_DRAW_MAXSPANLENGTH;
2489 span->start = y * width + startx;
2490 span->length = endx - startx;
2491 j = DPSOFTRAST_ARRAY_TOTAL;
2492 span->data[0][j][0] += span->data[1][j][0] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
2493 span->data[0][j][1] += span->data[1][j][1] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
2494 span->data[0][j][2] += span->data[1][j][2] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
2495 span->data[0][j][3] += span->data[1][j][3] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
2496 for (j = 0;j < DPSOFTRAST_ARRAY_TOTAL;j++)
2500 span->data[0][j][0] += span->data[1][j][0] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
2501 span->data[0][j][1] += span->data[1][j][1] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
2502 span->data[0][j][2] += span->data[1][j][2] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
2503 span->data[0][j][3] += span->data[1][j][3] * DPSOFTRAST_DRAW_MAXSPANLENGTH;
2507 // after all that, we have a span suitable for the pixel shader...
2508 if (dpsoftrast.draw.numspans >= DPSOFTRAST_DRAW_MAXSPANQUEUE)
2510 DPSOFTRAST_Draw_ProcessSpans();
2511 dpsoftrast.draw.numspans = 0;
2514 // draw outlines over triangle for debugging
2515 // for (j = 0, k = numpoints-1;j < numpoints;k = j, j++)
2516 // DPSOFTRAST_Draw_DebugEdgePoints(screen[k], screen[j]);
2518 if (dpsoftrast.draw.numspans)
2520 DPSOFTRAST_Draw_ProcessSpans();
2521 dpsoftrast.draw.numspans = 0;
2525 void DPSOFTRAST_Draw_DebugPoints(void)
2530 int numvertices = dpsoftrast.draw.numvertices;
2531 int w = dpsoftrast.fb_width;
2533 unsigned int *pixels = dpsoftrast.fb_colorpixels[0];
2535 bounds[0] = dpsoftrast.fb_viewportscissor[0];
2536 bounds[1] = dpsoftrast.fb_viewportscissor[1];
2537 bounds[2] = dpsoftrast.fb_viewportscissor[0] + dpsoftrast.fb_viewportscissor[2];
2538 bounds[3] = dpsoftrast.fb_viewportscissor[1] + dpsoftrast.fb_viewportscissor[3];
2539 for (i = 0;i < numvertices;i++)
2542 //if (dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+3] != 1.0f)
2544 x = (int)(dpsoftrast.draw.screencoord4f[i*4+0]);
2545 y = (int)(dpsoftrast.draw.screencoord4f[i*4+1]);
2546 //x = (int)(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+0] + 0.5f);
2547 //y = (int)(dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+1] + 0.5f);
2548 //x = (int)((dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+0] + 1.0f) * dpsoftrast.fb_width * 0.5f + 0.5f);
2549 //y = (int)((dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION][i*4+1] + 1.0f) * dpsoftrast.fb_height * 0.5f + 0.5f);
2550 if (x < bounds[0] || y < bounds[1] || x >= bounds[2] || y >= bounds[3])
2552 c4f = dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_COLOR] + i*4;
2553 pixels[y*w+x] = DPSOFTRAST_BGRA8_FROM_RGBA32F(c4f[0], c4f[1], c4f[2], c4f[3]);
2557 void DPSOFTRAST_DrawTriangles(int firstvertex, int numvertices, int numtriangles, const int *element3i, const unsigned short *element3s)
2559 unsigned char arraymask[DPSOFTRAST_ARRAY_TOTAL];
2560 arraymask[0] = true;
2561 arraymask[1] = dpsoftrast.fb_colorpixels[0] != NULL; // TODO: optimize (decide based on shadermode)
2562 arraymask[2] = dpsoftrast.pointer_texcoordf[0] != NULL;
2563 arraymask[3] = dpsoftrast.pointer_texcoordf[1] != NULL;
2564 arraymask[4] = dpsoftrast.pointer_texcoordf[2] != NULL;
2565 arraymask[5] = dpsoftrast.pointer_texcoordf[3] != NULL;
2566 arraymask[6] = dpsoftrast.pointer_texcoordf[4] != NULL;
2567 arraymask[7] = dpsoftrast.pointer_texcoordf[5] != NULL;
2568 arraymask[8] = dpsoftrast.pointer_texcoordf[6] != NULL;
2569 arraymask[9] = dpsoftrast.pointer_texcoordf[7] != NULL;
2570 DPSOFTRAST_Validate(DPSOFTRAST_VALIDATE_DRAW);
2571 DPSOFTRAST_Draw_LoadVertices(firstvertex, numvertices, true);
2572 DPSOFTRAST_Draw_VertexShader();
2573 DPSOFTRAST_Draw_ProjectVertices(dpsoftrast.draw.screencoord4f, dpsoftrast.draw.post_array4f[DPSOFTRAST_ARRAY_POSITION], numvertices);
2574 DPSOFTRAST_Draw_ProcessTriangles(firstvertex, numvertices, numtriangles, element3i, element3s, arraymask);
2577 void DPSOFTRAST_Init(int width, int height, unsigned int *colorpixels, unsigned int *depthpixels)
2586 memset(&dpsoftrast, 0, sizeof(dpsoftrast));
2587 dpsoftrast.bigendian = u.b[3];
2588 dpsoftrast.fb_width = width;
2589 dpsoftrast.fb_height = height;
2590 dpsoftrast.fb_depthpixels = depthpixels;
2591 dpsoftrast.fb_colorpixels[0] = colorpixels;
2592 dpsoftrast.fb_colorpixels[1] = NULL;
2593 dpsoftrast.fb_colorpixels[1] = NULL;
2594 dpsoftrast.fb_colorpixels[1] = NULL;
2595 dpsoftrast.texture_firstfree = 1;
2596 dpsoftrast.texture_end = 1;
2597 dpsoftrast.texture_max = 0;
2598 dpsoftrast.user.colormask[0] = 1;
2599 dpsoftrast.user.colormask[1] = 1;
2600 dpsoftrast.user.colormask[2] = 1;
2601 dpsoftrast.user.colormask[3] = 1;
2602 dpsoftrast.user.blendfunc[0] = GL_ONE;
2603 dpsoftrast.user.blendfunc[1] = GL_ZERO;
2604 dpsoftrast.user.depthmask = true;
2605 dpsoftrast.user.depthtest = true;
2606 dpsoftrast.user.depthfunc = GL_LEQUAL;
2607 dpsoftrast.user.scissortest = false;
2608 dpsoftrast.user.cullface = GL_BACK;
2609 dpsoftrast.user.alphatest = false;
2610 dpsoftrast.user.alphafunc = GL_GREATER;
2611 dpsoftrast.user.alphavalue = 0.5f;
2612 dpsoftrast.user.scissor[0] = 0;
2613 dpsoftrast.user.scissor[1] = 0;
2614 dpsoftrast.user.scissor[2] = dpsoftrast.fb_width;
2615 dpsoftrast.user.scissor[3] = dpsoftrast.fb_height;
2616 dpsoftrast.user.viewport[0] = 0;
2617 dpsoftrast.user.viewport[1] = 0;
2618 dpsoftrast.user.viewport[2] = dpsoftrast.fb_width;
2619 dpsoftrast.user.viewport[3] = dpsoftrast.fb_height;
2620 dpsoftrast.user.depthrange[0] = 0;
2621 dpsoftrast.user.depthrange[1] = 1;
2622 dpsoftrast.user.polygonoffset[0] = 0;
2623 dpsoftrast.user.polygonoffset[1] = 0;
2624 dpsoftrast.user.color[0] = 1;
2625 dpsoftrast.user.color[1] = 1;
2626 dpsoftrast.user.color[2] = 1;
2627 dpsoftrast.user.color[3] = 1;
2628 dpsoftrast.validate = -1;
2629 DPSOFTRAST_Validate(-1);
2630 dpsoftrast.validate = 0;
2633 void DPSOFTRAST_Shutdown(void)
2636 for (i = 0;i < dpsoftrast.texture_end;i++)
2637 if (dpsoftrast.texture[i].bytes)
2638 free(dpsoftrast.texture[i].bytes);
2639 if (dpsoftrast.texture)
2640 free(dpsoftrast.texture);
2641 memset(&dpsoftrast, 0, sizeof(dpsoftrast));