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1 | typedef union { |
2 | float f; | |
3 | int i; | |
4 | } fi_type; | |
5 | static __inline__ | |
6 | int IS_INF_OR_NAN(float x) | |
7 | { | |
8 | fi_type tmp; | |
9 | tmp.f = x; | |
10 | return !(int)((unsigned int)((tmp.i & 0x7fffffff) - 0x7f800000) >> 31); | |
11 | } | |
12 | ||
13 | typedef enum { | |
14 | MESA_FORMAT_RGBA8888, MESA_FORMAT_RGB888, | |
15 | } gl_format; | |
16 | typedef enum { | |
17 | FRAG_ATTRIB_WPOS = 0, FRAG_ATTRIB_COL0 = 1, FRAG_ATTRIB_COL1 = | |
18 | 2, FRAG_ATTRIB_FOGC = 3, FRAG_ATTRIB_TEX0 = 4, FRAG_ATTRIB_TEX1 = | |
19 | 5, FRAG_ATTRIB_TEX2 = 6, FRAG_ATTRIB_TEX3 = 7, FRAG_ATTRIB_TEX4 = | |
20 | 8, FRAG_ATTRIB_TEX5 = 9, FRAG_ATTRIB_TEX6 = 10, FRAG_ATTRIB_TEX7 = | |
21 | 11, FRAG_ATTRIB_FACE = 12, FRAG_ATTRIB_PNTC = 13, FRAG_ATTRIB_VAR0 = | |
22 | 14, FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + 16) | |
23 | } gl_frag_result; | |
24 | struct gl_config { | |
25 | int depthBits; | |
26 | }; | |
27 | struct gl_lightmodel { | |
28 | unsigned int ColorControl; | |
29 | }; | |
30 | struct gl_depthbuffer_attrib { | |
31 | unsigned int Func; | |
32 | unsigned char Mask; | |
33 | }; | |
34 | struct gl_hint_attrib { | |
35 | unsigned int PerspectiveCorrection; | |
36 | }; | |
37 | struct gl_light_attrib { | |
38 | struct gl_lightmodel Model; | |
39 | }; | |
40 | struct gl_polygon_attrib { | |
41 | unsigned char StippleFlag; | |
42 | }; | |
43 | typedef enum { | |
44 | TEXTURE_BUFFER_INDEX, TEXTURE_2D_ARRAY_INDEX, TEXTURE_1D_ARRAY_INDEX, | |
45 | TEXTURE_CUBE_INDEX, TEXTURE_3D_INDEX, TEXTURE_RECT_INDEX, | |
46 | TEXTURE_2D_INDEX, TEXTURE_1D_INDEX, NUM_TEXTURE_TARGETS | |
47 | } gl_texture_index; | |
48 | struct gl_texture_image { | |
49 | unsigned int Border; | |
50 | unsigned int Width; | |
51 | unsigned int Height; | |
52 | unsigned int WidthLog2; | |
53 | unsigned char _IsPowerOfTwo; | |
54 | unsigned int RowStride; | |
55 | void *Data; | |
56 | }; | |
57 | typedef enum { | |
58 | MAX_FACES = 6 | |
59 | } gl_face_index; | |
60 | struct gl_sampler_object { | |
61 | unsigned int WrapS; | |
62 | unsigned int WrapT; | |
63 | }; | |
64 | struct gl_texture_object { | |
65 | struct gl_sampler_object Sampler; | |
66 | int BaseLevel; | |
67 | unsigned int _Swizzle; | |
68 | struct gl_texture_image *Image[MAX_FACES][15]; | |
69 | }; | |
70 | struct gl_texture_unit { | |
71 | unsigned int _ReallyEnabled; | |
72 | unsigned int EnvMode; | |
73 | struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS]; | |
74 | }; | |
75 | struct gl_texture_attrib { | |
76 | struct gl_texture_unit Unit[(16 + 16)]; | |
77 | unsigned int _EnabledUnits; | |
78 | unsigned int _EnabledCoordUnits; | |
79 | }; | |
80 | struct gl_fragment_program_state { | |
81 | struct gl_fragment_program *_Current; | |
82 | }; | |
83 | struct gl_ati_fragment_shader_state { | |
84 | unsigned char _Enabled; | |
85 | }; | |
86 | struct gl_renderbuffer { | |
87 | void (*PutRowRGB) (struct gl_context * ctx, struct gl_renderbuffer * rb, | |
88 | unsigned int count, int x, int y, const void *values); | |
89 | }; | |
90 | struct gl_framebuffer { | |
91 | struct gl_config Visual; | |
92 | struct gl_renderbuffer *_ColorDrawBuffers[8]; | |
93 | }; | |
94 | struct gl_context { | |
95 | struct gl_framebuffer *DrawBuffer; | |
96 | struct gl_depthbuffer_attrib Depth; | |
97 | struct gl_hint_attrib Hint; | |
98 | struct gl_light_attrib Light; | |
99 | struct gl_polygon_attrib Polygon; | |
100 | struct gl_texture_attrib Texture; | |
101 | struct gl_fragment_program_state FragmentProgram; | |
102 | struct gl_ati_fragment_shader_state ATIFragmentShader; | |
103 | unsigned int RenderMode; | |
104 | }; | |
105 | typedef struct { | |
106 | float attrib[FRAG_ATTRIB_MAX][4]; | |
107 | } SWvertex; | |
108 | typedef struct sw_span { | |
109 | int x, y; | |
110 | unsigned int end; | |
111 | float attrStepX[FRAG_ATTRIB_MAX][4]; | |
112 | int intTex[2], intTexStep[2]; | |
113 | } SWspan; | |
114 | typedef void (*swrast_tri_func) (struct gl_context * ctx, const SWvertex *, | |
115 | const SWvertex *, const SWvertex *); | |
116 | typedef struct { | |
117 | unsigned int _RasterMask; | |
118 | unsigned char _FogEnabled; | |
119 | swrast_tri_func Triangle; | |
120 | } SWcontext; | |
121 | static void simple_textured_triangle(struct gl_context *ctx, | |
122 | const SWvertex * v0, const SWvertex * v1, | |
123 | const SWvertex * v2) | |
124 | { | |
125 | typedef struct { | |
126 | float dx; | |
127 | float dy; | |
128 | int fsx; | |
129 | int fx0; | |
130 | int lines; | |
131 | } EdgeT; | |
132 | EdgeT eMaj; | |
133 | EdgeT eTop; | |
134 | EdgeT eBot; | |
135 | float oneOverArea; | |
136 | const SWvertex *vMin; | |
137 | const SWvertex *vMid; | |
138 | const SWvertex *vMax; | |
139 | const int snapMask = ~(((1 << 11) / (1 << 4)) - 1); | |
140 | int vMin_fx; | |
141 | int vMin_fy; | |
142 | int vMid_fx; | |
143 | int vMid_fy; | |
144 | int vMax_fx; | |
145 | int vMax_fy; | |
146 | SWspan span; | |
147 | const int fy0 = | |
148 | (((int) | |
149 | ((((v0->attrib[FRAG_ATTRIB_WPOS][1] - | |
150 | 0.5F) * ((float)(1 << 11))) >= | |
151 | 0.0F) ? (((v0->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) * | |
152 | ((float)(1 << 11))) + | |
153 | 0.5F) | |
154 | : (((v0->attrib[FRAG_ATTRIB_WPOS][1] - | |
155 | 0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask; | |
156 | const int fy1 = | |
157 | (((int) | |
158 | ((((v1->attrib[FRAG_ATTRIB_WPOS][1] - | |
159 | 0.5F) * ((float)(1 << 11))) >= | |
160 | 0.0F) ? (((v1->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) * | |
161 | ((float)(1 << 11))) + | |
162 | 0.5F) | |
163 | : (((v1->attrib[FRAG_ATTRIB_WPOS][1] - | |
164 | 0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask; | |
165 | const int fy2 = | |
166 | (((int) | |
167 | ((((v2->attrib[FRAG_ATTRIB_WPOS][1] - | |
168 | 0.5F) * ((float)(1 << 11))) >= | |
169 | 0.0F) ? (((v2->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) * | |
170 | ((float)(1 << 11))) + | |
171 | 0.5F) | |
172 | : (((v2->attrib[FRAG_ATTRIB_WPOS][1] - | |
173 | 0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask; | |
174 | if (fy0 <= fy1) { | |
175 | if (fy1 <= fy2) { | |
176 | vMin = v0; | |
177 | vMax = v1; | |
178 | vMin_fy = fy0; | |
179 | } | |
180 | } | |
181 | vMin_fx = | |
182 | (((int) | |
183 | ((((vMin->attrib[FRAG_ATTRIB_WPOS][0] + | |
184 | 0.5F) * ((float)(1 << 11))) >= | |
185 | 0.0F) ? (((vMin->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) * | |
186 | ((float)(1 << 11))) + | |
187 | 0.5F) | |
188 | : (((vMin->attrib[FRAG_ATTRIB_WPOS][0] + | |
189 | 0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask; | |
190 | vMid_fx = | |
191 | (((int) | |
192 | ((((vMid->attrib[FRAG_ATTRIB_WPOS][0] + | |
193 | 0.5F) * ((float)(1 << 11))) >= | |
194 | 0.0F) ? (((vMid->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) * | |
195 | ((float)(1 << 11))) + | |
196 | 0.5F) | |
197 | : (((vMid->attrib[FRAG_ATTRIB_WPOS][0] + | |
198 | 0.5F) * ((float)(1 << 11))) - 0.5F)))) & snapMask; | |
199 | eMaj.dx = ((vMax_fx - vMin_fx) * (1.0F / ((float)(1 << 11)))); | |
200 | eMaj.dy = ((vMax_fy - vMin_fy) * (1.0F / ((float)(1 << 11)))); | |
201 | eTop.dx = ((vMax_fx - vMid_fx) * (1.0F / ((float)(1 << 11)))); | |
202 | eBot.dy = ((vMid_fy - vMin_fy) * (1.0F / ((float)(1 << 11)))); | |
203 | const float area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy; | |
204 | if (IS_INF_OR_NAN(area) || area == 0.0F) | |
205 | return; | |
206 | oneOverArea = 1.0F / area; | |
207 | if (eBot.lines > 0) { | |
208 | eBot.fx0 = vMin_fx; | |
209 | } | |
210 | int scan_from_left_to_right; | |
211 | struct gl_renderbuffer *rb = | |
212 | ctx->DrawBuffer->_ColorDrawBuffers[0]; | |
213 | const struct gl_texture_object *obj = | |
214 | ctx->Texture.Unit[0].CurrentTex[TEXTURE_2D_INDEX]; | |
215 | const struct gl_texture_image *texImg = | |
216 | obj->Image[0][obj->BaseLevel]; | |
217 | const float twidth = (float) texImg->Width; | |
218 | const int twidth_log2 = texImg->WidthLog2; | |
219 | const unsigned char *texture = (const unsigned char *)texImg->Data; | |
220 | const int smask = texImg->Width - 1; | |
221 | const int tmask = texImg->Height - 1; | |
222 | if (!rb || !texture) { | |
223 | return; | |
224 | } | |
225 | float eMaj_ds = | |
226 | (vMax->attrib[FRAG_ATTRIB_TEX0][0] - | |
227 | vMin->attrib[FRAG_ATTRIB_TEX0][0]) * twidth; | |
228 | float eBot_ds = | |
229 | (vMid->attrib[FRAG_ATTRIB_TEX0][0] - | |
230 | vMin->attrib[FRAG_ATTRIB_TEX0][0]) * twidth; | |
231 | span.attrStepX[FRAG_ATTRIB_TEX0][0] = | |
232 | oneOverArea * (eMaj_ds * eBot.dy - | |
233 | eMaj.dy * eBot_ds); | |
234 | span.intTexStep[0] = | |
235 | (((int) | |
236 | ((((span.attrStepX[FRAG_ATTRIB_TEX0][0]) * | |
237 | ((float)(1 << 11))) >= | |
238 | 0.0F) ? (((span.attrStepX[FRAG_ATTRIB_TEX0][0]) | |
239 | * ((float)(1 << 11))) + | |
240 | 0.5F) | |
241 | : (((span.attrStepX[FRAG_ATTRIB_TEX0][0]) * | |
242 | ((float)(1 << 11))) - 0.5F)))); | |
243 | int subTriangle; | |
244 | int fxLeftEdge = 0; | |
245 | int fxRightEdge = 0; | |
246 | int sLeft = 0; | |
247 | for (subTriangle = 0; subTriangle <= 1; subTriangle++) { | |
248 | EdgeT *eRight; | |
249 | int lines; | |
250 | if (subTriangle == 0) { | |
251 | if (scan_from_left_to_right) { | |
252 | eRight = &eBot; | |
253 | lines = eRight->lines; | |
254 | } else { | |
255 | eRight = &eMaj; | |
256 | } | |
257 | } else { | |
258 | if (scan_from_left_to_right) { | |
259 | eRight = &eTop; | |
260 | } | |
261 | fxRightEdge = eRight->fsx - 1; | |
262 | } | |
263 | while (lines > 0) { | |
264 | const int right= fxRightEdge >> 11; | |
265 | span.x = fxLeftEdge >> 11; | |
266 | if (right <= span.x) | |
267 | span.end = 0; | |
268 | else | |
269 | span.end = right - span.x; | |
270 | span.intTex[0] = sLeft; | |
271 | if (span.end > 0 && span.y >= 0) { | |
272 | unsigned int i; | |
273 | unsigned char rgb[16384][3]; | |
274 | for (i = 0; | |
275 | i < span.end; | |
276 | i++) { | |
277 | int s = | |
278 | ((span. | |
279 | intTex[0]) | |
280 | >> 11) & | |
281 | smask; | |
282 | int t = | |
283 | ((span. | |
284 | intTex[1]) | |
285 | >> 11) & | |
286 | tmask; | |
287 | int pos = | |
288 | (t << | |
289 | twidth_log2) | |
290 | + s; | |
291 | rgb[i][0] = | |
292 | texture[pos | |
293 | + | |
294 | 2]; | |
295 | span. | |
296 | intTex[0] += | |
297 | span. | |
298 | intTexStep | |
299 | [0]; | |
300 | } | |
301 | rb->PutRowRGB(ctx, rb, | |
302 | span.end, | |
303 | span.x, | |
304 | span.y, | |
305 | rgb); | |
306 | } | |
307 | } | |
308 | } | |
309 | } | |
310 | ||
311 | void _swrast_choose_triangle(struct gl_context *ctx) | |
312 | { | |
313 | SWcontext *swrast = SWRAST_CONTEXT(ctx); | |
314 | if (ctx->RenderMode == 0x1C00) { | |
315 | if (ctx->Texture._EnabledCoordUnits | |
316 | || ctx->FragmentProgram._Current | |
317 | || ctx->ATIFragmentShader._Enabled | |
318 | || _mesa_need_secondary_color(ctx) || swrast->_FogEnabled) { | |
319 | const struct gl_texture_object *texObj2D; | |
320 | const struct gl_texture_image *texImg; | |
321 | unsigned int minFilter; | |
322 | unsigned int magFilter; | |
323 | unsigned int envMode; | |
324 | gl_format format; | |
325 | if (ctx->Texture._EnabledCoordUnits == 0x1 | |
326 | && !ctx->FragmentProgram._Current | |
327 | && !ctx->ATIFragmentShader._Enabled | |
328 | && ctx->Texture._EnabledUnits == 0x1 | |
329 | && ctx->Texture.Unit[0]._ReallyEnabled == | |
330 | (1 << TEXTURE_2D_INDEX) | |
331 | && texObj2D->Sampler.WrapS == 0x2901 | |
332 | && texObj2D->Sampler.WrapT == 0x2901 | |
333 | && texObj2D->_Swizzle == | |
334 | (((0) << 0) | ((1) << 3) | ((2) << 6) | ((3) << 9)) | |
335 | && texImg->_IsPowerOfTwo && texImg->Border == 0 | |
336 | && texImg->Width == texImg->RowStride | |
337 | && (format == MESA_FORMAT_RGB888 | |
338 | || format == MESA_FORMAT_RGBA8888) | |
339 | && minFilter == magFilter | |
340 | && ctx->Light.Model.ColorControl == 0x81F9 | |
341 | && !swrast->_FogEnabled | |
342 | && ctx->Texture.Unit[0].EnvMode != 0x8570 | |
343 | && ctx->Texture.Unit[0].EnvMode != 0x8503) { | |
344 | if (ctx->Hint.PerspectiveCorrection == 0x1101) { | |
345 | if (minFilter == 0x2600 | |
346 | && format == MESA_FORMAT_RGB888 | |
347 | && (envMode == 0x1E01 | |
348 | || envMode == 0x2101) | |
349 | && | |
350 | ((swrast->_RasterMask == | |
351 | (0x004 | 0x1000) | |
352 | && ctx->Depth.Func == 0x0201 | |
353 | && ctx->Depth.Mask == 0x1) | |
354 | || swrast->_RasterMask == 0x1000) | |
355 | && ctx->Polygon.StippleFlag == 0x0 | |
356 | && ctx->DrawBuffer->Visual. | |
357 | depthBits <= 16) { | |
358 | if (swrast->_RasterMask == | |
359 | (0x004 | 0x1000)) { | |
360 | swrast->Triangle = | |
361 | simple_textured_triangle; | |
362 | } | |
363 | } | |
364 | } | |
365 | } | |
366 | } | |
367 | } | |
368 | } |