s_aatritemp.h revision 8f95d790daee7c012364d689e7d86524340469c1
18f95d790daee7c012364d689e7d86524340469c1Brian Paul/* $Id: s_aatritemp.h,v 1.32 2003/01/20 00:25:17 brianp Exp $ */ 2e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 3e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell/* 4e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * Mesa 3-D graphics library 5610d59981a9f43fefe29b34ef19c184d28e2bef5Brian Paul * Version: 5.1 622144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * 78f95d790daee7c012364d689e7d86524340469c1Brian Paul * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. 822144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * 9e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * Permission is hereby granted, free of charge, to any person obtaining a 10e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * copy of this software and associated documentation files (the "Software"), 11e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * to deal in the Software without restriction, including without limitation 12e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * and/or sell copies of the Software, and to permit persons to whom the 14e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * Software is furnished to do so, subject to the following conditions: 1522144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * 16e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * The above copyright notice and this permission notice shall be included 17e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * in all copies or substantial portions of the Software. 1822144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * 19e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 23e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 24e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell */ 26e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 27e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 28e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell/* 29e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * Antialiased Triangle Rasterizer Template 30e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * 31e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * This file is #include'd to generate custom AA triangle rasterizers. 32e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * NOTE: this code hasn't been optimized yet. That'll come after it 33e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * works correctly. 34e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * 35e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * The following macros may be defined to indicate what auxillary information 36e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * must be copmuted across the triangle: 37e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * DO_Z - if defined, compute Z values 38e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * DO_RGBA - if defined, compute RGBA values 39e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * DO_INDEX - if defined, compute color index values 40e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * DO_SPEC - if defined, compute specular RGB values 41e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * DO_TEX - if defined, compute unit 0 STRQ texcoords 42e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * DO_MULTITEX - if defined, compute all unit's STRQ texcoords 43e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell */ 44e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 45e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell/*void triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv )*/ 46e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell{ 47cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat *p0 = v0->win; 48cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat *p1 = v1->win; 49cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat *p2 = v2->win; 50a852378a6289d154364dde440f89a39bbfc33e2dBrian Paul const SWvertex *vMin, *vMid, *vMax; 51ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLint iyMin, iyMax; 52ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLfloat yMin, yMax; 53ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLboolean ltor; 54ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLfloat majDx, majDy; /* major (i.e. long) edge dx and dy */ 5510f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 5677df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul struct sw_span span; 5710f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 58e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_Z 5947cf442c1164b6b406117fccfb8b564602741ee3Brian Paul GLfloat zPlane[4]; 6080532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#endif 6180532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#ifdef DO_FOG 62e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell GLfloat fogPlane[4]; 6380532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#else 6480532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul GLfloat *fog = NULL; 65e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 66e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_RGBA 6747cf442c1164b6b406117fccfb8b564602741ee3Brian Paul GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4]; 68e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 69e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_INDEX 7047cf442c1164b6b406117fccfb8b564602741ee3Brian Paul GLfloat iPlane[4]; 71e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 72e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_SPEC 7347cf442c1164b6b406117fccfb8b564602741ee3Brian Paul GLfloat srPlane[4], sgPlane[4], sbPlane[4]; 74e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 75e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_TEX 76e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell GLfloat sPlane[4], tPlane[4], uPlane[4], vPlane[4]; 77e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell GLfloat texWidth, texHeight; 78e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#elif defined(DO_MULTITEX) 79610d59981a9f43fefe29b34ef19c184d28e2bef5Brian Paul GLfloat sPlane[MAX_TEXTURE_COORD_UNITS][4]; /* texture S */ 80610d59981a9f43fefe29b34ef19c184d28e2bef5Brian Paul GLfloat tPlane[MAX_TEXTURE_COORD_UNITS][4]; /* texture T */ 81610d59981a9f43fefe29b34ef19c184d28e2bef5Brian Paul GLfloat uPlane[MAX_TEXTURE_COORD_UNITS][4]; /* texture R */ 82610d59981a9f43fefe29b34ef19c184d28e2bef5Brian Paul GLfloat vPlane[MAX_TEXTURE_COORD_UNITS][4]; /* texture Q */ 83610d59981a9f43fefe29b34ef19c184d28e2bef5Brian Paul GLfloat texWidth[MAX_TEXTURE_COORD_UNITS]; 84610d59981a9f43fefe29b34ef19c184d28e2bef5Brian Paul GLfloat texHeight[MAX_TEXTURE_COORD_UNITS]; 85e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 86ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLfloat bf = SWRAST_CONTEXT(ctx)->_backface_sign; 8710f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 8810f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 89b7f5e92f1749ce4601a758f66ddc64959f11742bBrian Paul INIT_SPAN(span, GL_POLYGON, 0, 0, SPAN_COVERAGE); 902a182a98973edc9ecf2936b1288485bb2b3fa722Brian Paul 91e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell /* determine bottom to top order of vertices */ 92e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell { 93cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell GLfloat y0 = v0->win[1]; 94cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell GLfloat y1 = v1->win[1]; 95cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell GLfloat y2 = v2->win[1]; 96e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell if (y0 <= y1) { 97e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell if (y1 <= y2) { 98e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell vMin = v0; vMid = v1; vMax = v2; /* y0<=y1<=y2 */ 99e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 100e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell else if (y2 <= y0) { 101e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell vMin = v2; vMid = v0; vMax = v1; /* y2<=y0<=y1 */ 102e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 103e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell else { 104e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell vMin = v0; vMid = v2; vMax = v1; bf = -bf; /* y0<=y2<=y1 */ 105e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 106e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 107e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell else { 108e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell if (y0 <= y2) { 109e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell vMin = v1; vMid = v0; vMax = v2; bf = -bf; /* y1<=y0<=y2 */ 110e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 111e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell else if (y2 <= y1) { 112e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell vMin = v2; vMid = v1; vMax = v0; bf = -bf; /* y2<=y1<=y0 */ 113e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 114e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell else { 115e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell vMin = v1; vMid = v2; vMax = v0; /* y1<=y2<=y0 */ 116e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 117e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 118e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 119e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 120ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul majDx = vMax->win[0] - vMin->win[0]; 121ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul majDy = vMax->win[1] - vMin->win[1]; 122ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul 123ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul { 124ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat botDx = vMid->win[0] - vMin->win[0]; 125ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat botDy = vMid->win[1] - vMin->win[1]; 126ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat area = majDx * botDy - botDx * majDy; 127ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul ltor = (GLboolean) (area < 0.0F); 128ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* Do backface culling */ 129ef4f5b391e560e535b25b372f797e41edeef09f1Keith Whitwell if (area * bf < 0 || area == 0 || IS_INF_OR_NAN(area)) 130ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul return; 131ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 132e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 133e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifndef DO_OCCLUSION_TEST 134e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell ctx->OcclusionResult = GL_TRUE; 135e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 136e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 13780532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul /* Plane equation setup: 13880532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul * We evaluate plane equations at window (x,y) coordinates in order 13980532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul * to compute color, Z, fog, texcoords, etc. This isn't terribly 140ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul * efficient but it's easy and reliable. 14180532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul */ 142e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_Z 143e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell compute_plane(p0, p1, p2, p0[2], p1[2], p2[2], zPlane); 14477df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.arrayMask |= SPAN_Z; 14580532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#endif 14680532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#ifdef DO_FOG 14780532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul compute_plane(p0, p1, p2, v0->fog, v1->fog, v2->fog, fogPlane); 14877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.arrayMask |= SPAN_FOG; 149e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 150e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_RGBA 151e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell if (ctx->Light.ShadeModel == GL_SMOOTH) { 1528f95d790daee7c012364d689e7d86524340469c1Brian Paul compute_plane(p0, p1, p2, v0->color[RCOMP], v1->color[RCOMP], v2->color[RCOMP], rPlane); 1538f95d790daee7c012364d689e7d86524340469c1Brian Paul compute_plane(p0, p1, p2, v0->color[GCOMP], v1->color[GCOMP], v2->color[GCOMP], gPlane); 1548f95d790daee7c012364d689e7d86524340469c1Brian Paul compute_plane(p0, p1, p2, v0->color[BCOMP], v1->color[BCOMP], v2->color[BCOMP], bPlane); 1558f95d790daee7c012364d689e7d86524340469c1Brian Paul compute_plane(p0, p1, p2, v0->color[ACOMP], v1->color[ACOMP], v2->color[ACOMP], aPlane); 156e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 157e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell else { 15858e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell constant_plane(v2->color[RCOMP], rPlane); 15958e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell constant_plane(v2->color[GCOMP], gPlane); 16058e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell constant_plane(v2->color[BCOMP], bPlane); 16158e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell constant_plane(v2->color[ACOMP], aPlane); 162e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 16377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.arrayMask |= SPAN_RGBA; 164e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 165e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_INDEX 166e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell if (ctx->Light.ShadeModel == GL_SMOOTH) { 1677c4268176eaaeb45003db4d5042a518b84c9f6dcKarl Schultz compute_plane(p0, p1, p2, (GLfloat) v0->index, 1687c4268176eaaeb45003db4d5042a518b84c9f6dcKarl Schultz (GLfloat) v1->index, (GLfloat) v2->index, iPlane); 169e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 170e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell else { 1717c4268176eaaeb45003db4d5042a518b84c9f6dcKarl Schultz constant_plane((GLfloat) v2->index, iPlane); 172e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 17377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.arrayMask |= SPAN_INDEX; 174e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 175e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_SPEC 17658e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell if (ctx->Light.ShadeModel == GL_SMOOTH) { 1778f95d790daee7c012364d689e7d86524340469c1Brian Paul compute_plane(p0, p1, p2, v0->specular[RCOMP], v1->specular[RCOMP], v2->specular[RCOMP], srPlane); 1788f95d790daee7c012364d689e7d86524340469c1Brian Paul compute_plane(p0, p1, p2, v0->specular[GCOMP], v1->specular[GCOMP], v2->specular[GCOMP], sgPlane); 1798f95d790daee7c012364d689e7d86524340469c1Brian Paul compute_plane(p0, p1, p2, v0->specular[BCOMP], v1->specular[BCOMP], v2->specular[BCOMP], sbPlane); 180e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 18158e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell else { 18258e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell constant_plane(v2->specular[RCOMP], srPlane); 18358e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell constant_plane(v2->specular[GCOMP], sgPlane); 18458e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell constant_plane(v2->specular[BCOMP], sbPlane); 18558e991705392a2e17a1c8b034f4083a0adaf1943Keith Whitwell } 18677df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.arrayMask |= SPAN_SPEC; 187e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 188e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_TEX 189e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell { 190cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const struct gl_texture_object *obj = ctx->Texture.Unit[0]._Current; 191e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell const struct gl_texture_image *texImage = obj->Image[obj->BaseLevel]; 192cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat invW0 = v0->win[3]; 193cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat invW1 = v1->win[3]; 194cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat invW2 = v2->win[3]; 195cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat s0 = v0->texcoord[0][0] * invW0; 196cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat s1 = v1->texcoord[0][0] * invW1; 197cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat s2 = v2->texcoord[0][0] * invW2; 198cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat t0 = v0->texcoord[0][1] * invW0; 199cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat t1 = v1->texcoord[0][1] * invW1; 200cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat t2 = v2->texcoord[0][1] * invW2; 201cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat r0 = v0->texcoord[0][2] * invW0; 202cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat r1 = v1->texcoord[0][2] * invW1; 203cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat r2 = v2->texcoord[0][2] * invW2; 204cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat q0 = v0->texcoord[0][3] * invW0; 205cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat q1 = v1->texcoord[0][3] * invW1; 206cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat q2 = v2->texcoord[0][3] * invW2; 207e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell compute_plane(p0, p1, p2, s0, s1, s2, sPlane); 208e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell compute_plane(p0, p1, p2, t0, t1, t2, tPlane); 209e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell compute_plane(p0, p1, p2, r0, r1, r2, uPlane); 210e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell compute_plane(p0, p1, p2, q0, q1, q2, vPlane); 211e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell texWidth = (GLfloat) texImage->Width; 212e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell texHeight = (GLfloat) texImage->Height; 213e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 21477df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA); 215e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#elif defined(DO_MULTITEX) 216e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell { 217e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell GLuint u; 218e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell for (u = 0; u < ctx->Const.MaxTextureUnits; u++) { 219cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell if (ctx->Texture.Unit[u]._ReallyEnabled) { 220cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const struct gl_texture_object *obj = ctx->Texture.Unit[u]._Current; 221e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell const struct gl_texture_image *texImage = obj->Image[obj->BaseLevel]; 222cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat invW0 = v0->win[3]; 223cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat invW1 = v1->win[3]; 224cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat invW2 = v2->win[3]; 225cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat s0 = v0->texcoord[u][0] * invW0; 226cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat s1 = v1->texcoord[u][0] * invW1; 227cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat s2 = v2->texcoord[u][0] * invW2; 228cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat t0 = v0->texcoord[u][1] * invW0; 229cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat t1 = v1->texcoord[u][1] * invW1; 230cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat t2 = v2->texcoord[u][1] * invW2; 231cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat r0 = v0->texcoord[u][2] * invW0; 232cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat r1 = v1->texcoord[u][2] * invW1; 233cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat r2 = v2->texcoord[u][2] * invW2; 234cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat q0 = v0->texcoord[u][3] * invW0; 235cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat q1 = v1->texcoord[u][3] * invW1; 236cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell const GLfloat q2 = v2->texcoord[u][3] * invW2; 237e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell compute_plane(p0, p1, p2, s0, s1, s2, sPlane[u]); 238e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell compute_plane(p0, p1, p2, t0, t1, t2, tPlane[u]); 239e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell compute_plane(p0, p1, p2, r0, r1, r2, uPlane[u]); 240e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell compute_plane(p0, p1, p2, q0, q1, q2, vPlane[u]); 241e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell texWidth[u] = (GLfloat) texImage->Width; 242e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell texHeight[u] = (GLfloat) texImage->Height; 243e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 244e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 245e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 24677df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA); 247e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 248e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 24980532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul /* Begin bottom-to-top scan over the triangle. 25080532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul * The long edge will either be on the left or right side of the 25180532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul * triangle. We always scan from the long edge toward the shorter 25280532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul * edges, stopping when we find that coverage = 0. If the long edge 25380532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul * is on the left we scan left-to-right. Else, we scan right-to-left. 25480532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul */ 255ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul yMin = vMin->win[1]; 256ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul yMax = vMax->win[1]; 257ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul iyMin = (GLint) yMin; 258ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul iyMax = (GLint) yMax + 1; 259ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul 260ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul if (ltor) { 261ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* scan left to right */ 262ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat *pMin = vMin->win; 263ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat *pMid = vMid->win; 264ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat *pMax = vMax->win; 265ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat dxdy = majDx / majDy; 266ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat xAdj = dxdy < 0.0F ? -dxdy : 0.0F; 267ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLfloat x = pMin[0] - (yMin - iyMin) * dxdy; 268470a7b48745d0e467973c9b9d751a8be4abec0e6Brian Paul GLint iy; 269ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul for (iy = iyMin; iy < iyMax; iy++, x += dxdy) { 270ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLint ix, startX = (GLint) (x - xAdj); 271f1e236987829393c81dc86ea19cb49eefe190317Brian Paul GLuint count; 272e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell GLfloat coverage = 0.0F; 27310f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 274ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* skip over fragments with zero coverage */ 275ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul while (startX < MAX_WIDTH) { 276ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul coverage = compute_coveragef(pMin, pMid, pMax, startX, iy); 277ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul if (coverage > 0.0F) 278ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul break; 279ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul startX++; 280f431a3fb4dc1bf860203d79e54657e3a62bc50dfBrian Paul } 281f431a3fb4dc1bf860203d79e54657e3a62bc50dfBrian Paul 282ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* enter interior of triangle */ 283ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul ix = startX; 284ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul count = 0; 285ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul while (coverage > 0.0F) { 286ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* (cx,cy) = center of fragment */ 287ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat cx = ix + 0.5F, cy = iy + 0.5F; 28877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul struct span_arrays *array = span.array; 289ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul#ifdef DO_INDEX 29077df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->coverage[count] = (GLfloat) compute_coveragei(pMin, pMid, pMax, ix, iy); 291ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul#else 29277df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->coverage[count] = coverage; 293f431a3fb4dc1bf860203d79e54657e3a62bc50dfBrian Paul#endif 294e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_Z 29577df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->z[count] = (GLdepth) solve_plane(cx, cy, zPlane); 29680532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#endif 29780532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#ifdef DO_FOG 29877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->fog[count] = solve_plane(cx, cy, fogPlane); 299e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 300e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_RGBA 30177df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->rgba[count][RCOMP] = solve_plane_chan(cx, cy, rPlane); 30277df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->rgba[count][GCOMP] = solve_plane_chan(cx, cy, gPlane); 30377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->rgba[count][BCOMP] = solve_plane_chan(cx, cy, bPlane); 30477df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->rgba[count][ACOMP] = solve_plane_chan(cx, cy, aPlane); 305e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 306e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_INDEX 30777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->index[count] = (GLint) solve_plane(cx, cy, iPlane); 308e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 309e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_SPEC 31077df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->spec[count][RCOMP] = solve_plane_chan(cx, cy, srPlane); 31177df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->spec[count][GCOMP] = solve_plane_chan(cx, cy, sgPlane); 31277df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->spec[count][BCOMP] = solve_plane_chan(cx, cy, sbPlane); 313e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 314e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_TEX 315ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul { 316ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat invQ = solve_plane_recip(cx, cy, vPlane); 31777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[0][count][0] = solve_plane(cx, cy, sPlane) * invQ; 31877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[0][count][1] = solve_plane(cx, cy, tPlane) * invQ; 31977df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[0][count][2] = solve_plane(cx, cy, uPlane) * invQ; 32077df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->lambda[0][count] = compute_lambda(sPlane, tPlane, vPlane, 32131f12f504e61cb2ad65b8890a68eb7154edcb64bBrian Paul cx, cy, invQ, 32210f30eb43835c57c00783390a02d72daf4f78e26Brian Paul texWidth, texHeight); 323ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 324e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#elif defined(DO_MULTITEX) 325ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul { 326ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLuint unit; 327ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { 328ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul if (ctx->Texture.Unit[unit]._ReallyEnabled) { 329ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLfloat invQ = solve_plane_recip(cx, cy, vPlane[unit]); 33077df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[unit][count][0] = solve_plane(cx, cy, sPlane[unit]) * invQ; 33177df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[unit][count][1] = solve_plane(cx, cy, tPlane[unit]) * invQ; 33277df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[unit][count][2] = solve_plane(cx, cy, uPlane[unit]) * invQ; 33377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->lambda[unit][count] = compute_lambda(sPlane[unit], 33431f12f504e61cb2ad65b8890a68eb7154edcb64bBrian Paul tPlane[unit], vPlane[unit], cx, cy, invQ, 33531f12f504e61cb2ad65b8890a68eb7154edcb64bBrian Paul texWidth[unit], texHeight[unit]); 336ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 337ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 338ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 339ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul#endif 340ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul ix++; 341ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul count++; 342ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul coverage = compute_coveragef(pMin, pMid, pMax, ix, iy); 343ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 34410f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 345ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul if (ix <= startX) 346ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul continue; 34710f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 34877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.x = startX; 34977df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.y = iy; 35077df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.end = (GLuint) ix - (GLuint) startX; 35177df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul ASSERT(span.interpMask == 0); 352f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#if defined(DO_MULTITEX) || defined(DO_TEX) 35377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul _mesa_write_texture_span(ctx, &span); 354ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul#elif defined(DO_RGBA) 35577df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul _mesa_write_rgba_span(ctx, &span); 356ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul#elif defined(DO_INDEX) 35777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul _mesa_write_index_span(ctx, &span); 358e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 359ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 360ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 361ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul else { 362ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* scan right to left */ 363ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat *pMin = vMin->win; 364ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat *pMid = vMid->win; 365ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat *pMax = vMax->win; 366ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat dxdy = majDx / majDy; 367ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat xAdj = dxdy > 0 ? dxdy : 0.0F; 368ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLfloat x = pMin[0] - (yMin - iyMin) * dxdy; 369ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLint iy; 370ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul for (iy = iyMin; iy < iyMax; iy++, x += dxdy) { 371ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLint ix, left, startX = (GLint) (x + xAdj); 372ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLuint count, n; 373ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLfloat coverage = 0.0F; 37410f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 375ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* make sure we're not past the window edge */ 376ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul if (startX >= ctx->DrawBuffer->_Xmax) { 377ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul startX = ctx->DrawBuffer->_Xmax - 1; 378ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 379d082417daeb3f8a35a490eb44b6c88463289fa5dBrian Paul 380ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* skip fragments with zero coverage */ 381ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul while (startX >= 0) { 382ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul coverage = compute_coveragef(pMin, pMax, pMid, startX, iy); 383ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul if (coverage > 0.0F) 384ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul break; 385ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul startX--; 386ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 38710f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 388ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* enter interior of triangle */ 389ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul ix = startX; 390ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul count = 0; 391ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul while (coverage > 0.0F) { 392ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul /* (cx,cy) = center of fragment */ 393ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat cx = ix + 0.5F, cy = iy + 0.5F; 39477df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul struct span_arrays *array = span.array; 395ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul#ifdef DO_INDEX 39677df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->coverage[ix] = (GLfloat) compute_coveragei(pMin, pMax, pMid, ix, iy); 397ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul#else 39877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->coverage[ix] = coverage; 399ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul#endif 400e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_Z 40177df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->z[ix] = (GLdepth) solve_plane(cx, cy, zPlane); 40280532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#endif 40380532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#ifdef DO_FOG 40477df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->fog[ix] = solve_plane(cx, cy, fogPlane); 405e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 406e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_RGBA 40777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->rgba[ix][RCOMP] = solve_plane_chan(cx, cy, rPlane); 40877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->rgba[ix][GCOMP] = solve_plane_chan(cx, cy, gPlane); 40977df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->rgba[ix][BCOMP] = solve_plane_chan(cx, cy, bPlane); 41077df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->rgba[ix][ACOMP] = solve_plane_chan(cx, cy, aPlane); 411e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 412e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_INDEX 41377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->index[ix] = (GLint) solve_plane(cx, cy, iPlane); 414e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 415e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_SPEC 41677df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->spec[ix][RCOMP] = solve_plane_chan(cx, cy, srPlane); 41777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->spec[ix][GCOMP] = solve_plane_chan(cx, cy, sgPlane); 41877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->spec[ix][BCOMP] = solve_plane_chan(cx, cy, sbPlane); 419e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 420e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_TEX 421ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul { 422ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul const GLfloat invQ = solve_plane_recip(cx, cy, vPlane); 42377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[0][ix][0] = solve_plane(cx, cy, sPlane) * invQ; 42477df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[0][ix][1] = solve_plane(cx, cy, tPlane) * invQ; 42577df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[0][ix][2] = solve_plane(cx, cy, uPlane) * invQ; 42677df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->lambda[0][ix] = compute_lambda(sPlane, tPlane, vPlane, 42731f12f504e61cb2ad65b8890a68eb7154edcb64bBrian Paul cx, cy, invQ, texWidth, texHeight); 428ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 429e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#elif defined(DO_MULTITEX) 430ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul { 431ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLuint unit; 432ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { 433ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul if (ctx->Texture.Unit[unit]._ReallyEnabled) { 434ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLfloat invQ = solve_plane_recip(cx, cy, vPlane[unit]); 43577df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[unit][ix][0] = solve_plane(cx, cy, sPlane[unit]) * invQ; 43677df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[unit][ix][1] = solve_plane(cx, cy, tPlane[unit]) * invQ; 43777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[unit][ix][2] = solve_plane(cx, cy, uPlane[unit]) * invQ; 43877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->lambda[unit][ix] = compute_lambda(sPlane[unit], 43910f30eb43835c57c00783390a02d72daf4f78e26Brian Paul tPlane[unit], 44031f12f504e61cb2ad65b8890a68eb7154edcb64bBrian Paul vPlane[unit], 44131f12f504e61cb2ad65b8890a68eb7154edcb64bBrian Paul cx, cy, invQ, 44210f30eb43835c57c00783390a02d72daf4f78e26Brian Paul texWidth[unit], 44310f30eb43835c57c00783390a02d72daf4f78e26Brian Paul texHeight[unit]); 444e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 445e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 446ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 447e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 448ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul ix--; 449ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul count++; 450ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul coverage = compute_coveragef(pMin, pMax, pMid, ix, iy); 451e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 45210f30eb43835c57c00783390a02d72daf4f78e26Brian Paul 453ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul if (startX <= ix) 454ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul continue; 455ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul 456ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul n = (GLuint) startX - (GLuint) ix; 457ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul 458ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul left = ix + 1; 459f1e236987829393c81dc86ea19cb49eefe190317Brian Paul 460f1e236987829393c81dc86ea19cb49eefe190317Brian Paul /* shift all values to the left */ 461f1e236987829393c81dc86ea19cb49eefe190317Brian Paul /* XXX this is temporary */ 462f1e236987829393c81dc86ea19cb49eefe190317Brian Paul { 46377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul struct span_arrays *array = span.array; 464f1e236987829393c81dc86ea19cb49eefe190317Brian Paul GLint j; 465f1e236987829393c81dc86ea19cb49eefe190317Brian Paul for (j = 0; j < (GLint) n; j++) { 466f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#ifdef DO_RGBA 46777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul COPY_4V(array->rgba[j], array->rgba[j + left]); 468f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#endif 469f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#ifdef DO_SPEC 47077df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul COPY_4V(array->spec[j], array->spec[j + left]); 471f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#endif 472f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#ifdef DO_INDEX 47377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->index[j] = array->index[j + left]; 474f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#endif 475f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#ifdef DO_Z 47677df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->z[j] = array->z[j + left]; 477f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#endif 478f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#ifdef DO_FOG 47977df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->fog[j] = array->fog[j + left]; 480f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#endif 481f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#ifdef DO_TEX 48277df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul COPY_4V(array->texcoords[0][j], array->texcoords[0][j + left]); 483f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#endif 484f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#if defined(DO_MULTITEX) || defined(DO_TEX) 48577df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->lambda[0][j] = array->lambda[0][j + left]; 486f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#endif 48777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->coverage[j] = array->coverage[j + left]; 488f1e236987829393c81dc86ea19cb49eefe190317Brian Paul } 489f1e236987829393c81dc86ea19cb49eefe190317Brian Paul } 490e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_MULTITEX 491f1e236987829393c81dc86ea19cb49eefe190317Brian Paul /* shift texcoords */ 492ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul { 49377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul struct span_arrays *array = span.array; 494ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLuint unit; 495ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { 496ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul if (ctx->Texture.Unit[unit]._ReallyEnabled) { 497ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul GLint j; 498ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul for (j = 0; j < (GLint) n; j++) { 49977df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[unit][j][0] = array->texcoords[unit][j + left][0]; 50077df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[unit][j][1] = array->texcoords[unit][j + left][1]; 50177df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->texcoords[unit][j][2] = array->texcoords[unit][j + left][2]; 50277df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul array->lambda[unit][j] = array->lambda[unit][j + left]; 503ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 504ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 505ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 506ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 507f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#endif 5082a182a98973edc9ecf2936b1288485bb2b3fa722Brian Paul 50977df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.x = left; 51077df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.y = iy; 51177df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul span.end = n; 51277df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul ASSERT(span.interpMask == 0); 513f1e236987829393c81dc86ea19cb49eefe190317Brian Paul#if defined(DO_MULTITEX) || defined(DO_TEX) 51477df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul _mesa_write_texture_span(ctx, &span); 515e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#elif defined(DO_RGBA) 51677df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul _mesa_write_rgba_span(ctx, &span); 517e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#elif defined(DO_INDEX) 51877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul _mesa_write_index_span(ctx, &span); 519e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 520ee6cf4c6b081dbad7366b80637718d068530d79cBrian Paul } 521e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 522e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell} 523e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 524e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 525e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_Z 526e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#undef DO_Z 527e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 528e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 52980532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#ifdef DO_FOG 53080532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#undef DO_FOG 53180532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul#endif 53280532da3bf2a83448c6f38c34dbaf32898acea2dBrian Paul 533e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_RGBA 534e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#undef DO_RGBA 535e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 536e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 537e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_INDEX 538e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#undef DO_INDEX 539e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 540e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 541e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_SPEC 542e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#undef DO_SPEC 543e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 544e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 545e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_TEX 546e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#undef DO_TEX 547e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 548e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 549e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_MULTITEX 550e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#undef DO_MULTITEX 551e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 552e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 553e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#ifdef DO_OCCLUSION_TEST 554e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#undef DO_OCCLUSION_TEST 555e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#endif 556