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C/C++ Source or Header | 1999-02-04 | 85.2 KB | 1,736 lines

/* $Id: triangle.c,v 3.10 1998/07/09 03:16:24 brianp Exp $ */ /* * Mesa 3-D graphics library * Version: 3.0 * Copyright (C) 1995-1998 Brian Paul * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * $Log: triangle.c,v $ * Revision 3.10 1998/07/09 03:16:24 brianp * added Marten's latest texture triangle code * * Revision 3.9 1998/06/24 02:52:05 brianp * fixed texture coord interp problems. lots of code clean-up * * Revision 3.8 1998/06/18 02:49:35 brianp * added Marten Stromberg's optimized textured triangle code * * Revision 3.7 1998/06/07 22:18:52 brianp * implemented GL_EXT_multitexture extension * * Revision 3.6 1998/05/31 23:50:36 brianp * cleaned up a few Solaris compiler warnings * * Revision 3.5 1998/04/01 02:58:52 brianp * applied Miklos Fazekas's 3-31-98 Macintosh changes * * Revision 3.4 1998/03/27 04:26:44 brianp * fixed G++ warnings * * Revision 3.3 1998/02/20 04:54:02 brianp * implemented GL_SGIS_multitexture * * Revision 3.2 1998/02/04 00:44:29 brianp * fixed casts and conditional expression problems for Amiga StormC compiler * * Revision 3.1 1998/02/02 03:09:34 brianp * added GL_LIGHT_MODEL_COLOR_CONTROL (separate specular color interpolation) * * Revision 3.0 1998/01/31 21:05:24 brianp * initial rev * */ /* * Triangle rasterizers */ #ifdef PC_HEADER #include "all.h" #else #include <assert.h> #include <math.h> #include <stdio.h> #include "context.h" #include "depth.h" #include "feedback.h" #include "macros.h" #include "span.h" #include "texstate.h" #include "triangle.h" #include "types.h" #include "vb.h" #endif /* * Put triangle in feedback buffer. */ static void feedback_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { struct vertex_buffer *VB = ctx->VB; GLfloat color[4]; GLuint i; GLuint texSet = ctx->Texture.CurrentTransformSet; FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN ); FEEDBACK_TOKEN( ctx, (GLfloat) 3 ); /* three vertices */ if (ctx->Light.ShadeModel==GL_FLAT) { /* flat shading - same color for each vertex */ color[0] = (GLfloat) VB->Color[pv][0] / 255.0; color[1] = (GLfloat) VB->Color[pv][1] / 255.0; color[2] = (GLfloat) VB->Color[pv][2] / 255.0; color[3] = (GLfloat) VB->Color[pv][3] / 255.0; } for (i=0;i<3;i++) { GLfloat x, y, z, w; GLfloat tc[4]; GLuint v; GLfloat invq; if (i==0) v = v0; else if (i==1) v = v1; else v = v2; x = VB->Win[v][0]; y = VB->Win[v][1]; z = VB->Win[v][2] / DEPTH_SCALE; w = VB->Clip[v][3]; if (ctx->Light.ShadeModel==GL_SMOOTH) { /* smooth shading - different color for each vertex */ color[0] = (GLfloat) VB->Color[v][0] / 255.0; color[1] = (GLfloat) VB->Color[v][1] / 255.0; color[2] = (GLfloat) VB->Color[v][2] / 255.0; color[3] = (GLfloat) VB->Color[v][3] / 255.0; } if (VB->MultiTexCoord[texSet][v][3]==0.0) invq = 1.0; else invq = 1.0F / VB->MultiTexCoord[texSet][v][3]; tc[0] = VB->MultiTexCoord[texSet][v][0] * invq; tc[1] = VB->MultiTexCoord[texSet][v][1] * invq; tc[2] = VB->MultiTexCoord[texSet][v][2] * invq; tc[3] = VB->MultiTexCoord[texSet][v][3]; gl_feedback_vertex( ctx, x, y, z, w, color, (GLfloat) VB->Index[v], tc ); } } /* * Put triangle in selection buffer. */ static void select_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { struct vertex_buffer *VB = ctx->VB; (void) pv; gl_update_hitflag( ctx, VB->Win[v0][2] / DEPTH_SCALE ); gl_update_hitflag( ctx, VB->Win[v1][2] / DEPTH_SCALE ); gl_update_hitflag( ctx, VB->Win[v2][2] / DEPTH_SCALE ); } /* * Render a flat-shaded color index triangle. */ static void flat_ci_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { #ifdef DBGTRI printf("flat_ci_triangle\n"); #endif #define INTERP_Z 1 #define SETUP_CODE \ GLuint index = VB->Index[pv]; \ if (!VB->MonoColor) { \ /* set the color index */ \ (*ctx->Driver.Index)( ctx, index ); \ } #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ if (n>0) { \ for (i=0;i<n;i++) { \ zspan[i] = FixedToDepth(ffz); \ ffz += fdzdx; \ } \ gl_write_monoindex_span( ctx, n, LEFT, Y, \ zspan, index, GL_POLYGON ); \ } \ } #include "tritemp.h" } /* * Render a smooth-shaded color index triangle. */ static void smooth_ci_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { #ifdef DBGTRI printf("smooth_ci_triangle\n"); #endif (void) pv; #define INTERP_Z 1 #define INTERP_INDEX 1 #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ GLuint index[MAX_WIDTH]; \ if (n>0) { \ for (i=0;i<n;i++) { \ zspan[i] = FixedToDepth(ffz); \ index[i] = FixedToInt(ffi); \ ffz += fdzdx; \ ffi += fdidx; \ } \ gl_write_index_span( ctx, n, LEFT, Y, zspan, \ index, GL_POLYGON ); \ } \ } #include "tritemp.h" } /* * Render a flat-shaded RGBA triangle. */ static void flat_rgba_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { #ifdef DBGTRI printf("flat_rgba_triangle\n"); #endif #define INTERP_Z 1 #define SETUP_CODE \ if (!VB->MonoColor) { \ /* set the color */ \ GLubyte r = VB->Color[pv][0]; \ GLubyte g = VB->Color[pv][1]; \ GLubyte b = VB->Color[pv][2]; \ GLubyte a = VB->Color[pv][3]; \ (*ctx->Driver.Color)( ctx, r, g, b, a ); \ } #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ if (n>0) { \ for (i=0;i<n;i++) { \ zspan[i] = FixedToDepth(ffz); \ ffz += fdzdx; \ } \ gl_write_monocolor_span( ctx, n, LEFT, Y, zspan, \ VB->Color[pv][0], VB->Color[pv][1],\ VB->Color[pv][2], VB->Color[pv][3],\ GL_POLYGON ); \ } \ } #include "tritemp.h" } /* * Render a smooth-shaded RGBA triangle. */ static void smooth_rgba_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { #ifdef DBGTRI printf("smooth_rgba_triangle\n"); #endif (void) pv; #define INTERP_Z 1 #define INTERP_RGB 1 #define INTERP_ALPHA 1 #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ GLubyte rgba[MAX_WIDTH][4]; \ if (n>0) { \ for (i=0;i<n;i++) { \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = FixedToInt(ffr); \ rgba[i][GCOMP] = FixedToInt(ffg); \ rgba[i][BCOMP] = FixedToInt(ffb); \ rgba[i][ACOMP] = FixedToInt(ffa); \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ } \ gl_write_rgba_span( ctx, n, LEFT, Y, zspan, \ rgba, GL_POLYGON ); \ } \ } #include "tritemp.h" } /* * Render an RGB, GL_DECAL, textured triangle. * Interpolate S,T only w/out mipmapping or perspective correction. */ static void simple_textured_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { #ifdef DBGTRI printf("simple_textured_triangle\n"); #endif #define INTERP_INT_ST 1 #define S_SCALE twidth #define T_SCALE theight #define SETUP_CODE \ struct gl_texture_object *obj = ctx->Texture.Set[0].Current2D; \ GLint b = obj->BaseLevel; \ GLfloat twidth = (GLfloat) obj->Image[b]->Width; \ GLfloat theight = (GLfloat) obj->Image[b]->Height; \ GLint twidth_log2 = obj->Image[b]->WidthLog2; \ GLubyte *texture = obj->Image[b]->Data; \ GLint smask = obj->Image[b]->Width - 1; \ GLint tmask = obj->Image[b]->Height - 1; (void) pv; #ifdef USE_X86_ASM # define RGB_TEX *(GLint *)rgba[i] = *(GLint *)(texture + pos) | 0xff000000 #else # define RGB_TEX \ rgba[i][RCOMP] = texture[pos]; \ rgba[i][GCOMP] = texture[pos+1]; \ rgba[i][BCOMP] = texture[pos+2]; \ rgba[i][ACOMP] = 255 #endif #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLubyte rgba[MAX_WIDTH][4]; \ if (n>0) { \ ffs -= FIXED_HALF; /* off-by-one error? */ \ fft -= FIXED_HALF; \ for (i=0;i<n;i++) { \ GLint s = FixedToInt(ffs) & smask; \ GLint t = FixedToInt(fft) & tmask; \ GLint pos = (t << twidth_log2) + s; \ pos = pos + pos + pos; /* multiply by 3 */ \ RGB_TEX; \ ffs += fdsdx; \ fft += fdtdx; \ } \ (*ctx->Driver.WriteRGBASpan)( ctx, n, LEFT, Y, \ (CONST GLubyte(*)[4])rgba, NULL ); \ } \ } #include "tritemp.h" } /* * Render an RGB, GL_DECAL, textured triangle. * Interpolate S,T, GL_LESS depth test, w/out mipmapping or * perspective correction. */ static void simple_z_textured_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { #ifdef DBGTRI printf("simple_z_textured_triangle\n"); #endif #define INTERP_Z 1 #define INTERP_INT_ST 1 #define S_SCALE twidth #define T_SCALE theight #define SETUP_CODE \ struct gl_texture_object *obj = ctx->Texture.Set[0].Current2D; \ GLint b = obj->BaseLevel; \ GLfloat twidth = (GLfloat) obj->Image[b]->Width; \ GLfloat theight = (GLfloat) obj->Image[b]->Height; \ GLint twidth_log2 = obj->Image[b]->WidthLog2; \ GLubyte *texture = obj->Image[b]->Data; \ GLint smask = obj->Image[b]->Width - 1; \ GLint tmask = obj->Image[b]->Height - 1; (void) pv; #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLubyte rgba[MAX_WIDTH][4]; \ GLubyte mask[MAX_WIDTH]; \ if (n>0) { \ ffs -= FIXED_HALF; /* off-by-one error? */ \ fft -= FIXED_HALF; \ for (i=0;i<n;i++) { \ GLdepth z = FixedToDepth(ffz); \ if (z < zRow[i]) { \ GLint s = FixedToInt(ffs) & smask; \ GLint t = FixedToInt(fft) & tmask; \ GLint pos = (t << twidth_log2) + s; \ pos = pos + pos + pos; /* multiply by 3 */\ RGB_TEX; \ zRow[i] = z; \ mask[i] = 1; \ } \ else { \ mask[i] = 0; \ } \ ffz += fdzdx; \ ffs += fdsdx; \ fft += fdtdx; \ } \ (*ctx->Driver.WriteRGBASpan)( ctx, n, LEFT, Y, \ (CONST GLubyte(*)[4])rgba, mask ); \ } \ } #include "tritemp.h" } /* * Render an RGB/RGBA textured triangle without perspective correction. */ static void affine_textured_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { #ifdef DBGTRI printf("affine_textured_triangle\n"); #endif #define INTERP_Z 1 #define INTERP_RGB 1 #define INTERP_ALPHA 1 #define INTERP_INT_ST 1 #define S_SCALE twidth #define T_SCALE theight #define SETUP_CODE \ struct gl_texture_set *set = ctx->Texture.Set+0; \ struct gl_texture_object *obj = set->Current2D; \ GLint b = obj->BaseLevel; \ GLfloat twidth = (GLfloat) obj->Image[b]->Width; \ GLfloat theight = (GLfloat) obj->Image[b]->Height; \ GLint twidth_log2 = obj->Image[b]->WidthLog2; \ GLubyte *texture = obj->Image[b]->Data; \ GLint smask = obj->Image[b]->Width - 1; \ GLint tmask = obj->Image[b]->Height - 1; \ GLint format = obj->Image[b]->Format; \ GLint filter = obj->MinFilter; \ GLint envmode = set->EnvMode; \ GLint comp, tbytesline; \ GLfixed er, eg, eb, ea; \ GLint tr, tg, tb, ta; \ if (envmode == GL_BLEND || envmode == GL_ADD) { \ /* potential off-by-one error here? (1.0f -> 2048 -> 0) */ \ er = FloatToFixed(set->EnvColor[0]); \ eg = FloatToFixed(set->EnvColor[1]); \ eb = FloatToFixed(set->EnvColor[2]); \ ea = FloatToFixed(set->EnvColor[3]); \ } \ switch (format) { \ case GL_ALPHA: \ case GL_LUMINANCE: \ case GL_INTENSITY: \ comp = 1; \ break; \ case GL_LUMINANCE_ALPHA: \ comp = 2; \ break; \ case GL_RGB: \ comp = 3; \ break; \ case GL_RGBA: \ comp = 4; \ break; \ default: \ gl_problem(NULL, "Bad texture format in affine_texture_triangle");\ return; \ } \ tbytesline = obj->Image[b]->Width * comp; (void) pv; /* Instead of defining a function for each mode, a test is done * between the outer and inner loops. This is to reduce code size * and complexity. Observe that an optimizing compiler kills * unused variables (for instance tf,sf,ti,si in case of GL_NEAREST). */ #define NEAREST_RGB \ tr = tex00[0]; \ tg = tex00[1]; \ tb = tex00[2]; \ ta = 0xff #define LINEAR_RGB \ tr = (ti * (si * tex00[0] + sf * tex01[0]) + \ tf * (si * tex10[0] + sf * tex11[0])) >> 2 * FIXED_SHIFT; \ tg = (ti * (si * tex00[1] + sf * tex01[1]) + \ tf * (si * tex10[1] + sf * tex11[1])) >> 2 * FIXED_SHIFT; \ tb = (ti * (si * tex00[2] + sf * tex01[2]) + \ tf * (si * tex10[2] + sf * tex11[2])) >> 2 * FIXED_SHIFT; \ ta = 0xff #define NEAREST_RGBA \ tr = tex00[0]; \ tg = tex00[1]; \ tb = tex00[2]; \ ta = tex00[3] #define LINEAR_RGBA \ tr = (ti * (si * tex00[0] + sf * tex01[0]) + \ tf * (si * tex10[0] + sf * tex11[0])) >> 2 * FIXED_SHIFT; \ tg = (ti * (si * tex00[1] + sf * tex01[1]) + \ tf * (si * tex10[1] + sf * tex11[1])) >> 2 * FIXED_SHIFT; \ tb = (ti * (si * tex00[2] + sf * tex01[2]) + \ tf * (si * tex10[2] + sf * tex11[2])) >> 2 * FIXED_SHIFT; \ ta = (ti * (si * tex00[3] + sf * tex01[3]) + \ tf * (si * tex10[3] + sf * tex11[3])) >> 2 * FIXED_SHIFT #define MODULATE \ dest[0] = ffr * (tr + 1) >> (FIXED_SHIFT + 8); \ dest[1] = ffg * (tg + 1) >> (FIXED_SHIFT + 8); \ dest[2] = ffb * (tb + 1) >> (FIXED_SHIFT + 8); \ dest[3] = ffa * (ta + 1) >> (FIXED_SHIFT + 8) #define DECAL \ dest[0] = ((0xff - ta) * ffr + ((ta + 1) * tr << FIXED_SHIFT)) >> (FIXED_SHIFT + 8); \ dest[1] = ((0xff - ta) * ffg + ((ta + 1) * tg << FIXED_SHIFT)) >> (FIXED_SHIFT + 8); \ dest[2] = ((0xff - ta) * ffb + ((ta + 1) * tb << FIXED_SHIFT)) >> (FIXED_SHIFT + 8); \ dest[3] = FixedToInt(ffa) #define BLEND \ dest[0] = ((0xff - tr) * ffr + (tr + 1) * er) >> (FIXED_SHIFT + 8); \ dest[1] = ((0xff - tg) * ffg + (tg + 1) * eg) >> (FIXED_SHIFT + 8); \ dest[2] = ((0xff - tb) * ffb + (tb + 1) * eb) >> (FIXED_SHIFT + 8); \ dest[3] = ffa * (ta + 1) >> (FIXED_SHIFT + 8) #define REPLACE \ dest[0] = tr; \ dest[1] = tg; \ dest[2] = tb; \ dest[3] = ta #define ADD \ dest[0] = ((ffr << 8) + (tr + 1) * er) >> (FIXED_SHIFT + 8); \ dest[1] = ((ffg << 8) + (tg + 1) * eg) >> (FIXED_SHIFT + 8); \ dest[2] = ((ffb << 8) + (tb + 1) * eb) >> (FIXED_SHIFT + 8); \ dest[3] = ffa * (ta + 1) >> (FIXED_SHIFT + 8) /* shortcuts */ #if defined(USE_X86_ASM) /* assumes (i) unaligned load capacity, and (ii) little endian: */ # define NEAREST_RGB_REPLACE *(GLint *)dest = (*(GLint *)tex00 & 0x00ffffff) \ | ((ffa << (24 - FIXED_SHIFT)) & 0xff000000) #else # define NEAREST_RGB_REPLACE NEAREST_RGB;REPLACE #endif #define NEAREST_RGBA_REPLACE *(GLint *)dest = *(GLint *)tex00 #define SPAN1(DO_TEX,COMP) \ for (i=0;i<n;i++) { \ GLint s = FixedToInt(ffs) & smask; \ GLint t = FixedToInt(fft) & tmask; \ GLint pos = (t << twidth_log2) + s; \ GLubyte *tex00 = texture + COMP * pos; \ zspan[i] = FixedToDepth(ffz); \ DO_TEX; \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ ffs += fdsdx; \ fft += fdtdx; \ dest += 4; \ } #define SPAN2(DO_TEX,COMP) \ for (i=0;i<n;i++) { \ GLint s = FixedToInt(ffs) & smask; \ GLint t = FixedToInt(fft) & tmask; \ GLint sf = ffs & FIXED_FRAC_MASK; \ GLint tf = fft & FIXED_FRAC_MASK; \ GLint si = FIXED_FRAC_MASK - sf; \ GLint ti = FIXED_FRAC_MASK - tf; \ GLint pos = (t << twidth_log2) + s; \ GLubyte *tex00 = texture + COMP * pos; \ GLubyte *tex10 = tex00 + tbytesline; \ GLubyte *tex01 = tex00 + COMP; \ GLubyte *tex11 = tex10 + COMP; \ zspan[i] = FixedToDepth(ffz); \ DO_TEX; \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ ffs += fdsdx; \ fft += fdtdx; \ dest += 4; \ } /* here comes the heavy part.. (something for the compiler to chew on) */ #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ GLubyte rgba[MAX_WIDTH][4]; \ if (n>0) { \ GLubyte *dest = rgba[0]; \ ffs -= FIXED_HALF; /* off-by-one error? */ \ fft -= FIXED_HALF; \ switch (filter) { \ case GL_NEAREST: \ switch (format) { \ case GL_RGB: \ switch (envmode) { \ case GL_MODULATE: \ SPAN1(NEAREST_RGB;MODULATE,3); \ break; \ case GL_DECAL: \ case GL_REPLACE: \ SPAN1(NEAREST_RGB_REPLACE,3); \ break; \ case GL_BLEND: \ SPAN1(NEAREST_RGB;BLEND,3); \ break; \ case GL_ADD: \ SPAN1(NEAREST_RGB;ADD,3); \ break; \ } \ break; \ case GL_RGBA: \ switch(envmode) { \ case GL_MODULATE: \ SPAN1(NEAREST_RGBA;MODULATE,4); \ break; \ case GL_DECAL: \ SPAN1(NEAREST_RGBA;DECAL,4); \ break; \ case GL_BLEND: \ SPAN1(NEAREST_RGBA;BLEND,4); \ break; \ case GL_REPLACE: \ SPAN1(NEAREST_RGBA_REPLACE,4); \ break; \ case GL_ADD: \ SPAN1(NEAREST_RGBA;ADD,4); \ break; \ } \ break; \ } \ break; \ case GL_LINEAR: \ ffs -= FIXED_HALF; \ fft -= FIXED_HALF; \ switch (format) { \ case GL_RGB: \ switch (envmode) { \ case GL_MODULATE: \ SPAN2(LINEAR_RGB;MODULATE,3); \ break; \ case GL_DECAL: \ case GL_REPLACE: \ SPAN2(LINEAR_RGB;REPLACE,3); \ break; \ case GL_BLEND: \ SPAN2(LINEAR_RGB;BLEND,3); \ break; \ case GL_ADD: \ SPAN2(LINEAR_RGB;ADD,3); \ break; \ } \ break; \ case GL_RGBA: \ switch (envmode) { \ case GL_MODULATE: \ SPAN2(LINEAR_RGBA;MODULATE,4); \ break; \ case GL_DECAL: \ SPAN2(LINEAR_RGBA;DECAL,4); \ break; \ case GL_BLEND: \ SPAN2(LINEAR_RGBA;BLEND,4); \ break; \ case GL_REPLACE: \ SPAN2(LINEAR_RGBA;REPLACE,4); \ break; \ case GL_ADD: \ SPAN2(LINEAR_RGBA;ADD,4); \ break; \ } \ break; \ } \ break; \ } \ gl_write_rgba_span(ctx, n, LEFT, Y, (const GLdepth*)zspan, \ rgba, GL_POLYGON); \ /* explicit kill of variables: */ \ ffr = ffg = ffb = ffa = 0; \ } \ } #include "tritemp.h" #undef SPAN1 #undef SPAN2 } /* * Render an perspective corrected RGB/RGBA textured triangle. * The Q (aka V in Mesa) coordinate must be zero such that the divide * by interpolated Q/W comes out right. */ static void persp_textured_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { #ifdef DBGTRI printf("persp_textured_triangle\n"); #endif #define INTERP_Z 1 #define INTERP_RGB 1 #define INTERP_ALPHA 1 #define INTERP_STUV 1 #define SETUP_CODE \ struct gl_texture_set *set = ctx->Texture.Set+0; \ struct gl_texture_object *obj = set->Current2D; \ GLint b = obj->BaseLevel; \ GLfloat twidth = (GLfloat) obj->Image[b]->Width; \ GLfloat theight = (GLfloat) obj->Image[b]->Height; \ GLint twidth_log2 = obj->Image[b]->WidthLog2; \ GLubyte *texture = obj->Image[b]->Data; \ GLint smask = (obj->Image[b]->Width - 1); \ GLint tmask = (obj->Image[b]->Height - 1); \ GLint format = obj->Image[b]->Format; \ GLint filter = obj->MinFilter; \ GLint envmode = set->EnvMode; \ GLfloat sscale, tscale; \ GLint comp, tbytesline; \ GLfixed er, eg, eb, ea; \ GLint tr, tg, tb, ta; \ if (envmode == GL_BLEND || envmode == GL_ADD) { \ er = FloatToFixed(set->EnvColor[0]); \ eg = FloatToFixed(set->EnvColor[1]); \ eb = FloatToFixed(set->EnvColor[2]); \ ea = FloatToFixed(set->EnvColor[3]); \ } \ switch (format) { \ case GL_ALPHA: \ case GL_LUMINANCE: \ case GL_INTENSITY: \ comp = 1; \ break; \ case GL_LUMINANCE_ALPHA: \ comp = 2; \ break; \ case GL_RGB: \ comp = 3; \ break; \ case GL_RGBA: \ comp = 4; \ break; \ default: \ gl_problem(NULL, "Bad texture format in persp_texture_triangle"); \ return; \ } \ if (filter == GL_NEAREST) { \ sscale = twidth; \ tscale = theight; \ } \ else { \ sscale = FIXED_SCALE * twidth; \ tscale = FIXED_SCALE * theight; \ } \ tbytesline = obj->Image[b]->Width * comp; (void) pv; #define SPAN1(DO_TEX,COMP) \ for (i=0;i<n;i++) { \ GLfloat invQ = 1.0f / vv; \ GLint s = (int)(SS * invQ) & smask; \ GLint t = (int)(TT * invQ) & tmask; \ GLint pos = COMP * ((t << twidth_log2) + s); \ GLubyte *tex00 = texture + pos; \ zspan[i] = FixedToDepth(ffz); \ DO_TEX; \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ SS += dSdx; \ TT += dTdx; \ vv += dvdx; \ dest += 4; \ } #define SPAN2(DO_TEX,COMP) \ for (i=0;i<n;i++) { \ GLfloat invQ = 1.0f / vv; \ GLfixed ffs = (int)(SS * invQ); \ GLfixed fft = (int)(TT * invQ); \ GLint s = FixedToInt(ffs) & smask; \ GLint t = FixedToInt(fft) & tmask; \ GLint sf = ffs & FIXED_FRAC_MASK; \ GLint tf = fft & FIXED_FRAC_MASK; \ GLint si = FIXED_FRAC_MASK - sf; \ GLint ti = FIXED_FRAC_MASK - tf; \ GLint pos = COMP * ((t << twidth_log2) + s); \ GLubyte *tex00 = texture + pos; \ GLubyte *tex10 = tex00 + tbytesline; \ GLubyte *tex01 = tex00 + COMP; \ GLubyte *tex11 = tex10 + COMP; \ zspan[i] = FixedToDepth(ffz); \ DO_TEX; \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ SS += dSdx; \ TT += dTdx; \ vv += dvdx; \ dest += 4; \ } #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ GLubyte rgba[MAX_WIDTH][4]; \ (void)uu; /* please GCC */ \ if (n>0) { \ GLfloat SS = ss * sscale; \ GLfloat TT = tt * tscale; \ GLfloat dSdx = dsdx * sscale; \ GLfloat dTdx = dtdx * tscale; \ GLubyte *dest = rgba[0]; \ switch (filter) { \ case GL_NEAREST: \ switch (format) { \ case GL_RGB: \ switch (envmode) { \ case GL_MODULATE: \ SPAN1(NEAREST_RGB;MODULATE,3); \ break; \ case GL_DECAL: \ case GL_REPLACE: \ SPAN1(NEAREST_RGB_REPLACE,3); \ break; \ case GL_BLEND: \ SPAN1(NEAREST_RGB;BLEND,3); \ break; \ case GL_ADD: \ SPAN1(NEAREST_RGB;ADD,3); \ break; \ } \ break; \ case GL_RGBA: \ switch(envmode) { \ case GL_MODULATE: \ SPAN1(NEAREST_RGBA;MODULATE,4); \ break; \ case GL_DECAL: \ SPAN1(NEAREST_RGBA;DECAL,4); \ break; \ case GL_BLEND: \ SPAN1(NEAREST_RGBA;BLEND,4); \ break; \ case GL_REPLACE: \ SPAN1(NEAREST_RGBA_REPLACE,4); \ break; \ case GL_ADD: \ SPAN1(NEAREST_RGBA;ADD,4); \ break; \ } \ break; \ } \ break; \ case GL_LINEAR: \ SS -= 0.5f * FIXED_SCALE * vv; \ TT -= 0.5f * FIXED_SCALE * vv; \ switch (format) { \ case GL_RGB: \ switch (envmode) { \ case GL_MODULATE: \ SPAN2(LINEAR_RGB;MODULATE,3); \ break; \ case GL_DECAL: \ case GL_REPLACE: \ SPAN2(LINEAR_RGB;REPLACE,3); \ break; \ case GL_BLEND: \ SPAN2(LINEAR_RGB;BLEND,3); \ break; \ case GL_ADD: \ SPAN2(LINEAR_RGB;ADD,3); \ break; \ } \ break; \ case GL_RGBA: \ switch (envmode) { \ case GL_MODULATE: \ SPAN2(LINEAR_RGBA;MODULATE,4); \ break; \ case GL_DECAL: \ SPAN2(LINEAR_RGBA;DECAL,4); \ break; \ case GL_BLEND: \ SPAN2(LINEAR_RGBA;BLEND,4); \ break; \ case GL_REPLACE: \ SPAN2(LINEAR_RGBA;REPLACE,4); \ break; \ case GL_ADD: \ SPAN2(LINEAR_RGBA;ADD,4); \ break; \ } \ break; \ } \ break; \ } \ gl_write_rgba_span( ctx, n, LEFT, Y, (const GLdepth*)zspan, \ rgba, GL_POLYGON ); \ ffr = ffg = ffb = ffa = 0; \ } \ } #include "tritemp.h" #undef SPAN1 #undef SPAN2 } #include <stdio.h> /* * Render a smooth-shaded, textured, RGBA triangle. * Interpolate S,T,U with perspective correction, w/out mipmapping. * Note: we use texture coordinates S,T,U,V instead of S,T,R,Q because * R is already used for red. */ static void general_textured_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { #ifdef DBGTRI printf("general_textured_triangle\n"); #endif #define INTERP_Z 1 #define INTERP_RGB 1 #define INTERP_ALPHA 1 #define INTERP_STUV 1 #define SETUP_CODE \ GLboolean flat_shade = (ctx->Light.ShadeModel==GL_FLAT); \ GLint r, g, b, a; \ if (flat_shade) { \ r = VB->Color[pv][0]; \ g = VB->Color[pv][1]; \ b = VB->Color[pv][2]; \ a = VB->Color[pv][3]; \ } #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ GLubyte rgba[MAX_WIDTH][4]; \ GLfloat s[MAX_WIDTH], t[MAX_WIDTH], u[MAX_WIDTH]; \ if (n>0) { \ if (flat_shade) { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = r; \ rgba[i][GCOMP] = g; \ rgba[i][BCOMP] = b; \ rgba[i][ACOMP] = a; \ s[i] = ss*invQ; \ t[i] = tt*invQ; \ u[i] = uu*invQ; \ ffz += fdzdx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ } \ } \ else { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = FixedToInt(ffr); \ rgba[i][GCOMP] = FixedToInt(ffg); \ rgba[i][BCOMP] = FixedToInt(ffb); \ rgba[i][ACOMP] = FixedToInt(ffa); \ s[i] = ss*invQ; \ t[i] = tt*invQ; \ u[i] = uu*invQ; \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ } \ } \ gl_write_texture_span( ctx, n, LEFT, Y, (const GLdepth*)zspan, \ (const GLfloat*)s, (const GLfloat*)t, (const GLfloat*)u, NULL, \ rgba, NULL, GL_POLYGON ); \ } \ } #include "tritemp.h" } /* * Render a smooth-shaded, textured, RGBA triangle with separate specular * color interpolation. * Interpolate S,T,U with perspective correction, w/out mipmapping. * Note: we use texture coordinates S,T,U,V instead of S,T,R,Q because * R is already used for red. */ static void general_textured_spec_triangle1( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv, GLdepth zspan[MAX_WIDTH], GLubyte rgba[MAX_WIDTH][4], GLubyte spec[MAX_WIDTH][4] ) { #ifdef DBGTRI printf("general_textured_spec_triangle1\n"); #endif #define INTERP_Z 1 #define INTERP_RGB 1 #define INTERP_SPEC 1 #define INTERP_ALPHA 1 #define INTERP_STUV 1 #define SETUP_CODE \ GLboolean flat_shade = (ctx->Light.ShadeModel==GL_FLAT); \ GLint r, g, b, a, sr, sg, sb; \ if (flat_shade) { \ r = VB->Color[pv][0]; \ g = VB->Color[pv][1]; \ b = VB->Color[pv][2]; \ a = VB->Color[pv][3]; \ sr = VB->Specular[pv][0]; \ sg = VB->Specular[pv][1]; \ sb = VB->Specular[pv][2]; \ } #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLfloat s[MAX_WIDTH], t[MAX_WIDTH], u[MAX_WIDTH]; \ if (n>0) { \ if (flat_shade) { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = r; \ rgba[i][GCOMP] = g; \ rgba[i][BCOMP] = b; \ rgba[i][ACOMP] = a; \ spec[i][RCOMP] = sr; \ spec[i][GCOMP] = sg; \ spec[i][BCOMP] = sb; \ s[i] = ss*invQ; \ t[i] = tt*invQ; \ u[i] = uu*invQ; \ ffz += fdzdx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ } \ } \ else { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = FixedToInt(ffr); \ rgba[i][GCOMP] = FixedToInt(ffg); \ rgba[i][BCOMP] = FixedToInt(ffb); \ rgba[i][ACOMP] = FixedToInt(ffa); \ spec[i][RCOMP] = FixedToInt(ffsr); \ spec[i][GCOMP] = FixedToInt(ffsg); \ spec[i][BCOMP] = FixedToInt(ffsb); \ s[i] = ss*invQ; \ t[i] = tt*invQ; \ u[i] = uu*invQ; \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ ffsr += fdsrdx; \ ffsg += fdsgdx; \ ffsb += fdsbdx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ } \ } \ gl_write_texture_span( ctx, n, LEFT, Y, (const GLdepth*)zspan, \ (const GLfloat*)s, (const GLfloat*)t, (const GLfloat*)u, NULL, \ rgba, (CONST GLubyte(*)[4])spec, GL_POLYGON ); \ } \ } #include "tritemp.h" } /* * Compute the lambda value (texture level value) for a fragment. */ static GLfloat compute_lambda( GLfloat s, GLfloat dsdx, GLfloat dsdy, GLfloat t, GLfloat dtdx, GLfloat dtdy, GLfloat invQ, GLfloat dqdx, GLfloat dqdy, GLfloat width, GLfloat height ) { GLfloat dudx, dudy, dvdx, dvdy; GLfloat r1, r2, rho2; GLfloat invQ_width = invQ * width; GLfloat invQ_height = invQ * height; dudx = (dsdx - s*dqdx) * invQ_width; dudy = (dsdy - s*dqdy) * invQ_width; dvdx = (dtdx - t*dqdx) * invQ_height; dvdy = (dtdy - t*dqdy) * invQ_height; r1 = dudx * dudx + dudy * dudy; r2 = dvdx * dvdx + dvdy * dvdy; rho2 = r1 + r2; /* used to be: rho2 = MAX2(r1,r2); */ ASSERT( rho2 >= 0.0 ); /* return log base 2 of rho */ return log(rho2) * 1.442695 * 0.5; /* 1.442695 = 1/log(2) */ } /* * Render a smooth-shaded, textured, RGBA triangle. * Interpolate S,T,U with perspective correction and compute lambda for * each fragment. Lambda is used to determine whether to use the * minification or magnification filter. If minification and using * mipmaps, lambda is also used to select the texture level of detail. */ static void lambda_textured_triangle1( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv, GLfloat s[MAX_WIDTH], GLfloat t[MAX_WIDTH], GLfloat u[MAX_WIDTH] ) { #ifdef DBGTRI printf("lambda_textured_triangle1\n"); #endif #define INTERP_Z 1 #define INTERP_RGB 1 #define INTERP_ALPHA 1 #define INTERP_STUV 1 #define SETUP_CODE \ GLboolean flat_shade = (ctx->Light.ShadeModel==GL_FLAT); \ GLint r, g, b, a; \ GLfloat twidth, theight; \ if (ctx->Texture.Enabled & TEXTURE0_3D) { \ twidth = (GLfloat) ctx->Texture.Set[0].Current3D->Image[0]->Width; \ theight = (GLfloat) ctx->Texture.Set[0].Current3D->Image[0]->Height; \ } \ else if (ctx->Texture.Enabled & TEXTURE0_2D) { \ twidth = (GLfloat) ctx->Texture.Set[0].Current2D->Image[0]->Width; \ theight = (GLfloat) ctx->Texture.Set[0].Current2D->Image[0]->Height; \ } \ else { \ twidth = (GLfloat) ctx->Texture.Set[0].Current1D->Image[0]->Width; \ theight = 1.0; \ } \ if (flat_shade) { \ r = VB->Color[pv][0]; \ g = VB->Color[pv][1]; \ b = VB->Color[pv][2]; \ a = VB->Color[pv][3]; \ } #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ GLubyte rgba[MAX_WIDTH][4]; \ GLfloat lambda[MAX_WIDTH]; \ if (n>0) { \ if (flat_shade) { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = r; \ rgba[i][GCOMP] = g; \ rgba[i][BCOMP] = b; \ rgba[i][ACOMP] = a; \ s[i] = ss*invQ; \ t[i] = tt*invQ; \ u[i] = uu*invQ; \ lambda[i] = compute_lambda( s[i], dsdx, dsdy, \ t[i], dtdx, dtdy, \ invQ, dvdx, dvdy, \ twidth, theight ); \ ffz += fdzdx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ } \ } \ else { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = FixedToInt(ffr); \ rgba[i][GCOMP] = FixedToInt(ffg); \ rgba[i][BCOMP] = FixedToInt(ffb); \ rgba[i][ACOMP] = FixedToInt(ffa); \ s[i] = ss*invQ; \ t[i] = tt*invQ; \ u[i] = uu*invQ; \ lambda[i] = compute_lambda( s[i], dsdx, dsdy, \ t[i], dtdx, dtdy, \ invQ, dvdx, dvdy, \ twidth, theight ); \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ } \ } \ gl_write_texture_span( ctx, n, LEFT, Y, (const GLdepth*)zspan, \ (const GLfloat*)s, (const GLfloat*)t, (const GLfloat*)u, lambda, \ rgba, NULL, GL_POLYGON ); \ } \ } #include "tritemp.h" } /* * Render a smooth-shaded, textured, RGBA triangle with separate specular * interpolation. * Interpolate S,T,U with perspective correction and compute lambda for * each fragment. Lambda is used to determine whether to use the * minification or magnification filter. If minification and using * mipmaps, lambda is also used to select the texture level of detail. */ static void lambda_textured_spec_triangle1( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv, GLfloat s[MAX_WIDTH], GLfloat t[MAX_WIDTH], GLfloat u[MAX_WIDTH] ) { #ifdef DBGTRI printf("lambda_textured_spec_triangle1\n"); #endif #define INTERP_Z 1 #define INTERP_RGB 1 #define INTERP_SPEC 1 #define INTERP_ALPHA 1 #define INTERP_STUV 1 #define SETUP_CODE \ GLboolean flat_shade = (ctx->Light.ShadeModel==GL_FLAT); \ GLint r, g, b, a, sr, sg, sb; \ GLfloat twidth, theight; \ if (ctx->Texture.Enabled & TEXTURE0_3D) { \ twidth = (GLfloat) ctx->Texture.Set[0].Current3D->Image[0]->Width; \ theight = (GLfloat) ctx->Texture.Set[0].Current3D->Image[0]->Height; \ } \ else if (ctx->Texture.Enabled & TEXTURE0_2D) { \ twidth = (GLfloat) ctx->Texture.Set[0].Current2D->Image[0]->Width; \ theight = (GLfloat) ctx->Texture.Set[0].Current2D->Image[0]->Height; \ } \ else { \ twidth = (GLfloat) ctx->Texture.Set[0].Current1D->Image[0]->Width; \ theight = 1.0; \ } \ if (flat_shade) { \ r = VB->Color[pv][0]; \ g = VB->Color[pv][1]; \ b = VB->Color[pv][2]; \ a = VB->Color[pv][3]; \ sr = VB->Specular[pv][0]; \ sg = VB->Specular[pv][1]; \ sb = VB->Specular[pv][2]; \ } #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ GLubyte spec[MAX_WIDTH][4]; \ GLubyte rgba[MAX_WIDTH][4]; \ GLfloat lambda[MAX_WIDTH]; \ if (n>0) { \ if (flat_shade) { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = r; \ rgba[i][GCOMP] = g; \ rgba[i][BCOMP] = b; \ rgba[i][ACOMP] = a; \ spec[i][RCOMP] = sr; \ spec[i][GCOMP] = sg; \ spec[i][BCOMP] = sb; \ s[i] = ss*invQ; \ t[i] = tt*invQ; \ u[i] = uu*invQ; \ lambda[i] = compute_lambda( s[i], dsdx, dsdy, \ t[i], dtdx, dtdy, \ invQ, dvdx, dvdy, \ twidth, theight ); \ ffz += fdzdx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ } \ } \ else { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = FixedToInt(ffr); \ rgba[i][GCOMP] = FixedToInt(ffg); \ rgba[i][BCOMP] = FixedToInt(ffb); \ rgba[i][ACOMP] = FixedToInt(ffa); \ spec[i][RCOMP] = FixedToInt(ffsr); \ spec[i][GCOMP] = FixedToInt(ffsg); \ spec[i][BCOMP] = FixedToInt(ffsb); \ s[i] = ss*invQ; \ t[i] = tt*invQ; \ u[i] = uu*invQ; \ lambda[i] = compute_lambda( s[i], dsdx, dsdy, \ t[i], dtdx, dtdy, \ invQ, dvdx, dvdy, \ twidth, theight ); \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ ffsr += fdsrdx; \ ffsg += fdsgdx; \ ffsb += fdsbdx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ } \ } \ gl_write_texture_span( ctx, n, LEFT, Y, (const GLdepth*)zspan, \ (const GLfloat*)s, (const GLfloat*)t, (const GLfloat*)u, lambda, \ rgba, (CONST GLubyte(*)[4])spec, GL_POLYGON ); \ } \ } #include "tritemp.h" } /* * This is the big one! * Interpolate Z, RGB, Alpha, and two sets of texture coordinates. * Yup, it's slow. */ static void lambda_multitextured_triangle1( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv, GLubyte rgba[MAX_WIDTH][4], GLfloat s[MAX_TEX_COORD_SETS][MAX_WIDTH], GLfloat t[MAX_TEX_COORD_SETS][MAX_WIDTH] ) { #ifdef DBGTRI printf("lambda_multitextured_triangle1\n"); #endif #define INTERP_Z 1 #define INTERP_RGB 1 #define INTERP_ALPHA 1 #define INTERP_STUV 1 #define INTERP_STUV1 1 #define SETUP_CODE \ GLboolean flat_shade = (ctx->Light.ShadeModel==GL_FLAT); \ GLint r, g, b, a; \ GLfloat twidth0, theight0; \ GLfloat twidth1, theight1; \ if (ctx->Texture.Enabled & TEXTURE0_3D) { \ twidth0 = (GLfloat) ctx->Texture.Set[0].Current3D->Image[0]->Width; \ theight0 = (GLfloat) ctx->Texture.Set[0].Current3D->Image[0]->Height; \ } \ else if (ctx->Texture.Enabled & TEXTURE0_2D) { \ twidth0 = (GLfloat) ctx->Texture.Set[0].Current2D->Image[0]->Width; \ theight0 = (GLfloat) ctx->Texture.Set[0].Current2D->Image[0]->Height; \ } \ else if (ctx->Texture.Enabled & TEXTURE0_1D) { \ twidth0 = (GLfloat) ctx->Texture.Set[0].Current1D->Image[0]->Width; \ theight0 = 1.0; \ } \ if (ctx->Texture.Enabled & TEXTURE1_3D) { \ twidth1 = (GLfloat) ctx->Texture.Set[1].Current3D->Image[0]->Width; \ theight1 = (GLfloat) ctx->Texture.Set[1].Current3D->Image[0]->Height; \ } \ else if (ctx->Texture.Enabled & TEXTURE1_2D) { \ twidth1 = (GLfloat) ctx->Texture.Set[1].Current2D->Image[0]->Width; \ theight1 = (GLfloat) ctx->Texture.Set[1].Current2D->Image[0]->Height; \ } \ else if (ctx->Texture.Enabled & TEXTURE1_1D) { \ twidth1 = (GLfloat) ctx->Texture.Set[1].Current1D->Image[0]->Width; \ theight1 = 1.0; \ } \ if (flat_shade) { \ r = VB->Color[pv][0]; \ g = VB->Color[pv][1]; \ b = VB->Color[pv][2]; \ a = VB->Color[pv][3]; \ } #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, n = RIGHT-LEFT; \ GLdepth zspan[MAX_WIDTH]; \ GLfloat u[MAX_TEX_COORD_SETS][MAX_WIDTH]; \ GLfloat lambda[MAX_TEX_COORD_SETS][MAX_WIDTH]; \ if (n>0) { \ if (flat_shade) { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ GLdouble invQ1 = 1.0 / vv1; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = r; \ rgba[i][GCOMP] = g; \ rgba[i][BCOMP] = b; \ rgba[i][ACOMP] = a; \ s[0][i] = ss*invQ; \ t[0][i] = tt*invQ; \ u[0][i] = uu*invQ; \ lambda[0][i] = compute_lambda( s[0][i], dsdx, dsdy, \ t[0][i], dtdx, dtdy, \ invQ, dvdx, dvdy, \ twidth0, theight0 ); \ s[1][i] = ss1*invQ1; \ t[1][i] = tt1*invQ1; \ u[1][i] = uu1*invQ1; \ lambda[1][i] = compute_lambda( s[1][i], ds1dx, ds1dy, \ t[1][i], dt1dx, dt1dy, \ invQ, dvdx, dvdy, \ twidth1, theight1 ); \ ffz += fdzdx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ ss1 += ds1dx; \ tt1 += dt1dx; \ uu1 += du1dx; \ vv1 += dv1dx; \ } \ } \ else { \ for (i=0;i<n;i++) { \ GLdouble invQ = 1.0 / vv; \ GLdouble invQ1 = 1.0 / vv1; \ zspan[i] = FixedToDepth(ffz); \ rgba[i][RCOMP] = FixedToInt(ffr); \ rgba[i][GCOMP] = FixedToInt(ffg); \ rgba[i][BCOMP] = FixedToInt(ffb); \ rgba[i][ACOMP] = FixedToInt(ffa); \ s[0][i] = ss*invQ; \ t[0][i] = tt*invQ; \ u[0][i] = uu*invQ; \ lambda[0][i] = compute_lambda( s[0][i], dsdx, dsdy, \ t[0][i], dtdx, dtdy, \ invQ, dvdx, dvdy, \ twidth0, theight0 ); \ s[1][i] = ss1*invQ1; \ t[1][i] = tt1*invQ1; \ u[1][i] = uu1*invQ1; \ lambda[1][i] = compute_lambda( s[1][i], ds1dx, ds1dy, \ t[1][i], dt1dx, dt1dy, \ invQ1, dvdx, dvdy, \ twidth1, theight1 ); \ ffz += fdzdx; \ ffr += fdrdx; \ ffg += fdgdx; \ ffb += fdbdx; \ ffa += fdadx; \ ss += dsdx; \ tt += dtdx; \ uu += dudx; \ vv += dvdx; \ ss1 += ds1dx; \ tt1 += dt1dx; \ uu1 += du1dx; \ vv1 += dv1dx; \ } \ } \ gl_write_multitexture_span( ctx, 2, n, LEFT, Y, (const GLdepth*)zspan, \ (CONST GLfloat(*)[MAX_WIDTH])s, (CONST GLfloat(*)[MAX_WIDTH])t, (CONST GLfloat(*)[MAX_WIDTH])u, lambda, \ rgba, NULL, GL_POLYGON ); \ } \ } #include "tritemp.h" } /* * These wrappers are needed to deal with the 32KB / stack frame limit * on Mac / PowerPC systems. */ static void general_textured_spec_triangle(GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv) { GLdepth zspan[MAX_WIDTH]; GLubyte rgba[MAX_WIDTH][4], spec[MAX_WIDTH][4]; general_textured_spec_triangle1(ctx,v0,v1,v2,pv,zspan,rgba,spec); } static void lambda_textured_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { GLfloat s[MAX_WIDTH], t[MAX_WIDTH], u[MAX_WIDTH]; lambda_textured_triangle1(ctx,v0,v1,v2,pv,s,t,u); } static void lambda_textured_spec_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { GLfloat s[MAX_WIDTH]; GLfloat t[MAX_WIDTH]; GLfloat u[MAX_WIDTH]; lambda_textured_spec_triangle1(ctx,v0,v1,v2,pv,s,t,u); } static void lambda_multitextured_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv) { GLubyte rgba[MAX_WIDTH][4]; GLfloat s[MAX_TEX_COORD_SETS][MAX_WIDTH]; GLfloat t[MAX_TEX_COORD_SETS][MAX_WIDTH]; lambda_multitextured_triangle1(ctx,v0,v1,v2,pv,rgba,s,t); } /* * Null rasterizer for measuring transformation speed. */ static void null_triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv ) { (void) ctx; (void) v0; (void) v1; (void) v2; (void) pv; } #if 0 # define dputs(s) puts(s) #else # define dputs(s) #endif /* * Determine which triangle rendering function to use given the current * rendering context. */ void gl_set_triangle_function( GLcontext *ctx ) { GLboolean rgbmode = ctx->Visual->RGBAflag; if (ctx->RenderMode==GL_RENDER) { if (ctx->NoRaster) { ctx->Driver.TriangleFunc = null_triangle; return; } if (ctx->Driver.TriangleFunc) { /* Device driver will draw triangles. */ } else if (ctx->Texture.Enabled) { /* Ugh, we do a _lot_ of tests to pick the best textured tri func */ int format, filter; const struct gl_texture_object *current2Dtex = ctx->Texture.Set[0].Current2D; const struct gl_texture_image *image; /* First see if we can used an optimized 2-D texture function */ if (ctx->Texture.Enabled==TEXTURE0_2D && ctx->Texture.Set[0].Current && ctx->Texture.Set[0].Current->Complete && current2Dtex->WrapS==GL_REPEAT && current2Dtex->WrapT==GL_REPEAT && (image = current2Dtex->Image[current2Dtex->BaseLevel]) /* correct? */ && image->Border==0 && ((format = image->Format)==GL_RGB || format==GL_RGBA) /* && ctx->TextureMatrixType[0]==MATRIX_IDENTITY -- OK? */ && (filter = current2Dtex->MinFilter)==current2Dtex->MagFilter && ctx->Light.Model.ColorControl==GL_SINGLE_COLOR) { if (ctx->Hint.PerspectiveCorrection==GL_FASTEST) { if (filter==GL_NEAREST && format==GL_RGB && (ctx->Texture.Set[0].EnvMode==GL_REPLACE || ctx->Texture.Set[0].EnvMode==GL_DECAL) && ((ctx->RasterMask==DEPTH_BIT && ctx->Depth.Func==GL_LESS && ctx->Depth.Mask==GL_TRUE) || ctx->RasterMask==0) && ctx->Polygon.StippleFlag==GL_FALSE) { if (ctx->RasterMask==DEPTH_BIT) { ctx->Driver.TriangleFunc = simple_z_textured_triangle; dputs("simple_z_textured_triangle"); } else { ctx->Driver.TriangleFunc = simple_textured_triangle; dputs("simple_textured_triangle"); } } else { ctx->Driver.TriangleFunc = affine_textured_triangle; dputs("affine_textured_triangle"); } } else { ctx->Driver.TriangleFunc = persp_textured_triangle; dputs("persp_textured_triangle"); } } else { /* More complicated textures (mipmap, multi-tex, sep specular) */ GLboolean needLambda = GL_FALSE; /* if mag filter != min filter we need to compute lambda */ GLuint i; for (i=0;i<MAX_TEX_SETS;i++) { GLuint mask = (TEXTURE0_1D|TEXTURE0_2D|TEXTURE0_3D) << (i*4); if (ctx->Texture.Enabled & mask) { if (ctx->Texture.Set[i].Current->MinFilter != ctx->Texture.Set[i].Current->MagFilter) { needLambda = GL_TRUE; } } } if (ctx->Texture.Enabled >= TEXTURE1_1D) { /* multi-texture! */ ctx->Driver.TriangleFunc = lambda_multitextured_triangle; dputs("lambda_multitextured_triangle"); } else if (ctx->Light.Model.ColorControl==GL_SINGLE_COLOR) { if (needLambda) { ctx->Driver.TriangleFunc = lambda_textured_triangle; dputs("lambda_textured_triangle"); } else { ctx->Driver.TriangleFunc = general_textured_triangle; dputs("general_textured_triangle"); } } else { /* seprate specular color interpolation */ if (needLambda) { ctx->Driver.TriangleFunc = lambda_textured_spec_triangle; dputs("lambda_textured_spec_triangle"); } else { ctx->Driver.TriangleFunc = general_textured_spec_triangle; dputs("general_textured_spec_triangle"); } } } } else { if (ctx->Light.ShadeModel==GL_SMOOTH) { /* smooth shaded, no texturing, stippled or some raster ops */ if (rgbmode) ctx->Driver.TriangleFunc = smooth_rgba_triangle; else ctx->Driver.TriangleFunc = smooth_ci_triangle; } else { /* flat shaded, no texturing, stippled or some raster ops */ if (rgbmode) ctx->Driver.TriangleFunc = flat_rgba_triangle; else ctx->Driver.TriangleFunc = flat_ci_triangle; } } } else if (ctx->RenderMode==GL_FEEDBACK) { ctx->Driver.TriangleFunc = feedback_triangle; } else { /* GL_SELECT mode */ ctx->Driver.TriangleFunc = select_triangle; } }