s_lines.c revision 298be2b028263b2c343a707662c6fbfa18293cb2
1e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell/* 2e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * Mesa 3-D graphics library 3efda5cb6263631175aa2efe46df9322b3c5775eeBrian * Version: 7.1 422144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * 59ede048127ea71282fd97e01516dedcfb03e2a23Brian * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. 622144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * 7e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * Permission is hereby granted, free of charge, to any person obtaining a 8e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * copy of this software and associated documentation files (the "Software"), 9e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * to deal in the Software without restriction, including without limitation 10e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * and/or sell copies of the Software, and to permit persons to whom the 12e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * Software is furnished to do so, subject to the following conditions: 1322144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * 14e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * The above copyright notice and this permission notice shall be included 15e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * in all copies or substantial portions of the Software. 1622144ab7552f0799bcfca506bf4ffa7f70a06649Gareth Hughes * 17e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell */ 24e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 25e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 26bbd287103dad776d8a45c87c4e51fbc26d9b80d5Brian Paul#include "main/glheader.h" 27bbd287103dad776d8a45c87c4e51fbc26d9b80d5Brian Paul#include "main/context.h" 28bbd287103dad776d8a45c87c4e51fbc26d9b80d5Brian Paul#include "main/colormac.h" 29bbd287103dad776d8a45c87c4e51fbc26d9b80d5Brian Paul#include "main/macros.h" 300070d398d13759adc519f9bc764ffd39bc88890eBrian Paul#include "s_aaline.h" 31cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell#include "s_context.h" 32cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell#include "s_feedback.h" 33b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul#include "s_lines.h" 34b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul#include "s_span.h" 35e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 36e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 37b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul/* 38b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul * Init the mask[] array to implement a line stipple. 39b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul */ 40b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paulstatic void 41b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paulcompute_stipple_mask( GLcontext *ctx, GLuint len, GLubyte mask[] ) 42b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul{ 43b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul SWcontext *swrast = SWRAST_CONTEXT(ctx); 44b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul GLuint i; 45e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 46b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul for (i = 0; i < len; i++) { 47b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul GLuint bit = (swrast->StippleCounter / ctx->Line.StippleFactor) & 0xf; 48b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul if ((1 << bit) & ctx->Line.StipplePattern) { 49b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul mask[i] = GL_TRUE; 50b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 51b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul else { 52b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul mask[i] = GL_FALSE; 53b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 54b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul swrast->StippleCounter++; 55b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 56b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul} 57e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 58e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 59e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell/* 60b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul * To draw a wide line we can simply redraw the span N times, side by side. 61e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell */ 62b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paulstatic void 63cdb27e8242215271364602995d85607cfc06d441Brian Pauldraw_wide_line( GLcontext *ctx, SWspan *span, GLboolean xMajor ) 64e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell{ 65af2aa8e9cf88a9ee3ec338eddc9a47bf2f142cb7Brian const GLint width = (GLint) CLAMP(ctx->Line.Width, 66af2aa8e9cf88a9ee3ec338eddc9a47bf2f142cb7Brian ctx->Const.MinLineWidth, 67af2aa8e9cf88a9ee3ec338eddc9a47bf2f142cb7Brian ctx->Const.MaxLineWidth); 68af2aa8e9cf88a9ee3ec338eddc9a47bf2f142cb7Brian GLint start; 69cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell 70b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul ASSERT(span->end < MAX_WIDTH); 71e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 72b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul if (width & 1) 73b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul start = width / 2; 74b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul else 75b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul start = width / 2 - 1; 76b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul 77b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul if (xMajor) { 7877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul GLint *y = span->array->y; 79a670c1280b78e6da3b298b61f623e4c733c6be94Brian Paul GLuint i; 80a670c1280b78e6da3b298b61f623e4c733c6be94Brian Paul GLint w; 81b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul for (w = 0; w < width; w++) { 82b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul if (w == 0) { 83b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul for (i = 0; i < span->end; i++) 8477df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul y[i] -= start; 85b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 86b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul else { 87b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul for (i = 0; i < span->end; i++) 8877df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul y[i]++; 89b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 90a803b0c891404dcd7c376e91f6a033cd4e42abc3Brian Paul if (ctx->Visual.rgbMode) 9145bc887da226403f2c41077e40ca38b6f60f1359Brian Paul _swrast_write_rgba_span(ctx, span); 92b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul else 9345bc887da226403f2c41077e40ca38b6f60f1359Brian Paul _swrast_write_index_span(ctx, span); 94b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 95b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 96b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul else { 9777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul GLint *x = span->array->x; 98a670c1280b78e6da3b298b61f623e4c733c6be94Brian Paul GLuint i; 99a670c1280b78e6da3b298b61f623e4c733c6be94Brian Paul GLint w; 100b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul for (w = 0; w < width; w++) { 101b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul if (w == 0) { 102b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul for (i = 0; i < span->end; i++) 10377df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul x[i] -= start; 104b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 105b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul else { 106b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul for (i = 0; i < span->end; i++) 10777df88727cb0a423dd5cb41498c2302d9df4fce7Brian Paul x[i]++; 108b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 109a803b0c891404dcd7c376e91f6a033cd4e42abc3Brian Paul if (ctx->Visual.rgbMode) 11045bc887da226403f2c41077e40ca38b6f60f1359Brian Paul _swrast_write_rgba_span(ctx, span); 111b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul else 11245bc887da226403f2c41077e40ca38b6f60f1359Brian Paul _swrast_write_index_span(ctx, span); 113b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 114b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 115e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell} 116e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 117e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 118e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 119b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul/**********************************************************************/ 120b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul/***** Rasterization *****/ 121b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul/**********************************************************************/ 122b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul 12322a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul/* Simple color index line (no stipple, width=1, no Z, no fog, no tex)*/ 1249e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian#define NAME simple_no_z_ci_line 12522a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define INTERP_INDEX 12645bc887da226403f2c41077e40ca38b6f60f1359Brian Paul#define RENDER_SPAN(span) _swrast_write_index_span(ctx, &span) 127e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#include "s_linetemp.h" 128e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 12922a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul/* Simple RGBA index line (no stipple, width=1, no Z, no fog, no tex)*/ 1309e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian#define NAME simple_no_z_rgba_line 13122a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define INTERP_RGBA 13245bc887da226403f2c41077e40ca38b6f60f1359Brian Paul#define RENDER_SPAN(span) _swrast_write_rgba_span(ctx, &span); 133e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#include "s_linetemp.h" 134e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 135e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 13622a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul/* Z, fog, wide, stipple color index line */ 1379e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian#define NAME ci_line 13822a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define INTERP_INDEX 13922a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define INTERP_Z 1409e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian#define INTERP_ATTRIBS /* for fog */ 14122a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define RENDER_SPAN(span) \ 14222a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul if (ctx->Line.StippleFlag) { \ 14322a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul span.arrayMask |= SPAN_MASK; \ 144dc24230de7f913969b52dee3579bb8fa3d50a8c0Karl Schultz compute_stipple_mask(ctx, span.end, span.array->mask); \ 14522a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul } \ 146af2aa8e9cf88a9ee3ec338eddc9a47bf2f142cb7Brian if (ctx->Line.Width > 1.0) { \ 147dc24230de7f913969b52dee3579bb8fa3d50a8c0Karl Schultz draw_wide_line(ctx, &span, (GLboolean)(dx > dy)); \ 14822a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul } \ 14922a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul else { \ 15045bc887da226403f2c41077e40ca38b6f60f1359Brian Paul _swrast_write_index_span(ctx, &span); \ 151b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul } 152e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#include "s_linetemp.h" 153e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 154e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 15522a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul/* Z, fog, wide, stipple RGBA line */ 1569e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian#define NAME rgba_line 15722a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define INTERP_RGBA 15822a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define INTERP_Z 15922a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define RENDER_SPAN(span) \ 16022a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul if (ctx->Line.StippleFlag) { \ 16122a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul span.arrayMask |= SPAN_MASK; \ 16222a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul compute_stipple_mask(ctx, span.end, span.array->mask); \ 16322a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul } \ 164af2aa8e9cf88a9ee3ec338eddc9a47bf2f142cb7Brian if (ctx->Line.Width > 1.0) { \ 165dc24230de7f913969b52dee3579bb8fa3d50a8c0Karl Schultz draw_wide_line(ctx, &span, (GLboolean)(dx > dy)); \ 16622a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul } \ 16722a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul else { \ 16845bc887da226403f2c41077e40ca38b6f60f1359Brian Paul _swrast_write_rgba_span(ctx, &span); \ 169e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 170e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#include "s_linetemp.h" 171b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul 172e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 1739e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian/* General-purpose line (any/all features). */ 1749e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian#define NAME general_line 17522a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define INTERP_RGBA 17622a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define INTERP_Z 1779ede048127ea71282fd97e01516dedcfb03e2a23Brian#define INTERP_ATTRIBS 17822a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul#define RENDER_SPAN(span) \ 17922a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul if (ctx->Line.StippleFlag) { \ 18022a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul span.arrayMask |= SPAN_MASK; \ 18122a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul compute_stipple_mask(ctx, span.end, span.array->mask); \ 18222a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul } \ 183af2aa8e9cf88a9ee3ec338eddc9a47bf2f142cb7Brian if (ctx->Line.Width > 1.0) { \ 184dc24230de7f913969b52dee3579bb8fa3d50a8c0Karl Schultz draw_wide_line(ctx, &span, (GLboolean)(dx > dy)); \ 18522a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul } \ 18622a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul else { \ 187a803b0c891404dcd7c376e91f6a033cd4e42abc3Brian Paul _swrast_write_rgba_span(ctx, &span); \ 188e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 189e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell#include "s_linetemp.h" 190b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul 191e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 192e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 19322a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paulvoid 1949e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian_swrast_add_spec_terms_line(GLcontext *ctx, 1959e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian const SWvertex *v0, const SWvertex *v1) 19646b0988c673b28e072fd0cbf477632a9ab6f9f18Keith Whitwell{ 19746b0988c673b28e072fd0cbf477632a9ab6f9f18Keith Whitwell SWvertex *ncv0 = (SWvertex *)v0; 19846b0988c673b28e072fd0cbf477632a9ab6f9f18Keith Whitwell SWvertex *ncv1 = (SWvertex *)v1; 1999e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian GLfloat rSum, gSum, bSum; 2009e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian GLchan cSave[2][4]; 2019e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian 2029e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian /* save original colors */ 2039e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian COPY_CHAN4(cSave[0], ncv0->color); 2049e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian COPY_CHAN4(cSave[1], ncv1->color); 2059e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian /* sum v0 */ 2069e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian rSum = CHAN_TO_FLOAT(ncv0->color[0]) + ncv0->attrib[FRAG_ATTRIB_COL1][0]; 2079e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian gSum = CHAN_TO_FLOAT(ncv0->color[1]) + ncv0->attrib[FRAG_ATTRIB_COL1][1]; 2089e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian bSum = CHAN_TO_FLOAT(ncv0->color[2]) + ncv0->attrib[FRAG_ATTRIB_COL1][2]; 2099e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[0], rSum); 2109e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[1], gSum); 2119e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian UNCLAMPED_FLOAT_TO_CHAN(ncv0->color[2], bSum); 2129e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian /* sum v1 */ 2139e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian rSum = CHAN_TO_FLOAT(ncv1->color[0]) + ncv1->attrib[FRAG_ATTRIB_COL1][0]; 2149e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian gSum = CHAN_TO_FLOAT(ncv1->color[1]) + ncv1->attrib[FRAG_ATTRIB_COL1][1]; 2159e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian bSum = CHAN_TO_FLOAT(ncv1->color[2]) + ncv1->attrib[FRAG_ATTRIB_COL1][2]; 2169e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[0], rSum); 2179e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[1], gSum); 2189e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian UNCLAMPED_FLOAT_TO_CHAN(ncv1->color[2], bSum); 2199e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian /* draw */ 22046b0988c673b28e072fd0cbf477632a9ab6f9f18Keith Whitwell SWRAST_CONTEXT(ctx)->SpecLine( ctx, ncv0, ncv1 ); 2219e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian /* restore original colors */ 2229e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian COPY_CHAN4( ncv0->attrib[FRAG_ATTRIB_COL0], cSave[0] ); 2239e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian COPY_CHAN4( ncv1->attrib[FRAG_ATTRIB_COL0], cSave[1] ); 22446b0988c673b28e072fd0cbf477632a9ab6f9f18Keith Whitwell} 22546b0988c673b28e072fd0cbf477632a9ab6f9f18Keith Whitwell 226e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 227e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 228233aafbb30594d0193b00705d0532be97060ebd1Brian Paul#ifdef DEBUG 229233aafbb30594d0193b00705d0532be97060ebd1Brian Paul 230233aafbb30594d0193b00705d0532be97060ebd1Brian Paul/* record the current line function name */ 231233aafbb30594d0193b00705d0532be97060ebd1Brian Paulstatic const char *lineFuncName = NULL; 232233aafbb30594d0193b00705d0532be97060ebd1Brian Paul 233233aafbb30594d0193b00705d0532be97060ebd1Brian Paul#define USE(lineFunc) \ 234233aafbb30594d0193b00705d0532be97060ebd1Brian Pauldo { \ 235233aafbb30594d0193b00705d0532be97060ebd1Brian Paul lineFuncName = #lineFunc; \ 236298be2b028263b2c343a707662c6fbfa18293cb2Kristian Høgsberg /*printf("%s\n", lineFuncName);*/ \ 237233aafbb30594d0193b00705d0532be97060ebd1Brian Paul swrast->Line = lineFunc; \ 238233aafbb30594d0193b00705d0532be97060ebd1Brian Paul} while (0) 239233aafbb30594d0193b00705d0532be97060ebd1Brian Paul 240233aafbb30594d0193b00705d0532be97060ebd1Brian Paul#else 241233aafbb30594d0193b00705d0532be97060ebd1Brian Paul 242c123a9b2edc5852cb50485f344219508254081a8Brian Paul#define USE(lineFunc) swrast->Line = lineFunc 243233aafbb30594d0193b00705d0532be97060ebd1Brian Paul 244233aafbb30594d0193b00705d0532be97060ebd1Brian Paul#endif 245233aafbb30594d0193b00705d0532be97060ebd1Brian Paul 246233aafbb30594d0193b00705d0532be97060ebd1Brian Paul 247233aafbb30594d0193b00705d0532be97060ebd1Brian Paul 2489e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian/** 249e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * Determine which line drawing function to use given the current 250e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * rendering context. 251e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * 252e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * Please update the summary flag _SWRAST_NEW_LINE if you add or remove 253e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell * tests to this code. 254e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell */ 255e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwellvoid 256cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell_swrast_choose_line( GLcontext *ctx ) 257e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell{ 258cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0Keith Whitwell SWcontext *swrast = SWRAST_CONTEXT(ctx); 259b6bcae5698df88f7730d40004ce7ce0462e97a20Brian Paul const GLboolean rgbmode = ctx->Visual.rgbMode; 2609e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian GLboolean specular = (ctx->Fog.ColorSumEnabled || 2619e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian (ctx->Light.Enabled && 2629e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)); 263e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell 264b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul if (ctx->RenderMode == GL_RENDER) { 265e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell if (ctx->Line.SmoothFlag) { 266e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell /* antialiased lines */ 2670070d398d13759adc519f9bc764ffd39bc88890eBrian Paul _swrast_choose_aa_line_function(ctx); 26864b4298181373d64ef2226935f70e9062536de8bBrian Paul ASSERT(swrast->Line); 269e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 270ccea3ff8a9eae16d2ca11b9cedef1318cffe3fb4Brian else if (ctx->Texture._EnabledCoordUnits 2719e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian || ctx->FragmentProgram._Current 2729e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian || swrast->_FogEnabled 2739e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian || specular) { 2749e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian USE(general_line); 275e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 2769e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian else if (ctx->Depth.Test 277af2aa8e9cf88a9ee3ec338eddc9a47bf2f142cb7Brian || ctx->Line.Width != 1.0 27822a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul || ctx->Line.StippleFlag) { 27922a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul /* no texture, but Z, fog, width>1, stipple, etc. */ 28022a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul if (rgbmode) 281efda5cb6263631175aa2efe46df9322b3c5775eeBrian#if CHAN_BITS == 32 282efda5cb6263631175aa2efe46df9322b3c5775eeBrian USE(general_line); 283efda5cb6263631175aa2efe46df9322b3c5775eeBrian#else 2849e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian USE(rgba_line); 285efda5cb6263631175aa2efe46df9322b3c5775eeBrian#endif 28622a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul else 2879e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian USE(ci_line); 28822a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul } 289e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell else { 2909e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian ASSERT(!ctx->Depth.Test); 291af2aa8e9cf88a9ee3ec338eddc9a47bf2f142cb7Brian ASSERT(ctx->Line.Width == 1.0); 2929e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian /* simple lines */ 29322a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul if (rgbmode) 2949e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian USE(simple_no_z_rgba_line); 29522a47c5251ee7b91dc8f7f4f7dbeb3ad5a117b70Brian Paul else 2969e8a961dd7d7b717a9fb4ecdea1c1b60ea355efeBrian USE(simple_no_z_ci_line); 297e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 298e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 299b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul else if (ctx->RenderMode == GL_FEEDBACK) { 30045bc887da226403f2c41077e40ca38b6f60f1359Brian Paul USE(_swrast_feedback_line); 301e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 302e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell else { 303b37a084357dd08573b86d6d8c5ba43d65bdc1bd7Brian Paul ASSERT(ctx->RenderMode == GL_SELECT); 30445bc887da226403f2c41077e40ca38b6f60f1359Brian Paul USE(_swrast_select_line); 305e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell } 306e3a051e0538a605551f4d58294c94f5eb00ed07fKeith Whitwell} 307