1f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/* 2f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Mesa 3-D graphics library 3f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Version: 7.1 4f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 5f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. 6f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 7f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Permission is hereby granted, free of charge, to any person obtaining a 8f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * copy of this software and associated documentation files (the "Software"), 9f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * to deal in the Software without restriction, including without limitation 10f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * and/or sell copies of the Software, and to permit persons to whom the 12f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Software is furnished to do so, subject to the following conditions: 13f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 14f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * The above copyright notice and this permission notice shall be included 15f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * in all copies or substantial portions of the Software. 16f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 17f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 24f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 25f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 26f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/* 27f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Antialiased line template. 28f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 29f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 30f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 31f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/* 32f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Function to render each fragment in the AA line. 33f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * \param ix - integer fragment window X coordiante 34f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * \param iy - integer fragment window Y coordiante 35f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 36f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic void 37f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgNAME(plot)(struct gl_context *ctx, struct LineInfo *line, int ix, int iy) 38f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 39f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const SWcontext *swrast = SWRAST_CONTEXT(ctx); 40f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat fx = (GLfloat) ix; 41f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat fy = (GLfloat) iy; 42f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat coverage = compute_coveragef(line, ix, iy); 43f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLuint i = line->span.end; 44f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 45f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org (void) swrast; 46f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 47f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (coverage == 0.0) 48f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return; 49f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 50f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.end++; 51f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.array->coverage[i] = coverage; 52f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.array->x[i] = ix; 53f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.array->y[i] = iy; 54f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 55f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* 56f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Compute Z, color, texture coords, fog for the fragment by 57f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * solving the plane equations at (ix,iy). 58f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 59f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#ifdef DO_Z 60f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.array->z[i] = (GLuint) solve_plane(fx, fy, line->zPlane); 61f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#endif 62f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.array->rgba[i][RCOMP] = solve_plane_chan(fx, fy, line->rPlane); 63f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.array->rgba[i][GCOMP] = solve_plane_chan(fx, fy, line->gPlane); 64f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.array->rgba[i][BCOMP] = solve_plane_chan(fx, fy, line->bPlane); 65f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.array->rgba[i][ACOMP] = solve_plane_chan(fx, fy, line->aPlane); 66f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#if defined(DO_ATTRIBS) 67f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ATTRIB_LOOP_BEGIN 68f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLfloat (*attribArray)[4] = line->span.array->attribs[attr]; 69f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (attr >= FRAG_ATTRIB_TEX0 && attr < FRAG_ATTRIB_VAR0 70f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org && !_swrast_use_fragment_program(ctx)) { 71f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* texcoord w/ divide by Q */ 72f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLuint unit = attr - FRAG_ATTRIB_TEX0; 73f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat invQ = solve_plane_recip(fx, fy, line->attrPlane[attr][3]); 74f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLuint c; 75f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org for (c = 0; c < 3; c++) { 76f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org attribArray[i][c] = solve_plane(fx, fy, line->attrPlane[attr][c]) * invQ; 77f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 78f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.array->lambda[unit][i] 79f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org = compute_lambda(line->attrPlane[attr][0], 80f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->attrPlane[attr][1], invQ, 81f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->texWidth[attr], line->texHeight[attr]); 82f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 83f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else { 84f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* non-texture attrib */ 85f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat invW = solve_plane_recip(fx, fy, line->wPlane); 86f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLuint c; 87f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org for (c = 0; c < 4; c++) { 88f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org attribArray[i][c] = solve_plane(fx, fy, line->attrPlane[attr][c]) * invW; 89f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 90f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 91f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ATTRIB_LOOP_END 92f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#endif 93f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 94f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (line->span.end == SWRAST_MAX_WIDTH) { 95f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org _swrast_write_rgba_span(ctx, &(line->span)); 96f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line->span.end = 0; /* reset counter */ 97f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 98f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 99f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 100f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 101f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 102f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/* 103f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Line setup 104f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 105f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic void 106f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgNAME(line)(struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1) 107f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 108f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org SWcontext *swrast = SWRAST_CONTEXT(ctx); 109f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLfloat tStart, tEnd; /* segment start, end along line length */ 110f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLboolean inSegment; 111f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLint iLen, i; 112f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 113f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* Init the LineInfo struct */ 114f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org struct LineInfo line; 115f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.x0 = v0->attrib[FRAG_ATTRIB_WPOS][0]; 116f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.y0 = v0->attrib[FRAG_ATTRIB_WPOS][1]; 117f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.x1 = v1->attrib[FRAG_ATTRIB_WPOS][0]; 118f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.y1 = v1->attrib[FRAG_ATTRIB_WPOS][1]; 119f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.dx = line.x1 - line.x0; 120f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.dy = line.y1 - line.y0; 121f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.len = SQRTF(line.dx * line.dx + line.dy * line.dy); 122f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.halfWidth = 0.5F * CLAMP(ctx->Line.Width, 123f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ctx->Const.MinLineWidthAA, 124f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ctx->Const.MaxLineWidthAA); 125f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 126f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (line.len == 0.0 || IS_INF_OR_NAN(line.len)) 127f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return; 128f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 129f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org INIT_SPAN(line.span, GL_LINE); 130f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.span.arrayMask = SPAN_XY | SPAN_COVERAGE; 131f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.span.facing = swrast->PointLineFacing; 132f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.xAdj = line.dx / line.len * line.halfWidth; 133f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.yAdj = line.dy / line.len * line.halfWidth; 134f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 135f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#ifdef DO_Z 136f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.span.arrayMask |= SPAN_Z; 137f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org compute_plane(line.x0, line.y0, line.x1, line.y1, 138f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org v0->attrib[FRAG_ATTRIB_WPOS][2], v1->attrib[FRAG_ATTRIB_WPOS][2], line.zPlane); 139f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#endif 140f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.span.arrayMask |= SPAN_RGBA; 141f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (ctx->Light.ShadeModel == GL_SMOOTH) { 142f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org compute_plane(line.x0, line.y0, line.x1, line.y1, 143f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org v0->color[RCOMP], v1->color[RCOMP], line.rPlane); 144f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org compute_plane(line.x0, line.y0, line.x1, line.y1, 145f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org v0->color[GCOMP], v1->color[GCOMP], line.gPlane); 146f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org compute_plane(line.x0, line.y0, line.x1, line.y1, 147f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org v0->color[BCOMP], v1->color[BCOMP], line.bPlane); 148f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org compute_plane(line.x0, line.y0, line.x1, line.y1, 149f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org v0->color[ACOMP], v1->color[ACOMP], line.aPlane); 150f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 151f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else { 152f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org constant_plane(v1->color[RCOMP], line.rPlane); 153f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org constant_plane(v1->color[GCOMP], line.gPlane); 154f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org constant_plane(v1->color[BCOMP], line.bPlane); 155f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org constant_plane(v1->color[ACOMP], line.aPlane); 156f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 157f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#if defined(DO_ATTRIBS) 158f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org { 159f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat invW0 = v0->attrib[FRAG_ATTRIB_WPOS][3]; 160f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat invW1 = v1->attrib[FRAG_ATTRIB_WPOS][3]; 161f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.span.arrayMask |= SPAN_LAMBDA; 162f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org compute_plane(line.x0, line.y0, line.x1, line.y1, invW0, invW1, line.wPlane); 163f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ATTRIB_LOOP_BEGIN 164f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLuint c; 165f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (swrast->_InterpMode[attr] == GL_FLAT) { 166f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org for (c = 0; c < 4; c++) { 167f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org constant_plane(v1->attrib[attr][c], line.attrPlane[attr][c]); 168f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 169f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 170f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else { 171f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org for (c = 0; c < 4; c++) { 172f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat a0 = v0->attrib[attr][c] * invW0; 173f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat a1 = v1->attrib[attr][c] * invW1; 174f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org compute_plane(line.x0, line.y0, line.x1, line.y1, a0, a1, 175f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.attrPlane[attr][c]); 176f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 177f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 178f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.span.arrayAttribs |= BITFIELD64_BIT(attr); 179f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (attr >= FRAG_ATTRIB_TEX0 && attr < FRAG_ATTRIB_VAR0) { 180f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLuint u = attr - FRAG_ATTRIB_TEX0; 181f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const struct gl_texture_object *obj = ctx->Texture.Unit[u]._Current; 182f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const struct gl_texture_image *texImage = obj->Image[0][obj->BaseLevel]; 183f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.texWidth[attr] = (GLfloat) texImage->Width; 184f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org line.texHeight[attr] = (GLfloat) texImage->Height; 185f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 186f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ATTRIB_LOOP_END 187f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 188f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#endif 189f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 190f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org tStart = tEnd = 0.0; 191f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org inSegment = GL_FALSE; 192f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org iLen = (GLint) line.len; 193f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 194f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (ctx->Line.StippleFlag) { 195f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org for (i = 0; i < iLen; i++) { 196f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLuint bit = (swrast->StippleCounter / ctx->Line.StippleFactor) & 0xf; 197f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ((1 << bit) & ctx->Line.StipplePattern) { 198f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* stipple bit is on */ 199f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLfloat t = (GLfloat) i / (GLfloat) line.len; 200f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (!inSegment) { 201f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* start new segment */ 202f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org inSegment = GL_TRUE; 203f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org tStart = t; 204f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 205f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else { 206f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* still in the segment, extend it */ 207f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org tEnd = t; 208f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 209f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 210f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else { 211f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* stipple bit is off */ 212f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (inSegment && (tEnd > tStart)) { 213f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* draw the segment */ 214f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org segment(ctx, &line, NAME(plot), tStart, tEnd); 215f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org inSegment = GL_FALSE; 216f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 217f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else { 218f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* still between segments, do nothing */ 219f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 220f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 221f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org swrast->StippleCounter++; 222f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 223f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 224f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (inSegment) { 225f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* draw the final segment of the line */ 226f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org segment(ctx, &line, NAME(plot), tStart, 1.0F); 227f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 228f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 229f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else { 230f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* non-stippled */ 231f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org segment(ctx, &line, NAME(plot), 0.0, 1.0); 232f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 233f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 234f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org _swrast_write_rgba_span(ctx, &(line.span)); 235f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 236f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 237f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 238f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 239f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 240f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#undef DO_Z 241f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#undef DO_ATTRIBS 242f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#undef NAME 243