diff options
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_aalinetemp.h')
| -rw-r--r-- | nx-X11/extras/Mesa/src/mesa/swrast/s_aalinetemp.h | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_aalinetemp.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_aalinetemp.h new file mode 100644 index 000000000..4a1e1ebda --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_aalinetemp.h @@ -0,0 +1,329 @@ +/* + * Mesa 3-D graphics library + * Version: 6.3 + * + * Copyright (C) 1999-2004 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + + +/* + * Antialiased line template. + */ + + +/* + * Function to render each fragment in the AA line. + * \param ix - integer fragment window X coordiante + * \param iy - integer fragment window Y coordiante + */ +static void +NAME(plot)(GLcontext *ctx, struct LineInfo *line, int ix, int iy) +{ + const GLfloat fx = (GLfloat) ix; + const GLfloat fy = (GLfloat) iy; +#ifdef DO_INDEX + const GLfloat coverage = compute_coveragei(line, ix, iy); +#else + const GLfloat coverage = compute_coveragef(line, ix, iy); +#endif + const GLuint i = line->span.end; + + if (coverage == 0.0) + return; + + line->span.end++; + line->span.array->coverage[i] = coverage; + line->span.array->x[i] = ix; + line->span.array->y[i] = iy; + + /* + * Compute Z, color, texture coords, fog for the fragment by + * solving the plane equations at (ix,iy). + */ +#ifdef DO_Z + line->span.array->z[i] = (GLdepth) IROUND(solve_plane(fx, fy, line->zPlane)); +#endif +#ifdef DO_FOG + line->span.array->fog[i] = solve_plane(fx, fy, line->fPlane); +#endif +#ifdef DO_RGBA + line->span.array->rgba[i][RCOMP] = solve_plane_chan(fx, fy, line->rPlane); + line->span.array->rgba[i][GCOMP] = solve_plane_chan(fx, fy, line->gPlane); + line->span.array->rgba[i][BCOMP] = solve_plane_chan(fx, fy, line->bPlane); + line->span.array->rgba[i][ACOMP] = solve_plane_chan(fx, fy, line->aPlane); +#endif +#ifdef DO_INDEX + line->span.array->index[i] = (GLint) solve_plane(fx, fy, line->iPlane); +#endif +#ifdef DO_SPEC + line->span.array->spec[i][RCOMP] = solve_plane_chan(fx, fy, line->srPlane); + line->span.array->spec[i][GCOMP] = solve_plane_chan(fx, fy, line->sgPlane); + line->span.array->spec[i][BCOMP] = solve_plane_chan(fx, fy, line->sbPlane); +#endif +#ifdef DO_TEX + { + GLfloat invQ; + if (ctx->FragmentProgram._Active) { + invQ = 1.0F; + } + else { + invQ = solve_plane_recip(fx, fy, line->vPlane[0]); + } + line->span.array->texcoords[0][i][0] = solve_plane(fx, fy, line->sPlane[0]) * invQ; + line->span.array->texcoords[0][i][1] = solve_plane(fx, fy, line->tPlane[0]) * invQ; + line->span.array->texcoords[0][i][2] = solve_plane(fx, fy, line->uPlane[0]) * invQ; + line->span.array->lambda[0][i] = compute_lambda(line->sPlane[0], + line->tPlane[0], invQ, + line->texWidth[0], + line->texHeight[0]); + } +#elif defined(DO_MULTITEX) + { + GLuint unit; + for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { + if (ctx->Texture.Unit[unit]._ReallyEnabled) { + GLfloat invQ; + if (ctx->FragmentProgram._Active) { + invQ = 1.0F; + } + else { + invQ = solve_plane_recip(fx, fy, line->vPlane[unit]); + } + line->span.array->texcoords[unit][i][0] = solve_plane(fx, fy, line->sPlane[unit]) * invQ; + line->span.array->texcoords[unit][i][1] = solve_plane(fx, fy, line->tPlane[unit]) * invQ; + line->span.array->texcoords[unit][i][2] = solve_plane(fx, fy, line->uPlane[unit]) * invQ; + line->span.array->lambda[unit][i] = compute_lambda(line->sPlane[unit], + line->tPlane[unit], invQ, + line->texWidth[unit], line->texHeight[unit]); + } + } + } +#endif + + if (line->span.end == MAX_WIDTH) { +#if defined(DO_RGBA) + _swrast_write_rgba_span(ctx, &(line->span)); +#else + _swrast_write_index_span(ctx, &(line->span)); +#endif + line->span.end = 0; /* reset counter */ + } +} + + + +/* + * Line setup + */ +static void +NAME(line)(GLcontext *ctx, const SWvertex *v0, const SWvertex *v1) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + GLfloat tStart, tEnd; /* segment start, end along line length */ + GLboolean inSegment; + GLint iLen, i; + + /* Init the LineInfo struct */ + struct LineInfo line; + line.x0 = v0->win[0]; + line.y0 = v0->win[1]; + line.x1 = v1->win[0]; + line.y1 = v1->win[1]; + line.dx = line.x1 - line.x0; + line.dy = line.y1 - line.y0; + line.len = SQRTF(line.dx * line.dx + line.dy * line.dy); + line.halfWidth = 0.5F * ctx->Line._Width; + + if (line.len == 0.0 || IS_INF_OR_NAN(line.len)) + return; + + INIT_SPAN(line.span, GL_LINE, 0, 0, SPAN_XY | SPAN_COVERAGE); + + line.xAdj = line.dx / line.len * line.halfWidth; + line.yAdj = line.dy / line.len * line.halfWidth; + +#ifdef DO_Z + line.span.arrayMask |= SPAN_Z; + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->win[2], v1->win[2], line.zPlane); +#endif +#ifdef DO_FOG + line.span.arrayMask |= SPAN_FOG; + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->fog, v1->fog, line.fPlane); +#endif +#ifdef DO_RGBA + line.span.arrayMask |= SPAN_RGBA; + if (ctx->Light.ShadeModel == GL_SMOOTH) { + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->color[RCOMP], v1->color[RCOMP], line.rPlane); + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->color[GCOMP], v1->color[GCOMP], line.gPlane); + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->color[BCOMP], v1->color[BCOMP], line.bPlane); + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->color[ACOMP], v1->color[ACOMP], line.aPlane); + } + else { + constant_plane(v1->color[RCOMP], line.rPlane); + constant_plane(v1->color[GCOMP], line.gPlane); + constant_plane(v1->color[BCOMP], line.bPlane); + constant_plane(v1->color[ACOMP], line.aPlane); + } +#endif +#ifdef DO_SPEC + line.span.arrayMask |= SPAN_SPEC; + if (ctx->Light.ShadeModel == GL_SMOOTH) { + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->specular[RCOMP], v1->specular[RCOMP], line.srPlane); + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->specular[GCOMP], v1->specular[GCOMP], line.sgPlane); + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->specular[BCOMP], v1->specular[BCOMP], line.sbPlane); + } + else { + constant_plane(v1->specular[RCOMP], line.srPlane); + constant_plane(v1->specular[GCOMP], line.sgPlane); + constant_plane(v1->specular[BCOMP], line.sbPlane); + } +#endif +#ifdef DO_INDEX + line.span.arrayMask |= SPAN_INDEX; + if (ctx->Light.ShadeModel == GL_SMOOTH) { + compute_plane(line.x0, line.y0, line.x1, line.y1, + v0->index, v1->index, line.iPlane); + } + else { + constant_plane(v1->index, line.iPlane); + } +#endif +#ifdef DO_TEX + { + const struct gl_texture_object *obj = ctx->Texture.Unit[0]._Current; + const struct gl_texture_image *texImage = obj->Image[0][obj->BaseLevel]; + const GLfloat invW0 = v0->win[3]; + const GLfloat invW1 = v1->win[3]; + const GLfloat s0 = v0->texcoord[0][0] * invW0; + const GLfloat s1 = v1->texcoord[0][0] * invW1; + const GLfloat t0 = v0->texcoord[0][1] * invW0; + const GLfloat t1 = v1->texcoord[0][1] * invW1; + const GLfloat r0 = v0->texcoord[0][2] * invW0; + const GLfloat r1 = v1->texcoord[0][2] * invW1; + const GLfloat q0 = v0->texcoord[0][3] * invW0; + const GLfloat q1 = v1->texcoord[0][3] * invW1; + line.span.arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA); + compute_plane(line.x0, line.y0, line.x1, line.y1, s0, s1, line.sPlane[0]); + compute_plane(line.x0, line.y0, line.x1, line.y1, t0, t1, line.tPlane[0]); + compute_plane(line.x0, line.y0, line.x1, line.y1, r0, r1, line.uPlane[0]); + compute_plane(line.x0, line.y0, line.x1, line.y1, q0, q1, line.vPlane[0]); + line.texWidth[0] = (GLfloat) texImage->Width; + line.texHeight[0] = (GLfloat) texImage->Height; + } +#elif defined(DO_MULTITEX) + { + GLuint u; + line.span.arrayMask |= (SPAN_TEXTURE | SPAN_LAMBDA); + for (u = 0; u < ctx->Const.MaxTextureUnits; u++) { + if (ctx->Texture.Unit[u]._ReallyEnabled) { + const struct gl_texture_object *obj = ctx->Texture.Unit[u]._Current; + const struct gl_texture_image *texImage = obj->Image[0][obj->BaseLevel]; + const GLfloat invW0 = v0->win[3]; + const GLfloat invW1 = v1->win[3]; + const GLfloat s0 = v0->texcoord[u][0] * invW0; + const GLfloat s1 = v1->texcoord[u][0] * invW1; + const GLfloat t0 = v0->texcoord[u][1] * invW0; + const GLfloat t1 = v1->texcoord[u][1] * invW1; + const GLfloat r0 = v0->texcoord[u][2] * invW0; + const GLfloat r1 = v1->texcoord[u][2] * invW1; + const GLfloat q0 = v0->texcoord[u][3] * invW0; + const GLfloat q1 = v1->texcoord[u][3] * invW1; + compute_plane(line.x0, line.y0, line.x1, line.y1, s0, s1, line.sPlane[u]); + compute_plane(line.x0, line.y0, line.x1, line.y1, t0, t1, line.tPlane[u]); + compute_plane(line.x0, line.y0, line.x1, line.y1, r0, r1, line.uPlane[u]); + compute_plane(line.x0, line.y0, line.x1, line.y1, q0, q1, line.vPlane[u]); + line.texWidth[u] = (GLfloat) texImage->Width; + line.texHeight[u] = (GLfloat) texImage->Height; + } + } + } +#endif + + tStart = tEnd = 0.0; + inSegment = GL_FALSE; + iLen = (GLint) line.len; + + if (ctx->Line.StippleFlag) { + for (i = 0; i < iLen; i++) { + const GLuint bit = (swrast->StippleCounter / ctx->Line.StippleFactor) & 0xf; + if ((1 << bit) & ctx->Line.StipplePattern) { + /* stipple bit is on */ + const GLfloat t = (GLfloat) i / (GLfloat) line.len; + if (!inSegment) { + /* start new segment */ + inSegment = GL_TRUE; + tStart = t; + } + else { + /* still in the segment, extend it */ + tEnd = t; + } + } + else { + /* stipple bit is off */ + if (inSegment && (tEnd > tStart)) { + /* draw the segment */ + segment(ctx, &line, NAME(plot), tStart, tEnd); + inSegment = GL_FALSE; + } + else { + /* still between segments, do nothing */ + } + } + swrast->StippleCounter++; + } + + if (inSegment) { + /* draw the final segment of the line */ + segment(ctx, &line, NAME(plot), tStart, 1.0F); + } + } + else { + /* non-stippled */ + segment(ctx, &line, NAME(plot), 0.0, 1.0); + } + +#if defined(DO_RGBA) + _swrast_write_rgba_span(ctx, &(line.span)); +#else + _swrast_write_index_span(ctx, &(line.span)); +#endif +} + + + + +#undef DO_Z +#undef DO_FOG +#undef DO_RGBA +#undef DO_INDEX +#undef DO_SPEC +#undef DO_TEX +#undef DO_MULTITEX +#undef NAME |