-/* $Id: s_aalinetemp.h,v 1.14 2001/09/19 20:30:44 kschultz Exp $ */
+/* $Id: s_aalinetemp.h,v 1.21 2002/08/07 00:45:07 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 4.1
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2002 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"),
* Function to render each fragment in the AA line.
*/
static void
-NAME(plot)(GLcontext *ctx, const struct LineInfo *line,
- struct pixel_buffer *pb, int ix, int iy)
+NAME(plot)(GLcontext *ctx, struct LineInfo *line, int ix, int iy)
{
const GLfloat fx = (GLfloat) ix;
const GLfloat fy = (GLfloat) iy;
const GLfloat coverage = compute_coveragef(line, ix, iy);
- GLdepth z;
- GLfloat fog;
-#ifdef DO_RGBA
- GLchan red, green, blue, alpha;
-#else
- GLint index;
-#endif
- GLchan specRed, specGreen, specBlue;
- GLfloat tex[MAX_TEXTURE_UNITS][4], lambda[MAX_TEXTURE_UNITS];
+ 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
- z = (GLdepth) solve_plane(fx, fy, line->zPlane);
-#else
- z = 0.0;
+ line->span.array->z[i] = (GLdepth) solve_plane(fx, fy, line->zPlane);
#endif
#ifdef DO_FOG
- fog = solve_plane(fx, fy, line->fPlane);
-#else
- fog = 0.0;
+ line->span.array->fog[i] = solve_plane(fx, fy, line->fPlane);
#endif
#ifdef DO_RGBA
- red = solve_plane_chan(fx, fy, line->rPlane);
- green = solve_plane_chan(fx, fy, line->gPlane);
- blue = solve_plane_chan(fx, fy, line->bPlane);
- alpha = solve_plane_chan(fx, fy, line->aPlane);
+ 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
- index = (GLint) solve_plane(fx, fy, line->iPlane);
+ line->span.array->index[i] = (GLint) solve_plane(fx, fy, line->iPlane);
#endif
#ifdef DO_SPEC
- specRed = solve_plane_chan(fx, fy, line->srPlane);
- specGreen = solve_plane_chan(fx, fy, line->sgPlane);
- specBlue = solve_plane_chan(fx, fy, line->sbPlane);
-#else
- (void) specRed;
- (void) specGreen;
- (void) specBlue;
+ 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 = solve_plane_recip(fx, fy, line->vPlane[0]);
- tex[0][0] = solve_plane(fx, fy, line->sPlane[0]) * invQ;
- tex[0][1] = solve_plane(fx, fy, line->tPlane[0]) * invQ;
- tex[0][2] = solve_plane(fx, fy, line->uPlane[0]) * invQ;
- lambda[0] = compute_lambda(line->sPlane[0], line->tPlane[0], invQ,
- line->texWidth[0], line->texHeight[0]);
+ const GLfloat 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 = solve_plane_recip(fx, fy, line->vPlane[unit]);
- tex[unit][0] = solve_plane(fx, fy, line->sPlane[unit]) * invQ;
- tex[unit][1] = solve_plane(fx, fy, line->tPlane[unit]) * invQ;
- tex[unit][2] = solve_plane(fx, fy, line->uPlane[unit]) * invQ;
- lambda[unit] = compute_lambda(line->sPlane[unit],
- line->tPlane[unit], invQ,
- line->texWidth[unit], line->texHeight[unit]);
+ const GLfloat 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]);
}
}
}
-#else
- (void) tex[0][0];
- (void) lambda[0];
#endif
-
- PB_COVERAGE(pb, coverage);
-
-#if defined(DO_MULTITEX)
-#if defined(DO_SPEC)
- PB_WRITE_MULTITEX_SPEC_PIXEL(pb, ix, iy, z, fog, red, green, blue, alpha,
- specRed, specGreen, specBlue, tex);
-#else
- PB_WRITE_MULTITEX_PIXEL(pb, ix, iy, z, fog, red, green, blue, alpha, tex);
-#endif
-#elif defined(DO_TEX)
- PB_WRITE_TEX_PIXEL(pb, ix, iy, z, fog, red, green, blue, alpha,
- tex[0][0], tex[0][1], tex[0][2]);
+ if (line->span.end == MAX_WIDTH) {
+#if defined(DO_TEX) || defined(DO_MULTITEX)
+ _mesa_write_texture_span(ctx, &(line->span));
#elif defined(DO_RGBA)
- PB_WRITE_RGBA_PIXEL(pb, ix, iy, z, fog, red, green, blue, alpha);
-#elif defined(DO_INDEX)
- PB_WRITE_CI_PIXEL(pb, ix, iy, z, fog, index);
+ _mesa_write_rgba_span(ctx, &(line->span));
+#else
+ _mesa_write_index_span(ctx, &(line->span));
#endif
-
- pb->haveCoverage = GL_TRUE;
- PB_CHECK_FLUSH(ctx, pb);
+ line->span.end = 0; /* reset counter */
+ }
}
NAME(line)(GLcontext *ctx, const SWvertex *v0, const SWvertex *v1)
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
- struct pixel_buffer *pb = SWRAST_CONTEXT(ctx)->PB;
GLfloat tStart, tEnd; /* segment start, end along line length */
GLboolean inSegment;
GLint iLen, i;
line.len = (GLfloat) sqrt(line.dx * line.dx + line.dy * line.dy);
line.halfWidth = 0.5F * ctx->Line.Width;
- if (line.len == 0.0)
+ 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);
}
#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);
}
#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,
(GLfloat) v0->index, (GLfloat) v1->index, line.iPlane);
const GLfloat r1 = v1->texcoord[0][2] * invW0;
const GLfloat q0 = v0->texcoord[0][3] * invW0;
const GLfloat q1 = v1->texcoord[0][3] * invW0;
+ 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]);
#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;
/* stipple bit is off */
if (inSegment && (tEnd > tStart)) {
/* draw the segment */
- segment(ctx, &line, NAME(plot), pb, tStart, tEnd);
+ segment(ctx, &line, NAME(plot), tStart, tEnd);
inSegment = GL_FALSE;
}
else {
if (inSegment) {
/* draw the final segment of the line */
- segment(ctx, &line, NAME(plot), pb, tStart, 1.0F);
+ segment(ctx, &line, NAME(plot), tStart, 1.0F);
}
}
else {
/* non-stippled */
- segment(ctx, &line, NAME(plot), pb, 0.0, 1.0);
+ segment(ctx, &line, NAME(plot), 0.0, 1.0);
}
+
+#if defined(DO_TEX) || defined(DO_MULTITEX)
+ _mesa_write_texture_span(ctx, &(line.span));
+#elif defined(DO_RGBA)
+ _mesa_write_rgba_span(ctx, &(line.span));
+#else
+ _mesa_write_index_span(ctx, &(line.span));
+#endif
}
projects / mesa.git / blobdiff