/*
* Mesa 3-D graphics library
- * Version: 6.5.3
+ * Version: 7.0.3
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* The following macros may be defined to indicate what auxillary information
* must be copmuted across the triangle:
* DO_Z - if defined, compute Z values
- * DO_RGBA - if defined, compute RGBA values
- * DO_INDEX - if defined, compute color index values
* DO_ATTRIBS - if defined, compute texcoords, varying, etc.
*/
#ifdef DO_Z
GLfloat zPlane[4];
#endif
-#ifdef DO_RGBA
GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4];
-#endif
-#ifdef DO_INDEX
- GLfloat iPlane[4];
-#endif
#if defined(DO_ATTRIBS)
GLfloat attrPlane[FRAG_ATTRIB_MAX][4][4];
GLfloat wPlane[4]; /* win[3] */
#endif
- GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceSign;
+ GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceCullSign;
(void) swrast;
majDx = vMax->attrib[FRAG_ATTRIB_WPOS][0] - vMin->attrib[FRAG_ATTRIB_WPOS][0];
majDy = vMax->attrib[FRAG_ATTRIB_WPOS][1] - vMin->attrib[FRAG_ATTRIB_WPOS][1];
+ /* front/back-face determination and cullling */
{
const GLfloat botDx = vMid->attrib[FRAG_ATTRIB_WPOS][0] - vMin->attrib[FRAG_ATTRIB_WPOS][0];
const GLfloat botDy = vMid->attrib[FRAG_ATTRIB_WPOS][1] - vMin->attrib[FRAG_ATTRIB_WPOS][1];
if (area * bf < 0 || area == 0 || IS_INF_OR_NAN(area))
return;
ltor = (GLboolean) (area < 0.0F);
+
+ span.facing = area * swrast->_BackfaceSign > 0.0F;
}
/* Plane equation setup:
compute_plane(p0, p1, p2, p0[2], p1[2], p2[2], zPlane);
span.arrayMask |= SPAN_Z;
#endif
-#ifdef DO_RGBA
if (ctx->Light.ShadeModel == GL_SMOOTH) {
compute_plane(p0, p1, p2, v0->color[RCOMP], v1->color[RCOMP], v2->color[RCOMP], rPlane);
compute_plane(p0, p1, p2, v0->color[GCOMP], v1->color[GCOMP], v2->color[GCOMP], gPlane);
constant_plane(v2->color[ACOMP], aPlane);
}
span.arrayMask |= SPAN_RGBA;
-#endif
-#ifdef DO_INDEX
- if (ctx->Light.ShadeModel == GL_SMOOTH) {
- compute_plane(p0, p1, p2, (GLfloat) v0->attrib[FRAG_ATTRIB_CI][0],
- v1->attrib[FRAG_ATTRIB_CI][0], v2->attrib[FRAG_ATTRIB_CI][0], iPlane);
- }
- else {
- constant_plane(v2->attrib[FRAG_ATTRIB_CI][0], iPlane);
- }
- span.arrayMask |= SPAN_INDEX;
-#endif
#if defined(DO_ATTRIBS)
{
const GLfloat invW0 = v0->attrib[FRAG_ATTRIB_WPOS][3];
#if defined(DO_ATTRIBS)
/* compute attributes at left-most fragment */
- span.attrStart[FRAG_ATTRIB_WPOS][3] = solve_plane(ix + 0.5, iy + 0.5, wPlane);
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = solve_plane(ix + 0.5F, iy + 0.5F, wPlane);
ATTRIB_LOOP_BEGIN
GLuint c;
for (c = 0; c < 4; c++) {
- span.attrStart[attr][c] = solve_plane(ix + 0.5, iy + 0.5, attrPlane[attr][c]);
+ span.attrStart[attr][c] = solve_plane(ix + 0.5F, iy + 0.5F, attrPlane[attr][c]);
}
ATTRIB_LOOP_END
#endif
/* (cx,cy) = center of fragment */
const GLfloat cx = ix + 0.5F, cy = iy + 0.5F;
SWspanarrays *array = span.array;
-#ifdef DO_INDEX
- array->coverage[count] = (GLfloat) compute_coveragei(pMin, pMid, pMax, ix, iy);
-#else
array->coverage[count] = coverage;
-#endif
#ifdef DO_Z
array->z[count] = (GLuint) solve_plane(cx, cy, zPlane);
#endif
-#ifdef DO_RGBA
array->rgba[count][RCOMP] = solve_plane_chan(cx, cy, rPlane);
array->rgba[count][GCOMP] = solve_plane_chan(cx, cy, gPlane);
array->rgba[count][BCOMP] = solve_plane_chan(cx, cy, bPlane);
array->rgba[count][ACOMP] = solve_plane_chan(cx, cy, aPlane);
-#endif
-#ifdef DO_INDEX
- array->index[count] = (GLint) solve_plane(cx, cy, iPlane);
-#endif
ix++;
count++;
coverage = compute_coveragef(pMin, pMid, pMax, ix, iy);
span.x = startX;
span.y = iy;
span.end = (GLuint) ix - (GLuint) startX;
-#if defined(DO_RGBA)
_swrast_write_rgba_span(ctx, &span);
-#else
- _swrast_write_index_span(ctx, &span);
-#endif
}
}
else {
}
/* skip fragments with zero coverage */
- while (startX >= 0) {
+ while (startX > 0) {
coverage = compute_coveragef(pMin, pMax, pMid, startX, iy);
if (coverage > 0.0F)
break;
/* (cx,cy) = center of fragment */
const GLfloat cx = ix + 0.5F, cy = iy + 0.5F;
SWspanarrays *array = span.array;
-#ifdef DO_INDEX
- array->coverage[ix] = (GLfloat) compute_coveragei(pMin, pMax, pMid, ix, iy);
-#else
+ ASSERT(ix >= 0);
array->coverage[ix] = coverage;
-#endif
#ifdef DO_Z
array->z[ix] = (GLuint) solve_plane(cx, cy, zPlane);
#endif
-#ifdef DO_RGBA
array->rgba[ix][RCOMP] = solve_plane_chan(cx, cy, rPlane);
array->rgba[ix][GCOMP] = solve_plane_chan(cx, cy, gPlane);
array->rgba[ix][BCOMP] = solve_plane_chan(cx, cy, bPlane);
array->rgba[ix][ACOMP] = solve_plane_chan(cx, cy, aPlane);
-#endif
-#ifdef DO_INDEX
- array->index[ix] = (GLint) solve_plane(cx, cy, iPlane);
-#endif
ix--;
count++;
coverage = compute_coveragef(pMin, pMax, pMid, ix, iy);
#if defined(DO_ATTRIBS)
/* compute attributes at left-most fragment */
- span.attrStart[FRAG_ATTRIB_WPOS][3] = solve_plane(ix + 1.5, iy + 0.5, wPlane);
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = solve_plane(ix + 1.5F, iy + 0.5F, wPlane);
ATTRIB_LOOP_BEGIN
GLuint c;
for (c = 0; c < 4; c++) {
- span.attrStart[attr][c] = solve_plane(ix + 1.5, iy + 0.5, attrPlane[attr][c]);
+ span.attrStart[attr][c] = solve_plane(ix + 1.5F, iy + 0.5F, attrPlane[attr][c]);
}
ATTRIB_LOOP_END
#endif
GLint j;
for (j = 0; j < (GLint) n; j++) {
array->coverage[j] = array->coverage[j + left];
-#ifdef DO_RGBA
COPY_CHAN4(array->rgba[j], array->rgba[j + left]);
-#endif
-#ifdef DO_INDEX
- array->index[j] = array->index[j + left];
-#endif
#ifdef DO_Z
array->z[j] = array->z[j + left];
#endif
span.x = left;
span.y = iy;
span.end = n;
-#if defined(DO_RGBA)
_swrast_write_rgba_span(ctx, &span);
-#else
- _swrast_write_index_span(ctx, &span);
-#endif
}
}
}
#undef DO_Z
-#undef DO_RGBA
-#undef DO_INDEX
#undef DO_ATTRIBS
#undef DO_OCCLUSION_TEST
projects / mesa.git / blobdiff