Lines Matching defs:span
89 * \return 0 if all pixels in the span failed the alpha test,
93 _swrast_alpha_test(const struct gl_context *ctx, SWspan *span)
95 const GLuint n = span->end;
96 GLubyte *mask = span->array->mask;
107 span->writeAll = GL_FALSE;
111 if (span->arrayMask & SPAN_RGBA) {
113 if (span->array->ChanType == GL_UNSIGNED_BYTE) {
114 GLubyte (*rgba)[4] = span->array->rgba8;
119 else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
120 GLushort (*rgba)[4] = span->array->rgba16;
126 GLfloat (*rgba)[4] = span->array->attribs[FRAG_ATTRIB_COL0];
133 ASSERT(span->interpMask & SPAN_RGBA);
134 if (span->array->ChanType == GL_UNSIGNED_BYTE) {
135 const GLfixed alphaStep = span->alphaStep;
136 GLfixed alpha = span->alpha;
141 else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
142 const GLfixed alphaStep = span->alphaStep;
143 GLfixed alpha = span->alpha;
149 const GLfloat alphaStep = FixedToFloat(span->alphaStep);
150 GLfloat alpha = FixedToFloat(span->alpha);
156 span->writeAll = GL_FALSE;