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swrast: add minor comments

This commit is contained in:
Brian Paul 2009-02-04 10:45:04 -07:00
parent 79e3441f66
commit 8962bac0a1
1 changed files with 4 additions and 0 deletions
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4
src/mesa/swrast/s_span.c
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@ -1311,6 +1311,7 @@ _swrast_write_rgba_span( GLcontext *ctx, SWspan *span)
/* Do the alpha test */
if (ctx->Color.AlphaEnabled) {
if (!_swrast_alpha_test(ctx, span)) {
/* all fragments failed test */
goto end;
}
}
@ -1323,6 +1324,7 @@ _swrast_write_rgba_span( GLcontext *ctx, SWspan *span)
if (ctx->Stencil.Enabled && fb->Visual.stencilBits > 0) {
/* Combined Z/stencil tests */
if (!_swrast_stencil_and_ztest_span(ctx, span)) {
/* all fragments failed test */
goto end;
}
}
@ -1331,6 +1333,7 @@ _swrast_write_rgba_span( GLcontext *ctx, SWspan *span)
ASSERT(ctx->Depth.Test);
ASSERT(span->arrayMask & SPAN_Z);
if (!_swrast_depth_test_span(ctx, span)) {
/* all fragments failed test */
goto end;
}
}
@ -1350,6 +1353,7 @@ _swrast_write_rgba_span( GLcontext *ctx, SWspan *span)
* the occlusion test.
*/
if (colorMask == 0x0) {
/* no colors to write */
goto end;
}