diff options
Diffstat (limited to 'src/mesa/swrast/s_span.c')
| -rw-r--r-- | src/mesa/swrast/s_span.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/mesa/swrast/s_span.c b/src/mesa/swrast/s_span.c index 4ab6e2e9fb..f23272c2be 100644 --- a/src/mesa/swrast/s_span.c +++ b/src/mesa/swrast/s_span.c @@ -171,10 +171,11 @@ interpolate_active_attribs(GLcontext *ctx, SWspan *span, GLbitfield attrMask) { const SWcontext *swrast = SWRAST_CONTEXT(ctx); - /* for glDraw/CopyPixels() we may have turned off some bits in - * the _ActiveAttribMask - be sure to obey that mask now. + /* + * Don't overwrite existing array values, such as colors that may have + * been produced by glDraw/CopyPixels. */ - attrMask &= swrast->_ActiveAttribMask; + attrMask &= ~span->arrayAttribs; ATTRIB_LOOP_BEGIN if (attrMask & (1 << attr)) { @@ -201,6 +202,7 @@ interpolate_active_attribs(GLcontext *ctx, SWspan *span, GLbitfield attrMask) v3 += dv3dx; w += dwdx; } + ASSERT((span->arrayAttribs & (1 << attr)) == 0); span->arrayAttribs |= (1 << attr); } ATTRIB_LOOP_END |