diff options
| -rw-r--r-- | src/mesa/swrast/s_span.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/mesa/swrast/s_span.c b/src/mesa/swrast/s_span.c index 15a783b236..08d725c5eb 100644 --- a/src/mesa/swrast/s_span.c +++ b/src/mesa/swrast/s_span.c @@ -1403,11 +1403,17 @@ _swrast_write_rgba_span( GLcontext *ctx, SWspan *span) } /* - * Write to renderbuffers + * Write to renderbuffers. + * Depending on glDrawBuffer() state and the which color outputs are + * written by the fragment shader, we may either replicate one color to + * all renderbuffers or write a different color to each renderbuffer. + * multiFragOutputs=TRUE for the later case. */ { const GLuint numBuffers = fb->_NumColorDrawBuffers; - const GLboolean multiFragOutputs = numBuffers > 1; + const struct gl_fragment_program *fp = ctx->FragmentProgram._Current; + const GLboolean multiFragOutputs = + (fp && fp->Base.OutputsWritten >= (1 << FRAG_RESULT_DATA0)); GLuint buf; for (buf = 0; buf < numBuffers; buf++) { |