Simplify ctx->_NumColorDrawBuffers, _ColorDrawBuffers and fix bug 13835.

These fields are no longer indexed by shader output.  Now, we just have
a simple array of renderbuffer pointers.

If the shader writes to gl_FragData[i], send those colors to the N
_ColorDrawBuffers.  Otherwise, replicate the single gl_FragColor (or
the fixed-function color) to the N _ColorDrawBuffers.

A few more changes and simplifications can follow from this...

1 files changed, 5 insertions, 5 deletions

diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c
index 76c79eb0d81..2dfc033d501 100644
--- a/src/mesa/swrast/s_fragprog.c
+++ b/src/mesa/swrast/s_fragprog.c
@@ -167,11 +167,11 @@ run_program(GLcontext *ctx, SWspan *span, GLuint start, GLuint end)
                 * Note that colors beyond 0 and 1 will overwrite other
                 * attributes, such as FOGC, TEX0, TEX1, etc.  That's OK.
                 */
-               GLuint output;
-               for (output = 0; output < swrast->_NumColorOutputs; output++) {
-                  if (outputsWritten & (1 << (FRAG_RESULT_DATA0 + output))) {
-                     COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0+output][i],
-                             machine->Outputs[FRAG_RESULT_DATA0 + output]);
+               GLuint buf;
+               for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
+                  if (outputsWritten & (1 << (FRAG_RESULT_DATA0 + buf))) {
+                     COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0 + buf][i],
+                             machine->Outputs[FRAG_RESULT_DATA0 + buf]);
                   }
                }
             }