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, 2 insertions, 2 deletions

diff --git a/src/mesa/swrast/s_accum.c b/src/mesa/swrast/s_accum.c
index 3c45dee399..b74f794d09 100644
--- a/src/mesa/swrast/s_accum.c
+++ b/src/mesa/swrast/s_accum.c
@@ -525,8 +525,8 @@ accum_return(GLcontext *ctx, GLfloat value,
          }
 
          /* store colors */
-         for (buffer = 0; buffer < fb->_NumColorDrawBuffers[0]; buffer++) {
-            struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[0][buffer];
+         for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) {
+            struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buffer];
             if (masking) {
                _swrast_mask_rgba_span(ctx, rb, &span);
             }