mesa: implement per-buffer color masking

This is part of the GL_EXT_draw_buffers2 extension and part of GL 3.0.

The ctx->Color.ColorMask field is now a 2-D array.  Until drivers are
modified to support per-buffer color masking, they can just look at
the 0th color mask.

The new _mesa_ColorMaskIndexed() function will be called by
glColorMaskIndexedEXT() or glColorMaski().

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mesa/swrast/s_accum.c b/src/mesa/swrast/s_accum.c
index c6c7dbf5cf0..2d8c361e5d7 100644
--- a/src/mesa/swrast/s_accum.c
+++ b/src/mesa/swrast/s_accum.c
@@ -528,7 +528,7 @@ accum_return(GLcontext *ctx, GLfloat value,
          for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) {
             struct gl_renderbuffer *rb = fb->_ColorDrawBuffers[buffer];
             if (masking) {
-               _swrast_mask_rgba_span(ctx, rb, &span);
+               _swrast_mask_rgba_span(ctx, rb, &span, buffer);
             }
             rb->PutRow(ctx, rb, width, xpos, ypos + i, span.array->rgba, NULL);
          }