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...

2 files changed, 3 insertions, 3 deletions

diff --git a/src/mesa/drivers/dri/r200/r200_pixel.c b/src/mesa/drivers/dri/r200/r200_pixel.c
index 2f5aab0744b..db8ceeabe03 100644
--- a/src/mesa/drivers/dri/r200/r200_pixel.c
+++ b/src/mesa/drivers/dri/r200/r200_pixel.c
@@ -294,7 +294,7 @@ static void do_draw_pix( GLcontext *ctx,
    r200ContextPtr rmesa = R200_CONTEXT(ctx);
    __DRIdrawablePrivate *dPriv = rmesa->dri.drawable;
    drm_clip_rect_t *box = dPriv->pClipRects;
-   struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorDrawBuffers[0][0];
+   struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorDrawBuffers[0];
    driRenderbuffer *drb = (driRenderbuffer *) rb;
    int nbox = dPriv->numClipRects;
    int i;
@@ -388,7 +388,7 @@ r200TryDrawPixels( GLcontext *ctx,
       fprintf(stderr, "%s\n", __FUNCTION__);
 
    /* check that we're drawing to exactly one color buffer */
-   if (ctx->DrawBuffer->_NumColorDrawBuffers[0] != 1)
+   if (ctx->DrawBuffer->_NumColorDrawBuffers != 1)
      return GL_FALSE;
 
    switch (format) {
diff --git a/src/mesa/drivers/dri/r200/r200_span.c b/src/mesa/drivers/dri/r200/r200_span.c
index fe427bdcdec..ff2eb011225 100644
--- a/src/mesa/drivers/dri/r200/r200_span.c
+++ b/src/mesa/drivers/dri/r200/r200_span.c
@@ -255,7 +255,7 @@ static void r200SpanRenderStart( GLcontext *ctx )
    {
       int p;
       driRenderbuffer *drb =
-	 (driRenderbuffer *) ctx->WinSysDrawBuffer->_ColorDrawBuffers[0][0];
+	 (driRenderbuffer *) ctx->WinSysDrawBuffer->_ColorDrawBuffers[0];
       volatile int *buf =
 	 (volatile int *)(rmesa->dri.screen->pFB + drb->offset);
       p = *buf;