Replace gl_framebuffer's _ColorDrawBufferMask with _ColorDrawBufferIndexes

Each array element is now a BUFFER_x token rather than a BUFFER_BIT_x bitmask.
The number of active color buffers is specified by _NumColorDrawBuffers.
This builds on the previous DrawBuffer changes and will help with drivers
implementing GL_ARB_draw_buffers.

2 files changed, 10 insertions, 8 deletions

diff --git a/src/mesa/drivers/dri/mach64/mach64_lock.c b/src/mesa/drivers/dri/mach64/mach64_lock.c
index b73e350111..13e212b81d 100644
--- a/src/mesa/drivers/dri/mach64/mach64_lock.c
+++ b/src/mesa/drivers/dri/mach64/mach64_lock.c
@@ -70,7 +70,7 @@ void mach64GetLock( mach64ContextPtr mmesa, GLuint flags )
 
    if ( mmesa->lastStamp != dPriv->lastStamp ) {
       mmesa->lastStamp = dPriv->lastStamp;
-      if (mmesa->glCtx->DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_BACK_LEFT)
+      if (mmesa->glCtx->DrawBuffer->_ColorDrawBufferIndexes[0] == BUFFER_BACK_LEFT)
          mach64SetCliprects( mmesa->glCtx, GL_BACK_LEFT );
       else
          mach64SetCliprects( mmesa->glCtx, GL_FRONT_LEFT );
diff --git a/src/mesa/drivers/dri/mach64/mach64_state.c b/src/mesa/drivers/dri/mach64/mach64_state.c
index 667a394520..10a5b40ba1 100644
--- a/src/mesa/drivers/dri/mach64/mach64_state.c
+++ b/src/mesa/drivers/dri/mach64/mach64_state.c
@@ -726,24 +726,26 @@ static void mach64DDDrawBuffer( GLcontext *ctx, GLenum mode )
 
    FLUSH_BATCH( mmesa );
 
-   /*
-    * _DrawDestMask is easier to cope with than <mode>.
-    */
-   switch ( ctx->DrawBuffer->_ColorDrawBufferMask[0] ) {
-   case BUFFER_BIT_FRONT_LEFT:
+   if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) {
+      /* GL_NONE or GL_FRONT_AND_BACK or stereo left&right, etc */
+      FALLBACK( mmesa, MACH64_FALLBACK_DRAW_BUFFER, GL_TRUE );
+      return;
+   }
+
+   switch ( ctx->DrawBuffer->_ColorDrawBufferIndexes[0] ) {
+   case BUFFER_FRONT_LEFT:
       FALLBACK( mmesa, MACH64_FALLBACK_DRAW_BUFFER, GL_FALSE );
       mach64SetCliprects( ctx, GL_FRONT_LEFT );
       if (MACH64_DEBUG & DEBUG_VERBOSE_MSG)
 	 fprintf(stderr,"%s: BUFFER_BIT_FRONT_LEFT\n", __FUNCTION__);
       break;
-   case BUFFER_BIT_BACK_LEFT:
+   case BUFFER_BACK_LEFT:
       FALLBACK( mmesa, MACH64_FALLBACK_DRAW_BUFFER, GL_FALSE );
       mach64SetCliprects( ctx, GL_BACK_LEFT );
       if (MACH64_DEBUG & DEBUG_VERBOSE_MSG)
 	 fprintf(stderr,"%s: BUFFER_BIT_BACK_LEFT\n", __FUNCTION__);
       break;
    default:
-      /* GL_NONE or GL_FRONT_AND_BACK or stereo left&right, etc */
       FALLBACK( mmesa, MACH64_FALLBACK_DRAW_BUFFER, GL_TRUE );
       if (MACH64_DEBUG & DEBUG_VERBOSE_MSG)
 	 fprintf(stderr,"%s: fallback (mode=%d)\n", __FUNCTION__, mode);