From 8ad1076dc2afda8ed37e5a9f6a757583eba90375 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Fri, 11 Oct 2002 17:41:03 +0000
Subject: Another round of glRead/DrawBuffer() clean-ups and simplifications.
 Replaced ctx->Color._DriverDrawBuffer with swrast->CurrentBuffer. Replaced
 ctx->Pixel._DriverReadBuffer with ctx->Pixel._ReadSrcMask.
 swrast->Driver.SetBuffer() takes FRONT/BACK_LEFT/RIGHT_BIT values now. Added
 tokens and code for GL_AUX buffers, for completeness.

---
 src/mesa/swrast/s_buffers.c | 33 ++++++++++-----------------------
 1 file changed, 10 insertions(+), 23 deletions(-)

(limited to 'src/mesa/swrast/s_buffers.c')

diff --git a/src/mesa/swrast/s_buffers.c b/src/mesa/swrast/s_buffers.c
index 1b07eb0bef..102d53ac7f 100644
--- a/src/mesa/swrast/s_buffers.c
+++ b/src/mesa/swrast/s_buffers.c
@@ -1,4 +1,4 @@
-/* $Id: s_buffers.c,v 1.13 2002/10/04 19:10:12 brianp Exp $ */
+/* $Id: s_buffers.c,v 1.14 2002/10/11 17:41:06 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -166,18 +166,7 @@ clear_color_buffers(GLcontext *ctx)
    /* loop over four possible dest color buffers */
    for (bufferBit = 1; bufferBit <= 8; bufferBit = bufferBit << 1) {
       if (bufferBit & ctx->Color._DrawDestMask) {
-         if (bufferBit == FRONT_LEFT_BIT) {
-            (*swrast->Driver.SetBuffer)(ctx, ctx->DrawBuffer, GL_FRONT_LEFT);
-         }
-         else if (bufferBit == FRONT_RIGHT_BIT) {
-            (*swrast->Driver.SetBuffer)(ctx, ctx->DrawBuffer, GL_FRONT_RIGHT);
-         }
-         else if (bufferBit == BACK_LEFT_BIT) {
-            (*swrast->Driver.SetBuffer)(ctx, ctx->DrawBuffer, GL_BACK_LEFT);
-         }
-         else {
-            (*swrast->Driver.SetBuffer)(ctx, ctx->DrawBuffer, GL_BACK_RIGHT);
-         }
+         (*swrast->Driver.SetBuffer)(ctx, ctx->DrawBuffer, bufferBit);
 
          if (colorMask != 0xffffffff) {
             clear_color_buffer_with_masking(ctx);
@@ -274,10 +263,9 @@ _swrast_use_read_buffer( GLcontext *ctx )
    SWcontext *swrast = SWRAST_CONTEXT(ctx);
 
    /* Do this so the software-emulated alpha plane span functions work! */
-   ctx->Color._DriverDrawBuffer = ctx->Pixel._DriverReadBuffer;
+   swrast->CurrentBuffer = ctx->Pixel._ReadSrcMask;
    /* Tell the device driver where to read/write spans */
-   (*swrast->Driver.SetBuffer)( ctx, ctx->ReadBuffer,
-                                ctx->Pixel._DriverReadBuffer );
+   (*swrast->Driver.SetBuffer)( ctx, ctx->ReadBuffer, swrast->CurrentBuffer );
 }
 
 
@@ -302,17 +290,16 @@ _swrast_use_draw_buffer( GLcontext *ctx )
     */
 
    if (ctx->Color._DrawDestMask & FRONT_LEFT_BIT)
-      ctx->Color._DriverDrawBuffer = GL_FRONT_LEFT;
+      swrast->CurrentBuffer = FRONT_LEFT_BIT;
    else if (ctx->Color._DrawDestMask & BACK_LEFT_BIT)
-      ctx->Color._DriverDrawBuffer = GL_BACK_LEFT;
+      swrast->CurrentBuffer = BACK_LEFT_BIT;
    else if (ctx->Color._DrawDestMask & FRONT_RIGHT_BIT)
-      ctx->Color._DriverDrawBuffer = GL_FRONT_RIGHT;
+      swrast->CurrentBuffer = FRONT_RIGHT_BIT;
    else if (ctx->Color._DrawDestMask & BACK_RIGHT_BIT)
-      ctx->Color._DriverDrawBuffer = GL_BACK_RIGHT;
+      swrast->CurrentBuffer = BACK_RIGHT_BIT;
    else
       /* glDrawBuffer(GL_NONE) */
-      ctx->Color._DriverDrawBuffer = GL_FRONT_LEFT; /* always have this */
+      swrast->CurrentBuffer = FRONT_LEFT_BIT; /* we always have this buffer */
 
-   (*swrast->Driver.SetBuffer)( ctx, ctx->DrawBuffer,
-                                ctx->Color._DriverDrawBuffer );
+   (*swrast->Driver.SetBuffer)( ctx, ctx->DrawBuffer, swrast->CurrentBuffer );
 }
-- 
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