From 98848382731b71a51e4a80f1820f009e70f06a25 Mon Sep 17 00:00:00 2001
From: Brian <brian.paul@tungstengraphics.com>
Date: Sun, 9 Dec 2007 21:10:39 -0700
Subject: Fix looping for multi-color buffer writing.

---
 src/mesa/pipe/softpipe/sp_context.h        | 2 +-
 src/mesa/pipe/softpipe/sp_quad.c           | 2 +-
 src/mesa/pipe/softpipe/sp_quad_blend.c     | 6 ++++--
 src/mesa/pipe/softpipe/sp_quad_bufloop.c   | 4 +---
 src/mesa/pipe/softpipe/sp_quad_colormask.c | 3 ++-
 src/mesa/pipe/softpipe/sp_quad_output.c    | 3 ++-
 6 files changed, 11 insertions(+), 9 deletions(-)

(limited to 'src')

diff --git a/src/mesa/pipe/softpipe/sp_context.h b/src/mesa/pipe/softpipe/sp_context.h
index d4763a98c6..b97cdc52c6 100644
--- a/src/mesa/pipe/softpipe/sp_context.h
+++ b/src/mesa/pipe/softpipe/sp_context.h
@@ -154,7 +154,7 @@ struct softpipe_context {
    struct draw_stage *setup;
    struct draw_stage *vbuf;
 
-   struct pipe_surface *cbuf;      /**< current color buffer (one of cbufs) */
+   uint current_cbuf;      /**< current color buffer being written to */
 
    struct softpipe_tile_cache *cbuf_cache[PIPE_MAX_COLOR_BUFS];
    struct softpipe_tile_cache *zbuf_cache;
diff --git a/src/mesa/pipe/softpipe/sp_quad.c b/src/mesa/pipe/softpipe/sp_quad.c
index e0327c4cf9..6330465a8b 100644
--- a/src/mesa/pipe/softpipe/sp_quad.c
+++ b/src/mesa/pipe/softpipe/sp_quad.c
@@ -77,7 +77,7 @@ sp_build_quad_pipeline(struct softpipe_context *sp)
 
    if (sp->framebuffer.num_cbufs == 1) {
       /* the usual case: write to exactly one colorbuf */
-      sp->cbuf = sp->framebuffer.cbufs[0];
+      sp->current_cbuf = 0;
    }
    else {
       /* insert bufloop stage */
diff --git a/src/mesa/pipe/softpipe/sp_quad_blend.c b/src/mesa/pipe/softpipe/sp_quad_blend.c
index 696e252af1..76a0873fc5 100644
--- a/src/mesa/pipe/softpipe/sp_quad_blend.c
+++ b/src/mesa/pipe/softpipe/sp_quad_blend.c
@@ -107,7 +107,8 @@ logicop_quad(struct quad_stage *qs, struct quad_header *quad)
    uint *dst4 = (uint *) dst;
    uint *res4 = (uint *) res;
    struct softpipe_cached_tile *
-      tile = sp_get_cached_tile(softpipe, softpipe->cbuf_cache[0],
+      tile = sp_get_cached_tile(softpipe,
+                                softpipe->cbuf_cache[softpipe->current_cbuf],
                                 quad->x0, quad->y0);
    uint i, j;
 
@@ -224,7 +225,8 @@ blend_quad(struct quad_stage *qs, struct quad_header *quad)
    static const float one[4] = { 1, 1, 1, 1 };
    float source[4][QUAD_SIZE], dest[4][QUAD_SIZE];
    struct softpipe_cached_tile *tile
-      = sp_get_cached_tile(softpipe, softpipe->cbuf_cache[0],
+      = sp_get_cached_tile(softpipe,
+                           softpipe->cbuf_cache[softpipe->current_cbuf],
                            quad->x0, quad->y0);
    uint i, j;
 
diff --git a/src/mesa/pipe/softpipe/sp_quad_bufloop.c b/src/mesa/pipe/softpipe/sp_quad_bufloop.c
index aac70e2b04..e704b4043c 100644
--- a/src/mesa/pipe/softpipe/sp_quad_bufloop.c
+++ b/src/mesa/pipe/softpipe/sp_quad_bufloop.c
@@ -30,7 +30,7 @@ cbuf_loop_quad(struct quad_stage *qs, struct quad_header *quad)
 
    for (i = 0; i < softpipe->framebuffer.num_cbufs; i++) {
       /* set current cbuffer */
-      softpipe->cbuf = softpipe->framebuffer.cbufs[i];
+      softpipe->current_cbuf = i;
 
       /* pass blended quad to next stage */
       qs->next->run(qs->next, quad);
@@ -38,8 +38,6 @@ cbuf_loop_quad(struct quad_stage *qs, struct quad_header *quad)
       /* restore quad's colors for next buffer */
       memcpy(quad->outputs.color, tmp, sizeof(tmp));
    }
-
-   softpipe->cbuf = NULL; /* prevent accidental use */
 }
 
 
diff --git a/src/mesa/pipe/softpipe/sp_quad_colormask.c b/src/mesa/pipe/softpipe/sp_quad_colormask.c
index c585aa3edd..f5e0a32d1b 100644
--- a/src/mesa/pipe/softpipe/sp_quad_colormask.c
+++ b/src/mesa/pipe/softpipe/sp_quad_colormask.c
@@ -50,7 +50,8 @@ colormask_quad(struct quad_stage *qs, struct quad_header *quad)
    float dest[4][QUAD_SIZE];
    struct softpipe_cached_tile *tile
       = sp_get_cached_tile(softpipe,
-                           softpipe->cbuf_cache[0], quad->x0, quad->y0);
+                           softpipe->cbuf_cache[softpipe->current_cbuf],
+                           quad->x0, quad->y0);
    uint i, j;
 
    /* get/swizzle dest colors */
diff --git a/src/mesa/pipe/softpipe/sp_quad_output.c b/src/mesa/pipe/softpipe/sp_quad_output.c
index cebfec18f7..f04a550e3d 100644
--- a/src/mesa/pipe/softpipe/sp_quad_output.c
+++ b/src/mesa/pipe/softpipe/sp_quad_output.c
@@ -43,7 +43,8 @@ output_quad(struct quad_stage *qs, struct quad_header *quad)
 {
    struct softpipe_context *softpipe = qs->softpipe;
    struct softpipe_cached_tile *tile
-      = sp_get_cached_tile(softpipe, softpipe->cbuf_cache[0],
+      = sp_get_cached_tile(softpipe,
+                           softpipe->cbuf_cache[softpipe->current_cbuf],
                            quad->x0, quad->y0);
    /* in-tile pos: */
    const int itx = quad->x0 % TILE_SIZE;
-- 
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