From 555f0a88182e2b1af809b2d97abdac02814a2f28 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Sat, 28 Feb 2009 12:21:18 -0700
Subject: [PATCH] mesa: remove unused AUX buffers

Remove all references to aux buffers 1..3.  Keep AUX0 around for now just
in case, but it'll probably go too someday.  I don't know of any OpenGL
drivers since the IRIX days that support aux color buffers.
---
 src/mesa/drivers/dri/intel/intel_clear.c |  5 +----
 src/mesa/drivers/x11/xm_api.c            |  3 ---
 src/mesa/main/buffers.c                  | 12 ------------
 src/mesa/main/config.h                   |  2 +-
 src/mesa/main/mtypes.h                   | 10 ++--------
 src/mesa/swrast/s_buffers.c              |  5 +----
 6 files changed, 5 insertions(+), 32 deletions(-)

diff --git a/src/mesa/drivers/dri/intel/intel_clear.c b/src/mesa/drivers/dri/intel/intel_clear.c
index c3ba50f3550..28281b38615 100644
--- a/src/mesa/drivers/dri/intel/intel_clear.c
+++ b/src/mesa/drivers/dri/intel/intel_clear.c
@@ -247,13 +247,10 @@ static const char *buffer_names[] = {
    [BUFFER_BACK_LEFT] = "back",
    [BUFFER_FRONT_RIGHT] = "front right",
    [BUFFER_BACK_RIGHT] = "back right",
-   [BUFFER_AUX0] = "aux0",
-   [BUFFER_AUX1] = "aux1",
-   [BUFFER_AUX2] = "aux2",
-   [BUFFER_AUX3] = "aux3",
    [BUFFER_DEPTH] = "depth",
    [BUFFER_STENCIL] = "stencil",
    [BUFFER_ACCUM] = "accum",
+   [BUFFER_AUX0] = "aux0",
    [BUFFER_COLOR0] = "color0",
    [BUFFER_COLOR1] = "color1",
    [BUFFER_COLOR2] = "color2",
diff --git a/src/mesa/drivers/x11/xm_api.c b/src/mesa/drivers/x11/xm_api.c
index 62d30a69878..908fecc85a1 100644
--- a/src/mesa/drivers/x11/xm_api.c
+++ b/src/mesa/drivers/x11/xm_api.c
@@ -2410,11 +2410,8 @@ xbuffer_to_renderbuffer(int buffer)
    case GLX_AUX0_EXT:
       return BUFFER_AUX0;
    case GLX_AUX1_EXT:
-      return BUFFER_AUX1;
    case GLX_AUX2_EXT:
-      return BUFFER_AUX2;
    case GLX_AUX3_EXT:
-      return BUFFER_AUX3;
    case GLX_AUX4_EXT:
    case GLX_AUX5_EXT:
    case GLX_AUX6_EXT:
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c
index 85db3868c49..1580487ffd6 100644
--- a/src/mesa/main/buffers.c
+++ b/src/mesa/main/buffers.c
@@ -119,12 +119,6 @@ draw_buffer_enum_to_bitmask(GLenum buffer)
          return BUFFER_BIT_FRONT_LEFT;
       case GL_AUX0:
          return BUFFER_BIT_AUX0;
-      case GL_AUX1:
-         return BUFFER_BIT_AUX1;
-      case GL_AUX2:
-         return BUFFER_BIT_AUX2;
-      case GL_AUX3:
-         return BUFFER_BIT_AUX3;
       case GL_COLOR_ATTACHMENT0_EXT:
          return BUFFER_BIT_COLOR0;
       case GL_COLOR_ATTACHMENT1_EXT:
@@ -176,12 +170,6 @@ read_buffer_enum_to_index(GLenum buffer)
          return BUFFER_FRONT_LEFT;
       case GL_AUX0:
          return BUFFER_AUX0;
-      case GL_AUX1:
-         return BUFFER_AUX1;
-      case GL_AUX2:
-         return BUFFER_AUX2;
-      case GL_AUX3:
-         return BUFFER_AUX3;
       case GL_COLOR_ATTACHMENT0_EXT:
          return BUFFER_COLOR0;
       case GL_COLOR_ATTACHMENT1_EXT:
diff --git a/src/mesa/main/config.h b/src/mesa/main/config.h
index bb3e980bfaa..282ad9514c2 100644
--- a/src/mesa/main/config.h
+++ b/src/mesa/main/config.h
@@ -68,7 +68,7 @@
 #define MAX_PIXEL_MAP_TABLE 256
 
 /** Maximum number of auxillary color buffers */
-#define MAX_AUX_BUFFERS 4
+#define MAX_AUX_BUFFERS 1
 
 /** Maximum order (degree) of curves */
 #ifdef AMIGA
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index f17b9e1e717..9ee341582c9 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -285,14 +285,11 @@ typedef enum
    BUFFER_BACK_LEFT,
    BUFFER_FRONT_RIGHT,
    BUFFER_BACK_RIGHT,
-   /* optional aux buffers */
-   BUFFER_AUX0,
-   BUFFER_AUX1,
-   BUFFER_AUX2,
-   BUFFER_AUX3,
    BUFFER_DEPTH,
    BUFFER_STENCIL,
    BUFFER_ACCUM,
+   /* optional aux buffer */
+   BUFFER_AUX0,
    /* generic renderbuffers */
    BUFFER_COLOR0,
    BUFFER_COLOR1,
@@ -336,9 +333,6 @@ typedef enum
                             BUFFER_BIT_FRONT_RIGHT | \
                             BUFFER_BIT_BACK_RIGHT | \
                             BUFFER_BIT_AUX0 | \
-                            BUFFER_BIT_AUX1 | \
-                            BUFFER_BIT_AUX2 | \
-                            BUFFER_BIT_AUX3 | \
                             BUFFER_BIT_COLOR0 | \
                             BUFFER_BIT_COLOR1 | \
                             BUFFER_BIT_COLOR2 | \
diff --git a/src/mesa/swrast/s_buffers.c b/src/mesa/swrast/s_buffers.c
index af475ad8cb5..34ae1b4fccf 100644
--- a/src/mesa/swrast/s_buffers.c
+++ b/src/mesa/swrast/s_buffers.c
@@ -317,10 +317,7 @@ _swrast_Clear(GLcontext *ctx, GLbitfield buffers)
 	 BUFFER_BIT_DEPTH |
 	 BUFFER_BIT_STENCIL |
 	 BUFFER_BIT_ACCUM |
-         BUFFER_BIT_AUX0 |
-         BUFFER_BIT_AUX1 |
-         BUFFER_BIT_AUX2 |
-         BUFFER_BIT_AUX3;
+         BUFFER_BIT_AUX0;
       assert((buffers & (~legalBits)) == 0);
    }
 #endif
-- 
2.30.2