Merge git://proxy01.pd.intel.com:9419/git/mesa/mesa into crestline

13 files changed, 228 insertions, 305 deletions

diff --git a/src/mesa/drivers/dri/r300/radeon_context.c b/src/mesa/drivers/dri/r300/radeon_context.c
index 66d1b153b3c..22f943ebf38 100644
--- a/src/mesa/drivers/dri/r300/radeon_context.c
+++ b/src/mesa/drivers/dri/r300/radeon_context.c
@@ -70,7 +70,10 @@ static const GLubyte *radeonGetString(GLcontext * ctx, GLenum name)
 
 	switch (name) {
 	case GL_VENDOR:
-		return (GLubyte *) "Tungsten Graphics, Inc.";
+		if (IS_R300_CLASS(radeon->radeonScreen))
+			return (GLubyte *) "DRI R300 Project";
+		else
+			return (GLubyte *) "Tungsten Graphics, Inc.";
 
 	case GL_RENDERER:
 	{
diff --git a/src/mesa/drivers/x11/xm_api.c b/src/mesa/drivers/x11/xm_api.c
index cbbbd56efd5..b513dc8d40a 100644
--- a/src/mesa/drivers/x11/xm_api.c
+++ b/src/mesa/drivers/x11/xm_api.c
@@ -1842,16 +1842,18 @@ XMesaDestroyBuffer(XMesaBuffer b)
  *  1. the first time a buffer is bound to a context.
  *  2. from glViewport to poll for window size changes
  *  3. from the XMesaResizeBuffers() API function.
+ * Note: it's possible (and legal) for xmctx to be NULL.  That can happen
+ * when resizing a buffer when no rendering context is bound.
  */
 void
 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
 {
    GLuint width, height;
-   xmesa_get_window_size(xmctx->display, drawBuffer, &width, &height);
+   xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
    if (drawBuffer->mesa_buffer.Width != width ||
        drawBuffer->mesa_buffer.Height != height) {
-      _mesa_resize_framebuffer(&(xmctx->mesa),
-                               &(drawBuffer->mesa_buffer), width, height);
+      GLcontext *ctx = xmctx ? &xmctx->mesa : NULL;
+      _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
    }
    drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
 }
@@ -2175,7 +2177,7 @@ void XMesaSwapBuffers( XMesaBuffer b )
       }
 #endif
      if (b->backxrb->ximage) {
-	 /* Copy Ximage from host's memory to server's window */
+	 /* Copy Ximage (back buf) from client memory to server window */
 #if defined(USE_XSHM) && !defined(XFree86Server)
 	 if (b->shm) {
             /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
@@ -2197,8 +2199,8 @@ void XMesaSwapBuffers( XMesaBuffer b )
             /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
          }
       }
-      else {
-	 /* Copy pixmap to window on server */
+      else if (b->backxrb->pixmap) {
+	 /* Copy pixmap (back buf) to window (front buf) on server */
          /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
 	 XMesaCopyArea( b->xm_visual->display,
 			b->backxrb->pixmap,   /* source drawable */
@@ -2499,6 +2501,8 @@ XMesaResizeBuffers( XMesaBuffer b )
 {
    GET_CURRENT_CONTEXT(ctx);
    XMesaContext xmctx = XMESA_CONTEXT(ctx);
+   if (!xmctx)
+      return;
    xmesa_check_and_update_buffer_size(xmctx, b);
 }
 
diff --git a/src/mesa/drivers/x11/xm_buffer.c b/src/mesa/drivers/x11/xm_buffer.c
index 73c46b1fe60..c1fa23328f0 100644
--- a/src/mesa/drivers/x11/xm_buffer.c
+++ b/src/mesa/drivers/x11/xm_buffer.c
@@ -168,9 +168,6 @@ alloc_back_shm_ximage(XMesaBuffer b, GLuint width, GLuint height)
 static void
 alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height)
 {
-   if (width == 0 || height == 0)
-      return;
-
    if (b->db_mode == BACK_XIMAGE) {
       /* Deallocate the old backxrb->ximage, if any */
       if (b->backxrb->ximage) {
@@ -186,6 +183,9 @@ alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height)
 	 b->backxrb->ximage = NULL;
       }
 
+      if (width == 0 || height == 0)
+         return;
+
       /* Allocate new back buffer */
 #ifdef XFree86Server
       /* Allocate a regular XImage for the back buffer. */
@@ -218,20 +218,20 @@ alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height)
       b->backxrb->pixmap = None;
    }
    else if (b->db_mode == BACK_PIXMAP) {
-      if (!width)
-         width = 1;
-      if (!height)
-         height = 1;
-
       /* Free the old back pixmap */
       if (b->backxrb->pixmap) {
-	 XMesaFreePixmap(b->xm_visual->display, b->backxrb->pixmap);
+         XMesaFreePixmap(b->xm_visual->display, b->backxrb->pixmap);
+         b->backxrb->pixmap = 0;
       }
-      /* Allocate new back pixmap */
-      b->backxrb->pixmap = XMesaCreatePixmap(b->xm_visual->display,
-                                             b->frontxrb->drawable,
-                                             width, height,
-                                             GET_VISUAL_DEPTH(b->xm_visual));
+
+      if (width > 0 && height > 0) {
+         /* Allocate new back pixmap */
+         b->backxrb->pixmap = XMesaCreatePixmap(b->xm_visual->display,
+                                                b->frontxrb->drawable,
+                                                width, height,
+                                                GET_VISUAL_DEPTH(b->xm_visual));
+      }
+
       b->backxrb->ximage = NULL;
    }
 }
@@ -250,6 +250,7 @@ xmesa_delete_renderbuffer(struct gl_renderbuffer *rb)
 
 /**
  * Reallocate renderbuffer storage for front color buffer.
+ * Called via gl_renderbuffer::AllocStorage()
  */
 static GLboolean
 xmesa_alloc_front_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
@@ -260,6 +261,7 @@ xmesa_alloc_front_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
    /* just clear these to be sure we don't accidentally use them */
    xrb->origin1 = NULL;
    xrb->origin2 = NULL;
+   xrb->origin3 = NULL;
    xrb->origin4 = NULL;
 
    /* for the FLIP macro: */
@@ -275,6 +277,7 @@ xmesa_alloc_front_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
 
 /**
  * Reallocate renderbuffer storage for back color buffer.
+ * Called via gl_renderbuffer::AllocStorage()
  */
 static GLboolean
 xmesa_alloc_back_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
@@ -309,8 +312,12 @@ xmesa_alloc_back_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
       xrb->origin4 = (GLuint *) xrb->ximage->data + xrb->width4 * (height - 1);
    }
    else {
-      /* this assertion will fail if we happend to run out of memory */
-      /*assert(xrb->pixmap);*/
+      /* out of memory or buffer size is 0 x 0 */
+      xrb->width1 = xrb->width2 = xrb->width3 = xrb->width4 = 0;
+      xrb->origin1 = NULL;
+      xrb->origin2 = NULL;
+      xrb->origin3 = NULL;
+      xrb->origin4 = NULL;
    }
 
    return GL_TRUE;
diff --git a/src/mesa/main/attrib.c b/src/mesa/main/attrib.c
index 2b1a35f3de3..0df8d230500 100644
--- a/src/mesa/main/attrib.c
+++ b/src/mesa/main/attrib.c
@@ -138,9 +138,9 @@ _mesa_PushAttrib(GLbitfield mask)
       attr->Blend = ctx->Color.BlendEnabled;
       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
-      attr->ColorTable = ctx->Pixel.ColorTableEnabled;
-      attr->PostColorMatrixColorTable = ctx->Pixel.PostColorMatrixColorTableEnabled;
-      attr->PostConvolutionColorTable = ctx->Pixel.PostConvolutionColorTableEnabled;
+      for (i = 0; i < COLORTABLE_MAX; i++) {
+         attr->ColorTable[i] = ctx->Pixel.ColorTableEnabled[i];
+      }
       attr->Convolution1D = ctx->Pixel.Convolution1DEnabled;
       attr->Convolution2D = ctx->Pixel.Convolution2DEnabled;
       attr->Separable2D = ctx->Pixel.Separable2DEnabled;
@@ -432,14 +432,15 @@ pop_enable_group(GLcontext *ctx, const struct gl_enable_attrib *enable)
 
    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
                    GL_COLOR_MATERIAL);
-   TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled, enable->ColorTable,
+   TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION],
+                   enable->ColorTable[COLORTABLE_PRECONVOLUTION],
                    GL_COLOR_TABLE);
-   TEST_AND_UPDATE(ctx->Pixel.PostColorMatrixColorTableEnabled,
-                   enable->PostColorMatrixColorTable,
-                   GL_POST_COLOR_MATRIX_COLOR_TABLE);
-   TEST_AND_UPDATE(ctx->Pixel.PostConvolutionColorTableEnabled,
-                   enable->PostConvolutionColorTable,
+   TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION],
+                   enable->ColorTable[COLORTABLE_POSTCONVOLUTION],
                    GL_POST_CONVOLUTION_COLOR_TABLE);
+   TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX],
+                   enable->ColorTable[COLORTABLE_POSTCOLORMATRIX],
+                   GL_POST_COLOR_MATRIX_COLOR_TABLE);
    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
diff --git a/src/mesa/main/colortab.c b/src/mesa/main/colortab.c
index 9fb0baf4a7c..d8c4136f49e 100644
--- a/src/mesa/main/colortab.c
+++ b/src/mesa/main/colortab.c
@@ -291,15 +291,17 @@ _mesa_ColorTable( GLenum target, GLenum internalFormat,
                   GLsizei width, GLenum format, GLenum type,
                   const GLvoid *data )
 {
+   static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
+   static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
    GET_CURRENT_CONTEXT(ctx);
    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
    struct gl_texture_object *texObj = NULL;
    struct gl_color_table *table = NULL;
    GLboolean proxy = GL_FALSE;
    GLint baseFormat;
-   GLfloat rScale = 1.0, gScale = 1.0, bScale = 1.0, aScale = 1.0;
-   GLfloat rBias  = 0.0, gBias  = 0.0, bBias  = 0.0, aBias  = 0.0;
+   const GLfloat *scale = one, *bias = zero;
    GLint comps;
+
    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex */
 
    switch (target) {
@@ -350,18 +352,12 @@ _mesa_ColorTable( GLenum target, GLenum internalFormat,
          table = &ctx->Texture.Palette;
          break;
       case GL_COLOR_TABLE:
-         table = &ctx->ColorTable;
-         rScale = ctx->Pixel.ColorTableScale[0];
-         gScale = ctx->Pixel.ColorTableScale[1];
-         bScale = ctx->Pixel.ColorTableScale[2];
-         aScale = ctx->Pixel.ColorTableScale[3];
-         rBias = ctx->Pixel.ColorTableBias[0];
-         gBias = ctx->Pixel.ColorTableBias[1];
-         bBias = ctx->Pixel.ColorTableBias[2];
-         aBias = ctx->Pixel.ColorTableBias[3];
+         table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
+         scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
+         bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
          break;
       case GL_PROXY_COLOR_TABLE:
-         table = &ctx->ProxyColorTable;
+         table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
          proxy = GL_TRUE;
          break;
       case GL_TEXTURE_COLOR_TABLE_SGI:
@@ -370,14 +366,8 @@ _mesa_ColorTable( GLenum target, GLenum internalFormat,
             return;
          }
          table = &(texUnit->ColorTable);
-         rScale = ctx->Pixel.TextureColorTableScale[0];
-         gScale = ctx->Pixel.TextureColorTableScale[1];
-         bScale = ctx->Pixel.TextureColorTableScale[2];
-         aScale = ctx->Pixel.TextureColorTableScale[3];
-         rBias = ctx->Pixel.TextureColorTableBias[0];
-         gBias = ctx->Pixel.TextureColorTableBias[1];
-         bBias = ctx->Pixel.TextureColorTableBias[2];
-         aBias = ctx->Pixel.TextureColorTableBias[3];
+         scale = ctx->Pixel.TextureColorTableScale;
+         bias = ctx->Pixel.TextureColorTableBias;
          break;
       case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
          if (!ctx->Extensions.SGI_texture_color_table) {
@@ -388,33 +378,21 @@ _mesa_ColorTable( GLenum target, GLenum internalFormat,
          proxy = GL_TRUE;
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE:
-         table = &ctx->PostConvolutionColorTable;
-         rScale = ctx->Pixel.PCCTscale[0];
-         gScale = ctx->Pixel.PCCTscale[1];
-         bScale = ctx->Pixel.PCCTscale[2];
-         aScale = ctx->Pixel.PCCTscale[3];
-         rBias = ctx->Pixel.PCCTbias[0];
-         gBias = ctx->Pixel.PCCTbias[1];
-         bBias = ctx->Pixel.PCCTbias[2];
-         aBias = ctx->Pixel.PCCTbias[3];
+         table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
+         scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
+         bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
          break;
       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
-         table = &ctx->ProxyPostConvolutionColorTable;
+         table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
          proxy = GL_TRUE;
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
-         table = &ctx->PostColorMatrixColorTable;
-         rScale = ctx->Pixel.PCMCTscale[0];
-         gScale = ctx->Pixel.PCMCTscale[1];
-         bScale = ctx->Pixel.PCMCTscale[2];
-         aScale = ctx->Pixel.PCMCTscale[3];
-         rBias = ctx->Pixel.PCMCTbias[0];
-         gBias = ctx->Pixel.PCMCTbias[1];
-         bBias = ctx->Pixel.PCMCTbias[2];
-         aBias = ctx->Pixel.PCMCTbias[3];
+         table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
+         scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
+         bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
          break;
       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
-         table = &ctx->ProxyPostColorMatrixColorTable;
+         table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
          proxy = GL_TRUE;
          break;
       default:
@@ -483,10 +461,10 @@ _mesa_ColorTable( GLenum target, GLenum internalFormat,
 	 store_colortable_entries(ctx, table,
 				  0, width,  /* start, count */
 				  format, type, data,
-				  rScale, rBias,
-				  gScale, gBias,
-				  bScale, bBias,
-				  aScale, aBias);
+				  scale[0], bias[0],
+				  scale[1], bias[1],
+				  scale[2], bias[2],
+				  scale[3], bias[3]);
       }
    } /* proxy */
 
@@ -510,12 +488,14 @@ _mesa_ColorSubTable( GLenum target, GLsizei start,
                      GLsizei count, GLenum format, GLenum type,
                      const GLvoid *data )
 {
+   static const GLfloat one[4] = { 1.0, 1.0, 1.0, 1.0 };
+   static const GLfloat zero[4] = { 0.0, 0.0, 0.0, 0.0 };
    GET_CURRENT_CONTEXT(ctx);
    struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
    struct gl_texture_object *texObj = NULL;
    struct gl_color_table *table = NULL;
-   GLfloat rScale = 1.0, gScale = 1.0, bScale = 1.0, aScale = 1.0;
-   GLfloat rBias  = 0.0, gBias  = 0.0, bBias  = 0.0, aBias  = 0.0;
+   const GLfloat *scale = one, *bias = zero;
+
    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
    switch (target) {
@@ -543,15 +523,9 @@ _mesa_ColorSubTable( GLenum target, GLsizei start,
          table = &ctx->Texture.Palette;
          break;
       case GL_COLOR_TABLE:
-         table = &ctx->ColorTable;
-         rScale = ctx->Pixel.ColorTableScale[0];
-         gScale = ctx->Pixel.ColorTableScale[1];
-         bScale = ctx->Pixel.ColorTableScale[2];
-         aScale = ctx->Pixel.ColorTableScale[3];
-         rBias = ctx->Pixel.ColorTableBias[0];
-         gBias = ctx->Pixel.ColorTableBias[1];
-         bBias = ctx->Pixel.ColorTableBias[2];
-         aBias = ctx->Pixel.ColorTableBias[3];
+         table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
+         scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
+         bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
          break;
       case GL_TEXTURE_COLOR_TABLE_SGI:
          if (!ctx->Extensions.SGI_texture_color_table) {
@@ -559,36 +533,18 @@ _mesa_ColorSubTable( GLenum target, GLsizei start,
             return;
          }
          table = &(texUnit->ColorTable);
-         rScale = ctx->Pixel.TextureColorTableScale[0];
-         gScale = ctx->Pixel.TextureColorTableScale[1];
-         bScale = ctx->Pixel.TextureColorTableScale[2];
-         aScale = ctx->Pixel.TextureColorTableScale[3];
-         rBias = ctx->Pixel.TextureColorTableBias[0];
-         gBias = ctx->Pixel.TextureColorTableBias[1];
-         bBias = ctx->Pixel.TextureColorTableBias[2];
-         aBias = ctx->Pixel.TextureColorTableBias[3];
+         scale = ctx->Pixel.TextureColorTableScale;
+         bias = ctx->Pixel.TextureColorTableBias;
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE:
-         table = &ctx->PostConvolutionColorTable;
-         rScale = ctx->Pixel.PCCTscale[0];
-         gScale = ctx->Pixel.PCCTscale[1];
-         bScale = ctx->Pixel.PCCTscale[2];
-         aScale = ctx->Pixel.PCCTscale[3];
-         rBias = ctx->Pixel.PCCTbias[0];
-         gBias = ctx->Pixel.PCCTbias[1];
-         bBias = ctx->Pixel.PCCTbias[2];
-         aBias = ctx->Pixel.PCCTbias[3];
+         table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
+         scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
+         bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
-         table = &ctx->PostColorMatrixColorTable;
-         rScale = ctx->Pixel.PCMCTscale[0];
-         gScale = ctx->Pixel.PCMCTscale[1];
-         bScale = ctx->Pixel.PCMCTscale[2];
-         aScale = ctx->Pixel.PCMCTscale[3];
-         rBias = ctx->Pixel.PCMCTbias[0];
-         gBias = ctx->Pixel.PCMCTbias[1];
-         bBias = ctx->Pixel.PCMCTbias[2];
-         aBias = ctx->Pixel.PCMCTbias[3];
+         table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
+         scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
+         bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX];
          break;
       default:
          _mesa_error(ctx, GL_INVALID_ENUM, "glColorSubTable(target)");
@@ -623,10 +579,10 @@ _mesa_ColorSubTable( GLenum target, GLsizei start,
 
    store_colortable_entries(ctx, table, start, count,
 			    format, type, data,
-			    rScale, rBias,
-			    gScale, gBias,
-			    bScale, bBias,
-			    aScale, aBias);
+                            scale[0], bias[0],
+                            scale[1], bias[1],
+                            scale[2], bias[2],
+                            scale[3], bias[3]);
 
    if (texObj || target == GL_SHARED_TEXTURE_PALETTE_EXT) {
       /* per-texture object palette */
@@ -700,7 +656,7 @@ _mesa_GetColorTable( GLenum target, GLenum format,
          table = &ctx->Texture.Palette;
          break;
       case GL_COLOR_TABLE:
-         table = &ctx->ColorTable;
+         table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
          break;
       case GL_TEXTURE_COLOR_TABLE_SGI:
          if (!ctx->Extensions.SGI_texture_color_table) {
@@ -710,10 +666,10 @@ _mesa_GetColorTable( GLenum target, GLenum format,
          table = &(texUnit->ColorTable);
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE:
-         table = &ctx->PostConvolutionColorTable;
+         table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
-         table = &ctx->PostColorMatrixColorTable;
+         table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
          break;
       default:
          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTable(target)");
@@ -827,16 +783,10 @@ _mesa_ColorTableParameterfv(GLenum target, GLenum pname, const GLfloat *params)
    switch (target) {
       case GL_COLOR_TABLE_SGI:
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            ctx->Pixel.ColorTableScale[0] = params[0];
-            ctx->Pixel.ColorTableScale[1] = params[1];
-            ctx->Pixel.ColorTableScale[2] = params[2];
-            ctx->Pixel.ColorTableScale[3] = params[3];
+            COPY_4V(ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION], params);
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            ctx->Pixel.ColorTableBias[0] = params[0];
-            ctx->Pixel.ColorTableBias[1] = params[1];
-            ctx->Pixel.ColorTableBias[2] = params[2];
-            ctx->Pixel.ColorTableBias[3] = params[3];
+            COPY_4V(ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION], params);
          }
          else {
             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
@@ -849,16 +799,10 @@ _mesa_ColorTableParameterfv(GLenum target, GLenum pname, const GLfloat *params)
             return;
          }
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            ctx->Pixel.TextureColorTableScale[0] = params[0];
-            ctx->Pixel.TextureColorTableScale[1] = params[1];
-            ctx->Pixel.TextureColorTableScale[2] = params[2];
-            ctx->Pixel.TextureColorTableScale[3] = params[3];
+            COPY_4V(ctx->Pixel.TextureColorTableScale, params);
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            ctx->Pixel.TextureColorTableBias[0] = params[0];
-            ctx->Pixel.TextureColorTableBias[1] = params[1];
-            ctx->Pixel.TextureColorTableBias[2] = params[2];
-            ctx->Pixel.TextureColorTableBias[3] = params[3];
+            COPY_4V(ctx->Pixel.TextureColorTableBias, params);
          }
          else {
             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
@@ -867,16 +811,10 @@ _mesa_ColorTableParameterfv(GLenum target, GLenum pname, const GLfloat *params)
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            ctx->Pixel.PCCTscale[0] = params[0];
-            ctx->Pixel.PCCTscale[1] = params[1];
-            ctx->Pixel.PCCTscale[2] = params[2];
-            ctx->Pixel.PCCTscale[3] = params[3];
+            COPY_4V(ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION], params);
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            ctx->Pixel.PCCTbias[0] = params[0];
-            ctx->Pixel.PCCTbias[1] = params[1];
-            ctx->Pixel.PCCTbias[2] = params[2];
-            ctx->Pixel.PCCTbias[3] = params[3];
+            COPY_4V(ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION], params);
          }
          else {
             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
@@ -885,16 +823,10 @@ _mesa_ColorTableParameterfv(GLenum target, GLenum pname, const GLfloat *params)
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            ctx->Pixel.PCMCTscale[0] = params[0];
-            ctx->Pixel.PCMCTscale[1] = params[1];
-            ctx->Pixel.PCMCTscale[2] = params[2];
-            ctx->Pixel.PCMCTscale[3] = params[3];
+            COPY_4V(ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX], params);
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            ctx->Pixel.PCMCTbias[0] = params[0];
-            ctx->Pixel.PCMCTbias[1] = params[1];
-            ctx->Pixel.PCMCTbias[2] = params[2];
-            ctx->Pixel.PCMCTbias[3] = params[3];
+            COPY_4V(ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX], params);
          }
          else {
             _mesa_error(ctx, GL_INVALID_ENUM, "glColorTableParameterfv(pname)");
@@ -981,24 +913,18 @@ _mesa_GetColorTableParameterfv( GLenum target, GLenum pname, GLfloat *params )
          table = &ctx->Texture.Palette;
          break;
       case GL_COLOR_TABLE:
-         table = &ctx->ColorTable;
+         table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            params[0] = ctx->Pixel.ColorTableScale[0];
-            params[1] = ctx->Pixel.ColorTableScale[1];
-            params[2] = ctx->Pixel.ColorTableScale[2];
-            params[3] = ctx->Pixel.ColorTableScale[3];
+            COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION]);
             return;
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            params[0] = ctx->Pixel.ColorTableBias[0];
-            params[1] = ctx->Pixel.ColorTableBias[1];
-            params[2] = ctx->Pixel.ColorTableBias[2];
-            params[3] = ctx->Pixel.ColorTableBias[3];
+            COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION]);
             return;
          }
          break;
       case GL_PROXY_COLOR_TABLE:
-         table = &ctx->ProxyColorTable;
+         table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
          break;
       case GL_TEXTURE_COLOR_TABLE_SGI:
          if (!ctx->Extensions.SGI_texture_color_table) {
@@ -1007,17 +933,11 @@ _mesa_GetColorTableParameterfv( GLenum target, GLenum pname, GLfloat *params )
          }
          table = &(texUnit->ColorTable);
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            params[0] = ctx->Pixel.TextureColorTableScale[0];
-            params[1] = ctx->Pixel.TextureColorTableScale[1];
-            params[2] = ctx->Pixel.TextureColorTableScale[2];
-            params[3] = ctx->Pixel.TextureColorTableScale[3];
+            COPY_4V(params, ctx->Pixel.TextureColorTableScale);
             return;
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            params[0] = ctx->Pixel.TextureColorTableBias[0];
-            params[1] = ctx->Pixel.TextureColorTableBias[1];
-            params[2] = ctx->Pixel.TextureColorTableBias[2];
-            params[3] = ctx->Pixel.TextureColorTableBias[3];
+            COPY_4V(params, ctx->Pixel.TextureColorTableBias);
             return;
          }
          break;
@@ -1029,44 +949,32 @@ _mesa_GetColorTableParameterfv( GLenum target, GLenum pname, GLfloat *params )
          table = &(texUnit->ProxyColorTable);
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE:
-         table = &ctx->PostConvolutionColorTable;
+         table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            params[0] = ctx->Pixel.PCCTscale[0];
-            params[1] = ctx->Pixel.PCCTscale[1];
-            params[2] = ctx->Pixel.PCCTscale[2];
-            params[3] = ctx->Pixel.PCCTscale[3];
+            COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION]);
             return;
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            params[0] = ctx->Pixel.PCCTbias[0];
-            params[1] = ctx->Pixel.PCCTbias[1];
-            params[2] = ctx->Pixel.PCCTbias[2];
-            params[3] = ctx->Pixel.PCCTbias[3];
+            COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION]);
             return;
          }
          break;
       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
-         table = &ctx->ProxyPostConvolutionColorTable;
+         table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
-         table = &ctx->PostColorMatrixColorTable;
+         table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            params[0] = ctx->Pixel.PCMCTscale[0];
-            params[1] = ctx->Pixel.PCMCTscale[1];
-            params[2] = ctx->Pixel.PCMCTscale[2];
-            params[3] = ctx->Pixel.PCMCTscale[3];
+            COPY_4V(params, ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX]);
             return;
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            params[0] = ctx->Pixel.PCMCTbias[0];
-            params[1] = ctx->Pixel.PCMCTbias[1];
-            params[2] = ctx->Pixel.PCMCTbias[2];
-            params[3] = ctx->Pixel.PCMCTbias[3];
+            COPY_4V(params, ctx->Pixel.ColorTableBias[COLORTABLE_POSTCOLORMATRIX]);
             return;
          }
          break;
       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
-         table = &ctx->ProxyPostColorMatrixColorTable;
+         table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
          break;
       default:
          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameterfv(target)");
@@ -1155,24 +1063,26 @@ _mesa_GetColorTableParameteriv( GLenum target, GLenum pname, GLint *params )
          table = &ctx->Texture.Palette;
          break;
       case GL_COLOR_TABLE:
-         table = &ctx->ColorTable;
+         table = &ctx->ColorTable[COLORTABLE_PRECONVOLUTION];
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            params[0] = (GLint) ctx->Pixel.ColorTableScale[0];
-            params[1] = (GLint) ctx->Pixel.ColorTableScale[1];
-            params[2] = (GLint) ctx->Pixel.ColorTableScale[2];
-            params[3] = (GLint) ctx->Pixel.ColorTableScale[3];
+            GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_PRECONVOLUTION];
+            params[0] = (GLint) scale[0];
+            params[1] = (GLint) scale[1];
+            params[2] = (GLint) scale[2];
+            params[3] = (GLint) scale[3];
             return;
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            params[0] = (GLint) ctx->Pixel.ColorTableBias[0];
-            params[1] = (GLint) ctx->Pixel.ColorTableBias[1];
-            params[2] = (GLint) ctx->Pixel.ColorTableBias[2];
-            params[3] = (GLint) ctx->Pixel.ColorTableBias[3];
+            GLfloat *bias = ctx->Pixel.ColorTableBias[COLORTABLE_PRECONVOLUTION];
+            params[0] = (GLint) bias[0];
+            params[1] = (GLint) bias[1];
+            params[2] = (GLint) bias[2];
+            params[3] = (GLint) bias[3];
             return;
          }
          break;
       case GL_PROXY_COLOR_TABLE:
-         table = &ctx->ProxyColorTable;
+         table = &ctx->ProxyColorTable[COLORTABLE_PRECONVOLUTION];
          break;
       case GL_TEXTURE_COLOR_TABLE_SGI:
          if (!ctx->Extensions.SGI_texture_color_table) {
@@ -1203,44 +1113,48 @@ _mesa_GetColorTableParameteriv( GLenum target, GLenum pname, GLint *params )
          table = &(texUnit->ProxyColorTable);
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE:
-         table = &ctx->PostConvolutionColorTable;
+         table = &ctx->ColorTable[COLORTABLE_POSTCONVOLUTION];
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            params[0] = (GLint) ctx->Pixel.PCCTscale[0];
-            params[1] = (GLint) ctx->Pixel.PCCTscale[1];
-            params[2] = (GLint) ctx->Pixel.PCCTscale[2];
-            params[3] = (GLint) ctx->Pixel.PCCTscale[3];
+            GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCONVOLUTION];
+            params[0] = (GLint) scale[0];
+            params[1] = (GLint) scale[1];
+            params[2] = (GLint) scale[2];
+            params[3] = (GLint) scale[3];
             return;
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            params[0] = (GLint) ctx->Pixel.PCCTbias[0];
-            params[1] = (GLint) ctx->Pixel.PCCTbias[1];
-            params[2] = (GLint) ctx->Pixel.PCCTbias[2];
-            params[3] = (GLint) ctx->Pixel.PCCTbias[3];
+            GLfloat *bias = ctx->Pixel.ColorTableBias[COLORTABLE_POSTCONVOLUTION];
+            params[0] = (GLint) bias[0];
+            params[1] = (GLint) bias[1];
+            params[2] = (GLint) bias[2];
+            params[3] = (GLint) bias[3];
             return;
          }
          break;
       case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
-         table = &ctx->ProxyPostConvolutionColorTable;
+         table = &ctx->ProxyColorTable[COLORTABLE_POSTCONVOLUTION];
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE:
-         table = &ctx->PostColorMatrixColorTable;
+         table = &ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX];
          if (pname == GL_COLOR_TABLE_SCALE_SGI) {
-            params[0] = (GLint) ctx->Pixel.PCMCTscale[0];
-            params[1] = (GLint) ctx->Pixel.PCMCTscale[1];
-            params[2] = (GLint) ctx->Pixel.PCMCTscale[2];
-            params[3] = (GLint) ctx->Pixel.PCMCTscale[3];
+            GLfloat *scale = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
+            params[0] = (GLint) scale[0];
+            params[0] = (GLint) scale[1];
+            params[0] = (GLint) scale[2];
+            params[0] = (GLint) scale[3];
             return;
          }
          else if (pname == GL_COLOR_TABLE_BIAS_SGI) {
-            params[0] = (GLint) ctx->Pixel.PCMCTbias[0];
-            params[1] = (GLint) ctx->Pixel.PCMCTbias[1];
-            params[2] = (GLint) ctx->Pixel.PCMCTbias[2];
-            params[3] = (GLint) ctx->Pixel.PCMCTbias[3];
+            GLfloat *bias = ctx->Pixel.ColorTableScale[COLORTABLE_POSTCOLORMATRIX];
+            params[0] = (GLint) bias[0];
+            params[1] = (GLint) bias[1];
+            params[2] = (GLint) bias[2];
+            params[3] = (GLint) bias[3];
             return;
          }
          break;
       case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
-         table = &ctx->ProxyPostColorMatrixColorTable;
+         table = &ctx->ProxyColorTable[COLORTABLE_POSTCOLORMATRIX];
          break;
       default:
          _mesa_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameteriv(target)");
@@ -1316,13 +1230,11 @@ _mesa_free_colortable_data( struct gl_color_table *p )
 void
 _mesa_init_colortables( GLcontext * ctx )
 {
-   /* Color tables */
-   _mesa_init_colortable(&ctx->ColorTable);
-   _mesa_init_colortable(&ctx->ProxyColorTable);
-   _mesa_init_colortable(&ctx->PostConvolutionColorTable);
-   _mesa_init_colortable(&ctx->ProxyPostConvolutionColorTable);
-   _mesa_init_colortable(&ctx->PostColorMatrixColorTable);
-   _mesa_init_colortable(&ctx->ProxyPostColorMatrixColorTable);
+   GLuint i;
+   for (i = 0; i < COLORTABLE_MAX; i++) {
+      _mesa_init_colortable(&ctx->ColorTable[i]);
+      _mesa_init_colortable(&ctx->ProxyColorTable[i]);
+   }
 }
 
 
@@ -1332,10 +1244,9 @@ _mesa_init_colortables( GLcontext * ctx )
 void
 _mesa_free_colortables_data( GLcontext *ctx )
 {
-   _mesa_free_colortable_data(&ctx->ColorTable);
-   _mesa_free_colortable_data(&ctx->ProxyColorTable);
-   _mesa_free_colortable_data(&ctx->PostConvolutionColorTable);
-   _mesa_free_colortable_data(&ctx->ProxyPostConvolutionColorTable);
-   _mesa_free_colortable_data(&ctx->PostColorMatrixColorTable);
-   _mesa_free_colortable_data(&ctx->ProxyPostColorMatrixColorTable);
+   GLuint i;
+   for (i = 0; i < COLORTABLE_MAX; i++) {
+      _mesa_free_colortable_data(&ctx->ColorTable[i]);
+      _mesa_free_colortable_data(&ctx->ProxyColorTable[i]);
+   }
 }
diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index 0d54c29949b..11b4ad6400e 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -663,24 +663,24 @@ _mesa_set_enable(GLcontext *ctx, GLenum cap, GLboolean state)
       /* GL_SGI_color_table */
       case GL_COLOR_TABLE_SGI:
          CHECK_EXTENSION(SGI_color_table, cap);
-         if (ctx->Pixel.ColorTableEnabled == state)
+         if (ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION] == state)
             return;
          FLUSH_VERTICES(ctx, _NEW_PIXEL);
-         ctx->Pixel.ColorTableEnabled = state;
+         ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION] = state;
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
          CHECK_EXTENSION(SGI_color_table, cap);
-         if (ctx->Pixel.PostConvolutionColorTableEnabled == state)
+         if (ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION] == state)
             return;
          FLUSH_VERTICES(ctx, _NEW_PIXEL);
-         ctx->Pixel.PostConvolutionColorTableEnabled = state;
+         ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION] = state;
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
          CHECK_EXTENSION(SGI_color_table, cap);
-         if (ctx->Pixel.PostColorMatrixColorTableEnabled == state)
+         if (ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX] == state)
             return;
          FLUSH_VERTICES(ctx, _NEW_PIXEL);
-         ctx->Pixel.PostColorMatrixColorTableEnabled = state;
+         ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX] = state;
          break;
       case GL_TEXTURE_COLOR_TABLE_SGI:
          CHECK_EXTENSION(SGI_texture_color_table, cap);
@@ -1192,13 +1192,13 @@ _mesa_IsEnabled( GLenum cap )
       /* GL_SGI_color_table */
       case GL_COLOR_TABLE_SGI:
          CHECK_EXTENSION(SGI_color_table);
-         return ctx->Pixel.ColorTableEnabled;
+         return ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION];
       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
          CHECK_EXTENSION(SGI_color_table);
-         return ctx->Pixel.PostConvolutionColorTableEnabled;
+         return ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION];
       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
          CHECK_EXTENSION(SGI_color_table);
-         return ctx->Pixel.PostColorMatrixColorTableEnabled;
+         return ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX];
 
       /* GL_SGI_texture_color_table */
       case GL_TEXTURE_COLOR_TABLE_SGI:
diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c
index 3136a950e08..cd4f594aa29 100644
--- a/src/mesa/main/framebuffer.c
+++ b/src/mesa/main/framebuffer.c
@@ -647,7 +647,7 @@ update_color_draw_buffers(GLcontext *ctx, struct gl_framebuffer *fb)
             const GLuint bufferBit = 1 << i;
             if (bufferBit & bufferMask) {
                struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
-               if (rb) {
+               if (rb && rb->Width > 0 && rb->Height > 0) {
                   fb->_ColorDrawBuffers[output][count] = rb;
                   count++;
                }
@@ -673,7 +673,10 @@ static void
 update_color_read_buffer(GLcontext *ctx, struct gl_framebuffer *fb)
 {
    (void) ctx;
-   if (fb->_ColorReadBufferIndex == -1 || fb->DeletePending) {
+   if (fb->_ColorReadBufferIndex == -1 ||
+       fb->DeletePending ||
+       fb->Width == 0 ||
+       fb->Height == 0) {
       fb->_ColorReadBuffer = NULL; /* legal! */
    }
    else {
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index 7601f320697..4eda3491341 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -1283,15 +1283,15 @@ _mesa_GetBooleanv( GLenum pname, GLboolean *params )
          break;
       case GL_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_color_table, "GetBooleanv");
-         params[0] = ctx->Pixel.ColorTableEnabled;
+         params[0] = ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION];
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_color_table, "GetBooleanv");
-         params[0] = ctx->Pixel.PostConvolutionColorTableEnabled;
+         params[0] = ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION];
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_color_table, "GetBooleanv");
-         params[0] = ctx->Pixel.PostColorMatrixColorTableEnabled;
+         params[0] = ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX];
          break;
       case GL_TEXTURE_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_texture_color_table, "GetBooleanv");
@@ -3110,15 +3110,15 @@ _mesa_GetFloatv( GLenum pname, GLfloat *params )
          break;
       case GL_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_color_table, "GetFloatv");
-         params[0] = BOOLEAN_TO_FLOAT(ctx->Pixel.ColorTableEnabled);
+         params[0] = BOOLEAN_TO_FLOAT(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION]);
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_color_table, "GetFloatv");
-         params[0] = BOOLEAN_TO_FLOAT(ctx->Pixel.PostConvolutionColorTableEnabled);
+         params[0] = BOOLEAN_TO_FLOAT(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION]);
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_color_table, "GetFloatv");
-         params[0] = BOOLEAN_TO_FLOAT(ctx->Pixel.PostColorMatrixColorTableEnabled);
+         params[0] = BOOLEAN_TO_FLOAT(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX]);
          break;
       case GL_TEXTURE_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_texture_color_table, "GetFloatv");
@@ -4937,15 +4937,15 @@ _mesa_GetIntegerv( GLenum pname, GLint *params )
          break;
       case GL_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_color_table, "GetIntegerv");
-         params[0] = BOOLEAN_TO_INT(ctx->Pixel.ColorTableEnabled);
+         params[0] = BOOLEAN_TO_INT(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION]);
          break;
       case GL_POST_CONVOLUTION_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_color_table, "GetIntegerv");
-         params[0] = BOOLEAN_TO_INT(ctx->Pixel.PostConvolutionColorTableEnabled);
+         params[0] = BOOLEAN_TO_INT(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION]);
          break;
       case GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_color_table, "GetIntegerv");
-         params[0] = BOOLEAN_TO_INT(ctx->Pixel.PostColorMatrixColorTableEnabled);
+         params[0] = BOOLEAN_TO_INT(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX]);
          break;
       case GL_TEXTURE_COLOR_TABLE_SGI:
          CHECK_EXT1(SGI_texture_color_table, "GetIntegerv");
diff --git a/src/mesa/main/get_gen.py b/src/mesa/main/get_gen.py
index 76417d28991..0b6cd3e5c58 100644
--- a/src/mesa/main/get_gen.py
+++ b/src/mesa/main/get_gen.py
@@ -624,11 +624,11 @@ StateVars = [
 
 	# GL_SGI_color_table / GL_ARB_imaging
 	( "GL_COLOR_TABLE_SGI", GLboolean,
-	  ["ctx->Pixel.ColorTableEnabled"], "", ["SGI_color_table"] ),
+	  ["ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION]"], "", ["SGI_color_table"] ),
 	( "GL_POST_CONVOLUTION_COLOR_TABLE_SGI", GLboolean,
-	  ["ctx->Pixel.PostConvolutionColorTableEnabled"], "", ["SGI_color_table"] ),
+	  ["ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION]"], "", ["SGI_color_table"] ),
 	( "GL_POST_COLOR_MATRIX_COLOR_TABLE_SGI", GLboolean,
-	  ["ctx->Pixel.PostColorMatrixColorTableEnabled"], "", ["SGI_color_table"] ),
+	  ["ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX]"], "", ["SGI_color_table"] ),
 
 	# GL_SGI_texture_color_table
 	( "GL_TEXTURE_COLOR_TABLE_SGI", GLboolean,
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index f53730cbcf5..cad9736b30b 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -1036,7 +1036,7 @@ _mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps,
    }
    /* GL_COLOR_TABLE lookup */
    if (transferOps & IMAGE_COLOR_TABLE_BIT) {
-      _mesa_lookup_rgba_float(&ctx->ColorTable, n, rgba);
+      _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_PRECONVOLUTION], n, rgba);
    }
    /* convolution */
    if (transferOps & IMAGE_CONVOLUTION_BIT) {
@@ -1057,7 +1057,7 @@ _mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps,
    }
    /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
    if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
-      _mesa_lookup_rgba_float(&ctx->PostConvolutionColorTable, n, rgba);
+      _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCONVOLUTION], n, rgba);
    }
    /* color matrix transform */
    if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
@@ -1065,7 +1065,7 @@ _mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps,
    }
    /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
    if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
-      _mesa_lookup_rgba_float(&ctx->PostColorMatrixColorTable, n, rgba);
+      _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX], n, rgba);
    }
    /* update histogram count */
    if (transferOps & IMAGE_HISTOGRAM_BIT) {
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index bced1a64d98..65246eb116b 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -383,6 +383,13 @@ enum {
                             BUFFER_BIT_COLOR7)
 
 
+/** The pixel transfer path has three color tables: */
+/*@{*/
+#define COLORTABLE_PRECONVOLUTION  0
+#define COLORTABLE_POSTCONVOLUTION 1
+#define COLORTABLE_POSTCOLORMATRIX 2
+#define COLORTABLE_MAX 3
+/*@}*/
 
 
 /**
@@ -663,9 +670,7 @@ struct gl_enable_attrib
    GLboolean Blend;
    GLbitfield ClipPlanes;
    GLboolean ColorMaterial;
-   GLboolean ColorTable;                /* SGI_color_table */
-   GLboolean PostColorMatrixColorTable; /* SGI_color_table */
-   GLboolean PostConvolutionColorTable; /* SGI_color_table */
+   GLboolean ColorTable[COLORTABLE_MAX];
    GLboolean Convolution1D;
    GLboolean Convolution2D;
    GLboolean Separable2D;
@@ -1016,11 +1021,10 @@ struct gl_pixel_attrib
    GLboolean MapColorFlag;
    GLboolean MapStencilFlag;
 
-   /* Color table lookup (GL_SGI_color_table) */
-   /* Note: actual table is not part of this attrib group */
-   GLfloat ColorTableScale[4];
-   GLfloat ColorTableBias[4];
-   GLboolean ColorTableEnabled;
+   /* There are multiple color table stages: */
+   GLboolean ColorTableEnabled[COLORTABLE_MAX];
+   GLfloat ColorTableScale[COLORTABLE_MAX][4];  /**< RGBA */
+   GLfloat ColorTableBias[COLORTABLE_MAX][4];   /**< RGBA */
 
    /* Convolution (GL_EXT_convolution) */
    GLboolean Convolution1DEnabled;
@@ -1033,23 +1037,11 @@ struct gl_pixel_attrib
    GLfloat PostConvolutionScale[4];  /**< RGBA */
    GLfloat PostConvolutionBias[4];   /**< RGBA */
 
-   /* Post-convolution color table */
-   /* Note: actual table is not part of this attrib group */
-   GLboolean PostConvolutionColorTableEnabled;
-   GLfloat PCCTscale[4];  /** Post Convolution Color Table scale */
-   GLfloat PCCTbias[4];   /** Post Convolution Color Table bias */
-
    /* Color matrix (GL_SGI_color_matrix) */
    /* Note: the color matrix is not part of this attrib group */
    GLfloat PostColorMatrixScale[4];  /**< RGBA */
    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 
-   /* Post color matrix color table */
-   /* Note: actual table is not part of this attrib group */
-   GLboolean PostColorMatrixColorTableEnabled;
-   GLfloat PCMCTscale[4]; /** Post Color Matrix Color Table scale */
-   GLfloat PCMCTbias[4];  /** Post Color Matrix Color Table bias */
-
    /* Histogram & minmax (GL_EXT_histogram) */
    /* Note: histogram and minmax data are not part of this attrib group */
    GLboolean HistogramEnabled;
@@ -2169,7 +2161,7 @@ struct gl_renderbuffer
    GLubyte IndexBits;
    GLubyte DepthBits;
    GLubyte StencilBits;
-   GLvoid *Data;
+   GLvoid *Data;        /**< This may not be used by some kinds of RBs */
 
    /* Used to wrap one renderbuffer around another: */
    struct gl_renderbuffer *Wrapped;
@@ -2934,12 +2926,14 @@ struct __GLcontextRec
    struct gl_feedback   Feedback;  /**< Feedback */
    struct gl_selection  Select;    /**< Selection */
 
-   struct gl_color_table ColorTable;       /**< Pre-convolution */
-   struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
+   struct gl_color_table ColorTable[COLORTABLE_MAX];
+   struct gl_color_table ProxyColorTable[COLORTABLE_MAX];
+#if 0
    struct gl_color_table PostConvolutionColorTable;
    struct gl_color_table ProxyPostConvolutionColorTable;
    struct gl_color_table PostColorMatrixColorTable;
    struct gl_color_table ProxyPostColorMatrixColorTable;
+#endif
 
    struct gl_program_state Program;        /**< for vertex or fragment progs */
    struct gl_vertex_program_state VertexProgram;   /**< GL_ARB/NV_vertex_program */
diff --git a/src/mesa/main/pixel.c b/src/mesa/main/pixel.c
index ae014a23c4c..b9e23d80b62 100644
--- a/src/mesa/main/pixel.c
+++ b/src/mesa/main/pixel.c
@@ -1367,7 +1367,7 @@ update_image_transfer_state(GLcontext *ctx)
    if (ctx->Pixel.MapColorFlag)
       mask |= IMAGE_MAP_COLOR_BIT;
 
-   if (ctx->Pixel.ColorTableEnabled)
+   if (ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION])
       mask |= IMAGE_COLOR_TABLE_BIT;
 
    if (ctx->Pixel.Convolution1DEnabled ||
@@ -1386,7 +1386,7 @@ update_image_transfer_state(GLcontext *ctx)
       }
    }
 
-   if (ctx->Pixel.PostConvolutionColorTableEnabled)
+   if (ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION])
       mask |= IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT;
 
    if (ctx->ColorMatrixStack.Top->type != MATRIX_IDENTITY ||
@@ -1400,7 +1400,7 @@ update_image_transfer_state(GLcontext *ctx)
        ctx->Pixel.PostColorMatrixBias[3]  != 0.0F)
       mask |= IMAGE_COLOR_MATRIX_BIT;
 
-   if (ctx->Pixel.PostColorMatrixColorTableEnabled)
+   if (ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX])
       mask |= IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT;
 
    if (ctx->Pixel.HistogramEnabled)
@@ -1477,15 +1477,11 @@ _mesa_init_pixel( GLcontext *ctx )
    ctx->Pixel.MinMaxEnabled = GL_FALSE;
    ASSIGN_4V(ctx->Pixel.PostColorMatrixScale, 1.0, 1.0, 1.0, 1.0);
    ASSIGN_4V(ctx->Pixel.PostColorMatrixBias, 0.0, 0.0, 0.0, 0.0);
-   ASSIGN_4V(ctx->Pixel.ColorTableScale, 1.0, 1.0, 1.0, 1.0);
-   ASSIGN_4V(ctx->Pixel.ColorTableBias, 0.0, 0.0, 0.0, 0.0);
-   ASSIGN_4V(ctx->Pixel.PCCTscale, 1.0, 1.0, 1.0, 1.0);
-   ASSIGN_4V(ctx->Pixel.PCCTbias, 0.0, 0.0, 0.0, 0.0);
-   ASSIGN_4V(ctx->Pixel.PCMCTscale, 1.0, 1.0, 1.0, 1.0);
-   ASSIGN_4V(ctx->Pixel.PCMCTbias, 0.0, 0.0, 0.0, 0.0);
-   ctx->Pixel.ColorTableEnabled = GL_FALSE;
-   ctx->Pixel.PostConvolutionColorTableEnabled = GL_FALSE;
-   ctx->Pixel.PostColorMatrixColorTableEnabled = GL_FALSE;
+   for (i = 0; i < COLORTABLE_MAX; i++) {
+      ASSIGN_4V(ctx->Pixel.ColorTableScale[i], 1.0, 1.0, 1.0, 1.0);
+      ASSIGN_4V(ctx->Pixel.ColorTableBias[i], 0.0, 0.0, 0.0, 0.0);
+      ctx->Pixel.ColorTableEnabled[i] = GL_FALSE;
+   }
    ctx->Pixel.Convolution1DEnabled = GL_FALSE;
    ctx->Pixel.Convolution2DEnabled = GL_FALSE;
    ctx->Pixel.Separable2DEnabled = GL_FALSE;
diff --git a/src/mesa/main/renderbuffer.c b/src/mesa/main/renderbuffer.c
index 1cc95a7d3b4..e387c42c345 100644
--- a/src/mesa/main/renderbuffer.c
+++ b/src/mesa/main/renderbuffer.c
@@ -1192,18 +1192,22 @@ _mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
    ASSERT(rb->PutMonoValues);
 
    /* free old buffer storage */
-   if (rb->Data)
+   if (rb->Data) {
       _mesa_free(rb->Data);
-
-   /* allocate new buffer storage */
-   rb->Data = _mesa_malloc(width * height * pixelSize);
-   if (rb->Data == NULL) {
-      rb->Width = 0;
-      rb->Height = 0;
-      _mesa_error(ctx, GL_OUT_OF_MEMORY,
-                  "software renderbuffer allocation (%d x %d x %d)",
-                  width, height, pixelSize);
-      return GL_FALSE;
+      rb->Data = NULL;
+   }
+
+   if (width > 0 && height > 0) {
+      /* allocate new buffer storage */
+      rb->Data = _mesa_malloc(width * height * pixelSize);
+      if (rb->Data == NULL) {
+         rb->Width = 0;
+         rb->Height = 0;
+         _mesa_error(ctx, GL_OUT_OF_MEMORY,
+                     "software renderbuffer allocation (%d x %d x %d)",
+                     width, height, pixelSize);
+         return GL_FALSE;
+      }
    }
 
    rb->Width = width;