From b9c84e8e3433d8804b99ec82065ec1e920469d87 Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Tue, 13 Dec 2011 15:54:46 +0100
Subject: git update pixman mesa 13 dec 2011

---
 mesalib/src/mesa/main/depthstencil.c | 959 -----------------------------------
 1 file changed, 959 deletions(-)
 delete mode 100644 mesalib/src/mesa/main/depthstencil.c

(limited to 'mesalib/src/mesa/main/depthstencil.c')

diff --git a/mesalib/src/mesa/main/depthstencil.c b/mesalib/src/mesa/main/depthstencil.c
deleted file mode 100644
index af5c12f67..000000000
--- a/mesalib/src/mesa/main/depthstencil.c
+++ /dev/null
@@ -1,959 +0,0 @@
-/*
- * Mesa 3-D graphics library
- * Version:  6.5
- *
- * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include "glheader.h"
-#include "imports.h"
-#include "context.h"
-#include "formats.h"
-#include "mtypes.h"
-#include "depthstencil.h"
-#include "renderbuffer.h"
-
-
-/**
- * Adaptor/wrappers for GL_DEPTH_STENCIL renderbuffers.
- *
- * The problem with a GL_DEPTH_STENCIL renderbuffer is that sometimes we
- * want to treat it as a stencil buffer, other times we want to treat it
- * as a depth/z buffer and still other times when we want to treat it as
- * a combined Z+stencil buffer!  That implies we need three different sets
- * of Get/Put functions.
- *
- * We solve this by wrapping the Z24_S8 or S8_Z24 renderbuffer with depth and
- * stencil adaptors, each with the right kind of depth/stencil Get/Put functions.
- */
-
-
-static void *
-nop_get_pointer(struct gl_context *ctx, struct gl_renderbuffer *rb, GLint x, GLint y)
-{
-   (void) ctx;
-   (void) rb;
-   (void) x;
-   (void) y;
-   return NULL;
-}
-
-
-/**
- * Delete a depth or stencil wrapper renderbuffer.
- */
-static void
-delete_wrapper(struct gl_renderbuffer *rb)
-{
-   ASSERT(rb->Format == MESA_FORMAT_S8 ||
-          rb->Format == MESA_FORMAT_X8_Z24 ||
-          rb->Format == MESA_FORMAT_Z32_FLOAT);
-   _mesa_reference_renderbuffer(&rb->Wrapped, NULL);
-   free(rb);
-}
-
-
-/**
- * Realloc storage for wrapper.
- */
-static GLboolean
-alloc_wrapper_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
-                      GLenum internalFormat, GLuint width, GLuint height)
-{
-   /* just pass this on to the wrapped renderbuffer */
-   struct gl_renderbuffer *dsrb = rb->Wrapped;
-   GLboolean retVal;
-
-   (void) internalFormat;
-
-   ASSERT(dsrb->Format == MESA_FORMAT_Z24_S8 ||
-          dsrb->Format == MESA_FORMAT_Z24_X8 ||
-          dsrb->Format == MESA_FORMAT_S8_Z24 ||
-          dsrb->Format == MESA_FORMAT_X8_Z24);
-
-   retVal = dsrb->AllocStorage(ctx, dsrb, dsrb->InternalFormat, width, height);
-   if (retVal) {
-      rb->Width = width;
-      rb->Height = height;
-      rb->RowStride = dsrb->RowStride;
-   }
-   return retVal;
-}
-
-
-
-
-/*======================================================================
- * Depth wrapper around depth/stencil renderbuffer
- */
-
-static void
-get_row_z24(struct gl_context *ctx, struct gl_renderbuffer *z24rb, GLuint count,
-            GLint x, GLint y, void *values)
-{
-   struct gl_renderbuffer *dsrb = z24rb->Wrapped;
-   GLuint temp[MAX_WIDTH], i;
-   GLuint *dst = (GLuint *) values;
-   const GLuint *src = (const GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
-   ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
-   if (!src) {
-      dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      src = temp;
-   }
-   if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-      for (i = 0; i < count; i++) {
-         dst[i] = src[i] >> 8;
-      }
-   }
-   else {
-      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-      for (i = 0; i < count; i++) {
-         dst[i] = src[i] & 0xffffff;
-      }
-   }
-}
-
-static void
-get_values_z24(struct gl_context *ctx, struct gl_renderbuffer *z24rb, GLuint count,
-               const GLint x[], const GLint y[], void *values)
-{
-   struct gl_renderbuffer *dsrb = z24rb->Wrapped;
-   GLuint temp[MAX_WIDTH], i;
-   GLuint *dst = (GLuint *) values;
-   ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
-   ASSERT(count <= MAX_WIDTH);
-   /* don't bother trying direct access */
-   dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-      for (i = 0; i < count; i++) {
-         dst[i] = temp[i] >> 8;
-      }
-   }
-   else {
-      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-      for (i = 0; i < count; i++) {
-         dst[i] = temp[i] & 0xffffff;
-      }
-   }
-}
-
-static void
-put_row_z24(struct gl_context *ctx, struct gl_renderbuffer *z24rb, GLuint count,
-            GLint x, GLint y, const void *values, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = z24rb->Wrapped;
-   const GLuint *src = (const GLuint *) values;
-   GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
-   ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
-   if (dst) {
-      /* direct access */
-      GLuint i;
-      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i] = (src[i] << 8) | (dst[i] & 0xff);
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i] = (src[i] & 0xffffff) | (dst[i] & 0xff000000);
-            }
-         }
-      }
-   }
-   else {
-      /* get, modify, put */
-      GLuint temp[MAX_WIDTH], i;
-      dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (src[i] << 8) | (temp[i] & 0xff);
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (src[i] & 0xffffff) | (temp[i] & 0xff000000);
-            }
-         }
-      }
-      dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
-   }
-}
-
-static void
-put_mono_row_z24(struct gl_context *ctx, struct gl_renderbuffer *z24rb, GLuint count,
-                 GLint x, GLint y, const void *value, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = z24rb->Wrapped;
-   GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
-   ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
-   if (dst) {
-      /* direct access */
-      GLuint i;
-      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         const GLuint shiftedVal = *((GLuint *) value) << 8;
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i] = shiftedVal | (dst[i] & 0xff);
-            }
-         }
-      }
-      else {
-         const GLuint shiftedVal = *((GLuint *) value);
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i] = shiftedVal | (dst[i] & 0xff000000);
-            }
-         }
-      }
-   }
-   else {
-      /* get, modify, put */
-      GLuint temp[MAX_WIDTH], i;
-      dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         const GLuint shiftedVal = *((GLuint *) value) << 8;
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = shiftedVal | (temp[i] & 0xff);
-            }
-         }
-      }
-      else {
-         const GLuint shiftedVal = *((GLuint *) value);
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = shiftedVal | (temp[i] & 0xff000000);
-            }
-         }
-      }
-      dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
-   }
-}
-
-static void
-put_values_z24(struct gl_context *ctx, struct gl_renderbuffer *z24rb, GLuint count,
-               const GLint x[], const GLint y[],
-               const void *values, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = z24rb->Wrapped;
-   const GLuint *src = (const GLuint *) values;
-   ASSERT(z24rb->DataType == GL_UNSIGNED_INT);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
-   if (dsrb->GetPointer(ctx, dsrb, 0, 0)) {
-      /* direct access */
-      GLuint i;
-      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
-               *dst = (src[i] << 8) | (*dst & 0xff);
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
-               *dst = (src[i] & 0xffffff) | (*dst & 0xff000000);
-            }
-         }
-      }
-   }
-   else {
-      /* get, modify, put */
-      GLuint temp[MAX_WIDTH], i;
-      dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-      if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (src[i] << 8) | (temp[i] & 0xff);
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (src[i] & 0xffffff) | (temp[i] & 0xff000000);
-            }
-         }
-      }
-      dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
-   }
-}
-
-static void
-put_mono_values_z24(struct gl_context *ctx, struct gl_renderbuffer *z24rb,
-                    GLuint count, const GLint x[], const GLint y[],
-                    const void *value, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = z24rb->Wrapped;
-   GLuint temp[MAX_WIDTH], i;
-   /* get, modify, put */
-   dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-      const GLuint shiftedVal = *((GLuint *) value) << 8;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = shiftedVal | (temp[i] & 0xff);
-         }
-      }
-   }
-   else {
-      const GLuint shiftedVal = *((GLuint *) value);
-      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = shiftedVal | (temp[i] & 0xff000000);
-         }
-      }
-   }
-   dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
-}
-
-
-/**
- * Wrap the given GL_DEPTH_STENCIL renderbuffer so that it acts like
- * a depth renderbuffer.
- * \return new depth renderbuffer
- */
-struct gl_renderbuffer *
-_mesa_new_z24_renderbuffer_wrapper(struct gl_context *ctx,
-                                   struct gl_renderbuffer *dsrb)
-{
-   struct gl_renderbuffer *z24rb;
-
-   ASSERT(dsrb->Format == MESA_FORMAT_Z24_S8 ||
-          dsrb->Format == MESA_FORMAT_Z24_X8 ||
-          dsrb->Format == MESA_FORMAT_S8_Z24 ||
-          dsrb->Format == MESA_FORMAT_X8_Z24);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT);
-
-   z24rb = ctx->Driver.NewRenderbuffer(ctx, 0);
-   if (!z24rb)
-      return NULL;
-
-   /* NOTE: need to do manual refcounting here */
-   z24rb->Wrapped = dsrb;
-   dsrb->RefCount++;
-
-   z24rb->Name = dsrb->Name;
-   z24rb->RefCount = 0;
-   z24rb->Width = dsrb->Width;
-   z24rb->Height = dsrb->Height;
-   z24rb->RowStride = dsrb->RowStride;
-   z24rb->InternalFormat = GL_DEPTH_COMPONENT24;
-   z24rb->Format = MESA_FORMAT_X8_Z24;
-   z24rb->_BaseFormat = GL_DEPTH_COMPONENT;
-   z24rb->DataType = GL_UNSIGNED_INT;
-   z24rb->Data = NULL;
-   z24rb->Delete = delete_wrapper;
-   z24rb->AllocStorage = alloc_wrapper_storage;
-   z24rb->GetPointer = nop_get_pointer;
-   z24rb->GetRow = get_row_z24;
-   z24rb->GetValues = get_values_z24;
-   z24rb->PutRow = put_row_z24;
-   z24rb->PutRowRGB = NULL;
-   z24rb->PutMonoRow = put_mono_row_z24;
-   z24rb->PutValues = put_values_z24;
-   z24rb->PutMonoValues = put_mono_values_z24;
-
-   return z24rb;
-}
-
-
-static void
-get_row_z32f(struct gl_context *ctx, struct gl_renderbuffer *z32frb, GLuint count,
-             GLint x, GLint y, void *values)
-{
-   struct gl_renderbuffer *dsrb = z32frb->Wrapped;
-   GLfloat temp[MAX_WIDTH*2];
-   GLfloat *dst = (GLfloat *) values;
-   const GLfloat *src = (const GLfloat *) dsrb->GetPointer(ctx, dsrb, x, y);
-   GLuint i;
-   ASSERT(z32frb->DataType == GL_FLOAT);
-   ASSERT(dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   ASSERT(dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8);
-   if (!src) {
-      dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      src = temp;
-   }
-   for (i = 0; i < count; i++) {
-      dst[i] = src[i*2];
-   }
-}
-
-static void
-get_values_z32f(struct gl_context *ctx, struct gl_renderbuffer *z32frb, GLuint count,
-                const GLint x[], const GLint y[], void *values)
-{
-   struct gl_renderbuffer *dsrb = z32frb->Wrapped;
-   GLfloat temp[MAX_WIDTH*2];
-   GLfloat *dst = (GLfloat *) values;
-   GLuint i;
-   ASSERT(z32frb->DataType == GL_FLOAT);
-   ASSERT(dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   ASSERT(dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8);
-   ASSERT(count <= MAX_WIDTH);
-   /* don't bother trying direct access */
-   dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   for (i = 0; i < count; i++) {
-      dst[i] = temp[i*2];
-   }
-}
-
-static void
-put_row_z32f(struct gl_context *ctx, struct gl_renderbuffer *z32frb, GLuint count,
-             GLint x, GLint y, const void *values, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = z32frb->Wrapped;
-   const GLfloat *src = (const GLfloat *) values;
-   GLfloat *dst = (GLfloat *) dsrb->GetPointer(ctx, dsrb, x, y);
-   ASSERT(z32frb->DataType == GL_FLOAT);
-   ASSERT(dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   ASSERT(dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8);
-   if (dst) {
-      /* direct access */
-      GLuint i;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            dst[i*2] = src[i];
-         }
-      }
-   }
-   else {
-      /* get, modify, put */
-      GLfloat temp[MAX_WIDTH*2];
-      GLuint i;
-      dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i*2] = src[i];
-         }
-      }
-      dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
-   }
-}
-
-static void
-put_mono_row_z32f(struct gl_context *ctx, struct gl_renderbuffer *z32frb, GLuint count,
-                  GLint x, GLint y, const void *value, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = z32frb->Wrapped;
-   GLfloat *dst = (GLfloat *) dsrb->GetPointer(ctx, dsrb, x, y);
-   ASSERT(z32frb->DataType == GL_FLOAT);
-   ASSERT(dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   ASSERT(dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8);
-   if (dst) {
-      /* direct access */
-      GLuint i;
-      const GLfloat val = *(GLfloat*)value;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            dst[i*2] = val;
-         }
-      }
-   }
-   else {
-      /* get, modify, put */
-      GLfloat temp[MAX_WIDTH*2];
-      GLuint i;
-      const GLfloat val = *(GLfloat *)value;
-      dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i*2] = val;
-         }
-      }
-      dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
-   }
-}
-
-static void
-put_values_z32f(struct gl_context *ctx, struct gl_renderbuffer *z32frb, GLuint count,
-                const GLint x[], const GLint y[],
-                const void *values, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = z32frb->Wrapped;
-   const GLfloat *src = (const GLfloat *) values;
-   ASSERT(z32frb->DataType == GL_FLOAT);
-   ASSERT(dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   ASSERT(dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8);
-   if (dsrb->GetPointer(ctx, dsrb, 0, 0)) {
-      /* direct access */
-      GLuint i;
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            GLfloat *dst = (GLfloat *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
-            *dst = src[i];
-         }
-      }
-   }
-   else {
-      /* get, modify, put */
-      GLfloat temp[MAX_WIDTH*2];
-      GLuint i;
-      dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i*2] = src[i];
-         }
-      }
-      dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
-   }
-}
-
-static void
-put_mono_values_z32f(struct gl_context *ctx, struct gl_renderbuffer *z32frb,
-                     GLuint count, const GLint x[], const GLint y[],
-                     const void *value, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = z32frb->Wrapped;
-   GLfloat temp[MAX_WIDTH*2];
-   GLuint i;
-   const GLfloat val = *(GLfloat *)value;
-   ASSERT(z32frb->DataType == GL_FLOAT);
-   ASSERT(dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   ASSERT(dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8);
-   /* get, modify, put */
-   dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   for (i = 0; i < count; i++) {
-      if (!mask || mask[i]) {
-         temp[i*2] = val;
-      }
-   }
-   dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
-}
-
-
-/**
- * Wrap the given GL_DEPTH_STENCIL renderbuffer so that it acts like
- * a depth renderbuffer.
- * \return new depth renderbuffer
- */
-struct gl_renderbuffer *
-_mesa_new_z32f_renderbuffer_wrapper(struct gl_context *ctx,
-                                    struct gl_renderbuffer *dsrb)
-{
-   struct gl_renderbuffer *z32frb;
-
-   ASSERT(dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8);
-   ASSERT(dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-
-   z32frb = ctx->Driver.NewRenderbuffer(ctx, 0);
-   if (!z32frb)
-      return NULL;
-
-   /* NOTE: need to do manual refcounting here */
-   z32frb->Wrapped = dsrb;
-   dsrb->RefCount++;
-
-   z32frb->Name = dsrb->Name;
-   z32frb->RefCount = 0;
-   z32frb->Width = dsrb->Width;
-   z32frb->Height = dsrb->Height;
-   z32frb->RowStride = dsrb->RowStride;
-   z32frb->InternalFormat = GL_DEPTH_COMPONENT32F;
-   z32frb->Format = MESA_FORMAT_Z32_FLOAT;
-   z32frb->_BaseFormat = GL_DEPTH_COMPONENT;
-   z32frb->DataType = GL_FLOAT;
-   z32frb->Data = NULL;
-   z32frb->Delete = delete_wrapper;
-   z32frb->AllocStorage = alloc_wrapper_storage;
-   z32frb->GetPointer = nop_get_pointer;
-   z32frb->GetRow = get_row_z32f;
-   z32frb->GetValues = get_values_z32f;
-   z32frb->PutRow = put_row_z32f;
-   z32frb->PutRowRGB = NULL;
-   z32frb->PutMonoRow = put_mono_row_z32f;
-   z32frb->PutValues = put_values_z32f;
-   z32frb->PutMonoValues = put_mono_values_z32f;
-
-   return z32frb;
-}
-
-
-/*======================================================================
- * Stencil wrapper around depth/stencil renderbuffer
- */
-
-static void
-get_row_s8(struct gl_context *ctx, struct gl_renderbuffer *s8rb, GLuint count,
-           GLint x, GLint y, void *values)
-{
-   struct gl_renderbuffer *dsrb = s8rb->Wrapped;
-   GLuint temp[MAX_WIDTH*2], i;
-   GLubyte *dst = (GLubyte *) values;
-   const GLuint *src = (const GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
-   ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT ||
-          dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   if (!src) {
-      dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      src = temp;
-   }
-   if (dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8) {
-      for (i = 0; i < count; i++) {
-         dst[i] = src[i*2+1] & 0xff;
-      }
-   }
-   else if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-      for (i = 0; i < count; i++) {
-         dst[i] = src[i] & 0xff;
-      }
-   }
-   else {
-      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-      for (i = 0; i < count; i++) {
-         dst[i] = src[i] >> 24;
-      }
-   }
-}
-
-static void
-get_values_s8(struct gl_context *ctx, struct gl_renderbuffer *s8rb, GLuint count,
-              const GLint x[], const GLint y[], void *values)
-{
-   struct gl_renderbuffer *dsrb = s8rb->Wrapped;
-   GLuint temp[MAX_WIDTH*2], i;
-   GLubyte *dst = (GLubyte *) values;
-   ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT ||
-          dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   ASSERT(count <= MAX_WIDTH);
-   /* don't bother trying direct access */
-   dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   if (dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8) {
-      for (i = 0; i < count; i++) {
-         dst[i] = temp[i*2+1] & 0xff;
-      }
-   }
-   else if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-      for (i = 0; i < count; i++) {
-         dst[i] = temp[i] & 0xff;
-      }
-   }
-   else {
-      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-      for (i = 0; i < count; i++) {
-         dst[i] = temp[i] >> 24;
-      }
-   }
-}
-
-static void
-put_row_s8(struct gl_context *ctx, struct gl_renderbuffer *s8rb, GLuint count,
-           GLint x, GLint y, const void *values, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = s8rb->Wrapped;
-   const GLubyte *src = (const GLubyte *) values;
-   GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
-   ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT ||
-          dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   if (dst) {
-      /* direct access */
-      GLuint i;
-      if (dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i*2+1] = src[i];
-            }
-         }
-      }
-      else if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i] = (dst[i] & 0xffffff00) | src[i];
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i] = (dst[i] & 0xffffff) | (src[i] << 24);
-            }
-         }
-      }
-   }
-   else {
-      /* get, modify, put */
-      GLuint temp[MAX_WIDTH*2], i;
-      dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      if (dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i*2+1] = src[i];
-            }
-         }
-      }
-      else if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (temp[i] & 0xffffff00) | src[i];
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (temp[i] & 0xffffff) | (src[i] << 24);
-            }
-         }
-      }
-      dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
-   }
-}
-
-static void
-put_mono_row_s8(struct gl_context *ctx, struct gl_renderbuffer *s8rb, GLuint count,
-                GLint x, GLint y, const void *value, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = s8rb->Wrapped;
-   const GLubyte val = *((GLubyte *) value);
-   GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x, y);
-   ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT ||
-          dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   if (dst) {
-      /* direct access */
-      GLuint i;
-      if (dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i*2+1] = val;
-            }
-         }
-      }
-      else if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i] = (dst[i] & 0xffffff00) | val;
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               dst[i] = (dst[i] & 0xffffff) | (val << 24);
-            }
-         }
-      }
-   }
-   else {
-      /* get, modify, put */
-      GLuint temp[MAX_WIDTH*2], i;
-      dsrb->GetRow(ctx, dsrb, count, x, y, temp);
-      if (dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i*2+1] = val;
-            }
-         }
-      }
-      else if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (temp[i] & 0xffffff00) | val;
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (temp[i] & 0xffffff) | (val << 24);
-            }
-         }
-      }
-      dsrb->PutRow(ctx, dsrb, count, x, y, temp, mask);
-   }
-}
-
-static void
-put_values_s8(struct gl_context *ctx, struct gl_renderbuffer *s8rb, GLuint count,
-              const GLint x[], const GLint y[],
-              const void *values, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = s8rb->Wrapped;
-   const GLubyte *src = (const GLubyte *) values;
-   ASSERT(s8rb->DataType == GL_UNSIGNED_BYTE);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT ||
-          dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-   if (dsrb->GetPointer(ctx, dsrb, 0, 0)) {
-      /* direct access */
-      GLuint i;
-      if (dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
-               dst[1] = src[i];
-            }
-         }
-      }
-      else if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
-               *dst = (*dst & 0xffffff00) | src[i];
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               GLuint *dst = (GLuint *) dsrb->GetPointer(ctx, dsrb, x[i], y[i]);
-               *dst = (*dst & 0xffffff) | (src[i] << 24);
-            }
-         }
-      }
-   }
-   else {
-      /* get, modify, put */
-      GLuint temp[MAX_WIDTH*2], i;
-      dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-      if (dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i*2+1] = src[i];
-            }
-         }
-      }
-      else if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (temp[i] & 0xffffff00) | src[i];
-            }
-         }
-      }
-      else {
-         assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-         for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               temp[i] = (temp[i] & 0xffffff) | (src[i] << 24);
-            }
-         }
-      }
-      dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
-   }
-}
-
-static void
-put_mono_values_s8(struct gl_context *ctx, struct gl_renderbuffer *s8rb, GLuint count,
-                   const GLint x[], const GLint y[],
-                   const void *value, const GLubyte *mask)
-{
-   struct gl_renderbuffer *dsrb = s8rb->Wrapped;
-   GLuint temp[MAX_WIDTH*2], i;
-   const GLubyte val = *((GLubyte *) value);
-   /* get, modify, put */
-   dsrb->GetValues(ctx, dsrb, count, x, y, temp);
-   if (dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8) {
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i*2+1] = val;
-         }
-      }
-   }
-   else if (dsrb->Format == MESA_FORMAT_Z24_S8) {
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = (temp[i] & 0xffffff00) | val;
-         }
-      }
-   }
-   else {
-      assert(dsrb->Format == MESA_FORMAT_S8_Z24);
-      for (i = 0; i < count; i++) {
-         if (!mask || mask[i]) {
-            temp[i] = (temp[i] & 0xffffff) | (val << 24);
-         }
-      }
-   }
-   dsrb->PutValues(ctx, dsrb, count, x, y, temp, mask);
-}
-
-
-/**
- * Wrap the given GL_DEPTH_STENCIL renderbuffer so that it acts like
- * a stencil renderbuffer.
- * \return new stencil renderbuffer
- */
-struct gl_renderbuffer *
-_mesa_new_s8_renderbuffer_wrapper(struct gl_context *ctx, struct gl_renderbuffer *dsrb)
-{
-   struct gl_renderbuffer *s8rb;
-
-   ASSERT(dsrb->Format == MESA_FORMAT_Z24_S8 ||
-          dsrb->Format == MESA_FORMAT_S8_Z24 ||
-          dsrb->Format == MESA_FORMAT_Z32_FLOAT_X24S8);
-   ASSERT(dsrb->DataType == GL_UNSIGNED_INT_24_8_EXT ||
-          dsrb->DataType == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
-
-   s8rb = ctx->Driver.NewRenderbuffer(ctx, 0);
-   if (!s8rb)
-      return NULL;
-
-   /* NOTE: need to do manual refcounting here */
-   s8rb->Wrapped = dsrb;
-   dsrb->RefCount++;
-
-   s8rb->Name = dsrb->Name;
-   s8rb->RefCount = 0;
-   s8rb->Width = dsrb->Width;
-   s8rb->Height = dsrb->Height;
-   s8rb->RowStride = dsrb->RowStride;
-   s8rb->InternalFormat = GL_STENCIL_INDEX8_EXT;
-   s8rb->Format = MESA_FORMAT_S8;
-   s8rb->_BaseFormat = GL_STENCIL_INDEX;
-   s8rb->DataType = GL_UNSIGNED_BYTE;
-   s8rb->Data = NULL;
-   s8rb->Delete = delete_wrapper;
-   s8rb->AllocStorage = alloc_wrapper_storage;
-   s8rb->GetPointer = nop_get_pointer;
-   s8rb->GetRow = get_row_s8;
-   s8rb->GetValues = get_values_s8;
-   s8rb->PutRow = put_row_s8;
-   s8rb->PutRowRGB = NULL;
-   s8rb->PutMonoRow = put_mono_row_s8;
-   s8rb->PutValues = put_values_s8;
-   s8rb->PutMonoValues = put_mono_values_s8;
-
-   return s8rb;
-}
-- 
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