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diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
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+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+
+/**
+ * Framebuffer/renderbuffer functions.
+ *
+ * \author Brian Paul
+ */
+
+
+#include "main/imports.h"
+#include "main/context.h"
+#include "main/fbobject.h"
+#include "main/framebuffer.h"
+#include "main/renderbuffer.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_winsys.h"
+#include "st_context.h"
+#include "st_cb_fbo.h"
+#include "st_cb_texture.h"
+#include "st_format.h"
+#include "st_public.h"
+#include "st_texture.h"
+
+
+
+/**
+ * Compute the renderbuffer's Red/Green/EtcBit fields from the pipe format.
+ */
+static int
+init_renderbuffer_bits(struct st_renderbuffer *strb,
+ enum pipe_format pipeFormat)
+{
+ struct pipe_format_info info;
+
+ if (!st_get_format_info( pipeFormat, &info )) {
+ assert( 0 );
+ }
+
+ strb->Base._ActualFormat = info.base_format;
+ strb->Base.RedBits = info.red_bits;
+ strb->Base.GreenBits = info.green_bits;
+ strb->Base.BlueBits = info.blue_bits;
+ strb->Base.AlphaBits = info.alpha_bits;
+ strb->Base.DepthBits = info.depth_bits;
+ strb->Base.StencilBits = info.stencil_bits;
+ strb->Base.DataType = st_format_datatype(pipeFormat);
+
+ return info.size;
+}
+
+/**
+ * gl_renderbuffer::AllocStorage()
+ * This is called to allocate the original drawing surface, and
+ * during window resize.
+ */
+static GLboolean
+st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
+ GLenum internalFormat,
+ GLuint width, GLuint height)
+{
+ struct pipe_context *pipe = ctx->st->pipe;
+ struct st_renderbuffer *strb = st_renderbuffer(rb);
+ struct pipe_texture template;
+ unsigned surface_usage;
+
+ /* Free the old surface and texture
+ */
+ pipe_surface_reference( &strb->surface, NULL );
+ pipe_texture_reference( &strb->texture, NULL );
+
+
+ memset(&template, 0, sizeof(template));
+
+ if (strb->format != PIPE_FORMAT_NONE) {
+ template.format = strb->format;
+ }
+ else {
+ template.format = st_choose_renderbuffer_format(pipe, internalFormat);
+ }
+
+ strb->Base.Width = width;
+ strb->Base.Height = height;
+ init_renderbuffer_bits(strb, template.format);
+
+ template.target = PIPE_TEXTURE_2D;
+ template.compressed = 0;
+ pf_get_block(template.format, &template.block);
+ template.width[0] = width;
+ template.height[0] = height;
+ template.depth[0] = 1;
+ template.last_level = 0;
+ template.nr_samples = rb->Samples;
+
+ if (pf_is_depth_stencil(template.format)) {
+ template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
+ }
+ else {
+ template.tex_usage = (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
+ PIPE_TEXTURE_USAGE_RENDER_TARGET);
+ }
+
+
+ /* Probably need dedicated flags for surface usage too:
+ */
+ surface_usage = (PIPE_BUFFER_USAGE_GPU_READ |
+ PIPE_BUFFER_USAGE_GPU_WRITE);
+#if 0
+ PIPE_BUFFER_USAGE_CPU_READ |
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+#endif
+
+ strb->texture = pipe->screen->texture_create( pipe->screen,
+ &template );
+
+ /* Special path for accum buffers.
+ *
+ * Try a different surface format. Since accum buffers are s/w
+ * only for now, the surface pixel format doesn't really matter,
+ * only that the buffer is large enough.
+ */
+ if (!strb->texture && template.format == DEFAULT_ACCUM_PIPE_FORMAT)
+ {
+ /* Actually, just setting this usage value should be sufficient
+ * to tell the driver to go ahead and allocate the buffer, even
+ * if HW doesn't support the format.
+ */
+ template.tex_usage = 0;
+ surface_usage = (PIPE_BUFFER_USAGE_CPU_READ |
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+
+ strb->texture = pipe->screen->texture_create( pipe->screen,
+ &template );
+
+ }
+
+ if (!strb->texture)
+ return FALSE;
+
+ strb->surface = pipe->screen->get_tex_surface( pipe->screen,
+ strb->texture,
+ 0, 0, 0,
+ surface_usage );
+
+ assert(strb->surface->texture);
+ assert(strb->surface->buffer);
+ assert(strb->surface->format);
+ assert(strb->surface->block.size);
+ assert(strb->surface->block.width);
+ assert(strb->surface->block.height);
+ assert(strb->surface->width == width);
+ assert(strb->surface->height == height);
+ assert(strb->surface->stride);
+
+
+ return strb->surface != NULL;
+}
+
+
+/**
+ * gl_renderbuffer::Delete()
+ */
+static void
+st_renderbuffer_delete(struct gl_renderbuffer *rb)
+{
+ struct st_renderbuffer *strb = st_renderbuffer(rb);
+ ASSERT(strb);
+ pipe_surface_reference(&strb->surface, NULL);
+ pipe_texture_reference(&strb->texture, NULL);
+ free(strb);
+}
+
+
+/**
+ * gl_renderbuffer::GetPointer()
+ */
+static void *
+null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
+ GLint x, GLint y)
+{
+ /* By returning NULL we force all software rendering to go through
+ * the span routines.
+ */
+#if 0
+ assert(0); /* Should never get called with softpipe */
+#endif
+ return NULL;
+}
+
+
+/**
+ * Called via ctx->Driver.NewFramebuffer()
+ */
+static struct gl_framebuffer *
+st_new_framebuffer(GLcontext *ctx, GLuint name)
+{
+ /* XXX not sure we need to subclass gl_framebuffer for pipe */
+ return _mesa_new_framebuffer(ctx, name);
+}
+
+
+/**
+ * Called via ctx->Driver.NewRenderbuffer()
+ */
+static struct gl_renderbuffer *
+st_new_renderbuffer(GLcontext *ctx, GLuint name)
+{
+ struct st_renderbuffer *strb = CALLOC_STRUCT(st_renderbuffer);
+ if (strb) {
+ _mesa_init_renderbuffer(&strb->Base, name);
+ strb->Base.Delete = st_renderbuffer_delete;
+ strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
+ strb->Base.GetPointer = null_get_pointer;
+ strb->format = PIPE_FORMAT_NONE;
+ return &strb->Base;
+ }
+ return NULL;
+}
+
+
+/**
+ * Allocate a renderbuffer for a an on-screen window (not a user-created
+ * renderbuffer). The window system code determines the format.
+ */
+struct gl_renderbuffer *
+st_new_renderbuffer_fb(enum pipe_format format, int samples)
+{
+ struct st_renderbuffer *strb;
+
+ strb = CALLOC_STRUCT(st_renderbuffer);
+ if (!strb) {
+ _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
+ return NULL;
+ }
+
+ _mesa_init_renderbuffer(&strb->Base, 0);
+ strb->Base.ClassID = 0x4242; /* just a unique value */
+ strb->Base.Samples = samples;
+ strb->format = format;
+
+ switch (format) {
+ case PIPE_FORMAT_A8R8G8B8_UNORM:
+ case PIPE_FORMAT_B8G8R8A8_UNORM:
+ case PIPE_FORMAT_X8R8G8B8_UNORM:
+ case PIPE_FORMAT_B8G8R8X8_UNORM:
+ case PIPE_FORMAT_A1R5G5B5_UNORM:
+ case PIPE_FORMAT_A4R4G4B4_UNORM:
+ case PIPE_FORMAT_R5G6B5_UNORM:
+ strb->Base.InternalFormat = GL_RGBA;
+ strb->Base._BaseFormat = GL_RGBA;
+ break;
+ case PIPE_FORMAT_Z16_UNORM:
+ strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
+ strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ break;
+ case PIPE_FORMAT_Z32_UNORM:
+ strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
+ strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ break;
+ case PIPE_FORMAT_S8Z24_UNORM:
+ case PIPE_FORMAT_Z24S8_UNORM:
+ case PIPE_FORMAT_X8Z24_UNORM:
+ case PIPE_FORMAT_Z24X8_UNORM:
+ strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
+ strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
+ break;
+ case PIPE_FORMAT_S8_UNORM:
+ strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
+ strb->Base._BaseFormat = GL_STENCIL_INDEX;
+ break;
+ case DEFAULT_ACCUM_PIPE_FORMAT: /*PIPE_FORMAT_R16G16B16A16_SNORM*/
+ strb->Base.InternalFormat = GL_RGBA16;
+ strb->Base._BaseFormat = GL_RGBA;
+ break;
+ default:
+ _mesa_problem(NULL,
+ "Unexpected format in st_new_renderbuffer_fb");
+ return NULL;
+ }
+
+ /* st-specific methods */
+ strb->Base.Delete = st_renderbuffer_delete;
+ strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
+ strb->Base.GetPointer = null_get_pointer;
+
+ /* surface is allocated in st_renderbuffer_alloc_storage() */
+ strb->surface = NULL;
+
+ return &strb->Base;
+}
+
+
+
+
+/**
+ * Called via ctx->Driver.BindFramebufferEXT().
+ */
+static void
+st_bind_framebuffer(GLcontext *ctx, GLenum target,
+ struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
+{
+
+}
+
+/**
+ * Called by ctx->Driver.FramebufferRenderbuffer
+ */
+static void
+st_framebuffer_renderbuffer(GLcontext *ctx,
+ struct gl_framebuffer *fb,
+ GLenum attachment,
+ struct gl_renderbuffer *rb)
+{
+ /* XXX no need for derivation? */
+ _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
+}
+
+
+/**
+ * Called by ctx->Driver.RenderTexture
+ */
+static void
+st_render_texture(GLcontext *ctx,
+ struct gl_framebuffer *fb,
+ struct gl_renderbuffer_attachment *att)
+{
+ struct st_renderbuffer *strb;
+ struct gl_renderbuffer *rb;
+ struct pipe_texture *pt;
+ struct st_texture_object *stObj;
+ const struct gl_texture_image *texImage =
+ att->Texture->Image[att->CubeMapFace][att->TextureLevel];
+
+
+ assert(!att->Renderbuffer);
+
+ /* create new renderbuffer which wraps the texture image */
+ rb = st_new_renderbuffer(ctx, 0);
+ if (!rb) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
+ return;
+ }
+
+ _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
+ assert(rb->RefCount == 1);
+ rb->AllocStorage = NULL; /* should not get called */
+ strb = st_renderbuffer(rb);
+
+ /* get the texture for the texture object */
+ stObj = st_texture_object(att->Texture);
+
+ /* point renderbuffer at texobject */
+ strb->rtt = stObj;
+ strb->rtt_level = att->TextureLevel;
+ strb->rtt_face = att->CubeMapFace;
+ strb->rtt_slice = att->Zoffset;
+
+ rb->Width = texImage->Width2;
+ rb->Height = texImage->Height2;
+ /*printf("***** render to texture level %d: %d x %d\n", att->TextureLevel, rb->Width, rb->Height);*/
+
+ pt = st_get_texobj_texture(att->Texture);
+ assert(pt);
+ /*printf("***** pipe texture %d x %d\n", pt->width[0], pt->height[0]);*/
+
+ pipe_texture_reference( &strb->texture, pt );
+
+ pipe_surface_reference(&strb->surface, NULL);
+
+ /* the new surface will be created during framebuffer validation */
+
+ init_renderbuffer_bits(strb, pt->format);
+
+ /*
+ printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p %d x %d\n",
+ att->Texture, pt, strb->surface, rb->Width, rb->Height);
+ */
+
+ /* Invalidate buffer state so that the pipe's framebuffer state
+ * gets updated.
+ * That's where the new renderbuffer (which we just created) gets
+ * passed to the pipe as a (color/depth) render target.
+ */
+ st_invalidate_state(ctx, _NEW_BUFFERS);
+}
+
+
+/**
+ * Called via ctx->Driver.FinishRenderTexture.
+ */
+static void
+st_finish_render_texture(GLcontext *ctx,
+ struct gl_renderbuffer_attachment *att)
+{
+ struct pipe_screen *screen = ctx->st->pipe->screen;
+ struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
+
+ if (!strb)
+ return;
+
+ ctx->st->pipe->flush(ctx->st->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+ if (strb->surface)
+ screen->tex_surface_release( screen, &strb->surface );
+
+ strb->rtt = NULL;
+
+ /*
+ printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
+ */
+
+ _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
+
+ /* restore previous framebuffer state */
+ st_invalidate_state(ctx, _NEW_BUFFERS);
+}
+
+
+
+void st_init_fbo_functions(struct dd_function_table *functions)
+{
+ functions->NewFramebuffer = st_new_framebuffer;
+ functions->NewRenderbuffer = st_new_renderbuffer;
+ functions->BindFramebuffer = st_bind_framebuffer;
+ functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
+ functions->RenderTexture = st_render_texture;
+ functions->FinishRenderTexture = st_finish_render_texture;
+ /* no longer needed by core Mesa, drivers handle resizes...
+ functions->ResizeBuffers = st_resize_buffers;
+ */
+}
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