/**************************************************************************
*
* Copyright 2006 VMware, Inc.
* 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 VMWARE 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.
*
**************************************************************************/
#include "main/enums.h"
#include "main/imports.h"
#include "main/macros.h"
#include "main/mtypes.h"
#include "main/fbobject.h"
#include "main/framebuffer.h"
#include "main/renderbuffer.h"
#include "main/context.h"
#include "main/teximage.h"
#include "main/image.h"
#include "swrast/swrast.h"
#include "drivers/common/meta.h"
#include "intel_context.h"
#include "intel_batchbuffer.h"
#include "intel_buffers.h"
#include "intel_blit.h"
#include "intel_fbo.h"
#include "intel_mipmap_tree.h"
#include "intel_regions.h"
#include "intel_tex.h"
#define FILE_DEBUG_FLAG DEBUG_FBO
static struct gl_renderbuffer *
intel_new_renderbuffer(struct gl_context * ctx, GLuint name);
struct intel_region*
intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
{
struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
if (irb && irb->mt)
return irb->mt->region;
else
return NULL;
}
/** Called by gl_renderbuffer::Delete() */
static void
intel_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
{
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
assert(irb);
intel_miptree_release(&irb->mt);
_mesa_delete_renderbuffer(ctx, rb);
}
/**
* \see dd_function_table::MapRenderbuffer
*/
static void
intel_map_renderbuffer(struct gl_context *ctx,
struct gl_renderbuffer *rb,
GLuint x, GLuint y, GLuint w, GLuint h,
GLbitfield mode,
GLubyte **out_map,
GLint *out_stride)
{
struct intel_context *intel = intel_context(ctx);
struct swrast_renderbuffer *srb = (struct swrast_renderbuffer *)rb;
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
void *map;
int stride;
if (srb->Buffer) {
/* this is a malloc'd renderbuffer (accum buffer), not an irb */
GLint bpp = _mesa_get_format_bytes(rb->Format);
GLint rowStride = srb->RowStride;
*out_map = (GLubyte *) srb->Buffer + y * rowStride + x * bpp;
*out_stride = rowStride;
return;
}
intel_prepare_render(intel);
/* For a window-system renderbuffer, we need to flip the mapping we receive
* upside-down. So we need to ask for a rectangle on flipped vertically, and
* we then return a pointer to the bottom of it with a negative stride.
*/
if (rb->Name == 0) {
y = rb->Height - y - h;
}
intel_miptree_map(intel, irb->mt, irb->mt_level, irb->mt_layer,
x, y, w, h, mode, &map, &stride);
if (rb->Name == 0) {
map += (h - 1) * stride;
stride = -stride;
}
DBG("%s: rb %d (%s) mt mapped: (%d, %d) (%dx%d) -> %p/%d\n",
__func__, rb->Name, _mesa_get_format_name(rb->Format),
x, y, w, h, map, stride);
*out_map = map;
*out_stride = stride;
}
/**
* \see dd_function_table::UnmapRenderbuffer
*/
static void
intel_unmap_renderbuffer(struct gl_context *ctx,
struct gl_renderbuffer *rb)
{
struct intel_context *intel = intel_context(ctx);
struct swrast_renderbuffer *srb = (struct swrast_renderbuffer *)rb;
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
DBG("%s: rb %d (%s)\n", __func__,
rb->Name, _mesa_get_format_name(rb->Format));
if (srb->Buffer) {
/* this is a malloc'd renderbuffer (accum buffer) */
/* nothing to do */
return;
}
intel_miptree_unmap(intel, irb->mt, irb->mt_level, irb->mt_layer);
}
static mesa_format
intel_renderbuffer_format(struct gl_context * ctx, GLenum internalFormat)
{
struct intel_context *intel = intel_context(ctx);
switch (internalFormat) {
default:
/* Use the same format-choice logic as for textures.
* Renderbuffers aren't any different from textures for us,
* except they're less useful because you can't texture with
* them.
*/
return intel->ctx.Driver.ChooseTextureFormat(ctx, GL_TEXTURE_2D,
internalFormat,
GL_NONE, GL_NONE);
case GL_DEPTH_COMPONENT16:
return MESA_FORMAT_Z_UNORM16;
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32:
return MESA_FORMAT_Z24_UNORM_X8_UINT;
case GL_DEPTH_STENCIL_EXT:
case GL_DEPTH24_STENCIL8_EXT:
case GL_STENCIL_INDEX:
case GL_STENCIL_INDEX1_EXT:
case GL_STENCIL_INDEX4_EXT:
case GL_STENCIL_INDEX8_EXT:
case GL_STENCIL_INDEX16_EXT:
/* These aren't actual texture formats, so force them here. */
return MESA_FORMAT_Z24_UNORM_S8_UINT;
}
}
static GLboolean
intel_alloc_private_renderbuffer_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
struct intel_context *intel = intel_context(ctx);
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
assert(rb->Format != MESA_FORMAT_NONE);
rb->Width = width;
rb->Height = height;
rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
intel_miptree_release(&irb->mt);
DBG("%s: %s: %s (%dx%d)\n", __func__,
_mesa_enum_to_string(internalFormat),
_mesa_get_format_name(rb->Format), width, height);
if (width == 0 || height == 0)
return true;
irb->mt = intel_miptree_create_for_renderbuffer(intel, rb->Format,
width, height);
if (!irb->mt)
return false;
return true;
}
/**
* Called via glRenderbufferStorageEXT() to set the format and allocate
* storage for a user-created renderbuffer.
*/
static GLboolean
intel_alloc_renderbuffer_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat,
GLuint width, GLuint height)
{
rb->Format = intel_renderbuffer_format(ctx, internalFormat);
return intel_alloc_private_renderbuffer_storage(ctx, rb, internalFormat, width, height);
}
static void
intel_image_target_renderbuffer_storage(struct gl_context *ctx,
struct gl_renderbuffer *rb,
void *image_handle)
{
struct intel_context *intel = intel_context(ctx);
struct intel_renderbuffer *irb;
__DRIscreen *screen;
__DRIimage *image;
screen = intel->intelScreen->driScrnPriv;
image = screen->dri2.image->lookupEGLImage(screen, image_handle,
screen->loaderPrivate);
if (image == NULL)
return;
/* __DRIimage is opaque to the core so it has to be checked here */
switch (image->format) {
case MESA_FORMAT_R8G8B8A8_UNORM:
_mesa_error(&intel->ctx, GL_INVALID_OPERATION,
"glEGLImageTargetRenderbufferStorage(unsupported image format");
return;
break;
default:
break;
}
irb = intel_renderbuffer(rb);
intel_miptree_release(&irb->mt);
irb->mt = intel_miptree_create_for_bo(intel,
image->region->bo,
image->format,
image->offset,
image->region->width,
image->region->height,
image->region->pitch,
image->region->tiling);
if (!irb->mt)
return;
rb->InternalFormat = image->internal_format;
rb->Width = image->region->width;
rb->Height = image->region->height;
rb->Format = image->format;
rb->_BaseFormat = _mesa_get_format_base_format(image->format);
rb->NeedsFinishRenderTexture = true;
}
/**
* Called by _mesa_resize_framebuffer() for each hardware renderbuffer when a
* window system framebuffer is resized.
*
* Any actual buffer reallocations for hardware renderbuffers (which would
* have triggered _mesa_resize_framebuffer()) were done by
* intel_process_dri2_buffer().
*/
static GLboolean
intel_alloc_window_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat, GLuint width, GLuint height)
{
assert(rb->Name == 0);
rb->Width = width;
rb->Height = height;
rb->InternalFormat = internalFormat;
return true;
}
/** Dummy function for gl_renderbuffer::AllocStorage() */
static GLboolean
intel_nop_alloc_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
GLenum internalFormat, GLuint width, GLuint height)
{
_mesa_problem(ctx, "intel_op_alloc_storage should never be called.");
return false;
}
/**
* Create a new intel_renderbuffer which corresponds to an on-screen window,
* not a user-created renderbuffer.
*/
struct intel_renderbuffer *
intel_create_renderbuffer(mesa_format format)
{
struct intel_renderbuffer *irb;
struct gl_renderbuffer *rb;
GET_CURRENT_CONTEXT(ctx);
irb = CALLOC_STRUCT(intel_renderbuffer);
if (!irb) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
return NULL;
}
rb = &irb->Base.Base;
_mesa_init_renderbuffer(rb, 0);
rb->ClassID = INTEL_RB_CLASS;
rb->_BaseFormat = _mesa_get_format_base_format(format);
rb->Format = format;
rb->InternalFormat = rb->_BaseFormat;
/* intel-specific methods */
rb->Delete = intel_delete_renderbuffer;
rb->AllocStorage = intel_alloc_window_storage;
return irb;
}
/**
* Private window-system buffers (as opposed to ones shared with the display
* server created with intel_create_renderbuffer()) are most similar in their
* handling to user-created renderbuffers, but they have a resize handler that
* may be called at intel_update_renderbuffers() time.
*/
struct intel_renderbuffer *
intel_create_private_renderbuffer(mesa_format format)
{
struct intel_renderbuffer *irb;
irb = intel_create_renderbuffer(format);
irb->Base.Base.AllocStorage = intel_alloc_private_renderbuffer_storage;
return irb;
}
/**
* Create a new renderbuffer object.
* Typically called via glBindRenderbufferEXT().
*/
static struct gl_renderbuffer *
intel_new_renderbuffer(struct gl_context * ctx, GLuint name)
{
/*struct intel_context *intel = intel_context(ctx); */
struct intel_renderbuffer *irb;
struct gl_renderbuffer *rb;
irb = CALLOC_STRUCT(intel_renderbuffer);
if (!irb) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
return NULL;
}
rb = &irb->Base.Base;
_mesa_init_renderbuffer(rb, name);
rb->ClassID = INTEL_RB_CLASS;
/* intel-specific methods */
rb->Delete = intel_delete_renderbuffer;
rb->AllocStorage = intel_alloc_renderbuffer_storage;
/* span routines set in alloc_storage function */
return rb;
}
/**
* Called via glBindFramebufferEXT().
*/
static void
intel_bind_framebuffer(struct gl_context * ctx, GLenum target,
struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
{
if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) {
intel_draw_buffer(ctx);
}
else {
/* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */
}
}
/**
* Called via glFramebufferRenderbufferEXT().
*/
static void
intel_framebuffer_renderbuffer(struct gl_context * ctx,
struct gl_framebuffer *fb,
GLenum attachment, struct gl_renderbuffer *rb)
{
DBG("Intel FramebufferRenderbuffer %u %u\n", fb->Name, rb ? rb->Name : 0);
_mesa_FramebufferRenderbuffer_sw(ctx, fb, attachment, rb);
intel_draw_buffer(ctx);
}
static bool
intel_renderbuffer_update_wrapper(struct intel_context *intel,
struct intel_renderbuffer *irb,
struct gl_texture_image *image,
uint32_t layer)
{
struct gl_renderbuffer *rb = &irb->Base.Base;
struct intel_texture_image *intel_image = intel_texture_image(image);
struct intel_mipmap_tree *mt = intel_image->mt;
int level = image->Level;
rb->AllocStorage = intel_nop_alloc_storage;
intel_miptree_check_level_layer(mt, level, layer);
irb->mt_level = level;
irb->mt_layer = layer;
intel_miptree_reference(&irb->mt, mt);
intel_renderbuffer_set_draw_offset(irb);
return true;
}
void
intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb)
{
unsigned int dst_x, dst_y;
/* compute offset of the particular 2D image within the texture region */
intel_miptree_get_image_offset(irb->mt,
irb->mt_level,
irb->mt_layer,
&dst_x, &dst_y);
irb->draw_x = dst_x;
irb->draw_y = dst_y;
}
/**
* Called by glFramebufferTexture[123]DEXT() (and other places) to
* prepare for rendering into texture memory. This might be called
* many times to choose different texture levels, cube faces, etc
* before intel_finish_render_texture() is ever called.
*/
static void
intel_render_texture(struct gl_context * ctx,
struct gl_framebuffer *fb,
struct gl_renderbuffer_attachment *att)
{
struct intel_context *intel = intel_context(ctx);
struct gl_renderbuffer *rb = att->Renderbuffer;
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
struct gl_texture_image *image = rb->TexImage;
struct intel_texture_image *intel_image = intel_texture_image(image);
struct intel_mipmap_tree *mt = intel_image->mt;
int layer;
(void) fb;
if (att->CubeMapFace > 0) {
assert(att->Zoffset == 0);
layer = att->CubeMapFace;
} else {
layer = att->Zoffset;
}
if (!intel_image->mt) {
/* Fallback on drawing to a texture that doesn't have a miptree
* (has a border, width/height 0, etc.)
*/
_swrast_render_texture(ctx, fb, att);
return;
}
intel_miptree_check_level_layer(mt, att->TextureLevel, layer);
if (!intel_renderbuffer_update_wrapper(intel, irb, image, layer)) {
_swrast_render_texture(ctx, fb, att);
return;
}
DBG("Begin render %s texture tex=%u w=%d h=%d d=%d refcount=%d\n",
_mesa_get_format_name(image->TexFormat),
att->Texture->Name, image->Width, image->Height, image->Depth,
rb->RefCount);
/* update drawing region, etc */
intel_draw_buffer(ctx);
}
/**
* Called by Mesa when rendering to a texture is done.
*/
static void
intel_finish_render_texture(struct gl_context * ctx, struct gl_renderbuffer *rb)
{
struct intel_context *intel = intel_context(ctx);
DBG("Finish render %s texture\n", _mesa_get_format_name(rb->Format));
/* Since we've (probably) rendered to the texture and will (likely) use
* it in the texture domain later on in this batchbuffer, flush the
* batch. Once again, we wish for a domain tracker in libdrm to cover
* usage inside of a batchbuffer like GEM does in the kernel.
*/
intel_batchbuffer_emit_mi_flush(intel);
}
#define fbo_incomplete(fb, ...) do { \
static GLuint msg_id = 0; \
if (unlikely(ctx->Const.ContextFlags & GL_CONTEXT_FLAG_DEBUG_BIT)) { \
_mesa_gl_debug(ctx, &msg_id, \
MESA_DEBUG_SOURCE_API, \
MESA_DEBUG_TYPE_OTHER, \
MESA_DEBUG_SEVERITY_MEDIUM, \
__VA_ARGS__); \
} \
DBG(__VA_ARGS__); \
fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED; \
} while (0)
/**
* Do additional "completeness" testing of a framebuffer object.
*/
static void
intel_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
{
struct intel_context *intel = intel_context(ctx);
struct intel_renderbuffer *depthRb =
intel_get_renderbuffer(fb, BUFFER_DEPTH);
struct intel_renderbuffer *stencilRb =
intel_get_renderbuffer(fb, BUFFER_STENCIL);
struct intel_mipmap_tree *depth_mt = NULL, *stencil_mt = NULL;
int i;
DBG("%s() on fb %p (%s)\n", __func__,
fb, (fb == ctx->DrawBuffer ? "drawbuffer" :
(fb == ctx->ReadBuffer ? "readbuffer" : "other buffer")));
if (depthRb)
depth_mt = depthRb->mt;
if (stencilRb)
stencil_mt = stencilRb->mt;
if (depth_mt && stencil_mt) {
/* Make sure that the depth and stencil buffers are actually the same
* slice of the same miptree, since we only support packed
* depth/stencil.
*/
if (depth_mt == stencil_mt) {
if (depthRb->mt_level != stencilRb->mt_level ||
depthRb->mt_layer != stencilRb->mt_layer) {
fbo_incomplete(fb,
"FBO incomplete: depth image level/layer %d/%d != "
"stencil image %d/%d\n",
depthRb->mt_level,
depthRb->mt_layer,
stencilRb->mt_level,
stencilRb->mt_layer);
}
} else {
fbo_incomplete(fb, "FBO incomplete: separate stencil unsupported\n");
}
}
for (i = 0; i < ARRAY_SIZE(fb->Attachment); i++) {
struct gl_renderbuffer *rb;
struct intel_renderbuffer *irb;
if (fb->Attachment[i].Type == GL_NONE)
continue;
/* A supported attachment will have a Renderbuffer set either
* from being a Renderbuffer or being a texture that got the
* intel_wrap_texture() treatment.
*/
rb = fb->Attachment[i].Renderbuffer;
if (rb == NULL) {
fbo_incomplete(fb, "FBO incomplete: attachment without "
"renderbuffer\n");
continue;
}
if (fb->Attachment[i].Type == GL_TEXTURE) {
if (rb->TexImage->Border) {
fbo_incomplete(fb, "FBO incomplete: texture with border\n");
continue;
}
}
irb = intel_renderbuffer(rb);
if (irb == NULL) {
fbo_incomplete(fb, "FBO incomplete: software rendering "
"renderbuffer\n");
continue;
}
if (!intel->vtbl.render_target_supported(intel, rb)) {
fbo_incomplete(fb, "FBO incomplete: Unsupported HW "
"texture/renderbuffer format attached: %s\n",
_mesa_get_format_name(intel_rb_format(irb)));
}
}
}
/**
* Try to do a glBlitFramebuffer using glCopyTexSubImage2D
* We can do this when the dst renderbuffer is actually a texture and
* there is no scaling, mirroring or scissoring.
*
* \return new buffer mask indicating the buffers left to blit using the
* normal path.
*/
static GLbitfield
intel_blit_framebuffer_with_blitter(struct gl_context *ctx,
const struct gl_framebuffer *readFb,
const struct gl_framebuffer *drawFb,
GLint srcX0, GLint srcY0,
GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0,
GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
struct intel_context *intel = intel_context(ctx);
/* Sync up the state of window system buffers. We need to do this before
* we go looking for the buffers.
*/
intel_prepare_render(intel);
if (mask & GL_COLOR_BUFFER_BIT) {
GLint i;
struct gl_renderbuffer *src_rb = readFb->_ColorReadBuffer;
struct intel_renderbuffer *src_irb = intel_renderbuffer(src_rb);
if (!src_irb) {
perf_debug("glBlitFramebuffer(): missing src renderbuffer. "
"Falling back to software rendering.\n");
return mask;
}
/* If the source and destination are the same size with no mirroring,
* the rectangles are within the size of the texture and there is no
* scissor, then we can probably use the blit engine.
*/
if (!(srcX0 - srcX1 == dstX0 - dstX1 &&
srcY0 - srcY1 == dstY0 - dstY1 &&
srcX1 >= srcX0 &&
srcY1 >= srcY0 &&
srcX0 >= 0 && srcX1 <= readFb->Width &&
srcY0 >= 0 && srcY1 <= readFb->Height &&
dstX0 >= 0 && dstX1 <= drawFb->Width &&
dstY0 >= 0 && dstY1 <= drawFb->Height &&
!ctx->Scissor.EnableFlags)) {
perf_debug("glBlitFramebuffer(): non-1:1 blit. "
"Falling back to software rendering.\n");
return mask;
}
/* Blit to all active draw buffers. We don't do any pre-checking,
* because we assume that copying to MRTs is rare, and failure midway
* through copying is even more rare. Even if it was to occur, it's
* safe to let meta start the copy over from scratch, because
* glBlitFramebuffer completely overwrites the destination pixels, and
* results are undefined if any destination pixels have a dependency on
* source pixels.
*/
for (i = 0; i < drawFb->_NumColorDrawBuffers; i++) {
struct gl_renderbuffer *dst_rb = drawFb->_ColorDrawBuffers[i];
struct intel_renderbuffer *dst_irb = intel_renderbuffer(dst_rb);
if (!dst_irb) {
perf_debug("glBlitFramebuffer(): missing dst renderbuffer. "
"Falling back to software rendering.\n");
return mask;
}
mesa_format src_format = _mesa_get_srgb_format_linear(src_rb->Format);
mesa_format dst_format = _mesa_get_srgb_format_linear(dst_rb->Format);
if (src_format != dst_format) {
perf_debug("glBlitFramebuffer(): unsupported blit from %s to %s. "
"Falling back to software rendering.\n",
_mesa_get_format_name(src_format),
_mesa_get_format_name(dst_format));
return mask;
}
if (!intel_miptree_blit(intel,
src_irb->mt,
src_irb->mt_level, src_irb->mt_layer,
srcX0, srcY0, src_rb->Name == 0,
dst_irb->mt,
dst_irb->mt_level, dst_irb->mt_layer,
dstX0, dstY0, dst_rb->Name == 0,
dstX1 - dstX0, dstY1 - dstY0, GL_COPY)) {
perf_debug("glBlitFramebuffer(): unknown blit failure. "
"Falling back to software rendering.\n");
return mask;
}
}
mask &= ~GL_COLOR_BUFFER_BIT;
}
return mask;
}
static void
intel_blit_framebuffer(struct gl_context *ctx,
struct gl_framebuffer *readFb,
struct gl_framebuffer *drawFb,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
/* Try using the BLT engine. */
mask = intel_blit_framebuffer_with_blitter(ctx, readFb, drawFb,
srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1,
mask, filter);
if (mask == 0x0)
return;
_mesa_meta_and_swrast_BlitFramebuffer(ctx, readFb, drawFb,
srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1,
mask, filter);
}
/**
* Do one-time context initializations related to GL_EXT_framebuffer_object.
* Hook in device driver functions.
*/
void
intel_fbo_init(struct intel_context *intel)
{
intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer;
intel->ctx.Driver.MapRenderbuffer = intel_map_renderbuffer;
intel->ctx.Driver.UnmapRenderbuffer = intel_unmap_renderbuffer;
intel->ctx.Driver.BindFramebuffer = intel_bind_framebuffer;
intel->ctx.Driver.FramebufferRenderbuffer = intel_framebuffer_renderbuffer;
intel->ctx.Driver.RenderTexture = intel_render_texture;
intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
intel->ctx.Driver.BlitFramebuffer = intel_blit_framebuffer;
intel->ctx.Driver.EGLImageTargetRenderbufferStorage =
intel_image_target_renderbuffer_storage;
}