i915: Fork the shared code from i965.

Of this 15000 lines of code in intel/, we've identified 4000 lines that
are trivially unnecessary for i915, and another 1000 that are pointless for
i965, and expect to find more as time goes on.  Split the i915 driver off,
so that we can continue active development on i965 without worrying about
breaking i915.

Acked-by: Kenneth Graunke <[email protected]>
Acked-by: Chad Versace <[email protected]>
Acked-by: Adam Jackson <[email protected]>
(and I hear second hand that idr is OK with it, too)

1 files changed, 949 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i915/intel_fbo.c b/src/mesa/drivers/dri/i915/intel_fbo.c
index a19f86dcc57..d16523bbbf6 120000..100644
--- a/src/mesa/drivers/dri/i915/intel_fbo.c
+++ b/src/mesa/drivers/dri/i915/intel_fbo.c
@@ -1 +1,949 @@
-../intel/intel_fbo.c
\ No newline at end of file
+/**************************************************************************
+ * 
+ * Copyright 2006 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.
+ * 
+ **************************************************************************/
+
+
+#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"
+#ifndef I915
+#include "brw_context.h"
+#endif
+
+#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) {
+      if (attIndex == BUFFER_STENCIL && irb->mt->stencil_mt)
+	 return irb->mt->stencil_mt->region;
+      else
+	 return irb->mt->region;
+   } else
+      return NULL;
+}
+
+/**
+ * Create a new framebuffer object.
+ */
+static struct gl_framebuffer *
+intel_new_framebuffer(struct gl_context * ctx, GLuint name)
+{
+   /* Only drawable state in intel_framebuffer at this time, just use Mesa's
+    * class
+    */
+   return _mesa_new_framebuffer(ctx, name);
+}
+
+
+/** 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",
+       __FUNCTION__, 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", __FUNCTION__,
+       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);
+}
+
+
+/**
+ * Round up the requested multisample count to the next supported sample size.
+ */
+unsigned
+intel_quantize_num_samples(struct intel_screen *intel, unsigned num_samples)
+{
+   switch (intel->gen) {
+   case 6:
+      /* Gen6 supports only 4x multisampling. */
+      if (num_samples > 0)
+         return 4;
+      else
+         return 0;
+   case 7:
+      /* Gen7 supports 4x and 8x multisampling. */
+      if (num_samples > 4)
+         return 8;
+      else if (num_samples > 0)
+         return 4;
+      else
+         return 0;
+      return 0;
+   default:
+      /* MSAA unsupported. */
+      return 0;
+   }
+}
+
+
+/**
+ * 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)
+{
+   struct intel_context *intel = intel_context(ctx);
+   struct intel_screen *screen = intel->intelScreen;
+   struct intel_renderbuffer *irb = intel_renderbuffer(rb);
+   rb->NumSamples = intel_quantize_num_samples(screen, rb->NumSamples);
+
+   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.
+       */
+      rb->Format = intel->ctx.Driver.ChooseTextureFormat(ctx, GL_TEXTURE_2D,
+							 internalFormat,
+							 GL_NONE, GL_NONE);
+      break;
+   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. */
+      if (intel->has_separate_stencil) {
+	 rb->Format = MESA_FORMAT_S8;
+      } else {
+	 assert(!intel->must_use_separate_stencil);
+	 rb->Format = MESA_FORMAT_S8_Z24;
+      }
+      break;
+   }
+
+   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", __FUNCTION__,
+       _mesa_lookup_enum_by_nr(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,
+                                                   rb->NumSamples);
+   if (!irb->mt)
+      return false;
+
+   return true;
+}
+
+
+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_RGBA8888_REV:
+      _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_base_fbo_format(&intel->ctx,
+					   image->internal_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.
+ *
+ * \param num_samples must be quantized.
+ */
+struct intel_renderbuffer *
+intel_create_renderbuffer(gl_format format, unsigned num_samples)
+{
+   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;
+   rb->NumSamples = num_samples;
+
+   /* 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.
+ *
+ * \param num_samples must be quantized.
+ */
+struct intel_renderbuffer *
+intel_create_private_renderbuffer(gl_format format, unsigned num_samples)
+{
+   struct intel_renderbuffer *irb;
+
+   irb = intel_create_renderbuffer(format, num_samples);
+   irb->Base.Base.AllocStorage = intel_alloc_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_framebuffer_renderbuffer(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->Depth = image->Depth;
+
+   rb->AllocStorage = intel_nop_alloc_storage;
+
+   intel_miptree_check_level_layer(mt, level, layer);
+   irb->mt_level = level;
+
+   switch (mt->msaa_layout) {
+      case INTEL_MSAA_LAYOUT_UMS:
+      case INTEL_MSAA_LAYOUT_CMS:
+         irb->mt_layer = layer * mt->num_samples;
+         break;
+
+      default:
+         irb->mt_layer = layer;
+   }
+
+   intel_miptree_reference(&irb->mt, mt);
+
+   intel_renderbuffer_set_draw_offset(irb);
+
+   if (mt->hiz_mt == NULL &&
+       intel->vtbl.is_hiz_depth_format(intel, rb->Format)) {
+      intel_miptree_alloc_hiz(intel, mt);
+      if (!mt->hiz_mt)
+	 return false;
+   }
+
+   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_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", __FUNCTION__,
+       fb, (fb == ctx->DrawBuffer ? "drawbuffer" :
+	    (fb == ctx->ReadBuffer ? "readbuffer" : "other buffer")));
+
+   if (depthRb)
+      depth_mt = depthRb->mt;
+   if (stencilRb) {
+      stencil_mt = stencilRb->mt;
+      if (stencil_mt->stencil_mt)
+	 stencil_mt = stencil_mt->stencil_mt;
+   }
+
+   if (depth_mt && stencil_mt) {
+      if (depth_mt == stencil_mt) {
+	 /* For true packed depth/stencil (not faked on prefers-separate-stencil
+	  * hardware) we need to be sure they're the same level/layer, since
+	  * we'll be emitting a single packet describing the packed setup.
+	  */
+	 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 {
+	 if (!intel->has_separate_stencil) {
+	    fbo_incomplete(fb, "FBO incomplete: separate stencil "
+                           "unsupported\n");
+	 }
+	 if (stencil_mt->format != MESA_FORMAT_S8) {
+	    fbo_incomplete(fb, "FBO incomplete: separate stencil is %s "
+                           "instead of S8\n",
+                           _mesa_get_format_name(stencil_mt->format));
+	 }
+	 if (intel->gen < 7 && !intel_renderbuffer_has_hiz(depthRb)) {
+	    /* Before Gen7, separate depth and stencil buffers can be used
+	     * only if HiZ is enabled. From the Sandybridge PRM, Volume 2,
+	     * Part 1, Bit 3DSTATE_DEPTH_BUFFER.SeparateStencilBufferEnable:
+	     *     [DevSNB]: This field must be set to the same value (enabled
+	     *     or disabled) as Hierarchical Depth Buffer Enable.
+	     */
+	    fbo_incomplete(fb, "FBO incomplete: separate stencil "
+                           "without HiZ\n");
+	 }
+      }
+   }
+
+   for (i = 0; i < Elements(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,
+                                    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);
+
+   if (mask & GL_COLOR_BUFFER_BIT) {
+      GLint i;
+      const struct gl_framebuffer *drawFb = ctx->DrawBuffer;
+      const struct gl_framebuffer *readFb = ctx->ReadBuffer;
+      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.Enabled)) {
+         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 < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
+         struct gl_renderbuffer *dst_rb = ctx->DrawBuffer->_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;
+         }
+
+         gl_format src_format = _mesa_get_srgb_format_linear(src_rb->Format);
+         gl_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,
+                       GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+                       GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+                       GLbitfield mask, GLenum filter)
+{
+#ifndef I915
+   mask = brw_blorp_framebuffer(intel_context(ctx),
+                                srcX0, srcY0, srcX1, srcY1,
+                                dstX0, dstY0, dstX1, dstY1,
+                                mask, filter);
+   if (mask == 0x0)
+      return;
+#endif
+
+   /* Try using the BLT engine. */
+   mask = intel_blit_framebuffer_with_blitter(ctx,
+                                              srcX0, srcY0, srcX1, srcY1,
+                                              dstX0, dstY0, dstX1, dstY1,
+                                              mask, filter);
+   if (mask == 0x0)
+      return;
+
+
+   _mesa_meta_BlitFramebuffer(ctx,
+                              srcX0, srcY0, srcX1, srcY1,
+                              dstX0, dstY0, dstX1, dstY1,
+                              mask, filter);
+}
+
+/**
+ * This is a no-op except on multisample buffers shared with DRI2.
+ */
+void
+intel_renderbuffer_set_needs_downsample(struct intel_renderbuffer *irb)
+{
+   if (irb->mt && irb->mt->singlesample_mt)
+      irb->mt->need_downsample = true;
+}
+
+/**
+ * Does the renderbuffer have hiz enabled?
+ */
+bool
+intel_renderbuffer_has_hiz(struct intel_renderbuffer *irb)
+{
+   return intel_miptree_slice_has_hiz(irb->mt, irb->mt_level, irb->mt_layer);
+}
+
+void
+intel_renderbuffer_set_needs_hiz_resolve(struct intel_renderbuffer *irb)
+{
+   if (irb->mt) {
+      intel_miptree_slice_set_needs_hiz_resolve(irb->mt,
+                                                irb->mt_level,
+                                                irb->mt_layer);
+   }
+}
+
+void
+intel_renderbuffer_set_needs_depth_resolve(struct intel_renderbuffer *irb)
+{
+   if (irb->mt) {
+      intel_miptree_slice_set_needs_depth_resolve(irb->mt,
+                                                  irb->mt_level,
+                                                  irb->mt_layer);
+   }
+}
+
+bool
+intel_renderbuffer_resolve_hiz(struct intel_context *intel,
+			       struct intel_renderbuffer *irb)
+{
+   if (irb->mt)
+      return intel_miptree_slice_resolve_hiz(intel,
+                                             irb->mt,
+                                             irb->mt_level,
+                                             irb->mt_layer);
+
+   return false;
+}
+
+bool
+intel_renderbuffer_resolve_depth(struct intel_context *intel,
+				 struct intel_renderbuffer *irb)
+{
+   if (irb->mt)
+      return intel_miptree_slice_resolve_depth(intel,
+                                               irb->mt,
+                                               irb->mt_level,
+                                               irb->mt_layer);
+
+   return false;
+}
+
+void
+intel_renderbuffer_move_to_temp(struct intel_context *intel,
+                                struct intel_renderbuffer *irb,
+                                bool invalidate)
+{
+   struct gl_renderbuffer *rb =&irb->Base.Base;
+   struct intel_texture_image *intel_image = intel_texture_image(rb->TexImage);
+   struct intel_mipmap_tree *new_mt;
+   int width, height, depth;
+
+   intel_miptree_get_dimensions_for_image(rb->TexImage, &width, &height, &depth);
+
+   new_mt = intel_miptree_create(intel, rb->TexImage->TexObject->Target,
+                                 intel_image->base.Base.TexFormat,
+                                 intel_image->base.Base.Level,
+                                 intel_image->base.Base.Level,
+                                 width, height, depth,
+                                 true,
+                                 irb->mt->num_samples,
+                                 INTEL_MIPTREE_TILING_ANY);
+
+   if (intel->vtbl.is_hiz_depth_format(intel, new_mt->format)) {
+      intel_miptree_alloc_hiz(intel, new_mt);
+   }
+
+   intel_miptree_copy_teximage(intel, intel_image, new_mt, invalidate);
+
+   intel_miptree_reference(&irb->mt, intel_image->mt);
+   intel_renderbuffer_set_draw_offset(irb);
+   intel_miptree_release(&new_mt);
+}
+
+/**
+ * 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.NewFramebuffer = intel_new_framebuffer;
+   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;
+}