gpu: Implement GL_INTEL_framebuffer_CMAA via shaders in the GPU Service

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 21 matching lines @@
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "gpu/command_buffer/service/buffer_manager.h"
 #include "gpu/command_buffer/service/context_group.h"
 #include "gpu/command_buffer/service/context_state.h"
 #include "gpu/command_buffer/service/error_state.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/framebuffer_manager.h"
 #include "gpu/command_buffer/service/gl_stream_texture_image.h"
 #include "gpu/command_buffer/service/gl_utils.h"
+#include "gpu/command_buffer/service/gles2_cmd_apply_framebuffer_attachment_cmaa_intel.h"
 #include "gpu/command_buffer/service/gles2_cmd_clear_framebuffer.h"
 #include "gpu/command_buffer/service/gles2_cmd_copy_tex_image.h"
 #include "gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_passthrough.h"
 #include "gpu/command_buffer/service/gles2_cmd_validation.h"
 #include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/command_buffer/service/gpu_state_tracer.h"
 #include "gpu/command_buffer/service/gpu_tracer.h"
 #include "gpu/command_buffer/service/image_manager.h"
 #include "gpu/command_buffer/service/logger.h"
@@ skipping 2100 matching lines @@
   bool shader_texture_lod_explicitly_enabled_;
 
   bool compile_shader_always_succeeds_;
 
   // An optional behaviour to lose the context and group when OOM.
   bool lose_context_when_out_of_memory_;
 
   // Log extra info.
   bool service_logging_;
 
+  std::unique_ptr<ApplyFramebufferAttachmentCMAAINTELResourceManager>
+      apply_framebuffer_attachment_cmaa_intel_;
   std::unique_ptr<CopyTexImageResourceManager> copy_tex_image_blit_;
   std::unique_ptr<CopyTextureCHROMIUMResourceManager> copy_texture_CHROMIUM_;
   std::unique_ptr<ClearFramebufferResourceManager> clear_framebuffer_blit_;
 
   // Cached values of the currently assigned viewport dimensions.
   GLsizei viewport_max_width_;
   GLsizei viewport_max_height_;
 
   // Command buffer stats.
   base::TimeDelta total_processing_commands_time_;
@@ skipping 2102 matching lines @@
 
   if (offscreen_saved_color_texture_info_.get()) {
     DCHECK(offscreen_saved_color_texture_);
     DCHECK_EQ(offscreen_saved_color_texture_info_->service_id(),
               offscreen_saved_color_texture_->id());
     offscreen_saved_color_texture_->Invalidate();
     offscreen_saved_color_texture_info_ = NULL;
   }
   ReleaseAllBackTextures();
   if (have_context) {
+    if (apply_framebuffer_attachment_cmaa_intel_.get()) {
+      apply_framebuffer_attachment_cmaa_intel_->Destroy();
+      apply_framebuffer_attachment_cmaa_intel_.reset();
+    }
+
     if (copy_tex_image_blit_.get()) {
       copy_tex_image_blit_->Destroy();
       copy_tex_image_blit_.reset();
     }
 
     if (copy_texture_CHROMIUM_.get()) {
       copy_texture_CHROMIUM_->Destroy();
       copy_texture_CHROMIUM_.reset();
     }
 
@@ skipping 56 matching lines @@
       offscreen_resolved_color_texture_->Invalidate();
   }
 
   // Current program must be cleared after calling ProgramManager::UnuseProgram.
   // Otherwise, we can leak objects. http://crbug.com/258772.
   // state_.current_program must be reset before group_ is reset because
   // the later deletes the ProgramManager object that referred by
   // state_.current_program object.
   state_.current_program = NULL;
 
+  apply_framebuffer_attachment_cmaa_intel_.reset();
   copy_tex_image_blit_.reset();
   copy_texture_CHROMIUM_.reset();
   clear_framebuffer_blit_.reset();
 
   if (query_manager_.get()) {
     query_manager_->Destroy(have_context);
     query_manager_.reset();
   }
 
   if (vertex_array_manager_ .get()) {
@@ skipping 10917 matching lines @@
     return;
   }
 
   texture_ref = texture_manager()->Consume(client_id, texture);
 }
 
 void GLES2DecoderImpl::DoApplyScreenSpaceAntialiasingCHROMIUM() {
   // Apply CMAA(Conservative Morphological Anti-Aliasing) algorithm to the
   // color attachments of currently bound draw framebuffer.
   // Reference GL_INTEL_framebuffer_CMAA for details.
-  glApplyFramebufferAttachmentCMAAINTEL();
+  // Use platform version if available.
+  if (!feature_info_->feature_flags()
+           .use_chromium_screen_space_antialiasing_via_shaders) {
+    glApplyFramebufferAttachmentCMAAINTEL();
+  } else {
+    // Defer initializing the CopyTextureCHROMIUMResourceManager until it is
+    // needed because it takes ??s of milliseconds to initialize.
+    if (!apply_framebuffer_attachment_cmaa_intel_.get()) {
+      LOCAL_COPY_REAL_GL_ERRORS_TO_WRAPPER(
+          "glApplyFramebufferAttachmentCMAAINTEL");
+      apply_framebuffer_attachment_cmaa_intel_.reset(
+          new ApplyFramebufferAttachmentCMAAINTELResourceManager());
+      apply_framebuffer_attachment_cmaa_intel_->Initialize(this);
+      RestoreCurrentFramebufferBindings();
+      if (LOCAL_PEEK_GL_ERROR("glApplyFramebufferAttachmentCMAAINTEL") !=
+          GL_NO_ERROR)
+        return;
+    }
+    apply_framebuffer_attachment_cmaa_intel_
+        ->ApplyFramebufferAttachmentCMAAINTEL(
+            this, GetFramebufferInfoForTarget(GL_DRAW_FRAMEBUFFER));
+  }
 }
 
 void GLES2DecoderImpl::DoInsertEventMarkerEXT(
     GLsizei length, const GLchar* marker) {
   if (!marker) {
     marker = "";
   }
   debug_marker_manager_.SetMarker(
       length ? std::string(marker, length) : std::string(marker));
 }
@@ skipping 1665 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu