Allow textures to be moved from one GL context group to another.

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 <stdio.h>
 
 #include <algorithm>
 #include <list>
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/atomicops.h"
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_cftyperef.h"
 #endif
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "build/build_config.h"
+#include "crypto/symmetric_key.h"
 #define GLES2_GPU_SERVICE 1
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/common/id_allocator.h"
 #include "gpu/command_buffer/service/buffer_manager.h"
 #include "gpu/command_buffer/service/cmd_buffer_engine.h"
 #include "gpu/command_buffer/service/context_group.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/framebuffer_manager.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h"
 #include "gpu/command_buffer/service/gles2_cmd_validation.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
+#include "gpu/command_buffer/service/mailbox_manager.h"
 #include "gpu/command_buffer/service/program_manager.h"
 #include "gpu/command_buffer/service/query_manager.h"
 #include "gpu/command_buffer/service/renderbuffer_manager.h"
 #include "gpu/command_buffer/service/shader_manager.h"
 #include "gpu/command_buffer/service/shader_translator.h"
 #include "gpu/command_buffer/service/stream_texture.h"
 #include "gpu/command_buffer/service/stream_texture_manager.h"
+#include "gpu/command_buffer/service/texture_definition.h"
 #include "gpu/command_buffer/service/texture_manager.h"
 #include "gpu/command_buffer/service/vertex_attrib_manager.h"
 #include "ui/gfx/gl/gl_context.h"
 #include "ui/gfx/gl/gl_implementation.h"
 #include "ui/gfx/gl/gl_surface.h"
 #if defined(OS_MACOSX)
 #include "ui/gfx/surface/io_surface_support_mac.h"
 #endif
 
 #if !defined(GL_DEPTH24_STENCIL8)
@@ skipping 445 matching lines @@
                                    uint32* service_texture_id);
 
   // Restores the current state to the user's settings.
   void RestoreCurrentFramebufferBindings();
   void RestoreCurrentRenderbufferBindings();
   void RestoreCurrentTexture2DBindings();
 
   // Sets DEPTH_TEST, STENCIL_TEST and color mask for the current framebuffer.
   void ApplyDirtyState();
 
+  // Reapply the texture parameters to the given texture.
+  void BindAndApplyTextureParameters(TextureManager::TextureInfo* info);
+
   // These check the state of the currently bound framebuffer or the
   // backbuffer if no framebuffer is bound.
   bool BoundFramebufferHasColorAttachmentWithAlpha();
   bool BoundFramebufferHasDepthAttachment();
   bool BoundFramebufferHasStencilAttachment();
 
   virtual error::ContextLostReason GetContextLostReason();
 
  private:
   friend class ScopedGLErrorSuppressor;
@@ skipping 213 matching lines @@
     GLint level);
 
   // Wrapper for TexStorage2DEXT.
   void DoTexStorage2DEXT(
     GLenum target,
     GLint levels,
     GLenum internal_format,
     GLsizei width,
     GLsizei height);
 
+  // Wrapper for SwapTexturesCHROMIUM.

[Ken Russell (switch to Gerrit), 2012/04/26 01:10:53]

Wrong comment.

+  void DoProduceTextureCHROMIUM(GLenum target, const char* key);
+
+  // Wrapper for TexKeyCHROMIUM.

[Ken Russell (switch to Gerrit), 2012/04/26 01:10:53]

Wrong comment.

+  void DoConsumeTextureCHROMIUM(GLenum target, const char* key);
+
   // Creates a ProgramInfo for the given program.
   ProgramManager::ProgramInfo* CreateProgramInfo(
       GLuint client_id, GLuint service_id) {
     return program_manager()->CreateProgramInfo(client_id, service_id);
   }
 
   // Gets the program info for the given program. Returns NULL if none exists.
   ProgramManager::ProgramInfo* GetProgramInfo(GLuint client_id) {
     return program_manager()->GetProgramInfo(client_id);
   }
@@ skipping 2502 matching lines @@
     bool have_stencil = BoundFramebufferHasStencilAttachment();
     glStencilMaskSeparate(GL_FRONT, have_stencil ? mask_stencil_front_ : 0);
     glStencilMaskSeparate(GL_BACK, have_stencil ? mask_stencil_back_ : 0);
     EnableDisable(GL_STENCIL_TEST, enable_stencil_test_ && have_stencil);
     EnableDisable(GL_CULL_FACE, enable_cull_face_);
     EnableDisable(GL_SCISSOR_TEST, enable_scissor_test_);
     state_dirty_ = false;
   }
 }
 
+void GLES2DecoderImpl::BindAndApplyTextureParameters(
+    TextureManager::TextureInfo* info) {
+  glBindTexture(info->target(), info->service_id());
+  glTexParameteri(info->target(), GL_TEXTURE_MIN_FILTER, info->min_filter());
+  glTexParameteri(info->target(), GL_TEXTURE_MAG_FILTER, info->mag_filter());
+  glTexParameteri(info->target(), GL_TEXTURE_WRAP_S, info->wrap_s());
+  glTexParameteri(info->target(), GL_TEXTURE_WRAP_T, info->wrap_t());
+}
+
 GLuint GLES2DecoderImpl::GetBackbufferServiceId() {
   return (offscreen_target_frame_buffer_.get()) ?
       offscreen_target_frame_buffer_->id() :
       surface_->GetBackingFrameBufferObject();
 }
 
 void GLES2DecoderImpl::DoBindFramebuffer(GLenum target, GLuint client_id) {
   FramebufferManager::FramebufferInfo* info = NULL;
   GLuint service_id = 0;
   if (client_id != 0) {
@@ skipping 5219 matching lines @@
       texture_manager()->SetLevelInfo(
           info, target, 0, format, level_width, level_height, 1, 0, format,
           type, false);
       level_width = std::max(1, level_width >> 1);
       level_height = std::max(1, level_height >> 1);
     }
     info->SetImmutable(true);
   }
 }
 
+error::Error GLES2DecoderImpl::HandleGenMailboxCHROMIUM(
+    uint32 immediate_data_size, const gles2::GenMailboxCHROMIUM& c) {
+  uint32 bucket_id = static_cast<uint32>(c.bucket_id);
+  Bucket* bucket = CreateBucket(bucket_id);
+  crypto::SymmetricKey* key =
+      crypto::SymmetricKey::GenerateRandomKey(crypto::SymmetricKey::AES,
+                                              kMailboxSize * 8);
+  std::string mailbox;
+  if (!key->GetRawKey(&mailbox)) {
+    SetGLError(GL_OUT_OF_MEMORY,
+               "glHandleGenMailboxCHROMIUM: failed to generate mailbox");
+    return error::kNoError;
+  }
+
+  DCHECK(mailbox.length() == kMailboxSize);
+
+  bucket->SetSize(kMailboxSize);
+  bucket->SetData(&mailbox[0], 0, kMailboxSize);
+
+  return error::kNoError;
+}
+
+void GLES2DecoderImpl::DoProduceTextureCHROMIUM(GLenum target,
+                                                const char* mailbox) {
+  TextureManager::TextureInfo* info = GetTextureInfoForTarget(target);
+  if (!info) {
+    SetGLError(GL_INVALID_OPERATION,
+               "glProduceTextureCHROMIUM: unknown texture for target");
+    return;
+  }
+
+  TextureDefinition* definition = texture_manager()->Save(info);
+  if (!definition) {
+    SetGLError(GL_INVALID_OPERATION,
+               "glProduceTextureCHROMIUM: invalid texture");
+    return;
+  }
+
+  group_->mailbox_manager()->ProduceTexture(

[greggman, 2012/04/26 18:09:18]

I'm a little concerned that GenMailbox is optional. Does it matter?

+      target,
+      *reinterpret_cast<const MailboxName*>(mailbox),
+      definition,
+      texture_manager());
+
+  BindAndApplyTextureParameters(info);
+}
+
+void GLES2DecoderImpl::DoConsumeTextureCHROMIUM(GLenum target,
+                                                const char* mailbox) {
+  TextureManager::TextureInfo* info = GetTextureInfoForTarget(target);
+  if (!info) {
+    SetGLError(GL_INVALID_OPERATION,
+               "glConsumeTextureCHROMIUM: unknown texture for target");
+    return;
+  }
+
+  scoped_ptr<TextureDefinition> definition(
+      group_->mailbox_manager()->ConsumeTexture(
+      target,
+      *reinterpret_cast<const MailboxName*>(mailbox)));
+  if (!definition.get()) {
+    SetGLError(GL_INVALID_OPERATION,
+               "glConsumeTextureCHROMIUM: empty mailbox");
+    return;
+  }
+
+  if (!texture_manager()->Restore(info, definition.release())) {
+    SetGLError(GL_INVALID_OPERATION,
+               "glConsumeTextureCHROMIUM: invalid texture");
+    return;
+  }
+
+  BindAndApplyTextureParameters(info);
+}
+
 // 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 "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu