GL Implementation for GPU Discardable

gpu/command_buffer/client/gles2_implementation.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.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 4608 matching lines @@
 void GLES2Implementation::DeleteTexturesHelper(
     GLsizei n, const GLuint* textures) {
   if (!GetIdHandler(id_namespaces::kTextures)->FreeIds(
       this, n, textures, &GLES2Implementation::DeleteTexturesStub)) {
     SetGLError(
         GL_INVALID_VALUE,
         "glDeleteTextures", "id not created by this context.");
     return;
   }
   for (GLsizei ii = 0; ii < n; ++ii) {
+    share_group_->discardable_manager()->FreeTexture(textures[ii]);
+
     for (GLint tt = 0; tt < capabilities_.max_combined_texture_image_units;
          ++tt) {
       TextureUnit& unit = texture_units_[tt];
       if (textures[ii] == unit.bound_texture_2d) {
         unit.bound_texture_2d = 0;
       }
       if (textures[ii] == unit.bound_texture_cube_map) {
         unit.bound_texture_cube_map = 0;
       }
       if (textures[ii] == unit.bound_texture_external_oes) {
@@ skipping 2398 matching lines @@
     unsigned char* addr = static_cast<unsigned char*>(buffer.address());
     memcpy(addr, coeffs, coeffs_size);
 
     helper_->ProgramPathFragmentInputGenCHROMIUM(program, location, gen_mode,
                                                  components, buffer.shm_id(),
                                                  buffer.offset());
   }
   CheckGLError();
 }
 
+void GLES2Implementation::InitializeDiscardableTextureCHROMIUM(
+    GLuint texture_id) {
+  ClientDiscardableManager* manager = share_group()->discardable_manager();
+  if (manager->TextureIsValid(texture_id)) {
+    SetGLError(GL_INVALID_VALUE, "glInitializeDiscardableTextureCHROMIUM",
+               "Texture ID already initialized");
+    return;
+  }
+  ClientDiscardableHandle handle =
+      manager->InitializeTexture(helper_->command_buffer(), texture_id);
+  helper_->InitializeDiscardableTextureCHROMIUM(texture_id, handle.shm_id(),
+                                                handle.byte_offset());
+}
+
+void GLES2Implementation::UnlockDiscardableTextureCHROMIUM(GLuint texture_id) {
+  ClientDiscardableManager* manager = share_group()->discardable_manager();
+  if (!manager->TextureIsValid(texture_id)) {
+    SetGLError(GL_INVALID_VALUE, "glUnlockDiscardableTextureCHROMIUM",
+               "Texture ID not initialized");
+    return;
+  }
+  helper_->UnlockDiscardableTextureCHROMIUM(texture_id);
+}
+
+bool GLES2Implementation::LockDiscardableTextureCHROMIUM(GLuint texture_id) {
+  ClientDiscardableManager* manager = share_group()->discardable_manager();
+  if (!manager->TextureIsValid(texture_id)) {
+    SetGLError(GL_INVALID_VALUE, "glLockDiscardableTextureCHROMIUM",
+               "Texture ID not initialized");
+    return false;
+  }
+  if (!manager->LockTexture(texture_id)) {
+    // Failure to lock means that this texture has been deleted on the service
+    // side. Delete it here as well.
+    DeleteTexturesHelper(1, &texture_id);
+    return false;
+  }
+  return true;
+}
+
 void GLES2Implementation::UpdateCachedExtensionsIfNeeded() {
   if (cached_extension_string_) {
     return;
   }
   GetStringHelper(GL_EXTENSIONS);
 }
 
 void GLES2Implementation::InvalidateCachedExtensions() {
   cached_extension_string_ = nullptr;
   cached_extensions_.clear();
@@ skipping 15 matching lines @@
   CheckGLError();
 }
 
 // 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/client/gles2_implementation_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu