GL Implementation for GPU Discardable

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index b34e6909a82681ff189bf3e9dd063074748a2a8b..15e5376177728fd2a28759bf2c0923effd2f46c4 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -60,6 +60,7 @@
 #include "gpu/command_buffer/service/query_manager.h"
 #include "gpu/command_buffer/service/renderbuffer_manager.h"
 #include "gpu/command_buffer/service/sampler_manager.h"
+#include "gpu/command_buffer/service/service_discardable_manager.h"
 #include "gpu/command_buffer/service/shader_manager.h"
 #include "gpu/command_buffer/service/shader_translator.h"
 #include "gpu/command_buffer/service/texture_manager.h"
@@ -4211,6 +4212,9 @@ void GLES2DecoderImpl::DeleteTexturesHelper(GLsizei n,
               ->UnbindTexture(GL_FRAMEBUFFER, texture_ref);
         }
       }
+
+      GetContextGroup()->discardable_manager()->OnTextureDeleted(client_id,
+                                                                 group_.get());
       RemoveTexture(client_id);
     }
   }
@@ -19576,6 +19580,43 @@ void GLES2DecoderImpl::RestoreAllExternalTextureBindingsIfNeeded() {
       texture_manager()->GetServiceIdGeneration();
 }
 
+error::Error GLES2DecoderImpl::HandleInitializeDiscardableTextureCHROMIUM(
+    uint32_t immediate_data_size,
+    const volatile void* cmd_data) {
+  const volatile gles2::cmds::InitializeDiscardableTextureCHROMIUM& c =
+      *static_cast<
+          const volatile gles2::cmds::InitializeDiscardableTextureCHROMIUM*>(
+          cmd_data);
+  TextureRef* texture = texture_manager()->GetTexture(c.texture_id);
+  if (!texture) {
+    LOCAL_SET_GL_ERROR(GL_INVALID_VALUE,
+                       "glInitializeDiscardableTextureCHROMIUM",
+                       "Invalid texture ID");
+    return error::kNoError;
+  }
+  size_t size = texture->texture()->estimated_size();
+  ServiceDiscardableHandle handle(GetSharedMemoryBuffer(c.shm_id), c.shm_offset,
+                                  c.shm_id);
+  GetContextGroup()->discardable_manager()->InsertLockedTexture(
+      c.texture_id, size, group_.get(), std::move(handle));
+  return error::kNoError;
+}
+
+error::Error GLES2DecoderImpl::HandleUnlockDiscardableTextureCHROMIUM(
+    uint32_t immediate_data_size,
+    const volatile void* cmd_data) {
+  const volatile gles2::cmds::UnlockDiscardableTextureCHROMIUM& c =
+      *static_cast<
+          const volatile gles2::cmds::UnlockDiscardableTextureCHROMIUM*>(
+          cmd_data);
+  if (!GetContextGroup()->discardable_manager()->UnlockTexture(c.texture_id,
+                                                               group_.get())) {
+    LOCAL_SET_GL_ERROR(GL_INVALID_VALUE, "glUnlockDiscardableTextureCHROMIUM",
+                       "Texture ID not initialized");
+  }
+  return error::kNoError;
+}
+
 // 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.