Refactor AcceleratedStaticBitmapImage

third_party/WebKit/Source/platform/graphics/MailboxTextureHolder.cpp

+// Copyright 2016 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 "platform/graphics/MailboxTextureHolder.h"
+
+#include "gpu/command_buffer/client/gles2_interface.h"
+#include "platform/graphics/gpu/SharedGpuContext.h"
+#include "public/platform/Platform.h"
+#include "skia/ext/texture_handle.h"
+#include "third_party/skia/include/gpu/GrContext.h"
+
+namespace blink {
+
+MailboxTextureHolder::MailboxTextureHolder(const gpu::Mailbox& mailbox,
+                                           const gpu::SyncToken& syncToken,
+                                           unsigned textureId,
+                                           gpu::gles2::GLES2Interface* gl,
+                                           IntSize mailboxSize)
+    : m_mailbox(mailbox),
+      m_syncToken(syncToken),
+      m_textureId(textureId),

[Justin Novosad, 2016/10/31 16:38:32]

Rename this to textureIdToDeleteAfterMailboxConsumed, to make it clear what this
is for.

+      m_gl(gl),
+      m_size(mailboxSize) {}
+
+MailboxTextureHolder::MailboxTextureHolder(sk_sp<SkImage> image) {
+  gpu::gles2::GLES2Interface* sharedGL = SharedGpuContext::gl();
+  GrContext* sharedGrContext = SharedGpuContext::gr();
+  if (!sharedGrContext) {
+    // Can happen if the context is lost. The SkImage won't be any good now
+    // anyway.
+    return;
+  }
+  GLuint imageTextureId =
+      skia::GrBackendObjectToGrGLTextureInfo(image->getTextureHandle(true))
+          ->fID;
+  sharedGL->BindTexture(GL_TEXTURE_2D, imageTextureId);
+
+  sharedGL->GenMailboxCHROMIUM(m_mailbox.name);
+  sharedGL->ProduceTextureCHROMIUM(GL_TEXTURE_2D, m_mailbox.name);
+  const GLuint64 fenceSync = sharedGL->InsertFenceSyncCHROMIUM();
+  sharedGL->Flush();
+  sharedGL->GenSyncTokenCHROMIUM(fenceSync, m_syncToken.GetData());
+
+  sharedGL->BindTexture(GL_TEXTURE_2D, 0);
+  // We changed bound textures in this function, so reset the GrContext.
+  sharedGrContext->resetContext(kTextureBinding_GrGLBackendState);
+  m_size = IntSize(image->width(), image->height());
+}
+
+MailboxTextureHolder::~MailboxTextureHolder() {
+  m_gl->WaitSyncTokenCHROMIUM(m_syncToken.GetData());
+  m_gl->DeleteTextures(1, &m_textureId);
+}
+
+WebThread* MailboxTextureHolder::getImageThread() {
+  return Platform::current()->currentThread();
+}
+
+unsigned MailboxTextureHolder::sharedContextId() {
+  return SharedGpuContext::kNoSharedContext;
+}
+
+}  // namespace blink