1 files changed, 83 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/platform/graphics/gpu/graphics_context_3d_utils.cc b/chromium/third_party/blink/renderer/platform/graphics/gpu/graphics_context_3d_utils.cc
new file mode 100644
index 00000000000..0adc80a4a48
--- /dev/null
+++ b/chromium/third_party/blink/renderer/platform/graphics/gpu/graphics_context_3d_utils.cc
@@ -0,0 +1,83 @@
+// Copyright 2017 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 "third_party/blink/renderer/platform/graphics/gpu/graphics_context_3d_utils.h"
+
+#include "gpu/command_buffer/client/gles2_interface.h"
+#include "skia/ext/texture_handle.h"
+#include "third_party/blink/renderer/platform/graphics/web_graphics_context_3d_provider_wrapper.h"
+#include "third_party/skia/include/core/SkImage.h"
+#include "third_party/skia/include/gpu/GrContext.h"
+
+namespace {
+
+struct GrTextureMailboxReleaseProcData {
+  GrTexture* gr_texture_;
+  base::WeakPtr<blink::WebGraphicsContext3DProviderWrapper>
+      context_provider_wrapper_;
+};
+
+void GrTextureMailboxReleaseProc(void* data) {
+  GrTextureMailboxReleaseProcData* release_proc_data =
+      static_cast<GrTextureMailboxReleaseProcData*>(data);
+
+  if (release_proc_data->context_provider_wrapper_) {
+    release_proc_data->context_provider_wrapper_->Utils()->RemoveCachedMailbox(
+        release_proc_data->gr_texture_);
+  }
+
+  delete release_proc_data;
+}
+
+}  // unnamed namespace
+
+namespace blink {
+
+void GraphicsContext3DUtils::GetMailboxForSkImage(gpu::Mailbox& out_mailbox,
+                                                  const sk_sp<SkImage>& image,
+                                                  GLenum filter) {
+  // This object is owned by context_provider_wrapper_, so that weak ref
+  // should never be null.
+  DCHECK(context_provider_wrapper_);
+  DCHECK(image->isTextureBacked());
+  GrContext* gr = context_provider_wrapper_->ContextProvider()->GetGrContext();
+  gpu::gles2::GLES2Interface* gl =
+      context_provider_wrapper_->ContextProvider()->ContextGL();
+
+  DCHECK(gr);
+  DCHECK(gl);
+  GrTexture* gr_texture = image->getTexture();
+  DCHECK(gr == gr_texture->getContext());
+  auto it = cached_mailboxes_.find(gr_texture);
+  if (it != cached_mailboxes_.end()) {
+    out_mailbox = it->value;
+  } else {
+    gl->GenMailboxCHROMIUM(out_mailbox.name);
+
+    GrTextureMailboxReleaseProcData* release_proc_data =
+        new GrTextureMailboxReleaseProcData();
+    release_proc_data->gr_texture_ = gr_texture;
+    release_proc_data->context_provider_wrapper_ = context_provider_wrapper_;
+    gr_texture->setRelease(GrTextureMailboxReleaseProc, release_proc_data);
+    cached_mailboxes_.insert(gr_texture, out_mailbox);
+  }
+
+  GLuint texture_id =
+      skia::GrBackendObjectToGrGLTextureInfo(image->getTextureHandle(true))
+          ->fID;
+  gl->BindTexture(GL_TEXTURE_2D, texture_id);
+  gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
+  gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
+  gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+  gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+  gl->BindTexture(GL_TEXTURE_2D, 0);
+  gl->ProduceTextureDirectCHROMIUM(texture_id, out_mailbox.name);
+  image->getTexture()->textureParamsModified();
+}
+
+void GraphicsContext3DUtils::RemoveCachedMailbox(GrTexture* gr_texture) {
+  cached_mailboxes_.erase(gr_texture);
+}
+
+}  // namespace blink