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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_UNOWNED_TEXTURE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_UNOWNED_TEXTURE_H_
#include "third_party/blink/renderer/modules/webgl/webgl_texture.h"
namespace blink {
// This class exists to prevent a double-freeing of a texture resource.
// It is also necessary for WebXR's Camera Access feature to be able to
// provide a camera image textures until it's decided how to best expose
// the texture to the WebXR API.
// TODO(https://bugs.chromium.org/p/chromium/issues/detail?id=1104340).
// The texture does not own its texture name - it relies on being notified that
// the texture name has been deleted by whoever owns it.
class WebGLUnownedTexture final : public WebGLTexture {
public:
// The provided GLuint must have been created in the same
// WebGLContextObjectSupport that is provided. Garbage collection of
// this texture will not result in any GL calls being issued.
explicit WebGLUnownedTexture(WebGLContextObjectSupport* ctx,
GLuint texture,
GLenum target);
~WebGLUnownedTexture() override;
// Used to notify the unowned texture that the owner has removed the texture
// name and so that it should not be used anymore.
void OnGLDeleteTextures();
bool IsOpaqueTexture() const override { return true; }
private:
void DeleteObjectImpl(gpu::gles2::GLES2Interface*) override;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_UNOWNED_TEXTURE_H_
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