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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_RESOURCES_UI_RESOURCE_CLIENT_H_
#define CC_RESOURCES_UI_RESOURCE_CLIENT_H_
#include "base/functional/callback.h"
#include "cc/cc_export.h"
namespace cc {
class UIResourceBitmap;
typedef int UIResourceId;
class CC_EXPORT UIResourceClient {
public:
static constexpr UIResourceId kUninitializedUIResourceId = -1;
// GetBitmap() will be called once soon after resource creation and then will
// be called afterwards whenever the GL context is lost, on the same thread
// that LayerTreeHost::CreateUIResource was called on. It is only safe to
// delete a UIResourceClient object after DeleteUIResource has been called for
// all IDs associated with it. A valid bitmap always must be returned but it
// doesn't need to be the same size or format as the original.
// The bitmap's dimensions must *not* exceed the maximum texture size
// supported by the GPU. For resources that are not bigger than the viewport
// this should not be a problem, but for much larger resources, the caller is
// responsible for ensuring this.
virtual UIResourceBitmap GetBitmap(UIResourceId uid,
bool resource_lost) = 0;
virtual ~UIResourceClient() {}
};
} // namespace cc
#endif // CC_RESOURCES_UI_RESOURCE_CLIENT_H_
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