blob: c01cbb49722acd37e339097ad8406105e232fda6 [file] [log] [blame]
// 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 "base/bind.h"
#include "base/callback.h"
#include "base/macros.h"
#include "media/gpu/media_gpu_export.h"
#include "ui/gfx/geometry/rect.h"
namespace media {
// Receive lots of promotion hints, and aggregate them into a single signal. A
// promotion hint is feedback from the compositor about whether a quad could be
// promoted to an overlay, or whether the compositor would refuse to do so.
// For example, the compositor won't promote a quad that's rotated, since an
// overlay can't do that.
class MEDIA_GPU_EXPORT PromotionHintAggregator {
struct Hint {
Hint(const gfx::Rect& _screen_rect, bool _is_promotable)
: screen_rect(_screen_rect), is_promotable(_is_promotable) {}
gfx::Rect screen_rect;
bool is_promotable = false;
bool operator==(const Hint& other) const {
return other.screen_rect == screen_rect &&
other.is_promotable == is_promotable;
// Pass the hint by value to permit thread-hopping callbacks.
using NotifyPromotionHintCB = base::Callback<void(Hint hint)>;
virtual ~PromotionHintAggregator() = default;
// Notify us that an image has / would be drawn with the given hint.
virtual void NotifyPromotionHint(const Hint& hint) = 0;
// Returns true if and only if it's probably okay to promote the video.
virtual bool IsSafeToPromote() = 0;
} // namespace media