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// Copyright 2014 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 "cc/output/overlay_strategy_underlay.h"
#include "cc/output/overlay_candidate_validator.h"
#include "cc/quads/draw_quad.h"
#include "cc/quads/solid_color_draw_quad.h"
namespace cc {
OverlayStrategyUnderlay::~OverlayStrategyUnderlay() {}
OverlayResult OverlayStrategyUnderlay::TryOverlay(
OverlayCandidateValidator* capability_checker,
RenderPassList* render_passes_in_draw_order,
OverlayCandidateList* candidate_list,
const OverlayCandidate& candidate,
QuadList::Iterator* candidate_iterator,
float device_scale_factor) {
RenderPass* root_render_pass = render_passes_in_draw_order->back();
QuadList& quad_list = root_render_pass->quad_list;
// Add the overlay.
OverlayCandidateList new_candidate_list = *candidate_list;
new_candidate_list.push_back(candidate);
new_candidate_list.back().plane_z_order = -1;
// Check for support.
capability_checker->CheckOverlaySupport(&new_candidate_list);
// If the candidate can be handled by an overlay, create a pass for it. We
// need to switch out the video quad with a black transparent one.
if (new_candidate_list.back().overlay_handled) {
const SharedQuadState* shared_quad_state =
(*candidate_iterator)->shared_quad_state;
gfx::Rect rect = (*candidate_iterator)->visible_rect;
SolidColorDrawQuad* replacement =
quad_list.ReplaceExistingElement<SolidColorDrawQuad>(
*candidate_iterator);
replacement->SetAll(shared_quad_state, rect, rect, rect, false,
SK_ColorTRANSPARENT, true);
candidate_list->swap(new_candidate_list);
return CREATED_OVERLAY_STOP_LOOKING;
}
return DID_NOT_CREATE_OVERLAY;
}
} // namespace cc
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