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// Copyright 2012 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/contents_scaling_layer.h"
#include "ui/gfx/size_conversions.h"
namespace cc {
gfx::Size ContentsScalingLayer::computeContentBoundsForScale(float scaleX, float scaleY) const {
return gfx::ToCeiledSize(gfx::ScaleSize(bounds(), scaleX, scaleY));
}
ContentsScalingLayer::ContentsScalingLayer()
: last_update_contents_scale_x_(0.f)
, last_update_contents_scale_y_(0.f)
{
}
ContentsScalingLayer::~ContentsScalingLayer() {
}
void ContentsScalingLayer::calculateContentsScale(
float ideal_contents_scale,
bool animating_transform_to_screen,
float* contents_scale_x,
float* contents_scale_y,
gfx::Size* content_bounds) {
*contents_scale_x = ideal_contents_scale;
*contents_scale_y = ideal_contents_scale;
*content_bounds = computeContentBoundsForScale(
ideal_contents_scale,
ideal_contents_scale);
}
void ContentsScalingLayer::didUpdateBounds() {
drawProperties().content_bounds = computeContentBoundsForScale(
contentsScaleX(),
contentsScaleY());
}
void ContentsScalingLayer::update(
ResourceUpdateQueue& queue,
const OcclusionTracker* occlusion,
RenderingStats* stats) {
if (drawProperties().contents_scale_x == last_update_contents_scale_x_ &&
drawProperties().contents_scale_y == last_update_contents_scale_y_)
return;
last_update_contents_scale_x_ = drawProperties().contents_scale_x;
last_update_contents_scale_y_ = drawProperties().contents_scale_y;
// Invalidate the whole layer if scale changed.
setNeedsDisplayRect(gfx::Rect(bounds()));
}
} // namespace cc
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