This source file includes following definitions.
- ComputeContentBoundsForScale
- last_update_contents_scale_y_
- CalculateContentsScale
- Update
#include "cc/layers/contents_scaling_layer.h"
#include "ui/gfx/size_conversions.h"
namespace cc {
gfx::Size ContentsScalingLayer::ComputeContentBoundsForScale(
float scale_x,
float scale_y) const {
return gfx::ToCeiledSize(gfx::ScaleSize(bounds(), scale_x, scale_y));
}
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,
float device_scale_factor,
float page_scale_factor,
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);
}
bool ContentsScalingLayer::Update(ResourceUpdateQueue* queue,
const OcclusionTracker<Layer>* occlusion) {
bool updated = Layer::Update(queue, occlusion);
if (draw_properties().contents_scale_x == last_update_contents_scale_x_ &&
draw_properties().contents_scale_y == last_update_contents_scale_y_)
return updated;
last_update_contents_scale_x_ = draw_properties().contents_scale_x;
last_update_contents_scale_y_ = draw_properties().contents_scale_y;
SetNeedsDisplayRect(gfx::Rect(paint_properties().bounds));
return updated;
}
}