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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/playback/filter_display_item.h"
#include "base/strings/stringprintf.h"
#include "base/trace_event/trace_event_argument.h"
#include "cc/output/render_surface_filters.h"
#include "skia/ext/refptr.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkImageFilter.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/core/SkXfermode.h"
#include "ui/gfx/skia_util.h"
namespace cc {
FilterDisplayItem::FilterDisplayItem() {
}
FilterDisplayItem::~FilterDisplayItem() {
}
void FilterDisplayItem::SetNew(const FilterOperations& filters,
const gfx::RectF& bounds) {
filters_ = filters;
bounds_ = bounds;
// FilterOperations doesn't expose its capacity, but size is probably good
// enough.
size_t external_memory_usage = filters_.size() * sizeof(filters_.at(0));
DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 1 /* op_count */,
external_memory_usage);
}
void FilterDisplayItem::Raster(SkCanvas* canvas,
const gfx::Rect& canvas_target_playback_rect,
SkPicture::AbortCallback* callback) const {
canvas->save();
canvas->translate(bounds_.x(), bounds_.y());
skia::RefPtr<SkImageFilter> image_filter =
RenderSurfaceFilters::BuildImageFilter(
filters_, gfx::SizeF(bounds_.width(), bounds_.height()));
SkRect boundaries;
image_filter->computeFastBounds(
SkRect::MakeWH(bounds_.width(), bounds_.height()), &boundaries);
SkPaint paint;
paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
paint.setImageFilter(image_filter.get());
canvas->saveLayer(&boundaries, &paint);
canvas->translate(-bounds_.x(), -bounds_.y());
}
void FilterDisplayItem::AsValueInto(
base::trace_event::TracedValue* array) const {
array->AppendString(base::StringPrintf("FilterDisplayItem bounds: [%s]",
bounds_.ToString().c_str()));
}
EndFilterDisplayItem::EndFilterDisplayItem() {
DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 0 /* op_count */,
0 /* external_memory_usage */);
}
EndFilterDisplayItem::~EndFilterDisplayItem() {
}
void EndFilterDisplayItem::Raster(SkCanvas* canvas,
const gfx::Rect& canvas_target_playback_rect,
SkPicture::AbortCallback* callback) const {
canvas->restore();
canvas->restore();
}
void EndFilterDisplayItem::AsValueInto(
base::trace_event::TracedValue* array) const {
array->AppendString("EndFilterDisplayItem");
}
} // namespace cc
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