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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/platform/graphics/crossfade_generated_image.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_canvas.h"
#include "third_party/blink/renderer/platform/graphics/skia/skia_utils.h"
#include "ui/gfx/geometry/rect_f.h"
namespace blink {
CrossfadeGeneratedImage::CrossfadeGeneratedImage(Vector<WeightedImage> images,
const gfx::SizeF& size)
: GeneratedImage(size), images_(std::move(images)) {}
void CrossfadeGeneratedImage::DrawCrossfade(
cc::PaintCanvas* canvas,
const cc::PaintFlags& flags,
const ImageDrawOptions& draw_options) {
gfx::RectF dest_rect(size_);
// TODO(junov): The various effects encoded into paint should probably be
// applied here instead of inside the layer. This probably faulty behavior
// was maintained in order to preserve pre-existing behavior while refactoring
// this code. This should be investigated further. crbug.com/472634
cc::PaintFlags layer_flags;
layer_flags.setBlendMode(flags.getBlendMode());
PaintCanvasAutoRestore ar(canvas, false);
canvas->saveLayer(layer_flags);
cc::PaintFlags image_flags(flags);
for (unsigned image_idx = 0; image_idx < images_.size(); ++image_idx) {
ImageDrawOptions image_draw_options(draw_options);
if (image_idx == 0) {
// TODO(junov): This code should probably be propagating the
// RespectImageOrientationEnum from CrossfadeGeneratedImage::draw(). Code
// was written this way during refactoring to avoid modifying existing
// behavior, but this warrants further investigation. crbug.com/472634
image_draw_options.respect_orientation = kDoNotRespectImageOrientation;
image_flags.setBlendMode(SkBlendMode::kSrcOver);
} else {
image_flags.setBlendMode(SkBlendMode::kPlus);
}
const WeightedImage& image = images_[image_idx];
image_flags.setColor(ScaleAlpha(flags.getColor(), image.weight));
image.image->Draw(canvas, image_flags, dest_rect,
gfx::RectF(gfx::SizeF(image.image->Size())),
image_draw_options);
}
}
void CrossfadeGeneratedImage::Draw(cc::PaintCanvas* canvas,
const cc::PaintFlags& flags,
const gfx::RectF& dst_rect,
const gfx::RectF& src_rect,
const ImageDrawOptions& draw_options) {
// Draw nothing if any of the images have not loaded yet.
for (const WeightedImage& image : images_) {
if (image.image == Image::NullImage()) {
return;
}
}
PaintCanvasAutoRestore ar(canvas, true);
SkRect src_sk_rect = gfx::RectFToSkRect(src_rect);
SkRect dst_sk_rect = gfx::RectFToSkRect(dst_rect);
canvas->clipRect(dst_sk_rect);
canvas->concat(SkM44::RectToRect(src_sk_rect, dst_sk_rect));
DrawCrossfade(canvas, flags, draw_options);
}
void CrossfadeGeneratedImage::DrawTile(cc::PaintCanvas* canvas,
const gfx::RectF& src_rect,
const ImageDrawOptions& options) {
// Draw nothing if either of the images hasn't loaded yet.
for (const WeightedImage& image : images_) {
if (image.image == Image::NullImage()) {
return;
}
}
cc::PaintFlags flags;
flags.setAntiAlias(true);
DrawCrossfade(canvas, flags, options);
}
} // namespace blink
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