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// Copyright (C) 2013 Google 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:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "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 THE COPYRIGHT
// OWNER 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GRAPHICS_CONTEXT_STATE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GRAPHICS_CONTEXT_STATE_H_
#include <memory>
#include "base/memory/ptr_util.h"
#include "third_party/blink/renderer/platform/graphics/draw_looper_builder.h"
#include "third_party/blink/renderer/platform/graphics/graphics_types.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_flags.h"
#include "third_party/blink/renderer/platform/graphics/stroke_data.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/skia/include/core/SkColorFilter.h"
#include "third_party/skia/include/core/SkRefCnt.h"
namespace blink {
// Encapsulates the state information we store for each pushed graphics state.
// Only GraphicsContext can use this class.
class PLATFORM_EXPORT GraphicsContextState final {
USING_FAST_MALLOC(GraphicsContextState);
public:
static std::unique_ptr<GraphicsContextState> Create() {
return base::WrapUnique(new GraphicsContextState());
}
static std::unique_ptr<GraphicsContextState> CreateAndCopy(
const GraphicsContextState& other) {
return base::WrapUnique(new GraphicsContextState(other));
}
void Copy(const GraphicsContextState&);
// PaintFlags objects that reflect the current state. If the length of the
// path to be stroked is known, pass it in for correct dash or dot placement.
const PaintFlags& StrokeFlags(const int stroked_path_length = 0,
const int dash_thickness = 0) const;
const PaintFlags& FillFlags() const { return fill_flags_; }
uint16_t SaveCount() const { return save_count_; }
void IncrementSaveCount() { ++save_count_; }
void DecrementSaveCount() { --save_count_; }
// Stroke data
Color StrokeColor() const { return stroke_flags_.getColor(); }
void SetStrokeColor(const Color&);
const StrokeData& GetStrokeData() const { return stroke_data_; }
void SetStrokeStyle(StrokeStyle);
void SetStrokeThickness(float);
void SetLineCap(LineCap);
void SetLineJoin(LineJoin);
void SetMiterLimit(float);
void SetLineDash(const DashArray&, float);
// Fill data
Color FillColor() const { return fill_flags_.getColor(); }
void SetFillColor(const Color&);
// Shadow. (This will need tweaking if we use draw loopers for other things.)
SkDrawLooper* DrawLooper() const {
DCHECK_EQ(fill_flags_.getLooper(), stroke_flags_.getLooper());
return fill_flags_.getLooper().get();
}
void SetDrawLooper(sk_sp<SkDrawLooper>);
// Text. (See TextModeFill & friends.)
TextDrawingModeFlags TextDrawingMode() const { return text_drawing_mode_; }
void SetTextDrawingMode(TextDrawingModeFlags mode) {
text_drawing_mode_ = mode;
}
SkColorFilter* GetColorFilter() const {
DCHECK_EQ(fill_flags_.getColorFilter(), stroke_flags_.getColorFilter());
return fill_flags_.getColorFilter().get();
}
void SetColorFilter(sk_sp<SkColorFilter>);
// Image interpolation control.
InterpolationQuality GetInterpolationQuality() const {
return interpolation_quality_;
}
void SetInterpolationQuality(InterpolationQuality);
bool ShouldAntialias() const { return should_antialias_; }
void SetShouldAntialias(bool);
private:
GraphicsContextState();
explicit GraphicsContextState(const GraphicsContextState&);
GraphicsContextState& operator=(const GraphicsContextState&) = delete;
// This is mutable to enable dash path effect updates when the paint is
// fetched for use.
mutable PaintFlags stroke_flags_;
PaintFlags fill_flags_;
StrokeData stroke_data_;
TextDrawingModeFlags text_drawing_mode_;
InterpolationQuality interpolation_quality_;
uint16_t save_count_;
bool should_antialias_ : 1;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GRAPHICS_CONTEXT_STATE_H_
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