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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/check_op.h"
#include "base/memory/ptr_util.h"
#include "cc/paint/draw_looper.h"
#include "cc/paint/paint_flags.h"
#include "third_party/blink/renderer/platform/graphics/color.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context_types.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/skia/include/core/SkRefCnt.h"
namespace blink {
class StrokeData;
// 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> CreateAndCopy(
const GraphicsContextState& other) {
return base::WrapUnique(new GraphicsContextState(other));
}
GraphicsContextState();
void Copy(const GraphicsContextState&);
// cc::PaintFlags objects that reflect the current state.
const cc::PaintFlags& StrokeFlags() const { return stroke_flags_; }
const cc::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 {
// This conversion from SkColor4f to Color will lose information about the
// original Color.
return Color::FromSkColor4f(stroke_flags_.getColor4f());
}
void SetStrokeColor(const Color&);
float GetStrokeThickness() const { return stroke_flags_.getStrokeWidth(); }
void SetStrokeThickness(float);
void SetStroke(const StrokeData& stroke_data);
// Fill data
Color FillColor() const {
// This conversion from SkColor4f to Color will lose information about the
// original Color.
return Color::FromSkColor4f(fill_flags_.getColor4f());
}
void SetFillColor(const Color&);
void SetTextPaintOrder(TextPaintOrder order) { text_paint_order_ = order; }
TextPaintOrder GetTextPaintOrder() const { return text_paint_order_; }
// Shadow. (This will need tweaking if we use draw loopers for other things.)
cc::DrawLooper* DrawLooper() const {
DCHECK_EQ(fill_flags_.getLooper(), stroke_flags_.getLooper());
return fill_flags_.getLooper().get();
}
void SetDrawLooper(sk_sp<cc::DrawLooper>);
// Text. (See TextModeFill & friends.)
TextDrawingModeFlags TextDrawingMode() const { return text_drawing_mode_; }
void SetTextDrawingMode(TextDrawingModeFlags mode) {
text_drawing_mode_ = mode;
}
// Image interpolation control.
InterpolationQuality GetInterpolationQuality() const {
return interpolation_quality_;
}
void SetInterpolationQuality(InterpolationQuality);
DynamicRangeLimit GetDynamicRangeLimit() const {
return dynamic_range_limit_;
}
void SetDynamicRangeLimit(DynamicRangeLimit limit);
bool ShouldAntialias() const { return should_antialias_; }
void SetShouldAntialias(bool);
private:
explicit GraphicsContextState(const GraphicsContextState&);
GraphicsContextState& operator=(const GraphicsContextState&) = delete;
cc::PaintFlags stroke_flags_;
cc::PaintFlags fill_flags_;
TextPaintOrder text_paint_order_ = kFillStroke;
TextDrawingModeFlags text_drawing_mode_ = kTextModeFill;
InterpolationQuality interpolation_quality_ =
GetDefaultInterpolationQuality();
DynamicRangeLimit dynamic_range_limit_{
cc::PaintFlags::DynamicRangeLimit::kHigh};
uint16_t save_count_ = 0;
bool should_antialias_ : 1 = true;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GRAPHICS_CONTEXT_STATE_H_
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