| /* |
| * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved. |
| * Copyright (C) 2007 Alp Toker <alp@atoker.com> |
| * Copyright (C) 2008 Torch Mobile, Inc. |
| * 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: |
| * 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. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GRADIENT_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GRADIENT_H_ |
| |
| #include "base/macros.h" |
| #include "base/memory/scoped_refptr.h" |
| #include "third_party/blink/renderer/platform/graphics/color.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/paint/paint_shader.h" |
| #include "third_party/blink/renderer/platform/platform_export.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/ref_counted.h" |
| #include "third_party/blink/renderer/platform/wtf/vector.h" |
| #include "third_party/skia/include/core/SkRefCnt.h" |
| |
| class SkMatrix; |
| |
| namespace blink { |
| |
| class FloatPoint; |
| |
| class PLATFORM_EXPORT Gradient : public RefCounted<Gradient> { |
| USING_FAST_MALLOC(Gradient); |
| |
| public: |
| enum class Type { kLinear, kRadial, kConic }; |
| |
| enum class ColorInterpolation { |
| kPremultiplied, |
| kUnpremultiplied, |
| }; |
| |
| enum class DegenerateHandling { |
| kAllow, |
| kDisallow, |
| }; |
| |
| static scoped_refptr<Gradient> CreateLinear( |
| const FloatPoint& p0, |
| const FloatPoint& p1, |
| GradientSpreadMethod = kSpreadMethodPad, |
| ColorInterpolation = ColorInterpolation::kUnpremultiplied, |
| DegenerateHandling = DegenerateHandling::kAllow); |
| |
| static scoped_refptr<Gradient> CreateRadial( |
| const FloatPoint& p0, |
| float r0, |
| const FloatPoint& p1, |
| float r1, |
| float aspect_ratio = 1, |
| GradientSpreadMethod = kSpreadMethodPad, |
| ColorInterpolation = ColorInterpolation::kUnpremultiplied, |
| DegenerateHandling = DegenerateHandling::kAllow); |
| |
| static scoped_refptr<Gradient> CreateConic( |
| const FloatPoint& position, |
| float rotation, |
| float start_angle, |
| float end_angle, |
| GradientSpreadMethod = kSpreadMethodPad, |
| ColorInterpolation = ColorInterpolation::kUnpremultiplied, |
| DegenerateHandling = DegenerateHandling::kAllow); |
| |
| virtual ~Gradient(); |
| |
| Type GetType() const { return type_; } |
| |
| struct ColorStop { |
| DISALLOW_NEW(); |
| double stop; |
| Color color; |
| |
| ColorStop(double s, const Color& c) : stop(s), color(c) {} |
| }; |
| void AddColorStop(const ColorStop&); |
| void AddColorStop(double value, const Color& color) { |
| AddColorStop(ColorStop(value, color)); |
| } |
| void AddColorStops(const Vector<Gradient::ColorStop>&); |
| |
| void ApplyToFlags(PaintFlags&, const SkMatrix& local_matrix); |
| |
| protected: |
| Gradient(Type, GradientSpreadMethod, ColorInterpolation, DegenerateHandling); |
| |
| using ColorBuffer = Vector<SkColor, 8>; |
| using OffsetBuffer = Vector<SkScalar, 8>; |
| virtual sk_sp<PaintShader> CreateShader(const ColorBuffer&, |
| const OffsetBuffer&, |
| SkTileMode, |
| uint32_t flags, |
| const SkMatrix&, |
| SkColor) const = 0; |
| |
| DegenerateHandling GetDegenerateHandling() const { |
| return degenerate_handling_; |
| } |
| |
| private: |
| sk_sp<PaintShader> CreateShaderInternal(const SkMatrix& local_matrix); |
| |
| sk_sp<SkColorFilter> color_filter_; |
| |
| void SortStopsIfNecessary(); |
| void FillSkiaStops(ColorBuffer&, OffsetBuffer&) const; |
| |
| const Type type_; |
| const GradientSpreadMethod spread_method_; |
| const ColorInterpolation color_interpolation_; |
| const DegenerateHandling degenerate_handling_; |
| |
| Vector<ColorStop, 2> stops_; |
| bool stops_sorted_; |
| |
| mutable sk_sp<PaintShader> cached_shader_; |
| |
| DISALLOW_COPY_AND_ASSIGN(Gradient); |
| }; |
| |
| } // namespace blink |
| |
| #endif |