| /* |
| * 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 Gradient_h |
| #define Gradient_h |
| |
| #include "core/platform/graphics/FloatPoint.h" |
| #include "core/platform/graphics/GraphicsTypes.h" |
| #include "core/platform/graphics/transforms/AffineTransform.h" |
| #include "wtf/PassRefPtr.h" |
| #include "wtf/RefCounted.h" |
| #include "wtf/RefPtr.h" |
| #include "wtf/Vector.h" |
| |
| class SkShader; |
| |
| namespace WebCore { |
| |
| class Color; |
| class FloatRect; |
| class IntSize; |
| |
| class Gradient : public RefCounted<Gradient> { |
| public: |
| static PassRefPtr<Gradient> create(const FloatPoint& p0, const FloatPoint& p1) |
| { |
| return adoptRef(new Gradient(p0, p1)); |
| } |
| static PassRefPtr<Gradient> create(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1, float aspectRatio = 1) |
| { |
| return adoptRef(new Gradient(p0, r0, p1, r1, aspectRatio)); |
| } |
| ~Gradient(); |
| |
| struct ColorStop { |
| float stop; |
| float red; |
| float green; |
| float blue; |
| float alpha; |
| |
| ColorStop() : stop(0), red(0), green(0), blue(0), alpha(0) { } |
| ColorStop(float s, float r, float g, float b, float a) : stop(s), red(r), green(g), blue(b), alpha(a) { } |
| }; |
| void addColorStop(const ColorStop&); |
| void addColorStop(float, const Color&); |
| |
| bool hasAlpha() const; |
| |
| bool isRadial() const { return m_radial; } |
| bool isZeroSize() const { return m_p0.x() == m_p1.x() && m_p0.y() == m_p1.y() && (!m_radial || m_r0 == m_r1); } |
| |
| const FloatPoint& p0() const { return m_p0; } |
| const FloatPoint& p1() const { return m_p1; } |
| |
| void setP0(const FloatPoint& p) |
| { |
| if (m_p0 == p) |
| return; |
| |
| m_p0 = p; |
| invalidateHash(); |
| } |
| |
| void setP1(const FloatPoint& p) |
| { |
| if (m_p1 == p) |
| return; |
| |
| m_p1 = p; |
| invalidateHash(); |
| } |
| |
| float startRadius() const { return m_r0; } |
| float endRadius() const { return m_r1; } |
| |
| void setStartRadius(float r) |
| { |
| if (m_r0 == r) |
| return; |
| |
| m_r0 = r; |
| invalidateHash(); |
| } |
| |
| void setEndRadius(float r) |
| { |
| if (m_r1 == r) |
| return; |
| |
| m_r1 = r; |
| invalidateHash(); |
| } |
| |
| float aspectRatio() const { return m_aspectRatio; } |
| |
| SkShader* shader(); |
| |
| void setStopsSorted(bool s) { m_stopsSorted = s; } |
| |
| void setDrawsInPMColorSpace(bool drawInPMColorSpace); |
| |
| void setSpreadMethod(GradientSpreadMethod); |
| GradientSpreadMethod spreadMethod() { return m_spreadMethod; } |
| void setGradientSpaceTransform(const AffineTransform& gradientSpaceTransformation); |
| AffineTransform gradientSpaceTransform() { return m_gradientSpaceTransformation; } |
| |
| void adjustParametersForTiledDrawing(IntSize&, FloatRect&); |
| |
| unsigned hash() const; |
| void invalidateHash() { m_cachedHash = 0; } |
| |
| private: |
| Gradient(const FloatPoint& p0, const FloatPoint& p1); |
| Gradient(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1, float aspectRatio); |
| |
| void destroyShader(); |
| |
| void sortStopsIfNecessary(); |
| |
| // Keep any parameters relevant to rendering in sync with the structure in Gradient::hash(). |
| bool m_radial; |
| FloatPoint m_p0; |
| FloatPoint m_p1; |
| float m_r0; |
| float m_r1; |
| float m_aspectRatio; // For elliptical gradient, width / height. |
| mutable Vector<ColorStop, 2> m_stops; |
| mutable bool m_stopsSorted; |
| GradientSpreadMethod m_spreadMethod; |
| AffineTransform m_gradientSpaceTransformation; |
| |
| bool m_drawInPMColorSpace; |
| |
| mutable unsigned m_cachedHash; |
| |
| RefPtr<SkShader> m_gradient; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif |