| // 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 GraphicsContextState_h |
| #define GraphicsContextState_h |
| |
| #include "platform/graphics/Gradient.h" |
| #include "platform/graphics/GraphicsTypes.h" |
| #include "platform/graphics/Path.h" |
| #include "platform/graphics/Pattern.h" |
| #include "platform/graphics/StrokeData.h" |
| #include "third_party/skia/include/core/SkColorFilter.h" |
| #include "third_party/skia/include/core/SkColorPriv.h" |
| #include "third_party/skia/include/core/SkDrawLooper.h" |
| #include "third_party/skia/include/effects/SkDashPathEffect.h" |
| #include "wtf/PassOwnPtr.h" |
| #include "wtf/RefPtr.h" |
| |
| namespace WebCore { |
| |
| // Encapsulates the state information we store for each pushed graphics state. |
| // Only GraphicsContext can use this class. |
| class GraphicsContextState { |
| private: |
| friend class GraphicsContext; |
| |
| GraphicsContextState() |
| : m_fillColor(Color::black) |
| , m_fillRule(RULE_NONZERO) |
| , m_textDrawingMode(TextModeFill) |
| , m_alpha(1) |
| , m_xferMode(0) |
| , m_compositeOperator(CompositeSourceOver) |
| , m_blendMode(blink::WebBlendModeNormal) |
| #if USE(LOW_QUALITY_IMAGE_INTERPOLATION) |
| , m_interpolationQuality(InterpolationLow) |
| #else |
| , m_interpolationQuality(InterpolationHigh) |
| #endif |
| , m_shouldAntialias(true) |
| , m_shouldSmoothFonts(true) |
| , m_shouldClampToSourceRect(true) |
| { |
| } |
| |
| GraphicsContextState(const GraphicsContextState& other) |
| : m_strokeData(other.m_strokeData) |
| , m_fillColor(other.m_fillColor) |
| , m_fillRule(other.m_fillRule) |
| , m_fillGradient(other.m_fillGradient) |
| , m_fillPattern(other.m_fillPattern) |
| , m_looper(other.m_looper) |
| , m_textDrawingMode(other.m_textDrawingMode) |
| , m_alpha(other.m_alpha) |
| , m_xferMode(other.m_xferMode) |
| , m_colorFilter(other.m_colorFilter) |
| , m_compositeOperator(other.m_compositeOperator) |
| , m_blendMode(other.m_blendMode) |
| , m_interpolationQuality(other.m_interpolationQuality) |
| , m_shouldAntialias(other.m_shouldAntialias) |
| , m_shouldSmoothFonts(other.m_shouldSmoothFonts) |
| , m_shouldClampToSourceRect(other.m_shouldClampToSourceRect) |
| { |
| } |
| |
| // Helper function for applying the state's alpha value to the given input |
| // color to produce a new output color. |
| SkColor applyAlpha(SkColor c) const |
| { |
| int s = roundf(m_alpha * 256); |
| if (s >= 256) |
| return c; |
| if (s < 0) |
| return 0; |
| |
| int a = SkAlphaMul(SkColorGetA(c), s); |
| return (c & 0x00FFFFFF) | (a << 24); |
| } |
| |
| // Returns a new State with all of this object's inherited properties copied. |
| PassOwnPtr<GraphicsContextState> clone() { return adoptPtr(new GraphicsContextState(*this)); } |
| |
| // Not supported. No implementations. |
| void operator=(const GraphicsContextState&); |
| |
| // Stroke. |
| StrokeData m_strokeData; |
| |
| // Fill. |
| Color m_fillColor; |
| WindRule m_fillRule; |
| RefPtr<Gradient> m_fillGradient; |
| RefPtr<Pattern> m_fillPattern; |
| |
| // Shadow. (This will need tweaking if we use draw loopers for other things.) |
| RefPtr<SkDrawLooper> m_looper; |
| |
| // Text. (See TextModeFill & friends.) |
| TextDrawingModeFlags m_textDrawingMode; |
| |
| // Common shader state. |
| float m_alpha; |
| RefPtr<SkXfermode> m_xferMode; |
| RefPtr<SkColorFilter> m_colorFilter; |
| |
| // Compositing control, for the CSS and Canvas compositing spec. |
| CompositeOperator m_compositeOperator; |
| blink::WebBlendMode m_blendMode; |
| |
| // Image interpolation control. |
| InterpolationQuality m_interpolationQuality; |
| |
| bool m_shouldAntialias : 1; |
| bool m_shouldSmoothFonts : 1; |
| bool m_shouldClampToSourceRect : 1; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // GraphicsContextState_h |
| |