diff options
Diffstat (limited to 'chromium/third_party/WebKit/Source/core/svg/SVGPathByteStreamBuilder.cpp')
-rw-r--r-- | chromium/third_party/WebKit/Source/core/svg/SVGPathByteStreamBuilder.cpp | 119 |
1 files changed, 81 insertions, 38 deletions
diff --git a/chromium/third_party/WebKit/Source/core/svg/SVGPathByteStreamBuilder.cpp b/chromium/third_party/WebKit/Source/core/svg/SVGPathByteStreamBuilder.cpp index 31e50d06dd7..85a58a220bc 100644 --- a/chromium/third_party/WebKit/Source/core/svg/SVGPathByteStreamBuilder.cpp +++ b/chromium/third_party/WebKit/Source/core/svg/SVGPathByteStreamBuilder.cpp @@ -26,6 +26,49 @@ namespace WebCore { +// Helper class that coalesces writes to a SVGPathByteStream to a local buffer. +class CoalescingBuffer { +public: + CoalescingBuffer(SVGPathByteStream* byteStream) + : m_currentOffset(0) + , m_byteStream(byteStream) + { + ASSERT(byteStream); + } + ~CoalescingBuffer() + { + for (size_t i = 0; i < m_currentOffset; ++i) + m_byteStream->append(m_bytes[i]); + } + + template<typename DataType> + void writeType(DataType value) + { + ByteType<DataType> data; + data.value = value; + size_t typeSize = sizeof(ByteType<DataType>); + ASSERT(m_currentOffset + typeSize <= sizeof(m_bytes)); + memcpy(m_bytes + m_currentOffset, data.bytes, typeSize); + m_currentOffset += typeSize; + } + + void writeFlag(bool value) { writeType<bool>(value); } + void writeFloat(float value) { writeType<float>(value); } + void writeFloatPoint(const FloatPoint& point) + { + writeType<float>(point.x()); + writeType<float>(point.y()); + } + void writeSegmentType(unsigned short value) { writeType<unsigned short>(value); } + +private: + // Adjust size to fit the largest command (in serialized/byte-stream format). + // Currently a cubic segment. + size_t m_currentOffset; + unsigned char m_bytes[sizeof(unsigned short) + sizeof(FloatPoint) * 3]; + SVGPathByteStream* m_byteStream; +}; + SVGPathByteStreamBuilder::SVGPathByteStreamBuilder() : m_byteStream(0) { @@ -33,80 +76,80 @@ SVGPathByteStreamBuilder::SVGPathByteStreamBuilder() void SVGPathByteStreamBuilder::moveTo(const FloatPoint& targetPoint, bool, PathCoordinateMode mode) { - ASSERT(m_byteStream); - writeSegmentType(mode == RelativeCoordinates ? PathSegMoveToRel : PathSegMoveToAbs); - writeFloatPoint(targetPoint); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegMoveToRel : PathSegMoveToAbs); + buffer.writeFloatPoint(targetPoint); } void SVGPathByteStreamBuilder::lineTo(const FloatPoint& targetPoint, PathCoordinateMode mode) { - ASSERT(m_byteStream); - writeSegmentType(mode == RelativeCoordinates ? PathSegLineToRel : PathSegLineToAbs); - writeFloatPoint(targetPoint); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegLineToRel : PathSegLineToAbs); + buffer.writeFloatPoint(targetPoint); } void SVGPathByteStreamBuilder::lineToHorizontal(float x, PathCoordinateMode mode) { - ASSERT(m_byteStream); - writeSegmentType(mode == RelativeCoordinates ? PathSegLineToHorizontalRel : PathSegLineToHorizontalAbs); - writeFloat(x); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegLineToHorizontalRel : PathSegLineToHorizontalAbs); + buffer.writeFloat(x); } void SVGPathByteStreamBuilder::lineToVertical(float y, PathCoordinateMode mode) { - ASSERT(m_byteStream); - writeSegmentType(mode == RelativeCoordinates ? PathSegLineToVerticalRel : PathSegLineToVerticalAbs); - writeFloat(y); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegLineToVerticalRel : PathSegLineToVerticalAbs); + buffer.writeFloat(y); } void SVGPathByteStreamBuilder::curveToCubic(const FloatPoint& point1, const FloatPoint& point2, const FloatPoint& targetPoint, PathCoordinateMode mode) { - ASSERT(m_byteStream); - writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToCubicRel : PathSegCurveToCubicAbs); - writeFloatPoint(point1); - writeFloatPoint(point2); - writeFloatPoint(targetPoint); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToCubicRel : PathSegCurveToCubicAbs); + buffer.writeFloatPoint(point1); + buffer.writeFloatPoint(point2); + buffer.writeFloatPoint(targetPoint); } void SVGPathByteStreamBuilder::curveToCubicSmooth(const FloatPoint& point2, const FloatPoint& targetPoint, PathCoordinateMode mode) { - ASSERT(m_byteStream); - writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToCubicSmoothRel : PathSegCurveToCubicSmoothAbs); - writeFloatPoint(point2); - writeFloatPoint(targetPoint); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToCubicSmoothRel : PathSegCurveToCubicSmoothAbs); + buffer.writeFloatPoint(point2); + buffer.writeFloatPoint(targetPoint); } void SVGPathByteStreamBuilder::curveToQuadratic(const FloatPoint& point1, const FloatPoint& targetPoint, PathCoordinateMode mode) { - ASSERT(m_byteStream); - writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToQuadraticRel : PathSegCurveToQuadraticAbs); - writeFloatPoint(point1); - writeFloatPoint(targetPoint); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToQuadraticRel : PathSegCurveToQuadraticAbs); + buffer.writeFloatPoint(point1); + buffer.writeFloatPoint(targetPoint); } void SVGPathByteStreamBuilder::curveToQuadraticSmooth(const FloatPoint& targetPoint, PathCoordinateMode mode) { - ASSERT(m_byteStream); - writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToQuadraticSmoothRel : PathSegCurveToQuadraticSmoothAbs); - writeFloatPoint(targetPoint); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegCurveToQuadraticSmoothRel : PathSegCurveToQuadraticSmoothAbs); + buffer.writeFloatPoint(targetPoint); } void SVGPathByteStreamBuilder::arcTo(float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag, const FloatPoint& targetPoint, PathCoordinateMode mode) { - ASSERT(m_byteStream); - writeSegmentType(mode == RelativeCoordinates ? PathSegArcRel : PathSegArcAbs); - writeFloat(r1); - writeFloat(r2); - writeFloat(angle); - writeFlag(largeArcFlag); - writeFlag(sweepFlag); - writeFloatPoint(targetPoint); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(mode == RelativeCoordinates ? PathSegArcRel : PathSegArcAbs); + buffer.writeFloat(r1); + buffer.writeFloat(r2); + buffer.writeFloat(angle); + buffer.writeFlag(largeArcFlag); + buffer.writeFlag(sweepFlag); + buffer.writeFloatPoint(targetPoint); } void SVGPathByteStreamBuilder::closePath() { - ASSERT(m_byteStream); - writeSegmentType(PathSegClosePath); + CoalescingBuffer buffer(m_byteStream); + buffer.writeSegmentType(PathSegClosePath); } } // namespace WebCore |