| /* |
| * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "third_party/blink/renderer/core/svg/svg_path_byte_stream_builder.h" |
| |
| #include "third_party/blink/renderer/core/svg/svg_path_byte_stream.h" |
| #include "third_party/blink/renderer/core/svg/svg_path_data.h" |
| #include "third_party/blink/renderer/platform/geometry/float_point.h" |
| |
| namespace blink { |
| |
| // Helper class that coalesces writes to a SVGPathByteStream to a local buffer. |
| class CoalescingBuffer { |
| public: |
| CoalescingBuffer(SVGPathByteStream& byte_stream) |
| : current_offset_(0), byte_stream_(byte_stream) {} |
| ~CoalescingBuffer() { byte_stream_.Append(bytes_, current_offset_); } |
| |
| template <typename DataType> |
| void WriteType(DataType value) { |
| ByteType<DataType> data; |
| data.value = value; |
| wtf_size_t type_size = sizeof(ByteType<DataType>); |
| DCHECK_LE(current_offset_ + type_size, sizeof(bytes_)); |
| memcpy(bytes_ + current_offset_, data.bytes, type_size); |
| current_offset_ += type_size; |
| } |
| |
| 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(uint16_t value) { WriteType<uint16_t>(value); } |
| |
| private: |
| // Adjust size to fit the largest command (in serialized/byte-stream format). |
| // Currently a cubic segment. |
| wtf_size_t current_offset_; |
| unsigned char bytes_[sizeof(uint16_t) + sizeof(FloatPoint) * 3]; |
| SVGPathByteStream& byte_stream_; |
| }; |
| |
| SVGPathByteStreamBuilder::SVGPathByteStreamBuilder( |
| SVGPathByteStream& byte_stream) |
| : byte_stream_(byte_stream) {} |
| |
| void SVGPathByteStreamBuilder::EmitSegment(const PathSegmentData& segment) { |
| CoalescingBuffer buffer(byte_stream_); |
| buffer.WriteSegmentType(segment.command); |
| |
| switch (segment.command) { |
| case kPathSegMoveToRel: |
| case kPathSegMoveToAbs: |
| case kPathSegLineToRel: |
| case kPathSegLineToAbs: |
| case kPathSegCurveToQuadraticSmoothRel: |
| case kPathSegCurveToQuadraticSmoothAbs: |
| buffer.WriteFloatPoint(segment.target_point); |
| break; |
| case kPathSegLineToHorizontalRel: |
| case kPathSegLineToHorizontalAbs: |
| buffer.WriteFloat(segment.target_point.X()); |
| break; |
| case kPathSegLineToVerticalRel: |
| case kPathSegLineToVerticalAbs: |
| buffer.WriteFloat(segment.target_point.Y()); |
| break; |
| case kPathSegClosePath: |
| break; |
| case kPathSegCurveToCubicRel: |
| case kPathSegCurveToCubicAbs: |
| buffer.WriteFloatPoint(segment.point1); |
| buffer.WriteFloatPoint(segment.point2); |
| buffer.WriteFloatPoint(segment.target_point); |
| break; |
| case kPathSegCurveToCubicSmoothRel: |
| case kPathSegCurveToCubicSmoothAbs: |
| buffer.WriteFloatPoint(segment.point2); |
| buffer.WriteFloatPoint(segment.target_point); |
| break; |
| case kPathSegCurveToQuadraticRel: |
| case kPathSegCurveToQuadraticAbs: |
| buffer.WriteFloatPoint(segment.point1); |
| buffer.WriteFloatPoint(segment.target_point); |
| break; |
| case kPathSegArcRel: |
| case kPathSegArcAbs: |
| buffer.WriteFloatPoint(segment.point1); |
| buffer.WriteFloat(segment.point2.X()); |
| buffer.WriteFlag(segment.arc_large); |
| buffer.WriteFlag(segment.arc_sweep); |
| buffer.WriteFloatPoint(segment.target_point); |
| break; |
| default: |
| NOTREACHED(); |
| } |
| } |
| |
| } // namespace blink |