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c26b4edd4e
1. new tesseletor and stroker are used: less vertexes generated In general, the previous implementation was based on the path-outline-mesh approach. It has now been changed to a path-mesh approach, so we skip the path-outline transformation. For shape fills, a BW-tesselator now used, and all submeshes (moveTo) are stored in a single buffer. For strokes, all intermediate operations such as trimming and dash use path-path logic instead of outline-outline logic. In addition, the new stroker generates fewer polygons for joints, especially for Rounds 2. render all sub-shapes by single draw call https://github.com/thorvg/thorvg/issues/3557 https://github.com/thorvg/thorvg/issues/3288 https://github.com/thorvg/thorvg/issues/3273
92 lines
No EOL
3 KiB
C++
92 lines
No EOL
3 KiB
C++
/*
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* Copyright (c) 2025 the ThorVG project. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _TVG_WG_TESSELLATOR_H_
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#define _TVG_WG_TESSELLATOR_H_
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#include "tvgRender.h"
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#include "tvgWgGeometry.h"
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#define MIN_WG_STROKE_WIDTH 1.0f
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class WgStroker
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{
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struct State
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{
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Point firstPt;
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Point firstPtDir;
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Point prevPt;
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Point prevPtDir;
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};
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public:
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WgStroker(WgMeshData* buffer, const Matrix& matrix);
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void stroke(const RenderShape *rshape);
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RenderRegion bounds() const;
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BBox getBBox() const;
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private:
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void doStroke(const RenderPath& path);
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float strokeRadius() const
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{
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return mStrokeWidth * 0.5f;
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}
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void strokeCap();
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void strokeLineTo(const Point& curr);
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void strokeCubicTo(const Point& cnt1, const Point& cnt2, const Point& end);
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void strokeClose();
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void strokeJoin(const Point& dir);
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void strokeRound(const Point& prev, const Point& curr, const Point& center);
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void strokeMiter(const Point& prev, const Point& curr, const Point& center);
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void strokeBevel(const Point& prev, const Point& curr, const Point& center);
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void strokeSquare(const Point& p, const Point& outDir);
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void strokeSquarePoint(const Point& p);
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void strokeRound(const Point& p, const Point& outDir);
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void strokeRoundPoint(const Point& p);
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WgMeshData* mBuffer;
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Matrix mMatrix;
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float mStrokeWidth = MIN_WG_STROKE_WIDTH;
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float mMiterLimit = 4.f;
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StrokeCap mStrokeCap = StrokeCap::Square;
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StrokeJoin mStrokeJoin = StrokeJoin::Bevel;
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State mStrokeState = {};
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Point mLeftTop = {0.0f, 0.0f};
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Point mRightBottom = {0.0f, 0.0f};
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};
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class WgBWTessellator
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{
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public:
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WgBWTessellator(WgMeshData* buffer);
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void tessellate(const RenderPath& path, const Matrix& matrix);
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RenderRegion bounds() const;
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BBox getBBox() const;
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private:
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uint32_t pushVertex(float x, float y);
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void pushTriangle(uint32_t a, uint32_t b, uint32_t c);
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WgMeshData* mBuffer;
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BBox bbox = {};
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};
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#endif /* _TVG_WG_TESSELLATOR_H_ */ |