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2a4dfcd10e
- use a decoration style for path-modification chaining. - use a reusable buffer for intermediate path generation.
109 lines
No EOL
3.7 KiB
C++
109 lines
No EOL
3.7 KiB
C++
/*
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* Copyright (c) 2024 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_LOTTIE_MODIFIER_H_
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#define _TVG_LOTTIE_MODIFIER_H_
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#include "tvgCommon.h"
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#include "tvgArray.h"
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#include "tvgMath.h"
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#include "tvgRender.h"
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struct LottieModifier
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{
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enum Type : uint8_t {Roundness = 0, Offset};
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LottieModifier* next = nullptr;
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Type type;
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virtual ~LottieModifier() {}
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virtual bool modifyPath(PathCommand* inCmds, uint32_t inCmdsCnt, Point* inPts, uint32_t inPtsCnt, Matrix* transform, RenderPath& out) = 0;
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virtual bool modifyPolystar(RenderPath& in, RenderPath& out, float outerRoundness, bool hasRoundness) = 0;
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LottieModifier* decorate(LottieModifier* next)
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{
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/* TODO: build the decorative chaining here.
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currently we only have roundness and offset. */
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//roundness -> offset
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if (next->type == Roundness) {
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next->next = this;
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return next;
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}
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//just in the order.
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this->next = next;
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return this;
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}
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};
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struct LottieRoundnessModifier : LottieModifier
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{
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static constexpr float ROUNDNESS_EPSILON = 1.0f;
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RenderPath* buffer;
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float r;
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LottieRoundnessModifier(RenderPath* buffer, float r) : buffer(buffer), r(r)
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{
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type = Roundness;
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}
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bool modifyPath(PathCommand* inCmds, uint32_t inCmdsCnt, Point* inPts, uint32_t inPtsCnt, Matrix* transform, RenderPath& out) override;
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bool modifyPolystar(RenderPath& in, RenderPath& out, float outerRoundness, bool hasRoundness) override;
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bool modifyRect(Point& size, float& r);
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};
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struct LottieOffsetModifier : LottieModifier
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{
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float offset;
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float miterLimit;
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StrokeJoin join;
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LottieOffsetModifier(float offset, float miter = 4.0f, StrokeJoin join = StrokeJoin::Round) : offset(offset), miterLimit(miter), join(join)
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{
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type = Offset;
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}
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bool modifyPath(PathCommand* inCmds, uint32_t inCmdsCnt, Point* inPts, uint32_t inPtsCnt, Matrix* transform, RenderPath& out) override;
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bool modifyPolystar(RenderPath& in, RenderPath& out, float outerRoundness, bool hasRoundness) override;
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bool modifyRect(RenderPath& in, RenderPath& out);
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bool modifyEllipse(Point& radius);
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private:
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struct State
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{
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Line line{};
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Line firstLine{};
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bool moveto = false;
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uint32_t movetoOutIndex = 0;
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uint32_t movetoInIndex = 0;
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};
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void line(RenderPath& out, PathCommand* inCmds, uint32_t inCmdsCnt, Point* inPts, uint32_t& curPt, uint32_t curCmd, State& state, float offset, bool degenerated);
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void corner(RenderPath& out, Line& line, Line& nextLine, uint32_t movetoIndex, bool nextClose);
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};
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#endif |