1 /*
2  * Copyright (c) 2024 the ThorVG project. All rights reserved.
3 
4  * Permission is hereby granted, free of charge, to any person obtaining a copy
5  * of this software and associated documentation files (the "Software"), to deal
6  * in the Software without restriction, including without limitation the rights
7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8  * copies of the Software, and to permit persons to whom the Software is
9  * furnished to do so, subject to the following conditions:
10 
11  * The above copyright notice and this permission notice shall be included in all
12  * copies or substantial portions of the Software.
13 
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20  * SOFTWARE.
21  */
22 
23 #include "../../lv_conf_internal.h"
24 #if LV_USE_THORVG_INTERNAL
25 
26 #ifndef _TVG_LOTTIE_MODIFIER_H_
27 #define _TVG_LOTTIE_MODIFIER_H_
28 
29 #include "tvgCommon.h"
30 #include "tvgArray.h"
31 #include "tvgMath.h"
32 
33 
34 struct LottieRoundnessModifier
35 {
36     static constexpr float ROUNDNESS_EPSILON = 1.0f;
37     float r;
38 
LottieRoundnessModifierLottieRoundnessModifier39     LottieRoundnessModifier(float r) : r(r) {};
40 
41     bool modifyPath(const PathCommand* inCmds, uint32_t inCmdsCnt, const Point* inPts, uint32_t inPtsCnt, Array<PathCommand>& outCmds, Array<Point>& outPts, Matrix* transform) const;
42     bool modifyPolystar(const Array<PathCommand>& inCmds, const Array<Point>& inPts, Array<PathCommand>& outCmds, Array<Point>& outPts, float outerRoundness, bool hasRoundness) const;
43     bool modifyRect(const Point& size, float& r) const;
44 };
45 
46 
47 struct LottieOffsetModifier
48 {
49     float offset;
50     float miterLimit;
51     StrokeJoin join;
52 
offsetLottieOffsetModifier53     LottieOffsetModifier(float offset, float miter = 4.0f, StrokeJoin join = StrokeJoin::Round) : offset(offset), miterLimit(miter), join(join) {};
54 
55     bool modifyPath(const PathCommand* inCmds, uint32_t inCmdsCnt, const Point* inPts, uint32_t inPtsCnt, Array<PathCommand>& outCmds, Array<Point>& outPts) const;
56     bool modifyPolystar(const Array<PathCommand>& inCmds, const Array<Point>& inPts, Array<PathCommand>& outCmds, Array<Point>& outPts) const;
57     bool modifyRect(const PathCommand* inCmds, uint32_t inCmdsCnt, const Point* inPts, uint32_t inPtsCnt, Array<PathCommand>& outCmds, Array<Point>& outPts) const;
58     bool modifyEllipse(float& rx, float& ry) const;
59 
60 private:
61     struct State
62     {
63         Line line{};
64         Line firstLine{};
65         bool moveto = false;
66         uint32_t movetoOutIndex = 0;
67         uint32_t movetoInIndex = 0;
68     };
69 
70     void line(const PathCommand* inCmds, uint32_t inCmdsCnt, const Point* inPts, uint32_t& currentPt, uint32_t currentCmd, State& state, bool degenerated, Array<PathCommand>& cmds, Array<Point>& pts, float offset) const;
71     void corner(const Line& line, const Line& nextLine, uint32_t movetoIndex, bool nextClose, Array<PathCommand>& cmds, Array<Point>& pts) const;
72 };
73 
74 #endif
75 
76 #endif /* LV_USE_THORVG_INTERNAL */
77 
78