mirror of
https://github.com/thorvg/thorvg.git
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144 lines
4.4 KiB
C
144 lines
4.4 KiB
C
/*
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* Copyright (c) 2020 Samsung Electronics Co., Ltd. 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_SHAPE_PATH_CPP_
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#define _TVG_SHAPE_PATH_CPP_
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#include "tvgCommon.h"
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/************************************************************************/
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/* Internal Class Implementation */
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/************************************************************************/
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struct ShapePath
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{
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PathCommand* cmds = nullptr;
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uint32_t cmdCnt = 0;
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uint32_t reservedCmdCnt = 0;
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Point *pts = nullptr;
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uint32_t ptsCnt = 0;
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uint32_t reservedPtsCnt = 0;
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~ShapePath()
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{
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if (cmds) free(cmds);
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if (pts) free(pts);
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}
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void reserveCmd(uint32_t cmdCnt)
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{
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if (cmdCnt <= reservedCmdCnt) return;
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reservedCmdCnt = cmdCnt;
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cmds = static_cast<PathCommand*>(realloc(cmds, sizeof(PathCommand) * reservedCmdCnt));
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assert(cmds);
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}
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void reservePts(uint32_t ptsCnt)
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{
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if (ptsCnt <= reservedPtsCnt) return;
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reservedPtsCnt = ptsCnt;
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pts = static_cast<Point*>(realloc(pts, sizeof(Point) * reservedPtsCnt));
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assert(pts);
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}
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void grow(uint32_t cmdCnt, uint32_t ptsCnt)
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{
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reserveCmd(this->cmdCnt + cmdCnt);
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reservePts(this->ptsCnt + ptsCnt);
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}
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void reset()
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{
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cmdCnt = 0;
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ptsCnt = 0;
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}
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void append(const PathCommand* cmds, uint32_t cmdCnt, const Point* pts, uint32_t ptsCnt)
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{
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memcpy(this->cmds + this->cmdCnt, cmds, sizeof(PathCommand) * cmdCnt);
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memcpy(this->pts + this->ptsCnt, pts, sizeof(Point) * ptsCnt);
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this->cmdCnt += cmdCnt;
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this->ptsCnt += ptsCnt;
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}
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void moveTo(float x, float y)
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{
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if (cmdCnt + 1 > reservedCmdCnt) reserveCmd((cmdCnt + 1) * 2);
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if (ptsCnt + 2 > reservedPtsCnt) reservePts((ptsCnt + 2) * 2);
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cmds[cmdCnt++] = PathCommand::MoveTo;
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pts[ptsCnt++] = {x, y};
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}
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void lineTo(float x, float y)
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{
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if (cmdCnt + 1 > reservedCmdCnt) reserveCmd((cmdCnt + 1) * 2);
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if (ptsCnt + 2 > reservedPtsCnt) reservePts((ptsCnt + 2) * 2);
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cmds[cmdCnt++] = PathCommand::LineTo;
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pts[ptsCnt++] = {x, y};
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}
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void cubicTo(float cx1, float cy1, float cx2, float cy2, float x, float y)
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{
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if (cmdCnt + 1 > reservedCmdCnt) reserveCmd((cmdCnt + 1) * 2);
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if (ptsCnt + 3 > reservedPtsCnt) reservePts((ptsCnt + 3) * 2);
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cmds[cmdCnt++] = PathCommand::CubicTo;
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pts[ptsCnt++] = {cx1, cy1};
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pts[ptsCnt++] = {cx2, cy2};
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pts[ptsCnt++] = {x, y};
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}
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void close()
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{
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if (cmdCnt > 0 && cmds[cmdCnt - 1] == PathCommand::Close) return;
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if (cmdCnt + 1 > reservedCmdCnt) reserveCmd((cmdCnt + 1) * 2);
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cmds[cmdCnt++] = PathCommand::Close;
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}
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bool bounds(float* x, float* y, float* w, float* h)
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{
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if (ptsCnt == 0) return false;
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Point min = { pts[0].x, pts[0].y };
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Point max = { pts[0].x, pts[0].y };
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for(uint32_t i = 1; i < ptsCnt; ++i) {
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if (pts[i].x < min.x) min.x = pts[i].x;
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if (pts[i].y < min.y) min.y = pts[i].y;
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if (pts[i].x > max.x) max.x = pts[i].x;
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if (pts[i].y > max.y) max.y = pts[i].y;
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}
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if (x) *x = min.x;
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if (y) *y = min.y;
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if (w) *w = max.x - min.x;
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if (h) *h = max.y - min.y;
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return true;
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}
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};
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#endif //_TVG_SHAPE_PATH_CPP_
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