thorvg/examples/Path.cpp

/*
 * Copyright (c) 2020 - 2025 the ThorVG project. All rights reserved.

 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "Example.h"

/************************************************************************/
/* ThorVG Drawing Contents                                              */
/************************************************************************/

struct UserExample : tvgexam::Example
{
    bool content(tvg::Canvas* canvas, uint32_t w, uint32_t h) override
    {
        if (!canvas) return false;

        //Command Calls
        {
            //Star
            auto shape1 = tvg::Shape::gen();

            //Appends Paths
            shape1->moveTo(199, 34);
            shape1->lineTo(253, 143);
            shape1->lineTo(374, 160);
            shape1->lineTo(287, 244);
            shape1->lineTo(307, 365);
            shape1->lineTo(199, 309);
            shape1->lineTo(97, 365);
            shape1->lineTo(112, 245);
            shape1->lineTo(26, 161);
            shape1->lineTo(146, 143);
            shape1->close();
            shape1->fill(0, 0, 255);
            canvas->push(shape1);

            //Circle
            auto shape2 = tvg::Shape::gen();

            auto cx = 550.0f;
            auto cy = 550.0f;
            auto radius = 125.0f;
            auto halfRadius = radius * 0.552284f;

            //Append Paths
            shape2->moveTo(cx, cy - radius);
            shape2->cubicTo(cx + halfRadius, cy - radius, cx + radius, cy - halfRadius, cx + radius, cy);
            shape2->cubicTo(cx + radius, cy + halfRadius, cx + halfRadius, cy + radius, cx, cy+ radius);
            shape2->cubicTo(cx - halfRadius, cy + radius, cx - radius, cy + halfRadius, cx - radius, cy);
            shape2->cubicTo(cx - radius, cy - halfRadius, cx - halfRadius, cy - radius, cx, cy - radius);
            shape2->close();
            shape2->fill(255, 0, 0);
            canvas->push(shape2);
        }

        //Commands Copy
        {
            /* Star */

            //Prepare Path Commands
            tvg::PathCommand cmds[11];
            cmds[0] = tvg::PathCommand::MoveTo;
            cmds[1] = tvg::PathCommand::LineTo;
            cmds[2] = tvg::PathCommand::LineTo;
            cmds[3] = tvg::PathCommand::LineTo;
            cmds[4] = tvg::PathCommand::LineTo;
            cmds[5] = tvg::PathCommand::LineTo;
            cmds[6] = tvg::PathCommand::LineTo;
            cmds[7] = tvg::PathCommand::LineTo;
            cmds[8] = tvg::PathCommand::LineTo;
            cmds[9] = tvg::PathCommand::LineTo;
            cmds[10] = tvg::PathCommand::Close;

            //Prepare Path Points
            tvg::Point pts[10];
            pts[0] = {199, 34};    //MoveTo
            pts[1] = {253, 143};   //LineTo
            pts[2] = {374, 160};   //LineTo
            pts[3] = {287, 244};   //LineTo
            pts[4] = {307, 365};   //LineTo
            pts[5] = {199, 309};   //LineTo
            pts[6] = {97, 365};    //LineTo
            pts[7] = {112, 245};   //LineTo
            pts[8] = {26, 161};    //LineTo
            pts[9] = {146, 143};   //LineTo

            auto shape1 = tvg::Shape::gen();
            shape1->appendPath(cmds, 11, pts, 10);     //copy path data
            shape1->fill(0, 255, 0);
            shape1->translate(400, 0);
            canvas->push(shape1);

            /* Circle */
            auto cx = 550.0f;
            auto cy = 550.0f;
            auto radius = 125.0f;
            auto halfRadius = radius * 0.552284f;

            //Prepare Path Commands
            tvg::PathCommand cmds2[6];
            cmds2[0] = tvg::PathCommand::MoveTo;
            cmds2[1] = tvg::PathCommand::CubicTo;
            cmds2[2] = tvg::PathCommand::CubicTo;
            cmds2[3] = tvg::PathCommand::CubicTo;
            cmds2[4] = tvg::PathCommand::CubicTo;
            cmds2[5] = tvg::PathCommand::Close;

            //Prepare Path Points
            tvg::Point pts2[13];
            pts2[0] = {cx, cy - radius};    //MoveTo
            //CubicTo 1
            pts2[1] = {cx + halfRadius, cy - radius};      //Ctrl1
            pts2[2] = {cx + radius, cy - halfRadius};      //Ctrl2
            pts2[3] = {cx + radius, cy};                   //To
            //CubicTo 2
            pts2[4] = {cx + radius, cy + halfRadius};      //Ctrl1
            pts2[5] = {cx + halfRadius, cy + radius};      //Ctrl2
            pts2[6] = {cx, cy+ radius};                    //To
            //CubicTo 3
            pts2[7] = {cx - halfRadius, cy + radius};      //Ctrl1
            pts2[8] = {cx - radius, cy + halfRadius};      //Ctrl2
            pts2[9] = {cx - radius, cy};                   //To
            //CubicTo 4
            pts2[10] = {cx - radius, cy - halfRadius};     //Ctrl1
            pts2[11] = {cx - halfRadius, cy - radius};     //Ctrl2
            pts2[12] = {cx, cy - radius};                  //To

            auto shape2 = tvg::Shape::gen();
            shape2->appendPath(cmds2, 6, pts2, 13);     //copy path data
            shape2->fill(255, 255, 0);
            shape2->translate(-300, 0);
            canvas->push(shape2);
        }

        return true;
    }
};


/************************************************************************/
/* Entry Point                                                          */
/************************************************************************/

int main(int argc, char **argv)
{
    return tvgexam::main(new UserExample, argc, argv);
}