thorvg/examples/CustomTransform.cpp

/*
 * Copyright (c) 2020 - 2024 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 "Common.h"

/************************************************************************/
/* Drawing Commands                                                     */
/************************************************************************/

void tvgUpdateCmds(tvg::Canvas* canvas, float progress)
{
    if (!canvas) return;

    if (canvas->clear() != tvg::Result::Success) return;

    //Shape
    auto shape = tvg::Shape::gen();

    shape->moveTo(0, -114.5);
    shape->lineTo(54, -5.5);
    shape->lineTo(175, 11.5);
    shape->lineTo(88, 95.5);
    shape->lineTo(108, 216.5);
    shape->lineTo(0, 160.5);
    shape->lineTo(-102, 216.5);
    shape->lineTo(-87, 96.5);
    shape->lineTo(-173, 12.5);
    shape->lineTo(-53, -5.5);
    shape->close();
    shape->fill(0, 0, 255);
    shape->stroke(3);
    shape->stroke(255, 255, 255);

    //Transform Matrix
    tvg::Matrix m = {1, 0, 0, 0, 1, 0, 0, 0, 1};

    //scale x
    m.e11 = 1 - (progress * 0.5f);

    //scale y
    m.e22 = 1 + (progress * 2.0f);

    //rotation
    constexpr auto PI = 3.141592f;
    auto degree = 45.0f;
    auto radian = degree / 180.0f * PI;
    auto cosVal = cosf(radian);
    auto sinVal = sinf(radian);

    auto t11 = m.e11 * cosVal + m.e12 * sinVal;
    auto t12 = m.e11 * -sinVal + m.e12 * cosVal;
    auto t21 = m.e21 * cosVal + m.e22 * sinVal;
    auto t22 = m.e21 * -sinVal + m.e22 * cosVal;
    auto t13 = m.e31 * cosVal + m.e32 * sinVal;
    auto t23 = m.e31 * -sinVal + m.e32 * cosVal;

    m.e11 = t11;
    m.e12 = t12;
    m.e21 = t21;
    m.e22 = t22;
    m.e13 = t13;
    m.e23 = t23;

    //translate
    m.e13 = progress * 300.0f + 300.0f;
    m.e23 = progress * -100.0f + 300.0f;

    shape->transform(m);

    canvas->push(std::move(shape));
}


/************************************************************************/
/* Sw Engine Test Code                                                  */
/************************************************************************/

static unique_ptr<tvg::SwCanvas> swCanvas;

void initSwView(uint32_t* buffer)
{
    //Create a Canvas
    swCanvas = tvg::SwCanvas::gen();
    swCanvas->target(buffer, WIDTH, WIDTH, HEIGHT, tvg::SwCanvas::ARGB8888);

    /* Push the shape into the Canvas drawing list
       When this shape is into the canvas list, the shape could update & prepare
       internal data asynchronously for coming rendering.
       Canvas keeps this shape node unless user call canvas->clear() */
    tvgUpdateCmds(swCanvas.get(), 0);
}

void transitSwCb(Elm_Transit_Effect *effect, Elm_Transit* transit, double progress)
{
    tvgUpdateCmds(swCanvas.get(), progress);

    //Update Efl Canvas
    Eo* img = (Eo*) effect;
    evas_object_image_data_update_add(img, 0, 0, WIDTH, HEIGHT);
    evas_object_image_pixels_dirty_set(img, EINA_TRUE);
}

void drawSwView(void* data, Eo* obj)
{
    if (swCanvas->draw() == tvg::Result::Success) {
        swCanvas->sync();
    }
}


/************************************************************************/
/* GL Engine Test Code                                                  */
/************************************************************************/

static unique_ptr<tvg::GlCanvas> glCanvas;

void initGlView(Evas_Object *obj)
{
    //Create a Canvas
    glCanvas = tvg::GlCanvas::gen();

    //Get the drawing target id
    int32_t targetId;
    auto gl = elm_glview_gl_api_get(obj);
    gl->glGetIntegerv(GL_FRAMEBUFFER_BINDING, &targetId);

    glCanvas->target(targetId, WIDTH, HEIGHT);

    /* Push the shape into the Canvas drawing list
       When this shape is into the canvas list, the shape could update & prepare
       internal data asynchronously for coming rendering.
       Canvas keeps this shape node unless user call canvas->clear() */
    tvgUpdateCmds(glCanvas.get(), 0);
}

void drawGlView(Evas_Object *obj)
{
    auto gl = elm_glview_gl_api_get(obj);
    gl->glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    gl->glClear(GL_COLOR_BUFFER_BIT);

    if (glCanvas->draw() == tvg::Result::Success) {
        glCanvas->sync();
    }
}

void transitGlCb(Elm_Transit_Effect *effect, Elm_Transit* transit, double progress)
{
    tvgUpdateCmds(glCanvas.get(), progress);
    elm_glview_changed_set((Evas_Object*)effect);
}


/************************************************************************/
/* Main Code                                                            */
/************************************************************************/

int main(int argc, char **argv)
{
    tvg::CanvasEngine tvgEngine = tvg::CanvasEngine::Sw;

    if (argc > 1) {
        if (!strcmp(argv[1], "gl")) tvgEngine = tvg::CanvasEngine::Gl;
    }

    //Initialize ThorVG Engine
    if (tvgEngine == tvg::CanvasEngine::Sw) {
        cout << "tvg engine: software" << endl;
    } else {
        cout << "tvg engine: opengl" << endl;
    }

    //Threads Count
    auto threads = std::thread::hardware_concurrency();
    if (threads > 0) --threads;    //Allow the designated main thread capacity

    //Initialize ThorVG Engine
    if (tvg::Initializer::init(tvgEngine, threads) == tvg::Result::Success) {

        elm_init(argc, argv);

        Elm_Transit *transit = elm_transit_add();

        if (tvgEngine == tvg::CanvasEngine::Sw) {
            auto view = createSwView();
            elm_transit_effect_add(transit, transitSwCb, view, nullptr);
        } else {
            auto view = createGlView();
            elm_transit_effect_add(transit, transitGlCb, view, nullptr);
        }

        elm_transit_duration_set(transit, 2);
        elm_transit_repeat_times_set(transit, -1);
        elm_transit_auto_reverse_set(transit, EINA_TRUE);
        elm_transit_go(transit);

        elm_run();

        elm_transit_del(transit);

        elm_shutdown();

        //Terminate ThorVG Engine
        tvg::Initializer::term(tvgEngine);

    } else {
        cout << "engine is not supported" << endl;
    }
    return 0;
}