diff --git a/examples/ImageRotation.cpp b/examples/ImageRotation.cpp new file mode 100644 index 00000000..b3063b1f --- /dev/null +++ b/examples/ImageRotation.cpp @@ -0,0 +1,99 @@ +/* + * Copyright (c) 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 +#include "Example.h" + +/************************************************************************/ +/* ThorVG Drawing Contents */ +/************************************************************************/ + +struct UserExample : tvgexam::Example +{ + tvg::Picture* pPicture = nullptr; + + float deg2rad(float degree) + { + return degree * (M_PI / 180.0f); + } + + bool content(tvg::Canvas* canvas, uint32_t w, uint32_t h) override + { + if (!canvas) return false; + + auto picture = tvg::Picture::gen(); + pPicture = picture.get(); + + if (!tvgexam::verify(picture->load(EXAMPLE_DIR"/image/scaledown.jpg"))) return false; + + canvas->push(std::move(picture)); + + return true; + } + + bool update(tvg::Canvas* canvas, uint32_t elapsed) override + { + if (!canvas) return false; + + canvas->clear(false); + + tvg::Matrix m = {1.0f, 0.0f, 0.0f, 0.0f, 0.1f, 0.0f, 0.0f, 0.0f, 1.0f}; + + //center pivoting + m.e13 += 400; + m.e23 += 400; + + //rotation + auto degree = tvgexam::progress(elapsed, 4.0f) * 360.0f; + auto radian = deg2rad(degree); + m.e11 = cosf(radian); + m.e12 = -sinf(radian); + m.e21 = sinf(radian); + m.e22 = cosf(radian); + + //scaling + m.e11 *= 0.75f; + m.e21 *= 0.75f; + m.e22 *= 0.75f; + m.e12 *= 0.75f; + + //center pivoting + m.e13 += (-400 * m.e11 + -400 * m.e12); + m.e23 += (-400 * m.e21 + -400 * m.e22); + + pPicture->transform(m); + + canvas->update(); + + return true; + } +}; + + +/************************************************************************/ +/* Entry Point */ +/************************************************************************/ + +int main(int argc, char **argv) +{ + return tvgexam::main(new UserExample, argc, argv); +} \ No newline at end of file diff --git a/examples/meson.build b/examples/meson.build index 2d1da477..aeb8ff64 100644 --- a/examples/meson.build +++ b/examples/meson.build @@ -33,6 +33,7 @@ source_file = [ 'GradientMasking.cpp', 'GradientStroke.cpp', 'GradientTransform.cpp', + 'ImageRotation.cpp', 'ImageScaleDown.cpp', 'ImageScaleUp.cpp', 'Interaction.cpp',