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92 lines
3.4 KiB
92 lines
3.4 KiB
/* |
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, |
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2020, 2021, 2022, 2023, 2024, 2025, 2026 |
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Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all 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 |
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THE 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 |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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#include "Magnum/ImageView.h" |
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#include "Magnum/GL/Framebuffer.h" |
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#include "Magnum/GL/Texture.h" |
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#include "Magnum/GL/TextureFormat.h" |
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#include "Magnum/Math/Range.h" |
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#include "Magnum/TextureTools/DistanceFieldGL.h" |
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#define DOXYGEN_ELLIPSIS(...) __VA_ARGS__ |
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using namespace Magnum; |
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/* Make sure the name doesn't conflict with any other snippets to avoid linker |
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warnings, unlike with `int main()` there now has to be a declaration to |
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avoid -Wmisssing-prototypes */ |
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void mainTextureToolsGL(); |
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void mainTextureToolsGL() { |
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/* On ES it requires one extra parameter with input image size */ |
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#ifndef MAGNUM_TARGET_GLES |
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{ |
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/* [DistanceFieldGL] */ |
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ImageView2D image = DOXYGEN_ELLIPSIS(ImageView2D{PixelFormat{}, {}, nullptr}); |
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GL::Texture2D input; |
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input |
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.setMinificationFilter(GL::SamplerFilter::Nearest) |
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.setMagnificationFilter(GL::SamplerFilter::Nearest) |
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.setStorage(1, GL::textureFormat(image.format()), image.size()) |
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.setSubImage(0, {}, image); |
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GL::Texture2D output; |
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output.setStorage(1, GL::TextureFormat::R8, image.size()/4); |
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TextureTools::DistanceFieldGL distanceField{12}; |
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distanceField(input, output, {{}, image.size()/4}); |
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/* [DistanceFieldGL] */ |
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} |
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#endif |
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{ |
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ImageView2D image{PixelFormat{}, {}, nullptr}; |
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TextureTools::DistanceFieldGL distanceField{0}; |
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/* [DistanceFieldGL-parameters-rendering] */ |
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Vector2 renderedSize = DOXYGEN_ELLIPSIS({}); |
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Float ratio = renderedSize.x()/(image.size().x()*distanceField.radius()); |
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/* [DistanceFieldGL-parameters-rendering] */ |
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static_cast<void>(ratio); |
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} |
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/* On ES it requires one extra parameter with input image size */ |
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#ifndef MAGNUM_TARGET_GLES |
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{ |
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ImageView2D image{PixelFormat{}, {}, nullptr}; |
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GL::Texture2D input, output; |
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/* [DistanceFieldGL-incremental] */ |
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/* Construct and set up just once */ |
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TextureTools::DistanceFieldGL distanceField{DOXYGEN_ELLIPSIS(0)}; |
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GL::Framebuffer outputFramebuffer{{{}, image.size()/4}}; |
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outputFramebuffer.attachTexture(GL::Framebuffer::ColorAttachment{0}, output, 0); |
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/* Call the distance field processing each time the input texture is updated */ |
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Range2Di updatedRange = DOXYGEN_ELLIPSIS({}); |
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distanceField(input, output, updatedRange); |
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/* [DistanceFieldGL-incremental] */ |
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} |
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#endif |
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}
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