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185 lines
8.6 KiB
185 lines
8.6 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 |
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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 "GlyphCacheGL.h" |
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#ifdef MAGNUM_BUILD_DEPRECATED |
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#include <Corrade/Containers/Optional.h> |
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#endif |
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#include "Magnum/Image.h" |
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#include "Magnum/ImageView.h" |
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#include "Magnum/GL/TextureFormat.h" |
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#ifdef MAGNUM_BUILD_DEPRECATED |
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#include "Magnum/PixelFormat.h" |
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#endif |
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#if !defined(MAGNUM_TARGET_GLES) || (defined(MAGNUM_TARGET_GLES2) && !defined(MAGNUM_TARGET_WEBGL)) |
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#include "Magnum/PixelFormat.h" |
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#include "Magnum/GL/Context.h" |
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#include "Magnum/GL/Extensions.h" |
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#endif |
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#if defined(MAGNUM_TARGET_GLES2) && !defined(MAGNUM_TARGET_WEBGL) |
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#include "Magnum/GL/PixelFormat.h" |
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#endif |
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namespace Magnum { namespace Text { |
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GlyphCacheGL::GlyphCacheGL(const PixelFormat format, const Vector2i& size, const PixelFormat processedFormat, const Vector2i& processedSize, const Vector2i& padding): AbstractGlyphCache{format, size, processedFormat, processedSize, padding} { |
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#ifndef MAGNUM_TARGET_GLES |
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if(processedFormat == PixelFormat::R8Unorm) |
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MAGNUM_ASSERT_GL_EXTENSION_SUPPORTED(GL::Extensions::ARB::texture_rg); |
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#endif |
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/* Initialize the texture */ |
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_texture.setWrapping(GL::SamplerWrapping::ClampToEdge) |
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.setMinificationFilter(GL::SamplerFilter::Linear) |
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.setMagnificationFilter(GL::SamplerFilter::Linear); |
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/* ES2 special-casing. WebGL 1 has neither EXT_texture_rg nor |
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EXT_texture_storage so it can use the common code path without |
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issues. */ |
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#if defined(MAGNUM_TARGET_GLES2) && !defined(MAGNUM_TARGET_WEBGL) |
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/* Prefer to use Red instead of Luminance if available, as Luminance isn't |
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renderable */ |
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GL::TextureFormat textureFormat = GL::textureFormat(processedFormat); |
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GL::PixelFormat pixelFormat = GL::pixelFormat(processedFormat); |
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if(textureFormat == GL::TextureFormat::Luminance && GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>()) { |
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textureFormat = GL::TextureFormat::Red; |
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pixelFormat = GL::PixelFormat::Red; |
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} |
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/* And use setImage() instead of setStorage() if the format is unsized, as |
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EXT_texture_storage doesn't allow those */ |
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if(textureFormat == GL::TextureFormat::Red || |
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textureFormat == GL::TextureFormat::Luminance || |
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textureFormat == GL::TextureFormat::RG || |
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textureFormat == GL::TextureFormat::LuminanceAlpha || |
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textureFormat == GL::TextureFormat::RGB || |
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textureFormat == GL::TextureFormat::SRGB || |
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textureFormat == GL::TextureFormat::RGBA || |
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textureFormat == GL::TextureFormat::SRGBAlpha) |
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_texture.setImage(0, textureFormat, ImageView2D{pixelFormat, GL::PixelType::UnsignedByte, processedSize}); |
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else |
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_texture.setStorage(1, textureFormat, processedSize); |
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#else |
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_texture.setStorage(1, GL::textureFormat(processedFormat), processedSize); |
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#endif |
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} |
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GlyphCacheGL::GlyphCacheGL(const PixelFormat format, const Vector2i& size, const Vector2i& padding): GlyphCacheGL{format, size, format, size, padding} {} |
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#ifdef MAGNUM_BUILD_DEPRECATED |
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/* The unconditional Optional unwrap in these two may assert in rare cases. |
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Let's hope it doesn't in practice. */ |
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GlyphCacheGL::GlyphCacheGL(const GL::TextureFormat internalFormat, const Vector2i& size, const Vector2i& padding): GlyphCacheGL{*GL::genericPixelFormat(internalFormat), size, padding} {} |
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GlyphCacheGL::GlyphCacheGL(const GL::TextureFormat internalFormat, const Vector2i& size, const Vector2i& processedSize, const Vector2i& padding): GlyphCacheGL{*GL::genericPixelFormat(internalFormat), size, *GL::genericPixelFormat(internalFormat), processedSize, padding} {} |
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GlyphCacheGL::GlyphCacheGL(const Vector2i& size, const Vector2i& padding): GlyphCacheGL{PixelFormat::R8Unorm, size, padding} {} |
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GlyphCacheGL::GlyphCacheGL(const Vector2i& size, const Vector2i& processedSize, const Vector2i& padding): GlyphCacheGL{PixelFormat::R8Unorm, size, PixelFormat::R8Unorm, processedSize, padding} {} |
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#endif |
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GlyphCacheGL::GlyphCacheGL(NoCreateT) noexcept: AbstractGlyphCache{NoCreate}, _texture{NoCreate} {} |
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GlyphCacheFeatures GlyphCacheGL::doFeatures() const { return {}; } |
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void GlyphCacheGL::doSetImage(const Vector2i& offset, const ImageView2D& image) { |
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CORRADE_ASSERT(format() == processedFormat() && size() == processedSize(), |
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"Text::GlyphCacheGL::flushImage(): subclass expected to provide a doSetImage() implementation to handle different processed format or size", ); |
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/* On ES2 without EXT_unpack_subimage and on WebGL 1 there's no possibility |
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to upload just a slice of the input, upload the whole image instead by |
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ignoring the PixelStorage properties of the input */ |
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#ifdef MAGNUM_TARGET_GLES2 |
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#ifndef MAGNUM_TARGET_WEBGL |
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if(!GL::Context::current().isExtensionSupported<GL::Extensions::EXT::unpack_subimage>()) |
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#endif |
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{ |
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/* On ES2 if EXT_texture_rg is present, the single-channel texture |
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format is Red instead of Luminance. Have to duplicate the logic here |
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in addition to below because it's easier than extracting |
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formatExtra() and everything else from the view afterwards. */ |
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#ifndef MAGNUM_TARGET_WEBGL |
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if(image.format() == PixelFormat::R8Unorm && GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>()) { |
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_texture.setSubImage(0, {}, ImageView2D{GL::PixelFormat::Red, GL::PixelType::UnsignedByte, size().xy(), image.data()}); |
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} else |
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#endif |
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{ |
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_texture.setSubImage(0, {}, ImageView2D{image.format(), size().xy(), image.data()}); |
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} |
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#ifdef MAGNUM_TARGET_WEBGL |
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static_cast<void>(offset); |
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#endif |
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} |
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#ifndef MAGNUM_TARGET_WEBGL |
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else |
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#endif |
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#endif |
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#if !(defined(MAGNUM_TARGET_GLES2) && defined(MAGNUM_TARGET_WEBGL)) |
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{ |
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/* On ES2 if EXT_texture_rg is present, the single-channel texture |
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format is Red instead of Luminance */ |
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#ifdef MAGNUM_TARGET_GLES2 |
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if(image.format() == PixelFormat::R8Unorm && GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>()) { |
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_texture.setSubImage(0, offset, ImageView2D{image.storage(), GL::PixelFormat::Red, GL::PixelType::UnsignedByte, image.size(), image.data()}); |
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} else |
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#endif |
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{ |
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_texture.setSubImage(0, offset, image); |
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} |
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} |
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#endif |
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} |
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void GlyphCacheGL::doSetProcessedImage(const Vector2i& offset, const ImageView2D& image) { |
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ImageView2D imageToUse = image; |
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/* On ES2, R8Unorm maps to Luminance, but here it's actually Red if |
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EXT_texture_rg is supported. Reinterpret the image format in that |
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case. If the format is something else (such as RGBA8Unorm), no |
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reinterpret is done. WebGL doesn't have the EXT_texture_rg extension so |
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there it isn't done either. */ |
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#if defined(MAGNUM_TARGET_GLES2) && !defined(MAGNUM_TARGET_WEBGL) |
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if(processedFormat() == PixelFormat::R8Unorm && GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>()) { |
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/* This is checked inside setProcessedImage() already */ |
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CORRADE_INTERNAL_ASSERT(image.format() == PixelFormat::R8Unorm); |
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imageToUse = ImageView2D{image.storage(), GL::PixelFormat::Red, GL::PixelType::UnsignedByte, image.size(), image.data()}; |
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} |
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#endif |
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texture().setSubImage(0, offset, imageToUse); |
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} |
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#ifndef MAGNUM_TARGET_GLES |
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Image3D GlyphCacheGL::doProcessedImage() { |
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Image2D out = _texture.image(0, PixelFormat::R8Unorm); |
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return Image3D{out.format(), {out.size(), 1}, out.release()}; |
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} |
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#endif |
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}}
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