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100 lines
4.2 KiB
100 lines
4.2 KiB
/* |
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 |
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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 "GlyphCache.h" |
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#include "Magnum/Context.h" |
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#include "Magnum/Extensions.h" |
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#include "Magnum/Image.h" |
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#include "Magnum/TextureFormat.h" |
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#include "Magnum/TextureTools/Atlas.h" |
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namespace Magnum { namespace Text { |
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GlyphCache::GlyphCache(const TextureFormat internalFormat, const Vector2i& size, const Vector2i& padding): GlyphCache{internalFormat, size, size, padding} {} |
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GlyphCache::GlyphCache(const TextureFormat internalFormat, const Vector2i& originalSize, const Vector2i& size, const Vector2i& padding): _size(originalSize), _padding(padding) { |
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initialize(internalFormat, size); |
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} |
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GlyphCache::GlyphCache(const Vector2i& size, const Vector2i& padding): GlyphCache{size, size, padding} {} |
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GlyphCache::GlyphCache(const Vector2i& originalSize, const Vector2i& size, const Vector2i& padding): _size(originalSize), _padding(padding) { |
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#ifndef MAGNUM_TARGET_GLES |
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MAGNUM_ASSERT_EXTENSION_SUPPORTED(Extensions::GL::ARB::texture_rg); |
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#endif |
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/** @todo Is there any better way to select proper sized/unsized format on ES2? */ |
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#ifndef MAGNUM_TARGET_GLES2 |
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const TextureFormat internalFormat = TextureFormat::R8; |
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#elif !defined(MAGNUM_TARGET_WEBGL) |
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TextureFormat internalFormat; |
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if(Context::current().isExtensionSupported<Extensions::GL::EXT::texture_rg>()) { |
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internalFormat = Context::current().isExtensionSupported<Extensions::GL::EXT::texture_storage>() ? |
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TextureFormat::R8 : TextureFormat::Red; |
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} else internalFormat = TextureFormat::Luminance; |
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#else |
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const TextureFormat internalFormat = TextureFormat::Luminance; |
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#endif |
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initialize(internalFormat, size); |
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} |
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GlyphCache::~GlyphCache() = default; |
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void GlyphCache::initialize(const TextureFormat internalFormat, const Vector2i& size) { |
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/* Initialize texture */ |
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_texture.setWrapping(Sampler::Wrapping::ClampToEdge) |
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.setMinificationFilter(Sampler::Filter::Linear) |
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.setMagnificationFilter(Sampler::Filter::Linear) |
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.setStorage(1, internalFormat, size); |
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/* Default "Not Found" glyph */ |
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glyphs.insert({0, {}}); |
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} |
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std::vector<Range2Di> GlyphCache::reserve(const std::vector<Vector2i>& sizes) { |
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CORRADE_ASSERT((glyphs.size() == 1 && glyphs.at(0) == std::pair<Vector2i, Range2Di>()), |
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"Text::GlyphCache::reserve(): reserving space in non-empty cache is not yet implemented", {}); |
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glyphs.reserve(glyphs.size() + sizes.size()); |
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return TextureTools::atlas(_size, sizes, _padding); |
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} |
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void GlyphCache::insert(const UnsignedInt glyph, const Vector2i& position, const Range2Di& rectangle) { |
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const std::pair<Vector2i, Range2Di> glyphData = {position-_padding, rectangle.padded(_padding)}; |
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/* Overwriting "Not Found" glyph */ |
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if(glyph == 0) glyphs[0] = glyphData; |
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/* Inserting new glyph */ |
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else CORRADE_INTERNAL_ASSERT_OUTPUT(glyphs.insert({glyph, glyphData}).second); |
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} |
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void GlyphCache::setImage(const Vector2i& offset, const ImageView2D& image) { |
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/** @todo some internalformat/format checking also here (if querying internal format is not slow) */ |
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_texture.setSubImage(0, offset, image); |
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} |
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}}
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