mirror of https://github.com/mosra/magnum.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
114 lines
5.1 KiB
114 lines
5.1 KiB
/* |
|
This file is part of Magnum. |
|
|
|
Copyright © 2010, 2011, 2012, 2013, 2014, 2015 |
|
Vladimír Vondruš <mosra@centrum.cz> |
|
|
|
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 "DistanceFieldGlyphCache.h" |
|
|
|
#include "Magnum/Context.h" |
|
#include "Magnum/Extensions.h" |
|
#include "Magnum/ImageView.h" |
|
#ifndef CORRADE_NO_ASSERT |
|
#include "Magnum/PixelFormat.h" |
|
#endif |
|
#include "Magnum/TextureFormat.h" |
|
#include "Magnum/TextureTools/DistanceField.h" |
|
|
|
namespace Magnum { namespace Text { |
|
|
|
DistanceFieldGlyphCache::DistanceFieldGlyphCache(const Vector2i& originalSize, const Vector2i& size, const UnsignedInt radius): |
|
#if !(defined(MAGNUM_TARGET_GLES) && defined(MAGNUM_TARGET_GLES2)) |
|
GlyphCache(TextureFormat::R8, originalSize, size, Vector2i(radius)), |
|
#elif !defined(MAGNUM_TARGET_WEBGL) |
|
/* Luminance is not renderable in most cases */ |
|
GlyphCache(Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_rg>() ? |
|
TextureFormat::Red : TextureFormat::RGB, originalSize, size, Vector2i(radius)), |
|
#else |
|
GlyphCache(TextureFormat::RGB, originalSize, size, Vector2i(radius)), |
|
#endif |
|
scale(Vector2(size)/Vector2(originalSize)), radius(radius) |
|
{ |
|
#ifndef MAGNUM_TARGET_GLES |
|
MAGNUM_ASSERT_EXTENSION_SUPPORTED(Extensions::GL::ARB::texture_rg); |
|
#endif |
|
|
|
#if defined(MAGNUM_TARGET_GLES2) && !defined(MAGNUM_TARGET_WEBGL) |
|
/* Luminance is not renderable in most cases */ |
|
if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_rg>()) |
|
Warning() << "Text::DistanceFieldGlyphCache:" << Extensions::GL::EXT::texture_rg::string() << "not supported, using inefficient RGB format for glyph cache texture"; |
|
#endif |
|
} |
|
|
|
void DistanceFieldGlyphCache::setImage(const Vector2i& offset, const ImageView2D& image) { |
|
#if !(defined(MAGNUM_TARGET_GLES) && defined(MAGNUM_TARGET_GLES2)) |
|
const TextureFormat internalFormat = TextureFormat::R8; |
|
CORRADE_ASSERT(image.format() == PixelFormat::Red, |
|
"Text::DistanceFieldGlyphCache::setImage(): expected" << PixelFormat::Red << "but got" << image.format(), ); |
|
#else |
|
TextureFormat internalFormat; |
|
#ifndef MAGNUM_TARGET_WEBGL |
|
if(Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_rg>()) { |
|
internalFormat = TextureFormat::Red; |
|
CORRADE_ASSERT(image.format() == PixelFormat::Red, |
|
"Text::DistanceFieldGlyphCache::setImage(): expected" << PixelFormat::Red << "but got" << image.format(), ); |
|
} else |
|
#endif |
|
{ |
|
internalFormat = TextureFormat::Luminance; |
|
CORRADE_ASSERT(image.format() == PixelFormat::Luminance, |
|
"Text::DistanceFieldGlyphCache::setImage(): expected" << PixelFormat::Luminance << "but got" << image.format(), ); |
|
} |
|
#endif |
|
|
|
Texture2D input; |
|
input.setWrapping(Sampler::Wrapping::ClampToEdge) |
|
.setMinificationFilter(Sampler::Filter::Linear) |
|
.setMagnificationFilter(Sampler::Filter::Linear) |
|
.setImage(0, internalFormat, image); |
|
|
|
/* Create distance field from input texture */ |
|
TextureTools::distanceField(input, texture(), Range2Di::fromSize(offset*scale, image.size()*scale), radius, image.size()); |
|
} |
|
|
|
void DistanceFieldGlyphCache::setDistanceFieldImage(const Vector2i& offset, const ImageView2D& image) { |
|
#if !(defined(MAGNUM_TARGET_GLES) && defined(MAGNUM_TARGET_GLES2)) |
|
CORRADE_ASSERT(image.format() == PixelFormat::Red, |
|
"Text::DistanceFieldGlyphCache::setDistanceFieldImage(): expected" << PixelFormat::Red << "but got" << image.format(), ); |
|
#else |
|
#ifndef MAGNUM_TARGET_WEBGL |
|
if(Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_rg>()) |
|
CORRADE_ASSERT(image.format() == PixelFormat::Red, |
|
"Text::DistanceFieldGlyphCache::setDistanceFieldImage(): expected" << PixelFormat::Red << "but got" << image.format(), ); |
|
else |
|
#endif |
|
{ |
|
/* Luminance is not renderable in most cases */ |
|
CORRADE_ASSERT(image.format() == PixelFormat::RGB, |
|
"Text::DistanceFieldGlyphCache::setDistanceFieldImage(): expected" << PixelFormat::RGB << "but got" << image.format(), ); |
|
} |
|
#endif |
|
|
|
texture().setSubImage(0, offset, image); |
|
} |
|
|
|
}}
|
|
|