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107 lines
2.8 KiB
107 lines
2.8 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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*/
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struct DefaultImageFormats
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{
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static ImageFileFormat** get()
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{
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static DefaultImageFormats formats;
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return formats.formats;
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}
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private:
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DefaultImageFormats() noexcept
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{
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formats[0] = &png;
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formats[1] = &jpg;
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formats[2] = &gif;
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formats[3] = nullptr;
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}
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PNGImageFormat png;
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JPEGImageFormat jpg;
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GIFImageFormat gif;
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ImageFileFormat* formats[4];
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};
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ImageFileFormat* ImageFileFormat::findImageFormatForStream (InputStream& input)
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{
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const int64 streamPos = input.getPosition();
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for (ImageFileFormat** i = DefaultImageFormats::get(); *i != nullptr; ++i)
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{
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const bool found = (*i)->canUnderstand (input);
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input.setPosition (streamPos);
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if (found)
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return *i;
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}
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return nullptr;
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}
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ImageFileFormat* ImageFileFormat::findImageFormatForFileExtension (const File& file)
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{
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for (ImageFileFormat** i = DefaultImageFormats::get(); *i != nullptr; ++i)
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if ((*i)->usesFileExtension (file))
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return *i;
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return nullptr;
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}
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//==============================================================================
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Image ImageFileFormat::loadFrom (InputStream& input)
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{
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ImageFileFormat* const format = findImageFormatForStream (input);
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if (format != nullptr)
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return format->decodeImage (input);
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return Image::null;
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}
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Image ImageFileFormat::loadFrom (const File& file)
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{
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FileInputStream stream (file);
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if (stream.openedOk())
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{
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BufferedInputStream b (stream, 8192);
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return loadFrom (b);
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}
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return Image::null;
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}
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Image ImageFileFormat::loadFrom (const void* rawData, const size_t numBytes)
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{
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if (rawData != nullptr && numBytes > 4)
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{
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MemoryInputStream stream (rawData, numBytes, false);
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return loadFrom (stream);
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}
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return Image::null;
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}
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