113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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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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if (ImageFileFormat* format = findImageFormatForStream (input))
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return format->decodeImage (input);
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return Image();
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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();
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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();
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}
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} // namespace juce
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