mirror of
https://github.com/juce-framework/JUCE.git
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136 lines
3.8 KiB
C++
136 lines
3.8 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-10 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online 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.rawmaterialsoftware.com/juce for more information.
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==============================================================================
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*/
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#include "../../../core/juce_StandardHeader.h"
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BEGIN_JUCE_NAMESPACE
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#include "juce_ImageFileFormat.h"
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#include "../../../io/streams/juce_MemoryInputStream.h"
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#include "../../../io/files/juce_FileInputStream.h"
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#include "../../../io/streams/juce_BufferedInputStream.h"
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#include "image_file_formats/juce_GIFLoader.h"
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//==============================================================================
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class GIFImageFormat : public ImageFileFormat
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{
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public:
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GIFImageFormat() {}
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~GIFImageFormat() {}
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const String getFormatName()
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{
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return "GIF";
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}
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bool canUnderstand (InputStream& in)
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{
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const int bytesNeeded = 4;
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char header [bytesNeeded];
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return (in.read (header, bytesNeeded) == bytesNeeded)
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&& header[0] == 'G'
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&& header[1] == 'I'
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&& header[2] == 'F';
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}
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Image* decodeImage (InputStream& in)
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{
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const ScopedPointer <GIFLoader> loader (new GIFLoader (in));
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return loader->getImage();
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}
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bool writeImageToStream (const Image& /*sourceImage*/, OutputStream& /*destStream*/)
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{
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return false;
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}
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};
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//==============================================================================
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ImageFileFormat* ImageFileFormat::findImageFormatForStream (InputStream& input)
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{
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static PNGImageFormat png;
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static JPEGImageFormat jpg;
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static GIFImageFormat gif;
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ImageFileFormat* formats[4];
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int numFormats = 0;
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formats [numFormats++] = &png;
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formats [numFormats++] = &jpg;
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formats [numFormats++] = &gif;
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const int64 streamPos = input.getPosition();
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for (int i = 0; i < numFormats; ++i)
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{
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const bool found = formats[i]->canUnderstand (input);
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input.setPosition (streamPos);
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if (found)
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return formats[i];
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}
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return 0;
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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 != 0)
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return format->decodeImage (input);
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return 0;
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}
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Image* ImageFileFormat::loadFrom (const File& file)
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{
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InputStream* const in = file.createInputStream();
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if (in != 0)
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{
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BufferedInputStream b (in, 8192, true);
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return loadFrom (b);
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}
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return 0;
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}
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Image* ImageFileFormat::loadFrom (const void* rawData, const int numBytes)
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{
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if (rawData != 0 && 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 0;
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}
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END_JUCE_NAMESPACE
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