juce_ImageFileFormat.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   JUCE is an open source library subject to commercial or open-source
   licensing.
 
   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy
 
   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce
{
 
//==============================================================================
class JUCE_API  ImageFileFormat
{
protected:
    //==============================================================================
    ImageFileFormat() = default;
 
public:
    virtual ~ImageFileFormat() = default;
 
    //==============================================================================
    virtual String getFormatName() = 0;

    virtual bool canUnderstand (InputStream& input) = 0;

    virtual bool usesFileExtension (const File& possibleFile) = 0;

    virtual Image decodeImage (InputStream& input) = 0;
 
    //==============================================================================
    virtual bool writeImageToStream (const Image& sourceImage,
                                     OutputStream& destStream) = 0;
 
    //==============================================================================
    static ImageFileFormat* findImageFormatForStream (InputStream& input);

    static ImageFileFormat* findImageFormatForFileExtension (const File& file);
 
    //==============================================================================
    static Image loadFrom (InputStream& input);

    static Image loadFrom (const File& file);

    static Image loadFrom (const void* rawData,
                           size_t numBytesOfData);
};
 
//==============================================================================
class JUCE_API  PNGImageFormat  : public ImageFileFormat
{
public:
    //==============================================================================
    PNGImageFormat();
    ~PNGImageFormat() override;
 
    //==============================================================================
    String getFormatName() override;
    bool usesFileExtension (const File&) override;
    bool canUnderstand (InputStream&) override;
    Image decodeImage (InputStream&) override;
    bool writeImageToStream (const Image&, OutputStream&) override;
};
 
 
//==============================================================================
class JUCE_API  JPEGImageFormat  : public ImageFileFormat
{
public:
    //==============================================================================
    JPEGImageFormat();
    ~JPEGImageFormat() override;
 
    //==============================================================================
    void setQuality (float newQuality);
 
    //==============================================================================
    String getFormatName() override;
    bool usesFileExtension (const File&) override;
    bool canUnderstand (InputStream&) override;
    Image decodeImage (InputStream&) override;
    bool writeImageToStream (const Image&, OutputStream&) override;
 
private:
    float quality;
};
 
//==============================================================================
class JUCE_API  GIFImageFormat  : public ImageFileFormat
{
public:
    //==============================================================================
    GIFImageFormat();
    ~GIFImageFormat() override;
 
    //==============================================================================
    String getFormatName() override;
    bool usesFileExtension (const File&) override;
    bool canUnderstand (InputStream&) override;
    Image decodeImage (InputStream&) override;
    bool writeImageToStream (const Image&, OutputStream&) override;
};
 
} // namespace juce