58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
//
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// ICO image header file for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 2022 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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// https://en.wikipedia.org/wiki/ICO_(file_format)
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// http://www.daubnet.com/en/file-format-ico
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#ifndef Fl_ICO_Image_H
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# define Fl_ICO_Image_H
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# include "Fl_BMP_Image.H"
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/**
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The Fl_ICO_Image class supports loading, caching, and drawing of Windows icon (.ico) files.
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*/
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class FL_EXPORT Fl_ICO_Image : public Fl_BMP_Image {
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public:
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/** Windows ICONDIRENTRY structure */
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struct IconDirEntry {
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int bWidth; ///< Image width
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int bHeight; ///< Image height
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int bColorCount; ///< Number of colors (0 if ≥ 8bpp)
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int bReserved; ///< Reserved
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int wPlanes; ///< Color Planes
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int wBitCount; ///< Bits per pixel
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int dwBytesInRes; ///< Resource size in bytes
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int dwImageOffset; ///< Offset to the image
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};
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Fl_ICO_Image(const char *filename, int id = -1, const unsigned char *data = NULL, const size_t datasize = 0);
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~Fl_ICO_Image();
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/** Returns the number of icons of various resolutions present in the ICO object. */
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int idcount() const { return idcount_; }
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/** Returns the array of idcount() loaded IconDirEntry structures. */
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IconDirEntry * const icondirentry() const { return icondirentry_; }
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private:
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int idcount_;
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struct IconDirEntry *icondirentry_;
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void load_ico_(class Fl_Image_Reader &rdr, int id);
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};
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#endif // Fl_ICO_Image_H
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