/*
    This file is part of icoformat, a Windows Icon (ICO) File Format
    plugin for Adobe Photoshop
    Copyright (C) 2002-2010 Toby Thain, toby@telegraphics.com.au

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by  
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License  
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifdef WIN32
	#include <windows.h>
#else
	// from winnt.h
	typedef long LONG;
	// from windefs.h
	typedef unsigned long DWORD;
	typedef unsigned char BYTE;
	typedef unsigned short WORD;

    //#pragma options align=mac68k

	// from wingdi.h
	typedef struct {
			DWORD   biSize;
			LONG    biWidth;
			LONG    biHeight;
			WORD    biPlanes;
			WORD    biBitCount;
			DWORD   biCompression;
			DWORD   biSizeImage;
			LONG    biXPelsPerMeter;
			LONG    biYPelsPerMeter;
			DWORD   biClrUsed;
			DWORD   biClrImportant;
	} BITMAPINFOHEADER,*LPBITMAPINFOHEADER,*PBITMAPINFOHEADER;
	
	// must be packed as consecutive bytes!
	typedef struct {
        BYTE    rgbBlue;
        BYTE    rgbGreen;
        BYTE    rgbRed;
        BYTE    rgbReserved;
	} RGBQUAD;      

    //#pragma options align=reset

#endif

#define PNG_MAGIC 0x474e5089  // check biSize field against this

// these structures are extracted from MSDN document "Icons in Win32"
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwui/html/msdn_icons.asp

typedef struct{
    BYTE        bWidth;          // Width, in pixels, of the image
    BYTE        bHeight;         // Height, in pixels, of the image
    BYTE        bColorCount;     // Number of colors in image (0 if >=8bpp)
    BYTE        bReserved;       // Reserved ( must be 0)
    WORD        wPlanes;         // Color Planes
    WORD        wBitCount;       // Bits per pixel
    DWORD       dwBytesInRes;    // How many bytes in this resource?
    DWORD       dwImageOffset;   // Where in the file is this image?
} ICONDIRENTRY, *LPICONDIRENTRY;

enum{
	IDTYPE_ICON = 1, // idType signature
	IDTYPE_CUR = 2,
	SIZEOF_ICONDIRENTRY = 16,
	SIZEOF_BMIHEADER = 40,
	SIZEOF_ICONDIR = 6,
	FIRST_ICONDIRENTRY = SIZEOF_ICONDIR
};

typedef struct{
    WORD           idReserved;   // Reserved (must be 0)
    WORD           idType;       // Resource Type (1 for icons)
    WORD           idCount;      // How many images?
    ICONDIRENTRY   idEntries[1]; // An entry for each image (idCount of 'em)
} ICONDIR, *LPICONDIR;

typedef struct{
   BITMAPINFOHEADER   icHeader;      // DIB header
   RGBQUAD         icColors[1];   // Color table
   BYTE            icXOR[1];      // DIB bits for XOR mask
   BYTE            icAND[1];      // DIB bits for AND mask
} ICONIMAGE, *LPICONIMAGE;

// rows are padded to multiples of 4 bytes
#define ICONROWBYTES(bits) ( ( ((bits)+31)/8 ) & -4 ) 
#define INCHES_PER_METRE (1000./25.4)
#define DEFAULT_RES (72L<<16)