#include "pm_c_util.h"

#define ICONDIR_TYPE_ICO (1)

/*  windows icon structures  */

struct IconDirEntry {

    uint16_t width;               /* image width in pixels 0 == 256 */

    uint16_t height;              /* image height in pixels 0 == 256 */

    uint8_t  color_count;         /* 0 if bits_per_pixel >= 8 */

    uint8_t  zero;                /* 0 */

    uint16_t color_planes;        /* 1 */

    uint16_t bits_per_pixel;      /* allowed values: 1, 4, 8, 16 or 32 (1) */

    uint32_t size;                /* size of image */

    uint32_t offset;              /* file offset of image */

    uint16_t index;               /* extra field (not in file) */

};

/*  (1) This is from

 *  http://blogs.msdn.com/b/oldnewthing/archive/2010/10/19/10077610.aspx.

 *

 *  However, the bpp value in the icon directory is used as a hint for

 *  image selection only.  It seems to be legal to set this value to

 *  zero, and e.g. in SHELL32.DLL of Win98SE, there are many 8bpp

 *  images described as 24 bit images in the icon directory.

 *

 *  The bpp value of image 1 in icon 150 in SHELL32.DLL of WinXP is 24

 *  (in header and BMP).  This may be a bug, as the 32 x 32 x 8 image

 *  is missing, but it shows the Windows icon rendering engine is able

 *  to cope with 24 bit images).

 *

 *  16bpp icons are at least rare in the wild.

 */

struct IconDir {

    uint16_t zero;                /* 0 */

    uint16_t type;                /* 1 */

    uint16_t count;               /* number of images in icon */

    unsigned int entriesAllocCt;     /* # of allocated slots in 'entries'*/

    struct IconDirEntry * entries;   /* one entry for each image */

};

/*  BMP image structures  */

struct BitmapInfoHeader {

    uint32_t header_size;         /* >= 40 */

    int32_t  bm_width;

    int32_t  bm_height;

    uint16_t color_planes;

    uint16_t bits_per_pixel;

    uint32_t compression_method;

    uint32_t image_size;

    int32_t  horizontal_resolution; /* pixels per meter (!) */

    int32_t  vertical_resolution;   /* pixels per meter (!) */

    uint32_t colors_in_palette;

    uint32_t important_colors;

    bool top_down;                /* extra field (not in file) */

};

typedef enum {

    BI_RGB       = 0,

    BI_BITFIELDS = 3

} BiCompression;

/*  PNG image structures  */

#define PNG_HEADER { 0x89, 'P', 'N', 'G', '\r', '\n', 0x1A /* ^Z */, '\n' }

struct PngIhdr {

    uint32_t length;              /* 13 */

    uint32_t signature;           /* "IHDR" */

    uint32_t width;               /* image width in pixels */

    uint32_t height;              /* image height in pixels */

    uint8_t  bit_depth;           /* depth per channel */

    uint8_t  color_type;          /* recognized values: 0, 2, 3, 4 and 6 */

    uint8_t  compression;

    uint8_t  filter;

    uint8_t  interlace;

    uint32_t crc;

};