Category : Printer + Display Graphics
Archive   : TIFGIF.ZIP
Filename : GIFWRITE.H

short Create_GIF (
/*
* Function:
* Create a 1-image GIF image-set. The size of the screen will be the
* same as the image.
*
* Inputs:
*/
short (*read_pixel)(void), /* ptr to caller's pixel reader */
short (*write_byte)(unsigned char), /* ptr to caller's byte writer */
short width, /* width of image in pixels */
short height, /* height of image in pixels */
short cr, /* bits of color resolution (1..8) */
short interlaced, /* interlaced flag */
short bp, /* bits per pixel (1..8) */
short normalize, /* normalize the color map */
struct ColorEntry color_map[] ); /* ptr to color map */

short Write_Screen_Desc (
/*
* Function:
* Write the GIF signature, the screen description, and the optional
* color map.
*
* Inputs:
*/
short (*write_byte)(unsigned char), /* ptr to caller's byte writer */
short width, /* width of the screen in pixels */
short height, /* height of the screen in pixels */
short cr, /* bits of color resolution (1..8) */
short fill_color, /* pixel value used to fill the background */
short bp, /* bits per pixel (1..8) */
short normalize, /* normalize the color map */
struct ColorEntry color_map[] ); /* ptr to the optional color map */
/*
* Returns:
* 0 = OK, else error code
*/

short Write_Image_Desc (
/*
* Function:
* Write the image description and optional local color map.
*
* Inputs:
*/
short (*write_byte)(unsigned char), /* ptr to caller's byte writer */
short left_edge, /* (left_edge, top_edge) is the upper left */
short top_edge, /* position in pixels of the image */
short width, /* width of the image in pixels */
short height, /* height of the image in pixels */
short cr, /* bits of color resolution (1..8) */
short interlaced, /* 1 = interlace the image */
short bp, /* bits per pixel for this image */
short normalize, /* normalize the color map */
struct ColorEntry color_map[] ); /* ptr to local color map */
/*
* Returns:
* 0 = OK, else error code
*/