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#ifndef IMAGE_H_INCLUDED
#define IMAGE_H_INCLUDED
#include <strings.h>
#include "pm_c_util.h"
#include "ximageinfo.h"
typedef struct rgbmap {
unsigned int size; /* size of RGB map */
unsigned int used; /* number of colors used in RGB map */
bool compressed; /* image uses colormap fully */
Intensity * red; /* color values in X style */
Intensity * grn;
Intensity * blu;
} RGBMap;
typedef struct Image {
unsigned int type; /* type of image */
RGBMap rgb; /* RGB map of image if IRGB type */
unsigned int width; /* width of image in pixels */
unsigned int height; /* height of image in pixels */
unsigned int depth; /* depth of image in bits if IRGB type */
unsigned int pixlen; /* length of pixel if IRGB type */
unsigned char * data; /* data rounded to full byte for each row */
} Image;
#define IBAD 0 /* invalid image (used when freeing) */
#define IBITMAP 1 /* image is a bitmap */
#define IRGB 2 /* image is RGB */
#define ITRUE 3 /* image is true color */
#define BITMAPP(IMAGE) ((IMAGE)->type == IBITMAP)
#define RGBP(IMAGE) ((IMAGE)->type == IRGB)
#define TRUEP(IMAGE) ((IMAGE)->type == ITRUE)
#define TRUE_RED(PIXVAL) (((PIXVAL) & 0xff0000) >> 16)
#define TRUE_GRN(PIXVAL) (((PIXVAL) & 0xff00) >> 8)
#define TRUE_BLU(PIXVAL) ((PIXVAL) & 0xff)
#define RGB_TO_TRUE(R,G,B) \
(((unsigned int)((R) & 0xff00) << 8) | ((unsigned int)(G) & 0xff00) | \
((unsigned int)(B) >> 8))
unsigned long
colorsToDepth(unsigned long const ncolors);
void
assertGoodImage(Image * const imageP);
Image *
newBitImage(unsigned int const width,
unsigned int const height);
Image *
newRGBImage(unsigned int const width,
unsigned int const height,
unsigned int const depth);
Image *
newTrueImage(unsigned int const width,
unsigned int const height);
void
freeImage(Image * const imageP);
unsigned int
depthToColors(unsigned int const depth);
extern unsigned short RedIntensity[];
extern unsigned short GreenIntensity[];
extern unsigned short BlueIntensity[];
static __inline__ unsigned int
colorIntensity(unsigned int const red,
unsigned int const grn,
unsigned int const blu) {
/*----------------------------------------------------------------------------
Return the (approximate) intensity of a color.
-----------------------------------------------------------------------------*/
return (RedIntensity[red / 256] +
GreenIntensity[grn / 256] +
BlueIntensity[blu / 256]);
}
#endif
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