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#ifndef _IOS_IMG_PROCESS
#define _IOS_IMG_PROCESS
#include "glSDL.h"
typedef struct _RGBA {
Uint8 red;
Uint8 green;
Uint8 blue;
Uint8 alpha;
} RGBA;
typedef struct _HSVA {
float hue;
float saturation;
float value;
Uint8 alpha;
} HSVA;
/* Extracting color components from a 32-bit color value
* pre: SDL_Locked(surface) */
RGBA iim_surface_get_rgba(SDL_Surface *surface, Uint32 x, Uint32 y);
/* pre: SDL_Locked(surface) */
void iim_surface_set_rgb(SDL_Surface *surface,
Uint32 x, Uint32 y, RGBA c);
/* pre: SDL_Locked(surface) */
void iim_surface_set_rgba(SDL_Surface *surface,
Uint32 x, Uint32 y, RGBA c);
//-- RGB<->HSV conversion
//-- RGB, each 0 to 255
//-- H = 0.0 to 360.0 (corresponding to 0..360.0 degrees around hexcone)
//-- S = 0.0 (shade of gray) to 1.0 (pure color)
//-- V = 0.0 (black) to 1.0 (white)
//-- Based on C Code in "Computer Graphics -- Principles and Practice,"
//-- Foley et al, 1996, pp. 592,593.
HSVA iim_rgba2hsva(RGBA c);
RGBA iim_hsva2rgba(HSVA c);
typedef struct {
SDL_Surface *surf;
int w;
int h;
bool isAlpha;
} IIM_Surface;
IIM_Surface *iim_surface_shift_hue(IIM_Surface *src, float hue_offset);
IIM_Surface *iim_surface_set_value(IIM_Surface *src, float value);
void iim_surface_convert_to_gray(IIM_Surface *src);
IIM_Surface * IIM_Load_DisplayFormat (const char *path);
IIM_Surface * IIM_Load_DisplayFormatAlpha (const char *path);
void IIM_Free(IIM_Surface *img);
IIM_Surface * IIM_RegisterImg(SDL_Surface *img, bool isAlpha);
void IIM_ReConvertAll(void);
#endif
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