#ifndef _GDS_H_
#define _GDS_H_

#include <stdint.h>
#include <stdbool.h>
#include "Config.h"

/* NOTE for drivers:
 The build-in DrawPixel(Fast), DrawCBR and ClearWindow have optimized for 1 bit 
 and 4 bits grayscale screen depth and 8, 16, 24 color. For any other type of screen, 
 DrawCBR and ClearWindow default to use DrawPixel, which is very sub-optimal. For 
 other depth, you  must supply the DrawPixelFast. The built-in 1 bit depth function 
 are only for screen with vertical framing (1 byte = 8 lines). For example SSD1326 in 
 monochrome mode is not such type of screen, SH1106 and SSD1306 are
*/

// this is an ordered enum, do not change!
enum { GDS_MONO = 0, GDS_GRAYSCALE, GDS_RGB332, GDS_RGB444, GDS_RGB555, GDS_RGB565, GDS_RGB666, GDS_RGB888 };

#define GDS_COLOR_BLACK (0)
#define GDS_COLOR_WHITE (-1)
#define GDS_COLOR_XOR (256)

struct GDS_Device;
struct GDS_FontDef;
struct GDS_BacklightPWM {
    int Channel, Timer, Max;
    bool Init;
};
struct GDS_Layout {
    bool HFlip, VFlip;
    bool Rotate;
    bool Invert;
    bool ColorSwap;
};

typedef struct GDS_Device* GDS_DetectFunc(sys_display_config* Driver, struct GDS_Device* Device);

struct GDS_Device* GDS_AutoDetect(sys_display_config* Driver, GDS_DetectFunc* DetectFunc[], struct GDS_BacklightPWM* PWM);

void GDS_SetContrast(struct GDS_Device* Device, uint8_t Contrast);
void GDS_DisplayOn(struct GDS_Device* Device);
void GDS_DisplayOff(struct GDS_Device* Device);
void GDS_Update(struct GDS_Device* Device);
void GDS_SetLayout(struct GDS_Device* Device, struct GDS_Layout* Layout);
void GDS_SetDirty(struct GDS_Device* Device);
int GDS_GetWidth(struct GDS_Device* Device);
void GDS_SetTextWidth(struct GDS_Device* Device, int TextWidth);
int GDS_GetHeight(struct GDS_Device* Device);
int GDS_GetDepth(struct GDS_Device* Device);
int GDS_GetMode(struct GDS_Device* Device);
int GDS_GrayMap(struct GDS_Device* Device, uint8_t Level);
void GDS_ClearExt(struct GDS_Device* Device, bool full, ...);
void GDS_Clear(struct GDS_Device* Device, int Color);
void GDS_ClearWindow(struct GDS_Device* Device, int x1, int y1, int x2, int y2, int Color);

#endif