draw.h

#ifndef DRAW_H_INCLUDED
#define DRAW_H_INCLUDED

#include <GL/gl.h>
#include <GL/glext.h>
#include <stdint.h>


///OGL texture structs
//textures are the format OGL blits, non editable data -(loaded sprites/images)
struct OGL_Texture{
    protected:
    bool texture_generated;

    public:
    GLuint Texture_ID;
    uint32_t w,h;

    void gen_texture(uint16_t w, uint16_t h, uint8_t *PixData);

    OGL_Texture();
    ~OGL_Texture();
};
//surfaces contain editable pixel data, can be cast to textures for blitting -(effects, debug/primitive data draws)
struct OGL_Surface : OGL_Texture{
    uint32_t w,h;
    uint8_t bpp;
    uint8_t *PixData;

    void Create_Surface(uint16_t w,uint16_t h, char bpp);
    void Clear_Surface(uint8_t r, uint8_t g, uint8_t b, uint8_t a=255);
    void Set_Surface_AlphaKey(uint8_t r, uint8_t g, uint8_t b);
    void gen_texture();

    OGL_Surface();
    ~OGL_Surface();
};

OGL_Texture *Texture_Cast(OGL_Surface *Surface);

////////
//BLIT//
////////
enum Image_Options{
    IMG_NORM  = 0,
    IMG_HFLIP = 1,
    IMG_VFLIP = 2,
    IMG_ADD_BLEND = 3
};
void DrawImage(OGL_Texture *Texture, int dx, int dy, float rot=0.0,float scale_x=1.0,float scale_y=1.0,float alpha=1.0,int options=0);
void DrawSubImage(OGL_Texture *Texture, int sx, int sy, int sw, int sh, int dx, int dy, float rot=0.0,float scale_x=1.0,float scale_y=1.0,float alpha=1.0,int options=0);

//////////
//COLOUR//
//////////
uint32_t make_col(uint8_t r, uint8_t g, uint8_t b, uint8_t a);
uint32_t make_col(uint8_t r, uint8_t g, uint8_t b);

///////////////////
//DRAW PRIMITIVES//
///////////////////
bool putpixel(OGL_Surface *Surface, int x, int y, uint32_t col);
bool getpixel(OGL_Surface *Surface, int x, int y, uint32_t &col);
//
void hline(OGL_Surface *Surface, int x, int y, int w, uint32_t col);
void vline(OGL_Surface *Surface, int x, int y, int h, uint32_t col);
void line(OGL_Surface *Surface, int x1, int y1, int x2, int y2, uint32_t col);
void box(OGL_Surface *Surface, int x, int y, int w, int h, uint32_t col);
void rect(OGL_Surface *Surface, int x, int y, int w, int h, uint32_t col);
void polyline(OGL_Surface *Surface, unsigned char n, int points[], uint32_t col);
void polygon(OGL_Surface *Surface, unsigned char n, int points[], uint32_t col);
void circle(OGL_Surface *Surface, int x0, int y0, int radius, uint32_t col);
void circle_fill(OGL_Surface *Surface, int x0, int y0, int radius, uint32_t col);
//

#endif // DRAW_H_INCLUDED