graphics_sdl2.c File Reference

#include "../graphics.h"
#include <SDL2/SDL.h>
#include <stdint.h>

Macros
#define	RGB_R(i)   ((i >> 16) & 0xFF)
#define	RGB_G(i)   ((i >> 8) & 0xFF)
#define	RGB_B(i)   (i & 0xFF)

Functions
void	c8_deinit_graphics (void)
	Deinitialize the graphics library. More...
uint8_t	c8_init_graphics (void)
	Initialize the graphics library. More...
void	c8_render (c8_display_t *display, int *colors)
int	c8_tick (int *key, int clockSpeed)
	Process keypresses and delay based on clockspeed. More...

Detailed Description

SDL2 graphics implementation. When SDL2 is defined, overrides weak graphics utility function definitions in graphics.c.

Macro Definition Documentation

RGB_B

#define RGB_B

(

i

)

(i & 0xFF)

RGB_G

#define RGB_G

(

i

)

((i >> 8) & 0xFF)

RGB_R

#define RGB_R

(

i

)

((i >> 16) & 0xFF)

Function Documentation

c8_deinit_graphics()

void c8_deinit_graphics

(

void

)

Deinitialize the graphics library.

c8_init_graphics()

uint8_t c8_init_graphics

(

void

)

Initialize the graphics library.

Returns

1 if successful, 0 otherwise.

c8_render()

void c8_render	(	c8_display_t *	display,
		int *	colors
	)

Render the given display to the SDL2 window.

Parameters

display	display_t to render
colors	colors to render

c8_tick()

int c8_tick	(	int *	key,
		int	clockSpeed
	)

Process keypresses and delay based on clockspeed.

If a relevant key is pressed or released (see keyMap in this file), this function will update key accordingly.

Parameters

key	pointer to int arr of keys
clockSpeed	instructions per second

Returns

-2 if quitting, -1 if no key was pressed/released, else returns value of key pressed/released.