graphics_sdl2.c File Reference

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

Macros
#define	RGB_R(i)
#define	RGB_G(i)
#define	RGB_B(i)

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

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

)

Value:

(i & 0xFF)

RGB_G

#define RGB_G

(

i

)

Value:

((i >> 8) & 0xFF)

RGB_R

#define RGB_R

(

i

)

Value:

((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.