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sdl.c
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sdl.c
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#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#ifdef _WIN32
#include <SDL.h>
#else
#include <SDL2/SDL.h>
#endif
#include "sdl.h"
SDL_Window * gWindow = NULL;
SDL_Surface * gScreenSurface = NULL;
bool GFX_Init()
{
bool success = true;
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
fprintf(stderr,"SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
success = false;
}
else
{
gWindow = SDL_CreateWindow("CHIP-8 Emulator",SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, GFX_WIDTH, GFX_HEIGHT,SDL_WINDOW_SHOWN);
if(gWindow == NULL)
{
fprintf(stderr,"Window could not be created! SDL_Error: %s\n", SDL_GetError());
success = false;
}
else
{
gScreenSurface = SDL_GetWindowSurface(gWindow);
SDL_FillRect(gScreenSurface, NULL,SDL_MapRGB(gScreenSurface->format, 0, 0, 0));
}
}
return success;
}
void GFX_Close()
{
SDL_DestroyWindow(gWindow);
gWindow = NULL;
SDL_Quit();
}
void GFX_Draw(uint8_t gfx[])
{
SDL_LockSurface(gScreenSurface);
for (int i = 0; i < GFX_HEIGHT; i++)
for (int j = 0; j < GFX_WIDTH; j++){
((Uint32 *)gScreenSurface->pixels)[j+i*gScreenSurface->w] = gfx[(j/10)+(i/10)*64] ? UINT32_MAX : 0;
}
SDL_UnlockSurface(gScreenSurface);
SDL_UpdateWindowSurface(gWindow);
SDL_Delay((1.0/60)*1000);
}