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/*
* Copyright (c) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
* GPL v2
*/
#include <stdio.h>
#include <SDL.h>
#include <time.h>
#include <signal.h>
#include <mach/linux.h>
#include <unistd.h>
#include <pthread.h>
struct fb_bitfield {
uint32_t offset; /* beginning of bitfield */
uint32_t length; /* length of bitfield */
uint32_t msb_right; /* != 0 : Most significant bit is */
/* right */
};
static SDL_Surface *real_screen;
static void *buffer = NULL;
pthread_t th;
static void sdl_copy_buffer(SDL_Surface *screen)
{
if (SDL_MUSTLOCK(screen)) {
if (SDL_LockSurface(screen) < 0)
return;
}
memcpy(screen->pixels, buffer, screen->pitch * screen->h);
if(SDL_MUSTLOCK(screen))
SDL_UnlockSurface(screen);
}
static void *threadStart(void *ptr)
{
while (1) {
usleep(1000 * 100);
sdl_copy_buffer(real_screen);
SDL_Flip(real_screen);
}
return 0;
}
void sdl_start_timer(void)
{
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_create(&th, &attr, threadStart, NULL);
}
void sdl_stop_timer(void)
{
pthread_cancel(th);
}
void sdl_get_bitfield_rgba(struct fb_bitfield *r, struct fb_bitfield *g,
struct fb_bitfield *b, struct fb_bitfield *a)
{
SDL_Surface *screen = real_screen;
r->length = 8 - screen->format->Rloss;
r->offset = screen->format->Rshift;
g->length = 8 - screen->format->Gloss;
g->offset = screen->format->Gshift;
b->length = 8 - screen->format->Bloss;
b->offset = screen->format->Bshift;
a->length = 8 - screen->format->Aloss;
a->offset = screen->format->Ashift;
}
int sdl_open(int xres, int yres, int bpp, void* buf)
{
int flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE) < 0) {
printf("Could not initialize SDL: %s.\n", SDL_GetError());
return -1;
}
real_screen = SDL_SetVideoMode(xres, yres, bpp, flags);
if (!real_screen) {
sdl_close();
fprintf(stderr, "Couldn't create renderer: %s\n", SDL_GetError());
return -1;
}
buffer = buf;
return 0;
}
void sdl_close(void)
{
sdl_stop_timer();
SDL_Quit();
}
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