1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/fblibsdl.c	Sun Jan 18 03:16:37 2015 +0200
     1.3 @@ -0,0 +1,199 @@
     1.4 +#ifdef FBLIB_SDL
     1.5 +#include <stdio.h>
     1.6 +#include <stdlib.h>
     1.7 +#include <string.h>
     1.8 +#include <SDL/SDL.h>
     1.9 +#include "fblib.h"
    1.10 +#include "fblibimp.h"
    1.11 +
    1.12 +static int scale;
    1.13 +static SDL_Surface *surf;
    1.14 +static unsigned char *scalebuf;	/* only if scale != 1 */
    1.15 +static int pixbytes;	/* pixel size in bytes */
    1.16 +
    1.17 +int fb_init(int width, int height, int bpp)
    1.18 +{
    1.19 +	static int sdlinit_done;
    1.20 +	char *env, title[64];
    1.21 +
    1.22 +	if((env = getenv("FBLIB_SCALE"))) {
    1.23 +		scale = atoi(env);
    1.24 +	}
    1.25 +	if(!scale) scale = 1;
    1.26 +
    1.27 +	fb_width = width;
    1.28 +	fb_height = height;
    1.29 +	fb_bpp = bpp;
    1.30 +
    1.31 +	pixbytes = (bpp + 7) / 8;
    1.32 +
    1.33 +	if(!sdlinit_done) {
    1.34 +		if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) == -1) {
    1.35 +			fprintf(stderr, "failed to initialize SDL!\n");
    1.36 +			return -1;
    1.37 +		}
    1.38 +		sdlinit_done = 1;
    1.39 +	}
    1.40 +
    1.41 +	if(!(surf = SDL_SetVideoMode(width * scale, height * scale, bpp, SDL_SWSURFACE))) {
    1.42 +		fprintf(stderr, "failed to set video mode\n");
    1.43 +		return -1;
    1.44 +	}
    1.45 +	sprintf(title, "fblib window (%dx)", scale);
    1.46 +	SDL_WM_SetCaption(title, 0);
    1.47 +
    1.48 +	if(scale != 1) {
    1.49 +		if(!(scalebuf = malloc(width * height * pixbytes))) {
    1.50 +			fprintf(stderr, "failed to allocate back buffer\n");
    1.51 +			SDL_Quit();
    1.52 +			return -1;
    1.53 +		}
    1.54 +	} else {
    1.55 +		scalebuf = 0;
    1.56 +	}
    1.57 +
    1.58 +	return 0;
    1.59 +}
    1.60 +
    1.61 +void fb_shutdown(void)
    1.62 +{
    1.63 +	free(scalebuf);
    1.64 +	SDL_Quit();
    1.65 +}
    1.66 +
    1.67 +int fb_get_width(void)
    1.68 +{
    1.69 +	return fb_width;
    1.70 +}
    1.71 +
    1.72 +int fb_get_height(void)
    1.73 +{
    1.74 +	return fb_height;
    1.75 +}
    1.76 +
    1.77 +int fb_get_bpp(void)
    1.78 +{
    1.79 +	return fb_bpp;
    1.80 +}
    1.81 +
    1.82 +void *fb_begin_frame(void)
    1.83 +{
    1.84 +	if(!surf) return 0;
    1.85 +
    1.86 +	if(scalebuf) {
    1.87 +		return scalebuf;
    1.88 +	}
    1.89 +
    1.90 +	if(SDL_MUSTLOCK(surf)) {
    1.91 +		SDL_LockSurface(surf);
    1.92 +	}
    1.93 +	return surf->pixels;
    1.94 +}
    1.95 +
    1.96 +void fb_end_frame(void)
    1.97 +{
    1.98 +	if(scalebuf) {
    1.99 +		int i, j, k;
   1.100 +		unsigned char *dest;
   1.101 +
   1.102 +		if(SDL_MUSTLOCK(surf)) {
   1.103 +			SDL_LockSurface(surf);
   1.104 +		}
   1.105 +		dest = surf->pixels;
   1.106 +
   1.107 +		for(i=0; i<surf->h; i++) {
   1.108 +			int y = i / scale;
   1.109 +			unsigned char *scan = scalebuf + y * fb_width * pixbytes;
   1.110 +
   1.111 +			for(j=0; j<surf->w; j++) {
   1.112 +				int x = j / scale;
   1.113 +
   1.114 +				for(k=0; k<pixbytes; k++) {
   1.115 +					*dest++ = scan[x * pixbytes + k];
   1.116 +				}
   1.117 +			}
   1.118 +		}
   1.119 +	}
   1.120 +
   1.121 +	if(SDL_MUSTLOCK(surf)) {
   1.122 +		SDL_UnlockSurface(surf);
   1.123 +	}
   1.124 +
   1.125 +	SDL_Flip(surf);
   1.126 +}
   1.127 +
   1.128 +void fb_set_palette_range(int start, int count, int *colors)
   1.129 +{
   1.130 +	int i, *col = colors;
   1.131 +	SDL_Colour sdlcol[256];
   1.132 +
   1.133 +	for(i=0; i<count; i++) {
   1.134 +		sdlcol[i].r = *col++;
   1.135 +		sdlcol[i].g = *col++;
   1.136 +		sdlcol[i].b = *col++;
   1.137 +	}
   1.138 +
   1.139 +	SDL_SetPalette(surf, SDL_LOGPAL | SDL_PHYSPAL, sdlcol, start, count);
   1.140 +}
   1.141 +
   1.142 +int fb_process_events(void)
   1.143 +{
   1.144 +	SDL_Event ev;
   1.145 +
   1.146 +	while(SDL_PollEvent(&ev)) {
   1.147 +		switch(ev.type) {
   1.148 +		case SDL_QUIT:
   1.149 +			return -1;
   1.150 +
   1.151 +		case SDL_KEYDOWN:
   1.152 +		case SDL_KEYUP:
   1.153 +			{
   1.154 +				int key = ev.key.keysym.sym;
   1.155 +				int state = ev.key.state == SDL_PRESSED;
   1.156 +
   1.157 +				if(key < 256) {
   1.158 +					fb_inp.key[key] = state;
   1.159 +				}
   1.160 +				if(fb_cb.keyb) {
   1.161 +					fb_cb.keyb(key, state, fb_cb.keyb_data);
   1.162 +				} else {
   1.163 +					if(key == SDLK_ESCAPE) {
   1.164 +						return -1;
   1.165 +					}
   1.166 +				}
   1.167 +			}
   1.168 +			break;
   1.169 +
   1.170 +		case SDL_MOUSEBUTTONDOWN:
   1.171 +		case SDL_MOUSEBUTTONUP:
   1.172 +			{
   1.173 +				int state = ev.button.state == SDL_PRESSED;
   1.174 +				fb_inp.mx = ev.motion.x / scale;
   1.175 +				fb_inp.my = ev.motion.y / scale;
   1.176 +				fb_inp.mbutton[ev.button.which] = state;
   1.177 +
   1.178 +				if(fb_cb.button) {
   1.179 +					fb_cb.button(ev.button.which, state, fb_inp.mx, fb_inp.my, fb_cb.button_data);
   1.180 +				}
   1.181 +			}
   1.182 +			break;
   1.183 +
   1.184 +		case SDL_MOUSEMOTION:
   1.185 +			fb_inp.mx = ev.motion.x / scale;
   1.186 +			fb_inp.my = ev.motion.y / scale;
   1.187 +			if(fb_cb.motion) {
   1.188 +				fb_cb.motion(fb_inp.mx, fb_inp.my, fb_cb.motion_data);
   1.189 +			}
   1.190 +			break;
   1.191 +		}
   1.192 +	}
   1.193 +
   1.194 +	return 0;
   1.195 +}
   1.196 +
   1.197 +unsigned long fb_get_time(void)
   1.198 +{
   1.199 +	return SDL_GetTicks();
   1.200 +}
   1.201 +
   1.202 +#endif	/* FBLIB_SDL */