1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/dosemu/dosemu.c	Sun Apr 06 02:43:24 2014 +0300
     1.3 @@ -0,0 +1,463 @@
     1.4 +/* This file implements all calls made to dos-specific code using SDL */
     1.5 +#include <stdlib.h>
     1.6 +#include <assert.h>
     1.7 +#include <SDL/SDL.h>
     1.8 +#ifdef DOSEMU_CAPTURE
     1.9 +#include <imago2.h>
    1.10 +#endif
    1.11 +#include "gfx.h"
    1.12 +#include "mouse.h"
    1.13 +#include "keyb.h"
    1.14 +#include "timer.h"
    1.15 +
    1.16 +static void proc_events(void);
    1.17 +static void capture_frame(unsigned char *frame);
    1.18 +
    1.19 +static void init_sdl()
    1.20 +{
    1.21 +	const SDL_version *ver;
    1.22 +
    1.23 +	if(!SDL_WasInit(SDL_INIT_EVERYTHING)) {
    1.24 +		SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
    1.25 +
    1.26 +		if((ver = SDL_Linked_Version())) {
    1.27 +			printf("SDL %d.%d.%d initialized\n", ver->major, ver->minor, ver->patch);
    1.28 +		}
    1.29 +	}
    1.30 +}
    1.31 +
    1.32 +/* ----- graphics (gfx.c (vbe) implementation) ----- */
    1.33 +static SDL_Surface *fbsurf;
    1.34 +static int scale = 1;
    1.35 +static int frames_to_capture;
    1.36 +
    1.37 +static struct {
    1.38 +	unsigned char r, g, b;
    1.39 +} palette[256];
    1.40 +
    1.41 +
    1.42 +void *set_video_mode(int xsz, int ysz, int bpp)
    1.43 +{
    1.44 +	unsigned int sdl_flags = bpp <= 8 ? SDL_HWPALETTE : 0;
    1.45 +	char *env;
    1.46 +
    1.47 +	if(getenv("DOSEMU_DOUBLESIZE")) {
    1.48 +		scale = 2;
    1.49 +	}
    1.50 +
    1.51 +	if((env = getenv("DOSEMU_SCALE"))) {
    1.52 +		int n = atoi(env);
    1.53 +		if(n > 0) {
    1.54 +			scale = n;
    1.55 +		}
    1.56 +	}
    1.57 +	xsz *= scale;
    1.58 +	ysz *= scale;
    1.59 +
    1.60 +	if(getenv("DOSEMU_FULLSCREEN")) {
    1.61 +		sdl_flags |= SDL_FULLSCREEN;
    1.62 +	}
    1.63 +
    1.64 +	init_sdl();
    1.65 +
    1.66 +	if(!(fbsurf = SDL_SetVideoMode(xsz, ysz, bpp, sdl_flags))) {
    1.67 +		fprintf(stderr, "failed to set video mode\n");
    1.68 +		abort();
    1.69 +	}
    1.70 +	SDL_WM_SetCaption("Rayzor", 0);
    1.71 +	/*SDL_ShowCursor(0);*/
    1.72 +
    1.73 +	return fbsurf->pixels;
    1.74 +}
    1.75 +
    1.76 +int set_text_mode(void)
    1.77 +{
    1.78 +	SDL_ShowCursor(1);
    1.79 +	SDL_EnableKeyRepeat(0, 0);
    1.80 +	SDL_Quit();
    1.81 +	return 0;
    1.82 +}
    1.83 +
    1.84 +int get_color_depth(void)
    1.85 +{
    1.86 +	return fbsurf->format->BitsPerPixel;
    1.87 +}
    1.88 +
    1.89 +static int count_bits(unsigned int x)
    1.90 +{
    1.91 +	int i, count = 0;
    1.92 +	for(i=0; i<32; i++) {
    1.93 +		if(x & 1) {
    1.94 +			count++;
    1.95 +		}
    1.96 +		x >>= 1;
    1.97 +	}
    1.98 +	return count;
    1.99 +}
   1.100 +
   1.101 +int get_color_bits(int *rbits, int *gbits, int *bbits)
   1.102 +{
   1.103 +	*rbits = count_bits(fbsurf->format->Rmask);
   1.104 +	*gbits = count_bits(fbsurf->format->Gmask);
   1.105 +	*bbits = count_bits(fbsurf->format->Bmask);
   1.106 +	return *rbits + *gbits + *bbits;
   1.107 +}
   1.108 +
   1.109 +int get_color_shift(int *rshift, int *gshift, int *bshift)
   1.110 +{
   1.111 +	*rshift = fbsurf->format->Rshift;
   1.112 +	*gshift = fbsurf->format->Gshift;
   1.113 +	*bshift = fbsurf->format->Bshift;
   1.114 +	return 0;
   1.115 +}
   1.116 +
   1.117 +int get_color_mask(unsigned int *rmask, unsigned int *gmask, unsigned int *bmask)
   1.118 +{
   1.119 +	*rmask = fbsurf->format->Rmask;
   1.120 +	*gmask = fbsurf->format->Gmask;
   1.121 +	*bmask = fbsurf->format->Bmask;
   1.122 +	return 0;
   1.123 +}
   1.124 +
   1.125 +
   1.126 +void set_palette(int idx, int r, int g, int b)
   1.127 +{
   1.128 +	SDL_Color col;
   1.129 +	col.r = r;
   1.130 +	col.g = g;
   1.131 +	col.b = b;
   1.132 +
   1.133 +	if(SDL_SetPalette(fbsurf, SDL_LOGPAL | SDL_PHYSPAL, &col, idx, 1) != 1) {
   1.134 +		fprintf(stderr, "set_palette failed to set the required color\n");
   1.135 +	}
   1.136 +
   1.137 +	palette[idx].r = r;
   1.138 +	palette[idx].g = g;
   1.139 +	palette[idx].b = b;
   1.140 +}
   1.141 +
   1.142 +static int copy_frame_called;
   1.143 +
   1.144 +void copy_frame(void *pixels)
   1.145 +{
   1.146 +	unsigned char *frame = (unsigned char*)pixels;
   1.147 +	copy_frame_called = 1;
   1.148 +
   1.149 +	if(SDL_MUSTLOCK(fbsurf)) {
   1.150 +		SDL_LockSurface(fbsurf);
   1.151 +	}
   1.152 +
   1.153 +	if(pixels) {
   1.154 +		if(scale > 1) {
   1.155 +			int i, j, xsz, ysz;
   1.156 +			unsigned char *dest = fbsurf->pixels;
   1.157 +
   1.158 +			xsz = fbsurf->w * scale;
   1.159 +			ysz = fbsurf->h * scale;
   1.160 +
   1.161 +			for(i=0; i<ysz; i++) {
   1.162 +				for(j=0; j<xsz; j++) {
   1.163 +					*dest++ = frame[(i / scale) * fbsurf->w + (j / scale)];
   1.164 +				}
   1.165 +			}
   1.166 +		} else {
   1.167 +			int num_pixels = fbsurf->w * fbsurf->h;
   1.168 +			memcpy(fbsurf->pixels, frame, num_pixels * fbsurf->format->BytesPerPixel);
   1.169 +		}
   1.170 +	}
   1.171 +
   1.172 +	if(SDL_MUSTLOCK(fbsurf)) {
   1.173 +		SDL_UnlockSurface(fbsurf);
   1.174 +	}
   1.175 +
   1.176 +	SDL_Flip(fbsurf);
   1.177 +
   1.178 +	if(frames_to_capture > 0) {
   1.179 +		capture_frame(pixels);
   1.180 +		--frames_to_capture;
   1.181 +	}
   1.182 +
   1.183 +	/* also print fps every second ... */
   1.184 +	{
   1.185 +		static long prev_fps, num_frames;
   1.186 +		long msec, dt;
   1.187 +
   1.188 +		msec = get_msec();
   1.189 +		dt = msec - prev_fps;
   1.190 +		if(dt >= 1000) {
   1.191 +			float fps = (float)num_frames / ((float)dt / 1000.0f);
   1.192 +			printf("framerate: %.1f      \r", fps);
   1.193 +			fflush(stdout);
   1.194 +			num_frames = 0;
   1.195 +			prev_fps = msec;
   1.196 +		} else {
   1.197 +			num_frames++;
   1.198 +		}
   1.199 +	}
   1.200 +}
   1.201 +
   1.202 +#define spin_delay(ms) \
   1.203 +	do { \
   1.204 +		unsigned int end = SDL_GetTicks() + ms; \
   1.205 +		while((prev_msec = SDL_GetTicks()) < end); \
   1.206 +	} while(0)
   1.207 +
   1.208 +#define FRAME_INTERVAL	(1000/70)
   1.209 +
   1.210 +void wait_vsync(void)
   1.211 +{
   1.212 +	static int prev_msec;
   1.213 +	int msec, dt, tleft;
   1.214 +
   1.215 +	if(!copy_frame_called) {
   1.216 +		copy_frame(0);
   1.217 +		copy_frame_called = 0;
   1.218 +	}
   1.219 +
   1.220 +	msec = SDL_GetTicks();
   1.221 +
   1.222 +	dt = msec - prev_msec;
   1.223 +
   1.224 +	tleft = FRAME_INTERVAL - dt;
   1.225 +	if(tleft > 0) {
   1.226 +		int coarse = tleft & 0xfffffff8;
   1.227 +		tleft = tleft & 7;
   1.228 +
   1.229 +		if(coarse) {
   1.230 +			SDL_Delay(coarse);
   1.231 +		}
   1.232 +		if(tleft) {
   1.233 +			spin_delay(tleft);
   1.234 +		} else {
   1.235 +			prev_msec = SDL_GetTicks();
   1.236 +		}
   1.237 +	} else {
   1.238 +		prev_msec = msec;
   1.239 +	}
   1.240 +}
   1.241 +
   1.242 +static int cap_count = 0;
   1.243 +void begin_capture(int frames)
   1.244 +{
   1.245 +	frames_to_capture = frames;
   1.246 +}
   1.247 +
   1.248 +void end_capture(void)
   1.249 +{
   1.250 +	cap_count = 0;
   1.251 +	frames_to_capture = 0;
   1.252 +}
   1.253 +
   1.254 +#define NUMPIX	(fbsurf->w * fbsurf->h)
   1.255 +static void capture_frame(unsigned char *frame)
   1.256 +{
   1.257 +#ifdef DOSEMU_CAPTURE
   1.258 +	static unsigned char rgbpix[NUMPIX * 4];
   1.259 +	char fname[32];
   1.260 +	int i;
   1.261 +	unsigned char *src, *dest;
   1.262 +
   1.263 +	sprintf(fname, "frame%04d.png", cap_count++);
   1.264 +
   1.265 +	src = frame;
   1.266 +	dest = rgbpix;
   1.267 +
   1.268 +	for(i=0; i<NUMPIX; i++) {
   1.269 +		unsigned char c = *src++;
   1.270 +		*dest++ = palette[c].r;
   1.271 +		*dest++ = palette[c].g;
   1.272 +		*dest++ = palette[c].b;
   1.273 +		*dest++ = 255;
   1.274 +	}
   1.275 +
   1.276 +	img_save_pixels(fname, rgbpix, fbsurf->w, fbsurf->h, IMG_FMT_RGBA32);
   1.277 +#endif
   1.278 +}
   1.279 +
   1.280 +
   1.281 +/* ----- event handling (conio.h) ----- */
   1.282 +static SDL_Event *keybev;
   1.283 +static int mousex, mousey, bnmask;
   1.284 +
   1.285 +static int keystate[256];
   1.286 +static int num_pressed;
   1.287 +
   1.288 +int kbhit(void)
   1.289 +{
   1.290 +	if(!keybev) {
   1.291 +		proc_events();
   1.292 +	}
   1.293 +	return keybev != 0;
   1.294 +}
   1.295 +
   1.296 +int getch(void)
   1.297 +{
   1.298 +	int res;
   1.299 +
   1.300 +	while(!keybev) {
   1.301 +		SDL_Event ev;
   1.302 +		SDL_WaitEvent(&ev);
   1.303 +		SDL_PushEvent(&ev);
   1.304 +		proc_events();
   1.305 +	}
   1.306 +	res = keybev->key.keysym.sym;
   1.307 +	keybev = 0;
   1.308 +	return res;
   1.309 +}
   1.310 +
   1.311 +/* ----- improved event handling (keyb.h) ---- */
   1.312 +
   1.313 +int kb_init(int bufsz)
   1.314 +{
   1.315 +	init_sdl();
   1.316 +
   1.317 +	return 0;
   1.318 +}
   1.319 +
   1.320 +void kb_shutdown(void)
   1.321 +{
   1.322 +}
   1.323 +
   1.324 +int kb_getkey(void)
   1.325 +{
   1.326 +	int res = -1;
   1.327 +
   1.328 +	proc_events();
   1.329 +	if(keybev) {
   1.330 +		res = keybev->key.keysym.sym;
   1.331 +		keybev = 0;
   1.332 +	}
   1.333 +	return res;
   1.334 +}
   1.335 +
   1.336 +int kb_isdown(int key)
   1.337 +{
   1.338 +	if(key == KB_ANY) {
   1.339 +		return num_pressed;
   1.340 +	}
   1.341 +	return keystate[key];
   1.342 +}
   1.343 +
   1.344 +/* mouse handling (mouse.c implementation) */
   1.345 +static unsigned long last_mouse_hide_time;
   1.346 +
   1.347 +int have_mouse(void)
   1.348 +{
   1.349 +	return 1;
   1.350 +}
   1.351 +
   1.352 +void set_mouse(int x, int y)
   1.353 +{
   1.354 +	SDL_ShowCursor(0);
   1.355 +	last_mouse_hide_time = get_msec();
   1.356 +
   1.357 +	SDL_WarpMouse(x * scale, y * scale);
   1.358 +	mousex = x;
   1.359 +	mousey = y;
   1.360 +}
   1.361 +
   1.362 +int read_mouse(int *xp, int *yp)
   1.363 +{
   1.364 +	if(xp) *xp = mousex;
   1.365 +	if(yp) *yp = mousey;
   1.366 +	return bnmask;
   1.367 +}
   1.368 +
   1.369 +static void proc_events(void)
   1.370 +{
   1.371 +	static SDL_Event ev;
   1.372 +
   1.373 +	if(last_mouse_hide_time > 0 && get_msec() - last_mouse_hide_time > 3000) {
   1.374 +		last_mouse_hide_time = 0;
   1.375 +		SDL_ShowCursor(1);
   1.376 +	}
   1.377 +
   1.378 +	while(SDL_PollEvent(&ev)) {
   1.379 +		switch(ev.type) {
   1.380 +		case SDL_KEYDOWN:
   1.381 +			{
   1.382 +				int key = ev.key.keysym.sym;
   1.383 +
   1.384 +				if(!keybev) {
   1.385 +					keybev = &ev;
   1.386 +				}
   1.387 +
   1.388 +				if(!keystate[key]) {
   1.389 +					keystate[key] = 1;
   1.390 +					num_pressed++;
   1.391 +				}
   1.392 +			}
   1.393 +			break;
   1.394 +
   1.395 +		case SDL_KEYUP:
   1.396 +			{
   1.397 +				int key = ev.key.keysym.sym;
   1.398 +
   1.399 +				if(keystate[key]) {
   1.400 +					keystate[key] = 0;
   1.401 +					if(--num_pressed < 0) {
   1.402 +						num_pressed = 0;
   1.403 +					}
   1.404 +				}
   1.405 +			}
   1.406 +			break;
   1.407 +
   1.408 +		case SDL_MOUSEMOTION:
   1.409 +			mousex = ev.motion.x / scale;
   1.410 +			mousey = ev.motion.y / scale;
   1.411 +			break;
   1.412 +
   1.413 +		case SDL_MOUSEBUTTONDOWN:
   1.414 +		case SDL_MOUSEBUTTONUP:
   1.415 +			{
   1.416 +				int mask = 0;
   1.417 +				switch(ev.button.button) {
   1.418 +				case SDL_BUTTON_LEFT:
   1.419 +					mask = MOUSE_LEFT;
   1.420 +					break;
   1.421 +				case SDL_BUTTON_MIDDLE:
   1.422 +					mask = MOUSE_MIDDLE;
   1.423 +					break;
   1.424 +				case SDL_BUTTON_RIGHT:
   1.425 +					mask = MOUSE_RIGHT;
   1.426 +				default:
   1.427 +					break;
   1.428 +				}
   1.429 +				if(!mask) {
   1.430 +					break;
   1.431 +				}
   1.432 +
   1.433 +				if(ev.button.state == SDL_PRESSED) {
   1.434 +					bnmask |= mask;
   1.435 +				} else {
   1.436 +					bnmask &= ~mask;
   1.437 +				}
   1.438 +			}
   1.439 +			break;
   1.440 +
   1.441 +		default:
   1.442 +			break;
   1.443 +		}
   1.444 +	}
   1.445 +}
   1.446 +
   1.447 +/* ---- timer.c implementation ---- */
   1.448 +static Uint32 start_time;
   1.449 +
   1.450 +void init_timer(int res_hz)
   1.451 +{
   1.452 +	init_sdl();
   1.453 +	reset_timer();
   1.454 +}
   1.455 +
   1.456 +void reset_timer(void)
   1.457 +{
   1.458 +	start_time = SDL_GetTicks();
   1.459 +	printf("resetting timer: %u, %lu\n", start_time, get_msec());
   1.460 +}
   1.461 +
   1.462 +unsigned long get_msec(void)
   1.463 +{
   1.464 +	Uint32 ticks = SDL_GetTicks();
   1.465 +	return (unsigned long)(ticks - start_time);
   1.466 +}