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/* Bring up a window and play with it */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define BENCHMARK_SDL
#define NOTICE(X) printf("%s", X);
#include "SDL.h"
/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void quit(int rc)
{
SDL_Quit();
exit(rc);
}
void DrawPict(SDL_Surface *screen, char *bmpfile,
int speedy, int flip, int nofade)
{
SDL_Surface *picture;
SDL_Rect dest, update;
int i, centered;
int ncolors;
SDL_Color *colors, *cmap;
/* Load the image into a surface */
if ( bmpfile == NULL ) {
bmpfile = "app/native/sample.bmp"; /* Sample image */
}
fprintf(stderr, "Loading picture: %s\n", bmpfile);
picture = SDL_LoadBMP(bmpfile);
if ( picture == NULL ) {
fprintf(stderr, "Couldn't load %s: %s\n", bmpfile,
SDL_GetError());
return;
}
/* Set the display colors -- on a hicolor display this is a no-op */
if ( picture->format->palette ) {
ncolors = picture->format->palette->ncolors;
colors = (SDL_Color *)malloc(ncolors*sizeof(SDL_Color));
cmap = (SDL_Color *)malloc(ncolors*sizeof(SDL_Color));
memcpy(colors, picture->format->palette->colors,
ncolors*sizeof(SDL_Color));
} else {
int r, g, b;
/* Allocate 256 color palette */
ncolors = 256;
colors = (SDL_Color *)malloc(ncolors*sizeof(SDL_Color));
cmap = (SDL_Color *)malloc(ncolors*sizeof(SDL_Color));
/* Set a 3,3,2 color cube */
for ( r=0; r<8; ++r ) {
for ( g=0; g<8; ++g ) {
for ( b=0; b<4; ++b ) {
i = ((r<<5)|(g<<2)|b);
colors[i].r = r<<5;
colors[i].g = g<<5;
colors[i].b = b<<6;
}
}
}
}
NOTICE("testwin: setting colors\n");
if ( ! SDL_SetColors(screen, colors, 0, ncolors) &&
(screen->format->palette != NULL) ) {
fprintf(stderr,
"Warning: Couldn't set all of the colors, but SDL will map the image\n"
" (colormap fading will suffer - try the -warp option)\n"
);
}
/* Set the screen to black (not really necessary) */
if ( SDL_LockSurface(screen) == 0 ) {
Uint32 black;
Uint8 *pixels;
black = SDL_MapRGB(screen->format, 0, 0, 0);
pixels = (Uint8 *)screen->pixels;
for ( i=0; i<screen->h; ++i ) {
memset(pixels, black,
screen->w*screen->format->BytesPerPixel);
pixels += screen->pitch;
}
SDL_UnlockSurface(screen);
SDL_UpdateRect(screen, 0, 0, 0, 0);
}
/* Display the picture */
if ( speedy ) {
SDL_Surface *displayfmt;
fprintf(stderr, "Converting picture\n");
displayfmt = SDL_DisplayFormat(picture);
if ( displayfmt == NULL ) {
fprintf(stderr,
"Couldn't convert image: %s\n", SDL_GetError());
goto done;
}
SDL_FreeSurface(picture);
picture = displayfmt;
}
printf("(image surface located in %s memory)\n",
(picture->flags&SDL_HWSURFACE) ? "video" : "system");
centered = (screen->w - picture->w)/2;
if ( centered < 0 ) {
centered = 0;
}
dest.y = (screen->h - picture->h)/2;
dest.w = picture->w;
dest.h = picture->h;
NOTICE("testwin: moving image\n");
for ( i=0; i<=centered; ++i ) {
dest.x = i;
update = dest;
if ( SDL_BlitSurface(picture, NULL, screen, &update) < 0 ) {
fprintf(stderr, "Blit failed: %s\n", SDL_GetError());
break;
}
if ( flip ) {
SDL_Flip(screen);
} else {
SDL_UpdateRects(screen, 1, &update);
}
}
#ifdef SCREENSHOT
if ( SDL_SaveBMP(screen, "screen.bmp") < 0 )
printf("Couldn't save screen: %s\n", SDL_GetError());
#endif
#ifndef BENCHMARK_SDL
/* Let it sit there for a while */
SDL_Delay(5*1000);
#endif
/* Fade the colormap */
if ( ! nofade ) {
int maxstep;
SDL_Color final;
SDL_Color palcolors[256];
struct {
Sint16 r, g, b;
} cdist[256];
NOTICE("testwin: fading out...\n");
memcpy(cmap, colors, ncolors*sizeof(SDL_Color));
maxstep = 32-1;
final.r = 0xFF;
final.g = 0x00;
final.b = 0x00;
memcpy(palcolors, colors, ncolors*sizeof(SDL_Color));
for ( i=0; i<ncolors; ++i ) {
cdist[i].r = final.r-palcolors[i].r;
cdist[i].g = final.g-palcolors[i].g;
cdist[i].b = final.b-palcolors[i].b;
}
for ( i=0; i<=maxstep/2; ++i ) { /* halfway fade */
int c;
for ( c=0; c<ncolors; ++c ) {
colors[c].r =
palcolors[c].r+((cdist[c].r*i))/maxstep;
colors[c].g =
palcolors[c].g+((cdist[c].g*i))/maxstep;
colors[c].b =
palcolors[c].b+((cdist[c].b*i))/maxstep;
}
SDL_SetColors(screen, colors, 0, ncolors);
SDL_Delay(1);
}
final.r = 0x00;
final.g = 0x00;
final.b = 0x00;
memcpy(palcolors, colors, ncolors*sizeof(SDL_Color));
for ( i=0; i<ncolors; ++i ) {
cdist[i].r = final.r-palcolors[i].r;
cdist[i].g = final.g-palcolors[i].g;
cdist[i].b = final.b-palcolors[i].b;
}
maxstep /= 2;
for ( i=0; i<=maxstep; ++i ) { /* finish fade out */
int c;
for ( c=0; c<ncolors; ++c ) {
colors[c].r =
palcolors[c].r+((cdist[c].r*i))/maxstep;
colors[c].g =
palcolors[c].g+((cdist[c].g*i))/maxstep;
colors[c].b =
palcolors[c].b+((cdist[c].b*i))/maxstep;
}
SDL_SetColors(screen, colors, 0, ncolors);
SDL_Delay(1);
}
for ( i=0; i<ncolors; ++i ) {
colors[i].r = final.r;
colors[i].g = final.g;
colors[i].b = final.b;
}
SDL_SetColors(screen, colors, 0, ncolors);
NOTICE("testwin: fading in...\n");
memcpy(palcolors, colors, ncolors*sizeof(SDL_Color));
for ( i=0; i<ncolors; ++i ) {
cdist[i].r = cmap[i].r-palcolors[i].r;
cdist[i].g = cmap[i].g-palcolors[i].g;
cdist[i].b = cmap[i].b-palcolors[i].b;
}
for ( i=0; i<=maxstep; ++i ) { /* 32 step fade in */
int c;
for ( c=0; c<ncolors; ++c ) {
colors[c].r =
palcolors[c].r+((cdist[c].r*i))/maxstep;
colors[c].g =
palcolors[c].g+((cdist[c].g*i))/maxstep;
colors[c].b =
palcolors[c].b+((cdist[c].b*i))/maxstep;
}
SDL_SetColors(screen, colors, 0, ncolors);
SDL_Delay(1);
}
NOTICE("testwin: fading over\n");
}
done:
/* Free the picture and return */
SDL_FreeSurface(picture);
free(colors); free(cmap);
return;
}
int main(int argc, char *argv[])
{
SDL_Surface *screen;
/* Options */
int speedy, flip, nofade;
int delay;
int w, h;
int desired_bpp;
Uint32 video_flags;
#ifdef BENCHMARK_SDL
Uint32 then, now;
#endif
/* Set default options and check command-line */
speedy = 0;
flip = 0;
nofade = 0;
delay = 1;
#ifdef _WIN32_WCE
w = 240;
h = 320;
desired_bpp = 8;
video_flags = SDL_FULLSCREEN;
#else
w = 640;
h = 480;
desired_bpp = 0;
video_flags = 0;
#endif
if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
fprintf(stderr,
"Couldn't initialize SDL: %s\n", SDL_GetError());
return(1);
}
while ( argc > 1 ) {
if ( strcmp(argv[1], "-speedy") == 0 ) {
speedy = 1;
argv += 1;
argc -= 1;
} else
if ( strcmp(argv[1], "-nofade") == 0 ) {
nofade = 1;
argv += 1;
argc -= 1;
} else
if ( strcmp(argv[1], "-delay") == 0 ) {
if ( argv[2] ) {
delay = atoi(argv[2]);
argv += 2;
argc -= 2;
} else {
fprintf(stderr,
"The -delay option requires an argument\n");
quit(1);
}
} else
if ( strcmp(argv[1], "-width") == 0 ) {
if ( argv[2] && ((w = atoi(argv[2])) > 0) ) {
argv += 2;
argc -= 2;
} else {
fprintf(stderr,
"The -width option requires an argument\n");
quit(1);
}
} else
if ( strcmp(argv[1], "-height") == 0 ) {
if ( argv[2] && ((h = atoi(argv[2])) > 0) ) {
argv += 2;
argc -= 2;
} else {
fprintf(stderr,
"The -height option requires an argument\n");
quit(1);
}
} else
if ( strcmp(argv[1], "-bpp") == 0 ) {
if ( argv[2] ) {
desired_bpp = atoi(argv[2]);
argv += 2;
argc -= 2;
} else {
fprintf(stderr,
"The -bpp option requires an argument\n");
quit(1);
}
} else
if ( strcmp(argv[1], "-warp") == 0 ) {
video_flags |= SDL_HWPALETTE;
argv += 1;
argc -= 1;
} else
if ( strcmp(argv[1], "-hw") == 0 ) {
video_flags |= SDL_HWSURFACE;
argv += 1;
argc -= 1;
} else
if ( strcmp(argv[1], "-flip") == 0 ) {
video_flags |= SDL_DOUBLEBUF;
argv += 1;
argc -= 1;
} else
if ( strcmp(argv[1], "-fullscreen") == 0 ) {
video_flags |= SDL_FULLSCREEN;
argv += 1;
argc -= 1;
} else
break;
}
/* Initialize the display */
screen = SDL_SetVideoMode(w, h, desired_bpp, video_flags);
if ( screen == NULL ) {
fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
w, h, desired_bpp, SDL_GetError());
quit(1);
}
printf("Set%s %dx%dx%d mode\n",
screen->flags & SDL_FULLSCREEN ? " fullscreen" : "",
screen->w, screen->h, screen->format->BitsPerPixel);
printf("(video surface located in %s memory)\n",
(screen->flags&SDL_HWSURFACE) ? "video" : "system");
if ( screen->flags & SDL_DOUBLEBUF ) {
printf("Double-buffering enabled\n");
flip = 1;
}
/* Set the window manager title bar */
SDL_WM_SetCaption("SDL test window", "testwin");
/* Do all the drawing work */
#ifdef BENCHMARK_SDL
then = SDL_GetTicks();
DrawPict(screen, argv[1], speedy, flip, nofade);
now = SDL_GetTicks();
printf("Time: %d milliseconds\n", now-then);
#else
DrawPict(screen, argv[1], speedy, flip, nofade);
#endif
SDL_Delay(delay*1000);
SDL_Quit();
return(0);
}
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