This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
testwin.c
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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"
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/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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static void
quit(int rc)
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SDL_Quit();
exit(rc);
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void
DrawPict(SDL_Surface * screen, char *bmpfile,
int speedy, int flip, int nofade)
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SDL_Surface *picture;
SDL_Rect dest, update;
int i, centered;
int ncolors;
SDL_Color *colors, *cmap;
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/* Load the image into a surface */
if (bmpfile == NULL) {
bmpfile = "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;
}
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/* 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;
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/* Allocate 256 color palette */
ncolors = 256;
colors = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));
cmap = (SDL_Color *) malloc(ncolors * sizeof(SDL_Color));
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/* 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");
}
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/* Set the screen to black (not really necessary) */
if (SDL_LockSurface(screen) == 0) {
Uint32 black;
Uint8 *pixels;
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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);
}
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/* 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);
}
}
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#ifdef SCREENSHOT
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if (SDL_SaveBMP(screen, "screen.bmp") < 0)
printf("Couldn't save screen: %s\n", SDL_GetError());
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#endif
#ifndef BENCHMARK_SDL
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/* Let it sit there for a while */
SDL_Delay(5 * 1000);
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#endif
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/* 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");
}
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done:
/* Free the picture and return */
SDL_FreeSurface(picture);
free(colors);
free(cmap);
return;
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}
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int
main(int argc, char *argv[])
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{
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SDL_Surface *screen;
/* Options */
int speedy, flip, nofade;
int delay;
int w, h;
int desired_bpp;
Uint32 video_flags;
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#ifdef BENCHMARK_SDL
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Uint32 then, now;
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#endif
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/* Set default options and check command-line */
speedy = 0;
flip = 0;
nofade = 0;
delay = 1;
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#ifdef _WIN32_WCE
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w = 240;
h = 320;
desired_bpp = 8;
video_flags = SDL_FULLSCREEN;
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w = 640;
h = 480;
desired_bpp = 0;
video_flags = 0;
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if (SDL_Init(SDL_INIT_VIDEO) < 0) {
fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
return (1);
}
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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;
}
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/* 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;
}
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/* Set the window manager title bar */
SDL_WM_SetCaption("SDL test window", "testwin");
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/* Do all the drawing work */
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#ifdef BENCHMARK_SDL
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then = SDL_GetTicks();
DrawPict(screen, argv[1], speedy, flip, nofade);
now = SDL_GetTicks();
printf("Time: %d milliseconds\n", now - then);
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#else
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DrawPict(screen, argv[1], speedy, flip, nofade);
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#endif
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SDL_Delay(delay * 1000);
SDL_Quit();
return (0);
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}