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