author | Sam Lantinga <slouken@libsdl.org> |
Sun, 04 Nov 2001 04:18:05 +0000 | |
changeset 228 | 153f221b7d48 |
parent 0 | 74212992fb08 |
child 1151 | be9c9c8f6d53 |
permissions | -rw-r--r-- |
0 | 1 |
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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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228
153f221b7d48
Give more info about the current video mode
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
338 |
printf("Set%s %dx%dx%d mode\n", |
153f221b7d48
Give more info about the current video mode
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
339 |
screen->flags & SDL_FULLSCREEN ? " fullscreen" : "", |
0 | 340 |
screen->w, screen->h, screen->format->BitsPerPixel); |
341 |
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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347 |
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348 |
/* Set the window manager title bar */ |
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SDL_WM_SetCaption("SDL test window", "testwin"); |
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||
351 |
/* Do all the drawing work */ |
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352 |
#ifdef BENCHMARK_SDL |
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353 |
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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} |