351 lines
11 KiB
C
351 lines
11 KiB
C
/*
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Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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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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/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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static void
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quit(int rc)
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{
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SDL_Quit();
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exit(rc);
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}
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void
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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, 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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/* 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, "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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{
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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 = palcolors[c].r + ((cdist[c].r * i)) / maxstep;
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colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep;
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colors[c].b = 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 = palcolors[c].r + ((cdist[c].r * i)) / maxstep;
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colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep;
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colors[c].b = 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 = palcolors[c].r + ((cdist[c].r * i)) / maxstep;
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colors[c].g = palcolors[c].g + ((cdist[c].g * i)) / maxstep;
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colors[c].b = 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);
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free(cmap);
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return;
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}
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int
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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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#ifdef _WIN32_WCE
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w = 240;
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h = 320;
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desired_bpp = 8;
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video_flags = SDL_FULLSCREEN;
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#else
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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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#endif
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if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return (1);
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}
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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 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 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, "The -delay option requires an argument\n");
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quit(1);
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}
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} else 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, "The -width option requires an argument\n");
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quit(1);
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}
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} else 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, "The -height option requires an argument\n");
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quit(1);
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}
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} else 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, "The -bpp option requires an argument\n");
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quit(1);
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}
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} else 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 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 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 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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/* 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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quit(1);
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}
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printf("Set%s %dx%dx%d mode\n",
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screen->flags & SDL_FULLSCREEN ? " fullscreen" : "",
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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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SDL_Quit();
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return (0);
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}
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