150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/*
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SDL_anim: an animation library for SDL
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Copyright (C) 2001, 2002 Michael Leonhard
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Michael Leonhard
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mike@tamale.net
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*/
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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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#include <SDL/SDL.h>
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#include "SDL_anim.h"
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/* Draw a Gimpish background pattern to show transparency in the anim */
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void draw_background( SDL_Surface *screen ) {
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Uint8 *dst = screen->pixels;
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int x, y;
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int bpp = screen->format->BytesPerPixel;
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Uint32 col[2];
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col[0] = SDL_MapRGB(screen->format, 0x66, 0x66, 0x66);
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col[1] = SDL_MapRGB(screen->format, 0x99, 0x99, 0x99);
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for(y = 0; y < screen->h; y++) {
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for(x = 0; x < screen->w; x++) {
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/* use an 8x8 checkerboard pattern */
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Uint32 c = col[((x ^ y) >> 3) & 1];
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switch(bpp) {
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case 1:
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dst[x] = c;
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break;
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case 2:
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((Uint16 *)dst)[x] = c;
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break;
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case 3:
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if(SDL_BYTEORDER == SDL_LIL_ENDIAN) {
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dst[x * 3] = c;
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dst[x * 3 + 1] = c >> 8;
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dst[x * 3 + 2] = c >> 16;
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}
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else {
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dst[x * 3] = c >> 16;
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dst[x * 3 + 1] = c >> 8;
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dst[x * 3 + 2] = c;
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}
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break;
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case 4:
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((Uint32 *)dst)[x] = c;
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break;
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}
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}
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dst += screen->pitch;
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}
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}
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int app_main(int argc, char *argv[]) {
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SDL_Surface *screen;
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SDL_Animation *anim;
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SDL_Rect rect;
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SDL_Event event;
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SDL_KeyboardEvent *key;
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int depth, done;
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Uint32 start;
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argv[1]="ship.ani";
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/* Initialize the SDL library */
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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 2;
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}
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/* Open the anim file */
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anim = Anim_Load(argv[1]);
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if( anim == NULL ) {
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fprintf( stderr, "Couldn't load %s: %s\n", argv[1], SDL_GetError() );
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SDL_Quit();
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return 3;
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}
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SDL_WM_SetCaption( argv[1], "showanim" );
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/* Create a display for the anim */
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depth = SDL_VideoModeOK( anim->w + 1, anim->h, 32, SDL_HWPALETTE );
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/* Use the deepest native mode, except that we emulate 32bpp for */
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/* viewing non-indexed anims on 8bpp screens */
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if( (anim->surface->format->BytesPerPixel > 1) && (depth == 8) ) {
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depth = 32;
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}
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screen = SDL_SetVideoMode( anim->w + 10, anim->h, 16, SDL_HWPALETTE );
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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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anim->w, anim->h, depth, SDL_GetError() );
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SDL_Quit();
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return 4;
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}
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/* Set the palette, if one exists */
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if( anim->surface->format->palette ) {
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SDL_SetColors( screen, anim->surface->format->palette->colors,
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0, anim->surface->format->palette->ncolors );
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}
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if( !Anim_DisplayFormat( anim ) ) {
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fprintf( stderr, "Anim_DisplayFormat() failed\n" );
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return 5;
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}
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done = 0;
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start = SDL_GetTicks();
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while( !done ) {
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while( SDL_PollEvent( &event ) ) {
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switch( event.type ) {
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case SDL_QUIT:
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done = 1;
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break;
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case SDL_KEYDOWN:
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key = (SDL_KeyboardEvent *)&event;
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if( key->keysym.sym == SDLK_ESCAPE ) done = 1;
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start = SDL_GetTicks();
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break;
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}
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}
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draw_background( screen );
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rect.x = 0;
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rect.y = 0;
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Anim_BlitFrame( anim, start, SDL_GetTicks(), screen, &rect );
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SDL_UpdateRect( screen, 0, 0, 0, 0 );
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SDL_Delay( 100 );
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}
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Anim_Free( anim );
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SDL_Quit();
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return 0;
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}
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