distrib/sdl-1.2.15/test/testsprite.c - platform/external/qemu - Git at Google

 /* Simple program:  Move N sprites around on the screen as fast as possible */

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
 #include <math.h>
 #include <time.h>

 #include "SDL.h"

 #define NUM_SPRITES	100
 #define MAX_SPEED 	1

 SDL_Surface *sprite;
 int numsprites;
 SDL_Rect *sprite_rects;
 SDL_Rect *positions;
 SDL_Rect *velocities;
 int sprites_visible;
 int debug_flip;
 Uint16 sprite_w, sprite_h;

 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
 static void quit(int rc)
 {
 	SDL_Quit();
 	exit(rc);
 }

 int LoadSprite(char *file)
 {
 	SDL_Surface *temp;

 	/* Load the sprite image */
 	sprite = SDL_LoadBMP(file);
 	if ( sprite == NULL ) {
 		fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError());
 		return(-1);
 	}

 	/* Set transparent pixel as the pixel at (0,0) */
 	if ( sprite->format->palette ) {
 		SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY|SDL_RLEACCEL),
 						*(Uint8 *)sprite->pixels);
 	}

 	/* Convert sprite to video format */
 	temp = SDL_DisplayFormat(sprite);
 	SDL_FreeSurface(sprite);
 	if ( temp == NULL ) {
 		fprintf(stderr, "Couldn't convert background: %s\n",
 							SDL_GetError());
 		return(-1);
 	}
 	sprite = temp;

 	/* We're ready to roll. :) */
 	return(0);
 }

 void MoveSprites(SDL_Surface *screen, Uint32 background)
 {
 	int i, nupdates;
 	SDL_Rect area, *position, *velocity;

 	nupdates = 0;
 	/* Erase all the sprites if necessary */
 	if ( sprites_visible ) {
 		SDL_FillRect(screen, NULL, background);
 	}

 	/* Move the sprite, bounce at the wall, and draw */
 	for ( i=0; i<numsprites; ++i ) {
 		position = &positions[i];
 		velocity = &velocities[i];
 		position->x += velocity->x;
 		if ( (position->x < 0) || (position->x >= (screen->w - sprite_w)) ) {
 			velocity->x = -velocity->x;
 			position->x += velocity->x;
 		}
 		position->y += velocity->y;
 		if ( (position->y < 0) || (position->y >= (screen->h - sprite_w)) ) {
 			velocity->y = -velocity->y;
 			position->y += velocity->y;
 		}

 		/* Blit the sprite onto the screen */
 		area = *position;
 		SDL_BlitSurface(sprite, NULL, screen, &area);
 		sprite_rects[nupdates++] = area;
 	}

 	if (debug_flip) {
 		if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
 			static int t = 0;

 			Uint32 color = SDL_MapRGB (screen->format, 255, 0, 0);
 			SDL_Rect r;
 			r.x = (sin((float)t * 2 * 3.1459) + 1.0) / 2.0 * (screen->w-20);
 			r.y = 0;
 			r.w = 20;
 			r.h = screen->h;

 			SDL_FillRect (screen, &r, color);
 			t+=2;
 		}
 	}

 	/* Update the screen! */
 	if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
 		SDL_Flip(screen);
 	} else {
 		SDL_UpdateRects(screen, nupdates, sprite_rects);
 	}
 	sprites_visible = 1;
 }

 /* This is a way of telling whether or not to use hardware surfaces */
 Uint32 FastestFlags(Uint32 flags, int width, int height, int bpp)
 {
 	const SDL_VideoInfo *info;

 	/* Hardware acceleration is only used in fullscreen mode */
 	flags |= SDL_FULLSCREEN;

 	/* Check for various video capabilities */
 	info = SDL_GetVideoInfo();
 	if ( info->blit_hw_CC && info->blit_fill ) {
 		/* We use accelerated colorkeying and color filling */
 		flags |= SDL_HWSURFACE;
 	}
 	/* If we have enough video memory, and will use accelerated
 	   blits directly to it, then use page flipping.
 	 */
 	if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
 		/* Direct hardware blitting without double-buffering
 		   causes really bad flickering.
 		 */
 		if ( info->video_mem*1024 > (height*width*bpp/8) ) {
 			flags |= SDL_DOUBLEBUF;
 		} else {
 			flags &= ~SDL_HWSURFACE;
 		}
 	}

 	/* Return the flags */
 	return(flags);
 }

 int main(int argc, char *argv[])
 {
 	SDL_Surface *screen;
 	Uint8 *mem;
 	int width, height;
 	Uint8  video_bpp;
 	Uint32 videoflags;
 	Uint32 background;
 	int    i, done;
 	SDL_Event event;
 	Uint32 then, now, frames;

 	/* Initialize SDL */
 	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
 		fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
 		return(1);
 	}

 	numsprites = NUM_SPRITES;
 	videoflags = SDL_SWSURFACE|SDL_ANYFORMAT;
 	width = 640;
 	height = 480;
 	video_bpp = 8;
 	debug_flip = 0;
 	while ( argc > 1 ) {
 		--argc;
 		if ( strcmp(argv[argc-1], "-width") == 0 ) {
 			width = atoi(argv[argc]);
 			--argc;
 		} else
 		if ( strcmp(argv[argc-1], "-height") == 0 ) {
 			height = atoi(argv[argc]);
 			--argc;
 		} else
 		if ( strcmp(argv[argc-1], "-bpp") == 0 ) {
 			video_bpp = atoi(argv[argc]);
 			videoflags &= ~SDL_ANYFORMAT;
 			--argc;
 		} else
 		if ( strcmp(argv[argc], "-fast") == 0 ) {
 			videoflags = FastestFlags(videoflags, width, height, video_bpp);
 		} else
 		if ( strcmp(argv[argc], "-hw") == 0 ) {
 			videoflags ^= SDL_HWSURFACE;
 		} else
 		if ( strcmp(argv[argc], "-flip") == 0 ) {
 			videoflags ^= SDL_DOUBLEBUF;
 		} else
 		if ( strcmp(argv[argc], "-debugflip") == 0 ) {
 			debug_flip ^= 1;
 		} else
 		if ( strcmp(argv[argc], "-fullscreen") == 0 ) {
 			videoflags ^= SDL_FULLSCREEN;
 		} else
 		if ( isdigit(argv[argc][0]) ) {
 			numsprites = atoi(argv[argc]);
 		} else {
 			fprintf(stderr,
 	"Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n",
 								argv[0]);
 			quit(1);
 		}
 	}

 	/* Set video mode */
 	screen = SDL_SetVideoMode(width, height, video_bpp, videoflags);
 	if ( ! screen ) {
 		fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
 					width, height, SDL_GetError());
 		quit(2);
 	}

 	/* Load the sprite */
 	if ( LoadSprite("icon.bmp") < 0 ) {
 		quit(1);
 	}

 	/* Allocate memory for the sprite info */
 	mem = (Uint8 *)malloc(4*sizeof(SDL_Rect)*numsprites);
 	if ( mem == NULL ) {
 		SDL_FreeSurface(sprite);
 		fprintf(stderr, "Out of memory!\n");
 		quit(2);
 	}
 	sprite_rects = (SDL_Rect *)mem;
 	positions = sprite_rects;
 	sprite_rects += numsprites;
 	velocities = sprite_rects;
 	sprite_rects += numsprites;
 	sprite_w = sprite->w;
 	sprite_h = sprite->h;
 	srand(time(NULL));
 	for ( i=0; i<numsprites; ++i ) {
 		positions[i].x = rand()%(screen->w - sprite_w);
 		positions[i].y = rand()%(screen->h - sprite_h);
 		positions[i].w = sprite->w;
 		positions[i].h = sprite->h;
 		velocities[i].x = 0;
 		velocities[i].y = 0;
 		while ( ! velocities[i].x && ! velocities[i].y ) {
 			velocities[i].x = (rand()%(MAX_SPEED*2+1))-MAX_SPEED;
 			velocities[i].y = (rand()%(MAX_SPEED*2+1))-MAX_SPEED;
 		}
 	}
 	background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);

 	/* Print out information about our surfaces */
 	printf("Screen is at %d bits per pixel\n",screen->format->BitsPerPixel);
 	if ( (screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
 		printf("Screen is in video memory\n");
 	} else {
 		printf("Screen is in system memory\n");
 	}
 	if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
 		printf("Screen has double-buffering enabled\n");
 	}
 	if ( (sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
 		printf("Sprite is in video memory\n");
 	} else {
 		printf("Sprite is in system memory\n");
 	}
 	/* Run a sample blit to trigger blit acceleration */
 	{ SDL_Rect dst;
 		dst.x = 0;
 		dst.y = 0;
 		dst.w = sprite->w;
 		dst.h = sprite->h;
 		SDL_BlitSurface(sprite, NULL, screen, &dst);
 		SDL_FillRect(screen, &dst, background);
 	}
 	if ( (sprite->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
 		printf("Sprite blit uses hardware acceleration\n");
 	}
 	if ( (sprite->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
 		printf("Sprite blit uses RLE acceleration\n");
 	}

 	/* Loop, blitting sprites and waiting for a keystroke */
 	frames = 0;
 	then = SDL_GetTicks();
 	done = 0;
 	sprites_visible = 0;
 	while ( !done ) {
 		/* Check for events */
 		++frames;
 		while ( SDL_PollEvent(&event) ) {
 			switch (event.type) {
 				case SDL_MOUSEBUTTONDOWN:
 					SDL_WarpMouse(screen->w/2, screen->h/2);
 					break;
 				case SDL_KEYDOWN:
 					/* Any keypress quits the app... */
 				case SDL_QUIT:
 					done = 1;
 					break;
 				default:
 					break;
 			}
 		}
 		MoveSprites(screen, background);
 	}
 	SDL_FreeSurface(sprite);
 	free(mem);

 	/* Print out some timing information */
 	now = SDL_GetTicks();
 	if ( now > then ) {
 		printf("%2.2f frames per second\n",
 					((double)frames*1000)/(now-then));
 	}
 	SDL_Quit();
 	return(0);
 }
	/* Simple program: Move N sprites around on the screen as fast as possible */

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <ctype.h>
	#include <math.h>
	#include <time.h>

	#include "SDL.h"

	#define NUM_SPRITES 100
	#define MAX_SPEED 1

	SDL_Surface *sprite;
	int numsprites;
	SDL_Rect *sprite_rects;
	SDL_Rect *positions;
	SDL_Rect *velocities;
	int sprites_visible;
	int debug_flip;
	Uint16 sprite_w, sprite_h;

	/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
	static void quit(int rc)
	{
	SDL_Quit();
	exit(rc);
	}

	int LoadSprite(char *file)
	{
	SDL_Surface *temp;

	/* Load the sprite image */
	sprite = SDL_LoadBMP(file);
	if ( sprite == NULL ) {
	fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError());
	return(-1);
	}

	/* Set transparent pixel as the pixel at (0,0) */
	if ( sprite->format->palette ) {
	SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY\|SDL_RLEACCEL),
	(Uint8 )sprite->pixels);
	}

	/* Convert sprite to video format */
	temp = SDL_DisplayFormat(sprite);
	SDL_FreeSurface(sprite);
	if ( temp == NULL ) {
	fprintf(stderr, "Couldn't convert background: %s\n",
	SDL_GetError());
	return(-1);
	}
	sprite = temp;

	/* We're ready to roll. :) */
	return(0);
	}

	void MoveSprites(SDL_Surface *screen, Uint32 background)
	{
	int i, nupdates;
	SDL_Rect area, position, velocity;

	nupdates = 0;
	/* Erase all the sprites if necessary */
	if ( sprites_visible ) {
	SDL_FillRect(screen, NULL, background);
	}

	/* Move the sprite, bounce at the wall, and draw */
	for ( i=0; i<numsprites; ++i ) {
	position = &positions[i];
	velocity = &velocities[i];
	position->x += velocity->x;
	if ( (position->x < 0) \|\| (position->x >= (screen->w - sprite_w)) ) {
	velocity->x = -velocity->x;
	position->x += velocity->x;
	}
	position->y += velocity->y;
	if ( (position->y < 0) \|\| (position->y >= (screen->h - sprite_w)) ) {
	velocity->y = -velocity->y;
	position->y += velocity->y;
	}

	/* Blit the sprite onto the screen */
	area = *position;
	SDL_BlitSurface(sprite, NULL, screen, &area);
	sprite_rects[nupdates++] = area;
	}

	if (debug_flip) {
	if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
	static int t = 0;

	Uint32 color = SDL_MapRGB (screen->format, 255, 0, 0);
	SDL_Rect r;
	r.x = (sin((float)t * 2 * 3.1459) + 1.0) / 2.0 * (screen->w-20);
	r.y = 0;
	r.w = 20;
	r.h = screen->h;

	SDL_FillRect (screen, &r, color);
	t+=2;
	}
	}

	/* Update the screen! */
	if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
	SDL_Flip(screen);
	} else {
	SDL_UpdateRects(screen, nupdates, sprite_rects);
	}
	sprites_visible = 1;
	}

	/* This is a way of telling whether or not to use hardware surfaces */
	Uint32 FastestFlags(Uint32 flags, int width, int height, int bpp)
	{
	const SDL_VideoInfo *info;

	/* Hardware acceleration is only used in fullscreen mode */
	flags \|= SDL_FULLSCREEN;

	/* Check for various video capabilities */
	info = SDL_GetVideoInfo();
	if ( info->blit_hw_CC && info->blit_fill ) {
	/* We use accelerated colorkeying and color filling */
	flags \|= SDL_HWSURFACE;
	}
	/* If we have enough video memory, and will use accelerated
	blits directly to it, then use page flipping.
	*/
	if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
	/* Direct hardware blitting without double-buffering
	causes really bad flickering.
	*/
	if ( info->video_mem1024 > (heightwidth*bpp/8) ) {
	flags \|= SDL_DOUBLEBUF;
	} else {
	flags &= ~SDL_HWSURFACE;
	}
	}

	/* Return the flags */
	return(flags);
	}

	int main(int argc, char *argv[])
	{
	SDL_Surface *screen;
	Uint8 *mem;
	int width, height;
	Uint8 video_bpp;
	Uint32 videoflags;
	Uint32 background;
	int i, done;
	SDL_Event event;
	Uint32 then, now, frames;

	/* Initialize SDL */
	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
	fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
	return(1);
	}

	numsprites = NUM_SPRITES;
	videoflags = SDL_SWSURFACE\|SDL_ANYFORMAT;
	width = 640;
	height = 480;
	video_bpp = 8;
	debug_flip = 0;
	while ( argc > 1 ) {
	--argc;
	if ( strcmp(argv[argc-1], "-width") == 0 ) {
	width = atoi(argv[argc]);
	--argc;
	} else
	if ( strcmp(argv[argc-1], "-height") == 0 ) {
	height = atoi(argv[argc]);
	--argc;
	} else
	if ( strcmp(argv[argc-1], "-bpp") == 0 ) {
	video_bpp = atoi(argv[argc]);
	videoflags &= ~SDL_ANYFORMAT;
	--argc;
	} else
	if ( strcmp(argv[argc], "-fast") == 0 ) {
	videoflags = FastestFlags(videoflags, width, height, video_bpp);
	} else
	if ( strcmp(argv[argc], "-hw") == 0 ) {
	videoflags ^= SDL_HWSURFACE;
	} else
	if ( strcmp(argv[argc], "-flip") == 0 ) {
	videoflags ^= SDL_DOUBLEBUF;
	} else
	if ( strcmp(argv[argc], "-debugflip") == 0 ) {
	debug_flip ^= 1;
	} else
	if ( strcmp(argv[argc], "-fullscreen") == 0 ) {
	videoflags ^= SDL_FULLSCREEN;
	} else
	if ( isdigit(argv[argc][0]) ) {
	numsprites = atoi(argv[argc]);
	} else {
	fprintf(stderr,
	"Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n",
	argv[0]);
	quit(1);
	}
	}

	/* Set video mode */
	screen = SDL_SetVideoMode(width, height, video_bpp, videoflags);
	if ( ! screen ) {
	fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
	width, height, SDL_GetError());
	quit(2);
	}

	/* Load the sprite */
	if ( LoadSprite("icon.bmp") < 0 ) {
	quit(1);
	}

	/* Allocate memory for the sprite info */
	mem = (Uint8 )malloc(4sizeof(SDL_Rect)*numsprites);
	if ( mem == NULL ) {
	SDL_FreeSurface(sprite);
	fprintf(stderr, "Out of memory!\n");
	quit(2);
	}
	sprite_rects = (SDL_Rect *)mem;
	positions = sprite_rects;
	sprite_rects += numsprites;
	velocities = sprite_rects;
	sprite_rects += numsprites;
	sprite_w = sprite->w;
	sprite_h = sprite->h;
	srand(time(NULL));
	for ( i=0; i<numsprites; ++i ) {
	positions[i].x = rand()%(screen->w - sprite_w);
	positions[i].y = rand()%(screen->h - sprite_h);
	positions[i].w = sprite->w;
	positions[i].h = sprite->h;
	velocities[i].x = 0;
	velocities[i].y = 0;
	while ( ! velocities[i].x && ! velocities[i].y ) {
	velocities[i].x = (rand()%(MAX_SPEED*2+1))-MAX_SPEED;
	velocities[i].y = (rand()%(MAX_SPEED*2+1))-MAX_SPEED;
	}
	}
	background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);

	/* Print out information about our surfaces */
	printf("Screen is at %d bits per pixel\n",screen->format->BitsPerPixel);
	if ( (screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
	printf("Screen is in video memory\n");
	} else {
	printf("Screen is in system memory\n");
	}
	if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
	printf("Screen has double-buffering enabled\n");
	}
	if ( (sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
	printf("Sprite is in video memory\n");
	} else {
	printf("Sprite is in system memory\n");
	}
	/* Run a sample blit to trigger blit acceleration */
	{ SDL_Rect dst;
	dst.x = 0;
	dst.y = 0;
	dst.w = sprite->w;
	dst.h = sprite->h;
	SDL_BlitSurface(sprite, NULL, screen, &dst);
	SDL_FillRect(screen, &dst, background);
	}
	if ( (sprite->flags & SDL_HWACCEL) == SDL_HWACCEL ) {
	printf("Sprite blit uses hardware acceleration\n");
	}
	if ( (sprite->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
	printf("Sprite blit uses RLE acceleration\n");
	}

	/* Loop, blitting sprites and waiting for a keystroke */
	frames = 0;
	then = SDL_GetTicks();
	done = 0;
	sprites_visible = 0;
	while ( !done ) {
	/* Check for events */
	++frames;
	while ( SDL_PollEvent(&event) ) {
	switch (event.type) {
	case SDL_MOUSEBUTTONDOWN:
	SDL_WarpMouse(screen->w/2, screen->h/2);
	break;
	case SDL_KEYDOWN:
	/* Any keypress quits the app... */
	case SDL_QUIT:
	done = 1;
	break;
	default:
	break;
	}
	}
	MoveSprites(screen, background);
	}
	SDL_FreeSurface(sprite);
	free(mem);

	/* Print out some timing information */
	now = SDL_GetTicks();
	if ( now > then ) {
	printf("%2.2f frames per second\n",
	((double)frames*1000)/(now-then));
	}
	SDL_Quit();
	return(0);
	}