SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401938
This commit is contained in:
Sam Lantinga
parent
91a32b77a2
commit
0f030a1802
686 changed files with 117556 additions and 98661 deletions
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@ -1,10 +1,6 @@
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/* Simple program: Move N sprites around on the screen as fast as possible */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <math.h>
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#include <time.h>
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#include "SDL.h"
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@ -22,302 +18,300 @@ int debug_flip;
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Uint16 sprite_w, sprite_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 quit(int rc)
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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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SDL_Quit();
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exit(rc);
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}
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int LoadSprite(char *file)
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int
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LoadSprite(char *file)
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{
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SDL_Surface *temp;
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SDL_Surface *temp;
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/* Load the sprite image */
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sprite = SDL_LoadBMP(file);
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if ( sprite == NULL ) {
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fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError());
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return(-1);
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}
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/* Load the sprite image */
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sprite = SDL_LoadBMP(file);
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if (sprite == NULL) {
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fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError());
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return (-1);
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}
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/* Set transparent pixel as the pixel at (0,0) */
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if ( sprite->format->palette ) {
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SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY|SDL_RLEACCEL),
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*(Uint8 *)sprite->pixels);
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}
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/* Set transparent pixel as the pixel at (0,0) */
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if (sprite->format->palette) {
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SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY | SDL_RLEACCEL),
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*(Uint8 *) sprite->pixels);
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}
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/* Convert sprite to video format */
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temp = SDL_DisplayFormat(sprite);
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SDL_FreeSurface(sprite);
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if ( temp == NULL ) {
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fprintf(stderr, "Couldn't convert background: %s\n",
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SDL_GetError());
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return(-1);
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}
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sprite = temp;
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/* Convert sprite to video format */
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temp = SDL_DisplayFormat(sprite);
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SDL_FreeSurface(sprite);
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if (temp == NULL) {
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fprintf(stderr, "Couldn't convert background: %s\n", SDL_GetError());
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return (-1);
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}
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sprite = temp;
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/* We're ready to roll. :) */
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return(0);
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/* We're ready to roll. :) */
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return (0);
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}
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void MoveSprites(SDL_Surface *screen, Uint32 background)
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void
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MoveSprites(SDL_Surface * screen, Uint32 background)
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{
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int i, nupdates;
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SDL_Rect area, *position, *velocity;
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int i, nupdates;
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SDL_Rect area, *position, *velocity;
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nupdates = 0;
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/* Erase all the sprites if necessary */
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if ( sprites_visible ) {
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SDL_FillRect(screen, NULL, background);
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}
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nupdates = 0;
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/* Erase all the sprites if necessary */
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if (sprites_visible) {
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SDL_FillRect(screen, NULL, background);
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}
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/* Move the sprite, bounce at the wall, and draw */
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for ( i=0; i<numsprites; ++i ) {
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position = &positions[i];
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velocity = &velocities[i];
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position->x += velocity->x;
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if ( (position->x < 0) || (position->x >= (screen->w - sprite_w)) ) {
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velocity->x = -velocity->x;
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position->x += velocity->x;
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}
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position->y += velocity->y;
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if ( (position->y < 0) || (position->y >= (screen->h - sprite_w)) ) {
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velocity->y = -velocity->y;
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position->y += velocity->y;
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}
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/* Move the sprite, bounce at the wall, and draw */
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for (i = 0; i < numsprites; ++i) {
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position = &positions[i];
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velocity = &velocities[i];
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position->x += velocity->x;
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if ((position->x < 0) || (position->x >= (screen->w - sprite_w))) {
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velocity->x = -velocity->x;
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position->x += velocity->x;
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}
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position->y += velocity->y;
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if ((position->y < 0) || (position->y >= (screen->h - sprite_w))) {
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velocity->y = -velocity->y;
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position->y += velocity->y;
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}
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/* Blit the sprite onto the screen */
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area = *position;
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SDL_BlitSurface(sprite, NULL, screen, &area);
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sprite_rects[nupdates++] = area;
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}
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/* Blit the sprite onto the screen */
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area = *position;
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SDL_BlitSurface(sprite, NULL, screen, &area);
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sprite_rects[nupdates++] = area;
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}
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if (debug_flip) {
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if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
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static int t = 0;
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if (debug_flip) {
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if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {
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static int t = 0;
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Uint32 color = SDL_MapRGB (screen->format, 255, 0, 0);
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SDL_Rect r;
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r.x = (sin((float)t * 2 * 3.1459) + 1.0) / 2.0 * (screen->w-20);
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r.y = 0;
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r.w = 20;
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r.h = screen->h;
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Uint32 color = SDL_MapRGB(screen->format, 255, 0, 0);
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SDL_Rect r;
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r.x =
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(sin((float) t * 2 * 3.1459) + 1.0) / 2.0 * (screen->w - 20);
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r.y = 0;
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r.w = 20;
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r.h = screen->h;
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SDL_FillRect (screen, &r, color);
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t+=2;
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}
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}
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SDL_FillRect(screen, &r, color);
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t += 2;
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}
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}
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/* Update the screen! */
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if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
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SDL_Flip(screen);
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} else {
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SDL_UpdateRects(screen, nupdates, sprite_rects);
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}
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sprites_visible = 1;
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/* Update the screen! */
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if ((screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {
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SDL_Flip(screen);
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} else {
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SDL_UpdateRects(screen, nupdates, sprite_rects);
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}
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sprites_visible = 1;
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}
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/* This is a way of telling whether or not to use hardware surfaces */
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Uint32 FastestFlags(Uint32 flags, int width, int height, int bpp)
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Uint32
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FastestFlags(Uint32 flags, int width, int height, int bpp)
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{
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const SDL_VideoInfo *info;
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const SDL_VideoInfo *info;
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/* Hardware acceleration is only used in fullscreen mode */
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flags |= SDL_FULLSCREEN;
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/* Hardware acceleration is only used in fullscreen mode */
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flags |= SDL_FULLSCREEN;
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/* Check for various video capabilities */
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info = SDL_GetVideoInfo();
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if ( info->blit_hw_CC && info->blit_fill ) {
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/* We use accelerated colorkeying and color filling */
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flags |= SDL_HWSURFACE;
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}
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/* If we have enough video memory, and will use accelerated
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blits directly to it, then use page flipping.
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*/
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if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
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/* Direct hardware blitting without double-buffering
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causes really bad flickering.
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*/
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if ( info->video_mem*1024 > (height*width*bpp/8) ) {
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flags |= SDL_DOUBLEBUF;
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} else {
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flags &= ~SDL_HWSURFACE;
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}
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}
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/* Check for various video capabilities */
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info = SDL_GetVideoInfo();
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if (info->blit_hw_CC && info->blit_fill) {
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/* We use accelerated colorkeying and color filling */
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flags |= SDL_HWSURFACE;
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}
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/* If we have enough video memory, and will use accelerated
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blits directly to it, then use page flipping.
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*/
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if ((flags & SDL_HWSURFACE) == SDL_HWSURFACE) {
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/* Direct hardware blitting without double-buffering
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causes really bad flickering.
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*/
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if (info->video_mem * 1024 > (height * width * bpp / 8)) {
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flags |= SDL_DOUBLEBUF;
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} else {
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flags &= ~SDL_HWSURFACE;
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}
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}
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/* Return the flags */
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return(flags);
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/* Return the flags */
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return (flags);
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}
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int main(int argc, char *argv[])
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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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Uint8 *mem;
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int width, height;
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Uint8 video_bpp;
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Uint32 videoflags;
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Uint32 background;
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int i, done;
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SDL_Event event;
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Uint32 then, now, frames;
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SDL_Surface *screen;
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Uint8 *mem;
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int width, height;
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Uint8 video_bpp;
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Uint32 videoflags;
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Uint32 background;
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int i, done;
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SDL_Event event;
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Uint32 then, now, frames;
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/* Initialize SDL */
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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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/* Initialize SDL */
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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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numsprites = NUM_SPRITES;
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videoflags = SDL_SWSURFACE|SDL_ANYFORMAT;
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width = 640;
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height = 480;
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video_bpp = 8;
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debug_flip = 0;
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while ( argc > 1 ) {
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--argc;
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if ( strcmp(argv[argc-1], "-width") == 0 ) {
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width = atoi(argv[argc]);
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--argc;
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} else
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if ( strcmp(argv[argc-1], "-height") == 0 ) {
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height = atoi(argv[argc]);
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--argc;
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} else
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if ( strcmp(argv[argc-1], "-bpp") == 0 ) {
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video_bpp = atoi(argv[argc]);
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videoflags &= ~SDL_ANYFORMAT;
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--argc;
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} else
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if ( strcmp(argv[argc], "-fast") == 0 ) {
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videoflags = FastestFlags(videoflags, width, height, video_bpp);
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} else
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if ( strcmp(argv[argc], "-hw") == 0 ) {
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videoflags ^= SDL_HWSURFACE;
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} else
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if ( strcmp(argv[argc], "-flip") == 0 ) {
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videoflags ^= SDL_DOUBLEBUF;
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} else
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if ( strcmp(argv[argc], "-debugflip") == 0 ) {
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debug_flip ^= 1;
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} else
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if ( strcmp(argv[argc], "-fullscreen") == 0 ) {
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videoflags ^= SDL_FULLSCREEN;
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} else
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if ( isdigit(argv[argc][0]) ) {
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numsprites = atoi(argv[argc]);
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} else {
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fprintf(stderr,
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"Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n",
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argv[0]);
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quit(1);
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}
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}
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numsprites = NUM_SPRITES;
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videoflags = SDL_SWSURFACE | SDL_ANYFORMAT;
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width = 640;
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height = 480;
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video_bpp = 8;
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debug_flip = 0;
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while (argc > 1) {
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--argc;
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if (strcmp(argv[argc - 1], "-width") == 0) {
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width = atoi(argv[argc]);
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--argc;
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} else if (strcmp(argv[argc - 1], "-height") == 0) {
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height = atoi(argv[argc]);
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--argc;
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} else if (strcmp(argv[argc - 1], "-bpp") == 0) {
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video_bpp = atoi(argv[argc]);
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videoflags &= ~SDL_ANYFORMAT;
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--argc;
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} else if (strcmp(argv[argc], "-fast") == 0) {
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videoflags = FastestFlags(videoflags, width, height, video_bpp);
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} else if (strcmp(argv[argc], "-hw") == 0) {
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videoflags ^= SDL_HWSURFACE;
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} else if (strcmp(argv[argc], "-flip") == 0) {
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videoflags ^= SDL_DOUBLEBUF;
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} else if (strcmp(argv[argc], "-debugflip") == 0) {
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debug_flip ^= 1;
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} else if (strcmp(argv[argc], "-fullscreen") == 0) {
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videoflags ^= SDL_FULLSCREEN;
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} else if (isdigit(argv[argc][0])) {
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numsprites = atoi(argv[argc]);
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} else {
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fprintf(stderr,
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"Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n",
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argv[0]);
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quit(1);
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}
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}
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/* Set video mode */
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screen = SDL_SetVideoMode(width, height, video_bpp, videoflags);
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if ( ! screen ) {
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fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
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width, height, SDL_GetError());
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quit(2);
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}
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/* Set video mode */
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screen = SDL_SetVideoMode(width, height, video_bpp, videoflags);
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if (!screen) {
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fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
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width, height, SDL_GetError());
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quit(2);
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}
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/* Load the sprite */
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if ( LoadSprite("icon.bmp") < 0 ) {
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quit(1);
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}
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/* Load the sprite */
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if (LoadSprite("icon.bmp") < 0) {
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quit(1);
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}
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/* Allocate memory for the sprite info */
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mem = (Uint8 *)malloc(4*sizeof(SDL_Rect)*numsprites);
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if ( mem == NULL ) {
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SDL_FreeSurface(sprite);
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fprintf(stderr, "Out of memory!\n");
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quit(2);
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}
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sprite_rects = (SDL_Rect *)mem;
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positions = sprite_rects;
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sprite_rects += numsprites;
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velocities = sprite_rects;
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sprite_rects += numsprites;
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sprite_w = sprite->w;
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sprite_h = sprite->h;
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srand(time(NULL));
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for ( i=0; i<numsprites; ++i ) {
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positions[i].x = rand()%(screen->w - sprite_w);
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positions[i].y = rand()%(screen->h - sprite_h);
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positions[i].w = sprite->w;
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positions[i].h = sprite->h;
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velocities[i].x = 0;
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velocities[i].y = 0;
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while ( ! velocities[i].x && ! velocities[i].y ) {
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velocities[i].x = (rand()%(MAX_SPEED*2+1))-MAX_SPEED;
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velocities[i].y = (rand()%(MAX_SPEED*2+1))-MAX_SPEED;
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}
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}
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background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
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/* Allocate memory for the sprite info */
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mem = (Uint8 *) malloc(4 * sizeof(SDL_Rect) * numsprites);
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if (mem == NULL) {
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SDL_FreeSurface(sprite);
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fprintf(stderr, "Out of memory!\n");
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quit(2);
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}
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sprite_rects = (SDL_Rect *) mem;
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positions = sprite_rects;
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sprite_rects += numsprites;
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velocities = sprite_rects;
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sprite_rects += numsprites;
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sprite_w = sprite->w;
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sprite_h = sprite->h;
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srand(time(NULL));
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for (i = 0; i < numsprites; ++i) {
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positions[i].x = rand() % (screen->w - sprite_w);
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positions[i].y = rand() % (screen->h - sprite_h);
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positions[i].w = sprite->w;
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positions[i].h = sprite->h;
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velocities[i].x = 0;
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velocities[i].y = 0;
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while (!velocities[i].x && !velocities[i].y) {
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velocities[i].x = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
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velocities[i].y = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
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}
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}
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background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
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/* Print out information about our surfaces */
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printf("Screen is at %d bits per pixel\n",screen->format->BitsPerPixel);
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if ( (screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
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printf("Screen is in video memory\n");
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} else {
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printf("Screen is in system memory\n");
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}
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if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
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printf("Screen has double-buffering enabled\n");
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}
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if ( (sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
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printf("Sprite is in video memory\n");
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} else {
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printf("Sprite is in system memory\n");
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}
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/* 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");
|
||||
}
|
||||
/* 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);
|
||||
/* 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);
|
||||
/* 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);
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue