mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-05 14:48:24 -05:00
196 lines
4.9 KiB
C
Executable File
196 lines
4.9 KiB
C
Executable File
/*
|
|
Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely.
|
|
*/
|
|
/* Simple program: Move N sprites around on the screen as fast as possible */
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
#include <emscripten/emscripten.h>
|
|
#endif
|
|
|
|
#include "SDL.h"
|
|
|
|
#define WINDOW_WIDTH 640
|
|
#define WINDOW_HEIGHT 480
|
|
#define NUM_SPRITES 100
|
|
#define MAX_SPEED 1
|
|
|
|
static SDL_Texture *sprite;
|
|
static SDL_Rect positions[NUM_SPRITES];
|
|
static SDL_Rect velocities[NUM_SPRITES];
|
|
static int sprite_w, sprite_h;
|
|
|
|
SDL_Renderer *renderer;
|
|
int done;
|
|
|
|
/* 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 */
|
|
temp = SDL_LoadBMP(file);
|
|
if (temp == NULL) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s\n", file, SDL_GetError());
|
|
return (-1);
|
|
}
|
|
sprite_w = temp->w;
|
|
sprite_h = temp->h;
|
|
|
|
/* Set transparent pixel as the pixel at (0,0) */
|
|
if (temp->format->palette) {
|
|
SDL_SetColorKey(temp, SDL_TRUE, *(Uint8 *) temp->pixels);
|
|
} else {
|
|
switch (temp->format->BitsPerPixel) {
|
|
case 15:
|
|
SDL_SetColorKey(temp, SDL_TRUE,
|
|
(*(Uint16 *) temp->pixels) & 0x00007FFF);
|
|
break;
|
|
case 16:
|
|
SDL_SetColorKey(temp, SDL_TRUE, *(Uint16 *) temp->pixels);
|
|
break;
|
|
case 24:
|
|
SDL_SetColorKey(temp, SDL_TRUE,
|
|
(*(Uint32 *) temp->pixels) & 0x00FFFFFF);
|
|
break;
|
|
case 32:
|
|
SDL_SetColorKey(temp, SDL_TRUE, *(Uint32 *) temp->pixels);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Create textures from the image */
|
|
sprite = SDL_CreateTextureFromSurface(renderer, temp);
|
|
if (!sprite) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s\n", SDL_GetError());
|
|
SDL_FreeSurface(temp);
|
|
return (-1);
|
|
}
|
|
SDL_FreeSurface(temp);
|
|
|
|
/* We're ready to roll. :) */
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
MoveSprites()
|
|
{
|
|
int i;
|
|
int window_w = WINDOW_WIDTH;
|
|
int window_h = WINDOW_HEIGHT;
|
|
SDL_Rect *position, *velocity;
|
|
|
|
/* Draw a gray background */
|
|
SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
|
|
SDL_RenderClear(renderer);
|
|
|
|
/* Move the sprite, bounce at the wall, and draw */
|
|
for (i = 0; i < NUM_SPRITES; ++i) {
|
|
position = &positions[i];
|
|
velocity = &velocities[i];
|
|
position->x += velocity->x;
|
|
if ((position->x < 0) || (position->x >= (window_w - sprite_w))) {
|
|
velocity->x = -velocity->x;
|
|
position->x += velocity->x;
|
|
}
|
|
position->y += velocity->y;
|
|
if ((position->y < 0) || (position->y >= (window_h - sprite_h))) {
|
|
velocity->y = -velocity->y;
|
|
position->y += velocity->y;
|
|
}
|
|
|
|
/* Blit the sprite onto the screen */
|
|
SDL_RenderCopy(renderer, sprite, NULL, position);
|
|
}
|
|
|
|
/* Update the screen! */
|
|
SDL_RenderPresent(renderer);
|
|
}
|
|
|
|
void loop()
|
|
{
|
|
SDL_Event event;
|
|
|
|
/* Check for events */
|
|
while (SDL_PollEvent(&event)) {
|
|
if (event.type == SDL_QUIT || event.type == SDL_KEYDOWN) {
|
|
done = 1;
|
|
}
|
|
}
|
|
MoveSprites();
|
|
#ifdef __EMSCRIPTEN__
|
|
if (done) {
|
|
emscripten_cancel_main_loop();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
SDL_Window *window;
|
|
int i;
|
|
|
|
|
|
/* Enable standard application logging */
|
|
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
|
|
|
|
if (SDL_CreateWindowAndRenderer(WINDOW_WIDTH, WINDOW_HEIGHT, 0, &window, &renderer) < 0) {
|
|
quit(2);
|
|
}
|
|
|
|
if (LoadSprite("icon.bmp") < 0) {
|
|
quit(2);
|
|
}
|
|
|
|
/* Initialize the sprite positions */
|
|
srand(time(NULL));
|
|
for (i = 0; i < NUM_SPRITES; ++i) {
|
|
positions[i].x = rand() % (WINDOW_WIDTH - sprite_w);
|
|
positions[i].y = rand() % (WINDOW_HEIGHT - 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;
|
|
}
|
|
}
|
|
|
|
/* Main render loop */
|
|
done = 0;
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
emscripten_set_main_loop(loop, 0, 1);
|
|
#else
|
|
while (!done) {
|
|
loop();
|
|
}
|
|
#endif
|
|
quit(0);
|
|
|
|
return 0; /* to prevent compiler warning */
|
|
}
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|