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| #include <SDL2/SDL.h>
#include <SDL2/SDL2_gfxPrimitives.h>
#include <SDL2_gfxutils.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <time.h>
bool loop ;
#define set_loop(x) loop=x ;
#define WIDTH (int16_t) 800
#define HEIGHT (int16_t) 600
#define CENTER_X (int16_t) 800/2
#define CENTER_Y (int16_t) 600/2
#define ITERATIONS 360/12
int sdl_init(uint32_t flags) ;
SDL_Window* sdl_create_window(const char *title,int screen_x_pos, int screen_y_pos, int width, int height,int flags) ;
SDL_Renderer* sdl_create_renderer(SDL_Window *window,int index,int flags) ;
void get_events(void) ;
void clear(SDL_Renderer *pRenderer,uint8_t bg_red, uint8_t bg_green, uint8_t bg_blue,uint8_t bg_a) ;
void display(SDL_Renderer *pRenderer) ;
void update(SDL_Window *pWindow) ;
void clean_up(SDL_Renderer *pRenderer, SDL_Window *pWindow) ;
// $ gcc -g -Wall main.c -o prg -lm -lSDL2 -lSDL2_gfxutils
int main(void) {
/** SDL2 initialized: */
if (sdl_init(SDL_INIT_VIDEO) != 0 ) {
fprintf(stdout,"SDL initialize failed (%s)\n",SDL_GetError());
return -1;
}
/** Window creation: */
SDL_Window* pWindow = NULL;
pWindow = sdl_create_window("SDL2 2D Creation Template", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 800, 600, SDL_WINDOW_SHOWN) ;
if( pWindow == NULL) {
fprintf(stderr,"Windows creation error: %s\n",SDL_GetError());
return -1 ;
}
/** Renderer creation. */
SDL_Renderer *pRenderer ;
if ((pRenderer = sdl_create_renderer(pWindow,-1,SDL_RENDERER_ACCELERATED)) == NULL) {
fprintf(stderr,"SDL Renderer creating error (%s)\n",SDL_GetError());
return -1;
}
srand(time(NULL)) ;
int c ;
Polygon polygons[80] ;
Pixel center ;
center.x = 800/2 ;
center.y = 600/2 ;
for (c=0 ; c < 80 ; c++) {
int side ;
while ((side = rand() % 32) < 3) {} ;
polygons[c] = generate_corners_rounded_polygon(side, c*2.0, center, 0) ;
set_form_color(&polygons[c], rand() % 256, rand() % 256, rand() % 256, 255) ;
}
set_loop(true) ;
c=0 ;
while (loop) {
clear(pRenderer,0, 0, 0, 255) ;
for (c=0 ; c < 80 ; c++) {
display_polygon(pRenderer, polygons[c]) ;
}
display(pRenderer);
update(pWindow);
get_events() ;
usleep(125000) ;
}
/** Freeing the polygons. **/
for (c=0 ; c < 80 ; c++) {
free(polygons[c].coords.x) ;
free(polygons[c].coords.y) ;./prg
*** Error in `./prg': munmap_chunk(): invalid pointer: 0x000000000331fda0 ***
Abandon (core dumped)
}
clean_up(pRenderer, pWindow) ;
SDL_Quit();
return 0;
}
int sdl_init(uint32_t flags) {
/**
* flags:
* SDL_INIT_TIMER timer subsystem
* SDL_INIT_AUDIO audio subsystem
* SDL_INIT_VIDEO video subsystem
* SDL_INIT_JOYSTICK joystick subsystem
* SDL_INIT_HAPTIC haptic (force feedback) subsystem
* SDL_INIT_GAMECONTROLLER controller subsystem
* SDL_INIT_EVENTS events subsystem
* SDL_INIT_EVERYTHING all of the above subsystems
* SDL_INIT_NOPARACHUTE don't catch fatal signals
*******************************************************************/
return SDL_Init(flags) ;
}
SDL_Window* sdl_create_window(const char *title,int screen_x_pos, int screen_y_pos, int width, int height,int flags) {
/**
* screen_x_pos && screen_y_pos == SDL_WINDOWPOS_CENTERED or SDL_WINDOWPOS_UNDEFINED ;
*
* flags :
* SDL_WINDOW_FULLSCREEN fullscreen window
* SDL_WINDOW_FULLSCREEN_DESKTOP fullscreen window at the current desktop resolution
* SDL_WINDOW_OPENGL window usable with OpenGL context
* SDL_WINDOW_HIDDEN window is not visible
* SDL_WINDOW_BORDERLESS no window decoration
* SDL_WINDOW_RESIZABLE window can be resized
* SDL_WINDOW_MINIMIZED window is minimized
* SDL_WINDOW_MAXIMIZED window is maximized
* SDL_WINDOW_INPUT_GRABBED window has grabbed input focus
* SDL_WINDOW_ALLOW_HIGHDPI window should be created in high-DPI mode if supported (>= SDL 2.0.1)
**********************************************************************************************************/
return SDL_CreateWindow(title, screen_x_pos, screen_y_pos, width, height, flags) ;
}
SDL_Renderer* sdl_create_renderer(SDL_Window *window,int index,int flags) {
/**
* index : the index of the rendering driver to initialize, or -1 to initialize the first one supporting the requested flags
*
* flags:
* SDL_RENDERER_SOFTWARE the renderer is a software fallback
* SDL_RENDERER_ACCELERATED the renderer uses hardware acceleration
* SDL_RENDERER_PRESENTVSYNC present is synchronized with the refresh rate
* SDL_RENDERER_TARGETTEXTURE the renderer supports rendering to texture
*
* Note that providing no flags gives priority to available SDL_RENDERER_ACCELERATED renderer.
**********************************************************************************************/
return SDL_CreateRenderer(window,(index != -1) ? index : -1 ,(flags == 0) ? SDL_RENDERER_ACCELERATED : flags ) ;
}
void get_events(void) {
SDL_Event event;
while (SDL_PollEvent(&event)) { /** Get user events */
switch(event.type) {
case SDL_QUIT: /** User quit the application. */
set_loop(false) ;
break;
}
}
return ;
}
void clear(SDL_Renderer *pRenderer,uint8_t bg_red, uint8_t bg_green, uint8_t bg_blue,uint8_t bg_a) {
SDL_SetRenderDrawColor(pRenderer, bg_red, bg_green, bg_blue, bg_a) ;
SDL_RenderClear(pRenderer);
}./prg
*** Error in `./prg': munmap_chunk(): invalid pointer: 0x000000000331fda0 ***
Abandon (core dumped)
void display(SDL_Renderer *pRenderer) {
SDL_RenderPresent(pRenderer);
}
void update(SDL_Window *pWindow) {
SDL_UpdateWindowSurface(pWindow);
}
void clean_up(SDL_Renderer *pRenderer, SDL_Window *pWindow) {
SDL_DestroyRenderer(pRenderer);
SDL_DestroyWindow(pWindow);
} |
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