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#include <SDL.h>
#include <SDL_image.h>
#if ! SDL_VERSION_ATLEAST(2,0,0)
#error "This code is only for SDL 2+. No backward compatibility with previous SDL versions, sorry."
#endif
#include "utils.h"
#define MPL_WINDOW_TITLE __FILE__
#define MPL_WINDOW_WIDTH 640
#define MPL_WINDOW_HEIGHT 480
#define MPL_COLOR_KEY 0x00ff00ff
/*
Uint32 SDL_MapRGB(const SDL_PixelFormat* format,
Uint8 r,
Uint8 g,
Uint8 b)
*/
void my_SDL_init_or_die(char title[], SDL_Rect win_pos, Uint32 init_flags, Uint32 win_flags, Uint32 rend_flags, SDL_Window **win, SDL_Renderer **rend, SDL_RendererInfo *rend_info, SDL_Rect *viewport);
SDL_Texture * my_sdl_load_texture(SDL_Renderer *rend, char *bmpfilepath, SDL_Rect *size);
int main(int argc, char *argv[]) {
SDL_Window *sdl_win;
SDL_Renderer *sdl_rend;
SDL_Texture *t1;
SDL_RendererInfo sdl_rend_info;
SDL_Rect sdl_viewport,t1_size,t1_src,t1_dst;
SDL_Event sdl_ev;
int mainloop_end=0;
SDL_Rect win_pos = { .x=SDL_WINDOWPOS_UNDEFINED, .y=SDL_WINDOWPOS_UNDEFINED, .w=MPL_WINDOW_WIDTH, .h=MPL_WINDOW_HEIGHT };
Uint32 init_flags = SDL_INIT_TIMER|SDL_INIT_AUDIO|SDL_INIT_VIDEO;//|SDL_INIT_EVENTS;
Uint32 win_flags = SDL_WINDOW_SHOWN; //|SDL_WINDOW_OPENGL;
//Uint32 rend_flags = SDL_RENDERER_ACCELERATED|SDL_RENDERER_PRESENTVSYNC;
Uint32 rend_flags = SDL_RENDERER_ACCELERATED;
my_SDL_init_or_die(MPL_WINDOW_TITLE, win_pos, init_flags, win_flags, rend_flags, &sdl_win, &sdl_rend, &sdl_rend_info, &sdl_viewport);
t1=my_sdl_load_texture(sdl_rend, "src/sandbox/lemm_15.gif", &t1_size);
t1_src=t1_size;
t1_src.h=26;
t1_dst=t1_src;
t1_dst.x=10;
t1_dst.y=10;
/* Main render loop */
while (!mainloop_end) {
/* Check for events */
while (SDL_PollEvent(&sdl_ev)) {
if (sdl_ev.type == SDL_QUIT || sdl_ev.type == SDL_KEYDOWN) {
mainloop_end = 1;
}
}
/* Draw a gray background */
SDL_SetRenderDrawColor(sdl_rend, 0xA0, 0xA0, 0xA0, 0xFF);
SDL_RenderClear(sdl_rend);
/* Blit the sprite onto the screen */
SDL_RenderCopy(sdl_rend, t1, &t1_src, &t1_dst);
/* Update the screen */
SDL_RenderPresent(sdl_rend);
/* Change source rectangle to go to the next animation step */
t1_src.y = (t1_src.y + t1_src.h) % t1_size.h;
/* Change dest rectangle to move the sprite if the animation cycle restart */
if (t1_src.y == 0) {
t1_dst.x++;
t1_dst.y++;
}
SDL_Delay(50);
}
SDL_DestroyTexture(t1);
SDL_DestroyRenderer(sdl_rend);
SDL_DestroyWindow(sdl_win);
SDL_Quit();
return 0;
}
void my_SDL_init_or_die(char title[], SDL_Rect win_pos, Uint32 init_flags, Uint32 win_flags, Uint32 rend_flags, SDL_Window **win, SDL_Renderer **rend, SDL_RendererInfo *rend_info, SDL_Rect *viewport)
{
int res, i;
Uint32 tf;
res=SDL_Init(init_flags);
MPL_CHECK(
res==0, // Expression to evaluate
{exit(1);} , // Code to execute if expression is not true
SDL_LOG_PRIORITY_CRITICAL, // SDL_LogPriority (_CRITICAL, _ERROR, _WARN, _INFO, DEBUG, _VERBOSE)
"SDL_Init failed (%i)",res // var args list starting with a fmt string like in printf()
);
*win=SDL_CreateWindow(title,win_pos.x,win_pos.y,win_pos.w,win_pos.h,win_flags);
MPL_CHECK(
*win, // Just put the pointer if you want to check if it's not NULL
{SDL_Quit(); exit(2);},
SDL_LOG_PRIORITY_CRITICAL,
"SDL_CreateWindow failed"
);
SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION,SDL_LOG_PRIORITY_INFO,
"SDL_GetWindowPixelFormat() returns %i", SDL_GetWindowPixelFormat(*win)
);
*rend=SDL_CreateRenderer(*win,-1, rend_flags);
MPL_CHECK(
*rend,
{SDL_DestroyWindow(*win);SDL_Quit(); exit(3);},
SDL_LOG_PRIORITY_CRITICAL,
"SDL_CreateRenderer(...,SDL_RENDERER_ACCELERATED) failed"
);
res=SDL_GetRendererInfo(*rend, rend_info);
MPL_CHECK(
res==0,
{SDL_DestroyRenderer(*rend);SDL_DestroyWindow(*win);SDL_Quit(); exit(4);},
SDL_LOG_PRIORITY_CRITICAL,
"res=SDL_GetRendererInfo() failed"
);
tf=1;
for(i=0;i<16 && tf!=0;i++) {
tf=rend_info->texture_formats[i];
SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION,SDL_LOG_PRIORITY_INFO,
"rend_info->texture_formats[%i] == %i", i, tf
);
}
SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION,SDL_LOG_PRIORITY_INFO,
"rend_info->flags==%i", rend_info->flags );
if ( (rend_info->flags & SDL_RENDERER_SOFTWARE) == SDL_RENDERER_SOFTWARE) {
SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION,SDL_LOG_PRIORITY_INFO,
"rend_info->flags contains SDL_RENDERER_SOFTWARE");
}
if ( (rend_info->flags & SDL_RENDERER_ACCELERATED) == SDL_RENDERER_ACCELERATED) {
SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION,SDL_LOG_PRIORITY_INFO,
"rend_info->flags contains SDL_RENDERER_ACCELERATED");
}
if ( (rend_info->flags & SDL_RENDERER_PRESENTVSYNC) == SDL_RENDERER_PRESENTVSYNC) {
SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION,SDL_LOG_PRIORITY_INFO,
"rend_info->flags contains SDL_RENDERER_PRESENTVSYNC");
}
if ( (rend_info->flags & SDL_RENDERER_TARGETTEXTURE) == SDL_RENDERER_TARGETTEXTURE) {
SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION,SDL_LOG_PRIORITY_INFO,
"rend_info->flags contains SDL_RENDERER_TARGETTEXTURE");
}
// Remarks : When the window is resized, the current viewport is automatically centered within the new window size.
SDL_RenderGetViewport(*rend, viewport);
}
SDL_Texture * my_sdl_load_texture(SDL_Renderer *rend, char *giffilepath, SDL_Rect *size) {
SDL_Surface *s;
SDL_Texture *t;
SDL_RWops *rwop;
//int res;
rwop = SDL_RWFromFile(giffilepath,"r");
s = IMG_LoadGIF_RW(rwop);
SDL_RWclose(rwop);
MPL_CHECK(
s,
{return NULL;},
SDL_LOG_PRIORITY_WARN,
"my_sdl_load_texture(rend, \"%s\") failed",giffilepath
);
t = SDL_CreateTextureFromSurface(rend, s);
MPL_CHECK(
t,
{SDL_FreeSurface(s); return NULL;},
SDL_LOG_PRIORITY_WARN,
"my_sdl_load_texture(rend, \"%s\") : can't convert surface to texture",giffilepath
);
if (size != NULL) {
size->x=0; size->y=0;
size->w=s->w; size->h=s->h;
}
/* Surface no longer useful (everything was copied in the texture) */
SDL_FreeSurface(s);
return t;
}
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