practice/loki_sample/simple_blit_example/blitting-surface-sdl.c
2016-11-07 19:35:17 -07:00

63 lines
1.4 KiB
C

/* Example of simple blitting with SD>. */
#include <SDL/SDL.h>
#include <stdio.h>
#include <stdlib.h>
int main()
{
SDL_Surface *screen;
SDL_Surface *image;
SDL_Rect src, dest;
/* init and check for errors*/
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Unable to init SDL: %s\n", SDL_GetError());
return 1;
}
atexit(SDL_Quit);
/* 256x256 hicolor (16-bit) */
screen = SDL_SetVideoMode(512, 512, 32, 0); // finding BMPs is hard // Doesn't work anyway...
//I seem to remem ber having htis problem before
if (screen == NULL) {
printf("Setting video mode failed: %s\n", SDL_GetError());
return 1;
}
/* Load bitmap file. SDL_LoadBMP returns a pointer to a new surface containing
* the loaded image. */
image = SDL_LoadBMP("test-image.bmp");
if (image == NULL) {
printf("Unable to load bitmap.\n");
return 1;
}
/* The SDL blitting function needs to know how much data
* to copy. We provide this with SDL_Rect structures, which
* define the source and destination rectangles. The areas
* shoul be the same; SDL does not currently handle image
* stretching. */
src.x = 0;
src.y = 0;
src.w = image->w; /* copy entire image */
src.h = image->h;
/* Draw the bitmap to the screen. It is not necessary to lock surfaces
* before blitting; SDL will handle that. */
SDL_BlitSurface(image, &src, screen, &dest);
SDL_Delay(3000);
/* Free memory allocated to the bitmap. */
SDL_FreeSurface(image);
return 0;
}