61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
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/**
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* Automated SDL_Surface test.
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*
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* Written by Edgar Simo "bobbens"
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*
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* Released under Public Domain.
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*/
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#include "SDL.h"
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#include "SDL_at.h"
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#include "common/common.h"
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/**
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* @brief Compares a surface and a surface image for equality.
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*/
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int surface_compare( SDL_Surface *sur, const SurfaceImage_t *img )
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{
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int ret;
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int i,j;
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int bpp;
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Uint8 *p, *pd;
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/* Make sure size is the same. */
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if ((sur->w != img->width) || (sur->h != img->height))
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return -1;
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SDL_LockSurface( sur );
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ret = 0;
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bpp = sur->format->BytesPerPixel;
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/* Compare image - should be same format. */
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for (j=0; j<sur->h; j++) {
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for (i=0; i<sur->w; i++) {
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p = (Uint8 *)sur->pixels + j * sur->pitch + i * bpp;
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pd = (Uint8 *)img->pixel_data + (j*img->width + i) * img->bytes_per_pixel;
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switch (bpp) {
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case 1:
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case 2:
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case 3:
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ret += 1;
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printf("%d BPP not supported yet.\n",bpp);
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break;
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case 4:
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ret += !( (p[0] == pd[0]) &&
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(p[1] == pd[1]) &&
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(p[2] == pd[2]) );
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break;
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}
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}
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}
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SDL_UnlockSurface( sur );
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return ret;
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}
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