e957ccc22a
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404217
111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/**
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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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{
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int dist = 0;
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Uint8 R, G, B, A;
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SDL_GetRGBA(*(Uint32*)p, sur->format, &R, &G, &B, &A);
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if (img->bytes_per_pixel == 3) {
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dist += (R-pd[0])*(R-pd[0]);
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dist += (G-pd[1])*(G-pd[1]);
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dist += (B-pd[2])*(B-pd[2]);
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} else {
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dist += (R-pd[0])*(R-pd[0]);
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dist += (G-pd[1])*(G-pd[1]);
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dist += (B-pd[2])*(B-pd[2]);
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dist += (A-pd[3])*(A-pd[3]);
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}
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/* Allow up to sqrt(32) difference in blending accuracy */
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if (dist > 64) {
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/*printf("pixel %d,%d varies by %d\n", i, j, dist);*/
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++ret;
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}
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}
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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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if (ret) {
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SDL_SaveBMP(sur, "fail.bmp");
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SDL_LockSurface( sur );
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bpp = sur->format->BytesPerPixel;
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/* Compare image - should be same format. */
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if (bpp == 4) {
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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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Uint8 R, G, B, A;
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R = pd[0];
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G = pd[1];
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B = pd[2];
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if (img->bytes_per_pixel == 4) {
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A = pd[3];
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} else {
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A = 0;
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}
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*(Uint32*)p = (A << 24) | (R << 16) | (G << 8) | B;
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}
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}
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}
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SDL_UnlockSurface( sur );
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SDL_SaveBMP(sur, "good.bmp");
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}
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return ret;
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}
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