mirror of
https://github.com/Relintai/sdl2_frt.git
synced 2024-12-20 22:16:49 +01:00
108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely, subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
claim that you wrote the original software. If you use this software
|
|
in a product, an acknowledgment in the product documentation would be
|
|
appreciated but is not required.
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
misrepresented as being the original software.
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
|
|
/*
|
|
|
|
Based on automated SDL_Surface tests originally written by Edgar Simo 'bobbens'.
|
|
|
|
Rewritten for test lib by Andreas Schiffler.
|
|
|
|
*/
|
|
|
|
#include "SDL_config.h"
|
|
|
|
#include "SDL_test.h"
|
|
|
|
|
|
/* Counter for _CompareSurface calls; used for filename creation when comparisons fail */
|
|
static int _CompareSurfaceCount = 0;
|
|
|
|
/* Compare surfaces */
|
|
int SDLTest_CompareSurfaces(SDL_Surface *surface, SDL_Surface *referenceSurface, int allowable_error)
|
|
{
|
|
int ret;
|
|
int i,j;
|
|
int bpp, bpp_reference;
|
|
Uint8 *p, *p_reference;
|
|
int dist;
|
|
Uint8 R, G, B, A;
|
|
Uint8 Rd, Gd, Bd, Ad;
|
|
char imageFilename[128];
|
|
char referenceFilename[128];
|
|
|
|
/* Validate input surfaces */
|
|
if (surface == NULL || referenceSurface == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
/* Make sure surface size is the same. */
|
|
if ((surface->w != referenceSurface->w) || (surface->h != referenceSurface->h)) {
|
|
return -2;
|
|
}
|
|
|
|
/* Sanitize input value */
|
|
if (allowable_error<0) {
|
|
allowable_error = 0;
|
|
}
|
|
|
|
SDL_LockSurface( surface );
|
|
SDL_LockSurface( referenceSurface );
|
|
|
|
ret = 0;
|
|
bpp = surface->format->BytesPerPixel;
|
|
bpp_reference = referenceSurface->format->BytesPerPixel;
|
|
/* Compare image - should be same format. */
|
|
for (j=0; j<surface->h; j++) {
|
|
for (i=0; i<surface->w; i++) {
|
|
p = (Uint8 *)surface->pixels + j * surface->pitch + i * bpp;
|
|
p_reference = (Uint8 *)referenceSurface->pixels + j * referenceSurface->pitch + i * bpp_reference;
|
|
|
|
SDL_GetRGBA(*(Uint32*)p, surface->format, &R, &G, &B, &A);
|
|
SDL_GetRGBA(*(Uint32*)p_reference, referenceSurface->format, &Rd, &Gd, &Bd, &Ad);
|
|
|
|
dist = 0;
|
|
dist += (R-Rd)*(R-Rd);
|
|
dist += (G-Gd)*(G-Gd);
|
|
dist += (B-Bd)*(B-Bd);
|
|
|
|
/* Allow some difference in blending accuracy */
|
|
if (dist > allowable_error) {
|
|
ret++;
|
|
}
|
|
}
|
|
}
|
|
|
|
SDL_UnlockSurface( surface );
|
|
SDL_UnlockSurface( referenceSurface );
|
|
|
|
/* Save test image and reference for analysis on failures */
|
|
_CompareSurfaceCount++;
|
|
if (ret != 0) {
|
|
SDL_snprintf(imageFilename, 127, "CompareSurfaces%04d_TestOutput.bmp", _CompareSurfaceCount);
|
|
SDL_SaveBMP(surface, imageFilename);
|
|
SDL_snprintf(referenceFilename, 127, "CompareSurfaces%04d_Reference.bmp", _CompareSurfaceCount);
|
|
SDL_SaveBMP(referenceSurface, referenceFilename);
|
|
SDLTest_LogError("Surfaces from failed comparison saved as '%s' and '%s'", imageFilename, referenceFilename);
|
|
}
|
|
|
|
return ret;
|
|
}
|