early-access version 1611

2021-04-18 05:35:25 +02:00
parent 16f54e367d
commit 18db69f039
1409 changed files with 545335 additions and 10 deletions
--- a/externals/SDL/src/test/SDL_test_compare.c
+++ b/externals/SDL/src/test/SDL_test_compare.c
@@ -0,0 +1,117 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 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;
+   int sampleErrorX = 0, sampleErrorY = 0, sampleDist = 0;
+   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++;
+            if (ret == 1) {
+               sampleErrorX = i;
+               sampleErrorY = j;
+               sampleDist = dist;
+            }
+         }
+      }
+   }
+
+   SDL_UnlockSurface( surface );
+   SDL_UnlockSurface( referenceSurface );
+
+   /* Save test image and reference for analysis on failures */
+   _CompareSurfaceCount++;
+   if (ret != 0) {
+      SDLTest_LogError("Comparison of pixels with allowable error of %i failed %i times.", allowable_error, ret);
+      SDLTest_LogError("First detected occurrence at position %i,%i with a squared RGB-difference of %i.", sampleErrorX, sampleErrorY, sampleDist); 
+      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;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */