zenilib: zenilib/jni/external/sdl/src/test/SDL_test_compare.c Source File

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SDL_test_compare.c
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1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20 */
21
22 /*
23
24 Based on automated SDL_Surface tests originally written by Edgar Simo 'bobbens'.
25
26 Rewritten for test lib by Andreas Schiffler.
27
28 */
29
30 #include "SDL_config.h"
31
32 #include "SDL_test.h"
33
34
35 /* Counter for _CompareSurface calls; used for filename creation when comparisons fail */
36 static int _CompareSurfaceCount = 0;
37
38 /* Compare surfaces */
39 int SDLTest_CompareSurfaces(SDL_Surface *surface, SDL_Surface *referenceSurface, int allowable_error)
40 {
41 int ret;
42 int i,j;
43 int bpp, bpp_reference;
44 Uint8 *p, *p_reference;
45 int dist;
46 Uint8 R, G, B, A;
47 Uint8 Rd, Gd, Bd, Ad;
48 char imageFilename[128];
49 char referenceFilename[128];
50
51 /* Validate input surfaces */
52 if (surface == NULL || referenceSurface == NULL) {
53 return -1;
54 }
55
56 /* Make sure surface size is the same. */
57 if ((surface->w != referenceSurface->w) || (surface->h != referenceSurface->h)) {
58 return -2;
59 }
60
61 /* Sanitize input value */
62 if (allowable_error<0) {
63 allowable_error = 0;
64 }
65
66 SDL_LockSurface( surface );
67 SDL_LockSurface( referenceSurface );
68
69 ret = 0;
70 bpp = surface->format->BytesPerPixel;
71 bpp_reference = referenceSurface->format->BytesPerPixel;
72 /* Compare image - should be same format. */
73 for (j=0; j<surface->h; j++) {
74 for (i=0; i<surface->w; i++) {
75 p = (Uint8 *)surface->pixels + j * surface->pitch + i * bpp;
76 p_reference = (Uint8 *)referenceSurface->pixels + j * referenceSurface->pitch + i * bpp_reference;
77
78 SDL_GetRGBA(*(Uint32*)p, surface->format, &R, &G, &B, &A);
79 SDL_GetRGBA(*(Uint32*)p_reference, referenceSurface->format, &Rd, &Gd, &Bd, &Ad);
80
81 dist = 0;
82 dist += (R-Rd)*(R-Rd);
83 dist += (G-Gd)*(G-Gd);
84 dist += (B-Bd)*(B-Bd);
85
86 /* Allow some difference in blending accuracy */
87 if (dist > allowable_error) {
88 ret++;
89 }
90 }
91 }
92
93 SDL_UnlockSurface( surface );
94 SDL_UnlockSurface( referenceSurface );
95
96 /* Save test image and reference for analysis on failures */
97 _CompareSurfaceCount++;
98 if (ret != 0) {
99 SDL_snprintf(imageFilename, 127, "CompareSurfaces%04d_TestOutput.bmp", _CompareSurfaceCount);
100 SDL_SaveBMP(surface, imageFilename);
101 SDL_snprintf(referenceFilename, 127, "CompareSurfaces%04d_Reference.bmp", _CompareSurfaceCount);
102 SDL_SaveBMP(referenceSurface, referenceFilename);
103 SDLTest_LogError("Surfaces from failed comparison saved as '%s' and '%s'", imageFilename, referenceFilename);
104 }
105
106 return ret;
107 }
SDL_test.h
SDLTest_CompareSurfaces
int SDLTest_CompareSurfaces(SDL_Surface *surface, SDL_Surface *referenceSurface, int allowable_error)
Compares a surface and with reference image data for equality.
Definition: SDL_test_compare.c:39
NULL
#define NULL
Definition: ftobjs.h:61
SDL_Surface::h
int h
Definition: SDL_surface.h:73
SDL_snprintf
DECLSPEC int SDLCALL SDL_snprintf(char *text, size_t maxlen, const char *fmt,...)
Definition: SDL_string.c:1277
SDL_PixelFormat::BytesPerPixel
Uint8 BytesPerPixel
Definition: SDL_pixels.h:277
surface
EGLSurface surface
Definition: eglext.h:74
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
j
int32_t j
Definition: e_log.c:102
SDL_SaveBMP
#define SDL_SaveBMP(surface, file)
Definition: SDL_surface.h:199
SDL_Surface::w
int w
Definition: SDL_surface.h:73
_CompareSurfaceCount
static int _CompareSurfaceCount
Definition: SDL_test_compare.c:36
SDL_config.h
ret
ret
Definition: glew_str_glx.c:2
Uint32
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:145
SDL_UnlockSurface
DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface *surface)
Definition: SDL_surface.c:786
SDL_Surface::pixels
void * pixels
Definition: SDL_surface.h:75
p
GLfloat GLfloat p
Definition: glew.h:14938
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:72
SDL_GetRGBA
DECLSPEC void SDLCALL SDL_GetRGBA(Uint32 pixel, const SDL_PixelFormat *format, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a)
Get the RGBA components from a pixel of the specified format.
Definition: SDL_pixels.c:849
Uint8
uint8_t Uint8
An unsigned 8-bit integer type.
Definition: SDL_stdinc.h:129
G
#define G(x, y, z)
Definition: SDL_test_md5.c:74
SDL_Surface::pitch
int pitch
Definition: SDL_surface.h:74
R
R
Definition: e_log.c:153
i
int i
Definition: pngrutil.c:1377
SDL_LockSurface
DECLSPEC int SDLCALL SDL_LockSurface(SDL_Surface *surface)
Sets up a surface for directly accessing the pixels.
Definition: SDL_surface.c:765
SDLTest_LogError
void SDLTest_LogError(const char *fmt,...)
Prints given message with a timestamp in the TEST category and the ERROR priority.
Definition: SDL_test_log.c:89