diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/pdiff')
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/Makefile.am | 19 | ||||
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/Makefile.in | 1120 | ||||
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/args.c | 119 | ||||
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/args.h | 46 | ||||
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/gpl.txt | 340 | ||||
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/lpyramid.c | 116 | ||||
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/lpyramid.h | 32 | ||||
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/pdiff.c | 420 | ||||
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/pdiff.h | 40 | ||||
| -rw-r--r-- | libs/cairo-1.16.0/test/pdiff/perceptualdiff.c | 101 |
10 files changed, 2353 insertions, 0 deletions
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you can redistribute it and/or modify it under the terms of the + GNU General Public License as published by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with this program; + if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA +*/ + +#include "args.h" +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +static const char* copyright = +"PerceptualDiff version 1.0, Copyright (C) 2006 Yangli Hector Yee\n\ +PerceptualDiff comes with ABSOLUTELY NO WARRANTY;\n\ +This is free software, and you are welcome\n\ +to redistribute it under certain conditions;\n\ +See the GPL page for details: http://www.gnu.org/copyleft/gpl.html\n\n"; + +static const char *usage = +"PeceptualDiff image1.tif image2.tif\n\n\ + Compares image1.tif and image2.tif using a perceptually based image metric\n\ + Options:\n\ +\t-verbose : Turns on verbose mode\n\ +\t-fov deg : Field of view in degrees (0.1 to 89.9)\n\ +\t-threshold p : #pixels p below which differences are ignored\n\ +\t-gamma g : Value to convert rgb into linear space (default 2.2)\n\ +\t-luminance l : White luminance (default 100.0 cdm^-2)\n\ +\n\ +\n Note: Input files can also be in the PNG format\ +\n"; + +void +args_init (args_t *args) +{ + args->surface_a = NULL; + args->surface_b = NULL; + args->Verbose = false; + args->FieldOfView = 45.0f; + args->Gamma = 2.2f; + args->ThresholdPixels = 100; + args->Luminance = 100.0f; +} + +void +args_fini (args_t *args) +{ + cairo_surface_destroy (args->surface_a); + cairo_surface_destroy (args->surface_b); +} + +bool +args_parse (args_t *args, int argc, char **argv) +{ + int i; + if (argc < 3) { + fprintf (stderr, "%s", copyright); + fprintf (stderr, "%s", usage); + return false; + } + for (i = 0; i < argc; i++) { + if (i == 1) { + args->surface_a = cairo_image_surface_create_from_png (argv[1]); + if (cairo_surface_status (args->surface_a)) + { + fprintf (stderr, "FAIL: Cannot open %s: %s\n", + argv[1], cairo_status_to_string (cairo_surface_status (args->surface_a))); + return false; + } + } else if (i == 2) { + args->surface_b = cairo_image_surface_create_from_png (argv[2]); + if (cairo_surface_status (args->surface_b)) + { + fprintf (stderr, "FAIL: Cannot open %s: %s\n", + argv[2], cairo_status_to_string (cairo_surface_status (args->surface_b))); + return false; + } + } else { + if (strstr(argv[i], "-fov")) { + if (i + 1 < argc) { + args->FieldOfView = (float) atof(argv[i + 1]); + } + } else if (strstr(argv[i], "-verbose")) { + args->Verbose = true; + } else if (strstr(argv[i], "-threshold")) { + if (i + 1 < argc) { + args->ThresholdPixels = atoi(argv[i + 1]); + } + } else if (strstr(argv[i], "-gamma")) { + if (i + 1 < argc) { + args->Gamma = (float) atof(argv[i + 1]); + } + }else if (strstr(argv[i], "-luminance")) { + if (i + 1 < argc) { + args->Luminance = (float) atof(argv[i + 1]); + } + } + } + } /* i */ + return true; +} + +void +args_print (args_t *args) +{ + printf("Field of view is %f degrees\n", args->FieldOfView); + printf("Threshold pixels is %d pixels\n", args->ThresholdPixels); + printf("The Gamma is %f\n", args->Gamma); + printf("The Display's luminance is %f candela per meter squared\n", args->Luminance); +} diff --git a/libs/cairo-1.16.0/test/pdiff/args.h b/libs/cairo-1.16.0/test/pdiff/args.h new file mode 100644 index 0000000..5020239 --- /dev/null +++ b/libs/cairo-1.16.0/test/pdiff/args.h @@ -0,0 +1,46 @@ +/* + Comapre Args + Copyright (C) 2006 Yangli Hector Yee + + This program is free software; you can redistribute it and/or modify it under the terms of the + GNU General Public License as published by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with this program; + if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA +*/ + +#ifndef _ARGS_H +#define _ARGS_H + +#include "pdiff.h" + +/* Args to pass into the comparison function */ +typedef struct _args +{ + cairo_surface_t *surface_a; /* Image A */ + cairo_surface_t *surface_b; /* Image B */ + bool Verbose; /* Print lots of text or not */ + float FieldOfView; /* Field of view in degrees */ + float Gamma; /* The gamma to convert to linear color space */ + float Luminance; /* the display's luminance */ + unsigned int ThresholdPixels; /* How many pixels different to ignore */ +} args_t; + +void +args_init (args_t *args); + +void +args_fini (args_t *args); + +bool +args_parse (args_t *args, int argc, char **argv); + +void +args_print (args_t *args); + +#endif diff --git a/libs/cairo-1.16.0/test/pdiff/gpl.txt b/libs/cairo-1.16.0/test/pdiff/gpl.txt new file mode 100644 index 0000000..f90922e --- /dev/null +++ b/libs/cairo-1.16.0/test/pdiff/gpl.txt @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/libs/cairo-1.16.0/test/pdiff/lpyramid.c b/libs/cairo-1.16.0/test/pdiff/lpyramid.c new file mode 100644 index 0000000..bd402c7 --- /dev/null +++ b/libs/cairo-1.16.0/test/pdiff/lpyramid.c @@ -0,0 +1,116 @@ +/* + Laplacian Pyramid + Copyright (C) 2006 Yangli Hector Yee + + This program is free software; you can redistribute it and/or modify it under the terms of the + GNU General Public License as published by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with this program; + if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA +*/ + +#include "lpyramid.h" +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +struct _lpyramid { + /* Successively blurred versions of the original image */ + float *levels[MAX_PYR_LEVELS]; + + int width; + int height; +}; + +static void +convolve (lpyramid_t *pyramid, float *a, const float *b) +/* convolves image b with the filter kernel and stores it in a */ +{ + int y,x,i,j; + const float Kernel[] = {0.05f, 0.25f, 0.4f, 0.25f, 0.05f}; + int width = pyramid->width; + int height = pyramid->height; + + for (y=0; y<height; y++) { + for (x=0; x<width; x++) { + float sum = 0.f; + for (j=-2; j<=2; j++) { + float sum_i = 0.f; + int ny=y+j; + if (ny<0) ny=-ny; + if (ny>=height) ny=2*height - ny - 1; + ny *= width; + for (i=-2; i<=2; i++) { + int nx=x+i; + if (nx<0) nx=-nx; + if (nx>=width) nx=2*width - nx - 1; + sum_i += Kernel[i+2] * b[ny + nx]; + } + sum += sum_i * Kernel[j+2]; + } + *a++ = sum; + } + } +} + +/* + * Construction/Destruction + */ + +lpyramid_t * +lpyramid_create (float *image, int width, int height) +{ + lpyramid_t *pyramid; + int i; + + pyramid = malloc (sizeof (lpyramid_t)); + if (pyramid == NULL) { + fprintf (stderr, "Out of memory.\n"); + exit (1); + } + pyramid->width = width; + pyramid->height = height; + + /* Make the Laplacian pyramid by successively + * copying the earlier levels and blurring them */ + for (i=0; i<MAX_PYR_LEVELS; i++) { + pyramid->levels[i] = malloc (width * height * sizeof (float)); + if (pyramid->levels[i] == NULL) { + fprintf (stderr, "Out of memory.\n"); + exit (1); + } + if (i == 0) { + memcpy (pyramid->levels[i], image, width * height * sizeof (float)); + } else { + convolve(pyramid, pyramid->levels[i], pyramid->levels[i - 1]); + } + } + + return pyramid; +} + +void +lpyramid_destroy (lpyramid_t *pyramid) +{ + int i; + + for (i=0; i<MAX_PYR_LEVELS; i++) + free (pyramid->levels[i]); + + free (pyramid); +} + +float +lpyramid_get_value (lpyramid_t *pyramid, int x, int y, int level) +{ + int index = x + y * pyramid->width; + int l = level; + if (l > MAX_PYR_LEVELS) + l = MAX_PYR_LEVELS; + return pyramid->levels[l][index]; +} diff --git a/libs/cairo-1.16.0/test/pdiff/lpyramid.h b/libs/cairo-1.16.0/test/pdiff/lpyramid.h new file mode 100644 index 0000000..e47a66e --- /dev/null +++ b/libs/cairo-1.16.0/test/pdiff/lpyramid.h @@ -0,0 +1,32 @@ +/* + Laplacian Pyramid + Copyright (C) 2006 Yangli Hector Yee + + This program is free software; you can redistribute it and/or modify it under the terms of the + GNU General Public License as published by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with this program; + if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA +*/ +#ifndef _LPYRAMID_H +#define _LPYRAMID_H + +#define MAX_PYR_LEVELS 8 + +typedef struct _lpyramid lpyramid_t; + +lpyramid_t * +lpyramid_create (float *image, int width, int height); + +void +lpyramid_destroy (lpyramid_t *pyramid); + +float +lpyramid_get_value (lpyramid_t *pyramid, int x, int y, int level); + +#endif /* _LPYRAMID_H */ diff --git a/libs/cairo-1.16.0/test/pdiff/pdiff.c b/libs/cairo-1.16.0/test/pdiff/pdiff.c new file mode 100644 index 0000000..eb5f156 --- /dev/null +++ b/libs/cairo-1.16.0/test/pdiff/pdiff.c @@ -0,0 +1,420 @@ +/* + Metric + Copyright (C) 2006 Yangli Hector Yee + + This program is free software; you can redistribute it and/or modify it under the terms of the + GNU General Public License as published by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with this program; + if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA +*/ + +#define _GNU_SOURCE + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include "lpyramid.h" +#include <math.h> +#include <stdio.h> +#include <stdlib.h> + +#if HAVE_STDINT_H +# include <stdint.h> +#elif HAVE_INTTYPES_H +# include <inttypes.h> +#elif HAVE_SYS_INT_TYPES_H +# include <sys/int_types.h> +#elif defined(_MSC_VER) + typedef __int8 int8_t; + typedef unsigned __int8 uint8_t; + typedef __int16 int16_t; + typedef unsigned __int16 uint16_t; + typedef __int32 int32_t; + typedef unsigned __int32 uint32_t; + typedef __int64 int64_t; + typedef unsigned __int64 uint64_t; +# ifndef HAVE_UINT64_T +# define HAVE_UINT64_T 1 +# endif +# ifndef INT16_MIN +# define INT16_MIN (-32767-1) +# endif +# ifndef INT16_MAX +# define INT16_MAX (32767) +# endif +# ifndef UINT16_MAX +# define UINT16_MAX (65535) +# endif +#else +#error Cannot find definitions for fixed-width integral types (uint8_t, uint32_t, etc.) +#endif + +#include "pdiff.h" + +#ifndef M_PI +#define M_PI 3.14159265f +#endif + +#ifndef __USE_ISOC99 +#define expf exp +#define powf pow +#define fabsf fabs +#define sqrtf sqrt +#define log10f log10 +#endif + +/* + * Given the adaptation luminance, this function returns the + * threshold of visibility in cd per m^2 + * TVI means Threshold vs Intensity function + * This version comes from Ward Larson Siggraph 1997 + */ +static float +tvi (float adaptation_luminance) +{ + /* returns the threshold luminance given the adaptation luminance + units are candelas per meter squared + */ + float log_a, r, result; + log_a = log10f(adaptation_luminance); + + if (log_a < -3.94f) { + r = -2.86f; + } else if (log_a < -1.44f) { + r = powf(0.405f * log_a + 1.6f , 2.18f) - 2.86f; + } else if (log_a < -0.0184f) { + r = log_a - 0.395f; + } else if (log_a < 1.9f) { + r = powf(0.249f * log_a + 0.65f, 2.7f) - 0.72f; + } else { + r = log_a - 1.255f; + } + + result = powf(10.0f , r); + + return result; +} + +/* computes the contrast sensitivity function (Barten SPIE 1989) + * given the cycles per degree (cpd) and luminance (lum) + */ +static float +csf (float cpd, float lum) +{ + float a, b, result; + + a = 440.0f * powf((1.0f + 0.7f / lum), -0.2f); + b = 0.3f * powf((1.0f + 100.0f / lum), 0.15f); + + result = a * cpd * expf(-b * cpd) * sqrtf(1.0f + 0.06f * expf(b * cpd)); + + return result; +} + +/* + * Visual Masking Function + * from Daly 1993 + */ +static float +mask (float contrast) +{ + float a, b, result; + a = powf(392.498f * contrast, 0.7f); + b = powf(0.0153f * a, 4.0f); + result = powf(1.0f + b, 0.25f); + + return result; +} + +/* convert Adobe RGB (1998) with reference white D65 to XYZ */ +static void +AdobeRGBToXYZ (float r, float g, float b, float *x, float *y, float *z) +{ + /* matrix is from http://www.brucelindbloom.com/ */ + *x = r * 0.576700f + g * 0.185556f + b * 0.188212f; + *y = r * 0.297361f + g * 0.627355f + b * 0.0752847f; + *z = r * 0.0270328f + g * 0.0706879f + b * 0.991248f; +} + +static void +XYZToLAB (float x, float y, float z, float *L, float *A, float *B) +{ + static float xw = -1; + static float yw; + static float zw; + const float epsilon = 216.0f / 24389.0f; + const float kappa = 24389.0f / 27.0f; + float f[3]; + float r[3]; + int i; + + /* reference white */ + if (xw < 0) { + AdobeRGBToXYZ(1, 1, 1, &xw, &yw, &zw); + } + r[0] = x / xw; + r[1] = y / yw; + r[2] = z / zw; + for (i = 0; i < 3; i++) { + if (r[i] > epsilon) { + f[i] = powf(r[i], 1.0f / 3.0f); + } else { + f[i] = (kappa * r[i] + 16.0f) / 116.0f; + } + } + *L = 116.0f * f[1] - 16.0f; + *A = 500.0f * (f[0] - f[1]); + *B = 200.0f * (f[1] - f[2]); +} + +static uint32_t +_get_pixel (const uint32_t *data, int i) +{ + return data[i]; +} + +static unsigned char +_get_red (const uint32_t *data, int i) +{ + uint32_t pixel; + uint8_t alpha; + + pixel = _get_pixel (data, i); + alpha = (pixel & 0xff000000) >> 24; + if (alpha == 0) + return 0; + else + return (((pixel & 0x00ff0000) >> 16) * 255 + alpha / 2) / alpha; +} + +static unsigned char +_get_green (const uint32_t *data, int i) +{ + uint32_t pixel; + uint8_t alpha; + + pixel = _get_pixel (data, i); + alpha = (pixel & 0xff000000) >> 24; + if (alpha == 0) + return 0; + else + return (((pixel & 0x0000ff00) >> 8) * 255 + alpha / 2) / alpha; +} + +static unsigned char +_get_blue (const uint32_t *data, int i) +{ + uint32_t pixel; + uint8_t alpha; + + pixel = _get_pixel (data, i); + alpha = (pixel & 0xff000000) >> 24; + if (alpha == 0) + return 0; + else + return (((pixel & 0x000000ff) >> 0) * 255 + alpha / 2) / alpha; +} + +static void * +xmalloc (size_t size) +{ + void *buf; + + buf = malloc (size); + if (buf == NULL) { + fprintf (stderr, "Out of memory.\n"); + exit (1); + } + + return buf; +} + +int +pdiff_compare (cairo_surface_t *surface_a, + cairo_surface_t *surface_b, + double gamma, + double luminance, + double field_of_view) +{ + unsigned int dim = (cairo_image_surface_get_width (surface_a) + * cairo_image_surface_get_height (surface_a)); + unsigned int i; + + /* assuming colorspaces are in Adobe RGB (1998) convert to XYZ */ + float *aX; + float *aY; + float *aZ; + float *bX; + float *bY; + float *bZ; + float *aLum; + float *bLum; + + float *aA; + float *bA; + float *aB; + float *bB; + + unsigned int x, y, w, h; + + lpyramid_t *la, *lb; + + float num_one_degree_pixels, pixels_per_degree, num_pixels; + unsigned int adaptation_level; + + float cpd[MAX_PYR_LEVELS]; + float F_freq[MAX_PYR_LEVELS - 2]; + float csf_max; + const uint32_t *data_a, *data_b; + + unsigned int pixels_failed; + + w = cairo_image_surface_get_width (surface_a); + h = cairo_image_surface_get_height (surface_a); + if (w < 3 || h < 3) /* too small for the Laplacian convolution */ + return -1; + + aX = xmalloc (dim * sizeof (float)); + aY = xmalloc (dim * sizeof (float)); + aZ = xmalloc (dim * sizeof (float)); + bX = xmalloc (dim * sizeof (float)); + bY = xmalloc (dim * sizeof (float)); + bZ = xmalloc (dim * sizeof (float)); + aLum = xmalloc (dim * sizeof (float)); + bLum = xmalloc (dim * sizeof (float)); + + aA = xmalloc (dim * sizeof (float)); + bA = xmalloc (dim * sizeof (float)); + aB = xmalloc (dim * sizeof (float)); + bB = xmalloc (dim * sizeof (float)); + + data_a = (uint32_t *) cairo_image_surface_get_data (surface_a); + data_b = (uint32_t *) cairo_image_surface_get_data (surface_b); + for (y = 0; y < h; y++) { + for (x = 0; x < w; x++) { + float r, g, b, l; + i = x + y * w; + r = powf(_get_red (data_a, i) / 255.0f, gamma); + g = powf(_get_green (data_a, i) / 255.0f, gamma); + b = powf(_get_blue (data_a, i) / 255.0f, gamma); + + AdobeRGBToXYZ(r,g,b,&aX[i],&aY[i],&aZ[i]); + XYZToLAB(aX[i], aY[i], aZ[i], &l, &aA[i], &aB[i]); + r = powf(_get_red (data_b, i) / 255.0f, gamma); + g = powf(_get_green (data_b, i) / 255.0f, gamma); + b = powf(_get_blue (data_b, i) / 255.0f, gamma); + + AdobeRGBToXYZ(r,g,b,&bX[i],&bY[i],&bZ[i]); + XYZToLAB(bX[i], bY[i], bZ[i], &l, &bA[i], &bB[i]); + aLum[i] = aY[i] * luminance; + bLum[i] = bY[i] * luminance; + } + } + + la = lpyramid_create (aLum, w, h); + lb = lpyramid_create (bLum, w, h); + + num_one_degree_pixels = (float) (2 * tan(field_of_view * 0.5 * M_PI / 180) * 180 / M_PI); + pixels_per_degree = w / num_one_degree_pixels; + + num_pixels = 1; + adaptation_level = 0; + for (i = 0; i < MAX_PYR_LEVELS; i++) { + adaptation_level = i; + if (num_pixels > num_one_degree_pixels) break; + num_pixels *= 2; + } + + cpd[0] = 0.5f * pixels_per_degree; + for (i = 1; i < MAX_PYR_LEVELS; i++) cpd[i] = 0.5f * cpd[i - 1]; + csf_max = csf(3.248f, 100.0f); + + for (i = 0; i < MAX_PYR_LEVELS - 2; i++) F_freq[i] = csf_max / csf( cpd[i], 100.0f); + + pixels_failed = 0; + for (y = 0; y < h; y++) { + for (x = 0; x < w; x++) { + int index = x + y * w; + float contrast[MAX_PYR_LEVELS - 2]; + float F_mask[MAX_PYR_LEVELS - 2]; + float factor; + float delta; + float adapt; + bool pass; + float sum_contrast = 0; + for (i = 0; i < MAX_PYR_LEVELS - 2; i++) { + float n1 = fabsf(lpyramid_get_value (la,x,y,i) - lpyramid_get_value (la,x,y,i + 1)); + float n2 = fabsf(lpyramid_get_value (lb,x,y,i) - lpyramid_get_value (lb,x,y,i + 1)); + float numerator = (n1 > n2) ? n1 : n2; + float d1 = fabsf(lpyramid_get_value(la,x,y,i+2)); + float d2 = fabsf(lpyramid_get_value(lb,x,y,i+2)); + float denominator = (d1 > d2) ? d1 : d2; + if (denominator < 1e-5f) denominator = 1e-5f; + contrast[i] = numerator / denominator; + sum_contrast += contrast[i]; + } + if (sum_contrast < 1e-5) sum_contrast = 1e-5f; + adapt = lpyramid_get_value(la,x,y,adaptation_level) + lpyramid_get_value(lb,x,y,adaptation_level); + adapt *= 0.5f; + if (adapt < 1e-5) adapt = 1e-5f; + for (i = 0; i < MAX_PYR_LEVELS - 2; i++) { + F_mask[i] = mask(contrast[i] * csf(cpd[i], adapt)); + } + factor = 0; + for (i = 0; i < MAX_PYR_LEVELS - 2; i++) { + factor += contrast[i] * F_freq[i] * F_mask[i] / sum_contrast; + } + if (factor < 1) factor = 1; + if (factor > 10) factor = 10; + delta = fabsf(lpyramid_get_value(la,x,y,0) - lpyramid_get_value(lb,x,y,0)); + pass = true; + /* pure luminance test */ + if (delta > factor * tvi(adapt)) { + pass = false; + } else { + /* CIE delta E test with modifications */ + float color_scale = 1.0f; + float da = aA[index] - bA[index]; + float db = aB[index] - bB[index]; + float delta_e; + /* ramp down the color test in scotopic regions */ + if (adapt < 10.0f) { + color_scale = 1.0f - (10.0f - color_scale) / 10.0f; + color_scale = color_scale * color_scale; + } + da = da * da; + db = db * db; + delta_e = (da + db) * color_scale; + if (delta_e > factor) { + pass = false; + } + } + if (!pass) + pixels_failed++; + } + } + + free (aX); + free (aY); + free (aZ); + free (bX); + free (bY); + free (bZ); + free (aLum); + free (bLum); + lpyramid_destroy (la); + lpyramid_destroy (lb); + free (aA); + free (bA); + free (aB); + free (bB); + + return pixels_failed; +} diff --git a/libs/cairo-1.16.0/test/pdiff/pdiff.h b/libs/cairo-1.16.0/test/pdiff/pdiff.h new file mode 100644 index 0000000..30fec06 --- /dev/null +++ b/libs/cairo-1.16.0/test/pdiff/pdiff.h @@ -0,0 +1,40 @@ +/* + Copyright (C) 2006 Yangli Hector Yee + Copyright (C) 2006 Red Hat, Inc. + + This program is free software; you can redistribute it and/or modify it under the terms of the + GNU General Public License as published by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with this program; + if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA +*/ + +#ifndef _PDIFF_H +#define _PDIFF_H + +#include <cairo.h> + +typedef int bool; +#ifndef true +#define true 1 +#endif +#ifndef false +#define false 0 +#endif + +/* Image comparison metric using Yee's method (and a cairo interface) + * References: A Perceptual Metric for Production Testing, Hector Yee, Journal of Graphics Tools 2004 + */ +int +pdiff_compare (cairo_surface_t *surface_a, + cairo_surface_t *surface_b, + double gamma, + double luminance, + double field_of_view); + +#endif diff --git a/libs/cairo-1.16.0/test/pdiff/perceptualdiff.c b/libs/cairo-1.16.0/test/pdiff/perceptualdiff.c new file mode 100644 index 0000000..5850dc9 --- /dev/null +++ b/libs/cairo-1.16.0/test/pdiff/perceptualdiff.c @@ -0,0 +1,101 @@ +/* + PerceptualDiff - a program that compares two images using a perceptual metric + based on the paper : + A perceptual metric for production testing. Journal of graphics tools, 9(4):33-40, 2004, Hector Yee + Copyright (C) 2006 Yangli Hector Yee + + This program is free software; you can redistribute it and/or modify it under the terms of the + GNU General Public License as published by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with this program; + if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA +*/ + +#include <stdio.h> +#include <stdint.h> +#include <string.h> +#include <math.h> +#include "lpyramid.h" +#include "args.h" +#include "pdiff.h" + +static bool Yee_Compare(args_t *args) +{ + unsigned int width_a, height_a, stride_a; + unsigned char *data_a, *row_a; + uint32_t *pixel_a; + unsigned int width_b, height_b, stride_b; + unsigned char *data_b, *row_b; + uint32_t *pixel_b; + unsigned int x, y, pixels_failed; + bool identical = true; + + width_a = cairo_image_surface_get_width (args->surface_a); + height_a = cairo_image_surface_get_height (args->surface_a); + stride_a = cairo_image_surface_get_stride (args->surface_a); + data_a = cairo_image_surface_get_data (args->surface_a); + + width_b = cairo_image_surface_get_width (args->surface_b); + height_b = cairo_image_surface_get_height (args->surface_b); + stride_b = cairo_image_surface_get_stride (args->surface_b); + data_b = cairo_image_surface_get_data (args->surface_b); + + if ((width_a != width_b) || (height_a != height_b)) { + printf ("FAIL: Image dimensions do not match\n"); + return false; + } + + identical = true; + + for (y = 0; y < height_a; y++) { + row_a = data_a + y * stride_a; + row_b = data_b + y * stride_b; + pixel_a = (uint32_t *) row_a; + pixel_b = (uint32_t *) row_b; + for (x = 0; x < width_a; x++) { + if (*pixel_a != *pixel_b) { + identical = false; + } + pixel_a++; + pixel_b++; + } + } + if (identical) { + printf ("PASS: Images are binary identical\n"); + return true; + } + + pixels_failed = pdiff_compare (args->surface_a, args->surface_b, + args->Gamma, args->Luminance, + args->FieldOfView); + + if (pixels_failed < args->ThresholdPixels) { + printf ("PASS: Images are perceptually indistinguishable\n"); + return true; + } + + printf("FAIL: Images are visibly different\n" + "%d pixels are different\n", pixels_failed); + + return false; +} + +int main(int argc, char **argv) +{ + args_t args; + + args_init (&args); + + if (!args_parse (&args, argc, argv)) { + return -1; + } else { + if (args.Verbose) + args_print (&args); + } + return ! Yee_Compare(&args); +} |