add files

2018-06-23 10:56:10 +02:00 · 2018-06-23 10:56:10 +02:00 · db33c2fb08
commit db33c2fb08
1284 changed files with 183815 additions and 0 deletions
--- a/share/doc/ImageMagick-7/www/source/contrast.c
+++ b/share/doc/ImageMagick-7/www/source/contrast.c
@ -0,0 +1,106 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <wand/MagickWand.h>
+
+int main(int argc,char **argv)
+{
+#define QuantumScale  ((MagickRealType) 1.0/(MagickRealType) QuantumRange)
+#define SigmoidalContrast(x) \
+  (QuantumRange*(1.0/(1+exp(10.0*(0.5-QuantumScale*x)))-0.0066928509)*1.0092503)
+#define ThrowWandException(wand) \
+{ \
+  char \
+    *description; \
+ \
+  ExceptionType \
+    severity; \
+ \
+  description=MagickGetException(wand,&severity); \
+  (void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description); \
+  description=(char *) MagickRelinquishMemory(description); \
+  exit(-1); \
+}
+
+  MagickBooleanType
+    status;
+
+  MagickPixelPacket
+    pixel;
+
+  MagickWand
+    *contrast_wand,
+    *image_wand;
+
+  PixelIterator
+    *contrast_iterator,
+    *iterator;
+
+  PixelWand
+    **contrast_pixels,
+    **pixels;
+
+  register ssize_t
+    x;
+
+  size_t
+    width;
+
+  ssize_t
+    y;
+
+  if (argc != 3)
+    {
+      (void) fprintf(stdout,"Usage: %s image sigmoidal-image\n",argv[0]);
+      exit(0);
+    }
+  /*
+    Read an image.
+  */
+  MagickWandGenesis();
+  image_wand=NewMagickWand();
+  status=MagickReadImage(image_wand,argv[1]);
+  if (status == MagickFalse)
+    ThrowWandException(image_wand);
+  contrast_wand=CloneMagickWand(image_wand);
+  /*
+    Sigmoidal non-linearity contrast control.
+  */
+  iterator=NewPixelIterator(image_wand);
+  contrast_iterator=NewPixelIterator(contrast_wand);
+  if ((iterator == (PixelIterator *) NULL) ||
+      (contrast_iterator == (PixelIterator *) NULL))
+    ThrowWandException(image_wand);
+  for (y=0; y < (ssize_t) MagickGetImageHeight(image_wand); y++)
+  {
+    pixels=PixelGetNextIteratorRow(iterator,&width);
+    contrast_pixels=PixelGetNextIteratorRow(contrast_iterator,&width);
+    if ((pixels == (PixelWand **) NULL) ||
+        (contrast_pixels == (PixelWand **) NULL))
+      break;
+    for (x=0; x < (ssize_t) width; x++)
+    {
+      PixelGetMagickColor(pixels[x],&pixel);
+      pixel.red=SigmoidalContrast(pixel.red);
+      pixel.green=SigmoidalContrast(pixel.green);
+      pixel.blue=SigmoidalContrast(pixel.blue);
+      pixel.index=SigmoidalContrast(pixel.index);
+      PixelSetMagickColor(contrast_pixels[x],&pixel);
+    }
+    (void) PixelSyncIterator(contrast_iterator);
+  }
+  if (y < (ssize_t) MagickGetImageHeight(image_wand))
+    ThrowWandException(image_wand);
+  contrast_iterator=DestroyPixelIterator(contrast_iterator);
+  iterator=DestroyPixelIterator(iterator);
+  image_wand=DestroyMagickWand(image_wand);
+  /*
+    Write the image then destroy it.
+  */
+  status=MagickWriteImages(contrast_wand,argv[2],MagickTrue);
+  if (status == MagickFalse)
+    ThrowWandException(image_wand);
+  contrast_wand=DestroyMagickWand(contrast_wand);
+  MagickWandTerminus();
+  return(0);
+}