From ba2bfacec6f2349e9c3b57608674cfb057591ee5 Mon Sep 17 00:00:00 2001
From: mutantturkey <mutantturke@gmail.com>
Date: Mon, 2 Jul 2012 08:35:39 -0400
Subject: code cleanups, all values will be positive - so don't check - should
 benefit performance

---
 fly-tools/derive-background/pixel.c | 109 +++++++++++++++++-------------------
 1 file changed, 52 insertions(+), 57 deletions(-)

(limited to 'fly-tools')

diff --git a/fly-tools/derive-background/pixel.c b/fly-tools/derive-background/pixel.c
index 605cfea..2330678 100644
--- a/fly-tools/derive-background/pixel.c
+++ b/fly-tools/derive-background/pixel.c
@@ -5,40 +5,45 @@
 #include <stdlib.h>
 #include <string.h>
 
-#define round(x)((x)>=0?(int)((x)+0.5):(int)((x)-0.5))
+//#define round(x)((x)>=0?(int)((x)+0.5):(int)((x)-0.5))
+#define round(x)((int)((x)+0.5))
 #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); }
-int
-findmax (uint8_t *p, int n)
+
+int findmax (uint8_t *p, int n)
 {
-   int mx = 0, v = p[0];
-    for (int i = 1; i < n; i++) {
-         if (p[i] > v) {
-                v = p[i];
-                     mx = i;
-                        }
-          }
-     return mx;
+  int mx = 0, v = p[0];
+  for (int i = 1; i < n; i++) {
+    if (p[i] > v) {
+      v = p[i];
+      mx = i;
+    }
+  }
+  return mx;
 }
 
 int main(int argc, char **argv ) {
 
-  MagickWand *magick_wand;
-  MagickWand *first_wand;
-  PixelIterator* iterator;
-  PixelWand **pixels;
+  MagickWand *magick_wand, *first_wand, *output_wand;
+  PixelIterator *input_iterator, *output_iterator;
+  PixelWand **pixels, *p_out;
 
   double green, red, blue;
+
   int i,j, k, x, y;
   int image = 0;
-  unsigned long height, width;
   int nImages = 0;
 
+  unsigned long height, width;
+
 
   char filename[256];
   char rgb[128];
   char *temp;
 
+  FILE *input_file;
+
   uint8_t ****array;
+  uint8_t ***output;
 
   // open the first image and get the height and width
   first_wand = NewMagickWand();
@@ -63,19 +68,24 @@ int main(int argc, char **argv ) {
     fclose(count);
   }
 
-  printf("number of imagges: %d \n", nImages);
+  printf("number of images: %d \n", nImages);
 
 
-  // initialize the storage array.
+  // initialize the storage arrays
+  output = calloc(height, sizeof(output[0]));
+  for(i = 0; i < height; i++) {
+    output[i] = calloc(width, sizeof(output[0][0]));
+    for(j = 0; j < width; j++) {
+      output[i][j] = calloc(3, sizeof(output[0][0][0]));
+    }
+  }
+
   array = calloc(nImages, sizeof(array[0]));
-  for(i = 0; i < nImages; i++)
-  {
+  for(i = 0; i < nImages; i++) {
     array[i] = calloc(height, sizeof(array[0][0]));
-    for(j = 0; j < (long) height; j++)
-    {
+    for(j = 0; j < (long) height; j++) {
       array[i][j] = calloc(width, sizeof(array[0][0][0]));
-      for(k = 0; k < width; k++)
-      {
+      for(k = 0; k < width; k++){
         array[i][j][k] = calloc(3, sizeof(array[0][0][0][0]));
       }
     }
@@ -84,7 +94,7 @@ int main(int argc, char **argv ) {
   MagickWandGenesis();
 
   // store each pixel in the storage array. array[nImage][height][width][ { R, G, B} ] 
-  FILE *input_file = fopen ( argv[1], "r" );
+  input_file = fopen ( argv[1], "r" );
   if ( input_file != NULL ) {
     while ((fgets(filename, sizeof(filename), input_file)) != NULL ) {
       temp = strchr(filename, '\n');
@@ -93,11 +103,11 @@ int main(int argc, char **argv ) {
       magick_wand = NewMagickWand();
       MagickReadImage(magick_wand, filename);
 
-      iterator = NewPixelIterator(magick_wand);
+      input_iterator = NewPixelIterator(magick_wand);
 
       printf("Image number:%d Filename: %s \n", image, filename);
       for (i=0; i<height; i++) {
-        pixels = PixelGetNextIteratorRow(iterator, &width);
+        pixels = PixelGetNextIteratorRow(input_iterator, &width);
         for (j=0; j<width ; j++) {
 
           green = PixelGetGreen(pixels[j]);
@@ -109,11 +119,10 @@ int main(int argc, char **argv ) {
           array[image][i][j][2] = round(blue*255); 
           // printf("array: (%d, %d,%d,%d,%d,%d) \n", image, i, j, array[image][i][j][0], array[image][i][j][1], array[image][i][j][2]);
         }
-        PixelSyncIterator(iterator);
+        PixelSyncIterator(input_iterator);
       }
-
-      PixelSyncIterator(iterator);
-      iterator=DestroyPixelIterator(iterator);
+      PixelSyncIterator(input_iterator);
+      input_iterator=DestroyPixelIterator(input_iterator);
       ClearMagickWand(magick_wand);
 
       image++;
@@ -125,19 +134,12 @@ int main(int argc, char **argv ) {
     exit(1);
   }
 
-
-  // initialize the output array
-  uint8_t output[200][200][3];
-
   // calculate histograms
 
   for (j = 0; j < height; j++) {
     for (k = 0; k < width; k++) {
 
-
       uint8_t histr[256] = { 0 }, histg[256] = { 0 }, histb[256] = { 0 };
-
-        //printf("height %d width %d image %d %hhu %hhu %hhu \n", j, k, i, array[i][j][k][0], array[i][j][k][1], array[i][j][k][2]);
       for (i = 0; i < nImages; i++) {
         histr[array[i][j][k][0]] += 1;
         histg[array[i][j][k][1]] += 1;
@@ -153,36 +155,29 @@ int main(int argc, char **argv ) {
     }
   }
 
-  MagickWand *m_wand = NULL;
-  PixelWand *p_wand = NULL;
-  iterator = NULL;
-  *pixels = NULL;
-
-  p_wand = NewPixelWand();
-  PixelSetColor(p_wand,"white");
-  m_wand = NewMagickWand();
-
-  MagickNewImage(m_wand,width,height,p_wand);
+  pixels = NewPixelWand();
+  p_out = NewPixelWand();
+  PixelSetColor(p_out,"white");
 
-  iterator=NewPixelIterator(m_wand);
+  output_wand = NewMagickWand();
+  MagickNewImage(output_wand,width,height,p_out);
 
+  output_iterator=NewPixelIterator(output_wand);
   for(x=0;x<height;x++) {
 
-    pixels=PixelGetNextIteratorRow(iterator,&y);
+    pixels=PixelGetNextIteratorRow(output_iterator,&y);
 
     for(y=0;y<width;y++) {
-
       sprintf(rgb, "rgb(%d,%d,%d)", output[x][y][0], output[x][y][1], output[x][y][2]);
       printf("write (%d,%d), %s \n", x ,y, rgb);
-      PixelSetColor(pixels[y],rgb); // this segfaults
+      PixelSetColor(pixels[y],rgb); 
     }
-
-    PixelSyncIterator(iterator);
+    PixelSyncIterator(output_iterator);
   }
 
-  iterator=DestroyPixelIterator(iterator);
-  MagickWriteImage(m_wand,"output.png");
-  DestroyMagickWand(m_wand);
+  output_iterator=DestroyPixelIterator(output_iterator);
+  MagickWriteImage(output_wand,"output.png");
+  DestroyMagickWand(output_wand);
 
   MagickWandTerminus();
 
-- 
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