--- joko/Uni/BSArch/04/bmp_fractal.c	2006/07/01 11:45:35	1.3
+++ joko/Uni/BSArch/04/bmp_fractal.c	2006/07/01 12:19:46	1.5
@@ -5,7 +5,7 @@
  * Uebung 4.4 
  */
 
-// $Id: bmp_fractal.c,v 1.3 2006/07/01 11:45:35 joko Exp $
+// $Id: bmp_fractal.c,v 1.5 2006/07/01 12:19:46 joko Exp $
 
 #include <windows.h>
 #include <stdio.h>
@@ -95,23 +95,24 @@
 
 
 int main(int argc, char *argv[]) {
-  int len,x,y;
-  char bgr[3];
-  short svalue;
-  int lvalue;
 
+  // MMF support
+  DWORD err;
   HANDLE hMap, hFile;
-  DWORD err, size;
-  int elems;
-  
   LPVOID pData;
   unsigned char *pDataBitmap, *pDataBitmapCurrent;
+
+  // workers
+  unsigned int workers = 3;
+  unsigned int worker_index, worker_rows, worker_startrow;
   
-  int offset;
+  // fractal calculation
+  int x, y;
+  char bgr[3];
   
-  // create empty file (black background)
-  write_blank_file("test.bmp");
   
+  // create empty bmp-file (black background)
+  write_blank_file("test.bmp");
 
   /* open file for reading and writing */
   hFile = CreateFile("test.bmp", GENERIC_WRITE|GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
@@ -152,6 +153,21 @@
   }
   */
 
+  // calculate segments of bitmap for worker threads/processes
+  worker_rows = YSIZE / workers;
+  printf("rows for each worker: %i\n", worker_rows);
+  for (worker_index = 0; worker_index < workers; worker_index++) {
+    
+    // number of row to start for each worker
+    worker_startrow = worker_index * worker_rows;
+    
+    // recalculate number of rows for last worker if (YSIZE mod workers) != 0
+    if (worker_index == workers - 1) {
+      worker_rows = YSIZE - worker_startrow;
+      printf("rows for last worker: %i\n", worker_rows);
+    }
+  }
+
   // calculate fractal
   for (y=YSIZE-1; y>=0; y--) {
           for (x=0; x<XSIZE; x++) {
@@ -161,7 +177,6 @@
             //printf("pointer: %p\n", pDataBitmapCurrent);
             
             // transfer color values to current pixel
-            //*pDataBitmapCurrent = (unsigned char *)bgr;
             pDataBitmapCurrent[0] = bgr[0];
             pDataBitmapCurrent[1] = bgr[1];
             pDataBitmapCurrent[2] = bgr[2];