1 files changed, 98 insertions, 32 deletions

diff --git a/main.c b/main.c
index d353fbf..19ac6d6 100644
--- a/main.c
+++ b/main.c
@@ -19,15 +19,10 @@
 #define BI_CLR_USED       0x2e
 #define BI_CLR_IMPORTANT  0x32
 
-#define CHAR_SIZE 10 //How many pixels should form one ASCII char?
+#define CHAR_SIZE_X 20 //How many pixels should form one ASCII char?
+#define CHAR_SIZE_Y (2 * CHAR_SIZE_X)
 
-const char map[] = {' ', '.', ',', '-', ':', ';', '!', '/','?' , '%', '$', '#'};
-
-struct ascii_pixel
-{
-  char i[3 * CHAR_SIZE][CHAR_SIZE]; //
-  char c;
-};
+const char map[] = {' ', '.', ',', '-', '~', ':', ';', '!', '/','?' , '%', '$', '#'};
 
 //Routine for flipping bytes
 uint32_t flip(unsigned char* _v, int _c);
@@ -35,29 +30,33 @@ uint32_t flip(unsigned char* _v, int _c);
 //Calculate average
 char avg(int argc, char *argv);
 
+//Select Char based on 1B brightness Value
+char calc_char(uint8_t _c);
+
 int main(int argc, char *argv[])
 {
   unsigned char fileheader[_HEADER_SIZE];
   unsigned char *tables;
-  uint32_t **bitmap_buff;
-  uint32_t read_counter = 0;
-
-  uint16_t bfType = 0;
-  uint32_t bfSize = 0;
-  uint32_t bfOffBits = 0;
-
-  uint32_t biSize = 0;
-  int32_t  biWidth = 0;
-  int32_t  biHeight = 0;
-  uint16_t biBitCount = 0;
-  uint32_t biCompression = 0;
-  uint32_t biSizeImage = 0;
-  uint32_t biClrUsed = 0;
+  uint32_t      **bitmap_buff;
+  char          **ascii_buff;
+  uint32_t      read_counter = 0;
+
+  uint16_t bfType         = 0;
+  uint32_t bfSize         = 0;
+  uint32_t bfOffBits      = 0;
+
+  uint32_t biSize         = 0;
+  int32_t  biWidth        = 0;
+  int32_t  biHeight       = 0;
+  uint16_t biBitCount     = 0;
+  uint32_t biCompression  = 0;
+  uint32_t biSizeImage    = 0;
+  uint32_t biClrUsed      = 0;
   uint32_t biClrImportant = 0;
 
-  if(argc < 2)
+  if(argc != 3)
   {
-    printf("No input file specified. Abort.\n");
+    printf("Usage: %s <input> <output>\n", argv[0]);
     return 1;
   }
 
@@ -121,11 +120,11 @@ int main(int argc, char *argv[])
   uint32_t d = bfOffBits - read_counter;
   tables = malloc(sizeof(char)* d);
   fread(tables, sizeof(char), d, bitmap);
-
   read_counter += d;
   printf("Read to %x\n", read_counter);
 
-  uint32_t row_size = biWidth * 3; //One pixel is 3Byte, One line is multiple of 4Bytes
+  //One pixel is 3Byte, One line is multiple of 4Bytes
+  uint32_t row_size = biWidth * 3;
   while(row_size%4)
     row_size++;
 
@@ -133,21 +132,82 @@ int main(int argc, char *argv[])
   //If biHeight > 0 Data starts with last row!!
 
   //Allocate 2D array
-  bitmap_buff = malloc(sizeof(*bitmap_buff) * biWidth);
-  for(int i = 0; i < biWidth; i++)
+  bitmap_buff = malloc(sizeof(*bitmap_buff) * biHeight);
+  for(int i = 0; i < biHeight; i++)
+  {
+    bitmap_buff[i] = malloc(sizeof(*bitmap_buff[i]) * biWidth);
+  }
+
+  //Copy Bitmap
+  for(int row = 0; row < biHeight; row++)
   {
-    bitmap_buff[i] = malloc(sizeof(*bitmap_buff[i]) * biHeight);
+    //printf("Row %i\n", row);
+    fread(bitmap_buff[row], sizeof(char), row_size, bitmap);
+    read_counter += row_size;
   }
 
+  printf("Finished copying Bitmap\n");
 
-  for(int i = 0; i < biWidth; i++)
-    free(bitmap_buff[i]);
+  //Calculate Averages of CHAR_SIZE x CHAR_SIZE blocks
+  unsigned int size_x,size_y;
+  size_x = biWidth  / CHAR_SIZE_X;
+  size_y = biHeight / CHAR_SIZE_Y;
+
+  printf("Creating ASCII File %u x %u\n", size_x, size_y);
+
+  ascii_buff = malloc(sizeof(*ascii_buff) * size_x);
+  for (int i = 0; i < size_x; i++)
+  {
+    ascii_buff[i] = malloc(sizeof(ascii_buff[i]) * size_y);
+  }
+
+  //Nest thine Lööps
+  for(int x = 0; x < size_x; x++)
+  {
+    for(int y = 0; y < size_y; y++)
+    {
+      char b = 0;
+
+
+      for(int row = y * CHAR_SIZE_Y; row < (y + 1) * CHAR_SIZE_Y; row ++)
+      {
+        //x * CHAR_SIZE_X
+        char d[2] = {avg(CHAR_SIZE_X, ascii_buff[y]), b};
+        b = avg(2, d);
+      }
+      ascii_buff[x][y] = calc_char(b);
+    }
+  }
+
+  //Write Output
+  printf("Opening %s for writing.\n", argv[2]);
+  FILE *out = fopen(argv[2], "w");
+  if(!out)
+  {
+    printf("Error opening output File. Check writing permissions.\n");
+    return 1;
+  }
+
+  for(int y = size_y; y >= 0; y--)
+  {
+    for(int x = 0; x < size_x; x++)
+    {
+      fputc(ascii_buff[x][y], out);
+    }
+    fputc('\n', out);
+  }
+
+  //Cleanup
+  for(int i = 0; i < biHeight; i++)
+    free (bitmap_buff[i]);
   free(bitmap_buff);
 
   fclose(bitmap);
+  fclose(out);
+
   return 0;
 }
-
+//One pixel is 3Byte, One line is multiple of 4Bytes
 uint32_t flip(unsigned char* _v, int _c)
 {
   uint32_t ret = 0;
@@ -174,3 +234,9 @@ char avg(int argc, char *argv)
 
   return ret;
 }//flip
+
+char calc_char(uint8_t _c)
+{
+  float c = (float)_c / 255.0;
+  return map [(int)(sizeof(map) * c)];
+}