1 files changed, 121 insertions, 0 deletions
diff --git a/src/im_convertbitmap.cpp b/src/im_convertbitmap.cpp
new file mode 100644
index 0000000..c9570d7
--- /dev/null
+++ b/src/im_convertbitmap.cpp
@@ -0,0 +1,121 @@
+/** \file
+ * \brief Image Conversion
+ *
+ * See Copyright Notice in im_lib.h
+ * $Id: im_convertbitmap.cpp,v 1.1 2008/10/17 06:10:16 scuri Exp $
+ */
+
+#include "im.h"
+#include "im_util.h"
+#include "im_complex.h"
+#include "im_image.h"
+#include "im_convert.h"
+#include "im_counter.h"
+
+#include <stdlib.h>
+#include <assert.h>
+#include <memory.h>
+
+int imConvertToBitmap(const imImage* src_image, imImage* dst_image, int cpx2real, float gamma, int abssolute, int cast_mode)
+{
+  assert(src_image);
+  assert(dst_image);
+
+  if (!imImageMatchSize(src_image, dst_image) || !imImageIsBitmap(dst_image))
+    return IM_ERR_DATA;
+
+  int counter = imCounterBegin("Building Bitmap");
+
+  int ret;
+  if (src_image->data_type == IM_BYTE)
+  {
+    // NO data type conversion, only color mode conversion
+    ret = imConvertColorSpace(src_image, dst_image);
+  }
+  else
+  {
+    if (src_image->color_space == IM_RGB || 
+        src_image->color_space == IM_GRAY)
+    {
+      // data type conversion, but NO color mode conversion
+      ret = imConvertDataType(src_image, dst_image, cpx2real, gamma, abssolute, cast_mode);
+    }
+    else
+    {
+      // data type conversion AND color mode conversion
+      imImage* temp_image = imImageCreate(src_image->width, src_image->height, dst_image->color_space, src_image->data_type);
+      if (!temp_image)
+        ret = IM_ERR_MEM;
+      else
+      {
+        // first convert color_mode in the bigger precision
+        ret = imConvertColorSpace(src_image, temp_image);
+        if (ret == IM_ERR_NONE)
+        {
+          // second just convert data type
+          ret = imConvertDataType(temp_image, dst_image, cpx2real, gamma, abssolute, cast_mode);
+        }
+        imImageDestroy(temp_image);
+      }
+    }
+  }
+
+  imCounterEnd(counter);
+  return ret;
+}
+
+
+template <class T>
+void iDoChangePacking(const T* src_data, T* dst_data, int width, int height, int depth, 
+                             int src_is_packed)
+{
+  int count = width*height;
+  if (src_is_packed)
+  {
+    for (int i = 0; i < count; i++)
+    {
+      for (int d = 0; d < depth; d++)
+      {
+        *(dst_data + d*count) = *src_data++;
+      }
+
+      dst_data++;
+    }
+  }
+  else
+  {
+    for (int i = 0; i < count; i++)
+    {
+      for (int d = 0; d < depth; d++)
+      {
+        *dst_data++ = *(src_data + d*count);
+      }
+
+      src_data++;
+    }
+  }
+}
+
+void imConvertPacking(const void* src_data, void* dst_data, int width, int height, int depth, 
+                      int data_type, int src_is_packed)
+{
+  switch(data_type)
+  {
+  case IM_BYTE:
+    iDoChangePacking((const imbyte*)src_data, (imbyte*)dst_data, width, height, depth, src_is_packed); 
+    break;
+  case IM_USHORT:
+    iDoChangePacking((const imushort*)src_data, (imushort*)dst_data, width, height, depth, src_is_packed); 
+    break;
+  case IM_INT:
+    iDoChangePacking((const int*)src_data, (int*)dst_data, width, height, depth, src_is_packed); 
+    break;
+  case IM_FLOAT:
+    iDoChangePacking((const float*)src_data, (float*)dst_data, width, height, depth, src_is_packed); 
+    break;
+  case IM_CFLOAT:
+    iDoChangePacking((const imcfloat*)src_data, (imcfloat*)dst_data, width, height, depth, src_is_packed); 
+    break;
+  }
+}
+