From 5a422aba704c375a307a902bafe658342e209906 Mon Sep 17 00:00:00 2001
From: scuri <scuri>
Date: Fri, 17 Oct 2008 06:10:15 +0000
Subject: First commit - moving from LuaForge to SourceForge

---
 src/process/im_effects.cpp | 86 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 src/process/im_effects.cpp

(limited to 'src/process/im_effects.cpp')

diff --git a/src/process/im_effects.cpp b/src/process/im_effects.cpp
new file mode 100644
index 0000000..7f65ce6
--- /dev/null
+++ b/src/process/im_effects.cpp
@@ -0,0 +1,86 @@
+/** \file
+ * \brief Effects
+ *
+ * See Copyright Notice in im_lib.h
+ * $Id: im_effects.cpp,v 1.1 2008/10/17 06:16:33 scuri Exp $
+ */
+
+
+#include <im.h>
+#include <im_util.h>
+#include <im_math.h>
+#include <im_complex.h>
+
+#include "im_process_pon.h"
+#include "im_math_op.h"
+
+#include <stdlib.h>
+#include <memory.h>
+
+static unsigned char BoxMean(imbyte *map, int offset, int shift, int hbox_size, int vbox_size)
+{
+  map += offset;
+  int acum = 0;
+  for (int i = 0; i < vbox_size; i++)
+  {
+    for (int j = 0; j < hbox_size; j++)
+    {
+      acum += *map++;
+    }
+
+    map += shift;
+  }
+
+  return (unsigned char)(acum / (vbox_size*hbox_size));
+}
+
+static void BoxSet(imbyte *map, int offset, int shift, int hbox_size, int vbox_size, unsigned char value)
+{
+  map += offset;
+  for (int i = 0; i < vbox_size; i++)
+  {
+    for (int j = 0; j < hbox_size; j++)
+    {
+      *map++ = value;
+    }
+
+    map += shift;
+  }
+}
+
+void imProcessPixelate(const imImage* src_image, imImage* dst_image, int box_size)
+{
+  int hbox = ((src_image->width + box_size-1)/ box_size);
+  int vbox = ((src_image->height + box_size-1)/ box_size);
+
+  for (int i = 0; i < src_image->depth; i++)
+  {
+    imbyte *src_map=(imbyte*)src_image->data[i];
+    imbyte *dst_map=(imbyte*)dst_image->data[i];
+    int vbox_size = box_size;
+
+    for (int bv = 0; bv < vbox; bv++)
+    {
+      int bv_pos = bv*box_size;
+      if (bv == vbox-1) vbox_size = src_image->height - bv_pos;
+      int hbox_size = box_size;
+
+      for (int bh = 0; bh < hbox; bh++)
+      {
+        int bh_pos = bh*box_size;
+        if (bh == hbox-1) hbox_size = src_image->width - bh_pos;
+        int offset = bv_pos*src_image->width + bh_pos;
+        int shift = src_image->width - hbox_size;
+        unsigned char mean = BoxMean(src_map, offset, shift, hbox_size, vbox_size);
+        BoxSet(dst_map, offset, shift, hbox_size, vbox_size, mean);
+      }
+    }
+  }
+}
+
+void imProcessPosterize(const imImage* src_image, imImage* dst_image, int level)
+{
+  unsigned char mask = (unsigned char)(0xFF << level);
+  imProcessBitMask(src_image, dst_image, mask, IM_BIT_AND);
+}
+
-- 
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