1 files changed, 178 insertions, 0 deletions
diff --git a/src/libs/dimg/loaders/ppmloader.cpp b/src/libs/dimg/loaders/ppmloader.cpp
new file mode 100644
index 00000000..15c19423
--- /dev/null
+++ b/src/libs/dimg/loaders/ppmloader.cpp
@@ -0,0 +1,178 @@
+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2005-21-11
+ * Description : A 16 bits/color/pixel PPM IO file for 
+ *               DImg framework
+ * 
+ * Copyright (C) 2005 by Renchi Raju <renchi@pooh.tam.uiuc.edu>
+ * Copyright (C) 2005-2007 by Gilles Caulier <caulier dot gilles at gmail dot com> 
+ *
+ * This program is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU General
+ * Public License as published by the Free Software Foundation;
+ * either version 2, or (at your option)
+ * any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * ============================================================ */
+
+// This line must be commented to prevent any latency time
+// when we use threaded image loader interface for each image
+// files io. Uncomment this line only for debugging.
+//#define ENABLE_DEBUG_MESSAGES 
+
+// C ansi includes.
+
+extern "C" 
+{
+#include <unistd.h>
+}
+
+// C++ includes.
+
+#include <cstdio>
+#include <cmath>
+
+// TQt includes.
+
+#include <tqfile.h>
+#include <tqimage.h>
+
+// Local includes.
+
+#include "ddebug.h"
+#include "dimg.h"
+#include "dimgloaderobserver.h"
+#include "ppmloader.h"
+
+namespace Digikam
+{
+
+PPMLoader::PPMLoader(DImg* image)
+         : DImgLoader(image)
+{
+}
+
+bool PPMLoader::load(const TQString& filePath, DImgLoaderObserver *observer)
+{
+    //TODO: progress information
+    int	 width, height, rgbmax;
+    char nl;
+    
+    FILE *file = fopen(TQFile::encodeName(filePath), "rb");
+    if (!file)
+    {
+        DDebug() << k_funcinfo << "Cannot open image file." << endl;
+        return false;
+    }
+
+    ushort header;
+
+    if (fread(&header, 2, 1, file) != 1)
+    {
+        DDebug() << k_funcinfo << "Cannot read header of file." << endl;
+        fclose(file);
+        return false;
+    }
+
+    uchar* c = (uchar*) &header;
+    if (*c != 'P')
+    {
+        DDebug() << k_funcinfo << "Not a PPM file." << endl;
+        fclose(file);
+        return false;
+    }
+
+    c++;
+    if (*c != '6')
+    {
+        DDebug() << k_funcinfo << "Not a PPM file." << endl;
+        fclose(file);
+        return false;
+    }
+
+    rewind(file);
+    
+    if (fscanf (file, "P6 %d %d %d%c", &width, &height, &rgbmax, &nl) != 4) 
+    {
+        DDebug() << "Corrupted PPM file." << endl;
+        pclose (file);
+        return false;
+    }
+    
+    if (rgbmax <= 255)
+    {
+        DDebug() << k_funcinfo << "Not a 16 bits per color per pixel PPM file." << endl;
+        pclose (file);
+        return false;
+    }
+    
+    if (observer)
+        observer->progressInfo(m_image, 0.1);
+
+    unsigned short *data;
+    
+    data = new unsigned short[width*height*4];
+    unsigned short *dst  = data;
+    uchar src[6];
+    float fac = 65535.0 / rgbmax;
+    int checkpoint = 0;
+
+#ifdef ENABLE_DEBUG_MESSAGES
+    DDebug() << "rgbmax=" << rgbmax << "  fac=" << fac << endl;
+#endif
+
+    for (int h = 0; h < height; h++)
+    {
+
+        if (observer && h == checkpoint)
+        {
+            checkpoint += granularity(observer, height, 0.9);
+            if (!observer->continueQuery(m_image))
+            {
+                delete [] data;
+                pclose( file );
+                return false;
+            }
+            observer->progressInfo(m_image, 0.1 + (0.9 * ( ((float)h)/((float)height) )));
+        }
+
+        for (int w = 0; w < width; w++)
+        {
+
+            fread (src, 6 *sizeof(unsigned char), 1, file);
+
+            dst[0] = (unsigned short)((src[4]*256 + src[5]) * fac);      // Blue
+            dst[1] = (unsigned short)((src[2]*256 + src[3]) * fac);      // Green
+            dst[2] = (unsigned short)((src[0]*256 + src[1]) * fac);      // Red
+            dst[3] = 0xFFFF;
+
+            dst += 4;
+        }
+    }
+
+    fclose( file );
+
+    //----------------------------------------------------------
+
+    imageWidth()  = width;
+    imageHeight() = height;
+    imageData()   = (uchar*)data;
+    imageSetAttribute("format", "PPM");
+    
+    return true;
+}
+
+bool PPMLoader::save(const TQString& /*filePath*/, DImgLoaderObserver */*observer*/)
+{
+    return false;
+}
+
+}  // NameSpace Digikam