1 files changed, 239 insertions, 0 deletions

diff --git a/noncore/multimedia/camera2/image.cpp b/noncore/multimedia/camera2/image.cpp
new file mode 100644
index 0000000..39b6d8b
--- a/dev/null
+++ b/noncore/multimedia/camera2/image.cpp
@@ -0,0 +1,239 @@
+/**********************************************************************
+** Copyright (C) 2000-2006 Trolltech AS.  All rights reserved.
+**
+** This file is part of the Qtopia Environment.
+** 
+** 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 of the License, or (at your
+** option) any later version.
+** 
+** A copy of the GNU GPL license version 2 is included in this package as 
+** LICENSE.GPL.
+**
+** 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.
+**
+** In addition, as a special exception Trolltech gives permission to link
+** the code of this program with Qtopia applications copyrighted, developed
+** and distributed by Trolltech under the terms of the Qtopia Personal Use
+** License Agreement. You must comply with the GNU General Public License
+** in all respects for all of the code used other than the applications
+** licensed under the Qtopia Personal Use License Agreement. If you modify
+** this file, you may extend this exception to your version of the file,
+** but you are not obligated to do so. If you do not wish to do so, delete
+** this exception statement from your version.
+** 
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+#include "image.h"
+
+#include <qfileinfo.h>
+#include <qimage.h>
+#include <qstring.h>
+
+/*!
+   Returns an image created by loading the \a filename,
+   and scalining it, preserving aspect ratio, to fit in
+   \a width by \a height pixels.
+
+   First availability: Qtopia 2.0
+*/
+QImage Image::loadScaled(const QString & filename, const int width, const int height,
+                         ScaleMode mode)
+{
+    QImageIO iio;
+    QString param;
+    int w = width;
+    int h = height;
+
+    if (width == 0 || height == 0)
+        return QImage();
+
+    iio.setFileName(filename);
+
+    //
+    // Try and load and scale the image in one hit.
+    //
+    param.sprintf("GetHeaderInformation");
+    iio.setParameters(param);
+    iio.read();
+
+    //
+    // If we don't have bits(), read() understands parameters,
+    // and we can setup for fast reading.  Otherwise, take the
+    // performance hit and do things slowly.
+    //
+    if (!iio.image().bits()) {
+        if ((iio.image().width() < w) && (iio.image().height() < h)) {
+            param.sprintf("%s", "Fast");        // No Tr
+        }
+        else {
+            int shrink_factor = 1;
+            QString smode;
+            switch (mode) {
+            case ScaleMin:
+                smode = "ScaleMin";
+                shrink_factor = QMAX(iio.image().width() / w, iio.image().height() / h);
+                break;
+            case ScaleMax:
+                smode = "ScaleMax";
+                shrink_factor = QMIN(iio.image().width() / w, iio.image().height() / h);
+                break;
+            case ScaleFree:
+                smode = "ScaleFree";
+                shrink_factor = QMIN(iio.image().width() / w, iio.image().height() / h);
+                break;
+            }
+            param.sprintf("Scale( %i, %i, %s )%s, Shrink( %i )",        // No tr
+                          w, h, smode.latin1(), ", Fast", shrink_factor);       // No tr
+        }
+
+        iio.setParameters(param);
+        iio.read();
+        return iio.image();
+    }
+
+    if ((iio.image().width() > w) || (iio.image().height() > h)) {
+        QSize s = aspectScaleSize(iio.image().width(), iio.image().height(), w, h, mode);
+        return iio.image().smoothScale(s.width(), s.height());
+    }
+
+    return iio.image();
+}
+
+//
+// Returns new size of image, scaled to target_width and target_height,
+// whilst preserving aspect ratio.  Useful when it's not possible to
+// scale an image prior to using it (eg. using RichText).  Should be in
+// global image utils.
+//
+// NOTE
+// - expensive for images whose drivers do not allow us to retrieve
+//   parameters without reading the entire image.  Currently (20030930)
+//   only the jpeg driver allows parameter reading.
+//
+QSize Image::loadScaledImageSize(const QString & filename, int target_width, int target_height,
+                                 int maxscale, ScaleMode mode)
+{
+    QImageIO iio;
+    iio.setFileName(filename);
+    iio.setParameters("GetHeaderInformation");
+    iio.read();
+
+    int w = iio.image().width();
+    int h = iio.image().height();
+
+    //
+    // Scaling up small pictures can be very ugly.
+    // Leave them alone if they are too small.
+    //
+    if (maxscale && w * maxscale < target_width && h * maxscale < target_height)
+        return QSize(w * maxscale, h * maxscale);
+
+    return aspectScaleSize(w, h, target_width, target_height, mode);
+}
+
+// Load an image to be used as a portrait. Force its height to height, 
+// scale width to new height, and crop the width if it's still > width
+// XXX : Should be using integer math
+QImage Image::loadPortrait(const QString & filename, const int width, const int height)
+{
+    QImageIO iio;
+    QString param;
+    int w = width;
+    int h = height;
+
+    if (width == 0 || height == 0)
+        return QImage();
+
+    iio.setFileName(filename);
+
+    //
+    // Try and load and scale the image in one hit.
+    //
+    param.sprintf("GetHeaderInformation");
+    iio.setParameters(param);
+    iio.read();
+
+    //
+    // If we don't have bits(), read() understands parameters,
+    // and we can setup for fast reading.  Otherwise, take the
+    // performance hit and do things slowly.
+    //
+    if (!iio.image().bits()) {
+
+        w = (int) ((double) iio.image().width() / (double) (iio.image().height()) *
+                   (double) height);
+        param.sprintf("Scale( %i, %i, ScaleFree )%s",   // No tr
+                      w, h, ", Fast");  // No tr
+
+        iio.setParameters(param);
+        iio.read();
+
+        if (w > width) {
+            int x = (int) ((double) (w - width) / 2);
+            QRect r(x, 0, width, height);
+            return iio.image().copy(r);
+        }
+        else
+            return iio.image();
+    }
+    else
+        //scale width to the new height
+        return sizeToPortrait(iio.image(), width, height);
+}
+
+QImage Image::sizeToPortrait(const QImage & image, const int width, const int height)
+{
+    int w = (image.width() * height) / image.height();
+    if (w > width) {
+        int x = (w - width) / 2;
+        QRect r(x, 0, width, height);
+        return image.smoothScale(w, height).copy(r);
+    }
+    else
+        return image.smoothScale(width, height);
+}
+
+//
+// Return (w x h) scaled to (target_width x target_height) with aspect
+// ratio preserved.
+//
+QSize
+    Image::aspectScaleSize(const int w, const int h, const int target_width,
+                           const int target_height, ScaleMode mode)
+{
+    QSize s;
+    if (mode == ScaleFree) {
+        s = QSize(target_width, target_height);
+    }
+    else {
+        bool useHeight = TRUE;
+        int rw = target_height * w / h;
+
+        if (mode == ScaleMin) {
+            useHeight = (rw <= target_width);
+        }
+        else {                  // mode == ScaleMax
+            useHeight = (rw >= target_width);
+        }
+
+        if (useHeight) {
+            s = QSize(rw, target_height);
+        }
+        else {
+            s = QSize(target_width, target_width * h / w);
+        }
+    }
+
+    return s;
+}
+