Doc: compile image snippets

Done-with: Nico Vertriest <nico.vertriest@qt.io>
Task-number: 81486
Change-Id: I9860217a80cf94d27542d7e7836fe60fcd60897e
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/gui/doc/snippets/image/image.cpp

@@ -47,68 +47,38 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-
 #include <QtGui>
+namespace image {
+void wrapper0() {
 
-int main()
-{
-    int x, y;
-    {
-        // BIT ACCESS
-        QImage image;
-        // sets bit at (x, y) to 1
-        if (image.format() == QImage::Format_MonoLSB)
-            image.scanLine(y)[x >> 3] |= 1 << (x & 7);
-        else
-            image.scanLine(y)[x >> 3] |= 1 << (7 - (x & 7));
-    }
-
-    {
-        // 8-BIT ACCESS
-        QImage image;
-        // set entry 19 in the color table to yellow
-        image.setColor(19, qRgb(255, 255, 0));
-
-        // set 8 bit pixel at (x,y) to value yellow (in color table)
-        image.scanLine(y)[x] = 19;
-    }
-
-    {
-        // 32-BIT
-        QImage image;
-        // sets 32 bit pixel at (x,y) to yellow.
-        uint *ptr = reinterpret_cast<uint *>(image.scanLine(y)) + x;
-        *ptr = qRgb(255, 255, 0);
-    }
-
-    {
-        // SAVE
 //! [0]
-        QImage image;
-        QByteArray ba;
-        QBuffer buffer(&ba);
-        buffer.open(QIODevice::WriteOnly);
-        image.save(&buffer, "PNG"); // writes image into ba in PNG format
+QImage image;
+QByteArray ba;
+QBuffer buffer(&ba);
+buffer.open(QIODevice::WriteOnly);
+image.save(&buffer, "PNG"); // writes image into ba in PNG format
 //! [0]
-    }
 
-    {
-        // PIX SAVE
-//! [1]
-        QPixmap pixmap;
-        QByteArray bytes;
-        QBuffer buffer(&bytes);
-        buffer.open(QIODevice::WriteOnly);
-        pixmap.save(&buffer, "PNG"); // writes pixmap into bytes in PNG format
-//! [1]
-    }
+} // wrapper0
+
+
+void wrapper1() {
+
+//! [1]
+QPixmap pixmap;
+QByteArray bytes;
+QBuffer buffer(&bytes);
+buffer.open(QIODevice::WriteOnly);
+pixmap.save(&buffer, "PNG"); // writes pixmap into bytes in PNG format
+//! [1]
+
 
-    {
-        // MASK
 //! [2]
-        QPixmap alpha("image-with-alpha.png");
-        QPixmap alphacopy = alpha;
-        alphacopy.setMask(alphacopy.mask());
+QPixmap alpha("image-with-alpha.png");
+QPixmap alphacopy = alpha;
+alphacopy.setMask(alphacopy.mask());
 //! [2]
-    }
-}
+
+} // wrapper1
+
+} // image

src/gui/doc/snippets/image/image.pro

@@ -0,0 +1,8 @@
+TEMPLATE = lib
+TARGET = image_snippets
+QT += core gui widgets
+
+SOURCES = \
+    image.cpp \
+    supportedformat.cpp
+

src/gui/doc/snippets/image/supportedformat.cpp

@@ -50,13 +50,12 @@
 
 #include <QtGui>
 
-int main(int argv, char **args)
-{
+void wrapper() {
 //! [0]
     QImageWriter writer;
     writer.setFormat("png");
     if (writer.supportsOption(QImageIOHandler::Description))
         qDebug() << "Png supports embedded text";
 //! [0]
-    return 0;
-}
+
+} // wrapper

src/gui/doc/snippets/snippets.pro

@@ -10,6 +10,7 @@ contains(QT_BUILD_PARTS, tests) {
         droparea \
         dropevents \
         droprectangle \
+        image \
         qfontdatabase \
         textblock-formats \
         textblock-fragments \