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49 // sets bit at (x, y) to 1
50 if (image.format() == QImage::Format_MonoLSB)
51 image.scanLine(y)[x >> 3] |= 1 << (x & 7);
53 image.scanLine(y)[x >> 3] |= 1 << (7 - (x & 7));
59 // set entry 19 in the color table to yellow
60 image.setColor(19, qRgb(255, 255, 0));
62 // set 8 bit pixel at (x,y) to value yellow (in color table)
63 image.scanLine(y)[x] = 19;
69 // sets 32 bit pixel at (x,y) to yellow.
70 uint *ptr = reinterpret_cast<uint *>(image.scanLine(y)) + x;
71 *ptr = qRgb(255, 255, 0);
80 buffer.open(QIODevice::WriteOnly);
81 image.save(&buffer, "PNG"); // writes image into ba in PNG format
90 QBuffer buffer(&bytes);
91 buffer.open(QIODevice::WriteOnly);
92 pixmap.save(&buffer, "PNG"); // writes pixmap into bytes in PNG format
99 QPixmap alpha("image-with-alpha.png");
100 QPixmap alphacopy = alpha;
101 alphacopy.setMask(alphacopy.mask());