C++ (Cpp) transformedImage示例

示例#1

文件： bitmapimage.cpp 项目： meiavy/pencil-1

BitmapImage BitmapImage::transformed(QRect newBoundaries, bool smoothTransform)
{
    BitmapImage transformedImage(newBoundaries, QColor(0,0,0,0));
    QPainter painter(transformedImage.mImage);
    painter.setRenderHint(QPainter::SmoothPixmapTransform, smoothTransform);
    newBoundaries.moveTopLeft( QPoint(0,0) );
    painter.drawImage(newBoundaries, *mImage );
    painter.end();
    return transformedImage;
}

示例#2

文件： ImageBufferCG.cpp 项目： acss/owb-mirror

String ImageBuffer::toDataURL(const String& mimeType) const
{
    ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));

    RetainPtr<CGImageRef> image(AdoptCF, CGBitmapContextCreateImage(context()->platformContext()));
    if (!image)
        return "data:,";

    size_t width = CGImageGetWidth(image.get());
    size_t height = CGImageGetHeight(image.get());

    OwnArrayPtr<uint32_t> imageData(new uint32_t[width * height]);
    if (!imageData)
        return "data:,";
    
    RetainPtr<CGImageRef> transformedImage(AdoptCF, CGBitmapContextCreateImage(context()->platformContext()));
    if (!transformedImage)
        return "data:,";

    RetainPtr<CFMutableDataRef> transformedImageData(AdoptCF, CFDataCreateMutable(kCFAllocatorDefault, 0));
    if (!transformedImageData)
        return "data:,";

    RetainPtr<CGImageDestinationRef> imageDestination(AdoptCF, CGImageDestinationCreateWithData(transformedImageData.get(),
        utiFromMIMEType(mimeType).get(), 1, 0));
    if (!imageDestination)
        return "data:,";

    CGImageDestinationAddImage(imageDestination.get(), transformedImage.get(), 0);
    CGImageDestinationFinalize(imageDestination.get());

    Vector<char> in;
    in.append(CFDataGetBytePtr(transformedImageData.get()), CFDataGetLength(transformedImageData.get()));

    Vector<char> out;
    base64Encode(in, out);
    out.append('\0');

    return String::format("data:%s;base64,%s", mimeType.utf8().data(), out.data());
}

示例#3

文件： imagefunctor.cpp 项目： FlavioFalcao/Intro-Design-Patterns-Cpp-Qt5

void ImageFunctor::grabImage(int num) {
    QImage img = m_futureWatcher->resultAt(num);
    emit transformedImage(img);
}