C++ (Cpp) colorFromPremultipliedARGB示例

示例#1

文件： ImageCairo.cpp 项目： sanyaade-mobiledev/Webkit-Projects

void BitmapImage::checkForSolidColor()
{
    m_isSolidColor = false;
    m_checkedForSolidColor = true;

    if (frameCount() > 1)
        return;

    cairo_surface_t* frameSurface = frameAtIndex(0);
    if (!frameSurface)
        return;

    ASSERT(cairo_surface_get_type(frameSurface) == CAIRO_SURFACE_TYPE_IMAGE);

    int width = cairo_image_surface_get_width(frameSurface);
    int height = cairo_image_surface_get_height(frameSurface);

    if (width != 1 || height != 1)
        return;

    unsigned* pixelColor = reinterpret_cast<unsigned*>(cairo_image_surface_get_data(frameSurface));
    m_solidColor = colorFromPremultipliedARGB(*pixelColor);

    m_isSolidColor = true;
}

示例#2

文件： BitmapImageCairo.cpp 项目： clbr/webkitfltk

void BitmapImage::checkForSolidColor()
{
    m_isSolidColor = false;
    m_checkedForSolidColor = true;

    if (frameCount() > 1)
        return;

    RefPtr<cairo_surface_t> surface = frameAtIndex(m_currentFrame);
    if (!surface) // If it's too early we won't have an image yet.
        return;

    if (cairo_surface_get_type(surface.get()) != CAIRO_SURFACE_TYPE_IMAGE)
        return;

    IntSize size = cairoSurfaceSize(surface.get());

    if (size.width() != 1 || size.height() != 1)
        return;

    unsigned* pixelColor = reinterpret_cast_ptr<unsigned*>(cairo_image_surface_get_data(surface.get()));
    m_solidColor = colorFromPremultipliedARGB(*pixelColor);

    m_isSolidColor = true;
}

示例#3

文件： BitmapImageCairo.cpp 项目： Moondee/Artemis

void BitmapImage::checkForSolidColor()
{
    m_isSolidColor = false;
    m_checkedForSolidColor = true;

    if (frameCount() > 1)
        return;

    NativeImageCairo* nativeImage = frameAtIndex(m_currentFrame);
    if (!nativeImage) // If it's too early we won't have an image yet.
        return;

    cairo_surface_t* surface = nativeImage->surface();
    ASSERT(cairo_surface_get_type(surface) == CAIRO_SURFACE_TYPE_IMAGE);

    int width = cairo_image_surface_get_width(surface);
    int height = cairo_image_surface_get_height(surface);

    if (width != 1 || height != 1)
        return;

    unsigned* pixelColor = reinterpret_cast<unsigned*>(cairo_image_surface_get_data(surface));
    m_solidColor = colorFromPremultipliedARGB(*pixelColor);

    m_isSolidColor = true;
}

示例#4

文件： ImageBufferCairo.cpp 项目： dzip/webkit

PassRefPtr<ImageData> getImageData(const IntRect& rect, const ImageBufferData& data, const IntSize& size)
{
    ASSERT(cairo_surface_get_type(data.m_surface) == CAIRO_SURFACE_TYPE_IMAGE);

    PassRefPtr<ImageData> result = ImageData::create(rect.width(), rect.height());
    unsigned char* dataSrc = cairo_image_surface_get_data(data.m_surface);
    unsigned char* dataDst = result->data()->data()->data();

    if (rect.x() < 0 || rect.y() < 0 || (rect.x() + rect.width()) > size.width() || (rect.y() + rect.height()) > size.height())
        memset(dataDst, 0, result->data()->length());

    int originx = rect.x();
    int destx = 0;
    if (originx < 0) {
        destx = -originx;
        originx = 0;
    }
    int endx = rect.x() + rect.width();
    if (endx > size.width())
        endx = size.width();
    int numColumns = endx - originx;

    int originy = rect.y();
    int desty = 0;
    if (originy < 0) {
        desty = -originy;
        originy = 0;
    }
    int endy = rect.y() + rect.height();
    if (endy > size.height())
        endy = size.height();
    int numRows = endy - originy;

    int stride = cairo_image_surface_get_stride(data.m_surface);
    unsigned destBytesPerRow = 4 * rect.width();

    unsigned char* destRows = dataDst + desty * destBytesPerRow + destx * 4;
    for (int y = 0; y < numRows; ++y) {
        unsigned* row = reinterpret_cast<unsigned*>(dataSrc + stride * (y + originy));
        for (int x = 0; x < numColumns; x++) {
            int basex = x * 4;
            unsigned* pixel = row + x + originx;
            Color pixelColor;
            if (multiplied == Unmultiplied)
                pixelColor = colorFromPremultipliedARGB(*pixel);
            else
                pixelColor = Color(*pixel);
            destRows[basex]     = pixelColor.red();
            destRows[basex + 1] = pixelColor.green();
            destRows[basex + 2] = pixelColor.blue();
            destRows[basex + 3] = pixelColor.alpha();
        }
        destRows += destBytesPerRow;
    }

    return result;
}

示例#5

文件： NativeImageCairo.cpp 项目： eocanha/webkit

Color nativeImageSinglePixelSolidColor(const NativeImagePtr& image)
{
    if (!image || nativeImageSize(image) != IntSize(1, 1))
        return Color();

    if (cairo_surface_get_type(image.get()) != CAIRO_SURFACE_TYPE_IMAGE)
        return Color();

    RGBA32* pixel = reinterpret_cast_ptr<RGBA32*>(cairo_image_surface_get_data(image.get()));
    return colorFromPremultipliedARGB(*pixel);
}

示例#6

文件： BitmapImageCairo.cpp 项目： Comcast/WebKitForWayland

Color singlePixelSolidColor(const RefPtr<cairo_surface_t>& image)
{
    ASSERT(image);
    
    if (NativeImage::size(image) != IntSize(1, 1))
        return Color();

    if (cairo_surface_get_type(image.get()) != CAIRO_SURFACE_TYPE_IMAGE)
        return Color();

    RGBA32* pixel = reinterpret_cast_ptr<RGBA32*>(cairo_image_surface_get_data(image.get()));
    return colorFromPremultipliedARGB(*pixel);
}

示例#7

文件： ImageCairo.cpp 项目： emuikernel/EAWebKit

void BitmapImage::checkForSolidColor()
{
    m_isSolidColor = false;
    m_checkedForSolidColor = true;

    if (frameCount() > 1)
        return;

    cairo_surface_t* frameSurface = frameAtIndex(0);
    if (!frameSurface)
        return;

//+EAWebKitChange
//5/30/2012
#if ENABLE(IMAGE_COMPRESSION)
    // Check if this is a compressed surface. 
    const void* pCompressedSurfaceUserData = cairo_surface_get_user_data (frameSurface, (cairo_user_data_key_t*) ImageCompressionGetUserDataKey());
#endif
//-EAWebKitChange


    ASSERT(cairo_surface_get_type(frameSurface) == CAIRO_SURFACE_TYPE_IMAGE);

    int width = cairo_image_surface_get_width(frameSurface);
    int height = cairo_image_surface_get_height(frameSurface);

    if (width != 1 || height != 1)
    {
    //+EAWebKitChange
    //5/30/2012
	#if ENABLE(IMAGE_COMPRESSION)
        if (pCompressedSurfaceUserData)
            cairo_surface_destroy(frameSurface);   
    #endif
     //-EAWebKitChange     
        return;
    }
    unsigned* pixelColor = reinterpret_cast<unsigned*>(cairo_image_surface_get_data(frameSurface));
    m_solidColor = colorFromPremultipliedARGB(*pixelColor);

    m_isSolidColor = true;

//+EAWebKitChange
//5/30/2012
#if ENABLE(IMAGE_COMPRESSION)
    if (pCompressedSurfaceUserData)
        cairo_surface_destroy(frameSurface);
#endif
//-EAWebKitChange     
}

示例#8

文件： ImageBufferCairo.cpp 项目： dzip/webkit

void ImageBuffer::platformTransformColorSpace(const Vector<int>& lookUpTable)
{
    ASSERT(cairo_surface_get_type(m_data.m_surface) == CAIRO_SURFACE_TYPE_IMAGE);

    unsigned char* dataSrc = cairo_image_surface_get_data(m_data.m_surface);
    int stride = cairo_image_surface_get_stride(m_data.m_surface);
    for (int y = 0; y < m_size.height(); ++y) {
        unsigned* row = reinterpret_cast<unsigned*>(dataSrc + stride * y);
        for (int x = 0; x < m_size.width(); x++) {
            unsigned* pixel = row + x;
            Color pixelColor = colorFromPremultipliedARGB(*pixel);
            pixelColor = Color(lookUpTable[pixelColor.red()],
                               lookUpTable[pixelColor.green()],
                               lookUpTable[pixelColor.blue()],
                               lookUpTable[pixelColor.alpha()]);
            *pixel = premultipliedARGBFromColor(pixelColor);
        }
    }
}