本文整理汇总了C++中qRed函数的典型用法代码示例。如果您正苦于以下问题：C++ qRed函数的具体用法？C++ qRed怎么用？C++ qRed使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了qRed函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: RGB24Buffer
RGB24Buffer *QTFileLoader::RGB24BufferFromQImage(QImage *image)
{
if (image == NULL)
return NULL;
RGB24Buffer *result = new RGB24Buffer(image->height(), image->width(), false);
if (image->format() == QImage::Format_ARGB32 || image->format() == QImage::Format_RGB32 )
{
for (int i = 0; i < image->height(); i++)
{
uint8_t *in = (uint8_t *)image->scanLine(i);
RGBColor *out = &result->element(i, 0);
for (int j = 0; j < image->width(); j++)
{
uint8_t r = *(in++);
uint8_t g = *(in++);
uint8_t b = *(in++);
*out = RGBColor(b,g,r);
in++;
out++;
}
}
} else {
/**
* TODO: Make this faster using .bits() method.
* So far don't want to mess with possible image formats
*
*/
qDebug("QTFileLoader::RGB24BufferFromQImage():Slow conversion.");
for (int i = 0; i < image->height(); i++)
{
for (int j = 0; j < image->width(); j++)
{
QRgb pixel = image->pixel(j,i);
result->element(i,j) = RGBColor(qRed(pixel), qGreen(pixel), qBlue(pixel));
}
}
}
return result;
}示例2: for
void Histogram::generate(QImage* image)
{
int width = image->width();
int height = image->height();
if (image->format() == QImage::Format_Indexed8)
{
for (int x=0; x<width; x++)
{ for (int y=0; y<height; y++)
{
QRgb pixel = image->pixel(x, y);
int l = qGray(pixel);
int value = L-> value(l)+1;
L -> insert(l, value);
}
}
}
else
{
for (int x=0; x<width; x++)
{ for (int y=0; y<height; y++)
{
QRgb pixel = image->pixel(x, y);
int r = qRed(pixel);
int g = qGreen(pixel);
int b = qBlue(pixel);
int valueR = R-> value(r)+1;
int valueG = G-> value(g)+1;
int valueB = B-> value(b)+1;
R -> insert(r, valueR);
G -> insert(g, valueG);
B -> insert(b, valueB);
}
}
}
}示例3: fprintf
void SegmentListVIIRSDNB::printData(SegmentVIIRSDNB *segm, int linesfrom, int viewsfrom)
{
int yaaa = 0;
int xaaa = 0;
fprintf(stderr, "projectionCoordX \n");
for( int i = linesfrom + 0; i < linesfrom + 32; i++) //this->NbrOfLines - 1; i++)
{
for( int j = viewsfrom + 0; j < viewsfrom + 16; j++) //this->earth_views_per_scanline - 1 ; j++ )
{
fprintf(stderr, "%u, ", segm->getProjectionX(i,j));
}
fprintf(stderr, "\n");
}
fprintf(stderr, "projectionCoordY \n");
for( int i = linesfrom + 0; i < linesfrom + 32; i++) //this->NbrOfLines - 1; i++)
{
for( int j = viewsfrom + 0; j < viewsfrom + 16; j++) //this->earth_views_per_scanline - 1 ; j++ )
{
fprintf(stderr, "%u, ", segm->getProjectionY(i,j));
}
fprintf(stderr, "\n");
}
fprintf(stderr, "projectionCoordValues \n");
for( int i = linesfrom + 0; i < linesfrom + 32; i++) //this->NbrOfLines - 1; i++)
{
for( int j = viewsfrom + 0; j < viewsfrom + 16; j++) //this->earth_views_per_scanline - 1 ; j++ )
{
fprintf(stderr, "%u, ", qRed(segm->getProjectionValue(i,j)));
}
fprintf(stderr, "\n");
}
}示例4: fuzzyComparePixels
static bool fuzzyComparePixels(const QRgb testPixel, const QRgb refPixel, const char* file, int line, int x = -1, int y = -1)
{
static int maxFuzz = 1;
static bool maxFuzzSet = false;
// On 16 bpp systems, we need to allow for more fuzz:
if (!maxFuzzSet) {
maxFuzzSet = true;
if (QGuiApplication::primaryScreen()->depth() < 24)
maxFuzz = 32;
}
int redFuzz = qAbs(qRed(testPixel) - qRed(refPixel));
int greenFuzz = qAbs(qGreen(testPixel) - qGreen(refPixel));
int blueFuzz = qAbs(qBlue(testPixel) - qBlue(refPixel));
int alphaFuzz = qAbs(qAlpha(testPixel) - qAlpha(refPixel));
if (refPixel != 0 && testPixel == 0) {
QString msg;
if (x >= 0) {
msg = QString("Test pixel [%1, %2] is null (black) when it should be (%3,%4,%5,%6)")
.arg(x).arg(y)
.arg(qRed(refPixel)).arg(qGreen(refPixel)).arg(qBlue(refPixel)).arg(qAlpha(refPixel));
} else {
msg = QString("Test pixel is null (black) when it should be (%2,%3,%4,%5)")
.arg(qRed(refPixel)).arg(qGreen(refPixel)).arg(qBlue(refPixel)).arg(qAlpha(refPixel));
}
QTest::qFail(msg.toLatin1(), file, line);
return false;
}
if (redFuzz > maxFuzz || greenFuzz > maxFuzz || blueFuzz > maxFuzz || alphaFuzz > maxFuzz) {
QString msg;
if (x >= 0)
msg = QString("Pixel [%1,%2]: ").arg(x).arg(y);
else
msg = QString("Pixel ");
msg += QString("Max fuzz (%1) exceeded: (%2,%3,%4,%5) vs (%6,%7,%8,%9)")
.arg(maxFuzz)
.arg(qRed(testPixel)).arg(qGreen(testPixel)).arg(qBlue(testPixel)).arg(qAlpha(testPixel))
.arg(qRed(refPixel)).arg(qGreen(refPixel)).arg(qBlue(refPixel)).arg(qAlpha(refPixel));
QTest::qFail(msg.toLatin1(), file, line);
return false;
}
return true;
}示例5: qGreen
QPixmap Cell::fadedPixmap(const QPixmap & pixmap)
{
QImage image = pixmap.toImage();
for(int y = 0; y < image.height(); y++)
{
QRgb * line = (QRgb *)image.scanLine(y);
for(int x = 0; x < image.width(); x++)
{
QRgb pix = line[x];
if(qAlpha(pix) == 255)
{
int g = (255 + 3 * qGreen(pix)) / 4;
int b = (255 + 3 * qBlue(pix)) / 4;
int r = (255 + 3 * qRed(pix)) / 4;
line[x] = qRgb(r, g, b);
}
}
}
return QPixmap::fromImage(image);
}示例6: int
/**
* Changes the transparency (alpha component) of an image.
* @param image Image to be manipulated. Must be true color (8 bit per channel).
* @param factor > 1.0 == more transparency, < 1.0 == less transparency.
*/
void PlaylistItem::imageTransparency( QImage& image, float factor ) //static
{
uint *data = reinterpret_cast<unsigned int *>( image.bits() );
const int pixels = image.width() * image.height();
uint table[256];
register int c;
// Precalculate lookup table
for( int i = 0; i < 256; ++i ) {
c = int( double( i ) * factor );
if( c > 255 ) c = 255;
table[i] = c;
}
// Process all pixels. Highly optimized.
for( int i = 0; i < pixels; ++i ) {
c = data[i]; // Memory access is slow, so do it only once
data[i] = qRgba( qRed( c ), qGreen( c ), qBlue( c ), table[qAlpha( c )] );
}
}示例7: _binarize
static void _binarize(QString sourceFile, QString destFile)
{
QImage image(sourceFile);
int width = image.width();
int height = image.height();
QRgb color;
QRgb avg;
QRgb black = qRgb(0, 0, 0);
QRgb white = qRgb(255, 255, 255);
for(int i = 0; i < width; i++)
{
for(int j= 0; j < height; j++)
{
color = image.pixel(i, j);
avg = (qRed(color) + qGreen(color) + qBlue(color))/3;
image.setPixel(i, j, avg >= 128 ? white : black);
}
}
image.save(destFile);
}示例8: Matrix
/*!
Used to convert RGB Jpg files to grayscale.
\param image a QImage with original image data points
\return a grayscale Matrix from QImage
*/
Matrix ImageB::convertRGB2Gray( QImage image )
{
QRgb pix;
Matrix mat = Matrix(image.height(),image.width());
for (long i=1; i <= image.width();i++)
{
for(long j=1; j <= image.height();j++)
{
int h =0;
pix = image.pixel(i,j); //pega valor do pixel
//média dos pixels
h = int((qRed(pix) + qGreen(pix) + qBlue(pix))/3);
mat(j,i) = h; //seta dado na matriz
}
}
return mat;
}示例9: levelImage
//==============================================================================
void GameServer::LoadLevelFromImage_(const QString filename)
{
QFile levelImage(filename);
if (levelImage.exists())
{
QImage map;
map.load(filename, "png");
levelMap_.Resize(map.width(), map.height());
for (int i = 0; i < map.height(); i++)
{
for (int j = 0; j < map.width(); j++)
{
auto color = map.pixel(j, i);
int summ = qRed(color) + qGreen(color) + qBlue(color);
int value = summ > (255 * 3 / 2) ? '.' : '#';
levelMap_.SetCell(j, i, value);
}
}
}
}示例10: qRgba
void ImageHandler::ghostImage(QImage *img)
{
int w = img->width(),
h = img->height(),
x, y;
for (y=0; y<h; y++)
{
uint *line = (uint*)img->scanLine(y);
for (x=0; x<w; x++)
{
//if ((x%2 && !(y%2)) || (!(x%2) && y%2))
{
line[x] = qRgba(qRed(line[x]), qGreen(line[x]), qBlue(line[x]), (line[x] ? 125 : 0));
}
}
}
}示例11: QByteArray
QDBusArgument& operator<< (QDBusArgument &arg, const QImage &image)
{
if (image.isNull()) {
// Sometimes this gets called with a null QImage for no obvious reason.
arg.beginStructure();
arg << 0 << 0 << 0 << false << 0 << 0 << QByteArray();
arg.endStructure();
return arg;
}
QImage scaled = image.scaledToHeight(128, Qt::SmoothTransformation).convertToFormat(QImage::Format_ARGB32);
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
// ABGR -> ARGB
QImage i = scaled.rgbSwapped();
#else
// ABGR -> GBAR
QImage i(scaled.size(), scaled.format());
for (int y = 0; y < i.height(); ++y) {
QRgb *p = (QRgb*) scaled.scanLine(y);
QRgb *q = (QRgb*) i.scanLine(y);
QRgb *end = p + scaled.width();
while (p < end) {
*q = qRgba(qGreen(*p), qBlue(*p), qAlpha(*p), qRed(*p));
p++;
q++;
}
}
#endif
arg.beginStructure();
arg << i.width();
arg << i.height();
arg << i.bytesPerLine();
arg << i.hasAlphaChannel();
int channels = i.isGrayscale() ? 1 : (i.hasAlphaChannel() ? 4 : 3);
arg << i.depth() / channels;
arg << channels;
arg << QByteArray(reinterpret_cast<const char*>(i.bits()), i.byteCount());
arg.endStructure();
return arg;
}示例12: prepareSurface
static QImage prepareSurface(QImage img, int w, int h)
{
img = scaleImage(img, w, h);
// slightly larger, to accomodate for the reflection
int hs = h * 2;
int hofs = h / 3;
// offscreen buffer: black is sweet
QImage result(hs, w, QImage::Format_RGB32);
result.fill(0);
// transpose the image, this is to speed-up the rendering
// because we process one column at a time
// (and much better and faster to work row-wise, i.e in one scanline)
for(int x = 0; x < w; x++)
for(int y = 0; y < h; y++)
result.setPixel(hofs + y, x, img.pixel(x, y));
// create the reflection
int ht = hs - h - hofs;
int hte = ht;
for(int x = 0; x < w; x++)
for(int y = 0; y < ht; y++)
{
QRgb color = img.pixel(x, img.height()-y-1);
int a = qAlpha(color);
int r = qRed(color) * a / 256 * (hte - y) / hte * 3/5;
int g = qGreen(color) * a / 256 * (hte - y) / hte * 3/5;
int b = qBlue(color) * a / 256 * (hte - y) / hte * 3/5;
result.setPixel(h+hofs+y, x, qRgb(r, g, b));
}
#ifdef PICTUREFLOW_BILINEAR_FILTER
int hh = BILINEAR_STRETCH_VER*hs;
int ww = BILINEAR_STRETCH_HOR*w;
result = scaleImage(result, hh, ww);
#endif
return result;
}示例13: result
//This function makes a pixmap which is based on icon, but has a number painted on it.
QPixmap BoxContainerItem::calcComplexPixmap(const QPixmap &icon, const QColor &fgColour, const QFont *font, const int count)
{
QPixmap result(icon);
QPixmap numberPixmap(icon.size());
QImage iconImage(icon.convertToImage());
QImage numberImage;
QRgb *rgbline;
QPainter p;
//Make a transparent number; first make a white number on a black background.
//This pixmap also is the base alpha-channel, the foreground colour is added later.
numberPixmap.fill(Qt::black);
p.begin(&numberPixmap, false);
p.setPen(Qt::white);
if(font)
p.setFont(*font);
p.drawText(icon.rect(), Qt::AlignCenter, QString::number(count));
p.end();
//Convert to image and add the alpha channel.
numberImage = numberPixmap.convertToImage();
if(numberImage.depth() != 32) //Make sure depth is 32 (and thus can have an alpha channel)
numberImage = numberImage.convertDepth(32);
numberImage.setAlphaBuffer(true); //Enable alpha channel
for(int xx = 0; xx < numberImage.height(); ++xx)
{
rgbline = (QRgb *)numberImage.scanLine(xx);
for(int yy = 0; yy < numberImage.width(); ++yy)
{
//Set colour and alpha channel
rgbline[ yy ] = qRgba(fgColour.red(), fgColour.green(), fgColour.blue(), qRed(rgbline[ yy ]));
}
}
//Merge icon and number and convert to result.
KIconEffect::overlay(iconImage, numberImage);
result.convertFromImage(iconImage);
return result;
}示例14: clearMask
void QImageWidget::setImage(const char *filename)
{
image.load(filename);
//#ifdef USE_MAEMO
// unlink(filename);
//#endif
clearMask();
if(w > 0 && h > 0 && ( w < image.width() || h < image.height() ) )
{
//printf("set1: setImage %s xy=%d,%d w=%d h=%d width=%d height=%d\n", filename,
//x(), y(), w, h,
// image.width(),image.height());
image = image.scaled(w, h, Qt::KeepAspectRatio);
}
else if(w > image.width() || h > image.height())
{
//printf("set2: setImage %s xy=%d,%d w=%d h=%d width=%d height=%d\n", filename,
//x(),y(),w, h,
// image.width(),image.height());
//qt3 image = image.smoothScale(w,h,Qt::KeepAspectRatio);
image.scaled(w, h, Qt::KeepAspectRatio, Qt::SmoothTransformation);
}
if(strstr(filename,".bmp") != NULL || strstr(filename,".BMP") != NULL)
{ // it may be a bmp with transparent background
int n = image.numColors();
for(int icol=0; icol<n; icol++)
{
QRgb qcol = image.color(icol);
if(qRed(qcol) == 1 && qGreen(qcol) == 1 && qBlue(qcol) == 1)
{ // image has transparent background
//image.setAlphaBuffer(true);
image.setColor(icol,qRgba(1,1,1,0));
image.createAlphaMask();
}
}
}
perhapsSetMask();
original_image = image.copy();
repaint();
}示例15: PNM
PNM* ConversionGrayscale::transform()
{
// qDebug() << Q_FUNC_INFO << "Not implemented yet!";
int width = image->width();
int height = image->height();
PNM* newImage = new PNM(width, height, QImage::Format_Indexed8);
if (image->format() == QImage::Format_Mono)
{
for (int x = 0; x<width; x++)
for (int y = 0; y<height; y++)
{
QColor color = QColor::fromRgb(image->pixel(x, y)); // Getting the pixel(x,y) value
newImage->setPixel(x, y, color == Qt::white ? Qt::color1 : Qt::color0);
}
}
else // if (image->format() == QImage::Format_RGB32)
{
for (int x = 0; x<width; x++)
for (int y = 0; y<height; y++)
{
QRgb pixel = image->pixel(x, y); // Getting the pixel(x,y) value
int r = qRed(pixel); // Get the 0-255 value of the R channel
int g = qGreen(pixel); // Get the 0-255 value of the G channel
int b = qBlue(pixel); // Get the 0-255 value of the B channel
r = (int) floor(r*0.3);
g = (int) floor(g*0.6);
b = (int) floor(b*0.1);
//QColor newPixel = QColor(r, g, b);
newImage->setPixel(x, y, r + g + b);
}
}
return newImage;
}