qimage_p.h File Reference

#include <QtCore/qglobal.h>
#include <QVector>
#include <QMap>

Go to the source code of this file.

Classes
struct	QImageData

Functions
Q_GUI_EXPORT void	qGamma_correct_back_to_linear_cs (QImage *image)
void	qInitImageConversions ()
int	qt_depthForFormat (QImage::Format format)

Function Documentation

qGamma_correct_back_to_linear_cs()

Q_GUI_EXPORT void qGamma_correct_back_to_linear_cs

(

QImage *

image

)

Definition at line 3938 of file qimage.cpp.

Referenced by QFontEngineMac::alphaRGBMapForGlyph().

{
    extern uchar qt_pow_rgb_gamma[256];

    // gamma correct the pixels back to linear color space...
    int h = image->height();
    int w = image->width();

    for (int y=0; y<h; ++y) {
        uint *pixels = (uint *) image->scanLine(y);
        for (int x=0; x<w; ++x) {
            uint p = pixels[x];
            uint r = qt_pow_rgb_gamma[qRed(p)];
            uint g = qt_pow_rgb_gamma[qGreen(p)];
            uint b = qt_pow_rgb_gamma[qBlue(p)];
            pixels[x] = (r << 16) | (g << 8) | b | 0xff000000;
        }
    }
}

qInitImageConversions()

void qInitImageConversions

(

)

Definition at line 3909 of file qimage.cpp.

{
    const uint features = qDetectCPUFeatures();
    Q_UNUSED(features);

#ifdef QT_HAVE_SSE2
    if (features & SSE2) {
        extern bool convert_ARGB_to_ARGB_PM_inplace_sse2(QImageData *data, Qt::ImageConversionFlags);
        inplace_converter_map[QImage::Format_ARGB32][QImage::Format_ARGB32_Premultiplied] = convert_ARGB_to_ARGB_PM_inplace_sse2;
    }
#endif
#ifdef QT_HAVE_SSSE3
    if (features & SSSE3) {
        extern void convert_RGB888_to_RGB32_ssse3(QImageData *dest, const QImageData *src, Qt::ImageConversionFlags);
        converter_map[QImage::Format_RGB888][QImage::Format_RGB32] = convert_RGB888_to_RGB32_ssse3;
        converter_map[QImage::Format_RGB888][QImage::Format_ARGB32] = convert_RGB888_to_RGB32_ssse3;
        converter_map[QImage::Format_RGB888][QImage::Format_ARGB32_Premultiplied] = convert_RGB888_to_RGB32_ssse3;
    }
#endif
#ifdef QT_HAVE_NEON
    if (features & NEON) {
        extern void convert_RGB888_to_RGB32_neon(QImageData *dest, const QImageData *src, Qt::ImageConversionFlags);
        converter_map[QImage::Format_RGB888][QImage::Format_RGB32] = convert_RGB888_to_RGB32_neon;
        converter_map[QImage::Format_RGB888][QImage::Format_ARGB32] = convert_RGB888_to_RGB32_neon;
        converter_map[QImage::Format_RGB888][QImage::Format_ARGB32_Premultiplied] = convert_RGB888_to_RGB32_neon;
    }
#endif
}

qt_depthForFormat()

int qt_depthForFormat ( QImage::Format  format )

inline

Definition at line 116 of file qimage_p.h.

Referenced by QImage::bitPlaneCount(), QImageData::create(), and QRasterPixmapData::fill().

{
    int depth = 0;
    switch(format) {
    case QImage::Format_Invalid:
    case QImage::NImageFormats:
        Q_ASSERT(false);
    case QImage::Format_Mono:
    case QImage::Format_MonoLSB:
        depth = 1;
        break;
    case QImage::Format_Indexed8:
        depth = 8;
        break;
    case QImage::Format_RGB32:
    case QImage::Format_ARGB32:
    case QImage::Format_ARGB32_Premultiplied:
        depth = 32;
        break;
    case QImage::Format_RGB555:
    case QImage::Format_RGB16:
    case QImage::Format_RGB444:
    case QImage::Format_ARGB4444_Premultiplied:
        depth = 16;
        break;
    case QImage::Format_RGB666:
    case QImage::Format_ARGB6666_Premultiplied:
    case QImage::Format_ARGB8565_Premultiplied:
    case QImage::Format_ARGB8555_Premultiplied:
    case QImage::Format_RGB888:
        depth = 24;
        break;
    }
    return depth;
}