qwaylandreadbackglxcontext.cpp File Reference

#include "qwaylandreadbackglxcontext.h"
#include "qwaylandshmsurface.h"
#include "qwaylandreadbackglxwindow.h"
#include <QtCore/QDebug>

Go to the source code of this file.

Functions
static void	qgl_byteSwapImage (QImage &img, GLenum pixel_type)

Function Documentation

qgl_byteSwapImage()

static void qgl_byteSwapImage ( QImage &  img, GLenum  pixel_type  )

inlinestatic

Definition at line 49 of file qwaylandreadbackglxcontext.cpp.

Referenced by QWaylandReadbackGlxContext::swapBuffers().

{
    const int width = img.width();
    const int height = img.height();

    if (pixel_type == GL_UNSIGNED_INT_8_8_8_8_REV
        || (pixel_type == GL_UNSIGNED_BYTE && QSysInfo::ByteOrder == QSysInfo::LittleEndian))
    {
        for (int i = 0; i < height; ++i) {
            uint *p = (uint *) img.scanLine(i);
            for (int x = 0; x < width; ++x)
                p[x] = ((p[x] << 16) & 0xff0000) | ((p[x] >> 16) & 0xff) | (p[x] & 0xff00ff00);
        }
    } else {
        for (int i = 0; i < height; ++i) {
            uint *p = (uint *) img.scanLine(i);
            for (int x = 0; x < width; ++x)
                p[x] = (p[x] << 8) | ((p[x] >> 24) & 0xff);
        }
    }
}