uint QGLContext::colorIndex( const QColor& c ) const
{
if ( isValid() ) {
if ( format().plane()
&& c.pixel() == overlayTransparentColor().pixel() )
return c.pixel(); // Special; don't look-up
if ( ((XVisualInfo*)vi)->visualid ==
XVisualIDFromVisual( (Visual*)QPaintDevice::x11AppVisual() ) )
return c.pixel(); // We're using QColor's cmap
CMapEntry *x = cmap_dict->find( (long)((XVisualInfo*)vi)->visualid );
if ( x && !x->alloc) { // It's a standard colormap
int rf = (int)(((float)c.red() * (x->scmap.red_max+1))/256.0);
int gf = (int)(((float)c.green() * (x->scmap.green_max+1))/256.0);
int bf = (int)(((float)c.blue() * (x->scmap.blue_max+1))/256.0);
uint p = x->scmap.base_pixel
+ ( rf * x->scmap.red_mult )
+ ( gf * x->scmap.green_mult )
+ ( bf * x->scmap.blue_mult );
return p;
}
else
return c.pixel(); // ### wrong; should really ask QColor to alloc
}
return 0;
}
uint QGLContext::colorIndex( const QColor& c ) const
{
int screen = ((XVisualInfo *)vi)->screen;
if ( isValid() ) {
if ( format().plane()
&& c.pixel( screen ) == overlayTransparentColor().pixel( screen ) )
return c.pixel( screen ); // Special; don't look-up
if ( ((XVisualInfo*)vi)->visualid ==
XVisualIDFromVisual( (Visual*)QPaintDevice::x11AppVisual( screen ) ) )
return c.pixel( screen ); // We're using QColor's cmap
XVisualInfo *info = (XVisualInfo *) vi;
CMapEntry *x = cmap_dict->find( (long) info->visualid + ( info->screen * 256 ) );
if ( x && !x->alloc) { // It's a standard colormap
int rf = (int)(((float)c.red() * (x->scmap.red_max+1))/256.0);
int gf = (int)(((float)c.green() * (x->scmap.green_max+1))/256.0);
int bf = (int)(((float)c.blue() * (x->scmap.blue_max+1))/256.0);
uint p = x->scmap.base_pixel
+ ( rf * x->scmap.red_mult )
+ ( gf * x->scmap.green_mult )
+ ( bf * x->scmap.blue_mult );
return p;
} else {
if (!qglcmap_dict) {
qglcmap_dict = new QIntDict< QMap<int, QRgb> >;
}
QMap<int, QRgb> *cmap;
if ((cmap = qglcmap_dict->find((long) info->visualid)) == 0) {
cmap = new QMap<int, QRgb>;
qglcmap_dict->insert((long) info->visualid, cmap);
}
// already in the map?
QRgb target = c.rgb();
QMap<int, QRgb>::Iterator it = cmap->begin();
for (; it != cmap->end(); ++it) {
if ((*it) == target)
return it.key();
}
// need to alloc color
unsigned long plane_mask[2];
unsigned long color_map_entry;
if (!XAllocColorCells (QPaintDevice::x11AppDisplay(), x->cmap, TRUE, plane_mask, 0,
&color_map_entry, 1))
return c.pixel(screen);
XColor col;
col.flags = DoRed | DoGreen | DoBlue;
col.pixel = color_map_entry;
col.red = (ushort)((qRed(c.rgb()) / 255.0) * 65535.0 + 0.5);
col.green = (ushort)((qGreen(c.rgb()) / 255.0) * 65535.0 + 0.5);
col.blue = (ushort)((qBlue(c.rgb()) / 255.0) * 65535.0 + 0.5);
XStoreColor(QPaintDevice::x11AppDisplay(), x->cmap, &col);
cmap->insert(color_map_entry, target);
return color_map_entry;
}
}
return 0;
}
