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native implementation of DoGetPixel()

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57823 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Paul Cornett
2009-01-04 02:58:52 +00:00
parent 5852a1dcbb
commit e7f83cccd8
1 changed files with 26 additions and 18 deletions
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44
src/gtk/dcclient.cpp
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@@ -443,25 +443,33 @@ bool wxWindowDCImpl::DoFloodFill(wxCoord x, wxCoord y,
bool wxWindowDCImpl::DoGetPixel( wxCoord x1, wxCoord y1, wxColour *col ) const bool wxWindowDCImpl::DoGetPixel( wxCoord x1, wxCoord y1, wxColour *col ) const
{ {
#if wxUSE_IMAGE GdkImage* image = NULL;
// Generic (and therefore rather inefficient) method. if (m_gdkwindow)
// Could be improved. {
wxMemoryDC memdc; const int x = LogicalToDeviceX(x1);
wxBitmap bitmap(1, 1); const int y = LogicalToDeviceY(y1);
memdc.SelectObject(bitmap); wxRect rect;
memdc.Blit(0, 0, 1, 1, GetOwner(), x1, y1); gdk_drawable_get_size(m_gdkwindow, &rect.width, &rect.height);
memdc.SelectObject(wxNullBitmap); if (rect.Contains(x, y))
image = gdk_drawable_get_image(m_gdkwindow, x, y, 1, 1);
wxImage image = bitmap.ConvertToImage(); }
col->Set(image.GetRed(0, 0), image.GetGreen(0, 0), image.GetBlue(0, 0)); if (image == NULL)
return true; {
#else // !wxUSE_IMAGE *col = wxColour();
wxUnusedVar(x1);
wxUnusedVar(y1);
wxUnusedVar(col);
return false; return false;
#endif // wxUSE_IMAGE/!wxUSE_IMAGE }
GdkColormap* colormap = gdk_image_get_colormap(image);
const unsigned pixel = gdk_image_get_pixel(image, 0, 0);
if (colormap == NULL)
*col = pixel ? m_textForegroundColour : m_textBackgroundColour;
else
{
GdkColor c;
gdk_colormap_query_color(colormap, pixel, &c);
col->Set(c.red >> 8, c.green >> 8, c.blue >> 8);
}
g_object_unref(image);
return true;
} }
void wxWindowDCImpl::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 ) void wxWindowDCImpl::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )