On Wednesday, 30 December 2015 at 23:20:23 UTC, Basile B. wrote:
On Wednesday, 30 December 2015 at 20:44:44 UTC, TheDGuy wrote:
Hello,
is there any way to get the pixel color of a single pixel by x
and y coordinates of a context?
render to a png back buffer.
see cairo_image_surface_create_for_data
then you'll be able to access the data and, at the same time,
to blit your buffer to screen.
Thanks for your answer. But how do i access the function via the
context?
It does not work like this:
class DW:DrawingArea{
this(){
addOnDraw(&drawCallback);
}
bool drawCallback(Scoped!Context cr, Widget widget){
char[] c = new char[](256*256);
auto val =
cr.cairo_image_surface_create_for_data(c,cairo_format_t.CAIRO_FORMAT_ARGB32, 256,256, cairo.format_stride_for_width(cairo_format_t.CAIRO_FORMAT_ARGB32,256));
return true;
}
}
"no property 'cairo_image_surface_create_for_data' for type
'Scoped'"
