Hi!
I have created a small IUP+CD program which draws a box sith a stipple
pattern. Code attached below. It seems that CD_TRANSPARENT does not work for
back opacity using stipples (?). For Hatches it works as expected.
/* Robert.P., Sweden */
//CODE START
#include <cd.h>
#include <cdpdf.h>
#include <iup.h>
#include <cdiup.h>
static cdCanvas* cdcanvas;
static unsigned char stip[]= {
1,1,0,0,0,0,
1,1,0,0,0,0,
0,0,0,0,0,0,
0,0,0,0,0,0,
0,0,0,0,0,0,
0,0,0,0,0,0
};
int canvasaction(Ihandle* ih) {
cdCanvasActivate(cdcanvas);
//draw a see-through line
cdCanvasForeground(cdcanvas,0xff0000);
cdCanvasLine(cdcanvas,0,0,200,200);
//draw a test rectangle
cdCanvasBackground(cdcanvas,0xffff00);
cdCanvasForeground(cdcanvas,0x00);
cdCanvasBackOpacity(cdcanvas,CD_TRANSPARENT);
cdCanvasStipple(cdcanvas,6,6,stip);
cdCanvasBox(cdcanvas,50,200,50,200);
return IUP_DEFAULT;
}
int main()
{
IupOpen(0,0);
Ihandle* canvas;
Ihandle* dlg=IupDialog(canvas=IupCanvas(0));
IupSetAttribute(canvas,"RASTERSIZE","500x500");
IupSetCallback(canvas,"ACTION",canvasaction);
IupMap(dlg);
cdcanvas=cdCreateCanvas(CD_IUP,canvas);
IupShow(dlg);
IupMainLoop();
IupClose();
return 0;
}
//END
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