Hello,
After much googling and compiling, I've still not been able to blit
the contents of an HIView into a bitmap. My code looks roughly like
this:
// HIViewRef window is an 800x600 window
HIViewRef content_view ;
HIViewFindByID(
HIViewGetRoot(window),
kHIViewWindowContentID,
&content_view) ;
HIRect bounds ;
bounds.origin.x = 0 ;
bounds.origin.y = 0 ;
bounds.size.width = 800 ;
bounds.size.height = 600 ;
CGImageRef image ;
HIViewCreateOffscreenImage(
content_view,
0,
&bounds,
&image) ;
//
// my_surface is my own struct for offscreen bits
//
HIViewRef context = CGBitmapContextCreate(
my_surface.bits,
my_surface.width,
my_surface.height,
8,
my_surface.pitch,
CGImageGetColorSpace(image),
CGImageGetBitmapInfo(image)) ;
CGContextBeginPage(context, &bounds) ;
CGContextDrawImage(context, bounds, image) ;
CGContextEndPage(context) ;
Everything runs fine except that my_surface.bits is untouched. My
test code is based on /Developer/Examples/WebKit/SimpleCarbonWeb; the
window is a simple web page. The page loads fine, I see images, etc,
so I am sure that things are being initialized properly. The above is
called well after everything has loaded.
Flailing around in the dark, I've tried calling various functions such
as HIViewSetNeedsDisplay(), sending kEventWindowUpdate,
kEventWindowDrawContent, kEventWindowDrawFrame events to the window's
event target, etc, all to no avail.
Any help would be appreciated.
-Jeff
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