On Sep 16, 2011, at 7:44 AM, Kurt Miller wrote:
> On Friday 16 September 2011 03:23:10 am Konstantin Tokarev wrote:
>
>> Seems like I've found possible reason for crash: JNA uses
>> JAWT_MacOSXDrawingSurfaceInfo struct, but we don't provide it. Unmodified
>> JNA just fails to compile.
>>
>> Code fragment from JNA:
>>
>> #elif __APPLE__
>> // WARNING: the view ref is not guaranteed to be stable except during
>> // component paint (see jni_md.h)
>> JAWT_MacOSXDrawingSurfaceInfo* mdsi =
>> (JAWT_MacOSXDrawingSurfaceInfo*)dsi->platformInfo;
>> if (mdsi != NULL) {
>> handle = (unsigned long)mdsi->cocoaViewRef;
>> if (!handle) {
>> throwByName(env, EIllegalState, "Can't get Cocoa View");
>> }
>> }
>> else {
>> throwByName(env, EError, "Can't get OS X platform info");
>> }
>> #else
>> JAWT_X11DrawingSurfaceInfo* xdsi =
>> (JAWT_X11DrawingSurfaceInfo*)dsi->platformInfo;
>> if (xdsi != NULL) {
>> handle = xdsi->drawable;
>> if (!handle) {
>> throwByName(env, EIllegalState, "Can't get Drawable");
>> }
>> }
>> else {
>> throwByName(env, EError, "Can't get X11 platform info");
>> }
>> #endif
>
> Check the Max OS X port for that function. Mac OS X is built on-top
> of bsd-port, meaning they merge bsd-port changes into their tree from
> time to time and then add Cocoa based UI on top.
>
> I'm thinking that we've not gotten far enough into loading jna to hit
> that missing function. We're crashing very earily. The code for
> JNI_OnLoad in jna is here:
>
> https://github.com/twall/jna/blob/master/native/dispatch.c
Actually, the macosx-port doesn't have the JAWT API implemented yet, and it
won't be vending a Cocoa NSView* when we do get around to implementing it. We
actually won't be providing an pointer to the underlying window or view
hierarchy, because it could exist in a separate process. Instead, JAWT clients
will be expected to provide a CoreAnimation layer that they want placed on top
the AWT component they are covering. We will then take that and link it up
across processes to form a coherent render tree.
FYI,
Mike Swingler
Java Engineering
Apple Inc.
