Hi, I need to call this GDI+ function from the SWT code:
void TextureBrush(
Image *image,
const Rect & dstRect,
const ImageAttributes *imageAttributes
);
For calling, I allocate a new Rect object:
long rect = Gdip.Rect_new(0, 0, Gdip.Image_GetWidth(image2),
Gdip.Image_GetHeight(image2));
long brush = Gdip.TextureBrush_new(image2, rect, attrib);
if (brush == 0) SWT.error(SWT.ERROR_NO_HANDLES);
Gdip.Rect_delete(rect);
The definition in class Gdip is:
/**
* @method flags=new
* @param image cast=(Image *)
* @param rect cast=(Rect *)
* @param attribs cast=(ImageAttributes *)
*/
public static final native long TextureBrush_new(long image, long rect,
long attribs);
The generated JNI code is (I added the pointer dereference of arg1
manually to make it compile):
#ifndef NO_TextureBrush_1new__JJJ
extern "C" JNIEXPORT jlong JNICALL
Gdip_NATIVE(TextureBrush_1new__JJJ)(JNIEnv *env, jclass that, jlong
arg0, jlong arg1, jlong arg2);
JNIEXPORT jlong JNICALL Gdip_NATIVE(TextureBrush_1new__JJJ)
(JNIEnv *env, jclass that, jlong arg0, jlong arg1, jlong arg2)
{
jlong rc = 0;
Gdip_NATIVE_ENTER(env, that, TextureBrush_1new__JJJ_FUNC);
rc = (jlong)new TextureBrush((Image *)arg0, *((Rect *)arg1),
(ImageAttributes *)arg2);
Gdip_NATIVE_EXIT(env, that, TextureBrush_1new__JJJ_FUNC);
return rc;
}
#endif
Of course editing manually is not an acceptable solution.
Is there any idiom to pass parameters from Java to C++ functions that
require references?
Stefan
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