/**
* Fetches the OGLContext associated with the given destination surface,
* makes the context current for those surfaces, updates the destination
* viewport, and then returns a pointer to the OGLContext.
*/
OGLContext *
OGLContext_SetSurfaces(JNIEnv *env, jlong pSrc, jlong pDst)
{
OGLSDOps *srcOps = (OGLSDOps *)jlong_to_ptr(pSrc);
OGLSDOps *dstOps = (OGLSDOps *)jlong_to_ptr(pDst);
OGLContext *oglc = NULL;
J2dTraceLn(J2D_TRACE_INFO, "OGLContext_SetSurfaces");
if (srcOps == NULL || dstOps == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLContext_SetSurfaces: ops are null");
return NULL;
}
J2dTraceLn2(J2D_TRACE_VERBOSE, " srctype=%d dsttype=%d",
srcOps->drawableType, dstOps->drawableType);
if (dstOps->drawableType == OGLSD_TEXTURE) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLContext_SetSurfaces: texture cannot be used as destination");
return NULL;
}
if (dstOps->drawableType == OGLSD_UNDEFINED) {
// initialize the surface as an OGLSD_WINDOW
if (!OGLSD_InitOGLWindow(env, dstOps)) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLContext_SetSurfaces: could not init OGL window");
return NULL;
}
}
// make the context current
oglc = OGLSD_MakeOGLContextCurrent(env, srcOps, dstOps);
if (oglc == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLContext_SetSurfaces: could not make context current");
return NULL;
}
// update the viewport
OGLContext_SetViewport(srcOps, dstOps);
// perform additional one-time initialization, if necessary
if (dstOps->needsInit) {
if (dstOps->isOpaque) {
// in this case we are treating the destination as opaque, but
// to do so, first we need to ensure that the alpha channel
// is filled with fully opaque values (see 6319663)
OGLContext_InitAlphaChannel();
}
dstOps->needsInit = JNI_FALSE;
}
return oglc;
}
/**
* Initializes a surface in the backbuffer of a given double-buffered
* onscreen window for use in a BufferStrategy.Flip situation. The bounds of
* the backbuffer surface should always be kept in sync with the bounds of
* the underlying native window.
*/
JNIEXPORT jboolean JNICALL
Java_sun_java2d_opengl_OGLSurfaceData_initFlipBackbuffer
(JNIEnv *env, jobject oglsd,
jlong pData)
{
OGLSDOps *oglsdo = (OGLSDOps *)jlong_to_ptr(pData);
J2dTraceLn(J2D_TRACE_INFO, "OGLSurfaceData_initFlipBackbuffer");
if (oglsdo == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLSurfaceData_initFlipBackbuffer: ops are null");
return JNI_FALSE;
}
if (oglsdo->drawableType == OGLSD_UNDEFINED) {
if (!OGLSD_InitOGLWindow(env, oglsdo)) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLSurfaceData_initFlipBackbuffer: could not init window");
return JNI_FALSE;
}
}
if (oglsdo->drawableType != OGLSD_WINDOW) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLSurfaceData_initFlipBackbuffer: drawable is not a window");
return JNI_FALSE;
}
oglsdo->drawableType = OGLSD_FLIP_BACKBUFFER;
// x/yOffset have already been set in OGLSD_InitOGLWindow()...
// REMIND: for some reason, flipping won't work properly on IFB unless we
// explicitly use BACK_LEFT rather than BACK...
oglsdo->activeBuffer = GL_BACK_LEFT;
OGLSD_SetNativeDimensions(env, oglsdo, oglsdo->width, oglsdo->height);
return JNI_TRUE;
}
