/**
* Makes the given GraphicsConfig's context current to its associated
* "scratch" surface. If there is a problem making the context current,
* this method will return NULL; otherwise, returns a pointer to the
* OGLContext that is associated with the given GraphicsConfig.
*/
OGLContext *
OGLSD_SetScratchSurface(JNIEnv *env, jlong pConfigInfo)
{
GLXGraphicsConfigInfo *glxInfo =
(GLXGraphicsConfigInfo *)jlong_to_ptr(pConfigInfo);
OGLContext *oglc;
J2dTraceLn(J2D_TRACE_INFO, "OGLSD_SetScratchContext");
if (glxInfo == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLSD_SetScratchContext: glx config info is null");
return NULL;
}
oglc = glxInfo->context;
if (!GLXSD_MakeCurrentToScratch(env, oglc)) {
return NULL;
}
if (OGLC_IS_CAP_PRESENT(oglc, CAPS_EXT_FBOBJECT)) {
// the GL_EXT_framebuffer_object extension is present, so this call
// will ensure that we are bound to the scratch pbuffer (and not
// some other framebuffer object)
j2d_glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
return oglc;
}
/**
* Makes a context current to the given source and destination
* surfaces. If there is a problem making the context current, this method
* will return NULL; otherwise, returns a pointer to the OGLContext that is
* associated with the destination surface.
*/
OGLContext *
OGLSD_MakeOGLContextCurrent(JNIEnv *env, OGLSDOps *srcOps, OGLSDOps *dstOps)
{
GLXSDOps *dstGLXOps = (GLXSDOps *)dstOps->privOps;
OGLContext *oglc;
J2dTraceLn(J2D_TRACE_INFO, "OGLSD_MakeOGLContextCurrent");
oglc = dstGLXOps->configData->glxInfo->context;
if (oglc == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLSD_MakeOGLContextCurrent: context is null");
return NULL;
}
if (dstOps->drawableType == OGLSD_FBOBJECT) {
OGLContext *currentContext = OGLRenderQueue_GetCurrentContext();
// first make sure we have a current context (if the context isn't
// already current to some drawable, we will make it current to
// its scratch surface)
if (oglc != currentContext) {
if (!GLXSD_MakeCurrentToScratch(env, oglc)) {
return NULL;
}
}
// now bind to the fbobject associated with the destination surface;
// this means that all rendering will go into the fbobject destination
// (note that we unbind the currently bound texture first; this is
// recommended procedure when binding an fbobject)
j2d_glBindTexture(dstOps->textureTarget, 0);
j2d_glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, dstOps->fbobjectID);
} else {
GLXSDOps *srcGLXOps = (GLXSDOps *)srcOps->privOps;
GLXCtxInfo *ctxinfo = (GLXCtxInfo *)oglc->ctxInfo;
// make the context current
if (!j2d_glXMakeContextCurrent(awt_display,
dstGLXOps->drawable,
srcGLXOps->drawable,
ctxinfo->context))
{
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLSD_MakeOGLContextCurrent: could not make current");
return NULL;
}
if (OGLC_IS_CAP_PRESENT(oglc, CAPS_EXT_FBOBJECT)) {
// the GL_EXT_framebuffer_object extension is present, so we
// must bind to the default (windowing system provided)
// framebuffer
j2d_glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
}
return oglc;
}
/**
* Makes a context current to the given source and destination
* surfaces. If there is a problem making the context current, this method
* will return NULL; otherwise, returns a pointer to the OGLContext that is
* associated with the destination surface.
*/
OGLContext *
OGLSD_MakeOGLContextCurrent(JNIEnv *env, OGLSDOps *srcOps, OGLSDOps *dstOps)
{
WGLSDOps *srcWGLOps = (WGLSDOps *)srcOps->privOps;
WGLSDOps *dstWGLOps = (WGLSDOps *)dstOps->privOps;
OGLContext *oglc;
WGLCtxInfo *ctxinfo;
HDC srcHDC, dstHDC;
BOOL success;
J2dTraceLn(J2D_TRACE_INFO, "OGLSD_MakeOGLContextCurrent");
J2dTraceLn4(J2D_TRACE_VERBOSE, " src: %d %p dst: %d %p",
srcOps->drawableType, srcOps,
dstOps->drawableType, dstOps);
oglc = dstWGLOps->configInfo->context;
if (oglc == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLSD_MakeOGLContextCurrent: context is null");
return NULL;
}
if (dstOps->drawableType == OGLSD_FBOBJECT) {
OGLContext *currentContext = OGLRenderQueue_GetCurrentContext();
// first make sure we have a current context (if the context isn't
// already current to some drawable, we will make it current to
// its scratch surface)
if (oglc != currentContext) {
if (!WGLSD_MakeCurrentToScratch(env, oglc)) {
return NULL;
}
}
// now bind to the fbobject associated with the destination surface;
// this means that all rendering will go into the fbobject destination
// (note that we unbind the currently bound texture first; this is
// recommended procedure when binding an fbobject)
j2d_glBindTexture(dstOps->textureTarget, 0);
j2d_glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, dstOps->fbobjectID);
return oglc;
}
ctxinfo = (WGLCtxInfo *)oglc->ctxInfo;
// get the hdc for the destination surface
if (dstOps->drawableType == OGLSD_PBUFFER) {
dstHDC = dstWGLOps->pbufferDC;
} else {
dstHDC = GetDC(dstWGLOps->window);
}
// get the hdc for the source surface
if (srcOps->drawableType == OGLSD_PBUFFER) {
srcHDC = srcWGLOps->pbufferDC;
} else {
// the source will always be equal to the destination in this case
srcHDC = dstHDC;
}
// REMIND: in theory we should be able to use wglMakeContextCurrentARB()
// even when the src/dst surfaces are the same, but this causes problems
// on ATI's drivers (see 6525997); for now we will only use it when the
// surfaces are different, otherwise we will use the old
// wglMakeCurrent() approach...
if (srcHDC != dstHDC) {
// use WGL_ARB_make_current_read extension to make context current
success =
j2d_wglMakeContextCurrentARB(dstHDC, srcHDC, ctxinfo->context);
} else {
// use the old approach for making current to the destination
success = j2d_wglMakeCurrent(dstHDC, ctxinfo->context);
}
if (!success) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"OGLSD_MakeOGLContextCurrent: could not make current");
if (dstOps->drawableType != OGLSD_PBUFFER) {
ReleaseDC(dstWGLOps->window, dstHDC);
}
return NULL;
}
if (OGLC_IS_CAP_PRESENT(oglc, CAPS_EXT_FBOBJECT)) {
// the GL_EXT_framebuffer_object extension is present, so we
// must bind to the default (windowing system provided)
// framebuffer
j2d_glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
if (dstOps->drawableType != OGLSD_PBUFFER) {
ReleaseDC(dstWGLOps->window, dstHDC);
}
return oglc;
}