QVGPaintEngine *qt_vg_create_paint_engine(void)
{
QVGSharedContext *shared = sharedContext();
if (!shared->engine)
shared->engine = new QVGPaintEngine();
return shared->engine;
}
void qt_vg_register_pixmap(QVGPixmapData *pd)
{
QVGSharedContext *shared = sharedContext();
pd->next = shared->firstPixmap;
pd->prev = 0;
if (shared->firstPixmap)
shared->firstPixmap->prev = pd;
shared->firstPixmap = pd;
}
void qt_vg_unregister_pixmap(QVGPixmapData *pd)
{
if (pd->next)
pd->next->prev = pd->prev;
if (pd->prev) {
pd->prev->next = pd->next;
} else {
QVGSharedContext *shared = sharedContext();
if (shared)
shared->firstPixmap = pd->next;
}
}
QEglContext *qt_vg_create_context(QPaintDevice *device)
{
QVGSharedContext *shared = sharedContext();
if (shared->context) {
++(shared->refCount);
return shared->context;
} else {
shared->context = createContext(device);
shared->refCount = 1;
return shared->context;
}
}
QEglContext *qt_vg_create_context(QPaintDevice *device, int devType)
{
QVGSharedContext *shared = sharedContext();
if (devType == QInternal::Widget)
++(shared->widgetRefCount);
if (shared->context) {
++(shared->refCount);
return shared->context;
} else {
shared->context = createContext(device);
shared->refCount = 1;
return shared->context;
}
}
void qt_vg_destroy_context(QEglContext *context)
{
QVGSharedContext *shared = sharedContext();
if (shared->context != context) {
// This is not the shared context. Shouldn't happen!
delete context;
} else if (--(shared->refCount) <= 0) {
shared->context->makeCurrent(qt_vg_shared_surface());
delete shared->engine;
shared->engine = 0;
shared->context->doneCurrent();
if (shared->surface != EGL_NO_SURFACE) {
eglDestroySurface(shared->context->display(), shared->surface);
shared->surface = EGL_NO_SURFACE;
}
delete shared->context;
shared->context = 0;
}
}
void qt_vg_destroy_context(QEglContext *context, int devType)
{
QVGSharedContext *shared = sharedContext();
if (shared->context != context) {
// This is not the shared context. Shouldn't happen!
delete context;
return;
}
if (devType == QInternal::Widget)
--(shared->widgetRefCount);
if (--(shared->refCount) <= 0) {
qt_vg_destroy_shared_context(shared);
} else if (shared->widgetRefCount <= 0 && devType == QInternal::Widget) {
// All of the widget window surfaces have been destroyed
// but we still have VG pixmaps active. Ask them to hibernate
// to free up GPU resources until a widget is shown again.
// This may eventually cause the EGLContext to be destroyed
// because nothing in the system needs a context, which will
// free up even more GPU resources.
qt_vg_hibernate_pixmaps(shared);
}
}
EGLSurface qt_vg_shared_surface(void)
{
QVGSharedContext *shared = sharedContext();
if (shared->surface == EGL_NO_SURFACE) {
EGLint attribs[7];
attribs[0] = EGL_WIDTH;
attribs[1] = 16;
attribs[2] = EGL_HEIGHT;
attribs[3] = 16;
#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
if (isPremultipliedContext(shared->context)) {
attribs[4] = EGL_VG_ALPHA_FORMAT;
attribs[5] = EGL_VG_ALPHA_FORMAT_PRE;
attribs[6] = EGL_NONE;
} else
#endif
{
attribs[4] = EGL_NONE;
}
shared->surface = eglCreatePbufferSurface
(QEgl::display(), shared->context->config(), attribs);
}
return shared->surface;
}
