From: Paul Berry <stereotype...@gmail.com>
---
include/GL/internal/dri_interface.h | 39 +++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/include/GL/internal/dri_interface.h
b/include/GL/internal/dri_interface.h
index 598d111..f419ec7 100644
--- a/include/GL/internal/dri_interface.h
+++ b/include/GL/internal/dri_interface.h
@@ -1651,11 +1651,50 @@ struct __DRIimageLoaderExtensionRec {
struct __DRIimageDriverExtensionRec {
__DRIextension base;
/* Common DRI functions, shared with DRI2 */
__DRIcreateNewScreen2Func createNewScreen2;
__DRIcreateNewDrawableFunc createNewDrawable;
__DRIcreateContextAttribsFunc createContextAttribs;
__DRIgetAPIMaskFunc getAPIMask;
};
+/**
+ * Background callable loader extension.
+ *
+ * Loaders expose this extension to indicate to drivers that they are capable
+ * of handling callbacks from the driver's background drawing threads.
+ */
+#define __DRI_BACKGROUND_CALLABLE "DRI_BackgroundCallable"
+#define __DRI_BACKGROUND_CALLABLE_VERSION 1
+
+typedef struct __DRIbackgroundCallableExtensionRec
__DRIbackgroundCallableExtension;
+struct __DRIbackgroundCallableExtensionRec {
+ __DRIextension base;
+
+ /**
+ * Indicate that this thread is being used by the driver as a background
+ * drawing thread which may make callbacks to the loader.
+ *
+ * \param loaderPrivate is the value that was passed to to the driver when
+ * the context was created. This can be used by the loader to identify
+ * which context any callbacks are associated with.
+ *
+ * If this function is called more than once from any given thread, each
+ * subsequent call overrides the loaderPrivate data that was passed in the
+ * previous call. The driver can take advantage of this to re-use a
+ * background thread to perform drawing on behalf of multiple contexts.
+ *
+ * It is permissible for the driver to call this function from a
+ * non-background thread (i.e. a thread that has already been bound to a
+ * context using __DRIcoreExtensionRec::bindContext()); when this happens,
+ * the \c loaderPrivate pointer must be equal to the pointer that was
+ * passed to the driver when the currently bound context was created.
+ *
+ * This call should execute quickly enough that the driver can call it with
+ * impunity whenever a background thread starts performing drawing
+ * operations (e.g. it should just set a thread-local variable).
+ */
+ void (*setBackgroundContext)(void *loaderPrivate);
+};
+
#endif
--
2.9.3
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
