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Diffstat (limited to 'src/gallium/include/pipe/p_screen.h')
-rw-r--r--src/gallium/include/pipe/p_screen.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index 341d1caea0..69db80ee3f 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -56,6 +56,13 @@ struct pipe_buffer;
+struct pipe_buffer_range
+{
+ unsigned offset;
+ unsigned size;
+};
+
+
/**
* Gallium screen/adapter context. Basically everything
* hardware-specific that doesn't actually require a rendering
@@ -213,6 +220,27 @@ struct pipe_screen {
void (*buffer_unmap)( struct pipe_screen *screen,
struct pipe_buffer *buf );
+ /**
+ * Map a subrange of the buffer data store into the client's address space.
+ *
+ * Return pointer is always relative to offset 0, regardless of the
+ * read/write ranges.
+ */
+ void *(*buffer_map_range)( struct pipe_screen *screen,
+ struct pipe_buffer *buf,
+ struct pipe_buffer_range read,
+ struct pipe_buffer_range write,
+ unsigned usage /* XXX: deprecated? */);
+
+ /**
+ * Unmap a buffer.
+ *
+ * written is the range that the client actually wrote.
+ */
+ void (*buffer_unmap_range)( struct pipe_screen *screen,
+ struct pipe_buffer *buf,
+ struct pipe_buffer_range written);
+
void (*buffer_destroy)( struct pipe_screen *screen,
struct pipe_buffer *buf );