gbm: Add support for __DRIimage based getBuffers when available

This lets us allocate color buffers as __DRIimages and pass them into
the driver instead of having to create a __DRIbuffer with the flink
that requires.

With this patch, we can now run gbm on render-nodes.  A render-node is a
drm device that doesn't support modesetting and all the legacy DRI ioctls.
flink is also not supported, but now that gbm doesn't need flink, we can
run piglit on head-less gbm or head-less GPGPU.

Signed-off-by: Kristian Høgsberg <[email protected]>
Reviewed-by: Chad Versace <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Reviewed-by: Jordan Justen <[email protected]>
Tested-by: Jordan Justen <[email protected]>
Cc: "10.0" <[email protected]>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/gbm/backends/dri/gbm_driint.h b/src/gbm/backends/dri/gbm_driint.h
index cb4e477abf4..fb303a3be55 100644
--- a/src/gbm/backends/dri/gbm_driint.h
+++ b/src/gbm/backends/dri/gbm_driint.h
@@ -52,7 +52,7 @@ struct gbm_dri_device {
    __DRIdri2LoaderExtension *loader;
 
    const __DRIconfig   **driver_configs;
-   const __DRIextension *extensions[4];
+   const __DRIextension *extensions[5];
    const __DRIextension **driver_extensions;
 
    __DRIimage *(*lookup_image)(__DRIscreen *screen, void *image, void *data);
@@ -67,6 +67,12 @@ struct gbm_dri_device {
 			     int *width, int *height,
 			     unsigned int *attachments, int count,
 			     int *out_count, void *data);
+   int (*image_get_buffers)(__DRIdrawable *driDrawable,
+                            unsigned int format,
+                            uint32_t *stamp,
+                            void *loaderPrivate,
+                            uint32_t buffer_mask,
+                            struct __DRIimageList *buffers);
 
    struct wl_drm *wl_drm;
 };