To ask how large the current command buffer is.  Will be used for
a new GALLIUM_HUD graph.
---
 src/gallium/drivers/svga/svga_winsys.h    | 6 ++++++
 src/gallium/winsys/svga/drm/vmw_context.c | 8 ++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/gallium/drivers/svga/svga_winsys.h 
b/src/gallium/drivers/svga/svga_winsys.h
index 2238d18..7da2c4e 100644
--- a/src/gallium/drivers/svga/svga_winsys.h
+++ b/src/gallium/drivers/svga/svga_winsys.h
@@ -109,6 +109,12 @@ struct svga_winsys_context
              uint32_t nr_bytes, uint32_t nr_relocs );
    
    /**
+    * Returns current size of command buffer, in bytes.
+    */
+   unsigned
+   (*get_command_buffer_size)(struct svga_winsys_context *swc);
+
+   /**
     * Emit a relocation for a host surface.
     * 
     * @param flags bitmask of SVGA_RELOC_* flags
diff --git a/src/gallium/winsys/svga/drm/vmw_context.c 
b/src/gallium/winsys/svga/drm/vmw_context.c
index dae121e..3944733 100644
--- a/src/gallium/winsys/svga/drm/vmw_context.c
+++ b/src/gallium/winsys/svga/drm/vmw_context.c
@@ -315,6 +315,13 @@ vmw_swc_reserve(struct svga_winsys_context *swc,
    return vswc->command.buffer + vswc->command.used;
 }
 
+static unsigned
+vmw_wddm_swc_get_command_buffer_size(struct svga_winsys_context *swc)
+{
+   const struct vmw_svga_winsys_context *vswc = vmw_svga_winsys_context(swc);
+   return vswc->command.used;
+}
+
 static void
 vmw_swc_context_relocation(struct svga_winsys_context *swc,
                           uint32 *cid)
@@ -761,6 +768,7 @@ vmw_svga_winsys_context_create(struct svga_winsys_screen 
*sws)
 
    vswc->base.destroy = vmw_swc_destroy;
    vswc->base.reserve = vmw_swc_reserve;
+   vswc->base.get_command_buffer_size = vmw_wddm_swc_get_command_buffer_size;
    vswc->base.surface_relocation = vmw_swc_surface_relocation;
    vswc->base.region_relocation = vmw_swc_region_relocation;
    vswc->base.mob_relocation = vmw_swc_mob_relocation;
-- 
1.9.1

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