gallium: add sufficient draw interface to allow new indirect features

This makes it possible to support indirect multidraws as well as having
the number of such draws to come from a separate GPU resource.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h
index 8463363..2e4d283 100644 (file)
--- a/src/gallium/include/pipe/p_state.h
+++ b/src/gallium/include/pipe/p_state.h
@@ -620,7 +620,7 @@ struct pipe_draw_info
     */
    struct pipe_stream_output_target *count_from_stream_output;
 
-   /* Indirect parameters resource: If not NULL, most values are taken
+   /* Indirect draw parameters resource: If not NULL, most values are taken
     * from this buffer instead, which is laid out as follows:
     *
     * if indexed is TRUE:
@@ -641,6 +641,15 @@ struct pipe_draw_info
     */
    struct pipe_resource *indirect;
    unsigned indirect_offset; /**< must be 4 byte aligned */
+   unsigned indirect_stride; /**< must be 4 byte aligned */
+   unsigned indirect_count; /**< number of indirect draws */
+
+   /* Indirect draw count resource: If not NULL, contains a 32-bit value which
+    * is to be used as the real indirect_count. In that case indirect_count
+    * becomes the maximum possible value.
+    */
+   struct pipe_resource *indirect_params;
+   unsigned indirect_params_offset; /**< must be 4 byte aligned */
 };