[Mesa-dev] [PATCH 2/8] i965: Push down the gl_vertex_array inputs into i965.

[Mathias.Froehlich at gmx.net]

From: Mathias Fröhlich <mathias.froehlich at web.de>

Let the i965 backend have its own gl_vertex_array array and basically
reimplement the way _vbo_draw works.
Note that brw_draw_indirect_prims calls brw_draw_prims internally
and gets its update to Array._DrawArray by this way.

Signed-off-by: Mathias Fröhlich <Mathias.Froehlich at web.de>
---
 src/mesa/drivers/dri/i965/brw_context.c |  1 +
 src/mesa/drivers/dri/i965/brw_context.h |  4 ++++
 src/mesa/drivers/dri/i965/brw_draw.c    | 23 +++++++++++++++++------
 src/mesa/drivers/dri/i965/brw_draw.h    |  1 +
 4 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index fca5c8e307..78bae33607 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -283,6 +283,7 @@ brw_init_driver_functions(struct brw_context *brw,
    functions->GetString = intel_get_string;
    functions->UpdateState = intel_update_state;
 
+   brw_init_draw_functions(functions);
    intelInitTextureFuncs(functions);
    intelInitTextureImageFuncs(functions);
    intelInitTextureCopyImageFuncs(functions);
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index 177273c364..f049d08649 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -36,6 +36,7 @@
 #include <stdbool.h>
 #include "main/macros.h"
 #include "main/mtypes.h"
+#include "vbo/vbo.h"
 #include "brw_structs.h"
 #include "brw_pipe_control.h"
 #include "compiler/brw_compiler.h"
@@ -954,6 +955,9 @@ struct brw_context
        * These bitfields indicate which workarounds are needed.
        */
       uint8_t attrib_wa_flags[VERT_ATTRIB_MAX];
+
+      /* For the initial pushdown, keep the list of vbo inputs. */
+      struct vbo_inputs draw_arrays;
    } vb;
 
    struct {
diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index 0d1ae8982c..5f52404bd6 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -34,6 +34,7 @@
 #include "main/macros.h"
 #include "main/transformfeedback.h"
 #include "main/framebuffer.h"
+#include "main/varray.h"
 #include "tnl/tnl.h"
 #include "vbo/vbo.h"
 #include "swrast/swrast.h"
@@ -941,11 +942,16 @@ brw_draw_prims(struct gl_context *ctx,
 {
    unsigned i;
    struct brw_context *brw = brw_context(ctx);
-   const struct gl_vertex_array *arrays = ctx->Array._DrawArrays;
+   const struct gl_vertex_array *arrays;
    int predicate_state = brw->predicate.state;
    struct brw_transform_feedback_object *xfb_obj =
       (struct brw_transform_feedback_object *) gl_xfb_obj;
 
+   /* The initial pushdown of the inputs array into the drivers */
+   _mesa_set_drawing_arrays(ctx, brw->vb.draw_arrays.inputs);
+   arrays = ctx->Array._DrawArrays;
+   _vbo_update_inputs(ctx, &brw->vb.draw_arrays);
+
    if (!brw_check_conditional_render(brw))
       return;
 
@@ -1075,14 +1081,19 @@ brw_draw_indirect_prims(struct gl_context *ctx,
 }
 
 void
-brw_draw_init(struct brw_context *brw)
+brw_init_draw_functions(struct dd_function_table *functions)
 {
-   struct gl_context *ctx = &brw->ctx;
-
    /* Register our drawing function:
     */
-   vbo_set_draw_func(ctx, brw_draw_prims);
-   vbo_set_indirect_draw_func(ctx, brw_draw_indirect_prims);
+   functions->Draw = brw_draw_prims;
+   functions->DrawIndirect = brw_draw_indirect_prims;
+}
+
+void
+brw_draw_init(struct brw_context *brw)
+{
+   /* Keep our list of gl_vertex_array inputs */
+   _vbo_init_inputs(&brw->vb.draw_arrays);
 
    for (int i = 0; i < VERT_ATTRIB_MAX; i++)
       brw->vb.inputs[i].buffer = -1;
diff --git a/src/mesa/drivers/dri/i965/brw_draw.h b/src/mesa/drivers/dri/i965/brw_draw.h
index c3a972c276..c74a2536aa 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.h
+++ b/src/mesa/drivers/dri/i965/brw_draw.h
@@ -55,6 +55,7 @@ void brw_draw_prims(struct gl_context *ctx,
                      unsigned stream,
 		     struct gl_buffer_object *indirect );
 
+void brw_init_draw_functions(struct dd_function_table *functions);
 void brw_draw_init( struct brw_context *brw );
 void brw_draw_destroy( struct brw_context *brw );
 
-- 
2.14.3