Mesa (master): graw/tests: pass -e option to test draw_elements_instanced()

[Brian Paul]

Module: Mesa
Branch: master
Commit: 895086467e03b15d376dcdff0d772408dda03f88
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=895086467e03b15d376dcdff0d772408dda03f88

Author: Brian Paul <brianp at vmware.com>
Date:   Tue Jul 20 08:39:30 2010 -0600

graw/tests: pass -e option to test draw_elements_instanced()

---

 src/gallium/tests/graw/tri-instanced.c |   46 +++++++++++++++++++++++++++++++-
 1 files changed, 45 insertions(+), 1 deletions(-)

diff --git a/src/gallium/tests/graw/tri-instanced.c b/src/gallium/tests/graw/tri-instanced.c
index 1500f1b..30e205f 100644
--- a/src/gallium/tests/graw/tri-instanced.c
+++ b/src/gallium/tests/graw/tri-instanced.c
@@ -2,6 +2,9 @@
  * Test draw instancing.
  */
 
+#include <stdio.h>
+#include <string.h>
+
 #include "state_tracker/graw.h"
 #include "pipe/p_screen.h"
 #include "pipe/p_context.h"
@@ -11,6 +14,7 @@
 #include "util/u_debug.h"       /* debug_dump_surface_bmp() */
 #include "util/u_memory.h"      /* Offset() */
 
+
 enum pipe_format formats[] = {
    PIPE_FORMAT_R8G8B8A8_UNORM,
    PIPE_FORMAT_B8G8R8A8_UNORM,
@@ -23,6 +27,7 @@ static const int HEIGHT = 300;
 static struct pipe_screen *screen = NULL;
 static struct pipe_context *ctx = NULL;
 static struct pipe_surface *surf = NULL;
+static struct pipe_resource *indexBuffer = NULL;
 static void *window = NULL;
 
 struct vertex {
@@ -31,6 +36,9 @@ struct vertex {
 };
 
 
+static int draw_elements = 0;
+
+
 /**
  * Vertex data.
  * Each vertex has three attributes: position, color and translation.
@@ -66,6 +74,9 @@ static float inst_data[NUM_INST][4] =
 };
 
 
+static ushort indices[3] = { 0, 2, 1 };
+
+
 static void set_viewport( float x, float y,
                           float width, float height,
                           float near, float far)
@@ -138,6 +149,14 @@ static void set_vertices( void )
 
 
    ctx->set_vertex_buffers(ctx, 2, vbuf);
+
+   /* index data */
+   indexBuffer = screen->user_buffer_create(screen,
+                                            indices,
+                                            sizeof(indices),
+                                            PIPE_BIND_VERTEX_BUFFER);
+
+
 }
 
 static void set_vertex_shader( void )
@@ -178,8 +197,17 @@ static void draw( void )
    float clear_color[4] = {1,0,1,1};
 
    ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
+
    /* draw NUM_INST triangles */
-   ctx->draw_arrays_instanced(ctx, PIPE_PRIM_TRIANGLES, 0, 3, 0, NUM_INST);
+   if (draw_elements)
+      ctx->draw_elements_instanced(ctx, indexBuffer, 2,
+                                   0, /* indexBias */
+                                   PIPE_PRIM_TRIANGLES,
+                                   0, 3, /* start, count */
+                                   0, NUM_INST); /* startInst, instCount */
+   else
+      ctx->draw_arrays_instanced(ctx, PIPE_PRIM_TRIANGLES, 0, 3, 0, NUM_INST);
+
    ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
 
 #if 0
@@ -286,8 +314,24 @@ static void init( void )
 }
 
 
+static void options(int argc, char *argv[])
+{
+   int i;
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-e") == 0)
+         draw_elements = 1;
+   }
+   if (draw_elements)
+      printf("Using pipe_context::draw_elements_instanced()\n");
+   else
+      printf("Using pipe_context::draw_arrays_instanced()\n");
+}
+
+
 int main( int argc, char *argv[] )
 {
+   options(argc, argv);
+
    init();
 
    graw_set_display_func( draw );