tests/graw: Add a bunch of tests.

These were rotting in an internal branch, but contain nothing confidential,
and would be much more useful if kept up-to-date with latest gallium
interface changes.

Several authors including Keith Whitwell, Zack Rusin, and Brian Paul.

1 files changed, 242 insertions, 0 deletions

diff --git a/src/gallium/tests/graw/occlusion-query.c b/src/gallium/tests/graw/occlusion-query.c
new file mode 100644
index 00000000000..5c4bc8cf479
--- /dev/null
+++ b/src/gallium/tests/graw/occlusion-query.c
@@ -0,0 +1,242 @@
+/* Test gallium occlusion queries.
+ */
+
+#include <stdio.h>
+
+#include "graw_util.h"
+
+
+static int width = 300;
+static int height = 300;
+
+/* expected results of occlusion test (depndsd on window size) */
+static int expected1 = (int) ((300 * 0.9) * (300 * 0.9));
+static int expected2 = 420;
+
+
+static struct graw_info info;
+
+struct vertex {
+   float position[4];
+   float color[4];
+};
+
+#define z0 0.2
+#define z1 0.6
+
+static struct vertex obj1_vertices[4] =
+{
+   {
+      {-0.9, -0.9, z0, 1.0 },
+      { 1, 0, 0, 1 }
+   },
+
+   {
+      { 0.9, -0.9, z0, 1.0 },
+      { 1, 0, 0, 1 }
+   },
+
+   {
+      { 0.9,  0.9, z0, 1.0 },
+      { 1, 0, 0, 1 }
+   },
+
+   {
+      {-0.9,  0.9, z0, 1.0 },
+      { 1, 0, 0, 1 }
+   }
+};
+
+static struct vertex obj2_vertices[4] = 
+{
+   {
+      { -0.2,  -0.2, z1, 1.0 },
+      { 0, 0, 1, 1 }
+   },
+
+   {
+      { 0.95, -0.2, z1, 1.0 },
+      { 0, 0, 1, 1 }
+   },
+
+   {
+      { 0.95,  0.2, z1, 1.0 },
+      { 0, 0, 1, 1 }
+   },
+
+   {
+      { -0.2, 0.2, z1, 1.0 },
+      { 0, 0, 1, 1 }
+   },
+};
+
+#define NUM_VERTS 4
+
+
+
+static void
+set_vertices(struct vertex *vertices, unsigned bytes)
+{
+   struct pipe_vertex_element ve[2];
+   struct pipe_vertex_buffer vbuf;
+   void *handle;
+
+   memset(ve, 0, sizeof ve);
+
+   ve[0].src_offset = Offset(struct vertex, position);
+   ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+   ve[1].src_offset = Offset(struct vertex, color);
+   ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+
+   handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
+   info.ctx->bind_vertex_elements_state(info.ctx, handle);
+
+
+   vbuf.stride = sizeof(struct vertex);
+   vbuf.buffer_offset = 0;
+   vbuf.buffer = info.screen->user_buffer_create(info.screen,
+                                            vertices,
+                                            bytes,
+                                            PIPE_BIND_VERTEX_BUFFER);
+
+   info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
+}
+
+
+static void
+set_vertex_shader(struct graw_info *info)
+{
+   void *handle;
+   const char *text =
+      "VERT\n"
+      "DCL IN[0]\n"
+      "DCL IN[1]\n"
+      "DCL OUT[0], POSITION\n"
+      "DCL OUT[1], GENERIC[0]\n"
+      "  0: MOV OUT[0], IN[0]\n"
+      "  1: MOV OUT[1], IN[1]\n"
+      "  2: END\n";
+
+   handle = graw_parse_vertex_shader(info->ctx, text);
+   if (!handle) {
+      debug_printf("Failed to parse vertex shader\n");
+      return;
+   }
+   info->ctx->bind_vs_state(info->ctx, handle);
+}
+
+
+static void
+set_fragment_shader(struct graw_info *info)
+{
+   void *handle;
+   const char *text =
+      "FRAG\n"
+      "DCL IN[0], GENERIC, LINEAR\n"
+      "DCL OUT[0], COLOR\n"
+      " 0: MOV OUT[0], IN[0]\n"
+      " 1: END\n";
+
+   handle = graw_parse_fragment_shader(info->ctx, text);
+   if (!handle) {
+      debug_printf("Failed to parse fragment shader\n");
+      return;
+   }
+   info->ctx->bind_fs_state(info->ctx, handle);
+}
+
+
+static void
+draw(void)
+{
+   int expected1_min = (int) (expected1 * 0.95);
+   int expected1_max = (int) (expected1 * 1.05);
+   int expected2_min = (int) (expected2 * 0.95);
+   int expected2_max = (int) (expected2 * 1.05);
+
+   union pipe_color_union clear_color;
+
+   struct pipe_query *q1, *q2;
+   uint64_t res1, res2;
+
+   clear_color.f[0] = 0.25;
+   clear_color.f[1] = 0.25;
+   clear_color.f[2] = 0.25;
+   clear_color.f[3] = 1.00;
+
+   info.ctx->clear(info.ctx,
+                   PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
+                   &clear_color, 1.0, 0);
+
+   q1 = info.ctx->create_query(info.ctx, PIPE_QUERY_OCCLUSION_COUNTER);
+   q2 = info.ctx->create_query(info.ctx, PIPE_QUERY_OCCLUSION_COUNTER);
+
+   /* draw first, large object */
+   set_vertices(obj1_vertices, sizeof(obj1_vertices));
+   info.ctx->begin_query(info.ctx, q1);
+   util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
+   info.ctx->end_query(info.ctx, q1);
+
+   /* draw second, small object behind first object */
+   set_vertices(obj2_vertices, sizeof(obj2_vertices));
+   info.ctx->begin_query(info.ctx, q2);
+   util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
+   info.ctx->end_query(info.ctx, q2);
+
+   info.ctx->get_query_result(info.ctx, q1, TRUE, &res1);
+   info.ctx->get_query_result(info.ctx, q2, TRUE, &res2);
+
+   printf("result1 = %lu  result2 = %lu\n", res1, res2);
+   if (res1 < expected1_min || res1 > expected1_max)
+      printf("  Failure: result1 should be near %d\n", expected1);
+   if (res2 < expected2_min || res2 > expected2_max)
+      printf("  Failure: result2 should be near %d\n", expected2);
+
+   info.ctx->flush(info.ctx, NULL);
+
+   graw_util_flush_front(&info);
+
+   info.ctx->destroy_query(info.ctx, q1);
+   info.ctx->destroy_query(info.ctx, q2);
+}
+
+
+#if 0
+static void
+resize(int w, int h)
+{
+   width = w;
+   height = h;
+
+   graw_util_viewport(&info, 0, 0, width, height, 30, 1000);
+}
+#endif
+
+
+static void
+init(void)   
+{
+   if (!graw_util_create_window(&info, width, height, 1, TRUE))
+      exit(1);
+
+   graw_util_default_state(&info, TRUE);
+
+   graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0);
+
+   set_vertex_shader(&info);
+   set_fragment_shader(&info);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   init();
+
+   printf("The red quad should mostly occlude the blue quad.\n");
+
+   graw_set_display_func(draw);
+   /*graw_set_reshape_func(resize);*/
+   graw_main_loop();
+   return 0;
+}