graw: new tri-instanced.c program to test instanced drawing

1 files changed, 296 insertions, 0 deletions

diff --git a/src/gallium/tests/graw/tri-instanced.c b/src/gallium/tests/graw/tri-instanced.c
new file mode 100644
index 00000000000..1500f1b97fa
--- /dev/null
+++ b/src/gallium/tests/graw/tri-instanced.c
@@ -0,0 +1,296 @@
+/*
+ * Test draw instancing.
+ */
+
+#include "state_tracker/graw.h"
+#include "pipe/p_screen.h"
+#include "pipe/p_context.h"
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+
+#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,
+   PIPE_FORMAT_NONE
+};
+
+static const int WIDTH = 300;
+static const int HEIGHT = 300;
+
+static struct pipe_screen *screen = NULL;
+static struct pipe_context *ctx = NULL;
+static struct pipe_surface *surf = NULL;
+static void *window = NULL;
+
+struct vertex {
+   float position[4];
+   float color[4];
+};
+
+
+/**
+ * Vertex data.
+ * Each vertex has three attributes: position, color and translation.
+ * The translation attribute is a per-instance attribute.  See
+ * "instance_divisor" below.
+ */
+static struct vertex vertices[4] =
+{
+   {
+      { 0.0f, -0.3f, 0.0f, 1.0f },  /* pos */
+      { 1.0f, 0.0f, 0.0f, 1.0f }    /* color */
+   },
+   {
+      { -0.2f, 0.3f, 0.0f, 1.0f },
+      { 0.0f, 1.0f, 0.0f, 1.0f }
+   },
+   {
+      { 0.2f, 0.3f, 0.0f, 1.0f },
+      { 0.0f, 0.0f, 1.0f, 1.0f }
+   }
+};
+
+
+#define NUM_INST 5
+
+static float inst_data[NUM_INST][4] =
+{
+   { -0.50f, 0.4f, 0.0f, 0.0f },
+   { -0.25f, 0.1f, 0.0f, 0.0f },
+   { 0.00f, 0.2f, 0.0f, 0.0f },
+   { 0.25f, 0.1f, 0.0f, 0.0f },
+   { 0.50f, 0.3f, 0.0f, 0.0f }
+};
+
+
+static void set_viewport( float x, float y,
+                          float width, float height,
+                          float near, float far)
+{
+   float z = far;
+   float half_width = (float)width / 2.0f;
+   float half_height = (float)height / 2.0f;
+   float half_depth = ((float)far - (float)near) / 2.0f;
+   struct pipe_viewport_state vp;
+
+   vp.scale[0] = half_width;
+   vp.scale[1] = half_height;
+   vp.scale[2] = half_depth;
+   vp.scale[3] = 1.0f;
+
+   vp.translate[0] = half_width + x;
+   vp.translate[1] = half_height + y;
+   vp.translate[2] = half_depth + z;
+   vp.translate[3] = 0.0f;
+
+   ctx->set_viewport_state( ctx, &vp );
+}
+
+
+static void set_vertices( void )
+{
+   struct pipe_vertex_element ve[3];
+   struct pipe_vertex_buffer vbuf[2];
+   void *handle;
+
+   memset(ve, 0, sizeof ve);
+
+   /* pos */
+   ve[0].src_offset = Offset(struct vertex, position);
+   ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+   ve[0].vertex_buffer_index = 0;
+
+   /* color */
+   ve[1].src_offset = Offset(struct vertex, color);
+   ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+   ve[1].vertex_buffer_index = 0;
+
+   /* per-instance info */
+   ve[2].src_offset = 0;
+   ve[2].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+   ve[2].vertex_buffer_index = 1;
+   ve[2].instance_divisor = 1;
+
+   handle = ctx->create_vertex_elements_state(ctx, 3, ve);
+   ctx->bind_vertex_elements_state(ctx, handle);
+
+
+   /* vertex data */
+   vbuf[0].stride = sizeof( struct vertex );
+   vbuf[0].max_index = sizeof(vertices) / vbuf[0].stride;
+   vbuf[0].buffer_offset = 0;
+   vbuf[0].buffer = screen->user_buffer_create(screen,
+                                               vertices,
+                                               sizeof(vertices),
+                                               PIPE_BIND_VERTEX_BUFFER);
+
+   /* instance data */
+   vbuf[1].stride = sizeof( inst_data[0] );
+   vbuf[1].max_index = sizeof(inst_data) / vbuf[1].stride;
+   vbuf[1].buffer_offset = 0;
+   vbuf[1].buffer = screen->user_buffer_create(screen,
+                                               inst_data,
+                                               sizeof(inst_data),
+                                               PIPE_BIND_VERTEX_BUFFER);
+
+
+   ctx->set_vertex_buffers(ctx, 2, vbuf);
+}
+
+static void set_vertex_shader( void )
+{
+   void *handle;
+   const char *text =
+      "VERT\n"
+      "DCL IN[0]\n"
+      "DCL IN[1]\n"
+      "DCL IN[2]\n"
+      "DCL OUT[0], POSITION\n"
+      "DCL OUT[1], COLOR\n"
+      "  0: MOV OUT[1], IN[1]\n"
+      "  1: ADD OUT[0], IN[0], IN[2]\n"  /* add instance pos to vertex pos */
+      "  2: END\n";
+
+   handle = graw_parse_vertex_shader(ctx, text);
+   ctx->bind_vs_state(ctx, handle);
+}
+
+static void set_fragment_shader( void )
+{
+   void *handle;
+   const char *text =
+      "FRAG\n"
+      "DCL IN[0], COLOR, LINEAR\n"
+      "DCL OUT[0], COLOR\n"
+      "  0: MOV OUT[0], IN[0]\n"
+      "  1: END\n";
+
+   handle = graw_parse_fragment_shader(ctx, text);
+   ctx->bind_fs_state(ctx, handle);
+}
+
+
+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);
+   ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+#if 0
+   /* At the moment, libgraw leaks out/makes available some of the
+    * symbols from gallium/auxiliary, including these debug helpers.
+    * Will eventually want to bless some of these paths, and lock the
+    * others down so they aren't accessible from test programs.
+    *
+    * This currently just happens to work on debug builds - a release
+    * build will probably fail to link here:
+    */
+   debug_dump_surface_bmp(ctx, "result.bmp", surf);
+#endif
+
+   screen->flush_frontbuffer(screen, surf, window);
+}
+
+
+static void init( void )
+{
+   struct pipe_framebuffer_state fb;
+   struct pipe_resource *tex, templat;
+   int i;
+
+   /* It's hard to say whether window or screen should be created
+    * first.  Different environments would prefer one or the other.
+    *
+    * Also, no easy way of querying supported formats if the screen
+    * cannot be created first.
+    */
+   for (i = 0; 
+        window == NULL && formats[i] != PIPE_FORMAT_NONE;
+        i++) {
+      
+      screen = graw_create_window_and_screen(0,0,300,300,
+                                             formats[i],
+                                             &window);
+   }
+   
+   ctx = screen->context_create(screen, NULL);
+   if (ctx == NULL)
+      exit(3);
+
+   templat.target = PIPE_TEXTURE_2D;
+   templat.format = formats[i];
+   templat.width0 = WIDTH;
+   templat.height0 = HEIGHT;
+   templat.depth0 = 1;
+   templat.last_level = 0;
+   templat.nr_samples = 1;
+   templat.bind = (PIPE_BIND_RENDER_TARGET |
+                   PIPE_BIND_DISPLAY_TARGET);
+   
+   tex = screen->resource_create(screen,
+                                 &templat);
+   if (tex == NULL)
+      exit(4);
+
+   surf = screen->get_tex_surface(screen, tex, 0, 0, 0,
+                                  PIPE_BIND_RENDER_TARGET |
+                                  PIPE_BIND_DISPLAY_TARGET);
+   if (surf == NULL)
+      exit(5);
+
+   memset(&fb, 0, sizeof fb);
+   fb.nr_cbufs = 1;
+   fb.width = WIDTH;
+   fb.height = HEIGHT;
+   fb.cbufs[0] = surf;
+
+   ctx->set_framebuffer_state(ctx, &fb);
+   
+   {
+      struct pipe_blend_state blend;
+      void *handle;
+      memset(&blend, 0, sizeof blend);
+      blend.rt[0].colormask = PIPE_MASK_RGBA;
+      handle = ctx->create_blend_state(ctx, &blend);
+      ctx->bind_blend_state(ctx, handle);
+   }
+
+   {
+      struct pipe_depth_stencil_alpha_state depthstencil;
+      void *handle;
+      memset(&depthstencil, 0, sizeof depthstencil);
+      handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
+      ctx->bind_depth_stencil_alpha_state(ctx, handle);
+   }
+
+   {
+      struct pipe_rasterizer_state rasterizer;
+      void *handle;
+      memset(&rasterizer, 0, sizeof rasterizer);
+      rasterizer.cull_face = PIPE_FACE_NONE;
+      rasterizer.gl_rasterization_rules = 1;
+      handle = ctx->create_rasterizer_state(ctx, &rasterizer);
+      ctx->bind_rasterizer_state(ctx, handle);
+   }
+
+   set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
+   set_vertices();
+   set_vertex_shader();
+   set_fragment_shader();
+}
+
+
+int main( int argc, char *argv[] )
+{
+   init();
+
+   graw_set_display_func( draw );
+   graw_main_loop();
+   return 0;
+}