Mesa (master): graw: new tri-instanced.c program to test instanced drawing
Brian Paul
brianp at kemper.freedesktop.org
Thu Jul 15 21:43:51 UTC 2010
Module: Mesa
Branch: master
Commit: 77e651db07cd1f811f0ee5323613b27e43bdc077
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=77e651db07cd1f811f0ee5323613b27e43bdc077
Author: Brian Paul <brianp at vmware.com>
Date: Thu Jul 15 15:39:56 2010 -0600
graw: new tri-instanced.c program to test instanced drawing
---
src/gallium/tests/graw/SConscript | 1 +
src/gallium/tests/graw/tri-instanced.c | 296 ++++++++++++++++++++++++++++++++
2 files changed, 297 insertions(+), 0 deletions(-)
diff --git a/src/gallium/tests/graw/SConscript b/src/gallium/tests/graw/SConscript
index a40d66d..6112173 100644
--- a/src/gallium/tests/graw/SConscript
+++ b/src/gallium/tests/graw/SConscript
@@ -14,6 +14,7 @@ env.Prepend(LIBS = ['graw'] + gallium)
progs = [
'clear',
'tri',
+ 'tri-instanced',
'quad-tex',
'fs-test',
'vs-test',
diff --git a/src/gallium/tests/graw/tri-instanced.c b/src/gallium/tests/graw/tri-instanced.c
new file mode 100644
index 0000000..1500f1b
--- /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;
+}
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