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

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This commit is contained in:
Brian Paul
2010-07-15 15:39:56 -06:00
parent 2bd69080a2
commit 77e651db07
2 changed files with 297 additions and 0 deletions
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src/gallium/tests/graw/SConscript
+1
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@@ -14,6 +14,7 @@ env.Prepend(LIBS = ['graw'] + gallium)
progs = [
'clear',
'tri',
'tri-instanced',
'quad-tex',
'fs-test',
'vs-test',
src/gallium/tests/graw/tri-instanced.c
+296
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@@ -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;
}