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/* 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 = pipe_buffer_create_with_data(info.ctx,
PIPE_BIND_VERTEX_BUFFER,
PIPE_USAGE_DEFAULT,
bytes,
vertices);
info.ctx->set_vertex_buffers(info.ctx, 0, 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;
union pipe_query_result 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.u64, res2.u64);
if (res1.u64 < expected1_min || res1.u64 > expected1_max)
printf(" Failure: result1 should be near %d\n", expected1);
if (res2.u64 < expected2_min || res2.u64 > expected2_max)
printf(" Failure: result2 should be near %d\n", expected2);
info.ctx->flush(info.ctx, NULL, 0);
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;
}
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