src/gallium/tests/graw/occlusion-query.c

   1 /* Test gallium occlusion queries.
   2  */
   3
   4 #include <stdio.h>
   5
   6 #include "graw_util.h"
   7
   8
   9 static int width = 300;
  10 static int height = 300;
  11
  12 /* expected results of occlusion test (depndsd on window size) */
  13 static int expected1 = (int) ((300 * 0.9) * (300 * 0.9));
  14 static int expected2 = 420;
  15
  16
  17 static struct graw_info info;
  18
  19 struct vertex {
  20    float position[4];
  21    float color[4];
  22 };
  23
  24 #define z0 0.2
  25 #define z1 0.6
  26
  27 static struct vertex obj1_vertices[4] =
  28 {
  29    {
  30       {-0.9, -0.9, z0, 1.0 },
  31       { 1, 0, 0, 1 }
  32    },
  33
  34    {
  35       { 0.9, -0.9, z0, 1.0 },
  36       { 1, 0, 0, 1 }
  37    },
  38
  39    {
  40       { 0.9,  0.9, z0, 1.0 },
  41       { 1, 0, 0, 1 }
  42    },
  43
  44    {
  45       {-0.9,  0.9, z0, 1.0 },
  46       { 1, 0, 0, 1 }
  47    }
  48 };
  49
  50 static struct vertex obj2_vertices[4] =
  51 {
  52    {
  53       { -0.2,  -0.2, z1, 1.0 },
  54       { 0, 0, 1, 1 }
  55    },
  56
  57    {
  58       { 0.95, -0.2, z1, 1.0 },
  59       { 0, 0, 1, 1 }
  60    },
  61
  62    {
  63       { 0.95,  0.2, z1, 1.0 },
  64       { 0, 0, 1, 1 }
  65    },
  66
  67    {
  68       { -0.2, 0.2, z1, 1.0 },
  69       { 0, 0, 1, 1 }
  70    },
  71 };
  72
  73 #define NUM_VERTS 4
  74
  75
  76
  77 static void
  78 set_vertices(struct vertex *vertices, unsigned bytes)
  79 {
  80    struct pipe_vertex_element ve[2];
  81    struct pipe_vertex_buffer vbuf;
  82    void *handle;
  83
  84    memset(ve, 0, sizeof ve);
  85
  86    ve[0].src_offset = Offset(struct vertex, position);
  87    ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  88    ve[1].src_offset = Offset(struct vertex, color);
  89    ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  90
  91    handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
  92    info.ctx->bind_vertex_elements_state(info.ctx, handle);
  93
  94
  95    vbuf.stride = sizeof(struct vertex);
  96    vbuf.buffer_offset = 0;
  97    vbuf.buffer = info.screen->user_buffer_create(info.screen,
  98                                             vertices,
  99                                             bytes,
 100                                             PIPE_BIND_VERTEX_BUFFER);
 101
 102    info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
 103 }
 104
 105
 106 static void
 107 set_vertex_shader(struct graw_info *info)
 108 {
 109    void *handle;
 110    const char *text =
 111       "VERT\n"
 112       "DCL IN[0]\n"
 113       "DCL IN[1]\n"
 114       "DCL OUT[0], POSITION\n"
 115       "DCL OUT[1], GENERIC[0]\n"
 116       "  0: MOV OUT[0], IN[0]\n"
 117       "  1: MOV OUT[1], IN[1]\n"
 118       "  2: END\n";
 119
 120    handle = graw_parse_vertex_shader(info->ctx, text);
 121    if (!handle) {
 122       debug_printf("Failed to parse vertex shader\n");
 123       return;
 124    }
 125    info->ctx->bind_vs_state(info->ctx, handle);
 126 }
 127
 128
 129 static void
 130 set_fragment_shader(struct graw_info *info)
 131 {
 132    void *handle;
 133    const char *text =
 134       "FRAG\n"
 135       "DCL IN[0], GENERIC, LINEAR\n"
 136       "DCL OUT[0], COLOR\n"
 137       " 0: MOV OUT[0], IN[0]\n"
 138       " 1: END\n";
 139
 140    handle = graw_parse_fragment_shader(info->ctx, text);
 141    if (!handle) {
 142       debug_printf("Failed to parse fragment shader\n");
 143       return;
 144    }
 145    info->ctx->bind_fs_state(info->ctx, handle);
 146 }
 147
 148
 149 static void
 150 draw(void)
 151 {
 152    int expected1_min = (int) (expected1 * 0.95);
 153    int expected1_max = (int) (expected1 * 1.05);
 154    int expected2_min = (int) (expected2 * 0.95);
 155    int expected2_max = (int) (expected2 * 1.05);
 156
 157    union pipe_color_union clear_color;
 158
 159    struct pipe_query *q1, *q2;
 160    uint64_t res1, res2;
 161
 162    clear_color.f[0] = 0.25;
 163    clear_color.f[1] = 0.25;
 164    clear_color.f[2] = 0.25;
 165    clear_color.f[3] = 1.00;
 166
 167    info.ctx->clear(info.ctx,
 168                    PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
 169                    &clear_color, 1.0, 0);
 170
 171    q1 = info.ctx->create_query(info.ctx, PIPE_QUERY_OCCLUSION_COUNTER);
 172    q2 = info.ctx->create_query(info.ctx, PIPE_QUERY_OCCLUSION_COUNTER);
 173
 174    /* draw first, large object */
 175    set_vertices(obj1_vertices, sizeof(obj1_vertices));
 176    info.ctx->begin_query(info.ctx, q1);
 177    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
 178    info.ctx->end_query(info.ctx, q1);
 179
 180    /* draw second, small object behind first object */
 181    set_vertices(obj2_vertices, sizeof(obj2_vertices));
 182    info.ctx->begin_query(info.ctx, q2);
 183    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
 184    info.ctx->end_query(info.ctx, q2);
 185
 186    info.ctx->get_query_result(info.ctx, q1, TRUE, &res1);
 187    info.ctx->get_query_result(info.ctx, q2, TRUE, &res2);
 188
 189    printf("result1 = %lu  result2 = %lu\n", res1, res2);
 190    if (res1 < expected1_min || res1 > expected1_max)
 191       printf("  Failure: result1 should be near %d\n", expected1);
 192    if (res2 < expected2_min || res2 > expected2_max)
 193       printf("  Failure: result2 should be near %d\n", expected2);
 194
 195    info.ctx->flush(info.ctx, NULL);
 196
 197    graw_util_flush_front(&info);
 198
 199    info.ctx->destroy_query(info.ctx, q1);
 200    info.ctx->destroy_query(info.ctx, q2);
 201 }
 202
 203
 204 #if 0
 205 static void
 206 resize(int w, int h)
 207 {
 208    width = w;
 209    height = h;
 210
 211    graw_util_viewport(&info, 0, 0, width, height, 30, 1000);
 212 }
 213 #endif
 214
 215
 216 static void
 217 init(void)
 218 {
 219    if (!graw_util_create_window(&info, width, height, 1, TRUE))
 220       exit(1);
 221
 222    graw_util_default_state(&info, TRUE);
 223
 224    graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0);
 225
 226    set_vertex_shader(&info);
 227    set_fragment_shader(&info);
 228 }
 229
 230
 231 int
 232 main(int argc, char *argv[])
 233 {
 234    init();
 235
 236    printf("The red quad should mostly occlude the blue quad.\n");
 237
 238    graw_set_display_func(draw);
 239    /*graw_set_reshape_func(resize);*/
 240    graw_main_loop();
 241    return 0;
 242 }