src/gallium/tests/graw/vs-test.c

   1 /* Display a cleared blue window.  This demo has no dependencies on
   2  * any utility code, just the graw interface and gallium.
   3  */
   4
   5 #include "state_tracker/graw.h"
   6 #include "pipe/p_screen.h"
   7 #include "pipe/p_context.h"
   8 #include "pipe/p_shader_tokens.h"
   9 #include "pipe/p_state.h"
  10 #include "pipe/p_defines.h"
  11
  12 #include <stdio.h>              /* for fread(), etc */
  13
  14 #include "util/u_inlines.h"
  15 #include "util/u_memory.h"      /* Offset() */
  16 #include "util/u_draw_quad.h"
  17 #include "util/u_box.h"
  18
  19 static const char *filename = NULL;
  20 unsigned show_fps = 0;
  21
  22
  23 static void usage(char *name)
  24 {
  25    fprintf(stderr, "usage: %s [ options ] shader_filename\n", name);
  26 #ifndef WIN32
  27    fprintf(stderr, "\n" );
  28    fprintf(stderr, "options:\n");
  29    fprintf(stderr, "    -fps  show frames per second\n");
  30 #endif
  31 }
  32
  33
  34 enum pipe_format formats[] = {
  35    PIPE_FORMAT_R8G8B8A8_UNORM,
  36    PIPE_FORMAT_B8G8R8A8_UNORM,
  37    PIPE_FORMAT_NONE
  38 };
  39
  40 static const int WIDTH = 250;
  41 static const int HEIGHT = 250;
  42
  43 static struct pipe_screen *screen = NULL;
  44 static struct pipe_context *ctx = NULL;
  45 static struct pipe_resource *rttex = NULL;
  46 static struct pipe_resource *constbuf = NULL;
  47 static struct pipe_surface *surf = NULL;
  48 static struct pipe_sampler_view *sv = NULL;
  49 static void *sampler = NULL;
  50 static void *window = NULL;
  51 static struct pipe_resource *samptex = NULL;
  52
  53 struct vertex {
  54    float position[4];
  55    float color[3];
  56 };
  57
  58 /* Draw a regular mesh
  59  */
  60 #define MESH_SZ 16
  61 static struct vertex vertices[MESH_SZ * MESH_SZ];
  62
  63 static float constants[] =
  64 {  0.4, 0, 0,  1,
  65    1,   1, 1,  1,
  66    2,   2, 2,  2,
  67    4,   8, 16, 32,
  68
  69    3,  0, 0, 0,
  70    0, .5, 0, 0,
  71    0,  0, 1, 0,
  72    0,  0, 0, 1,
  73
  74    1, 0, 0, 0.5,
  75    0, 1, 0, 0.5,
  76    0, 0, 1, 0,
  77    0, 0, 0, 1,
  78 };
  79
  80 static void init_fs_constbuf( void )
  81 {
  82    struct pipe_resource templat;
  83    struct pipe_box box;
  84
  85    templat.target = PIPE_BUFFER;
  86    templat.format = PIPE_FORMAT_R8_UNORM;
  87    templat.width0 = sizeof(constants);
  88    templat.height0 = 1;
  89    templat.depth0 = 1;
  90    templat.last_level = 0;
  91    templat.nr_samples = 1;
  92    templat.bind = PIPE_BIND_CONSTANT_BUFFER;
  93
  94    constbuf = screen->resource_create(screen,
  95                                       &templat);
  96    if (constbuf == NULL)
  97       exit(4);
  98
  99
 100    u_box_2d(0,0,sizeof(constants),1, &box);
 101
 102    ctx->transfer_inline_write(ctx,
 103                               constbuf,
 104                               u_subresource(0,0),
 105                               PIPE_TRANSFER_WRITE,
 106                               &box,
 107                               constants,
 108                               sizeof constants,
 109                               sizeof constants);
 110
 111
 112    ctx->set_constant_buffer(ctx,
 113                             PIPE_SHADER_FRAGMENT, 0,
 114                             constbuf);
 115 }
 116
 117
 118 static void set_viewport( float x, float y,
 119                           float width, float height,
 120                           float near, float far)
 121 {
 122    float z = far;
 123    float half_width = (float)width / 2.0f;
 124    float half_height = (float)height / 2.0f;
 125    float half_depth = ((float)far - (float)near) / 2.0f;
 126    struct pipe_viewport_state vp;
 127
 128    vp.scale[0] = half_width;
 129    vp.scale[1] = half_height;
 130    vp.scale[2] = half_depth;
 131    vp.scale[3] = 1.0f;
 132
 133    vp.translate[0] = half_width + x;
 134    vp.translate[1] = half_height + y;
 135    vp.translate[2] = half_depth + z;
 136    vp.translate[3] = 0.0f;
 137
 138    ctx->set_viewport_state( ctx, &vp );
 139 }
 140
 141 static void set_vertices( void )
 142 {
 143    struct pipe_vertex_element ve[2];
 144    struct pipe_vertex_buffer vbuf;
 145    void *handle;
 146    int x,y;
 147
 148    memset(ve, 0, sizeof ve);
 149
 150    ve[0].src_offset = Offset(struct vertex, position);
 151    ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 152    ve[1].src_offset = Offset(struct vertex, color);
 153    ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 154
 155    handle = ctx->create_vertex_elements_state(ctx, 2, ve);
 156    ctx->bind_vertex_elements_state(ctx, handle);
 157
 158    for (x = 0; x < MESH_SZ; x++) {
 159       for (y = 0; y < MESH_SZ; y++) {
 160          int i = y * MESH_SZ + x;
 161          vertices[i].position[0] = ((float)x)/MESH_SZ * 2.0 - 1.0;
 162          vertices[i].position[1] = ((float)y)/MESH_SZ * 2.0 - 1.0;
 163          vertices[i].position[2] = 0;
 164          vertices[i].position[3] = 1.0;
 165
 166          vertices[i].color[0] = .5;
 167          vertices[i].color[1] = (float)x / (float)MESH_SZ;
 168          vertices[i].color[2] = (float)y / (float)MESH_SZ;
 169       }
 170    }
 171
 172    vbuf.stride = sizeof( struct vertex );
 173    vbuf.max_index = sizeof(vertices) / vbuf.stride;
 174    vbuf.buffer_offset = 0;
 175    vbuf.buffer = screen->user_buffer_create(screen,
 176                                             vertices,
 177                                             sizeof(vertices),
 178                                             PIPE_BIND_VERTEX_BUFFER);
 179
 180    ctx->set_vertex_buffers(ctx, 1, &vbuf);
 181 }
 182
 183 static void set_vertex_shader( void )
 184 {
 185    FILE *f;
 186    char buf[50000];
 187    void *handle;
 188    int sz;
 189
 190    if ((f = fopen(filename, "r")) == NULL) {
 191       fprintf(stderr, "Couldn't open %s\n", filename);
 192       exit(1);
 193    }
 194
 195    sz = fread(buf, 1, sizeof(buf), f);
 196    if (!feof(f)) {
 197       printf("file too long\n");
 198       exit(1);
 199    }
 200    printf("%.*s\n", sz, buf);
 201    buf[sz] = 0;
 202
 203    handle = graw_parse_vertex_shader(ctx, buf);
 204    ctx->bind_vs_state(ctx, handle);
 205    fclose(f);
 206 }
 207
 208 static void set_fragment_shader( void )
 209 {
 210    void *handle;
 211    const char *text =
 212       "FRAG\n"
 213       "DCL IN[0], COLOR, LINEAR\n"
 214       "DCL OUT[0], COLOR\n"
 215       "  0: MOV OUT[0], IN[0]\n"
 216       "  1: END\n";
 217
 218    handle = graw_parse_fragment_shader(ctx, text);
 219    ctx->bind_fs_state(ctx, handle);
 220 }
 221
 222
 223
 224 static void draw( void )
 225 {
 226    float clear_color[4] = {.1,.3,.5,0};
 227
 228    ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
 229    util_draw_arrays(ctx, PIPE_PRIM_POINTS, 0, Elements(vertices));
 230    ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
 231
 232    graw_save_surface_to_file(ctx, surf, NULL);
 233
 234    screen->flush_frontbuffer(screen, surf, window);
 235 }
 236
 237 #define SIZE 16
 238
 239 static void init_tex( void )
 240 {
 241    struct pipe_sampler_view sv_template;
 242    struct pipe_sampler_state sampler_desc;
 243    struct pipe_resource templat;
 244    struct pipe_box box;
 245    ubyte tex2d[SIZE][SIZE][4];
 246    int s, t;
 247
 248 #if (SIZE != 2)
 249    for (s = 0; s < SIZE; s++) {
 250       for (t = 0; t < SIZE; t++) {
 251          if (0) {
 252             int x = (s ^ t) & 1;
 253             tex2d[t][s][0] = (x) ? 0 : 63;
 254             tex2d[t][s][1] = (x) ? 0 : 128;
 255             tex2d[t][s][2] = 0;
 256             tex2d[t][s][3] = 0xff;
 257          }
 258          else {
 259             int x = ((s ^ t) >> 2) & 1;
 260             tex2d[t][s][0] = s*255/(SIZE-1);
 261             tex2d[t][s][1] = t*255/(SIZE-1);
 262             tex2d[t][s][2] = (x) ? 0 : 128;
 263             tex2d[t][s][3] = 0xff;
 264          }
 265       }
 266    }
 267 #else
 268    tex2d[0][0][0] = 0;
 269    tex2d[0][0][1] = 255;
 270    tex2d[0][0][2] = 255;
 271    tex2d[0][0][3] = 0;
 272
 273    tex2d[0][1][0] = 0;
 274    tex2d[0][1][1] = 0;
 275    tex2d[0][1][2] = 255;
 276    tex2d[0][1][3] = 255;
 277
 278    tex2d[1][0][0] = 255;
 279    tex2d[1][0][1] = 255;
 280    tex2d[1][0][2] = 0;
 281    tex2d[1][0][3] = 255;
 282
 283    tex2d[1][1][0] = 255;
 284    tex2d[1][1][1] = 0;
 285    tex2d[1][1][2] = 0;
 286    tex2d[1][1][3] = 255;
 287 #endif
 288
 289    templat.target = PIPE_TEXTURE_2D;
 290    templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 291    templat.width0 = SIZE;
 292    templat.height0 = SIZE;
 293    templat.depth0 = 1;
 294    templat.last_level = 0;
 295    templat.nr_samples = 1;
 296    templat.bind = PIPE_BIND_SAMPLER_VIEW;
 297
 298
 299    samptex = screen->resource_create(screen,
 300                                  &templat);
 301    if (samptex == NULL)
 302       exit(4);
 303
 304    u_box_2d(0,0,SIZE,SIZE, &box);
 305
 306    ctx->transfer_inline_write(ctx,
 307                               samptex,
 308                               u_subresource(0,0),
 309                               PIPE_TRANSFER_WRITE,
 310                               &box,
 311                               tex2d,
 312                               sizeof tex2d[0],
 313                               sizeof tex2d);
 314
 315    /* Possibly read back & compare against original data:
 316     */
 317    if (0)
 318    {
 319       struct pipe_transfer *t;
 320       uint32_t *ptr;
 321       t = pipe_get_transfer(ctx, samptex,
 322                             0, 0, 0, /* face, level, zslice */
 323                             PIPE_TRANSFER_READ,
 324                             0, 0, SIZE, SIZE); /* x, y, width, height */
 325
 326       ptr = ctx->transfer_map(ctx, t);
 327
 328       if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
 329          assert(0);
 330          exit(9);
 331       }
 332
 333       ctx->transfer_unmap(ctx, t);
 334
 335       ctx->transfer_destroy(ctx, t);
 336    }
 337
 338    memset(&sv_template, 0, sizeof sv_template);
 339    sv_template.format = samptex->format;
 340    sv_template.texture = samptex;
 341    sv_template.first_level = 0;
 342    sv_template.last_level = 0;
 343    sv_template.swizzle_r = 0;
 344    sv_template.swizzle_g = 1;
 345    sv_template.swizzle_b = 2;
 346    sv_template.swizzle_a = 3;
 347    sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
 348    if (sv == NULL)
 349       exit(5);
 350
 351    ctx->set_fragment_sampler_views(ctx, 1, &sv);
 352
 353
 354    memset(&sampler_desc, 0, sizeof sampler_desc);
 355    sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
 356    sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
 357    sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
 358    sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 359    sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 360    sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 361    sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
 362    sampler_desc.compare_func = 0;
 363    sampler_desc.normalized_coords = 1;
 364    sampler_desc.max_anisotropy = 0;
 365
 366    sampler = ctx->create_sampler_state(ctx, &sampler_desc);
 367    if (sampler == NULL)
 368       exit(6);
 369
 370    ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
 371
 372 }
 373
 374 static void init( void )
 375 {
 376    struct pipe_framebuffer_state fb;
 377    struct pipe_resource templat;
 378    int i;
 379
 380    /* It's hard to say whether window or screen should be created
 381     * first.  Different environments would prefer one or the other.
 382     *
 383     * Also, no easy way of querying supported formats if the screen
 384     * cannot be created first.
 385     */
 386    for (i = 0;
 387         window == NULL && formats[i] != PIPE_FORMAT_NONE;
 388         i++) {
 389
 390       screen = graw_create_window_and_screen(0,0,WIDTH,HEIGHT,
 391                                              formats[i],
 392                                              &window);
 393    }
 394
 395    ctx = screen->context_create(screen, NULL);
 396    if (ctx == NULL)
 397       exit(3);
 398
 399    templat.target = PIPE_TEXTURE_2D;
 400    templat.format = formats[i];
 401    templat.width0 = WIDTH;
 402    templat.height0 = HEIGHT;
 403    templat.depth0 = 1;
 404    templat.last_level = 0;
 405    templat.nr_samples = 1;
 406    templat.bind = (PIPE_BIND_RENDER_TARGET |
 407                    PIPE_BIND_DISPLAY_TARGET);
 408
 409    rttex = screen->resource_create(screen,
 410                                  &templat);
 411    if (rttex == NULL)
 412       exit(4);
 413
 414    surf = screen->get_tex_surface(screen, rttex, 0, 0, 0,
 415                                   PIPE_BIND_RENDER_TARGET |
 416                                   PIPE_BIND_DISPLAY_TARGET);
 417    if (surf == NULL)
 418       exit(5);
 419
 420    memset(&fb, 0, sizeof fb);
 421    fb.nr_cbufs = 1;
 422    fb.width = WIDTH;
 423    fb.height = HEIGHT;
 424    fb.cbufs[0] = surf;
 425
 426    ctx->set_framebuffer_state(ctx, &fb);
 427
 428    {
 429       struct pipe_blend_state blend;
 430       void *handle;
 431       memset(&blend, 0, sizeof blend);
 432       blend.rt[0].colormask = PIPE_MASK_RGBA;
 433       handle = ctx->create_blend_state(ctx, &blend);
 434       ctx->bind_blend_state(ctx, handle);
 435    }
 436
 437    {
 438       struct pipe_depth_stencil_alpha_state depthstencil;
 439       void *handle;
 440       memset(&depthstencil, 0, sizeof depthstencil);
 441       handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
 442       ctx->bind_depth_stencil_alpha_state(ctx, handle);
 443    }
 444
 445    {
 446       struct pipe_rasterizer_state rasterizer;
 447       void *handle;
 448       memset(&rasterizer, 0, sizeof rasterizer);
 449       rasterizer.cull_face = PIPE_FACE_NONE;
 450       rasterizer.point_size = 8.0;
 451       rasterizer.gl_rasterization_rules = 1;
 452       handle = ctx->create_rasterizer_state(ctx, &rasterizer);
 453       ctx->bind_rasterizer_state(ctx, handle);
 454    }
 455
 456    set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
 457
 458    init_tex();
 459    init_fs_constbuf();
 460
 461    set_vertices();
 462    set_vertex_shader();
 463    set_fragment_shader();
 464 }
 465
 466 static void args(int argc, char *argv[])
 467 {
 468    int i;
 469
 470    for (i = 1; i < argc;) {
 471       if (graw_parse_args(&i, argc, argv)) {
 472          continue;
 473       }
 474       if (strcmp(argv[i], "-fps") == 0) {
 475          show_fps = 1;
 476          i++;
 477       }
 478       else if (i == argc - 1) {
 479          filename = argv[i];
 480          i++;
 481       }
 482       else {
 483          usage(argv[0]);
 484          exit(1);
 485       }
 486    }
 487
 488    if (!filename) {
 489       usage(argv[0]);
 490       exit(1);
 491    }
 492 }
 493
 494 int main( int argc, char *argv[] )
 495 {
 496    args(argc,argv);
 497    init();
 498
 499    graw_set_display_func( draw );
 500    graw_main_loop();
 501    return 0;
 502 }