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_RGBA8888_UNORM,
  36    PIPE_FORMAT_BGRA8888_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.array_size = 1;
  91    templat.last_level = 0;
  92    templat.nr_samples = 1;
  93    templat.bind = PIPE_BIND_CONSTANT_BUFFER;
  94
  95    constbuf = screen->resource_create(screen,
  96                                       &templat);
  97    if (constbuf == NULL)
  98       exit(4);
  99
 100
 101    u_box_2d(0,0,sizeof(constants),1, &box);
 102
 103    ctx->transfer_inline_write(ctx,
 104                               constbuf,
 105                               0,
 106                               PIPE_TRANSFER_WRITE,
 107                               &box,
 108                               constants,
 109                               sizeof constants,
 110                               sizeof constants);
 111
 112
 113    pipe_set_constant_buffer(ctx,
 114                             PIPE_SHADER_VERTEX, 0,
 115                             constbuf);
 116 }
 117
 118
 119 static void set_viewport( float x, float y,
 120                           float width, float height,
 121                           float zNear, float zFar)
 122 {
 123    float z = zFar;
 124    float half_width = (float)width / 2.0f;
 125    float half_height = (float)height / 2.0f;
 126    float half_depth = ((float)zFar - (float)zNear) / 2.0f;
 127    struct pipe_viewport_state vp;
 128
 129    vp.scale[0] = half_width;
 130    vp.scale[1] = half_height;
 131    vp.scale[2] = half_depth;
 132
 133    vp.translate[0] = half_width + x;
 134    vp.translate[1] = half_height + y;
 135    vp.translate[2] = half_depth + z;
 136
 137    ctx->set_viewport_states( ctx, 0, 1, &vp );
 138 }
 139
 140 static void set_vertices( void )
 141 {
 142    struct pipe_vertex_element ve[2];
 143    struct pipe_vertex_buffer vbuf;
 144    void *handle;
 145    int x,y;
 146
 147    memset(ve, 0, sizeof ve);
 148
 149    ve[0].src_offset = Offset(struct vertex, position);
 150    ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 151    ve[1].src_offset = Offset(struct vertex, color);
 152    ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 153
 154    handle = ctx->create_vertex_elements_state(ctx, 2, ve);
 155    ctx->bind_vertex_elements_state(ctx, handle);
 156
 157    for (x = 0; x < MESH_SZ; x++) {
 158       for (y = 0; y < MESH_SZ; y++) {
 159          int i = y * MESH_SZ + x;
 160          vertices[i].position[0] = ((float)x)/MESH_SZ * 2.0 - 1.0;
 161          vertices[i].position[1] = ((float)y)/MESH_SZ * 2.0 - 1.0;
 162          vertices[i].position[2] = 0;
 163          vertices[i].position[3] = 1.0;
 164
 165          vertices[i].color[0] = .5;
 166          vertices[i].color[1] = (float)x / (float)MESH_SZ;
 167          vertices[i].color[2] = (float)y / (float)MESH_SZ;
 168       }
 169    }
 170
 171    memset(&vbuf, 0, sizeof vbuf);
 172
 173    vbuf.stride = sizeof( struct vertex );
 174    vbuf.buffer_offset = 0;
 175    vbuf.buffer = pipe_buffer_create_with_data(ctx,
 176                                               PIPE_BIND_VERTEX_BUFFER,
 177                                               PIPE_USAGE_DEFAULT,
 178                                               sizeof(vertices),
 179                                               vertices);
 180
 181    ctx->set_vertex_buffers(ctx, 0, 1, &vbuf);
 182 }
 183
 184 static void set_vertex_shader( void )
 185 {
 186    FILE *f;
 187    char buf[50000];
 188    void *handle;
 189    int sz;
 190
 191    if ((f = fopen(filename, "r")) == NULL) {
 192       fprintf(stderr, "Couldn't open %s\n", filename);
 193       exit(1);
 194    }
 195
 196    sz = fread(buf, 1, sizeof(buf), f);
 197    if (!feof(f)) {
 198       printf("file too long\n");
 199       exit(1);
 200    }
 201    printf("%.*s\n", sz, buf);
 202    buf[sz] = 0;
 203
 204    handle = graw_parse_vertex_shader(ctx, buf);
 205    ctx->bind_vs_state(ctx, handle);
 206    fclose(f);
 207 }
 208
 209 static void set_fragment_shader( void )
 210 {
 211    void *handle;
 212    const char *text =
 213       "FRAG\n"
 214       "DCL IN[0], COLOR, LINEAR\n"
 215       "DCL OUT[0], COLOR\n"
 216       "  0: MOV OUT[0], IN[0]\n"
 217       "  1: END\n";
 218
 219    handle = graw_parse_fragment_shader(ctx, text);
 220    ctx->bind_fs_state(ctx, handle);
 221 }
 222
 223
 224
 225 static void draw( void )
 226 {
 227    union pipe_color_union clear_color = { {.1,.3,.5,0} };
 228
 229    ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
 230    util_draw_arrays(ctx, PIPE_PRIM_POINTS, 0, Elements(vertices));
 231    ctx->flush(ctx, NULL, 0);
 232
 233    graw_save_surface_to_file(ctx, surf, NULL);
 234
 235    screen->flush_frontbuffer(screen, rttex, 0, 0, window, NULL);
 236 }
 237
 238 #define SIZE 16
 239
 240 static void init_tex( void )
 241 {
 242    struct pipe_sampler_view sv_template;
 243    struct pipe_sampler_state sampler_desc;
 244    struct pipe_resource templat;
 245    struct pipe_box box;
 246    ubyte tex2d[SIZE][SIZE][4];
 247    int s, t;
 248
 249 #if (SIZE != 2)
 250    for (s = 0; s < SIZE; s++) {
 251       for (t = 0; t < SIZE; t++) {
 252          if (0) {
 253             int x = (s ^ t) & 1;
 254             tex2d[t][s][0] = (x) ? 0 : 63;
 255             tex2d[t][s][1] = (x) ? 0 : 128;
 256             tex2d[t][s][2] = 0;
 257             tex2d[t][s][3] = 0xff;
 258          }
 259          else {
 260             int x = ((s ^ t) >> 2) & 1;
 261             tex2d[t][s][0] = s*255/(SIZE-1);
 262             tex2d[t][s][1] = t*255/(SIZE-1);
 263             tex2d[t][s][2] = (x) ? 0 : 128;
 264             tex2d[t][s][3] = 0xff;
 265          }
 266       }
 267    }
 268 #else
 269    tex2d[0][0][0] = 0;
 270    tex2d[0][0][1] = 255;
 271    tex2d[0][0][2] = 255;
 272    tex2d[0][0][3] = 0;
 273
 274    tex2d[0][1][0] = 0;
 275    tex2d[0][1][1] = 0;
 276    tex2d[0][1][2] = 255;
 277    tex2d[0][1][3] = 255;
 278
 279    tex2d[1][0][0] = 255;
 280    tex2d[1][0][1] = 255;
 281    tex2d[1][0][2] = 0;
 282    tex2d[1][0][3] = 255;
 283
 284    tex2d[1][1][0] = 255;
 285    tex2d[1][1][1] = 0;
 286    tex2d[1][1][2] = 0;
 287    tex2d[1][1][3] = 255;
 288 #endif
 289
 290    templat.target = PIPE_TEXTURE_2D;
 291    templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 292    templat.width0 = SIZE;
 293    templat.height0 = SIZE;
 294    templat.depth0 = 1;
 295    templat.array_size = 1;
 296    templat.last_level = 0;
 297    templat.nr_samples = 1;
 298    templat.bind = PIPE_BIND_SAMPLER_VIEW;
 299
 300
 301    samptex = screen->resource_create(screen,
 302                                  &templat);
 303    if (samptex == NULL)
 304       exit(4);
 305
 306    u_box_2d(0,0,SIZE,SIZE, &box);
 307
 308    ctx->transfer_inline_write(ctx,
 309                               samptex,
 310                               0,
 311                               PIPE_TRANSFER_WRITE,
 312                               &box,
 313                               tex2d,
 314                               sizeof tex2d[0],
 315                               sizeof tex2d);
 316
 317    /* Possibly read back & compare against original data:
 318     */
 319    if (0)
 320    {
 321       struct pipe_transfer *t;
 322       uint32_t *ptr;
 323       ptr = pipe_transfer_map(ctx, samptex,
 324                               0, 0, /* level, layer */
 325                               PIPE_TRANSFER_READ,
 326                               0, 0, SIZE, SIZE, &t); /* x, y, width, height */
 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
 336    memset(&sv_template, 0, sizeof sv_template);
 337    sv_template.format = samptex->format;
 338    sv_template.texture = samptex;
 339    sv_template.swizzle_r = 0;
 340    sv_template.swizzle_g = 1;
 341    sv_template.swizzle_b = 2;
 342    sv_template.swizzle_a = 3;
 343    sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
 344    if (sv == NULL)
 345       exit(5);
 346
 347    ctx->set_sampler_views(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
 348
 349
 350    memset(&sampler_desc, 0, sizeof sampler_desc);
 351    sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
 352    sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
 353    sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
 354    sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 355    sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 356    sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 357    sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
 358    sampler_desc.compare_func = 0;
 359    sampler_desc.normalized_coords = 1;
 360    sampler_desc.max_anisotropy = 0;
 361
 362    sampler = ctx->create_sampler_state(ctx, &sampler_desc);
 363    if (sampler == NULL)
 364       exit(6);
 365
 366    ctx->bind_sampler_states(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sampler);
 367
 368 }
 369
 370 static void init( void )
 371 {
 372    struct pipe_framebuffer_state fb;
 373    struct pipe_resource templat;
 374    struct pipe_surface surf_tmpl;
 375    int i;
 376
 377    /* It's hard to say whether window or screen should be created
 378     * first.  Different environments would prefer one or the other.
 379     *
 380     * Also, no easy way of querying supported formats if the screen
 381     * cannot be created first.
 382     */
 383    for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
 384       screen = graw_create_window_and_screen(0, 0, 300, 300,
 385                                              formats[i],
 386                                              &window);
 387       if (window && screen)
 388          break;
 389    }
 390    if (!screen || !window) {
 391       fprintf(stderr, "Unable to create window\n");
 392       exit(1);
 393    }
 394
 395    ctx = screen->context_create(screen, NULL, 0);
 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.array_size = 1;
 405    templat.last_level = 0;
 406    templat.nr_samples = 1;
 407    templat.bind = (PIPE_BIND_RENDER_TARGET |
 408                    PIPE_BIND_DISPLAY_TARGET);
 409
 410    rttex = screen->resource_create(screen,
 411                                  &templat);
 412    if (rttex == NULL)
 413       exit(4);
 414
 415    surf_tmpl.format = templat.format;
 416    surf_tmpl.u.tex.level = 0;
 417    surf_tmpl.u.tex.first_layer = 0;
 418    surf_tmpl.u.tex.last_layer = 0;
 419    surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
 420    if (surf == NULL)
 421       exit(5);
 422
 423    memset(&fb, 0, sizeof fb);
 424    fb.nr_cbufs = 1;
 425    fb.width = WIDTH;
 426    fb.height = HEIGHT;
 427    fb.cbufs[0] = surf;
 428
 429    ctx->set_framebuffer_state(ctx, &fb);
 430
 431    {
 432       struct pipe_blend_state blend;
 433       void *handle;
 434       memset(&blend, 0, sizeof blend);
 435       blend.rt[0].colormask = PIPE_MASK_RGBA;
 436       handle = ctx->create_blend_state(ctx, &blend);
 437       ctx->bind_blend_state(ctx, handle);
 438    }
 439
 440    {
 441       struct pipe_depth_stencil_alpha_state depthstencil;
 442       void *handle;
 443       memset(&depthstencil, 0, sizeof depthstencil);
 444       handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
 445       ctx->bind_depth_stencil_alpha_state(ctx, handle);
 446    }
 447
 448    {
 449       struct pipe_rasterizer_state rasterizer;
 450       void *handle;
 451       memset(&rasterizer, 0, sizeof rasterizer);
 452       rasterizer.cull_face = PIPE_FACE_NONE;
 453       rasterizer.point_size = 8.0;
 454       rasterizer.half_pixel_center = 1;
 455       rasterizer.bottom_edge_rule = 1;
 456       rasterizer.depth_clip = 1;
 457       handle = ctx->create_rasterizer_state(ctx, &rasterizer);
 458       ctx->bind_rasterizer_state(ctx, handle);
 459    }
 460
 461    set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
 462
 463    init_tex();
 464    init_fs_constbuf();
 465
 466    set_vertices();
 467    set_vertex_shader();
 468    set_fragment_shader();
 469 }
 470
 471 static void args(int argc, char *argv[])
 472 {
 473    int i;
 474
 475    for (i = 1; i < argc;) {
 476       if (graw_parse_args(&i, argc, argv)) {
 477          continue;
 478       }
 479       if (strcmp(argv[i], "-fps") == 0) {
 480          show_fps = 1;
 481          i++;
 482       }
 483       else if (i == argc - 1) {
 484          filename = argv[i];
 485          i++;
 486       }
 487       else {
 488          usage(argv[0]);
 489          exit(1);
 490       }
 491    }
 492
 493    if (!filename) {
 494       usage(argv[0]);
 495       exit(1);
 496    }
 497 }
 498
 499 int main( int argc, char *argv[] )
 500 {
 501    args(argc,argv);
 502    init();
 503
 504    graw_set_display_func( draw );
 505    graw_main_loop();
 506    return 0;
 507 }