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.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    ctx->set_constant_buffer(ctx,
 114                             PIPE_SHADER_FRAGMENT, 0,
 115                             constbuf);
 116 }
 117
 118
 119 static void set_viewport( float x, float y,
 120                           float width, float height,
 121                           float near, float far)
 122 {
 123    float z = far;
 124    float half_width = (float)width / 2.0f;
 125    float half_height = (float)height / 2.0f;
 126    float half_depth = ((float)far - (float)near) / 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    vp.scale[3] = 1.0f;
 133
 134    vp.translate[0] = half_width + x;
 135    vp.translate[1] = half_height + y;
 136    vp.translate[2] = half_depth + z;
 137    vp.translate[3] = 0.0f;
 138
 139    ctx->set_viewport_state( ctx, &vp );
 140 }
 141
 142 static void set_vertices( void )
 143 {
 144    struct pipe_vertex_element ve[2];
 145    struct pipe_vertex_buffer vbuf;
 146    void *handle;
 147    int x,y;
 148
 149    memset(ve, 0, sizeof ve);
 150
 151    ve[0].src_offset = Offset(struct vertex, position);
 152    ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 153    ve[1].src_offset = Offset(struct vertex, color);
 154    ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 155
 156    handle = ctx->create_vertex_elements_state(ctx, 2, ve);
 157    ctx->bind_vertex_elements_state(ctx, handle);
 158
 159    for (x = 0; x < MESH_SZ; x++) {
 160       for (y = 0; y < MESH_SZ; y++) {
 161          int i = y * MESH_SZ + x;
 162          vertices[i].position[0] = ((float)x)/MESH_SZ * 2.0 - 1.0;
 163          vertices[i].position[1] = ((float)y)/MESH_SZ * 2.0 - 1.0;
 164          vertices[i].position[2] = 0;
 165          vertices[i].position[3] = 1.0;
 166
 167          vertices[i].color[0] = .5;
 168          vertices[i].color[1] = (float)x / (float)MESH_SZ;
 169          vertices[i].color[2] = (float)y / (float)MESH_SZ;
 170       }
 171    }
 172
 173    vbuf.stride = sizeof( struct vertex );
 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, rttex, 0, 0, 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.array_size = 1;
 295    templat.last_level = 0;
 296    templat.nr_samples = 1;
 297    templat.bind = PIPE_BIND_SAMPLER_VIEW;
 298
 299
 300    samptex = screen->resource_create(screen,
 301                                  &templat);
 302    if (samptex == NULL)
 303       exit(4);
 304
 305    u_box_2d(0,0,SIZE,SIZE, &box);
 306
 307    ctx->transfer_inline_write(ctx,
 308                               samptex,
 309                               0,
 310                               PIPE_TRANSFER_WRITE,
 311                               &box,
 312                               tex2d,
 313                               sizeof tex2d[0],
 314                               sizeof tex2d);
 315
 316    /* Possibly read back & compare against original data:
 317     */
 318    if (0)
 319    {
 320       struct pipe_transfer *t;
 321       uint32_t *ptr;
 322       t = pipe_get_transfer(ctx, samptex,
 323                             0, 0, /* level, layer */
 324                             PIPE_TRANSFER_READ,
 325                             0, 0, SIZE, SIZE); /* x, y, width, height */
 326
 327       ptr = ctx->transfer_map(ctx, t);
 328
 329       if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
 330          assert(0);
 331          exit(9);
 332       }
 333
 334       ctx->transfer_unmap(ctx, t);
 335
 336       ctx->transfer_destroy(ctx, t);
 337    }
 338
 339    memset(&sv_template, 0, sizeof sv_template);
 340    sv_template.format = samptex->format;
 341    sv_template.texture = samptex;
 342    sv_template.swizzle_r = 0;
 343    sv_template.swizzle_g = 1;
 344    sv_template.swizzle_b = 2;
 345    sv_template.swizzle_a = 3;
 346    sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
 347    if (sv == NULL)
 348       exit(5);
 349
 350    ctx->set_fragment_sampler_views(ctx, 1, &sv);
 351
 352
 353    memset(&sampler_desc, 0, sizeof sampler_desc);
 354    sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
 355    sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
 356    sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
 357    sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 358    sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 359    sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 360    sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
 361    sampler_desc.compare_func = 0;
 362    sampler_desc.normalized_coords = 1;
 363    sampler_desc.max_anisotropy = 0;
 364
 365    sampler = ctx->create_sampler_state(ctx, &sampler_desc);
 366    if (sampler == NULL)
 367       exit(6);
 368
 369    ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
 370
 371 }
 372
 373 static void init( void )
 374 {
 375    struct pipe_framebuffer_state fb;
 376    struct pipe_resource templat;
 377    struct pipe_surface surf_tmpl;
 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; formats[i] != PIPE_FORMAT_NONE; i++) {
 387       screen = graw_create_window_and_screen(0, 0, 300, 300,
 388                                              formats[i],
 389                                              &window);
 390       if (window && screen)
 391          break;
 392    }
 393    if (!screen || !window) {
 394       fprintf(stderr, "Unable to create window\n");
 395       exit(1);
 396    }
 397
 398    ctx = screen->context_create(screen, NULL);
 399    if (ctx == NULL)
 400       exit(3);
 401
 402    templat.target = PIPE_TEXTURE_2D;
 403    templat.format = formats[i];
 404    templat.width0 = WIDTH;
 405    templat.height0 = HEIGHT;
 406    templat.depth0 = 1;
 407    templat.array_size = 1;
 408    templat.last_level = 0;
 409    templat.nr_samples = 1;
 410    templat.bind = (PIPE_BIND_RENDER_TARGET |
 411                    PIPE_BIND_DISPLAY_TARGET);
 412
 413    rttex = screen->resource_create(screen,
 414                                  &templat);
 415    if (rttex == NULL)
 416       exit(4);
 417
 418    surf_tmpl.format = templat.format;
 419    surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
 420    surf_tmpl.u.tex.level = 0;
 421    surf_tmpl.u.tex.first_layer = 0;
 422    surf_tmpl.u.tex.last_layer = 0;
 423    surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
 424    if (surf == NULL)
 425       exit(5);
 426
 427    memset(&fb, 0, sizeof fb);
 428    fb.nr_cbufs = 1;
 429    fb.width = WIDTH;
 430    fb.height = HEIGHT;
 431    fb.cbufs[0] = surf;
 432
 433    ctx->set_framebuffer_state(ctx, &fb);
 434
 435    {
 436       struct pipe_blend_state blend;
 437       void *handle;
 438       memset(&blend, 0, sizeof blend);
 439       blend.rt[0].colormask = PIPE_MASK_RGBA;
 440       handle = ctx->create_blend_state(ctx, &blend);
 441       ctx->bind_blend_state(ctx, handle);
 442    }
 443
 444    {
 445       struct pipe_depth_stencil_alpha_state depthstencil;
 446       void *handle;
 447       memset(&depthstencil, 0, sizeof depthstencil);
 448       handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
 449       ctx->bind_depth_stencil_alpha_state(ctx, handle);
 450    }
 451
 452    {
 453       struct pipe_rasterizer_state rasterizer;
 454       void *handle;
 455       memset(&rasterizer, 0, sizeof rasterizer);
 456       rasterizer.cull_face = PIPE_FACE_NONE;
 457       rasterizer.point_size = 8.0;
 458       rasterizer.gl_rasterization_rules = 1;
 459       handle = ctx->create_rasterizer_state(ctx, &rasterizer);
 460       ctx->bind_rasterizer_state(ctx, handle);
 461    }
 462
 463    set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
 464
 465    init_tex();
 466    init_fs_constbuf();
 467
 468    set_vertices();
 469    set_vertex_shader();
 470    set_fragment_shader();
 471 }
 472
 473 static void args(int argc, char *argv[])
 474 {
 475    int i;
 476
 477    for (i = 1; i < argc;) {
 478       if (graw_parse_args(&i, argc, argv)) {
 479          continue;
 480       }
 481       if (strcmp(argv[i], "-fps") == 0) {
 482          show_fps = 1;
 483          i++;
 484       }
 485       else if (i == argc - 1) {
 486          filename = argv[i];
 487          i++;
 488       }
 489       else {
 490          usage(argv[0]);
 491          exit(1);
 492       }
 493    }
 494
 495    if (!filename) {
 496       usage(argv[0]);
 497       exit(1);
 498    }
 499 }
 500
 501 int main( int argc, char *argv[] )
 502 {
 503    args(argc,argv);
 504    init();
 505
 506    graw_set_display_func( draw );
 507    graw_main_loop();
 508    return 0;
 509 }