src/gallium/tests/graw/quad-sample.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 "util/u_debug.h"       /* debug_dump_surface_bmp() */
  13 #include "util/u_inlines.h"
  14 #include "util/u_memory.h"      /* Offset() */
  15 #include "util/u_draw_quad.h"
  16 #include "util/u_box.h"
  17
  18 #include <stdio.h>
  19
  20 enum pipe_format formats[] = {
  21    PIPE_FORMAT_R8G8B8A8_UNORM,
  22    PIPE_FORMAT_B8G8R8A8_UNORM,
  23    PIPE_FORMAT_NONE
  24 };
  25
  26 static const int WIDTH = 300;
  27 static const int HEIGHT = 300;
  28
  29 static struct pipe_screen *screen = NULL;
  30 static struct pipe_context *ctx = NULL;
  31 static struct pipe_resource *rttex = NULL;
  32 static struct pipe_resource *samptex = NULL;
  33 static struct pipe_surface *surf = NULL;
  34 static struct pipe_sampler_view *sv = NULL;
  35 static void *sampler = NULL;
  36 static void *window = NULL;
  37
  38 struct vertex {
  39    float position[4];
  40    float color[4];
  41 };
  42
  43 static struct vertex vertices[] =
  44 {
  45    { { 0.9, -0.9, 0.0, 1.0 },
  46      { 1, 0, 0, 1 } },
  47
  48    { { 0.9,  0.9, 0.0, 1.0 },
  49      { 1, 1, 0, 1 } },
  50
  51    { {-0.9,  0.9, 0.0, 1.0 },
  52      { 0, 1, 0, 1 } },
  53
  54    { {-0.9,  -0.9, 0.0, 1.0 },
  55      { 0, 0, 0, 1 } },
  56 };
  57
  58
  59
  60
  61 static void set_viewport( float x, float y,
  62                           float width, float height,
  63                           float near, float far)
  64 {
  65    float z = far;
  66    float half_width = (float)width / 2.0f;
  67    float half_height = (float)height / 2.0f;
  68    float half_depth = ((float)far - (float)near) / 2.0f;
  69    struct pipe_viewport_state vp;
  70
  71    vp.scale[0] = half_width;
  72    vp.scale[1] = half_height;
  73    vp.scale[2] = half_depth;
  74    vp.scale[3] = 1.0f;
  75
  76    vp.translate[0] = half_width + x;
  77    vp.translate[1] = half_height + y;
  78    vp.translate[2] = half_depth + z;
  79    vp.translate[3] = 0.0f;
  80
  81    ctx->set_viewport_state( ctx, &vp );
  82 }
  83
  84 static void set_vertices( void )
  85 {
  86    struct pipe_vertex_element ve[2];
  87    struct pipe_vertex_buffer vbuf;
  88    void *handle;
  89
  90    memset(ve, 0, sizeof ve);
  91
  92    ve[0].src_offset = Offset(struct vertex, position);
  93    ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  94    ve[1].src_offset = Offset(struct vertex, color);
  95    ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  96
  97    handle = ctx->create_vertex_elements_state(ctx, 2, ve);
  98    ctx->bind_vertex_elements_state(ctx, handle);
  99
 100
 101    vbuf.stride = sizeof( struct vertex );
 102    vbuf.buffer_offset = 0;
 103    vbuf.buffer = pipe_buffer_create_with_data(ctx,
 104                                               PIPE_BIND_VERTEX_BUFFER,
 105                                               PIPE_USAGE_STATIC,
 106                                               sizeof(vertices),
 107                                               vertices);
 108
 109    ctx->set_vertex_buffers(ctx, 1, &vbuf);
 110 }
 111
 112 static void set_vertex_shader( void )
 113 {
 114    void *handle;
 115    const char *text =
 116       "VERT\n"
 117       "DCL IN[0]\n"
 118       "DCL IN[1]\n"
 119       "DCL OUT[0], POSITION\n"
 120       "DCL OUT[1], GENERIC[0]\n"
 121       "  0: MOV OUT[1], IN[1]\n"
 122       "  1: MOV OUT[0], IN[0]\n"
 123       "  2: END\n";
 124
 125    handle = graw_parse_vertex_shader(ctx, text);
 126    ctx->bind_vs_state(ctx, handle);
 127 }
 128
 129 static void set_fragment_shader( void )
 130 {
 131    void *handle;
 132    const char *text =
 133       "FRAG\n"
 134       "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
 135       "DCL OUT[0], COLOR\n"
 136       "DCL TEMP[0]\n"
 137       "DCL SAMP[0]\n"
 138       "DCL RES[0], 2D, FLOAT\n"
 139       "  0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"
 140       "  1: MOV OUT[0], TEMP[0]\n"
 141       "  2: END\n";
 142
 143    handle = graw_parse_fragment_shader(ctx, text);
 144    ctx->bind_fs_state(ctx, handle);
 145 }
 146
 147
 148 static void draw( void )
 149 {
 150    union pipe_color_union clear_color = { {.5,.5,.5,1} };
 151
 152    ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
 153    util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
 154    ctx->flush(ctx, NULL);
 155
 156    graw_save_surface_to_file(ctx, surf, NULL);
 157
 158    screen->flush_frontbuffer(screen, rttex, 0, 0, window);
 159 }
 160
 161 #define SIZE 16
 162
 163 static void init_tex( void )
 164 {
 165    struct pipe_sampler_view sv_template;
 166    struct pipe_sampler_state sampler_desc;
 167    struct pipe_resource templat;
 168    struct pipe_box box;
 169    ubyte tex2d[SIZE][SIZE][4];
 170    int s, t;
 171
 172 #if (SIZE != 2)
 173    for (s = 0; s < SIZE; s++) {
 174       for (t = 0; t < SIZE; t++) {
 175          if (0) {
 176             int x = (s ^ t) & 1;
 177             tex2d[t][s][0] = (x) ? 0 : 63;
 178             tex2d[t][s][1] = (x) ? 0 : 128;
 179             tex2d[t][s][2] = 0;
 180             tex2d[t][s][3] = 0xff;
 181          }
 182          else {
 183             int x = ((s ^ t) >> 2) & 1;
 184             tex2d[t][s][0] = s*255/(SIZE-1);
 185             tex2d[t][s][1] = t*255/(SIZE-1);
 186             tex2d[t][s][2] = (x) ? 0 : 128;
 187             tex2d[t][s][3] = 0xff;
 188          }
 189       }
 190    }
 191 #else
 192    tex2d[0][0][0] = 0;
 193    tex2d[0][0][1] = 255;
 194    tex2d[0][0][2] = 255;
 195    tex2d[0][0][3] = 0;
 196
 197    tex2d[0][1][0] = 0;
 198    tex2d[0][1][1] = 0;
 199    tex2d[0][1][2] = 255;
 200    tex2d[0][1][3] = 255;
 201
 202    tex2d[1][0][0] = 255;
 203    tex2d[1][0][1] = 255;
 204    tex2d[1][0][2] = 0;
 205    tex2d[1][0][3] = 255;
 206
 207    tex2d[1][1][0] = 255;
 208    tex2d[1][1][1] = 0;
 209    tex2d[1][1][2] = 0;
 210    tex2d[1][1][3] = 255;
 211 #endif
 212
 213    templat.target = PIPE_TEXTURE_2D;
 214    templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 215    templat.width0 = SIZE;
 216    templat.height0 = SIZE;
 217    templat.depth0 = 1;
 218    templat.last_level = 0;
 219    templat.nr_samples = 1;
 220    templat.bind = PIPE_BIND_SAMPLER_VIEW;
 221
 222
 223    samptex = screen->resource_create(screen,
 224                                  &templat);
 225    if (samptex == NULL)
 226       exit(4);
 227
 228    u_box_2d(0,0,SIZE,SIZE, &box);
 229
 230    ctx->transfer_inline_write(ctx,
 231                               samptex,
 232                               0,
 233                               PIPE_TRANSFER_WRITE,
 234                               &box,
 235                               tex2d,
 236                               sizeof tex2d[0],
 237                               sizeof tex2d);
 238
 239    /* Possibly read back & compare against original data:
 240     */
 241    if (0)
 242    {
 243       struct pipe_transfer *t;
 244       uint32_t *ptr;
 245       ptr = pipe_transfer_map(ctx, samptex,
 246                               0, 0, /* level, layer */
 247                               PIPE_TRANSFER_READ,
 248                               0, 0, SIZE, SIZE, &t); /* x, y, width, height */
 249
 250       if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
 251          assert(0);
 252          exit(9);
 253       }
 254
 255       ctx->transfer_unmap(ctx, t);
 256    }
 257
 258    memset(&sv_template, 0, sizeof sv_template);
 259    sv_template.format = samptex->format;
 260    sv_template.texture = samptex;
 261    sv_template.swizzle_r = 0;
 262    sv_template.swizzle_g = 1;
 263    sv_template.swizzle_b = 2;
 264    sv_template.swizzle_a = 3;
 265    sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
 266    if (sv == NULL)
 267       exit(5);
 268
 269    ctx->set_fragment_sampler_views(ctx, 1, &sv);
 270
 271
 272    memset(&sampler_desc, 0, sizeof sampler_desc);
 273    sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
 274    sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
 275    sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
 276    sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 277    sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 278    sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 279    sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
 280    sampler_desc.compare_func = 0;
 281    sampler_desc.normalized_coords = 1;
 282    sampler_desc.max_anisotropy = 0;
 283
 284    sampler = ctx->create_sampler_state(ctx, &sampler_desc);
 285    if (sampler == NULL)
 286       exit(6);
 287
 288    ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
 289
 290 }
 291
 292 static void init( void )
 293 {
 294    struct pipe_framebuffer_state fb;
 295    struct pipe_resource templat;
 296    struct pipe_surface surf_tmpl;
 297    int i;
 298
 299    /* It's hard to say whether window or screen should be created
 300     * first.  Different environments would prefer one or the other.
 301     *
 302     * Also, no easy way of querying supported formats if the screen
 303     * cannot be created first.
 304     */
 305    for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
 306       screen = graw_create_window_and_screen(0, 0, 300, 300,
 307                                              formats[i],
 308                                              &window);
 309       if (window && screen)
 310          break;
 311    }
 312    if (!screen || !window) {
 313       fprintf(stderr, "Unable to create window\n");
 314       exit(1);
 315    }
 316
 317    ctx = screen->context_create(screen, NULL);
 318    if (ctx == NULL)
 319       exit(3);
 320
 321    templat.target = PIPE_TEXTURE_2D;
 322    templat.format = formats[i];
 323    templat.width0 = WIDTH;
 324    templat.height0 = HEIGHT;
 325    templat.depth0 = 1;
 326    templat.array_size = 1;
 327    templat.last_level = 0;
 328    templat.nr_samples = 1;
 329    templat.bind = (PIPE_BIND_RENDER_TARGET |
 330                    PIPE_BIND_DISPLAY_TARGET);
 331
 332    rttex = screen->resource_create(screen,
 333                                  &templat);
 334    if (rttex == NULL)
 335       exit(4);
 336
 337    surf_tmpl.format = templat.format;
 338    surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
 339    surf_tmpl.u.tex.level = 0;
 340    surf_tmpl.u.tex.first_layer = 0;
 341    surf_tmpl.u.tex.last_layer = 0;
 342    surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
 343    if (surf == NULL)
 344       exit(5);
 345
 346    memset(&fb, 0, sizeof fb);
 347    fb.nr_cbufs = 1;
 348    fb.width = WIDTH;
 349    fb.height = HEIGHT;
 350    fb.cbufs[0] = surf;
 351
 352    ctx->set_framebuffer_state(ctx, &fb);
 353
 354    {
 355       struct pipe_blend_state blend;
 356       void *handle;
 357       memset(&blend, 0, sizeof blend);
 358       blend.rt[0].colormask = PIPE_MASK_RGBA;
 359       handle = ctx->create_blend_state(ctx, &blend);
 360       ctx->bind_blend_state(ctx, handle);
 361    }
 362
 363    {
 364       struct pipe_depth_stencil_alpha_state depthstencil;
 365       void *handle;
 366       memset(&depthstencil, 0, sizeof depthstencil);
 367       handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
 368       ctx->bind_depth_stencil_alpha_state(ctx, handle);
 369    }
 370
 371    {
 372       struct pipe_rasterizer_state rasterizer;
 373       void *handle;
 374       memset(&rasterizer, 0, sizeof rasterizer);
 375       rasterizer.cull_face = PIPE_FACE_NONE;
 376       rasterizer.gl_rasterization_rules = 1;
 377       rasterizer.depth_clip = 1;
 378       handle = ctx->create_rasterizer_state(ctx, &rasterizer);
 379       ctx->bind_rasterizer_state(ctx, handle);
 380    }
 381
 382    set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
 383
 384    init_tex();
 385
 386    set_vertices();
 387    set_vertex_shader();
 388    set_fragment_shader();
 389 }
 390
 391 static void args(int argc, char *argv[])
 392 {
 393    int i;
 394
 395    for (i = 1; i < argc;) {
 396       if (graw_parse_args(&i, argc, argv)) {
 397          continue;
 398       }
 399       exit(1);
 400    }
 401 }
 402
 403
 404 int main( int argc, char *argv[] )
 405 {
 406    args(argc, argv);
 407    init();
 408
 409    graw_set_display_func( draw );
 410    graw_main_loop();
 411    return 0;
 412 }