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_RGBA8888_UNORM,
  22    PIPE_FORMAT_BGRA8888_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 zNear, float zFar)
  64 {
  65    float z = zFar;
  66    float half_width = (float)width / 2.0f;
  67    float half_height = (float)height / 2.0f;
  68    float half_depth = ((float)zFar - (float)zNear) / 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
  75    vp.translate[0] = half_width + x;
  76    vp.translate[1] = half_height + y;
  77    vp.translate[2] = half_depth + z;
  78
  79    ctx->set_viewport_states( ctx, 0, 1, &vp );
  80 }
  81
  82 static void set_vertices( void )
  83 {
  84    struct pipe_vertex_element ve[2];
  85    struct pipe_vertex_buffer vbuf;
  86    void *handle;
  87
  88    memset(ve, 0, sizeof ve);
  89
  90    ve[0].src_offset = Offset(struct vertex, position);
  91    ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  92    ve[1].src_offset = Offset(struct vertex, color);
  93    ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  94
  95    handle = ctx->create_vertex_elements_state(ctx, 2, ve);
  96    ctx->bind_vertex_elements_state(ctx, handle);
  97
  98    memset(&vbuf, 0, sizeof vbuf);
  99
 100    vbuf.stride = sizeof( struct vertex );
 101    vbuf.buffer_offset = 0;
 102    vbuf.buffer = pipe_buffer_create_with_data(ctx,
 103                                               PIPE_BIND_VERTEX_BUFFER,
 104                                               PIPE_USAGE_DEFAULT,
 105                                               sizeof(vertices),
 106                                               vertices);
 107
 108    ctx->set_vertex_buffers(ctx, 0, 1, &vbuf);
 109 }
 110
 111 static void set_vertex_shader( void )
 112 {
 113    void *handle;
 114    const char *text =
 115       "VERT\n"
 116       "DCL IN[0]\n"
 117       "DCL IN[1]\n"
 118       "DCL OUT[0], POSITION\n"
 119       "DCL OUT[1], GENERIC[0]\n"
 120       "  0: MOV OUT[1], IN[1]\n"
 121       "  1: MOV OUT[0], IN[0]\n"
 122       "  2: END\n";
 123
 124    handle = graw_parse_vertex_shader(ctx, text);
 125    ctx->bind_vs_state(ctx, handle);
 126 }
 127
 128 static void set_fragment_shader( void )
 129 {
 130    void *handle;
 131    const char *text =
 132       "FRAG\n"
 133       "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
 134       "DCL OUT[0], COLOR\n"
 135       "DCL TEMP[0]\n"
 136       "DCL SAMP[0]\n"
 137       "DCL RES[0], 2D, FLOAT\n"
 138       "  0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"
 139       "  1: MOV OUT[0], TEMP[0]\n"
 140       "  2: END\n";
 141
 142    handle = graw_parse_fragment_shader(ctx, text);
 143    ctx->bind_fs_state(ctx, handle);
 144 }
 145
 146
 147 static void draw( void )
 148 {
 149    union pipe_color_union clear_color = { {.5,.5,.5,1} };
 150
 151    ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
 152    util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
 153    ctx->flush(ctx, NULL, 0);
 154
 155    graw_save_surface_to_file(ctx, surf, NULL);
 156
 157    screen->flush_frontbuffer(screen, rttex, 0, 0, window, NULL);
 158 }
 159
 160 #define SIZE 16
 161
 162 static void init_tex( void )
 163 {
 164    struct pipe_sampler_view sv_template;
 165    struct pipe_sampler_state sampler_desc;
 166    struct pipe_resource templat;
 167    struct pipe_box box;
 168    ubyte tex2d[SIZE][SIZE][4];
 169    int s, t;
 170
 171 #if (SIZE != 2)
 172    for (s = 0; s < SIZE; s++) {
 173       for (t = 0; t < SIZE; t++) {
 174          if (0) {
 175             int x = (s ^ t) & 1;
 176             tex2d[t][s][0] = (x) ? 0 : 63;
 177             tex2d[t][s][1] = (x) ? 0 : 128;
 178             tex2d[t][s][2] = 0;
 179             tex2d[t][s][3] = 0xff;
 180          }
 181          else {
 182             int x = ((s ^ t) >> 2) & 1;
 183             tex2d[t][s][0] = s*255/(SIZE-1);
 184             tex2d[t][s][1] = t*255/(SIZE-1);
 185             tex2d[t][s][2] = (x) ? 0 : 128;
 186             tex2d[t][s][3] = 0xff;
 187          }
 188       }
 189    }
 190 #else
 191    tex2d[0][0][0] = 0;
 192    tex2d[0][0][1] = 255;
 193    tex2d[0][0][2] = 255;
 194    tex2d[0][0][3] = 0;
 195
 196    tex2d[0][1][0] = 0;
 197    tex2d[0][1][1] = 0;
 198    tex2d[0][1][2] = 255;
 199    tex2d[0][1][3] = 255;
 200
 201    tex2d[1][0][0] = 255;
 202    tex2d[1][0][1] = 255;
 203    tex2d[1][0][2] = 0;
 204    tex2d[1][0][3] = 255;
 205
 206    tex2d[1][1][0] = 255;
 207    tex2d[1][1][1] = 0;
 208    tex2d[1][1][2] = 0;
 209    tex2d[1][1][3] = 255;
 210 #endif
 211
 212    templat.target = PIPE_TEXTURE_2D;
 213    templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 214    templat.width0 = SIZE;
 215    templat.height0 = SIZE;
 216    templat.depth0 = 1;
 217    templat.last_level = 0;
 218    templat.nr_samples = 1;
 219    templat.bind = PIPE_BIND_SAMPLER_VIEW;
 220
 221
 222    samptex = screen->resource_create(screen,
 223                                  &templat);
 224    if (samptex == NULL)
 225       exit(4);
 226
 227    u_box_2d(0,0,SIZE,SIZE, &box);
 228
 229    ctx->transfer_inline_write(ctx,
 230                               samptex,
 231                               0,
 232                               PIPE_TRANSFER_WRITE,
 233                               &box,
 234                               tex2d,
 235                               sizeof tex2d[0],
 236                               sizeof tex2d);
 237
 238    /* Possibly read back & compare against original data:
 239     */
 240    if (0)
 241    {
 242       struct pipe_transfer *t;
 243       uint32_t *ptr;
 244       ptr = pipe_transfer_map(ctx, samptex,
 245                               0, 0, /* level, layer */
 246                               PIPE_TRANSFER_READ,
 247                               0, 0, SIZE, SIZE, &t); /* x, y, width, height */
 248
 249       if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
 250          assert(0);
 251          exit(9);
 252       }
 253
 254       ctx->transfer_unmap(ctx, t);
 255    }
 256
 257    memset(&sv_template, 0, sizeof sv_template);
 258    sv_template.format = samptex->format;
 259    sv_template.texture = samptex;
 260    sv_template.swizzle_r = 0;
 261    sv_template.swizzle_g = 1;
 262    sv_template.swizzle_b = 2;
 263    sv_template.swizzle_a = 3;
 264    sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
 265    if (sv == NULL)
 266       exit(5);
 267
 268    ctx->set_sampler_views(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
 269
 270
 271    memset(&sampler_desc, 0, sizeof sampler_desc);
 272    sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
 273    sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
 274    sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
 275    sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 276    sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 277    sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 278    sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
 279    sampler_desc.compare_func = 0;
 280    sampler_desc.normalized_coords = 1;
 281    sampler_desc.max_anisotropy = 0;
 282
 283    sampler = ctx->create_sampler_state(ctx, &sampler_desc);
 284    if (sampler == NULL)
 285       exit(6);
 286
 287    ctx->bind_sampler_states(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sampler);
 288
 289 }
 290
 291 static void init( void )
 292 {
 293    struct pipe_framebuffer_state fb;
 294    struct pipe_resource templat;
 295    struct pipe_surface surf_tmpl;
 296    int i;
 297
 298    /* It's hard to say whether window or screen should be created
 299     * first.  Different environments would prefer one or the other.
 300     *
 301     * Also, no easy way of querying supported formats if the screen
 302     * cannot be created first.
 303     */
 304    for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
 305       screen = graw_create_window_and_screen(0, 0, 300, 300,
 306                                              formats[i],
 307                                              &window);
 308       if (window && screen)
 309          break;
 310    }
 311    if (!screen || !window) {
 312       fprintf(stderr, "Unable to create window\n");
 313       exit(1);
 314    }
 315
 316    ctx = screen->context_create(screen, NULL);
 317    if (ctx == NULL)
 318       exit(3);
 319
 320    templat.target = PIPE_TEXTURE_2D;
 321    templat.format = formats[i];
 322    templat.width0 = WIDTH;
 323    templat.height0 = HEIGHT;
 324    templat.depth0 = 1;
 325    templat.array_size = 1;
 326    templat.last_level = 0;
 327    templat.nr_samples = 1;
 328    templat.bind = (PIPE_BIND_RENDER_TARGET |
 329                    PIPE_BIND_DISPLAY_TARGET);
 330
 331    rttex = screen->resource_create(screen,
 332                                  &templat);
 333    if (rttex == NULL)
 334       exit(4);
 335
 336    surf_tmpl.format = templat.format;
 337    surf_tmpl.u.tex.level = 0;
 338    surf_tmpl.u.tex.first_layer = 0;
 339    surf_tmpl.u.tex.last_layer = 0;
 340    surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
 341    if (surf == NULL)
 342       exit(5);
 343
 344    memset(&fb, 0, sizeof fb);
 345    fb.nr_cbufs = 1;
 346    fb.width = WIDTH;
 347    fb.height = HEIGHT;
 348    fb.cbufs[0] = surf;
 349
 350    ctx->set_framebuffer_state(ctx, &fb);
 351
 352    {
 353       struct pipe_blend_state blend;
 354       void *handle;
 355       memset(&blend, 0, sizeof blend);
 356       blend.rt[0].colormask = PIPE_MASK_RGBA;
 357       handle = ctx->create_blend_state(ctx, &blend);
 358       ctx->bind_blend_state(ctx, handle);
 359    }
 360
 361    {
 362       struct pipe_depth_stencil_alpha_state depthstencil;
 363       void *handle;
 364       memset(&depthstencil, 0, sizeof depthstencil);
 365       handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
 366       ctx->bind_depth_stencil_alpha_state(ctx, handle);
 367    }
 368
 369    {
 370       struct pipe_rasterizer_state rasterizer;
 371       void *handle;
 372       memset(&rasterizer, 0, sizeof rasterizer);
 373       rasterizer.cull_face = PIPE_FACE_NONE;
 374       rasterizer.half_pixel_center = 1;
 375       rasterizer.bottom_edge_rule = 1;
 376       rasterizer.depth_clip = 1;
 377       handle = ctx->create_rasterizer_state(ctx, &rasterizer);
 378       ctx->bind_rasterizer_state(ctx, handle);
 379    }
 380
 381    set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
 382
 383    init_tex();
 384
 385    set_vertices();
 386    set_vertex_shader();
 387    set_fragment_shader();
 388 }
 389
 390 static void args(int argc, char *argv[])
 391 {
 392    int i;
 393
 394    for (i = 1; i < argc;) {
 395       if (graw_parse_args(&i, argc, argv)) {
 396          continue;
 397       }
 398       exit(1);
 399    }
 400 }
 401
 402
 403 int main( int argc, char *argv[] )
 404 {
 405    args(argc, argv);
 406    init();
 407
 408    graw_set_display_func( draw );
 409    graw_main_loop();
 410    return 0;
 411 }