render.h

   1 /*
   2  * Copyright (C) 2021-2022 Mt.ZERO Software, Harry Godden - All Rights Reserved
   3  */
   4
   5 #include "common.h"
   6 #include "model.h"
   7 #include "camera.h"
   8 #include "world.h"
   9
  10 #include "shaders/blit.h"
  11 #include "shaders/blitblur.h"
  12 #include "shaders/blitcolour.h"
  13
  14 #if 0
  15 #include "shaders/standard.h"
  16 #include "shaders/vblend.h"
  17 #endif
  18
  19 VG_STATIC void render_water_texture( world_instance *world, camera *cam );
  20 VG_STATIC void render_water_surface( world_instance *world, camera *cam );
  21 VG_STATIC void render_world( world_instance *world, camera *cam );
  22 VG_STATIC void render_world_depth( world_instance *world, camera *cam );
  23
  24 #ifndef RENDER_H
  25 #define RENDER_H
  26
  27 typedef struct framebuffer framebuffer;
  28
  29
  30 /*
  31  * All standard buffers used in rendering
  32  */
  33 VG_STATIC struct pipeline
  34 {
  35    glmesh fsquad;
  36
  37    framebuffer *fb_main,
  38                *fb_water_reflection,
  39                *fb_water_beneath;
  40
  41    struct light_widget
  42    {
  43       int enabled;
  44       v2f dir;
  45       v3f colour;
  46    }
  47    widgets[3];
  48
  49    float shadow_spread, shadow_length;
  50
  51    int ready;
  52 }
  53 gpipeline =
  54 {
  55    .widgets =
  56    {
  57       {
  58          .enabled = 1,
  59          .colour = { 1.36f, 1.35f, 1.01f },
  60          .dir = { 0.63f, -0.08f }
  61       },
  62       {
  63          .enabled = 1,
  64          .colour = { 0.33f, 0.56f, 0.64f },
  65          .dir = { -2.60f, -0.13f }
  66       },
  67       {
  68          .enabled = 1,
  69          .colour = { 0.05f, 0.05f, 0.23f },
  70          .dir = { 2.60f, -0.84f }
  71       }
  72    },
  73    .shadow_spread = 0.65f,
  74    .shadow_length = 9.50f,
  75 };
  76
  77 struct framebuffer
  78 {
  79    const char *display_name;
  80    int         resolution_div,
  81                fixed_w,
  82                fixed_h;
  83
  84    struct framebuffer_attachment
  85    {
  86       const char *display_name;
  87
  88       enum framebuffer_attachment_type
  89       {
  90          k_framebuffer_attachment_type_none,
  91          k_framebuffer_attachment_type_colour,
  92          k_framebuffer_attachment_type_renderbuffer
  93       }
  94       purpose;
  95
  96       enum framebuffer_quality_profile
  97       {
  98          k_framebuffer_quality_all,
  99          k_framebuffer_quality_high_only
 100       }
 101       quality;
 102
 103       GLenum internalformat,
 104              format,
 105              type,
 106              attachment;
 107
 108       GLuint id;
 109
 110       /* Runtime */
 111       int debug_view;
 112    }
 113    attachments[5];
 114    GLuint fb;
 115    framebuffer **link;
 116 }
 117 framebuffers[] =
 118 {
 119    {
 120       /*
 121        * The primary draw target
 122        */
 123       "main",
 124       .link = &gpipeline.fb_main,
 125       .resolution_div = 1,
 126       .attachments =
 127       {
 128          {
 129             "colour", k_framebuffer_attachment_type_colour,
 130
 131             .internalformat = GL_RGB,
 132             .format         = GL_RGB,
 133             .type           = GL_UNSIGNED_BYTE,
 134             .attachment     = GL_COLOR_ATTACHMENT0
 135          },
 136          {
 137             "motion", k_framebuffer_attachment_type_colour,
 138
 139             .quality        = k_framebuffer_quality_high_only,
 140             .internalformat = GL_RG16F,
 141             .format         = GL_RG,
 142             .type           = GL_FLOAT,
 143             .attachment     = GL_COLOR_ATTACHMENT1
 144          },
 145          {
 146             "depth_stencil", k_framebuffer_attachment_type_renderbuffer,
 147
 148             .internalformat = GL_DEPTH24_STENCIL8,
 149             .attachment     = GL_DEPTH_STENCIL_ATTACHMENT
 150          }
 151       }
 152    },
 153    {
 154       /*
 155        * Second rendered view from the perspective of the water reflection
 156        */
 157       "water_reflection",
 158       .link = &gpipeline.fb_water_reflection,
 159       .resolution_div = 3,
 160       .attachments =
 161       {
 162          {
 163             "colour", k_framebuffer_attachment_type_colour,
 164             .internalformat = GL_RGB,
 165             .format         = GL_RGB,
 166             .type           = GL_UNSIGNED_BYTE,
 167             .attachment     = GL_COLOR_ATTACHMENT0
 168          },
 169          {
 170             "depth_stencil", k_framebuffer_attachment_type_renderbuffer,
 171
 172             .internalformat = GL_DEPTH24_STENCIL8,
 173             .attachment     = GL_DEPTH_STENCIL_ATTACHMENT
 174          }
 175       }
 176    },
 177    {
 178       /*
 179        * Thid rendered view from the perspective of the camera, but just
 180        * captures stuff thats under the water
 181        */
 182       "water_beneath",
 183       .link = &gpipeline.fb_water_beneath,
 184       .resolution_div = 4,
 185       .attachments =
 186       {
 187          {
 188             "colour", k_framebuffer_attachment_type_colour,
 189             .internalformat = GL_RED,
 190             .format         = GL_RED,
 191             .type           = GL_UNSIGNED_BYTE,
 192             .attachment     = GL_COLOR_ATTACHMENT0
 193          },
 194          {
 195             "depth_stencil", k_framebuffer_attachment_type_renderbuffer,
 196
 197             .internalformat = GL_DEPTH24_STENCIL8,
 198             .attachment     = GL_DEPTH_STENCIL_ATTACHMENT
 199          }
 200       }
 201    }
 202 };
 203
 204 /*
 205  * Get the current (automatically scaled or fixed) resolution of framebuffer
 206  */
 207 VG_STATIC void render_fb_get_current_res( struct framebuffer *fb,
 208                                           int *x, int *y )
 209 {
 210    if( fb->resolution_div )
 211    {
 212       *x = vg.window_x / fb->resolution_div;
 213       *y = vg.window_y / fb->resolution_div;
 214    }
 215    else
 216    {
 217       *x = fb->fixed_w;
 218       *y = fb->fixed_h;
 219    }
 220 }
 221
 222 /*
 223  * Bind framebuffer for drawing to
 224  */
 225 VG_STATIC void render_fb_bind( framebuffer *fb )
 226 {
 227    int x, y;
 228    render_fb_get_current_res( fb, &x, &y );
 229    glBindFramebuffer( GL_FRAMEBUFFER, fb->fb );
 230    glViewport( 0, 0, x, y );
 231 }
 232
 233 /*
 234  * Bind framebuffer attachment's texture
 235  */
 236 VG_STATIC void render_fb_bind_texture( framebuffer *fb,
 237                                        int attachment, int slot )
 238 {
 239    struct framebuffer_attachment *at = &fb->attachments[attachment];
 240
 241    if( at->purpose != k_framebuffer_attachment_type_colour )
 242    {
 243       vg_fatal_exit_loop( "illegal operation: bind non-colour framebuffer"
 244                           " attachment to texture slot" );
 245    }
 246
 247    glActiveTexture( GL_TEXTURE0 + slot );
 248    glBindTexture( GL_TEXTURE_2D, fb->attachments[attachment].id );
 249 }
 250
 251
 252 /*
 253  * Shaders
 254  */
 255
 256 #define FB_FORMAT_STR( E ) { E, #E },
 257
 258 /*
 259  * Convert OpenGL attachment ID enum to string
 260  */
 261 VG_STATIC const char *render_fb_attachment_str( GLenum e )
 262 {
 263    struct { GLenum e; const char *str; }
 264    formats[] =
 265    {
 266       FB_FORMAT_STR(GL_COLOR_ATTACHMENT0)
 267       FB_FORMAT_STR(GL_COLOR_ATTACHMENT1)
 268       FB_FORMAT_STR(GL_COLOR_ATTACHMENT2)
 269       FB_FORMAT_STR(GL_COLOR_ATTACHMENT3)
 270       FB_FORMAT_STR(GL_COLOR_ATTACHMENT4)
 271       FB_FORMAT_STR(GL_DEPTH_STENCIL_ATTACHMENT)
 272    };
 273
 274    for( int i=0; i<vg_list_size(formats); i++ )
 275       if( formats[i].e == e )
 276          return formats[i].str;
 277
 278    return "UNDEFINED";
 279 }
 280
 281 /*
 282  * Convert OpenGL texture format enums from TexImage2D table 1,2 &
 283  * RenderBufferStorage Table 1, into strings
 284  */
 285 VG_STATIC const char *render_fb_format_str( GLenum format )
 286 {
 287    struct { GLenum e; const char *str; }
 288    formats[] =
 289    {
 290       /* Table 1 */
 291       FB_FORMAT_STR(GL_DEPTH_COMPONENT)
 292       FB_FORMAT_STR(GL_DEPTH_STENCIL)
 293       FB_FORMAT_STR(GL_RED)
 294       FB_FORMAT_STR(GL_RG)
 295       FB_FORMAT_STR(GL_RGB)
 296       FB_FORMAT_STR(GL_RGBA)
 297
 298       /* Render buffer formats */
 299       FB_FORMAT_STR(GL_DEPTH_COMPONENT16)
 300       FB_FORMAT_STR(GL_DEPTH_COMPONENT24)
 301       FB_FORMAT_STR(GL_DEPTH_COMPONENT32F)
 302       FB_FORMAT_STR(GL_DEPTH24_STENCIL8)
 303       FB_FORMAT_STR(GL_DEPTH32F_STENCIL8)
 304       FB_FORMAT_STR(GL_STENCIL_INDEX8)
 305
 306       /* Table 2 */
 307       FB_FORMAT_STR(GL_R8)
 308       FB_FORMAT_STR(GL_R8_SNORM)
 309       FB_FORMAT_STR(GL_R16)
 310       FB_FORMAT_STR(GL_R16_SNORM)
 311       FB_FORMAT_STR(GL_RG8)
 312       FB_FORMAT_STR(GL_RG8_SNORM)
 313       FB_FORMAT_STR(GL_RG16)
 314       FB_FORMAT_STR(GL_RG16_SNORM)
 315       FB_FORMAT_STR(GL_R3_G3_B2)
 316       FB_FORMAT_STR(GL_RGB4)
 317       FB_FORMAT_STR(GL_RGB5)
 318       FB_FORMAT_STR(GL_RGB8)
 319       FB_FORMAT_STR(GL_RGB8_SNORM)
 320       FB_FORMAT_STR(GL_RGB10)
 321       FB_FORMAT_STR(GL_RGB12)
 322       FB_FORMAT_STR(GL_RGB16_SNORM)
 323       FB_FORMAT_STR(GL_RGBA2)
 324       FB_FORMAT_STR(GL_RGBA4)
 325       FB_FORMAT_STR(GL_RGB5_A1)
 326       FB_FORMAT_STR(GL_RGBA8)
 327       FB_FORMAT_STR(GL_RGBA8_SNORM)
 328       FB_FORMAT_STR(GL_RGB10_A2)
 329       FB_FORMAT_STR(GL_RGB10_A2UI)
 330       FB_FORMAT_STR(GL_RGBA12)
 331       FB_FORMAT_STR(GL_RGBA16)
 332       FB_FORMAT_STR(GL_SRGB8)
 333       FB_FORMAT_STR(GL_SRGB8_ALPHA8)
 334       FB_FORMAT_STR(GL_R16F)
 335       FB_FORMAT_STR(GL_RG16F)
 336       FB_FORMAT_STR(GL_RGB16F)
 337       FB_FORMAT_STR(GL_RGBA16F)
 338       FB_FORMAT_STR(GL_R32F)
 339       FB_FORMAT_STR(GL_RG32F)
 340       FB_FORMAT_STR(GL_RGB32F)
 341       FB_FORMAT_STR(GL_RGBA32F)
 342       FB_FORMAT_STR(GL_R11F_G11F_B10F)
 343       FB_FORMAT_STR(GL_RGB9_E5)
 344       FB_FORMAT_STR(GL_R8I)
 345       FB_FORMAT_STR(GL_R8UI)
 346       FB_FORMAT_STR(GL_R16I)
 347       FB_FORMAT_STR(GL_R16UI)
 348       FB_FORMAT_STR(GL_R32I)
 349       FB_FORMAT_STR(GL_R32UI)
 350       FB_FORMAT_STR(GL_RG8I)
 351       FB_FORMAT_STR(GL_RG8UI)
 352       FB_FORMAT_STR(GL_RG16I)
 353       FB_FORMAT_STR(GL_RG16UI)
 354       FB_FORMAT_STR(GL_RG32I)
 355       FB_FORMAT_STR(GL_RG32UI)
 356       FB_FORMAT_STR(GL_RGB8I)
 357       FB_FORMAT_STR(GL_RGB8UI)
 358       FB_FORMAT_STR(GL_RGB16I)
 359       FB_FORMAT_STR(GL_RGB16UI)
 360       FB_FORMAT_STR(GL_RGB32I)
 361       FB_FORMAT_STR(GL_RGB32UI)
 362       FB_FORMAT_STR(GL_RGBA8I)
 363       FB_FORMAT_STR(GL_RGBA8UI)
 364       FB_FORMAT_STR(GL_RGBA16I)
 365       FB_FORMAT_STR(GL_RGBA16UI)
 366       FB_FORMAT_STR(GL_RGBA32I)
 367       FB_FORMAT_STR(GL_RGBA32UI)
 368    };
 369
 370    for( int i=0; i<vg_list_size(formats); i++ )
 371       if( formats[i].e == format )
 372          return formats[i].str;
 373
 374    return "UNDEFINED";
 375 }
 376
 377 /*
 378  * Bind and allocate texture for framebuffer attachment
 379  */
 380 VG_STATIC void render_fb_allocate_texture( struct framebuffer *fb,
 381                                            struct framebuffer_attachment *a )
 382 {
 383    int rx, ry;
 384    render_fb_get_current_res( fb, &rx, &ry );
 385
 386    if( a->purpose == k_framebuffer_attachment_type_renderbuffer )
 387    {
 388       glBindRenderbuffer( GL_RENDERBUFFER, a->id );
 389       glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, rx, ry );
 390    }
 391    else if( a->purpose == k_framebuffer_attachment_type_colour )
 392    {
 393       glBindTexture( GL_TEXTURE_2D, a->id );
 394       glTexImage2D( GL_TEXTURE_2D, 0, a->internalformat, rx, ry,
 395                                    0, a->format, a->type, NULL );
 396    }
 397 }
 398
 399 /*
 400  * Full allocation of a framebuffer
 401  */
 402 VG_STATIC void render_fb_allocate( struct framebuffer *fb )
 403 {
 404    glGenFramebuffers( 1, &fb->fb );
 405    glBindFramebuffer( GL_FRAMEBUFFER, fb->fb );
 406
 407    int rx, ry;
 408    render_fb_get_current_res( fb, &rx, &ry );
 409
 410    vg_info( "allocate_framebuffer( %s, %dx%d )\n", fb->display_name, rx, ry );
 411    vg_info( "{\n" );
 412
 413    GLenum colour_attachments[4];
 414    u32    colour_count = 0;
 415
 416    for( int j=0; j<vg_list_size(fb->attachments); j++ )
 417    {
 418       struct framebuffer_attachment *attachment = &fb->attachments[j];
 419
 420       if( attachment->purpose == k_framebuffer_attachment_type_none )
 421          continue;
 422
 423       vg_info( "  %s: %s\n",
 424                   render_fb_attachment_str( attachment->attachment ),
 425                   render_fb_format_str( attachment->internalformat ) );
 426
 427       if( attachment->purpose == k_framebuffer_attachment_type_renderbuffer )
 428       {
 429          glGenRenderbuffers( 1, &attachment->id );
 430          render_fb_allocate_texture( fb, attachment );
 431          glFramebufferRenderbuffer( GL_FRAMEBUFFER,
 432                                     GL_DEPTH_STENCIL_ATTACHMENT,
 433                                     GL_RENDERBUFFER, attachment->id );
 434       }
 435       else if( attachment->purpose == k_framebuffer_attachment_type_colour )
 436       {
 437          glGenTextures( 1, &attachment->id );
 438          render_fb_allocate_texture( fb, attachment );
 439          glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 440          glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 441          glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 442          glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 443
 444          glFramebufferTexture2D( GL_FRAMEBUFFER, attachment->attachment,
 445                                  GL_TEXTURE_2D,  attachment->id, 0 );
 446
 447          colour_attachments[ colour_count ++ ] = attachment->attachment;
 448       }
 449    }
 450
 451    glDrawBuffers( colour_count, colour_attachments );
 452
 453    /*
 454     * Check result
 455     */
 456    GLenum result = glCheckFramebufferStatus( GL_FRAMEBUFFER );
 457
 458    if( result == GL_FRAMEBUFFER_COMPLETE )
 459    {
 460       /*
 461        * Attatch to gpipeline
 462        */
 463       if( fb->link )
 464          *fb->link = fb;
 465
 466       vg_success( "  status: complete\n" );
 467       vg_info( "}\n" );
 468    }
 469    else
 470    {
 471       if( result == GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT )
 472          vg_error( "  status: Incomplete attachment" );
 473       else if( result == GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT )
 474          vg_error( "  status: Missing attachment" );
 475       else if( result == GL_FRAMEBUFFER_UNSUPPORTED )
 476          vg_error( "  status: Unsupported framebuffer format" );
 477       else
 478          vg_error( "  status: Generic Error" );
 479
 480       vg_info( "}\n" );
 481       vg_fatal_exit_loop( "Incomplete framebuffer (see logs)" );
 482    }
 483 }
 484
 485 /*
 486  * Resize/Update all framebuffers(we know about)
 487  */
 488 VG_STATIC void render_fb_resize(void)
 489 {
 490    if( !gpipeline.ready )
 491       return;
 492
 493    for( int i=0; i<vg_list_size(framebuffers); i++ )
 494    {
 495       struct framebuffer *fb = &framebuffers[i];
 496       for( int j=0; j<vg_list_size(fb->attachments); j++ )
 497       {
 498          struct framebuffer_attachment *attachment = &fb->attachments[j];
 499          render_fb_allocate_texture( fb, attachment );
 500       }
 501    }
 502 }
 503
 504 VG_STATIC int render_framebuffer_control( int argc, char const *argv[] );
 505 VG_STATIC void render_framebuffer_poll( int argc, char const *argv[] );
 506 VG_STATIC void render_init_fs_quad(void)
 507 {
 508    vg_info( "[render] Allocate quad\n" );
 509
 510    float quad[] =
 511    {
 512       0.00f,0.00f, 1.00f,1.00f, 0.00f,1.00f,
 513       0.00f,0.00f, 1.00f,0.00f, 1.00f,1.00f,
 514
 515       0.20f,0.00f, 0.80f,1.00f, 0.20f,1.00f,
 516       0.20f,0.00f, 0.80f,0.00f, 0.80f,1.00f,
 517
 518       /* 9x9 debug grid */
 519       /* row0 */
 520       0.00f,0.00f, 0.30f,0.30f, 0.00f,0.30f,
 521       0.00f,0.00f, 0.30f,0.00f, 0.30f,0.30f,
 522       0.30f,0.00f, 0.60f,0.30f, 0.30f,0.30f,
 523       0.30f,0.00f, 0.60f,0.00f, 0.60f,0.30f,
 524       0.60f,0.00f, 0.90f,0.30f, 0.60f,0.30f,
 525       0.60f,0.00f, 0.90f,0.00f, 0.90f,0.30f,
 526       /* row1 */
 527       0.00f,0.30f, 0.30f,0.60f, 0.00f,0.60f,
 528       0.00f,0.30f, 0.30f,0.30f, 0.30f,0.60f,
 529       0.30f,0.30f, 0.60f,0.60f, 0.30f,0.60f,
 530       0.30f,0.30f, 0.60f,0.30f, 0.60f,0.60f,
 531       0.60f,0.30f, 0.90f,0.60f, 0.60f,0.60f,
 532       0.60f,0.30f, 0.90f,0.30f, 0.90f,0.60f,
 533       /* row2 */
 534       0.00f,0.60f, 0.30f,0.90f, 0.00f,0.90f,
 535       0.00f,0.60f, 0.30f,0.60f, 0.30f,0.90f,
 536       0.30f,0.60f, 0.60f,0.90f, 0.30f,0.90f,
 537       0.30f,0.60f, 0.60f,0.60f, 0.60f,0.90f,
 538       0.60f,0.60f, 0.90f,0.90f, 0.60f,0.90f,
 539       0.60f,0.60f, 0.90f,0.60f, 0.90f,0.90f,
 540    };
 541
 542         vg_function_push( (struct vg_cmd)
 543    {
 544                 .name = "fb",
 545                 .function = render_framebuffer_control,
 546       .poll_suggest = render_framebuffer_poll
 547         });
 548
 549    glGenVertexArrays( 1, &gpipeline.fsquad.vao );
 550    glGenBuffers( 1, &gpipeline.fsquad.vbo );
 551    glBindVertexArray( gpipeline.fsquad.vao );
 552    glBindBuffer( GL_ARRAY_BUFFER, gpipeline.fsquad.vbo );
 553    glBufferData( GL_ARRAY_BUFFER, sizeof(quad), quad, GL_STATIC_DRAW );
 554    glBindVertexArray( gpipeline.fsquad.vao );
 555    glVertexAttribPointer( 0, 2, GL_FLOAT, GL_FALSE,
 556                           sizeof(float)*2, (void*)0 );
 557    glEnableVertexAttribArray( 0 );
 558
 559    VG_CHECK_GL_ERR();
 560 }
 561
 562 VG_STATIC void render_init(void)
 563 {
 564    shader_blit_register();
 565    shader_blitblur_register();
 566    shader_blitcolour_register();
 567
 568    vg_acquire_thread_sync();
 569    {
 570       /*
 571        * Complete Framebuffers
 572        */
 573       for( int i=0; i<vg_list_size(framebuffers); i++ )
 574       {
 575          struct framebuffer *fb = &framebuffers[i];
 576          render_fb_allocate( fb );
 577       }
 578
 579       render_init_fs_quad();
 580
 581       glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 582       gpipeline.ready = 1;
 583    }
 584
 585    vg_release_thread_sync();
 586 }
 587
 588 /*
 589  * Utility
 590  */
 591 VG_STATIC void render_fsquad(void)
 592 {
 593    glBindVertexArray( gpipeline.fsquad.vao );
 594    glDrawArrays( GL_TRIANGLES, 0, 6 );
 595 }
 596
 597 VG_STATIC void render_fsquad1(void)
 598 {
 599    glBindVertexArray( gpipeline.fsquad.vao );
 600    glDrawArrays( GL_TRIANGLES, 6, 6 );
 601 }
 602
 603 /*
 604  * Call this inside the UI function
 605  */
 606 VG_STATIC void render_view_framebuffer_ui(void)
 607 {
 608    int viewing_count = 0;
 609
 610    glBindVertexArray( gpipeline.fsquad.vao );
 611    shader_blit_use();
 612    shader_blit_uTexMain( 0 );
 613
 614    for( int i=0; i<vg_list_size(framebuffers); i++ )
 615    {
 616       struct framebuffer *fb = &framebuffers[i];
 617
 618       for( int j=0; j<vg_list_size(fb->attachments); j++ )
 619       {
 620          struct framebuffer_attachment *at = &fb->attachments[j];
 621
 622          if( !at->debug_view )
 623             continue;
 624
 625          v2f corner,
 626              window = { vg.window_x, vg.window_y };
 627
 628          corner[0] = viewing_count % 3;
 629          corner[1] = 1 + (viewing_count / 3);
 630          v2_mul( corner, window, corner );
 631          v2_muls( corner, 0.3f, corner );
 632          corner[1] = vg.window_y - corner[1];
 633
 634          ui_text( (ui_rect){ corner[0], corner[1],      0.0f, 0.0f },
 635                   fb->display_name, 2, k_text_align_left );
 636          ui_text( (ui_rect){ corner[0], corner[1] + 32, 0.0f, 0.0f, },
 637                   at->display_name, 1, k_text_align_left );
 638
 639          if( at->purpose == k_framebuffer_attachment_type_renderbuffer )
 640          {
 641             v2f center;
 642             v2_muladds( corner, window, 0.15f, center );
 643
 644             ui_text( (ui_rect){ center[0], center[1], 0.0f, 0.0f },
 645                      "<hardware texture>", 1, k_text_align_center );
 646          }
 647          else
 648          {
 649             render_fb_bind_texture( fb, j, 0 );
 650
 651             int start = (viewing_count+2) * 6,
 652                 count = 6;
 653             glDrawArrays( GL_TRIANGLES, start, count );
 654          }
 655
 656          viewing_count ++;
 657       }
 658    }
 659 }
 660
 661 VG_STATIC void render_framebuffer_show( struct framebuffer *fb,
 662                                         struct framebuffer_attachment *at,
 663                                         int operation )
 664 {
 665    at->debug_view = operation;
 666    vg_info( "%s %s:%s\n", (operation?"shown": "hidden"),
 667                fb->display_name, at->display_name );
 668 }
 669
 670 /*
 671  * arg0: command           "show"/"hide"
 672  * arg1: framebuffer name  <name>/"all"
 673  * arg2: subname           <name>/none
 674  */
 675 VG_STATIC int render_framebuffer_control( int argc, char const *argv[] )
 676 {
 677    if( argc < 2 )
 678    {
 679       vg_error( "Usage: fb \"show/hide\" <name>/\"all\" <name>/none\n" );
 680       return 0;
 681    }
 682
 683    int modify_all = 0,
 684        operation  = 0;
 685
 686    if( !strcmp( argv[0], "show" ) )
 687       operation = 1;
 688    else if( !strcmp( argv[0], "hide" ) )
 689       operation = 0;
 690    else
 691    {
 692       vg_error( "Unknown framebuffer operation: '%s'\n", argv[0] );
 693       return 0;
 694    }
 695
 696    if( !strcmp( argv[1], "all" ) )
 697       modify_all = 1;
 698
 699    for( int i=0; i<vg_list_size(framebuffers); i++ )
 700    {
 701       struct framebuffer *fb = &framebuffers[i];
 702
 703       for( int j=0; j<vg_list_size(fb->attachments); j++ )
 704       {
 705          struct framebuffer_attachment *at = &fb->attachments[j];
 706
 707          if( at->purpose == k_framebuffer_attachment_type_none )
 708             continue;
 709
 710          if( modify_all )
 711          {
 712             render_framebuffer_show( fb, at, operation );
 713          }
 714          else
 715          {
 716             if( !strcmp( fb->display_name, argv[1] ) )
 717             {
 718                if( argc == 2 )
 719                   render_framebuffer_show( fb, at, operation );
 720                else if( !strcmp( at->display_name, argv[2] ) )
 721                   render_framebuffer_show( fb, at, operation );
 722             }
 723          }
 724       }
 725    }
 726
 727    return 0;
 728 }
 729
 730 VG_STATIC void render_framebuffer_poll( int argc, char const *argv[] )
 731 {
 732    const char *term = argv[argc-1];
 733
 734    if( argc == 1 )
 735    {
 736       console_suggest_score_text( "show", term, 0 );
 737       console_suggest_score_text( "hide", term, 0 );
 738    }
 739    else if( argc == 2 )
 740    {
 741       console_suggest_score_text( "all", term, 0 );
 742
 743       for( int i=0; i<vg_list_size(framebuffers); i++ )
 744       {
 745          struct framebuffer *fb = &framebuffers[i];
 746          console_suggest_score_text( fb->display_name, term, 0 );
 747       }
 748    }
 749    else if( argc == 3 )
 750    {
 751       int modify_all = 0;
 752
 753       if( !strcmp( argv[1], "all" ) )
 754          modify_all = 1;
 755
 756       for( int i=0; i<vg_list_size(framebuffers); i++ )
 757       {
 758          struct framebuffer *fb = &framebuffers[i];
 759
 760          for( int j=0; j<vg_list_size(fb->attachments); j++ )
 761          {
 762             struct framebuffer_attachment *at = &fb->attachments[j];
 763
 764             if( at->purpose == k_framebuffer_attachment_type_none )
 765                continue;
 766
 767             if( modify_all )
 768             {
 769                console_suggest_score_text( at->display_name, term, 0 );
 770             }
 771             else if( !strcmp( fb->display_name, argv[1] ) )
 772             {
 773                console_suggest_score_text( at->display_name, term, 0 );
 774             }
 775          }
 776       }
 777    }
 778 }
 779
 780 #endif /* RENDER_H */