font.h

   1 #pragma once
   2 #include "model.h"
   3 #include "entity.h"
   4 #include "vg/vg_camera.h"
   5 #include "shaders/model_font.h"
   6 #include "shaders/scene_font.h"
   7 #include "world_render.h"
   8 #include "depth_compare.h"
   9
  10 enum efont_SRglyph{
  11    k_SRglyph_end           = 0x00, /* control characters */
  12    k_SRglyph_ctrl_variant  = 0x01,
  13    k_SRglyph_ctrl_size     = 0x02, /* normalized 0-1 */
  14    k_SRglyph_ctrl_center   = 0x03, /* useful when text is scaled down */
  15    k_SRglyph_ctrl_baseline = 0x04, /* . */
  16    k_SRglyph_ctrl_top      = 0x05, /* . */
  17    k_SRglyph_mod_circle    = 0x1e, /* surround and center next charater */
  18    k_SRglyph_mod_square    = 0x1f, /* surround and center next character */
  19    k_SRglyph_ascii_min     = 0x20, /* standard ascii */
  20    k_SRglyph_ascii_max     = 0x7e,
  21    k_SRglyph_ps4_square    = 0x7f,/* playstation buttons */
  22    k_SRglyph_ps4_triangle  = 0x80,
  23    k_SRglyph_ps4_circle    = 0x81,
  24    k_SRglyph_ps4_cross     = 0x82,
  25    k_SRglyph_xb1_x         = 0x83,/* xbox buttons */
  26    k_SRglyph_xb1_y         = 0x84,
  27    k_SRglyph_xb1_a         = 0x85,
  28    k_SRglyph_xb1_b         = 0x86,
  29    k_SRglyph_gen_ls        = 0x87,/* generic gamepad */
  30    k_SRglyph_gen_lsh       = 0x88,
  31    k_SRglyph_gen_lsv       = 0x89,
  32    k_SRglyph_gen_lshv      = 0x8a,
  33    k_SRglyph_gen_rs        = 0x8b,
  34    k_SRglyph_gen_rsh       = 0x8c,
  35    k_SRglyph_gen_rsv       = 0x8d,
  36    k_SRglyph_gen_rshv      = 0x8e,
  37    k_SRglyph_gen_lt        = 0x8f,
  38    k_SRglyph_gen_rt        = 0x90,
  39    k_SRglyph_gen_lb        = 0x91,
  40    k_SRglyph_gen_rb        = 0x92,
  41    k_SRglyph_gen_left      = 0x93,
  42    k_SRglyph_gen_up        = 0x94,
  43    k_SRglyph_gen_right     = 0x95,
  44    k_SRglyph_gen_down      = 0x96,
  45    k_SRglyph_gen_options   = 0x97,
  46    k_SRglyph_gen_shareview = 0x98,
  47    k_SRglyph_kbm_m0        = 0x99,/* mouse */
  48    k_SRglyph_kbm_m1        = 0x9a,
  49    k_SRglyph_kbm_m01       = 0x9b,
  50    k_SRglyph_kbm_m2        = 0x9c,
  51    k_SRglyph_kbm_m2s       = 0x9d,
  52    k_SRglyph_kbm_shift     = 0x9e,/* modifiers */
  53    k_SRglyph_kbm_ctrl      = 0x9f,
  54    k_SRglyph_kbm_alt       = 0xa0,
  55    k_SRglyph_kbm_space     = 0xa1,
  56    k_SRglyph_kbm_return    = 0xa2,
  57    k_SRglyph_kbm_escape    = 0xa3,
  58    k_SRglyph_kbm_mousemove = 0xa4,
  59    k_SRglyph_vg_ret        = 0xa5,
  60    k_SRglyph_vg_link       = 0xa6,
  61    k_SRglyph_vg_square     = 0xa7,
  62    k_SRglyph_vg_triangle   = 0xa8,
  63    k_SRglyph_vg_circle     = 0xa9
  64 };
  65
  66 typedef struct font3d font3d;
  67 struct font3d{
  68    mdl_context mdl;
  69    GLuint texture;
  70    glmesh mesh;
  71
  72    ent_font info;
  73    mdl_array_ptr font_variants,
  74                  glyphs;
  75 };
  76
  77 static void font3d_load( font3d *font, const char *mdl_path, void *alloc ){
  78    mdl_open( &font->mdl, mdl_path, alloc );
  79    mdl_load_metadata_block( &font->mdl, alloc );
  80
  81    vg_linear_clear( vg_mem.scratch );
  82    mdl_array_ptr fonts;
  83    MDL_LOAD_ARRAY( &font->mdl, &fonts, ent_font, vg_mem.scratch );
  84    font->info = *((ent_font *)mdl_arritm(&fonts,0));
  85
  86    MDL_LOAD_ARRAY( &font->mdl, &font->font_variants, ent_font_variant, alloc);
  87    MDL_LOAD_ARRAY( &font->mdl, &font->glyphs, ent_glyph, alloc );
  88
  89    vg_linear_clear( vg_mem.scratch );
  90
  91    if( !mdl_arrcount( &font->mdl.textures ) )
  92       vg_fatal_error( "No texture in font file" );
  93
  94    mdl_texture *tex0 = mdl_arritm( &font->mdl.textures, 0 );
  95    void *data = vg_linear_alloc( vg_mem.scratch, tex0->file.pack_size );
  96    mdl_fread_pack_file( &font->mdl, &tex0->file, data );
  97
  98    mdl_async_load_glmesh( &font->mdl, &font->mesh, NULL );
  99    vg_tex2d_load_qoi_async( data, tex0->file.pack_size,
 100                             VG_TEX2D_LINEAR|VG_TEX2D_CLAMP,
 101                             &font->texture );
 102
 103    mdl_close( &font->mdl );
 104 }
 105
 106 static u32 font3d_find_variant( font3d *font, const char *name ){
 107    for( u32 i=0; i<mdl_arrcount( &font->font_variants ); i ++ ){
 108       ent_font_variant *variant = mdl_arritm( &font->font_variants, i );
 109
 110       if( !strcmp( mdl_pstr( &font->mdl, variant->name ), name ) ){
 111          return i;
 112       }
 113    }
 114
 115    return 0;
 116 }
 117
 118 struct _font3d_render{
 119    v4f offset;
 120    font3d *font;
 121    u32 variant_id;
 122
 123    enum font_shader {
 124       k_font_shader_default,
 125       k_font_shader_world
 126    }
 127    shader;
 128 }
 129 static gui_font3d;
 130
 131 /*
 132  * world can be null if not using world shader
 133  */
 134 static void font3d_bind( font3d *font, enum font_shader shader,
 135                          int depth_compare, world_instance *world,
 136                          vg_camera *cam ){
 137    gui_font3d.shader = shader;
 138    gui_font3d.font = font;
 139    glActiveTexture( GL_TEXTURE1 );
 140    glBindTexture( GL_TEXTURE_2D, font->texture );
 141
 142    if( shader == k_font_shader_default )
 143    {
 144       shader_model_font_use();
 145       shader_model_font_uColour( (v4f){1.0f,1.0f,1.0f,1.0f} );
 146       shader_model_font_uTexMain( 1 );
 147       shader_model_font_uDepthMode( depth_compare );
 148
 149       if( depth_compare ){
 150          depth_compare_bind(
 151             shader_model_font_uTexSceneDepth,
 152             shader_model_font_uInverseRatioDepth,
 153             shader_model_font_uInverseRatioMain, cam );
 154       }
 155
 156       shader_model_font_uPv( cam->mtx.pv );
 157    }
 158    else if( shader == k_font_shader_world )
 159    {
 160       shader_scene_font_use();
 161       shader_scene_font_uTexGarbage(0);
 162       shader_scene_font_uTexMain(1);
 163
 164       shader_scene_font_uPv( skaterift.cam.mtx.pv );
 165       shader_scene_font_uTime( vg.time );
 166
 167       WORLD_BIND_LIGHT_BUFFERS_UB0_TEX234( world, scene_font );
 168
 169       bind_terrain_noise();
 170       shader_scene_font_uCamera( skaterift.cam.transform[3] );
 171    }
 172    mesh_bind( &font->mesh );
 173 }
 174
 175 static ent_glyph *font3d_glyph( font3d *font, u32 variant_id, u32 utf32 ){
 176    if( utf32 < font->info.glyph_utf32_base ) return NULL;
 177    if( utf32 >= font->info.glyph_utf32_base+font->info.glyph_count) return NULL;
 178
 179    u32 index = utf32 - font->info.glyph_utf32_base;
 180        index += font->info.glyph_start;
 181        index += font->info.glyph_count * variant_id;
 182    return mdl_arritm( &font->glyphs, index );
 183 }
 184
 185 static void font3d_set_transform( const char *text,
 186                                   vg_camera *cam, m4x3f transform ){
 187    v4_copy( (v4f){0.0f,0.0f,0.0f,1.0f}, gui_font3d.offset );
 188
 189    m4x4f prev_mtx;
 190    m4x3_expand( transform, prev_mtx );
 191    m4x4_mul( cam->mtx_prev.pv, prev_mtx, prev_mtx );
 192
 193    if( gui_font3d.shader == k_font_shader_default ){
 194       shader_model_font_uPvmPrev( prev_mtx );
 195       shader_model_font_uMdl( transform );
 196    }
 197    else if( gui_font3d.shader == k_font_shader_world ){
 198       shader_scene_font_uPvmPrev( prev_mtx );
 199       shader_scene_font_uMdl( transform );
 200    }
 201 }
 202
 203 static void font3d_setoffset( v4f offset ){
 204    if( gui_font3d.shader == k_font_shader_default )
 205       shader_model_font_uOffset( offset );
 206    else if( gui_font3d.shader == k_font_shader_world )
 207       shader_scene_font_uOffset( offset );
 208 }
 209
 210 static void font3d_setcolour( v4f colour ){
 211    if( gui_font3d.shader == k_font_shader_default )
 212       shader_model_font_uColour( colour );
 213 #if 0
 214    else if( gui_font3d.shader == k_font_shader_world )
 215       shader_scene_font_uColour( colour );
 216 #endif
 217 }
 218
 219 static void font3d_draw( const char *text ){
 220    u8 *u8pch = (u8*)text;
 221
 222    u32 max_chars = 512;
 223    while( u8pch && max_chars ){
 224       max_chars --;
 225
 226       u32 c0 = *u8pch, c1;
 227       u8pch ++;
 228
 229       if( !c0 ) break;
 230
 231       ent_glyph *glyph0 = font3d_glyph( gui_font3d.font,
 232                                         gui_font3d.variant_id, c0 ),
 233                 *glyph1 = NULL;
 234
 235       /* multibyte characters */
 236       if( c0 >= 1 && c0 < k_SRglyph_ascii_min ){
 237          c1 = *u8pch;
 238          if( !c1 ) break;
 239          glyph1 = font3d_glyph( gui_font3d.font, gui_font3d.variant_id, c1 );
 240       }
 241
 242       if( c0 == k_SRglyph_ctrl_variant ){
 243          gui_font3d.variant_id = c1;
 244          u8pch ++;
 245          continue;
 246       }
 247       else if( c0 == k_SRglyph_ctrl_size ){
 248          gui_font3d.offset[3] = (float)c1 * (1.0f/255.0f);
 249          u8pch ++;
 250          continue;
 251       }
 252       else if( c0 == k_SRglyph_ctrl_baseline ){
 253          gui_font3d.offset[1] = 0.0f;
 254          continue;
 255       }
 256       else if( c0 == k_SRglyph_ctrl_center ){
 257          if( glyph1 ){
 258             float diff = glyph1->size[1] - glyph1->size[1]*gui_font3d.offset[3];
 259             gui_font3d.offset[1] = diff * 0.5f;
 260          }
 261          continue;
 262       }
 263       else if( c0 == k_SRglyph_ctrl_top ){
 264          if( glyph1 ){
 265             float diff = glyph1->size[1] - glyph1->size[1]*gui_font3d.offset[3];
 266             gui_font3d.offset[1] = diff;
 267          }
 268          continue;
 269       }
 270
 271       if( !glyph0 ) continue;
 272
 273       if( glyph1 && (c0 == k_SRglyph_mod_square || c0 == k_SRglyph_mod_circle)){
 274          v4f v0;
 275          v2_sub( glyph0->size, glyph1->size, v0 );
 276          v2_muladds( gui_font3d.offset, v0, -0.5f, v0 );
 277          v0[2] = gui_font3d.offset[2];
 278          v0[3] = gui_font3d.offset[3];
 279
 280          font3d_setoffset( v0 );
 281          mesh_drawn( glyph0->indice_start, glyph0->indice_count );
 282          continue;
 283       }
 284       else{
 285          font3d_setoffset( gui_font3d.offset );
 286          mesh_drawn( glyph0->indice_start, glyph0->indice_count );
 287       }
 288
 289       gui_font3d.offset[0] += glyph0->size[0]*gui_font3d.offset[3];
 290    }
 291 }
 292
 293 static f32 font3d_simple_draw( u32 variant_id, const char *text,
 294                                vg_camera *cam, m4x3f transform ){
 295    if( !text ) return 0.0f;
 296
 297    gui_font3d.variant_id = variant_id;
 298    font3d_set_transform( text, cam, transform );
 299    font3d_draw( text );
 300    return gui_font3d.offset[0];
 301 }
 302
 303 static f32 font3d_string_width( u32 variant_id, const char *text ){
 304    if( !text ) return 0.0f;
 305    float width = 0.0f;
 306
 307    const u8 *buf = (const u8 *)text;
 308    for( int i=0;; i++ ){
 309       u32 c = buf[i];
 310       if(!c) break;
 311
 312       ent_glyph *glyph = font3d_glyph( gui_font3d.font, variant_id, c );
 313       if( !glyph ) continue;
 314
 315       width += glyph->size[0];
 316    }
 317
 318    return width;
 319 }