src/graphics/grgl1render.cpp

   1 /*
   2  * Copyright (C) Volition, Inc. 1999.  All rights reserved.
   3  *
   4  * All source code herein is the property of Volition, Inc. You may not sell
   5  * or otherwise commercially exploit the source or things you created based on
   6  * the source.
   7  */
   8
   9 #include "pstypes.h"
  10 #include "2d.h"
  11 #include "gropengl.h"
  12 #include "grgl1.h"
  13 #include "gropenglinternal.h"
  14 #include "bmpman.h"
  15 #include "grinternal.h"
  16 #include "3d.h"
  17 #include "neb.h"
  18 #include "line.h"
  19 #include "palman.h"
  20
  21
  22 extern int OGL_fog_mode;
  23
  24 #define NEBULA_COLORS 20
  25
  26
  27 static void opengl1_rect_internal(int x, int y, int w, int h, int r, int g, int b, int a)
  28 {
  29         int saved_zbuf;
  30         vertex v[4];
  31         vertex *verts[4] = {&v[0], &v[1], &v[2], &v[3]};
  32
  33         saved_zbuf = gr_zbuffer_get();
  34
  35         // start the frame, no zbuffering, no culling
  36         g3_start_frame(1);
  37         gr_zbuffer_set(GR_ZBUFF_NONE);
  38         gr_set_cull(0);
  39
  40         // stuff coords
  41         v[0].sx = i2fl(x);
  42         v[0].sy = i2fl(y);
  43         v[0].sw = 0.0f;
  44         v[0].u = 0.0f;
  45         v[0].v = 0.0f;
  46         v[0].flags = PF_PROJECTED;
  47         v[0].codes = 0;
  48         v[0].r = (ubyte)r;
  49         v[0].g = (ubyte)g;
  50         v[0].b = (ubyte)b;
  51         v[0].a = (ubyte)a;
  52
  53         v[1].sx = i2fl(x + w);
  54         v[1].sy = i2fl(y);
  55         v[1].sw = 0.0f;
  56         v[1].u = 0.0f;
  57         v[1].v = 0.0f;
  58         v[1].flags = PF_PROJECTED;
  59         v[1].codes = 0;
  60         v[1].r = (ubyte)r;
  61         v[1].g = (ubyte)g;
  62         v[1].b = (ubyte)b;
  63         v[1].a = (ubyte)a;
  64
  65         v[2].sx = i2fl(x + w);
  66         v[2].sy = i2fl(y + h);
  67         v[2].sw = 0.0f;
  68         v[2].u = 0.0f;
  69         v[2].v = 0.0f;
  70         v[2].flags = PF_PROJECTED;
  71         v[2].codes = 0;
  72         v[2].r = (ubyte)r;
  73         v[2].g = (ubyte)g;
  74         v[2].b = (ubyte)b;
  75         v[2].a = (ubyte)a;
  76
  77         v[3].sx = i2fl(x);
  78         v[3].sy = i2fl(y + h);
  79         v[3].sw = 0.0f;
  80         v[3].u = 0.0f;
  81         v[3].v = 0.0f;
  82         v[3].flags = PF_PROJECTED;
  83         v[3].codes = 0;
  84         v[3].r = (ubyte)r;
  85         v[3].g = (ubyte)g;
  86         v[3].b = (ubyte)b;
  87         v[3].a = (ubyte)a;
  88
  89         // draw the polys
  90         g3_draw_poly_constant_sw(4, verts, TMAP_FLAG_GOURAUD | TMAP_FLAG_RGB | TMAP_FLAG_ALPHA, 0.1f);
  91
  92         g3_end_frame();
  93
  94         // restore zbuffer and culling
  95         gr_zbuffer_set(saved_zbuf);
  96         gr_set_cull(1);
  97 }
  98
  99 static void opengl1_aabitmap_ex_internal(int x,int y,int w,int h,int sx,int sy)
 100 {
 101         if ( (w < 1) || (h < 1) ) {
 102                 return;
 103         }
 104
 105         if ( !gr_screen.current_color.is_alphacolor ) {
 106                 return;
 107         }
 108
 109         float u_scale, v_scale;
 110
 111         if ( !opengl1_tcache_set(gr_screen.current_bitmap, TCACHE_TYPE_AABITMAP,
 112                         &u_scale, &v_scale, 0, -1, -1, 0) )
 113         {
 114                 // Couldn't set texture
 115                 mprintf(( "WARNING: Error setting aabitmap texture!\n" ));
 116                 return;
 117         }
 118
 119         opengl1_set_state( TEXTURE_SOURCE_NO_FILTERING, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
 120
 121         float u0, u1, v0, v1;
 122         float x1, x2, y1, y2;
 123         int bw, bh;
 124
 125         bm_get_info( gr_screen.current_bitmap, &bw, &bh );
 126
 127         u0 = u_scale*i2fl(sx)/i2fl(bw);
 128         v0 = v_scale*i2fl(sy)/i2fl(bh);
 129
 130         u1 = u_scale*i2fl(sx+w)/i2fl(bw);
 131         v1 = v_scale*i2fl(sy+h)/i2fl(bh);
 132
 133         x1 = i2fl(x+gr_screen.offset_x);
 134         y1 = i2fl(y+gr_screen.offset_y);
 135         x2 = i2fl(x+w+gr_screen.offset_x);
 136         y2 = i2fl(y+h+gr_screen.offset_y);
 137
 138         glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
 139                         gr_screen.current_color.blue,gr_screen.current_color.alpha);
 140
 141         opengl_alloc_render_buffer(4);
 142
 143         render_buffer[0].x = x1;
 144         render_buffer[0].y = y1;
 145         render_buffer[0].u = u0;
 146         render_buffer[0].v = v0;
 147
 148         render_buffer[1].x = x1;
 149         render_buffer[1].y = y2;
 150         render_buffer[1].u = u0;
 151         render_buffer[1].v = v1;
 152
 153         render_buffer[2].x = x2;
 154         render_buffer[2].y = y1;
 155         render_buffer[2].u = u1;
 156         render_buffer[2].v = v0;
 157
 158         render_buffer[3].x = x2;
 159         render_buffer[3].y = y2;
 160         render_buffer[3].u = u1;
 161         render_buffer[3].v = v1;
 162
 163         glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 164         glEnableClientState(GL_VERTEX_ARRAY);
 165
 166         glTexCoordPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].u);
 167         glVertexPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 168
 169         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 170
 171         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 172         glDisableClientState(GL_VERTEX_ARRAY);
 173 }
 174
 175 static void opengl1_stuff_fog_value(float z, float *f_val)
 176 {
 177         float f_float;
 178
 179         if ( !f_val ) {
 180                 return;
 181         }
 182
 183         f_float = 1.0f - ((gr_screen.fog_far - z) / (gr_screen.fog_far - gr_screen.fog_near));
 184
 185         if (f_float < 0.0f) {
 186                 f_float = 0.0f;
 187         } else if (f_float > 1.0f) {
 188                 f_float = 1.0f;
 189         }
 190
 191         *f_val = f_float;
 192 }
 193
 194 static void opengl1_tmapper_internal( int nv, vertex ** verts, uint flags, int is_scaler )
 195 {
 196         int i;
 197         float u_scale = 1.0f, v_scale = 1.0f;
 198
 199         gr_texture_source texture_source = TEXTURE_SOURCE_NONE;
 200         gr_alpha_blend alpha_blend = ALPHA_BLEND_ALPHA_BLEND_ALPHA;
 201         gr_zbuffer_type zbuffer_type = ZBUFFER_TYPE_NONE;
 202
 203         if (Gr_zbuffering) {
 204                 if ( is_scaler || (gr_screen.current_alphablend_mode == GR_ALPHABLEND_FILTER) ) {
 205                         zbuffer_type = ZBUFFER_TYPE_READ;
 206                 } else {
 207                         zbuffer_type = ZBUFFER_TYPE_FULL;
 208                 }
 209         }
 210
 211         int tmap_type = TCACHE_TYPE_NORMAL;
 212
 213         ubyte r = 255, g = 255, b = 255, a = 255;
 214
 215         if ( !(flags & TMAP_FLAG_TEXTURED) ) {
 216                 r = gr_screen.current_color.red;
 217                 g = gr_screen.current_color.green;
 218                 b = gr_screen.current_color.blue;
 219         }
 220
 221         if (gr_screen.current_alphablend_mode == GR_ALPHABLEND_FILTER) {
 222                 alpha_blend = ALPHA_BLEND_ALPHA_ADDITIVE;
 223
 224                 // Blend with screen pixel using src*alpha+dst
 225
 226                 if (gr_screen.current_alpha < 1.0f) {
 227                         r = ubyte((r * gr_screen.current_alpha) + 0.5f);
 228                         g = ubyte((g * gr_screen.current_alpha) + 0.5f);
 229                         b = ubyte((b * gr_screen.current_alpha) + 0.5f);
 230                 }
 231         }
 232
 233         if (flags & TMAP_FLAG_BITMAP_SECTION) {
 234                 SDL_assert( !(flags & TMAP_FLAG_BITMAP_INTERFACE) );
 235                 tmap_type = TCACHE_TYPE_BITMAP_SECTION;
 236         } else if (flags & TMAP_FLAG_BITMAP_INTERFACE) {
 237                 SDL_assert( !(flags & TMAP_FLAG_BITMAP_SECTION) );
 238                 tmap_type = TCACHE_TYPE_BITMAP_INTERFACE;
 239         }
 240
 241         if (flags & TMAP_FLAG_TEXTURED) {
 242                 if ( !opengl1_tcache_set(gr_screen.current_bitmap, tmap_type, &u_scale,
 243                                 &v_scale, 0, gr_screen.current_bitmap_sx, gr_screen.current_bitmap_sy, 0) )
 244                 {
 245                         mprintf(( "Not rendering a texture because it didn't fit in VRAM!\n" ));
 246                         return;
 247                 }
 248
 249                 // use non-filtered textures for bitmap sections and UI graphics
 250                 switch (tmap_type) {
 251                         case TCACHE_TYPE_BITMAP_INTERFACE:
 252                         case TCACHE_TYPE_BITMAP_SECTION:
 253                                 texture_source = TEXTURE_SOURCE_NO_FILTERING;
 254                                 break;
 255
 256                         default:
 257                                 texture_source = TEXTURE_SOURCE_DECAL;
 258                                 break;
 259                 }
 260         }
 261
 262
 263         opengl1_set_state( texture_source, alpha_blend, zbuffer_type );
 264
 265         float ox = gr_screen.offset_x * 16.0f;
 266         float oy = gr_screen.offset_y * 16.0f;
 267
 268         float fr = 1.0f, fg = 1.0f, fb = 1.0f;
 269
 270         if (flags & TMAP_FLAG_PIXEL_FOG) {
 271                 int r, g, b;
 272                 int ra, ga, ba;
 273                 float sx, sy;
 274
 275                 ra = ga = ba = 0;
 276
 277                 /* argh */
 278                 for (i=nv-1;i>=0;i--)   // DDOI - change polygon winding
 279                 {
 280                         vertex * va = verts[i];
 281
 282                         sx = (va->sx * 16.0f + ox) / 16.0f;
 283                         sy = (va->sy * 16.0f + oy) / 16.0f;
 284
 285                         neb2_get_pixel((int)sx, (int)sy, &r, &g, &b);
 286
 287                         ra += r;
 288                         ga += g;
 289                         ba += b;
 290                 }
 291
 292                 ra /= nv;
 293                 ga /= nv;
 294                 ba /= nv;
 295
 296                 gr_fog_set(GR_FOGMODE_FOG, ra, ga, ba, -1.0f, -1.0f);
 297
 298                 fr = ra / 255.0f;
 299                 fg = ga / 255.0f;
 300                 fb = ba / 255.0f;
 301         }
 302
 303         opengl_alloc_render_buffer(nv);
 304
 305         int rb_offset = 0;
 306
 307         float sx, sy, sz = 0.99f, rhw = 1.0f;
 308
 309         for (i = nv-1; i >= 0; i--) {
 310                 vertex *va = verts[i];
 311
 312                 if ( Gr_zbuffering || (flags & TMAP_FLAG_NEBULA) ) {
 313                         sz = 1.0f - 1.0f / (1.0f + va->z / (32768.0f / 256.0f));
 314
 315                         if ( sz > 0.98f ) {
 316                                 sz = 0.98f;
 317                         }
 318                 }
 319
 320                 if (flags & TMAP_FLAG_CORRECT) {
 321                         rhw = 1.0f / va->sw;
 322                 }
 323
 324                 if (flags & TMAP_FLAG_ALPHA) {
 325                         a = verts[i]->a;
 326                 }
 327
 328                 if (flags & TMAP_FLAG_NEBULA ) {
 329                         int pal = (verts[i]->b*(NEBULA_COLORS-1))/255;
 330                         r = gr_palette[pal*3+0];
 331                         g = gr_palette[pal*3+1];
 332                         b = gr_palette[pal*3+2];
 333                 } else if ( (flags & TMAP_FLAG_RAMP) && (flags & TMAP_FLAG_GOURAUD) )   {
 334                         r = g = b = Gr_gamma_lookup[verts[i]->b];
 335                 } else if ( (flags & TMAP_FLAG_RGB)  && (flags & TMAP_FLAG_GOURAUD) )   {
 336                         // Make 0.75 be 256.0f
 337                         r = Gr_gamma_lookup[verts[i]->r];
 338                         g = Gr_gamma_lookup[verts[i]->g];
 339                         b = Gr_gamma_lookup[verts[i]->b];
 340                 }
 341
 342                 render_buffer[rb_offset].r = r;
 343                 render_buffer[rb_offset].g = g;
 344                 render_buffer[rb_offset].b = b;
 345                 render_buffer[rb_offset].a = a;
 346
 347                 if ( (flags & TMAP_FLAG_PIXEL_FOG) && (OGL_fog_mode == 1) ) {
 348                         float f_val;
 349
 350                         opengl1_stuff_fog_value(va->z, &f_val);
 351
 352                         render_buffer[rb_offset].sr = (ubyte)(((fr * f_val) * 255.0f) + 0.5f);
 353                         render_buffer[rb_offset].sg = (ubyte)(((fg * f_val) * 255.0f) + 0.5f);
 354                         render_buffer[rb_offset].sb = (ubyte)(((fb * f_val) * 255.0f) + 0.5f);
 355                 }
 356
 357                 sx = (va->sx * 16.0f + ox) / 16.0f;
 358                 sy = (va->sy * 16.0f + oy) / 16.0f;
 359
 360                 if (flags & TMAP_FLAG_TEXTURED) {
 361                         render_buffer[rb_offset].u = va->u * u_scale;
 362                         render_buffer[rb_offset].v = va->v * v_scale;
 363                 }
 364
 365                 render_buffer[rb_offset].x = sx * rhw;
 366                 render_buffer[rb_offset].y = sy * rhw;
 367                 render_buffer[rb_offset].z = -sz * rhw;
 368                 render_buffer[rb_offset].w = rhw;
 369
 370                 ++rb_offset;
 371         }
 372
 373         if (flags & TMAP_FLAG_TEXTURED) {
 374                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 375                 glTexCoordPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].u);
 376         }
 377
 378         if ( (gr_screen.current_fog_mode != GR_FOGMODE_NONE) && (OGL_fog_mode == 1) ) {
 379                 glEnableClientState(GL_SECONDARY_COLOR_ARRAY);
 380                 vglSecondaryColorPointer(3, GL_UNSIGNED_BYTE, sizeof(rb_t), &render_buffer[0].sr);
 381         }
 382
 383         glEnableClientState(GL_COLOR_ARRAY);
 384         glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(rb_t), &render_buffer[0].r);
 385
 386         glEnableClientState(GL_VERTEX_ARRAY);
 387         glVertexPointer(4, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 388
 389         glDrawArrays(GL_TRIANGLE_FAN, 0, rb_offset);
 390
 391         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 392         glDisableClientState(GL_SECONDARY_COLOR_ARRAY);
 393         glDisableClientState(GL_COLOR_ARRAY);
 394         glDisableClientState(GL_VERTEX_ARRAY);
 395 }
 396
 397 void gr_opengl1_rect(int x,int y,int w,int h)
 398 {
 399         opengl1_rect_internal(x, y, w, h, gr_screen.current_color.red,
 400                         gr_screen.current_color.green, gr_screen.current_color.blue,
 401                         gr_screen.current_color.alpha);
 402 }
 403
 404 void gr_opengl1_shade(int x,int y,int w,int h)
 405 {
 406         int r,g,b,a;
 407
 408         float shade1 = 1.0f;
 409         float shade2 = 6.0f;
 410
 411         r = fl2i(gr_screen.current_shader.r*255.0f*shade1);
 412         if ( r < 0 ) r = 0; else if ( r > 255 ) r = 255;
 413         g = fl2i(gr_screen.current_shader.g*255.0f*shade1);
 414         if ( g < 0 ) g = 0; else if ( g > 255 ) g = 255;
 415         b = fl2i(gr_screen.current_shader.b*255.0f*shade1);
 416         if ( b < 0 ) b = 0; else if ( b > 255 ) b = 255;
 417         a = fl2i(gr_screen.current_shader.c*255.0f*shade2);
 418         if ( a < 0 ) a = 0; else if ( a > 255 ) a = 255;
 419
 420         opengl1_rect_internal(x, y, w, h, r, g, b, a);
 421 }
 422
 423 void gr_opengl1_aabitmap_ex(int x,int y,int w,int h,int sx,int sy)
 424 {
 425         int reclip;
 426         #ifndef NDEBUG
 427         int count = 0;
 428         #endif
 429
 430         int dx1=x, dx2=x+w-1;
 431         int dy1=y, dy2=y+h-1;
 432
 433         int bw, bh;
 434         bm_get_info( gr_screen.current_bitmap, &bw, &bh, NULL );
 435
 436         do {
 437                 reclip = 0;
 438                 #ifndef NDEBUG
 439                         if ( count > 1 ) Int3();
 440                         count++;
 441                 #endif
 442
 443                 if ((dx1 > gr_screen.clip_right ) || (dx2 < gr_screen.clip_left)) return;
 444                 if ((dy1 > gr_screen.clip_bottom ) || (dy2 < gr_screen.clip_top)) return;
 445                 if ( dx1 < gr_screen.clip_left ) { sx += gr_screen.clip_left-dx1; dx1 = gr_screen.clip_left; }
 446                 if ( dy1 < gr_screen.clip_top ) { sy += gr_screen.clip_top-dy1; dy1 = gr_screen.clip_top; }
 447                 if ( dx2 > gr_screen.clip_right )       { dx2 = gr_screen.clip_right; }
 448                 if ( dy2 > gr_screen.clip_bottom )      { dy2 = gr_screen.clip_bottom; }
 449
 450                 if ( sx < 0 ) {
 451                         dx1 -= sx;
 452                         sx = 0;
 453                         reclip = 1;
 454                 }
 455
 456                 if ( sy < 0 ) {
 457                         dy1 -= sy;
 458                         sy = 0;
 459                         reclip = 1;
 460                 }
 461
 462                 w = dx2-dx1+1;
 463                 h = dy2-dy1+1;
 464
 465                 if ( sx + w > bw ) {
 466                         w = bw - sx;
 467                         dx2 = dx1 + w - 1;
 468                 }
 469
 470                 if ( sy + h > bh ) {
 471                         h = bh - sy;
 472                         dy2 = dy1 + h - 1;
 473                 }
 474
 475                 if ( w < 1 ) return;            // clipped away!
 476                 if ( h < 1 ) return;            // clipped away!
 477
 478         } while (reclip);
 479
 480         // Make sure clipping algorithm works
 481         #ifndef NDEBUG
 482                 SDL_assert( w > 0 );
 483                 SDL_assert( h > 0 );
 484                 SDL_assert( w == (dx2-dx1+1) );
 485                 SDL_assert( h == (dy2-dy1+1) );
 486                 SDL_assert( sx >= 0 );
 487                 SDL_assert( sy >= 0 );
 488                 SDL_assert( sx+w <= bw );
 489                 SDL_assert( sy+h <= bh );
 490                 SDL_assert( dx2 >= dx1 );
 491                 SDL_assert( dy2 >= dy1 );
 492                 SDL_assert( (dx1 >= gr_screen.clip_left ) && (dx1 <= gr_screen.clip_right) );
 493                 SDL_assert( (dx2 >= gr_screen.clip_left ) && (dx2 <= gr_screen.clip_right) );
 494                 SDL_assert( (dy1 >= gr_screen.clip_top ) && (dy1 <= gr_screen.clip_bottom) );
 495                 SDL_assert( (dy2 >= gr_screen.clip_top ) && (dy2 <= gr_screen.clip_bottom) );
 496         #endif
 497
 498         // We now have dx1,dy1 and dx2,dy2 and sx, sy all set validly within clip regions.
 499         opengl1_aabitmap_ex_internal(dx1,dy1,dx2-dx1+1,dy2-dy1+1,sx,sy);
 500 }
 501
 502 void gr_opengl1_aabitmap(int x, int y)
 503 {
 504         int w, h;
 505
 506         bm_get_info( gr_screen.current_bitmap, &w, &h, NULL );
 507         int dx1=x, dx2=x+w-1;
 508         int dy1=y, dy2=y+h-1;
 509         int sx=0, sy=0;
 510
 511         if ((dx1 > gr_screen.clip_right ) || (dx2 < gr_screen.clip_left)) return;
 512         if ((dy1 > gr_screen.clip_bottom ) || (dy2 < gr_screen.clip_top)) return;
 513         if ( dx1 < gr_screen.clip_left ) { sx = gr_screen.clip_left-dx1; dx1 = gr_screen.clip_left; }
 514         if ( dy1 < gr_screen.clip_top ) { sy = gr_screen.clip_top-dy1; dy1 = gr_screen.clip_top; }
 515         if ( dx2 > gr_screen.clip_right )       { dx2 = gr_screen.clip_right; }
 516         if ( dy2 > gr_screen.clip_bottom )      { dy2 = gr_screen.clip_bottom; }
 517
 518         if ( sx < 0 ) return;
 519         if ( sy < 0 ) return;
 520         if ( sx >= w ) return;
 521         if ( sy >= h ) return;
 522
 523         // Draw bitmap bm[sx,sy] into (dx1,dy1)-(dx2,dy2)
 524         gr_opengl1_aabitmap_ex(dx1,dy1,dx2-dx1+1,dy2-dy1+1,sx,sy);
 525 }
 526
 527 void gr_opengl1_string( int sx, int sy, const char *s )
 528 {
 529         int width, spacing, letter;
 530         int x, y;
 531         int rb_offset;
 532         float u_scale, v_scale;
 533         float u0, u1, v0, v1;
 534         float x1, x2, y1, y2;
 535         int bw, bh;
 536         float fbw, fbh;
 537
 538         if ( !Current_font )    {
 539                 return;
 540         }
 541
 542         gr_set_bitmap(Current_font->bitmap_id, GR_ALPHABLEND_NONE, GR_BITBLT_MODE_NORMAL, 1.0f, -1, -1);
 543
 544         if ( !opengl1_tcache_set( gr_screen.current_bitmap, TCACHE_TYPE_AABITMAP, &u_scale, &v_scale, 0, -1, -1, 0 ) )  {
 545                 // Couldn't set texture
 546                 mprintf(( "WARNING: Error setting aabitmap texture!\n" ));
 547                 return;
 548         }
 549
 550         bm_get_info( gr_screen.current_bitmap, &bw, &bh );
 551
 552         fbw = 1.0f / i2fl(bw);
 553         fbh = 1.0f / i2fl(bh);
 554
 555         opengl1_set_state( TEXTURE_SOURCE_NO_FILTERING, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
 556
 557         // don't want to create a super huge buffer size (i.e. credits text)
 558         const int alocsize = 320;       // 80 characters max per render call
 559         opengl_alloc_render_buffer(alocsize);
 560
 561         glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
 562                         gr_screen.current_color.blue, gr_screen.current_color.alpha);
 563
 564         glEnableClientState(GL_VERTEX_ARRAY);
 565         glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 566
 567         glVertexPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 568         glTexCoordPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].u);
 569
 570         y = sy;
 571
 572         if (sx==0x8000) {                       //centered
 573                 x = get_centered_x(s);
 574         } else {
 575                 x = sx;
 576         }
 577
 578         spacing = 0;
 579         rb_offset = 0;
 580
 581         while (*s)      {
 582                 x += spacing;
 583
 584                 while (*s== '\n' )      {
 585                         s++;
 586                         y += Current_font->h;
 587                         if (sx==0x8000) {                       //centered
 588                                 x = get_centered_x(s);
 589                         } else {
 590                                 x = sx;
 591                         }
 592                 }
 593                 if (*s == 0 ) break;
 594
 595                 letter = get_char_width(s[0],s[1],&width,&spacing);
 596                 s++;
 597
 598                 //not in font, draw as space
 599                 if (letter<0)   {
 600                         continue;
 601                 }
 602
 603                 int xd, yd, xc, yc;
 604                 int wc, hc;
 605
 606                 // Check if this character is totally clipped
 607                 if ( x + width < gr_screen.clip_left ) continue;
 608                 if ( y + Current_font->h < gr_screen.clip_top ) continue;
 609                 if ( x > gr_screen.clip_right ) continue;
 610                 if ( y > gr_screen.clip_bottom ) continue;
 611
 612                 xd = yd = 0;
 613                 if ( x < gr_screen.clip_left ) xd = gr_screen.clip_left - x;
 614                 if ( y < gr_screen.clip_top ) yd = gr_screen.clip_top - y;
 615                 xc = x+xd;
 616                 yc = y+yd;
 617
 618                 wc = width - xd; hc = Current_font->h - yd;
 619                 if ( xc + wc > gr_screen.clip_right ) wc = gr_screen.clip_right - xc;
 620                 if ( yc + hc > gr_screen.clip_bottom ) hc = gr_screen.clip_bottom - yc;
 621
 622                 if ( wc < 1 ) continue;
 623                 if ( hc < 1 ) continue;
 624
 625                 float u = i2fl(Current_font->bm_u[letter] + xd);
 626                 float v = i2fl(Current_font->bm_v[letter] + yd);
 627
 628                 x1 = i2fl(xc + gr_screen.offset_x);
 629                 y1 = i2fl(yc + gr_screen.offset_y);
 630                 x2 = x1 + i2fl(wc);
 631                 y2 = y1 + i2fl(hc);
 632
 633                 u0 = u_scale * (u * fbw);
 634                 v0 = v_scale * (v * fbh);
 635
 636                 u1 = u_scale * ((u+i2fl(wc)) * fbw);
 637                 v1 = v_scale * ((v+i2fl(hc)) * fbh);
 638
 639                 // maybe go ahead and draw
 640                 if (rb_offset == alocsize) {
 641                         glDrawArrays(GL_TRIANGLE_STRIP, 0, rb_offset);
 642                         rb_offset = 0;
 643                 }
 644
 645                 render_buffer[rb_offset].x = x1;
 646                 render_buffer[rb_offset].y = y1;
 647                 render_buffer[rb_offset].u = u0;
 648                 render_buffer[rb_offset].v = v0;
 649                 ++rb_offset;
 650
 651                 render_buffer[rb_offset].x = x1;
 652                 render_buffer[rb_offset].y = y2;
 653                 render_buffer[rb_offset].u = u0;
 654                 render_buffer[rb_offset].v = v1;
 655                 ++rb_offset;
 656
 657                 render_buffer[rb_offset].x = x2;
 658                 render_buffer[rb_offset].y = y1;
 659                 render_buffer[rb_offset].u = u1;
 660                 render_buffer[rb_offset].v = v0;
 661                 ++rb_offset;
 662
 663                 render_buffer[rb_offset].x = x2;
 664                 render_buffer[rb_offset].y = y2;
 665                 render_buffer[rb_offset].u = u1;
 666                 render_buffer[rb_offset].v = v1;
 667                 ++rb_offset;
 668         }
 669
 670         if (rb_offset) {
 671                 glDrawArrays(GL_TRIANGLE_STRIP, 0, rb_offset);
 672         }
 673
 674         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 675         glDisableClientState(GL_VERTEX_ARRAY);
 676 }
 677
 678 void gr_opengl1_line(int x1,int y1,int x2,int y2)
 679 {
 680         opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
 681
 682         INT_CLIPLINE(x1,y1,x2,y2,gr_screen.clip_left,gr_screen.clip_top,
 683                         gr_screen.clip_right,gr_screen.clip_bottom,return,void(),void());
 684
 685         float sx1, sy1;
 686         float sx2, sy2;
 687
 688         sx1 = i2fl(x1 + gr_screen.offset_x)+0.5f;
 689         sy1 = i2fl(y1 + gr_screen.offset_y)+0.5f;
 690         sx2 = i2fl(x2 + gr_screen.offset_x)+0.5f;
 691         sy2 = i2fl(y2 + gr_screen.offset_y)+0.5f;
 692
 693         opengl_alloc_render_buffer(2);
 694
 695         if ( x1 == x2 && y1 == y2 ) {
 696                 render_buffer[0].x = sx1;
 697                 render_buffer[0].y = sy1;
 698                 render_buffer[0].z = -0.99f;
 699
 700                 glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
 701                                 gr_screen.current_color.blue, gr_screen.current_color.alpha);
 702
 703                 glEnableClientState(GL_VERTEX_ARRAY);
 704                 glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 705
 706                 glDrawArrays(GL_POINTS, 0, 1);
 707
 708                 glDisableClientState(GL_VERTEX_ARRAY);
 709
 710                 return;
 711         }
 712
 713         if ( x1 == x2 ) {
 714                 if ( sy1 < sy2 )    {
 715                         sy2 += 0.5f;
 716                 } else {
 717                         sy1 += 0.5f;
 718                 }
 719         } else if ( y1 == y2 )  {
 720                 if ( sx1 < sx2 )    {
 721                         sx2 += 0.5f;
 722                 } else {
 723                         sx1 += 0.5f;
 724                 }
 725         }
 726
 727         render_buffer[0].x = sx2;
 728         render_buffer[0].y = sy2;
 729         render_buffer[0].z = -0.99f;
 730
 731         render_buffer[1].x = sx1;
 732         render_buffer[1].y = sy1;
 733         render_buffer[1].z = -0.99f;
 734
 735         glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
 736                         gr_screen.current_color.blue, gr_screen.current_color.alpha);
 737
 738         glEnableClientState(GL_VERTEX_ARRAY);
 739         glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 740
 741         glDrawArrays(GL_LINES, 0, 2);
 742
 743         glDisableClientState(GL_VERTEX_ARRAY);
 744 }
 745
 746 void gr_opengl1_aaline(vertex *v1, vertex *v2)
 747 {
 748         gr_opengl1_line( fl2i(v1->sx), fl2i(v1->sy), fl2i(v2->sx), fl2i(v2->sy) );
 749 }
 750
 751 void gr_opengl1_gradient(int x1,int y1,int x2,int y2)
 752 {
 753         int swapped=0;
 754
 755         if ( !gr_screen.current_color.is_alphacolor )   {
 756                 gr_line( x1, y1, x2, y2 );
 757                 return;
 758         }
 759
 760         INT_CLIPLINE(x1,y1,x2,y2,gr_screen.clip_left,gr_screen.clip_top,
 761                         gr_screen.clip_right,gr_screen.clip_bottom,return,void(),swapped=1);
 762
 763         opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
 764
 765         int aa = swapped ? 0 : gr_screen.current_color.alpha;
 766         int ba = swapped ? gr_screen.current_color.alpha : 0;
 767
 768         float sx1, sy1;
 769         float sx2, sy2;
 770
 771         sx1 = i2fl(x1 + gr_screen.offset_x)+0.5f;
 772         sy1 = i2fl(y1 + gr_screen.offset_y)+0.5f;
 773         sx2 = i2fl(x2 + gr_screen.offset_x)+0.5f;
 774         sy2 = i2fl(y2 + gr_screen.offset_y)+0.5f;
 775
 776         if ( x1 == x2 ) {
 777                 if ( sy1 < sy2 )    {
 778                         sy2 += 0.5f;
 779                 } else {
 780                         sy1 += 0.5f;
 781                 }
 782         } else if ( y1 == y2 )  {
 783                 if ( sx1 < sx2 )    {
 784                         sx2 += 0.5f;
 785                 } else {
 786                         sx1 += 0.5f;
 787                 }
 788         }
 789
 790         opengl_alloc_render_buffer(2);
 791
 792         render_buffer[0].r = gr_screen.current_color.red;
 793         render_buffer[0].g = gr_screen.current_color.green;
 794         render_buffer[0].b = gr_screen.current_color.blue;
 795         render_buffer[0].a = (ubyte)ba;
 796         render_buffer[0].x = sx2;
 797         render_buffer[0].y = sy2;
 798         render_buffer[0].z = -0.99f;
 799
 800         render_buffer[1].r = gr_screen.current_color.red;
 801         render_buffer[1].g = gr_screen.current_color.green;
 802         render_buffer[1].b = gr_screen.current_color.blue;
 803         render_buffer[1].a = (ubyte)aa;
 804         render_buffer[1].x = sx1;
 805         render_buffer[1].y = sy1;
 806         render_buffer[1].z = -0.99f;
 807
 808         glEnableClientState(GL_COLOR_ARRAY);
 809         glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(rb_t), &render_buffer[0].r);
 810
 811         glEnableClientState(GL_VERTEX_ARRAY);
 812         glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 813
 814         glDrawArrays(GL_LINES, 0, 2);
 815
 816         glDisableClientState(GL_COLOR_ARRAY);
 817         glDisableClientState(GL_VERTEX_ARRAY);
 818 }
 819
 820 void gr_opengl1_circle( int xc, int yc, int d )
 821 {
 822         int p,x, y, r;
 823
 824         r = d/2;
 825         p=3-d;
 826         x=0;
 827         y=r;
 828
 829         // Big clip
 830         if ( (xc+r) < gr_screen.clip_left ) return;
 831         if ( (xc-r) > gr_screen.clip_right ) return;
 832         if ( (yc+r) < gr_screen.clip_top ) return;
 833         if ( (yc-r) > gr_screen.clip_bottom ) return;
 834
 835         while(x<y)      {
 836                 // Draw the first octant
 837                 gr_opengl1_line( xc-y, yc-x, xc+y, yc-x );
 838                 gr_opengl1_line( xc-y, yc+x, xc+y, yc+x );
 839
 840                 if (p<0)
 841                         p=p+(x<<2)+6;
 842                 else    {
 843                         // Draw the second octant
 844                         gr_opengl1_line( xc-x, yc-y, xc+x, yc-y );
 845                         gr_opengl1_line( xc-x, yc+y, xc+x, yc+y );
 846
 847                         p=p+((x-y)<<2)+10;
 848                         y--;
 849                 }
 850                 x++;
 851         }
 852         if(x==y) {
 853                 gr_opengl1_line( xc-x, yc-y, xc+x, yc-y );
 854                 gr_opengl1_line( xc-x, yc+y, xc+x, yc+y );
 855         }
 856         return;
 857 }
 858
 859 void gr_opengl1_pixel(int x, int y)
 860 {
 861         gr_line(x,y,x,y);
 862 }
 863
 864
 865 // cross fade
 866 void gr_opengl1_cross_fade(int bmap1, int bmap2, int x1, int y1, int x2, int y2, float pct)
 867 {
 868         gr_set_bitmap(bmap1, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, 1.0f - pct );
 869         gr_bitmap(x1, y1);
 870
 871         gr_set_bitmap(bmap2, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, pct );
 872         gr_bitmap(x2, y2);
 873 }
 874
 875 void gr_opengl1_flash(int r, int g, int b)
 876 {
 877         CAP(r,0,255);
 878         CAP(g,0,255);
 879         CAP(b,0,255);
 880
 881         if ( r || g || b ) {
 882                 opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_ALPHA_ADDITIVE, ZBUFFER_TYPE_NONE );
 883
 884                 float x1, x2, y1, y2;
 885                 x1 = i2fl(gr_screen.clip_left+gr_screen.offset_x);
 886                 y1 = i2fl(gr_screen.clip_top+gr_screen.offset_y);
 887                 x2 = i2fl(gr_screen.clip_right+gr_screen.offset_x);
 888                 y2 = i2fl(gr_screen.clip_bottom+gr_screen.offset_y);
 889
 890                 glColor4ub((GLubyte)r, (GLubyte)g, (GLubyte)b, 255);
 891
 892                 opengl_alloc_render_buffer(4);
 893
 894                 render_buffer[0].x = x1;
 895                 render_buffer[0].y = y1;
 896                 render_buffer[0].z = -0.99f;
 897
 898                 render_buffer[1].x = x1;
 899                 render_buffer[1].y = y2;
 900                 render_buffer[1].z = -0.99f;
 901
 902                 render_buffer[2].x = x2;
 903                 render_buffer[2].y = y1;
 904                 render_buffer[2].z = -0.99f;
 905
 906                 render_buffer[3].x = x2;
 907                 render_buffer[3].y = y2;
 908                 render_buffer[3].z = -0.99f;
 909
 910                 glEnableClientState(GL_VERTEX_ARRAY);
 911                 glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 912
 913                 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 914
 915                 glDisableClientState(GL_VERTEX_ARRAY);
 916         }
 917 }
 918
 919 void gr_opengl1_tmapper( int nverts, vertex **verts, uint flags )
 920 {
 921         opengl1_tmapper_internal( nverts, verts, flags, 0 );
 922 }
 923
 924 #define FIND_SCALED_NUM(x,x0,x1,y0,y1) (((((x)-(x0))*((y1)-(y0)))/((x1)-(x0)))+(y0))
 925
 926 void gr_opengl1_scaler(vertex *va, vertex *vb )
 927 {
 928         float x0, y0, x1, y1;
 929         float u0, v0, u1, v1;
 930         float clipped_x0, clipped_y0, clipped_x1, clipped_y1;
 931         float clipped_u0, clipped_v0, clipped_u1, clipped_v1;
 932         float xmin, xmax, ymin, ymax;
 933         int dx0, dy0, dx1, dy1;
 934
 935         //============= CLIP IT =====================
 936
 937         x0 = va->sx; y0 = va->sy;
 938         x1 = vb->sx; y1 = vb->sy;
 939
 940         xmin = i2fl(gr_screen.clip_left); ymin = i2fl(gr_screen.clip_top);
 941         xmax = i2fl(gr_screen.clip_right); ymax = i2fl(gr_screen.clip_bottom);
 942
 943         u0 = va->u; v0 = va->v;
 944         u1 = vb->u; v1 = vb->v;
 945
 946         // Check for obviously offscreen bitmaps...
 947         if ( (y1<=y0) || (x1<=x0) ) return;
 948         if ( (x1<xmin ) || (x0>xmax) ) return;
 949         if ( (y1<ymin ) || (y0>ymax) ) return;
 950
 951         clipped_u0 = u0; clipped_v0 = v0;
 952         clipped_u1 = u1; clipped_v1 = v1;
 953
 954         clipped_x0 = x0; clipped_y0 = y0;
 955         clipped_x1 = x1; clipped_y1 = y1;
 956
 957         // Clip the left, moving u0 right as necessary
 958         if ( x0 < xmin )        {
 959                 clipped_u0 = FIND_SCALED_NUM(xmin,x0,x1,u0,u1);
 960                 clipped_x0 = xmin;
 961         }
 962
 963         // Clip the right, moving u1 left as necessary
 964         if ( x1 > xmax )        {
 965                 clipped_u1 = FIND_SCALED_NUM(xmax,x0,x1,u0,u1);
 966                 clipped_x1 = xmax;
 967         }
 968
 969         // Clip the top, moving v0 down as necessary
 970         if ( y0 < ymin )        {
 971                 clipped_v0 = FIND_SCALED_NUM(ymin,y0,y1,v0,v1);
 972                 clipped_y0 = ymin;
 973         }
 974
 975         // Clip the bottom, moving v1 up as necessary
 976         if ( y1 > ymax )        {
 977                 clipped_v1 = FIND_SCALED_NUM(ymax,y0,y1,v0,v1);
 978                 clipped_y1 = ymax;
 979         }
 980
 981         dx0 = fl2i(clipped_x0); dx1 = fl2i(clipped_x1);
 982         dy0 = fl2i(clipped_y0); dy1 = fl2i(clipped_y1);
 983
 984         if (dx1<=dx0) return;
 985         if (dy1<=dy0) return;
 986
 987         //============= DRAW IT =====================
 988
 989         vertex v[4];
 990         vertex *vl[4];
 991
 992         vl[0] = &v[0];
 993         v[0].sx = clipped_x0;
 994         v[0].sy = clipped_y0;
 995         v[0].sw = va->sw;
 996         v[0].z = va->z;
 997         v[0].u = clipped_u0;
 998         v[0].v = clipped_v0;
 999
1000         vl[1] = &v[1];
1001         v[1].sx = clipped_x1;
1002         v[1].sy = clipped_y0;
1003         v[1].sw = va->sw;
1004         v[1].z = va->z;
1005         v[1].u = clipped_u1;
1006         v[1].v = clipped_v0;
1007
1008         vl[2] = &v[2];
1009         v[2].sx = clipped_x1;
1010         v[2].sy = clipped_y1;
1011         v[2].sw = va->sw;
1012         v[2].z = va->z;
1013         v[2].u = clipped_u1;
1014         v[2].v = clipped_v1;
1015
1016         vl[3] = &v[3];
1017         v[3].sx = clipped_x0;
1018         v[3].sy = clipped_y1;
1019         v[3].sw = va->sw;
1020         v[3].z = va->z;
1021         v[3].u = clipped_u0;
1022         v[3].v = clipped_v1;
1023
1024         opengl1_tmapper_internal( 4, vl, TMAP_FLAG_TEXTURED, 1 );
1025 }