src/graphics/gropengl1render.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 "gropengl1.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 = y2;
 145         render_buffer[0].u = u0;
 146         render_buffer[0].v = v1;
 147
 148         render_buffer[1].x = x2;
 149         render_buffer[1].y = y2;
 150         render_buffer[1].u = u1;
 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 = x1;
 159         render_buffer[3].y = y1;
 160         render_buffer[3].u = u0;
 161         render_buffer[3].v = v0;
 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_QUADS, 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         // Make nebula use the texture mapper... this blends the colors better.
 200         if ( flags & TMAP_FLAG_NEBULA ){
 201                 Int3 ();
 202         }
 203
 204         gr_texture_source texture_source = (gr_texture_source)-1;
 205         gr_alpha_blend alpha_blend = (gr_alpha_blend)-1;
 206         gr_zbuffer_type zbuffer_type = (gr_zbuffer_type)-1;
 207
 208         if (Gr_zbuffering) {
 209                 if ( is_scaler || (gr_screen.current_alphablend_mode == GR_ALPHABLEND_FILTER) ) {
 210                         zbuffer_type = ZBUFFER_TYPE_READ;
 211                 } else {
 212                         zbuffer_type = ZBUFFER_TYPE_FULL;
 213                 }
 214         } else {
 215                 zbuffer_type = ZBUFFER_TYPE_NONE;
 216         }
 217
 218         int alpha;
 219
 220         int tmap_type = TCACHE_TYPE_NORMAL;
 221
 222         int r, g, b;
 223
 224         if ( flags & TMAP_FLAG_TEXTURED )       {
 225                 r = g = b = 255;
 226         } else {
 227                 r = gr_screen.current_color.red;
 228                 g = gr_screen.current_color.green;
 229                 b = gr_screen.current_color.blue;
 230         }
 231
 232         if (gr_screen.current_alphablend_mode == GR_ALPHABLEND_FILTER) {
 233                 tmap_type = TCACHE_TYPE_NORMAL;
 234                 alpha_blend = ALPHA_BLEND_ALPHA_ADDITIVE;
 235
 236                 // Blend with screen pixel using src*alpha+dst
 237
 238                 alpha = 255;
 239
 240                 if (gr_screen.current_alpha <= 1.0f)   {
 241                         r = fl2i((r * gr_screen.current_alpha) + 0.5f);
 242                         g = fl2i((g * gr_screen.current_alpha) + 0.5f);
 243                         b = fl2i((b * gr_screen.current_alpha) + 0.5f);
 244                 }
 245         } else {
 246                 alpha_blend = ALPHA_BLEND_ALPHA_BLEND_ALPHA;
 247                 alpha = 255;
 248         }
 249
 250         if (flags & TMAP_FLAG_BITMAP_SECTION) {
 251                 Assert( !(flags & TMAP_FLAG_BITMAP_INTERFACE) );
 252                 tmap_type = TCACHE_TYPE_BITMAP_SECTION;
 253         } else if (flags & TMAP_FLAG_BITMAP_INTERFACE) {
 254                 Assert( !(flags & TMAP_FLAG_BITMAP_SECTION) );
 255                 tmap_type = TCACHE_TYPE_BITMAP_INTERFACE;
 256         }
 257
 258         texture_source = TEXTURE_SOURCE_NONE;
 259
 260         if (flags & TMAP_FLAG_TEXTURED) {
 261                 if ( !opengl1_tcache_set(gr_screen.current_bitmap, tmap_type, &u_scale,
 262                                 &v_scale, 0, gr_screen.current_bitmap_sx, gr_screen.current_bitmap_sy, 0) )
 263                 {
 264                         mprintf(( "Not rendering a texture because it didn't fit in VRAM!\n" ));
 265                         return;
 266                 }
 267
 268                 // use non-filtered textures for bitmap sections and UI graphics
 269                 switch (tmap_type) {
 270                         case TCACHE_TYPE_BITMAP_INTERFACE:
 271                         case TCACHE_TYPE_BITMAP_SECTION:
 272                                 texture_source = TEXTURE_SOURCE_NO_FILTERING;
 273                                 break;
 274
 275                         default:
 276                                 texture_source = TEXTURE_SOURCE_DECAL;
 277                                 break;
 278                 }
 279         }
 280
 281
 282         opengl1_set_state( texture_source, alpha_blend, zbuffer_type );
 283
 284         float fr = 1.0f, fg = 1.0f, fb = 1.0f;
 285
 286         if (flags & TMAP_FLAG_PIXEL_FOG) {
 287                 int r, g, b;
 288                 int ra, ga, ba;
 289                 ra = ga = ba = 0;
 290
 291                 /* argh */
 292                 for (i=nv-1;i>=0;i--)   // DDOI - change polygon winding
 293                 {
 294                         vertex * va = verts[i];
 295                         float sx, sy;
 296
 297                         int x, y;
 298                         x = fl2i(va->sx*16.0f);
 299                         y = fl2i(va->sy*16.0f);
 300
 301                         x += gr_screen.offset_x*16;
 302                         y += gr_screen.offset_y*16;
 303
 304                         sx = i2fl(x) / 16.0f;
 305                         sy = i2fl(y) / 16.0f;
 306
 307                         neb2_get_pixel((int)sx, (int)sy, &r, &g, &b);
 308
 309                         ra += r;
 310                         ga += g;
 311                         ba += b;
 312                 }
 313
 314                 ra /= nv;
 315                 ga /= nv;
 316                 ba /= nv;
 317
 318                 gr_fog_set(GR_FOGMODE_FOG, ra, ga, ba, -1.0f, -1.0f);
 319
 320                 fr = ra / 255.0f;
 321                 fg = ga / 255.0f;
 322                 fb = ba / 255.0f;
 323         }
 324
 325         opengl_alloc_render_buffer(nv);
 326
 327         int rb_offset = 0;
 328
 329         for (i = nv-1; i >= 0; i--) {
 330                 vertex * va = verts[i];
 331                 float sx, sy, sz;
 332                 float rhw = 1.0f;
 333                 int a;
 334
 335                 if ( Gr_zbuffering || (flags & TMAP_FLAG_NEBULA) ) {
 336                         sz = 1.0 - 1.0 / (1.0 + va->z / (32768.0 / 256.0));
 337
 338                         if ( sz > 0.98f ) {
 339                                 sz = 0.98f;
 340                         }
 341                 } else {
 342                         sz = 0.99f;
 343                 }
 344
 345                 if ( flags & TMAP_FLAG_CORRECT )        {
 346                         rhw /= va->sw;
 347                 }
 348
 349                 if (flags & TMAP_FLAG_ALPHA) {
 350                         a = verts[i]->a;
 351                 } else {
 352                         a = alpha;
 353                 }
 354
 355                 if (flags & TMAP_FLAG_NEBULA ) {
 356                         int pal = (verts[i]->b*(NEBULA_COLORS-1))/255;
 357                         r = gr_palette[pal*3+0];
 358                         g = gr_palette[pal*3+1];
 359                         b = gr_palette[pal*3+2];
 360                 } else if ( (flags & TMAP_FLAG_RAMP) && (flags & TMAP_FLAG_GOURAUD) )   {
 361                         r = Gr_gamma_lookup[verts[i]->b];
 362                         g = Gr_gamma_lookup[verts[i]->b];
 363                         b = Gr_gamma_lookup[verts[i]->b];
 364                 } else if ( (flags & TMAP_FLAG_RGB)  && (flags & TMAP_FLAG_GOURAUD) )   {
 365                         // Make 0.75 be 256.0f
 366                         r = Gr_gamma_lookup[verts[i]->r];
 367                         g = Gr_gamma_lookup[verts[i]->g];
 368                         b = Gr_gamma_lookup[verts[i]->b];
 369                 } else {
 370                         // use constant RGB values...
 371                 }
 372
 373                 render_buffer[rb_offset].r = r;
 374                 render_buffer[rb_offset].g = g;
 375                 render_buffer[rb_offset].b = b;
 376                 render_buffer[rb_offset].a = a;
 377
 378                 if ( (gr_screen.current_fog_mode != GR_FOGMODE_NONE) && (OGL_fog_mode == 1) ) {
 379                         float f_val;
 380
 381                         opengl1_stuff_fog_value(va->z, &f_val);
 382
 383                         render_buffer[rb_offset].sr = fl2i(((fr * f_val) * 255.0f) + 0.5f);
 384                         render_buffer[rb_offset].sg = fl2i(((fg * f_val) * 255.0f) + 0.5f);
 385                         render_buffer[rb_offset].sb = fl2i(((fb * f_val) * 255.0f) + 0.5f);
 386                 }
 387
 388                 int x, y;
 389                 x = fl2i(va->sx*16.0f);
 390                 y = fl2i(va->sy*16.0f);
 391
 392                 x += gr_screen.offset_x*16;
 393                 y += gr_screen.offset_y*16;
 394
 395                 sx = i2fl(x) / 16.0f;
 396                 sy = i2fl(y) / 16.0f;
 397
 398                 if ( flags & TMAP_FLAG_TEXTURED )       {
 399                         render_buffer[rb_offset].u = va->u * u_scale;
 400                         render_buffer[rb_offset].v = va->v * v_scale;
 401                 }
 402
 403                 render_buffer[rb_offset].x = sx * rhw;
 404                 render_buffer[rb_offset].y = sy * rhw;
 405                 render_buffer[rb_offset].z = -sz * rhw;
 406                 render_buffer[rb_offset].w = rhw;
 407
 408                 ++rb_offset;
 409         }
 410
 411         if (flags & TMAP_FLAG_TEXTURED) {
 412                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 413                 glTexCoordPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].u);
 414         }
 415
 416         if ( (gr_screen.current_fog_mode != GR_FOGMODE_NONE) && (OGL_fog_mode == 1) ) {
 417                 glEnableClientState(GL_SECONDARY_COLOR_ARRAY);
 418                 vglSecondaryColorPointer(3, GL_UNSIGNED_BYTE, sizeof(rb_t), &render_buffer[0].sr);
 419         }
 420
 421         glEnableClientState(GL_COLOR_ARRAY);
 422         glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(rb_t), &render_buffer[0].r);
 423
 424         glEnableClientState(GL_VERTEX_ARRAY);
 425         glVertexPointer(4, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 426
 427         glDrawArrays(GL_TRIANGLE_FAN, 0, rb_offset);
 428
 429         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 430         glDisableClientState(GL_SECONDARY_COLOR_ARRAY);
 431         glDisableClientState(GL_COLOR_ARRAY);
 432         glDisableClientState(GL_VERTEX_ARRAY);
 433 }
 434
 435 void gr_opengl1_rect(int x,int y,int w,int h)
 436 {
 437         opengl1_rect_internal(x, y, w, h, gr_screen.current_color.red,
 438                         gr_screen.current_color.green, gr_screen.current_color.blue,
 439                         gr_screen.current_color.alpha);
 440 }
 441
 442 void gr_opengl1_shade(int x,int y,int w,int h)
 443 {
 444         int r,g,b,a;
 445
 446         float shade1 = 1.0f;
 447         float shade2 = 6.0f;
 448
 449         r = fl2i(gr_screen.current_shader.r*255.0f*shade1);
 450         if ( r < 0 ) r = 0; else if ( r > 255 ) r = 255;
 451         g = fl2i(gr_screen.current_shader.g*255.0f*shade1);
 452         if ( g < 0 ) g = 0; else if ( g > 255 ) g = 255;
 453         b = fl2i(gr_screen.current_shader.b*255.0f*shade1);
 454         if ( b < 0 ) b = 0; else if ( b > 255 ) b = 255;
 455         a = fl2i(gr_screen.current_shader.c*255.0f*shade2);
 456         if ( a < 0 ) a = 0; else if ( a > 255 ) a = 255;
 457
 458         opengl1_rect_internal(x, y, w, h, r, g, b, a);
 459 }
 460
 461 void gr_opengl1_aabitmap_ex(int x,int y,int w,int h,int sx,int sy)
 462 {
 463         int reclip;
 464         #ifndef NDEBUG
 465         int count = 0;
 466         #endif
 467
 468         int dx1=x, dx2=x+w-1;
 469         int dy1=y, dy2=y+h-1;
 470
 471         int bw, bh;
 472         bm_get_info( gr_screen.current_bitmap, &bw, &bh, NULL );
 473
 474         do {
 475                 reclip = 0;
 476                 #ifndef NDEBUG
 477                         if ( count > 1 ) Int3();
 478                         count++;
 479                 #endif
 480
 481                 if ((dx1 > gr_screen.clip_right ) || (dx2 < gr_screen.clip_left)) return;
 482                 if ((dy1 > gr_screen.clip_bottom ) || (dy2 < gr_screen.clip_top)) return;
 483                 if ( dx1 < gr_screen.clip_left ) { sx += gr_screen.clip_left-dx1; dx1 = gr_screen.clip_left; }
 484                 if ( dy1 < gr_screen.clip_top ) { sy += gr_screen.clip_top-dy1; dy1 = gr_screen.clip_top; }
 485                 if ( dx2 > gr_screen.clip_right )       { dx2 = gr_screen.clip_right; }
 486                 if ( dy2 > gr_screen.clip_bottom )      { dy2 = gr_screen.clip_bottom; }
 487
 488                 if ( sx < 0 ) {
 489                         dx1 -= sx;
 490                         sx = 0;
 491                         reclip = 1;
 492                 }
 493
 494                 if ( sy < 0 ) {
 495                         dy1 -= sy;
 496                         sy = 0;
 497                         reclip = 1;
 498                 }
 499
 500                 w = dx2-dx1+1;
 501                 h = dy2-dy1+1;
 502
 503                 if ( sx + w > bw ) {
 504                         w = bw - sx;
 505                         dx2 = dx1 + w - 1;
 506                 }
 507
 508                 if ( sy + h > bh ) {
 509                         h = bh - sy;
 510                         dy2 = dy1 + h - 1;
 511                 }
 512
 513                 if ( w < 1 ) return;            // clipped away!
 514                 if ( h < 1 ) return;            // clipped away!
 515
 516         } while (reclip);
 517
 518         // Make sure clipping algorithm works
 519         #ifndef NDEBUG
 520                 Assert( w > 0 );
 521                 Assert( h > 0 );
 522                 Assert( w == (dx2-dx1+1) );
 523                 Assert( h == (dy2-dy1+1) );
 524                 Assert( sx >= 0 );
 525                 Assert( sy >= 0 );
 526                 Assert( sx+w <= bw );
 527                 Assert( sy+h <= bh );
 528                 Assert( dx2 >= dx1 );
 529                 Assert( dy2 >= dy1 );
 530                 Assert( (dx1 >= gr_screen.clip_left ) && (dx1 <= gr_screen.clip_right) );
 531                 Assert( (dx2 >= gr_screen.clip_left ) && (dx2 <= gr_screen.clip_right) );
 532                 Assert( (dy1 >= gr_screen.clip_top ) && (dy1 <= gr_screen.clip_bottom) );
 533                 Assert( (dy2 >= gr_screen.clip_top ) && (dy2 <= gr_screen.clip_bottom) );
 534         #endif
 535
 536         // We now have dx1,dy1 and dx2,dy2 and sx, sy all set validly within clip regions.
 537         opengl1_aabitmap_ex_internal(dx1,dy1,dx2-dx1+1,dy2-dy1+1,sx,sy);
 538 }
 539
 540 void gr_opengl1_aabitmap(int x, int y)
 541 {
 542         int w, h;
 543
 544         bm_get_info( gr_screen.current_bitmap, &w, &h, NULL );
 545         int dx1=x, dx2=x+w-1;
 546         int dy1=y, dy2=y+h-1;
 547         int sx=0, sy=0;
 548
 549         if ((dx1 > gr_screen.clip_right ) || (dx2 < gr_screen.clip_left)) return;
 550         if ((dy1 > gr_screen.clip_bottom ) || (dy2 < gr_screen.clip_top)) return;
 551         if ( dx1 < gr_screen.clip_left ) { sx = gr_screen.clip_left-dx1; dx1 = gr_screen.clip_left; }
 552         if ( dy1 < gr_screen.clip_top ) { sy = gr_screen.clip_top-dy1; dy1 = gr_screen.clip_top; }
 553         if ( dx2 > gr_screen.clip_right )       { dx2 = gr_screen.clip_right; }
 554         if ( dy2 > gr_screen.clip_bottom )      { dy2 = gr_screen.clip_bottom; }
 555
 556         if ( sx < 0 ) return;
 557         if ( sy < 0 ) return;
 558         if ( sx >= w ) return;
 559         if ( sy >= h ) return;
 560
 561         // Draw bitmap bm[sx,sy] into (dx1,dy1)-(dx2,dy2)
 562         gr_opengl1_aabitmap_ex(dx1,dy1,dx2-dx1+1,dy2-dy1+1,sx,sy);
 563 }
 564
 565 void gr_opengl1_string( int sx, int sy, const char *s )
 566 {
 567         int width, spacing, letter;
 568         int x, y;
 569         int rb_offset;
 570         float u_scale, v_scale;
 571         float u0, u1, v0, v1;
 572         float x1, x2, y1, y2;
 573         int bw, bh;
 574
 575         if ( !Current_font )    {
 576                 return;
 577         }
 578
 579         gr_set_bitmap(Current_font->bitmap_id, GR_ALPHABLEND_NONE, GR_BITBLT_MODE_NORMAL, 1.0f, -1, -1);
 580
 581         if ( !opengl1_tcache_set( gr_screen.current_bitmap, TCACHE_TYPE_AABITMAP, &u_scale, &v_scale, 0, -1, -1, 0 ) )  {
 582                 // Couldn't set texture
 583                 mprintf(( "WARNING: Error setting aabitmap texture!\n" ));
 584                 return;
 585         }
 586
 587         bm_get_info( gr_screen.current_bitmap, &bw, &bh );
 588
 589         opengl1_set_state( TEXTURE_SOURCE_NO_FILTERING, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
 590
 591         opengl_alloc_render_buffer(strlen(s) * 4);
 592
 593         x = sx;
 594         y = sy;
 595
 596         if (sx==0x8000) {                       //centered
 597                 x = get_centered_x(s);
 598         } else {
 599                 x = sx;
 600         }
 601
 602         spacing = 0;
 603         rb_offset = 0;
 604
 605         while (*s)      {
 606                 x += spacing;
 607
 608                 while (*s== '\n' )      {
 609                         s++;
 610                         y += Current_font->h;
 611                         if (sx==0x8000) {                       //centered
 612                                 x = get_centered_x(s);
 613                         } else {
 614                                 x = sx;
 615                         }
 616                 }
 617                 if (*s == 0 ) break;
 618
 619                 letter = get_char_width(s[0],s[1],&width,&spacing);
 620                 s++;
 621
 622                 //not in font, draw as space
 623                 if (letter<0)   {
 624                         continue;
 625                 }
 626
 627                 int xd, yd, xc, yc;
 628                 int wc, hc;
 629
 630                 // Check if this character is totally clipped
 631                 if ( x + width < gr_screen.clip_left ) continue;
 632                 if ( y + Current_font->h < gr_screen.clip_top ) continue;
 633                 if ( x > gr_screen.clip_right ) continue;
 634                 if ( y > gr_screen.clip_bottom ) continue;
 635
 636                 xd = yd = 0;
 637                 if ( x < gr_screen.clip_left ) xd = gr_screen.clip_left - x;
 638                 if ( y < gr_screen.clip_top ) yd = gr_screen.clip_top - y;
 639                 xc = x+xd;
 640                 yc = y+yd;
 641
 642                 wc = width - xd; hc = Current_font->h - yd;
 643                 if ( xc + wc > gr_screen.clip_right ) wc = gr_screen.clip_right - xc;
 644                 if ( yc + hc > gr_screen.clip_bottom ) hc = gr_screen.clip_bottom - yc;
 645
 646                 if ( wc < 1 ) continue;
 647                 if ( hc < 1 ) continue;
 648
 649                 int u = Current_font->bm_u[letter];
 650                 int v = Current_font->bm_v[letter];
 651
 652                 x1 = i2fl(xc + gr_screen.offset_x);
 653                 y1 = i2fl(yc + gr_screen.offset_y);
 654                 x2 = i2fl(x1 + wc);
 655                 y2 = i2fl(y1 + hc);
 656
 657                 u0 = u_scale * (i2fl(u+xd) / bw);
 658                 v0 = v_scale * (i2fl(v+yd) / bh);
 659
 660                 u1 = u_scale * (i2fl((u+xd)+wc) / bw);
 661                 v1 = v_scale * (i2fl((v+yd)+hc) / bh);
 662
 663                 render_buffer[rb_offset].x = x1;
 664                 render_buffer[rb_offset].y = y2;
 665                 render_buffer[rb_offset].u = u0;
 666                 render_buffer[rb_offset].v = v1;
 667                 ++rb_offset;
 668
 669                 render_buffer[rb_offset].x = x2;
 670                 render_buffer[rb_offset].y = y2;
 671                 render_buffer[rb_offset].u = u1;
 672                 render_buffer[rb_offset].v = v1;
 673                 ++rb_offset;
 674
 675                 render_buffer[rb_offset].x = x2;
 676                 render_buffer[rb_offset].y = y1;
 677                 render_buffer[rb_offset].u = u1;
 678                 render_buffer[rb_offset].v = v0;
 679                 ++rb_offset;
 680
 681                 render_buffer[rb_offset].x = x1;
 682                 render_buffer[rb_offset].y = y1;
 683                 render_buffer[rb_offset].u = u0;
 684                 render_buffer[rb_offset].v = v0;
 685                 ++rb_offset;
 686         }
 687
 688         glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
 689                         gr_screen.current_color.blue,gr_screen.current_color.alpha);
 690
 691         glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 692         glEnableClientState(GL_VERTEX_ARRAY);
 693
 694         glTexCoordPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].u);
 695         glVertexPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 696
 697         glDrawArrays(GL_QUADS, 0, rb_offset);
 698
 699         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 700         glDisableClientState(GL_VERTEX_ARRAY);
 701 }
 702
 703 void gr_opengl1_line(int x1,int y1,int x2,int y2)
 704 {
 705         opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
 706
 707         INT_CLIPLINE(x1,y1,x2,y2,gr_screen.clip_left,gr_screen.clip_top,
 708                         gr_screen.clip_right,gr_screen.clip_bottom,return,void(),void());
 709
 710         float sx1, sy1;
 711         float sx2, sy2;
 712
 713         sx1 = i2fl(x1 + gr_screen.offset_x)+0.5;
 714         sy1 = i2fl(y1 + gr_screen.offset_y)+0.5;
 715         sx2 = i2fl(x2 + gr_screen.offset_x)+0.5;
 716         sy2 = i2fl(y2 + gr_screen.offset_y)+0.5;
 717
 718         opengl_alloc_render_buffer(2);
 719
 720         if ( x1 == x2 && y1 == y2 ) {
 721                 render_buffer[0].x = sx1;
 722                 render_buffer[0].y = sy1;
 723                 render_buffer[0].z = -0.99f;
 724
 725                 glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
 726                                 gr_screen.current_color.blue, gr_screen.current_color.alpha);
 727
 728                 glEnableClientState(GL_VERTEX_ARRAY);
 729                 glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 730
 731                 glDrawArrays(GL_POINTS, 0, 1);
 732
 733                 glDisableClientState(GL_VERTEX_ARRAY);
 734
 735                 return;
 736         }
 737
 738         if ( x1 == x2 ) {
 739                 if ( sy1 < sy2 )    {
 740                         sy2 += 0.5f;
 741                 } else {
 742                         sy1 += 0.5f;
 743                 }
 744         } else if ( y1 == y2 )  {
 745                 if ( sx1 < sx2 )    {
 746                         sx2 += 0.5f;
 747                 } else {
 748                         sx1 += 0.5f;
 749                 }
 750         }
 751
 752         render_buffer[0].x = sx2;
 753         render_buffer[0].y = sy2;
 754         render_buffer[0].z = -0.99f;
 755
 756         render_buffer[1].x = sx1;
 757         render_buffer[1].y = sy1;
 758         render_buffer[1].z = -0.99f;
 759
 760         glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
 761                         gr_screen.current_color.blue, gr_screen.current_color.alpha);
 762
 763         glEnableClientState(GL_VERTEX_ARRAY);
 764         glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 765
 766         glDrawArrays(GL_LINES, 0, 2);
 767
 768         glDisableClientState(GL_VERTEX_ARRAY);
 769 }
 770
 771 void gr_opengl1_aaline(vertex *v1, vertex *v2)
 772 {
 773         gr_opengl1_line( fl2i(v1->sx), fl2i(v1->sy), fl2i(v2->sx), fl2i(v2->sy) );
 774 }
 775
 776 void gr_opengl1_gradient(int x1,int y1,int x2,int y2)
 777 {
 778         int swapped=0;
 779
 780         if ( !gr_screen.current_color.is_alphacolor )   {
 781                 gr_line( x1, y1, x2, y2 );
 782                 return;
 783         }
 784
 785         INT_CLIPLINE(x1,y1,x2,y2,gr_screen.clip_left,gr_screen.clip_top,
 786                         gr_screen.clip_right,gr_screen.clip_bottom,return,void(),swapped=1);
 787
 788         opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
 789
 790         int aa = swapped ? 0 : gr_screen.current_color.alpha;
 791         int ba = swapped ? gr_screen.current_color.alpha : 0;
 792
 793         float sx1, sy1;
 794         float sx2, sy2;
 795
 796         sx1 = i2fl(x1 + gr_screen.offset_x)+0.5;
 797         sy1 = i2fl(y1 + gr_screen.offset_y)+0.5;
 798         sx2 = i2fl(x2 + gr_screen.offset_x)+0.5;
 799         sy2 = i2fl(y2 + gr_screen.offset_y)+0.5;
 800
 801         if ( x1 == x2 ) {
 802                 if ( sy1 < sy2 )    {
 803                         sy2 += 0.5f;
 804                 } else {
 805                         sy1 += 0.5f;
 806                 }
 807         } else if ( y1 == y2 )  {
 808                 if ( sx1 < sx2 )    {
 809                         sx2 += 0.5f;
 810                 } else {
 811                         sx1 += 0.5f;
 812                 }
 813         }
 814
 815         opengl_alloc_render_buffer(2);
 816
 817         render_buffer[0].r = gr_screen.current_color.red;
 818         render_buffer[0].g = gr_screen.current_color.green;
 819         render_buffer[0].b = gr_screen.current_color.blue;
 820         render_buffer[0].a = ba;
 821         render_buffer[0].x = sx2;
 822         render_buffer[0].y = sy2;
 823         render_buffer[0].z = -0.99f;
 824
 825         render_buffer[1].r = gr_screen.current_color.red;
 826         render_buffer[1].g = gr_screen.current_color.green;
 827         render_buffer[1].b = gr_screen.current_color.blue;
 828         render_buffer[1].a = aa;
 829         render_buffer[1].x = sx1;
 830         render_buffer[1].y = sy1;
 831         render_buffer[1].z = -0.99f;
 832
 833         glEnableClientState(GL_COLOR_ARRAY);
 834         glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(rb_t), &render_buffer[0].r);
 835
 836         glEnableClientState(GL_VERTEX_ARRAY);
 837         glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 838
 839         glDrawArrays(GL_LINES, 0, 2);
 840
 841         glDisableClientState(GL_COLOR_ARRAY);
 842         glDisableClientState(GL_VERTEX_ARRAY);
 843 }
 844
 845 void gr_opengl1_circle( int xc, int yc, int d )
 846 {
 847         int p,x, y, r;
 848
 849         r = d/2;
 850         p=3-d;
 851         x=0;
 852         y=r;
 853
 854         // Big clip
 855         if ( (xc+r) < gr_screen.clip_left ) return;
 856         if ( (xc-r) > gr_screen.clip_right ) return;
 857         if ( (yc+r) < gr_screen.clip_top ) return;
 858         if ( (yc-r) > gr_screen.clip_bottom ) return;
 859
 860         while(x<y)      {
 861                 // Draw the first octant
 862                 gr_opengl1_line( xc-y, yc-x, xc+y, yc-x );
 863                 gr_opengl1_line( xc-y, yc+x, xc+y, yc+x );
 864
 865                 if (p<0)
 866                         p=p+(x<<2)+6;
 867                 else    {
 868                         // Draw the second octant
 869                         gr_opengl1_line( xc-x, yc-y, xc+x, yc-y );
 870                         gr_opengl1_line( xc-x, yc+y, xc+x, yc+y );
 871
 872                         p=p+((x-y)<<2)+10;
 873                         y--;
 874                 }
 875                 x++;
 876         }
 877         if(x==y) {
 878                 gr_opengl1_line( xc-x, yc-y, xc+x, yc-y );
 879                 gr_opengl1_line( xc-x, yc+y, xc+x, yc+y );
 880         }
 881         return;
 882 }
 883
 884 void gr_opengl1_pixel(int x, int y)
 885 {
 886         gr_line(x,y,x,y);
 887 }
 888
 889
 890 // cross fade
 891 void gr_opengl1_cross_fade(int bmap1, int bmap2, int x1, int y1, int x2, int y2, float pct)
 892 {
 893         gr_set_bitmap(bmap1, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, 1.0f - pct );
 894         gr_bitmap(x1, y1);
 895
 896         gr_set_bitmap(bmap2, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, pct );
 897         gr_bitmap(x2, y2);
 898 }
 899
 900 void gr_opengl1_flash(int r, int g, int b)
 901 {
 902         CAP(r,0,255);
 903         CAP(g,0,255);
 904         CAP(b,0,255);
 905
 906         if ( r || g || b ) {
 907                 opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_ALPHA_ADDITIVE, ZBUFFER_TYPE_NONE );
 908
 909                 float x1, x2, y1, y2;
 910                 x1 = i2fl(gr_screen.clip_left+gr_screen.offset_x);
 911                 y1 = i2fl(gr_screen.clip_top+gr_screen.offset_y);
 912                 x2 = i2fl(gr_screen.clip_right+gr_screen.offset_x);
 913                 y2 = i2fl(gr_screen.clip_bottom+gr_screen.offset_y);
 914
 915                 glColor4ub(r, g, b, 255);
 916
 917                 opengl_alloc_render_buffer(4);
 918
 919                 render_buffer[0].x = x1;
 920                 render_buffer[0].y = y2;
 921                 render_buffer[0].z = -0.99f;
 922
 923                 render_buffer[1].x = x2;
 924                 render_buffer[1].y = y2;
 925                 render_buffer[1].z = -0.99f;
 926
 927                 render_buffer[2].x = x2;
 928                 render_buffer[2].y = y1;
 929                 render_buffer[2].z = -0.99f;
 930
 931                 render_buffer[3].x = x1;
 932                 render_buffer[3].y = y1;
 933                 render_buffer[3].z = -0.99f;
 934
 935                 glEnableClientState(GL_VERTEX_ARRAY);
 936                 glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
 937
 938                 glDrawArrays(GL_QUADS, 0, 4);
 939
 940                 glDisableClientState(GL_VERTEX_ARRAY);
 941         }
 942 }
 943
 944 void gr_opengl1_tmapper( int nverts, vertex **verts, uint flags )
 945 {
 946         opengl1_tmapper_internal( nverts, verts, flags, 0 );
 947 }
 948
 949 #define FIND_SCALED_NUM(x,x0,x1,y0,y1) (((((x)-(x0))*((y1)-(y0)))/((x1)-(x0)))+(y0))
 950
 951 void gr_opengl1_scaler(vertex *va, vertex *vb )
 952 {
 953         float x0, y0, x1, y1;
 954         float u0, v0, u1, v1;
 955         float clipped_x0, clipped_y0, clipped_x1, clipped_y1;
 956         float clipped_u0, clipped_v0, clipped_u1, clipped_v1;
 957         float xmin, xmax, ymin, ymax;
 958         int dx0, dy0, dx1, dy1;
 959
 960         //============= CLIP IT =====================
 961
 962         x0 = va->sx; y0 = va->sy;
 963         x1 = vb->sx; y1 = vb->sy;
 964
 965         xmin = i2fl(gr_screen.clip_left); ymin = i2fl(gr_screen.clip_top);
 966         xmax = i2fl(gr_screen.clip_right); ymax = i2fl(gr_screen.clip_bottom);
 967
 968         u0 = va->u; v0 = va->v;
 969         u1 = vb->u; v1 = vb->v;
 970
 971         // Check for obviously offscreen bitmaps...
 972         if ( (y1<=y0) || (x1<=x0) ) return;
 973         if ( (x1<xmin ) || (x0>xmax) ) return;
 974         if ( (y1<ymin ) || (y0>ymax) ) return;
 975
 976         clipped_u0 = u0; clipped_v0 = v0;
 977         clipped_u1 = u1; clipped_v1 = v1;
 978
 979         clipped_x0 = x0; clipped_y0 = y0;
 980         clipped_x1 = x1; clipped_y1 = y1;
 981
 982         // Clip the left, moving u0 right as necessary
 983         if ( x0 < xmin )        {
 984                 clipped_u0 = FIND_SCALED_NUM(xmin,x0,x1,u0,u1);
 985                 clipped_x0 = xmin;
 986         }
 987
 988         // Clip the right, moving u1 left as necessary
 989         if ( x1 > xmax )        {
 990                 clipped_u1 = FIND_SCALED_NUM(xmax,x0,x1,u0,u1);
 991                 clipped_x1 = xmax;
 992         }
 993
 994         // Clip the top, moving v0 down as necessary
 995         if ( y0 < ymin )        {
 996                 clipped_v0 = FIND_SCALED_NUM(ymin,y0,y1,v0,v1);
 997                 clipped_y0 = ymin;
 998         }
 999
1000         // Clip the bottom, moving v1 up as necessary
1001         if ( y1 > ymax )        {
1002                 clipped_v1 = FIND_SCALED_NUM(ymax,y0,y1,v0,v1);
1003                 clipped_y1 = ymax;
1004         }
1005
1006         dx0 = fl2i(clipped_x0); dx1 = fl2i(clipped_x1);
1007         dy0 = fl2i(clipped_y0); dy1 = fl2i(clipped_y1);
1008
1009         if (dx1<=dx0) return;
1010         if (dy1<=dy0) return;
1011
1012         //============= DRAW IT =====================
1013
1014         vertex v[4];
1015         vertex *vl[4];
1016
1017         vl[0] = &v[0];
1018         v[0].sx = clipped_x0;
1019         v[0].sy = clipped_y0;
1020         v[0].sw = va->sw;
1021         v[0].z = va->z;
1022         v[0].u = clipped_u0;
1023         v[0].v = clipped_v0;
1024
1025         vl[1] = &v[1];
1026         v[1].sx = clipped_x1;
1027         v[1].sy = clipped_y0;
1028         v[1].sw = va->sw;
1029         v[1].z = va->z;
1030         v[1].u = clipped_u1;
1031         v[1].v = clipped_v0;
1032
1033         vl[2] = &v[2];
1034         v[2].sx = clipped_x1;
1035         v[2].sy = clipped_y1;
1036         v[2].sw = va->sw;
1037         v[2].z = va->z;
1038         v[2].u = clipped_u1;
1039         v[2].v = clipped_v1;
1040
1041         vl[3] = &v[3];
1042         v[3].sx = clipped_x0;
1043         v[3].sy = clipped_y1;
1044         v[3].sw = va->sw;
1045         v[3].z = va->z;
1046         v[3].u = clipped_u0;
1047         v[3].v = clipped_v1;
1048
1049         opengl1_tmapper_internal( 4, vl, TMAP_FLAG_TEXTURED, 1 );
1050 }