src/graphics/grgl1.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 "SDL_opengl.h"
  10
  11 #include "gropengl.h"
  12 #include "gropenglinternal.h"
  13 #include "grgl1.h"
  14 #include "2d.h"
  15 #include "mouse.h"
  16 #include "pstypes.h"
  17 #include "cfile.h"
  18 #include "bmpman.h"
  19 #include "grinternal.h"
  20 #include "osapi.h"
  21 #include "osregistry.h"
  22
  23
  24 int GL_one_inited = 0;
  25
  26
  27 static GLuint GL_stream_tex = 0;
  28 static GLuint Gr_saved_screen_tex = 0;
  29
  30 static int Gr_opengl_mouse_saved = 0;
  31 static int Gr_opengl_mouse_saved_x = 0;
  32 static int Gr_opengl_mouse_saved_y = 0;
  33 static int Gr_opengl_mouse_saved_w = 0;
  34 static int Gr_opengl_mouse_saved_h = 0;
  35 static ubyte *Gr_opengl_mouse_saved_data = NULL;
  36
  37
  38 PFNGLSECONDARYCOLORPOINTERPROC vglSecondaryColorPointer = NULL;
  39
  40
  41 static gr_alpha_blend GL_current_alpha_blend = (gr_alpha_blend) -1;
  42 static gr_zbuffer_type GL_current_zbuffer_type = (gr_zbuffer_type) -1;
  43
  44 void opengl1_set_state(gr_texture_source ts, gr_alpha_blend ab, gr_zbuffer_type zt)
  45 {
  46         opengl1_set_texture_state(ts);
  47
  48         if (ab != GL_current_alpha_blend) {
  49                 switch (ab) {
  50                         case ALPHA_BLEND_NONE:                  // 1*SrcPixel + 0*DestPixel
  51                                 glBlendFunc(GL_ONE, GL_ZERO);
  52                                 break;
  53                         case ALPHA_BLEND_ADDITIVE:              // 1*SrcPixel + 1*DestPixel
  54                                 glBlendFunc(GL_ONE, GL_ONE);
  55                                 break;
  56                         case ALPHA_BLEND_ALPHA_ADDITIVE:        // Alpha*SrcPixel + 1*DestPixel
  57                                 glBlendFunc(GL_SRC_ALPHA, GL_ONE);
  58                                 break;
  59                         case ALPHA_BLEND_ALPHA_BLEND_ALPHA:     // Alpha*SrcPixel + (1-Alpha)*DestPixel
  60                                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  61                                 break;
  62                         case ALPHA_BLEND_ALPHA_BLEND_SRC_COLOR: // Alpha*SrcPixel + (1-SrcPixel)*DestPixel
  63                                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_COLOR);
  64                                 break;
  65                         default:
  66                                 break;
  67                 }
  68
  69                 GL_current_alpha_blend = ab;
  70         }
  71
  72         if (zt != GL_current_zbuffer_type) {
  73                 switch (zt) {
  74                         case ZBUFFER_TYPE_NONE:
  75                                 glDepthFunc(GL_ALWAYS);
  76                                 glDepthMask(GL_FALSE);
  77                                 break;
  78                         case ZBUFFER_TYPE_READ:
  79                                 glDepthFunc(GL_LESS);
  80                                 glDepthMask(GL_FALSE);
  81                                 break;
  82                         case ZBUFFER_TYPE_WRITE:
  83                                 glDepthFunc(GL_ALWAYS);
  84                                 glDepthMask(GL_TRUE);
  85                                 break;
  86                         case ZBUFFER_TYPE_FULL:
  87                                 glDepthFunc(GL_LESS);
  88                                 glDepthMask(GL_TRUE);
  89                                 break;
  90                         default:
  91                                 break;
  92                 }
  93
  94                 GL_current_zbuffer_type = zt;
  95         }
  96 }
  97
  98 void opengl1_cleanup()
  99 {
 100         if ( !GL_one_inited ) {
 101                 return;
 102         }
 103
 104         gr_opengl_reset_clip();
 105         gr_opengl_clear();
 106         gr_opengl1_flip();
 107
 108         gr_opengl1_free_screen(0);
 109
 110         if (Gr_opengl_mouse_saved_data) {
 111                 free(Gr_opengl_mouse_saved_data);
 112                 Gr_opengl_mouse_saved_data = NULL;
 113         }
 114
 115         opengl1_tcache_cleanup();
 116
 117         if (GL_context) {
 118                 SDL_GL_DeleteContext(GL_context);
 119                 GL_context = NULL;
 120         }
 121
 122         GL_one_inited = 0;
 123 }
 124
 125 static void opengl1_init_func_pointers()
 126 {
 127         gr_screen.gf_flip = gr_opengl1_flip;
 128         gr_screen.gf_set_clip = gr_opengl1_set_clip;
 129         gr_screen.gf_reset_clip = gr_opengl_reset_clip;
 130
 131         gr_screen.gf_clear = gr_opengl_clear;
 132
 133         gr_screen.gf_aabitmap = gr_opengl1_aabitmap;
 134         gr_screen.gf_aabitmap_ex = gr_opengl1_aabitmap_ex;
 135
 136         gr_screen.gf_rect = gr_opengl1_rect;
 137         gr_screen.gf_shade = gr_opengl1_shade;
 138         gr_screen.gf_string = gr_opengl1_string;
 139         gr_screen.gf_circle = gr_opengl1_circle;
 140
 141         gr_screen.gf_line = gr_opengl1_line;
 142         gr_screen.gf_aaline = gr_opengl1_aaline;
 143         gr_screen.gf_pixel = gr_opengl1_pixel;
 144         gr_screen.gf_scaler = gr_opengl1_scaler;
 145         gr_screen.gf_tmapper = gr_opengl1_tmapper;
 146
 147         gr_screen.gf_gradient = gr_opengl1_gradient;
 148
 149         gr_screen.gf_print_screen = gr_opengl_print_screen;
 150
 151         gr_screen.gf_fade_in = gr_opengl1_fade_in;
 152         gr_screen.gf_fade_out = gr_opengl1_fade_out;
 153         gr_screen.gf_flash = gr_opengl1_flash;
 154
 155         gr_screen.gf_zbuffer_clear = gr_opengl1_zbuffer_clear;
 156
 157         gr_screen.gf_save_screen = gr_opengl1_save_screen;
 158         gr_screen.gf_restore_screen = gr_opengl1_restore_screen;
 159         gr_screen.gf_free_screen = gr_opengl1_free_screen;
 160
 161         gr_screen.gf_dump_frame_start = gr_opengl1_dump_frame_start;
 162         gr_screen.gf_dump_frame_stop = gr_opengl1_dump_frame_stop;
 163         gr_screen.gf_dump_frame = gr_opengl1_dump_frame;
 164
 165         gr_screen.gf_stream_start = gr_opengl1_stream_start;
 166         gr_screen.gf_stream_frame = gr_opengl1_stream_frame;
 167         gr_screen.gf_stream_stop = gr_opengl1_stream_stop;
 168
 169         gr_screen.gf_set_gamma = gr_opengl1_set_gamma;
 170
 171         gr_screen.gf_lock = gr_opengl_lock;
 172         gr_screen.gf_unlock = gr_opengl_unlock;
 173
 174         gr_screen.gf_fog_set = gr_opengl1_fog_set;
 175
 176         gr_screen.gf_get_region = gr_opengl1_get_region;
 177
 178         gr_screen.gf_set_cull = gr_opengl_set_cull;
 179
 180         gr_screen.gf_cross_fade = gr_opengl1_cross_fade;
 181
 182         gr_screen.gf_preload_init = gr_opengl1_preload_init;
 183         gr_screen.gf_preload = gr_opengl1_preload;
 184
 185         gr_screen.gf_zbias = gr_opengl_zbias;
 186
 187         gr_screen.gf_set_viewport = gr_opengl1_set_viewport;
 188
 189         gr_screen.gf_activate = gr_opengl_activate;
 190
 191         gr_screen.gf_release_texture = gr_opengl1_release_texture;
 192 }
 193
 194 int opengl1_init()
 195 {
 196         if (GL_one_inited) {
 197                 return 1;
 198         }
 199
 200         GL_one_inited = 1;
 201
 202         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, 0);
 203         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 1);
 204         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
 205
 206         GL_context = SDL_GL_CreateContext(GL_window);
 207
 208         if ( !GL_context ) {
 209                 opengl1_cleanup();
 210                 return 0;
 211         }
 212
 213         mprintf(("  Vendor   : %s\n", glGetString(GL_VENDOR)));
 214         mprintf(("  Renderer : %s\n", glGetString(GL_RENDERER)));
 215         mprintf(("  Version  : %s\n", glGetString(GL_VERSION)));
 216
 217         // set up generic variables
 218         opengl_set_variables();
 219
 220         opengl1_init_func_pointers();
 221         opengl1_tcache_init();
 222
 223         // initial viewport setup
 224         gr_opengl1_set_viewport(gr_screen.max_w, gr_screen.max_h);
 225
 226         glShadeModel(GL_SMOOTH);
 227         glEnable(GL_DITHER);
 228         glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
 229         glHint(GL_FOG_HINT, GL_NICEST);
 230
 231         glEnable(GL_DEPTH_TEST);
 232         glEnable(GL_BLEND);
 233
 234         glEnable(GL_TEXTURE_2D);
 235
 236         glDepthRange(0.0, 1.0);
 237
 238         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 239         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 240
 241         glFlush();
 242
 243         gr_opengl_clear();
 244         gr_opengl_set_cull(1);
 245
 246         return 1;
 247 }
 248
 249 void gr_opengl1_flip()
 250 {
 251         if ( !GL_one_inited ) {
 252                 return;
 253         }
 254
 255         gr_reset_clip();
 256
 257         mouse_eval_deltas();
 258
 259         Gr_opengl_mouse_saved = 0;
 260
 261         if ( mouse_is_visible() )       {
 262                 int mx, my;
 263
 264                 mouse_get_pos( &mx, &my );
 265
 266                 gr_opengl1_save_mouse_area(mx,my,32,32);
 267
 268                 if (Gr_cursor == -1) {
 269 #ifndef NDEBUG
 270                         gr_set_color(255,255,255);
 271                         gr_line(mx, my, mx+7, my + 7);
 272                         gr_line(mx, my, mx+5, my );
 273                         gr_line(mx, my, mx, my+5);
 274 #endif
 275                 } else {
 276                         gr_set_bitmap(Gr_cursor);
 277                         gr_bitmap(mx, my);
 278                 }
 279          }
 280
 281 #ifndef NDEBUG
 282         GLenum error = GL_NO_ERROR;
 283
 284         do {
 285                 error = glGetError();
 286
 287                 if (error != GL_NO_ERROR) {
 288                         nprintf(("Warning", "!!DEBUG!! OpenGL Error: %d\n", error));
 289                 }
 290         } while (error != GL_NO_ERROR);
 291 #endif
 292
 293         SDL_GL_SwapWindow(GL_window);
 294
 295         opengl1_tcache_frame();
 296
 297         int cnt = GL_activate;
 298         if ( cnt )      {
 299                 GL_activate-=cnt;
 300                 opengl1_tcache_flush();
 301                 // gr_opengl_clip_cursor(1); /* mouse grab, see opengl_activate */
 302         }
 303
 304         cnt = GL_deactivate;
 305         if ( cnt )      {
 306                 GL_deactivate-=cnt;
 307                 // gr_opengl_clip_cursor(0);  /* mouse grab, see opengl_activate */
 308         }
 309 }
 310
 311 void gr_opengl1_set_clip(int x, int y, int w, int h)
 312 {
 313         // check for sanity of parameters
 314         CAP(x, 0, gr_screen.max_w - 1);
 315         CAP(y, 0, gr_screen.max_h - 1);
 316         CAP(w, 0, gr_screen.max_w - x);
 317         CAP(h, 0, gr_screen.max_h - y);
 318
 319         gr_screen.offset_x = x;
 320         gr_screen.offset_y = y;
 321         gr_screen.clip_left = 0;
 322         gr_screen.clip_right = w-1;
 323         gr_screen.clip_top = 0;
 324         gr_screen.clip_bottom = h-1;
 325         gr_screen.clip_width = w;
 326         gr_screen.clip_height = h;
 327
 328         x = fl2i((x * GL_viewport_scale_w) + 0.5f) + GL_viewport_x;
 329         y = fl2i((y * GL_viewport_scale_h) + 0.5f) + GL_viewport_y;
 330         w = fl2i((w * GL_viewport_scale_w) + 0.5f);
 331         h = fl2i((h * GL_viewport_scale_h) + 0.5f);
 332
 333         glEnable(GL_SCISSOR_TEST);
 334         glScissor(x, GL_viewport_h-y-h, w, h);
 335 }
 336
 337 void gr_opengl1_fog_set(int fog_mode, int r, int g, int b, float fog_near, float fog_far)
 338 {
 339         SDL_assert((r >= 0) && (r < 256));
 340         SDL_assert((g >= 0) && (g < 256));
 341         SDL_assert((b >= 0) && (b < 256));
 342
 343         if (fog_mode == GR_FOGMODE_NONE) {
 344                 if (gr_screen.current_fog_mode != fog_mode) {
 345                         glDisable(GL_FOG);
 346                 }
 347
 348                 gr_screen.current_fog_mode = fog_mode;
 349
 350                 return;
 351         }
 352
 353         if (gr_screen.current_fog_mode != fog_mode) {
 354                 glEnable(GL_FOG);
 355                 glFogi(GL_FOG_MODE, GL_LINEAR);
 356
 357                 gr_screen.current_fog_mode = fog_mode;
 358         }
 359
 360         if ( (gr_screen.current_fog_color.red != r) ||
 361                         (gr_screen.current_fog_color.green != g) ||
 362                         (gr_screen.current_fog_color.blue != b) ) {
 363                 gr_init_color( &gr_screen.current_fog_color, r, g, b );
 364
 365                 GLfloat fc[4];
 366
 367                 fc[0] = r / 255.0f;
 368                 fc[1] = g / 255.0f;
 369                 fc[2] = b / 255.0f;
 370                 fc[3] = 1.0f;
 371
 372                 glFogfv(GL_FOG_COLOR, fc);
 373         }
 374
 375         if( (fog_near >= 0.0f) && (fog_far >= 0.0f) &&
 376                         ((fog_near != gr_screen.fog_near) ||
 377                         (fog_far != gr_screen.fog_far)) ) {
 378                 gr_screen.fog_near = fog_near;
 379                 gr_screen.fog_far = fog_far;
 380
 381                 glFogf(GL_FOG_START, fog_near);
 382                 glFogf(GL_FOG_END, fog_far);
 383         }
 384 }
 385
 386 void gr_opengl1_zbuffer_clear(int mode)
 387 {
 388         if (mode) {
 389                 Gr_zbuffering = 1;
 390                 Gr_zbuffering_mode = GR_ZBUFF_FULL;
 391                 Gr_global_zbuffering = 1;
 392
 393                 opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_NONE, ZBUFFER_TYPE_FULL );
 394                 glClear ( GL_DEPTH_BUFFER_BIT );
 395         } else {
 396                 Gr_zbuffering = 0;
 397                 Gr_zbuffering_mode = GR_ZBUFF_NONE;
 398                 Gr_global_zbuffering = 0;
 399         }
 400 }
 401
 402 void gr_opengl1_fade_in(int instantaneous)
 403 {
 404         // Empty - DDOI
 405 }
 406
 407 void gr_opengl1_fade_out(int instantaneous)
 408 {
 409         // Empty - DDOI
 410 }
 411
 412 void gr_opengl1_get_region(int front, int w, int h, ubyte *data)
 413 {
 414         if (front) {
 415                 glReadBuffer(GL_FRONT);
 416         } else {
 417                 glReadBuffer(GL_BACK);
 418         }
 419
 420         opengl1_set_state(TEXTURE_SOURCE_NO_FILTERING, ALPHA_BLEND_NONE, ZBUFFER_TYPE_NONE);
 421
 422         glPixelStorei(GL_UNPACK_ROW_LENGTH, GL_viewport_w);
 423
 424         int x = GL_viewport_x;
 425         int y = (GL_viewport_y+GL_viewport_h)-h-1;
 426
 427         GLenum pxtype = GL_UNSIGNED_SHORT_5_5_5_1;
 428
 429         if (gr_screen.bytes_per_pixel == 4) {
 430                 pxtype = GL_UNSIGNED_BYTE;
 431         }
 432
 433         glReadPixels(x, y, w, h, GL_RGBA, pxtype, data);
 434
 435         glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 436 }
 437
 438 void gr_opengl1_save_mouse_area(int x, int y, int w, int h)
 439 {
 440         int x1, y1, x2, y2;
 441
 442         if (Gr_saved_screen_tex) {
 443                 // already saved, don't need it again
 444                 return;
 445         }
 446
 447         w = fl2i((w * GL_viewport_scale_w) + 0.5f);
 448         h = fl2i((h * GL_viewport_scale_h) + 0.5f);
 449
 450         x1 = x;
 451         y1 = y;
 452         x2 = x+w-1;
 453         y2 = y+h-1;
 454
 455         CAP(x1, 0, GL_viewport_w);
 456         CAP(x2, 0, GL_viewport_w);
 457         CAP(y1, 0, GL_viewport_h);
 458         CAP(y2, 0, GL_viewport_h);
 459
 460         Gr_opengl_mouse_saved_x = x1;
 461         Gr_opengl_mouse_saved_y = y1;
 462         Gr_opengl_mouse_saved_w = x2 - x1 + 1;
 463         Gr_opengl_mouse_saved_h = y2 - y1 + 1;
 464
 465         if ( (Gr_opengl_mouse_saved_w < 1) || (Gr_opengl_mouse_saved_h < 1) ) {
 466                 return;
 467         }
 468
 469         if (Gr_opengl_mouse_saved_data == NULL) {
 470                 Gr_opengl_mouse_saved_data = (ubyte*)malloc(w * h * 3);
 471
 472                 if ( !Gr_opengl_mouse_saved_data ) {
 473                         return;
 474                 }
 475         }
 476
 477         x1 = GL_viewport_x+Gr_opengl_mouse_saved_x;
 478         y1 = (GL_viewport_y+GL_viewport_h)-Gr_opengl_mouse_saved_y-Gr_opengl_mouse_saved_h;
 479
 480         glReadBuffer(GL_BACK);
 481
 482         glReadPixels(x1, y1, Gr_opengl_mouse_saved_w, Gr_opengl_mouse_saved_h,
 483                         GL_RGB, GL_UNSIGNED_BYTE, Gr_opengl_mouse_saved_data);
 484
 485         Gr_opengl_mouse_saved = 1;
 486 }
 487
 488 int gr_opengl1_save_screen()
 489 {
 490         gr_reset_clip();
 491
 492         if (Gr_saved_screen_tex) {
 493                 mprintf(( "Screen already saved!\n" ));
 494                 return -1;
 495         }
 496
 497         glGenTextures(1, &Gr_saved_screen_tex);
 498
 499         if ( !Gr_saved_screen_tex ) {
 500                 mprintf(( "Couldn't create texture for saved screen!\n" ));
 501                 return -1;
 502         }
 503
 504         glBindTexture(GL_TEXTURE_2D, Gr_saved_screen_tex);
 505
 506         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 507         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 508         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
 509         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 510         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 511
 512         glReadBuffer(GL_FRONT);
 513
 514         glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, GL_viewport_x, GL_viewport_y,
 515                         GL_viewport_w, GL_viewport_h, 0);
 516
 517         if (Gr_opengl_mouse_saved) {
 518                 int x = Gr_opengl_mouse_saved_x;
 519                 int y = GL_viewport_h-Gr_opengl_mouse_saved_y-Gr_opengl_mouse_saved_h;
 520
 521                 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, Gr_opengl_mouse_saved_w,
 522                                 Gr_opengl_mouse_saved_h, GL_RGB, GL_UNSIGNED_BYTE,
 523                                 Gr_opengl_mouse_saved_data);
 524         }
 525
 526         glBindTexture(GL_TEXTURE_2D, 0);
 527
 528         return 0;
 529 }
 530
 531 void gr_opengl1_restore_screen(int)
 532 {
 533         gr_reset_clip();
 534
 535         if ( !Gr_saved_screen_tex ) {
 536                 gr_clear();
 537                 return;
 538         }
 539
 540         int x = 0;
 541         int y = 0;
 542         int w = fl2i(GL_viewport_w / GL_viewport_scale_w + 0.5f);
 543         int h = fl2i(GL_viewport_h / GL_viewport_scale_h + 0.5f);
 544
 545         const int tex_coord[] = { 0, 1, 0, 0, 1, 1, 1, 0 };     // y-flipped
 546         const int ver_coord[] = { x, y, x, h, w, y, w, h };
 547
 548         glColor4ub(255, 255, 255, 255);
 549
 550         glBindTexture(GL_TEXTURE_2D, Gr_saved_screen_tex);
 551
 552         opengl1_set_state(TEXTURE_SOURCE_NO_FILTERING, ALPHA_BLEND_NONE, ZBUFFER_TYPE_NONE);
 553
 554         glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 555         glEnableClientState(GL_VERTEX_ARRAY);
 556
 557         glTexCoordPointer(2, GL_INT, 0, &tex_coord);
 558         glVertexPointer(2, GL_INT, 0, &ver_coord);
 559
 560         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 561
 562         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 563         glDisableClientState(GL_VERTEX_ARRAY);
 564
 565         glBindTexture(GL_TEXTURE_2D, 0);
 566 }
 567
 568 void gr_opengl1_free_screen(int)
 569 {
 570         if (Gr_saved_screen_tex) {
 571                 glDeleteTextures(1, &Gr_saved_screen_tex);
 572                 Gr_saved_screen_tex = 0;
 573         }
 574 }
 575
 576 void gr_opengl1_dump_frame_start(int first_frame, int frames_between_dumps)
 577 {
 578         STUB_FUNCTION;
 579 }
 580
 581 void gr_opengl1_dump_frame_stop()
 582 {
 583         STUB_FUNCTION;
 584 }
 585
 586 void gr_opengl1_dump_frame()
 587 {
 588         STUB_FUNCTION;
 589 }
 590
 591 static int GL_stream_w = 0;
 592 static int GL_stream_h = 0;
 593 static bool GL_stream_scale = false;
 594 static float GL_stream_scale_by = 1.0f;
 595
 596 static rb_t GL_stream[4];
 597
 598 void gr_opengl1_stream_start(int x, int y, int w, int h)
 599 {
 600         if (GL_stream_tex) {
 601                 return;
 602         }
 603
 604         if (gr_screen.use_sections) {
 605                 mprintf(("GR_STREAM: Bitmap sections not supported\n"));
 606                 return;
 607         }
 608
 609         int tex_w = next_pow2(w);
 610         int tex_h = next_pow2(h);
 611
 612         glGenTextures(1, &GL_stream_tex);
 613
 614         glBindTexture(GL_TEXTURE_2D, GL_stream_tex);
 615
 616         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 617         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 618         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 619         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 620
 621         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_w, tex_h, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, NULL);
 622
 623         glBindTexture(GL_TEXTURE_2D, 0);
 624
 625         uint scale = os_config_read_uint("Video", "ScaleMovies", 1);
 626
 627         if (scale) {
 628                 GL_stream_scale = true;
 629
 630                 GL_stream_scale_by = GL_viewport_w / i2fl(w);
 631         } else {
 632                 GL_stream_scale = false;
 633         }
 634
 635         int sx, sy;
 636
 637         if (x < 0) {
 638                 sx = scale ? 0 : ((gr_screen.max_w - w) / 2);
 639         } else {
 640                 sx = x;
 641         }
 642
 643         if (y < 0) {
 644                 sy = scale ? ((480 - h) / 2) : ((gr_screen.max_h - h) / 2);
 645         } else {
 646                 sy = y;
 647         }
 648
 649         GL_stream_w = w;
 650         GL_stream_h = h;
 651
 652         GL_stream[0].x = i2fl(sx);
 653         GL_stream[0].y = i2fl(sy);
 654         GL_stream[0].u = 0.0f;
 655         GL_stream[0].v = 0.0f;
 656
 657         GL_stream[1].x = i2fl(sx);
 658         GL_stream[1].y = i2fl(sy + h);
 659         GL_stream[1].u = 0.0f;
 660         GL_stream[1].v = i2fl(h) / i2fl(tex_h);
 661
 662         GL_stream[2].x = i2fl(sx + w);
 663         GL_stream[2].y = i2fl(sy);
 664         GL_stream[2].u = i2fl(w) / i2fl(tex_w);
 665         GL_stream[2].v = 0.0f;
 666
 667         GL_stream[3].x = i2fl(sx + w);
 668         GL_stream[3].y = i2fl(sy + h);
 669         GL_stream[3].u = i2fl(w) / i2fl(tex_w);
 670         GL_stream[3].v = i2fl(h) / i2fl(tex_h);
 671
 672         glDisable(GL_DEPTH_TEST);
 673 }
 674
 675 void gr_opengl1_stream_frame(ubyte *frame)
 676 {
 677         if ( !GL_stream_tex ) {
 678                 return;
 679         }
 680
 681         glEnableClientState(GL_VERTEX_ARRAY);
 682         glVertexPointer(2, GL_FLOAT, sizeof(rb_t), &GL_stream[0].x);
 683
 684         glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 685         glTexCoordPointer(2, GL_FLOAT, sizeof(rb_t), &GL_stream[0].u);
 686
 687         glBindTexture(GL_TEXTURE_2D, GL_stream_tex);
 688
 689         glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, GL_stream_w, GL_stream_h, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, frame);
 690
 691         if (GL_stream_scale) {
 692                 glPushMatrix();
 693                 glLoadIdentity();
 694                 glScalef(GL_stream_scale_by, GL_stream_scale_by, 1.0f);
 695         }
 696
 697         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 698
 699         if (GL_stream_scale) {
 700                 glPopMatrix();
 701         }
 702
 703         glBindTexture(GL_TEXTURE_2D, 0);
 704
 705         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 706         glDisableClientState(GL_VERTEX_ARRAY);
 707 }
 708
 709 void gr_opengl1_stream_stop()
 710 {
 711         if (GL_stream_tex) {
 712                 glBindTexture(GL_TEXTURE_2D, 0);
 713                 glDeleteTextures(1, &GL_stream_tex);
 714                 GL_stream_tex = 0;
 715
 716                 glEnable(GL_DEPTH_TEST);
 717         }
 718 }
 719
 720 void gr_opengl1_set_viewport(int width, int height)
 721 {
 722         int w, h, x, y;
 723
 724         float ratio = gr_screen.max_w / i2fl(gr_screen.max_h);
 725
 726         w = width;
 727         h = fl2i((width / ratio) + 0.5f);
 728
 729         if (h > height) {
 730                 h = height;
 731                 w = fl2i((height * ratio) + 0.5f);
 732         }
 733
 734         x = (width - w) / 2;
 735         y = (height - h) / 2;
 736
 737         GL_viewport_x = x;
 738         GL_viewport_y = y;
 739         GL_viewport_w = w;
 740         GL_viewport_h = h;
 741         GL_viewport_scale_w = w / i2fl(gr_screen.max_w);
 742         GL_viewport_scale_h = h / i2fl(gr_screen.max_h);
 743
 744         glViewport(GL_viewport_x, GL_viewport_y, GL_viewport_w, GL_viewport_h);
 745
 746         glMatrixMode(GL_PROJECTION);
 747         glLoadIdentity();
 748         glOrtho(0, GL_viewport_w, GL_viewport_h, 0, 0.0, 1.0);
 749         glMatrixMode(GL_MODELVIEW);
 750         glLoadIdentity();
 751         glScalef(GL_viewport_scale_w, GL_viewport_scale_h, 1.0f);
 752
 753         // free mouse cursor storage, since the size might have changed
 754         if (Gr_opengl_mouse_saved_data) {
 755                 free(Gr_opengl_mouse_saved_data);
 756                 Gr_opengl_mouse_saved_data = NULL;
 757         }
 758
 759         // clear screen once to fix issues with edges on non-4:3
 760         gr_opengl_clear();
 761 }