src/graphics/grgl2.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_opengles2.h"
  10
  11 #include "gropengl.h"
  12 #include "gropenglinternal.h"
  13 #include "grgl2.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_two_inited = 0;
  25
  26 bool Use_mipmaps = false;
  27
  28 static GLuint FB_texture = 0;
  29 static GLuint FB_id = 0;
  30 static GLuint FB_rb_id = 0;
  31
  32 static GLuint GL_saved_screen_tex = 0;
  33 static GLuint GL_stream_tex = 0;
  34
  35
  36 static gr_alpha_blend GL_current_alpha_blend = (gr_alpha_blend) -1;
  37 static gr_zbuffer_type GL_current_zbuffer_type = (gr_zbuffer_type) -1;
  38
  39 void opengl2_set_state(gr_texture_source ts, gr_alpha_blend ab, gr_zbuffer_type zt)
  40 {
  41         opengl2_set_texture_state(ts);
  42
  43         if (ab != GL_current_alpha_blend) {
  44                 switch (ab) {
  45                         case ALPHA_BLEND_NONE:                  // 1*SrcPixel + 0*DestPixel
  46                                 glBlendFunc(GL_ONE, GL_ZERO);
  47                                 break;
  48                         case ALPHA_BLEND_ADDITIVE:              // 1*SrcPixel + 1*DestPixel
  49                                 glBlendFunc(GL_ONE, GL_ONE);
  50                                 break;
  51                         case ALPHA_BLEND_ALPHA_ADDITIVE:        // Alpha*SrcPixel + 1*DestPixel
  52                                 glBlendFunc(GL_SRC_ALPHA, GL_ONE);
  53                                 break;
  54                         case ALPHA_BLEND_ALPHA_BLEND_ALPHA:     // Alpha*SrcPixel + (1-Alpha)*DestPixel
  55                                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  56                                 break;
  57                         case ALPHA_BLEND_ALPHA_BLEND_SRC_COLOR: // Alpha*SrcPixel + (1-SrcPixel)*DestPixel
  58                                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_COLOR);
  59                                 break;
  60                         default:
  61                                 break;
  62                 }
  63
  64                 GL_current_alpha_blend = ab;
  65         }
  66
  67         if (zt != GL_current_zbuffer_type) {
  68                 switch (zt) {
  69                         case ZBUFFER_TYPE_NONE:
  70                                 glDepthFunc(GL_ALWAYS);
  71                                 glDepthMask(GL_FALSE);
  72                                 break;
  73                         case ZBUFFER_TYPE_READ:
  74                                 glDepthFunc(GL_LESS);
  75                                 glDepthMask(GL_FALSE);
  76                                 break;
  77                         case ZBUFFER_TYPE_WRITE:
  78                                 glDepthFunc(GL_ALWAYS);
  79                                 glDepthMask(GL_TRUE);
  80                                 break;
  81                         case ZBUFFER_TYPE_FULL:
  82                                 glDepthFunc(GL_LESS);
  83                                 glDepthMask(GL_TRUE);
  84                                 break;
  85                         default:
  86                                 break;
  87                 }
  88
  89                 GL_current_zbuffer_type = zt;
  90         }
  91 }
  92
  93 static void opengl2_init_func_pointers()
  94 {
  95         gr_screen.gf_flip = gr_opengl2_flip;
  96         gr_screen.gf_set_clip = gr_opengl2_set_clip;
  97         gr_screen.gf_reset_clip = gr_opengl_reset_clip;
  98
  99         gr_screen.gf_clear = gr_opengl_clear;
 100
 101         gr_screen.gf_aabitmap = gr_opengl2_aabitmap;
 102         gr_screen.gf_aabitmap_ex = gr_opengl2_aabitmap_ex;
 103
 104         gr_screen.gf_rect = gr_opengl2_rect;
 105         gr_screen.gf_shade = gr_opengl2_shade;
 106         gr_screen.gf_string = gr_opengl2_string;
 107         gr_screen.gf_circle = gr_opengl2_circle;
 108
 109         gr_screen.gf_line = gr_opengl2_line;
 110         gr_screen.gf_aaline = gr_opengl2_aaline;
 111         gr_screen.gf_pixel = gr_opengl2_pixel;
 112         gr_screen.gf_scaler = gr_opengl2_scaler;
 113         gr_screen.gf_tmapper = gr_opengl2_tmapper;
 114
 115         gr_screen.gf_gradient = gr_opengl2_gradient;
 116
 117         gr_screen.gf_print_screen = gr_opengl_print_screen;
 118
 119         gr_screen.gf_fade_in = gr_opengl2_fade_in;
 120         gr_screen.gf_fade_out = gr_opengl2_fade_out;
 121         gr_screen.gf_flash = gr_opengl2_flash;
 122
 123         gr_screen.gf_zbuffer_clear = gr_opengl2_zbuffer_clear;
 124
 125         gr_screen.gf_save_screen = gr_opengl2_save_screen;
 126         gr_screen.gf_restore_screen = gr_opengl2_restore_screen;
 127         gr_screen.gf_free_screen = gr_opengl2_free_screen;
 128
 129         gr_screen.gf_dump_frame_start = gr_opengl2_dump_frame_start;
 130         gr_screen.gf_dump_frame_stop = gr_opengl2_dump_frame_stop;
 131         gr_screen.gf_dump_frame = gr_opengl2_dump_frame;
 132
 133         gr_screen.gf_stream_start = gr_opengl2_stream_start;
 134         gr_screen.gf_stream_frame = gr_opengl2_stream_frame;
 135         gr_screen.gf_stream_stop = gr_opengl2_stream_stop;
 136
 137         gr_screen.gf_set_gamma = gr_opengl2_set_gamma;
 138
 139         gr_screen.gf_lock = gr_opengl_lock;
 140         gr_screen.gf_unlock = gr_opengl_unlock;
 141
 142         gr_screen.gf_fog_set = gr_opengl2_fog_set;
 143
 144         gr_screen.gf_get_region = gr_opengl2_get_region;
 145
 146         gr_screen.gf_set_cull = gr_opengl_set_cull;
 147
 148         gr_screen.gf_cross_fade = gr_opengl2_cross_fade;
 149
 150         gr_screen.gf_preload_init = gr_opengl2_preload_init;
 151         gr_screen.gf_preload = gr_opengl2_preload;
 152
 153         gr_screen.gf_zbias = gr_opengl_zbias;
 154
 155         gr_screen.gf_set_viewport = gr_opengl2_set_viewport;
 156
 157         gr_screen.gf_activate = gr_opengl_activate;
 158
 159         gr_screen.gf_release_texture = gr_opengl2_release_texture;
 160 }
 161
 162 static int opengl2_create_framebuffer()
 163 {
 164         // create texture
 165         glGenTextures(1, &FB_texture);
 166         glBindTexture(GL_TEXTURE_2D, FB_texture);
 167
 168         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 169         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 170         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 171         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 172
 173         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, gr_screen.max_w, gr_screen.max_h, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 174
 175         glBindTexture(GL_TEXTURE_2D, 0);
 176
 177         // create renderbuffer
 178         glGenRenderbuffers(1, &FB_rb_id);
 179         glBindRenderbuffer(GL_RENDERBUFFER, FB_rb_id);
 180
 181         glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, gr_screen.max_w, gr_screen.max_h);
 182
 183         // create framebuffer
 184         glGenFramebuffers(1, &FB_id);
 185         glBindFramebuffer(GL_FRAMEBUFFER, FB_id);
 186
 187         // attach texture and renderbuffer
 188         glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, FB_texture, 0);
 189         glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, FB_rb_id);
 190
 191         GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
 192
 193         glBindFramebuffer(GL_FRAMEBUFFER, 0);
 194
 195         if (status != GL_FRAMEBUFFER_COMPLETE) {
 196                 glBindFramebuffer(GL_FRAMEBUFFER, 0);
 197
 198                 if (FB_texture) {
 199                         glDeleteTextures(1, &FB_texture);
 200                         FB_texture = 0;
 201                 }
 202
 203                 if (FB_rb_id) {
 204                         glDeleteRenderbuffers(1, &FB_rb_id);
 205                         FB_rb_id = 0;
 206                 }
 207
 208                 if (FB_id) {
 209                         glDeleteFramebuffers(1, &FB_id);
 210                         FB_id = 0;
 211                 }
 212
 213                 return 0;
 214         }
 215
 216         return 1;
 217 }
 218
 219 void opengl2_cleanup()
 220 {
 221         if ( !GL_two_inited ) {
 222                 return;
 223         }
 224
 225         glBindFramebuffer(GL_FRAMEBUFFER, 0);
 226
 227         if (FB_texture) {
 228                 glDeleteTextures(1, &FB_texture);
 229                 FB_texture = 0;
 230         }
 231
 232         if (FB_rb_id) {
 233                 glDeleteRenderbuffers(1, &FB_rb_id);
 234                 FB_rb_id = 0;
 235         }
 236
 237         if (FB_id) {
 238                 glDeleteFramebuffers(1, &FB_id);
 239                 FB_id = 0;
 240         }
 241
 242         opengl2_tcache_cleanup();
 243         opengl2_shader_cleanup();
 244
 245         if (GL_context) {
 246                 SDL_GL_DeleteContext(GL_context);
 247                 GL_context = NULL;
 248         }
 249
 250         GL_two_inited = 0;
 251 }
 252
 253 int opengl2_init()
 254 {
 255         if (GL_two_inited) {
 256                 return 1;
 257         }
 258
 259         GL_two_inited = 1;
 260
 261         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
 262         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
 263         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
 264
 265         GL_context = SDL_GL_CreateContext(GL_window);
 266
 267         if ( !GL_context ) {
 268                 opengl2_cleanup();
 269                 return 0;
 270         }
 271
 272         mprintf(("  Vendor   : %s\n", glGetString(GL_VENDOR)));
 273         mprintf(("  Renderer : %s\n", glGetString(GL_RENDERER)));
 274         mprintf(("  Version  : %s\n", glGetString(GL_VERSION)));
 275
 276         // initial viewport setup
 277         gr_opengl2_set_viewport(gr_screen.max_w, gr_screen.max_h);
 278
 279         // set up generic variables
 280         opengl_set_variables();
 281
 282         opengl2_init_func_pointers();
 283         opengl2_tcache_init();
 284
 285         if ( !opengl2_shader_init() ) {
 286                 opengl2_cleanup();
 287                 return 0;
 288         }
 289
 290         if ( !opengl2_create_framebuffer() ) {
 291                 opengl2_cleanup();
 292                 return 0;
 293         }
 294
 295         glEnable(GL_DITHER);
 296         glEnable(GL_DEPTH_TEST);
 297         glEnable(GL_BLEND);
 298         glEnable(GL_TEXTURE_2D);
 299
 300         glDepthRangef(0.0f, 1.0f);
 301
 302         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 303         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 304
 305         if ( SDL_GL_ExtensionSupported("GL_OES_texture_npot") ) {
 306                 Use_mipmaps     = true;
 307         }
 308
 309         mprintf(("  Mipmaps  : %s\n", Use_mipmaps ? "Enabled" : "Disabled"));
 310
 311         glFlush();
 312
 313         gr_opengl_clear();
 314         gr_opengl_set_cull(1);
 315
 316         return 1;
 317 }
 318
 319 void gr_opengl2_flip()
 320 {
 321         if ( !GL_two_inited ) {
 322                 return;
 323         }
 324
 325 #ifndef NDEBUG
 326         static bool show_cursor = false;
 327 #endif
 328
 329         glBindFramebuffer(GL_FRAMEBUFFER, 0);
 330
 331         gr_opengl_reset_clip();
 332
 333         // set viewport to window size
 334         glViewport(GL_viewport_x, GL_viewport_y, GL_viewport_w, GL_viewport_h);
 335
 336         glClear(GL_COLOR_BUFFER_BIT);
 337
 338         {
 339                 float x = 0.0f;
 340                 float y = 0.0f;
 341                 float w = i2fl(GL_viewport_w);
 342                 float h = i2fl(GL_viewport_h);
 343
 344                 const float tex_coord[] = { 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f };
 345                 const float ver_coord[] = { x, y, x, h, w, y, w, h };
 346
 347                 opengl2_shader_use(PROG_WINDOW);
 348
 349                 glEnableVertexAttribArray(SDRI_POSITION);
 350                 glVertexAttribPointer(SDRI_POSITION, 2, GL_FLOAT, GL_FALSE, 0, &ver_coord);
 351
 352                 glEnableVertexAttribArray(SDRI_TEXCOORD);
 353                 glVertexAttribPointer(SDRI_TEXCOORD, 2, GL_FLOAT, GL_FALSE, 0, &tex_coord);
 354
 355                 glBindTexture(GL_TEXTURE_2D, FB_texture);
 356
 357                 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 358
 359                 glBindTexture(GL_TEXTURE_2D, 0);
 360
 361                 glDisableVertexAttribArray(SDRI_TEXCOORD);
 362                 glDisableVertexAttribArray(SDRI_POSITION);
 363         }
 364
 365         mouse_eval_deltas();
 366
 367         if ( mouse_is_visible() ) {
 368                 int mx, my;
 369
 370                 mouse_get_pos(&mx, &my);
 371
 372                 float u_scale, v_scale;
 373
 374                 if ( opengl2_tcache_set(Gr_cursor, TCACHE_TYPE_BITMAP_INTERFACE, &u_scale, &v_scale, 0) ) {
 375                         opengl2_set_state(TEXTURE_SOURCE_DECAL, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE);
 376
 377                         int bw, bh;
 378                         bm_get_info(Gr_cursor, &bw, &bh);
 379
 380                         float x = i2fl(mx) * GL_viewport_scale_w;
 381                         float y = i2fl(my) * GL_viewport_scale_h;
 382                         float w = x + (bw * GL_viewport_scale_w);
 383                         float h = y + (bh * GL_viewport_scale_h);
 384
 385                         const float tex_coord[] = { 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f };
 386                         const float ver_coord[] = { x, y, x, h, w, y, w, h };
 387
 388                         opengl2_shader_use(PROG_WINDOW);
 389
 390                         glEnableVertexAttribArray(SDRI_POSITION);
 391                         glVertexAttribPointer(SDRI_POSITION, 2, GL_FLOAT, GL_FALSE, 0, &ver_coord);
 392
 393                         glEnableVertexAttribArray(SDRI_TEXCOORD);
 394                         glVertexAttribPointer(SDRI_TEXCOORD, 2, GL_FLOAT, GL_FALSE, 0, &tex_coord);
 395
 396                         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 397
 398                         glDisableVertexAttribArray(SDRI_TEXCOORD);
 399                         glDisableVertexAttribArray(SDRI_POSITION);
 400                 }
 401 #ifndef NDEBUG
 402                 else if ( !show_cursor ) {
 403                         SDL_ShowCursor(1);
 404                         show_cursor = true;
 405                 }
 406 #endif
 407         }
 408
 409 #ifndef NDEBUG
 410         GLenum error = GL_NO_ERROR;
 411
 412         do {
 413                 error = glGetError();
 414
 415                 if (error != GL_NO_ERROR) {
 416                         nprintf(("Warning", "!!DEBUG!! OpenGL Error: %d\n", error));
 417                 }
 418         } while (error != GL_NO_ERROR);
 419 #endif
 420
 421         SDL_GL_SwapWindow(GL_window);
 422
 423         opengl2_tcache_frame();
 424
 425         glBindFramebuffer(GL_FRAMEBUFFER, FB_id);
 426
 427         // set viewport to game screen size
 428         glViewport(0, 0, gr_screen.max_w, gr_screen.max_h);
 429 }
 430
 431 void gr_opengl2_set_clip(int x, int y, int w, int h)
 432 {
 433         // check for sanity of parameters
 434         CAP(x, 0, gr_screen.max_w - 1);
 435         CAP(y, 0, gr_screen.max_h - 1);
 436         CAP(w, 0, gr_screen.max_w - x);
 437         CAP(h, 0, gr_screen.max_h - y);
 438
 439         gr_screen.offset_x = x;
 440         gr_screen.offset_y = y;
 441         gr_screen.clip_left = 0;
 442         gr_screen.clip_right = w-1;
 443         gr_screen.clip_top = 0;
 444         gr_screen.clip_bottom = h-1;
 445         gr_screen.clip_width = w;
 446         gr_screen.clip_height = h;
 447
 448         glEnable(GL_SCISSOR_TEST);
 449         glScissor(x, gr_screen.max_h-y-h, w, h);
 450 }
 451
 452 void gr_opengl2_fog_set(int fog_mode, int r, int g, int b, float fog_near, float fog_far)
 453 {
 454         gr_screen.current_fog_mode = fog_mode;
 455
 456         if (fog_mode == GR_FOGMODE_NONE) {
 457                 return;
 458         }
 459
 460         gr_screen.fog_near = fog_near;
 461         gr_screen.fog_far = fog_far;
 462
 463         gr_init_color(&gr_screen.current_fog_color, r, g, b);
 464 }
 465
 466 void gr_opengl2_zbuffer_clear(int mode)
 467 {
 468         if (mode) {
 469                 Gr_zbuffering = 1;
 470                 Gr_zbuffering_mode = GR_ZBUFF_FULL;
 471                 Gr_global_zbuffering = 1;
 472
 473                 opengl2_set_state(TEXTURE_SOURCE_NONE, ALPHA_BLEND_NONE, ZBUFFER_TYPE_FULL);
 474                 glClear(GL_DEPTH_BUFFER_BIT);
 475         } else {
 476                 Gr_zbuffering = 0;
 477                 Gr_zbuffering_mode = GR_ZBUFF_NONE;
 478                 Gr_global_zbuffering = 0;
 479         }
 480 }
 481
 482 void gr_opengl2_fade_in(int instantaneous)
 483 {
 484
 485 }
 486
 487 void gr_opengl2_fade_out(int instantaneous)
 488 {
 489
 490 }
 491
 492 void gr_opengl2_get_region(int front, int w, int h, ubyte *data)
 493 {
 494         opengl2_set_state(TEXTURE_SOURCE_NO_FILTERING, ALPHA_BLEND_NONE, ZBUFFER_TYPE_NONE);
 495
 496         GLenum pxtype = GL_UNSIGNED_SHORT_5_5_5_1;
 497
 498         if (gr_screen.bytes_per_pixel == 4) {
 499                 pxtype = GL_UNSIGNED_BYTE;
 500         }
 501
 502         glReadPixels(0, gr_screen.max_h-h-1, w, h, GL_RGBA, pxtype, data);
 503 }
 504
 505 int gr_opengl2_save_screen()
 506 {
 507         gr_opengl_reset_clip();
 508
 509         if (GL_saved_screen_tex) {
 510                 mprintf(( "Screen already saved!\n" ));
 511                 return -1;
 512         }
 513
 514         glGenTextures(1, &GL_saved_screen_tex);
 515
 516         if ( !GL_saved_screen_tex ) {
 517                 mprintf(( "Couldn't create texture for saved screen!\n" ));
 518                 return -1;
 519         }
 520
 521         glBindTexture(GL_TEXTURE_2D, GL_saved_screen_tex);
 522
 523         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 524         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 525         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 526         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 527
 528         glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0,
 529                         gr_screen.max_w, gr_screen.max_h, 0);
 530
 531         glBindTexture(GL_TEXTURE_2D, 0);
 532
 533         return 0;
 534 }
 535
 536 void gr_opengl2_restore_screen(int)
 537 {
 538         gr_opengl_reset_clip();
 539
 540         if ( !GL_saved_screen_tex ) {
 541                 gr_opengl_clear();
 542                 return;
 543         }
 544
 545         float x = 0.0f;
 546         float y = 0.0f;
 547         float w = i2fl(gr_screen.max_w);
 548         float h = i2fl(gr_screen.max_h);
 549
 550         const float tex_coord[] = { 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f };   // y-flipped
 551         const float ver_coord[] = { x, y, x, h, w, y, w, h };
 552
 553         opengl2_shader_use(PROG_TEX);
 554
 555         glVertexAttrib4f(SDRI_COLOR, 1.0f, 1.0f, 1.0f, 1.0f);
 556
 557         glEnableVertexAttribArray(SDRI_POSITION);
 558         glVertexAttribPointer(SDRI_POSITION, 2, GL_FLOAT, GL_FALSE, 0, &ver_coord);
 559
 560         glEnableVertexAttribArray(SDRI_TEXCOORD);
 561         glVertexAttribPointer(SDRI_TEXCOORD, 2, GL_FLOAT, GL_FALSE, 0, &tex_coord);
 562
 563         glBindTexture(GL_TEXTURE_2D, GL_saved_screen_tex);
 564
 565         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 566
 567         glBindTexture(GL_TEXTURE_2D, 0);
 568
 569         glDisableVertexAttribArray(SDRI_TEXCOORD);
 570         glDisableVertexAttribArray(SDRI_POSITION);
 571 }
 572
 573 void gr_opengl2_free_screen(int)
 574 {
 575         if (GL_saved_screen_tex) {
 576                 glDeleteTextures(1, &GL_saved_screen_tex);
 577                 GL_saved_screen_tex = 0;
 578         }
 579 }
 580
 581 void gr_opengl2_dump_frame_start(int first_frame, int frames_between_dumps)
 582 {
 583
 584 }
 585
 586 void gr_opengl2_dump_frame_stop()
 587 {
 588
 589 }
 590
 591 void gr_opengl2_dump_frame()
 592 {
 593
 594 }
 595
 596 static int GL_stream_w = 0;
 597 static int GL_stream_h = 0;
 598
 599 static rb_t GL_stream[4];
 600
 601 void gr_opengl2_stream_start(int x, int y, int w, int h)
 602 {
 603         if (GL_stream_tex) {
 604                 return;
 605         }
 606
 607         glGenTextures(1, &GL_stream_tex);
 608
 609         glBindTexture(GL_TEXTURE_2D, GL_stream_tex);
 610
 611         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 612         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 613         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 614         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 615
 616         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, NULL);
 617
 618         glBindTexture(GL_TEXTURE_2D, 0);
 619
 620         uint scale = os_config_read_uint("Video", "ScaleMovies", 1);
 621
 622         int sx, sy;
 623         int sw, sh;
 624
 625         if (x < 0) {
 626                 sx = scale ? 0 : ((gr_screen.max_w - w) / 2);
 627         } else {
 628                 sx = x;
 629         }
 630
 631         float h_factor = scale ? (gr_screen.max_w / i2fl(w)) : 1.0f;
 632
 633         if (y < 0) {
 634                 sy = (gr_screen.max_h - fl2i(h * h_factor)) / 2;
 635         } else {
 636                 sy = y;
 637         }
 638
 639         GL_stream_w = w;
 640         GL_stream_h = h;
 641
 642         if (scale) {
 643                 sw = gr_screen.max_w - (sx * 2);
 644                 sh = gr_screen.max_h - (sy * 2);
 645         } else {
 646                 sw = w;
 647                 sh = h;
 648         }
 649
 650         GL_stream[0].x = i2fl(sx);
 651         GL_stream[0].y = i2fl(sy);
 652         GL_stream[0].u = 0.0f;
 653         GL_stream[0].v = 0.0f;
 654
 655         GL_stream[1].x = i2fl(sx);
 656         GL_stream[1].y = i2fl(sy + sh);
 657         GL_stream[1].u = 0.0f;
 658         GL_stream[1].v = 1.0f;
 659
 660         GL_stream[2].x = i2fl(sx + sw);
 661         GL_stream[2].y = i2fl(sy);
 662         GL_stream[2].u = 1.0f;
 663         GL_stream[2].v = 0.0f;
 664
 665         GL_stream[3].x = i2fl(sx + sw);
 666         GL_stream[3].y = i2fl(sy + sh);
 667         GL_stream[3].u = 1.0f;
 668         GL_stream[3].v = 1.0f;
 669
 670         glDisable(GL_DEPTH_TEST);
 671 }
 672
 673 void gr_opengl2_stream_frame(ubyte *frame)
 674 {
 675         if ( !GL_stream_tex ) {
 676                 return;
 677         }
 678
 679         opengl2_shader_use(PROG_TEX);
 680
 681         glVertexAttrib4f(SDRI_COLOR, 1.0f, 1.0f, 1.0f, 1.0f);
 682
 683         glEnableVertexAttribArray(SDRI_POSITION);
 684         glVertexAttribPointer(SDRI_POSITION, 2, GL_FLOAT, GL_FALSE, sizeof(rb_t), &GL_stream[0].x);
 685
 686         glEnableVertexAttribArray(SDRI_TEXCOORD);
 687         glVertexAttribPointer(SDRI_TEXCOORD, 2, GL_FLOAT, GL_FALSE, sizeof(rb_t), &GL_stream[0].u);
 688
 689         glBindTexture(GL_TEXTURE_2D, GL_stream_tex);
 690
 691         glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, GL_stream_w, GL_stream_h, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, frame);
 692
 693         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 694
 695         glBindTexture(GL_TEXTURE_2D, 0);
 696
 697         glDisableVertexAttribArray(SDRI_TEXCOORD);
 698         glDisableVertexAttribArray(SDRI_POSITION);
 699 }
 700
 701 void gr_opengl2_stream_stop()
 702 {
 703         if (GL_stream_tex) {
 704                 glBindTexture(GL_TEXTURE_2D, 0);
 705                 glDeleteTextures(1, &GL_stream_tex);
 706                 GL_stream_tex = 0;
 707
 708                 glEnable(GL_DEPTH_TEST);
 709         }
 710 }
 711
 712 void gr_opengl2_set_viewport(int width, int height)
 713 {
 714         int w, h, x, y;
 715
 716         float ratio = gr_screen.max_w / i2fl(gr_screen.max_h);
 717
 718         w = width;
 719         h = fl2i((width / ratio) + 0.5f);
 720
 721         if (h > height) {
 722                 h = height;
 723                 w = fl2i((height * ratio) + 0.5f);
 724         }
 725
 726         x = (width - w) / 2;
 727         y = (height - h) / 2;
 728
 729         GL_viewport_x = x;
 730         GL_viewport_y = y;
 731         GL_viewport_w = w;
 732         GL_viewport_h = h;
 733         GL_viewport_scale_w = w / i2fl(gr_screen.max_w);
 734         GL_viewport_scale_h = h / i2fl(gr_screen.max_h);
 735
 736         opengl2_shader_update();
 737 }