cinelerra-5.1/guicast/vframe3d.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2011 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #define GL_GLEXT_PROTOTYPES
  23
  24 #include "bcpbuffer.h"
  25 #include "bcresources.h"
  26 #include "bcsignals.h"
  27 #include "bcsynchronous.h"
  28 #include "bctexture.h"
  29 #include "bcwindowbase.h"
  30 #include "vframe.h"
  31
  32 #if defined(HAVE_CONFIG_H)
  33 #include "config.h"
  34 #endif
  35 #ifdef HAVE_GL
  36 #include <GL/gl.h>
  37 #include <GL/glext.h>
  38 #endif
  39
  40 #include <stdarg.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43 #include <unistd.h>
  44
  45 int VFrame::get_opengl_state()
  46 {
  47         return opengl_state;
  48 }
  49
  50 void VFrame::set_opengl_state(int value)
  51 {
  52         opengl_state = value;
  53 }
  54
  55 int VFrame::get_window_id()
  56 {
  57         return texture ? texture->window_id : -1;
  58 }
  59
  60 int VFrame::get_texture_id()
  61 {
  62         return texture ? texture->texture_id : -1;
  63 }
  64
  65 int VFrame::get_texture_w()
  66 {
  67         return texture ? texture->texture_w : 0;
  68 }
  69
  70 int VFrame::get_texture_h()
  71 {
  72         return texture ? texture->texture_h : 0;
  73 }
  74
  75
  76 int VFrame::get_texture_components()
  77 {
  78         return texture ? texture->texture_components : 0;
  79 }
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91 void VFrame::to_texture()
  92 {
  93 #ifdef HAVE_GL
  94
  95 // Must be here so user can create textures without copying data by setting
  96 // opengl_state to TEXTURE.
  97         BC_Texture::new_texture(&texture, get_w(), get_h(), get_color_model());
  98
  99 // Determine what to do based on state
 100         switch(opengl_state) {
 101         case VFrame::TEXTURE:
 102                 return;
 103
 104         case VFrame::SCREEN:
 105                 if((get_w() % 4) || (get_h() % 4)) {
 106                         printf("VFrame::to_texture w=%d h=%d\n", get_w(), get_h());
 107                         return;
 108                 }
 109                 if(pbuffer) {
 110                         enable_opengl();
 111                         screen_to_texture();
 112                 }
 113                 opengl_state = VFrame::TEXTURE;
 114                 return;
 115         }
 116
 117 //printf("VFrame::to_texture %d\n", texture_id);
 118         GLenum type, format;
 119         switch(color_model) {
 120         case BC_RGB888:
 121         case BC_YUV888:
 122                 type = GL_UNSIGNED_BYTE;
 123                 format = GL_RGB;
 124                 break;
 125
 126         case BC_RGBA8888:
 127         case BC_YUVA8888:
 128                 type = GL_UNSIGNED_BYTE;
 129                 format = GL_RGBA;
 130                 break;
 131
 132         case BC_RGB_FLOAT:
 133                 type = GL_FLOAT;
 134                 format = GL_RGB;
 135                 break;
 136
 137         case BC_RGBA_FLOAT:
 138                 format = GL_RGBA;
 139                 type = GL_FLOAT;
 140                 break;
 141
 142         default:
 143                 fprintf(stderr,
 144                         "VFrame::to_texture: unsupported color model %d.\n",
 145                         color_model);
 146                 return;
 147         }
 148
 149         glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, get_w(), get_h(),
 150                 format, type, get_rows()[0]);
 151         opengl_state = VFrame::TEXTURE;
 152 #endif
 153 }
 154
 155 void VFrame::create_pbuffer()
 156 {
 157         if(pbuffer &&
 158                 pbuffer->window_id != BC_WindowBase::get_synchronous()->current_window->get_id())
 159         {
 160                 delete pbuffer;
 161                 pbuffer = 0;
 162         }
 163
 164         if((get_w() % 4) || (get_h() % 4))
 165         {
 166                 printf("VFrame::create_pbuffer w=%d h=%d\n", get_w(), get_h());
 167                 return;
 168         }
 169
 170         if(!pbuffer)
 171         {
 172                 pbuffer = new BC_PBuffer(get_w(), get_h());
 173         }
 174 }
 175
 176 void VFrame::enable_opengl()
 177 {
 178         create_pbuffer();
 179         if(pbuffer)
 180         {
 181                 pbuffer->enable_opengl();
 182         }
 183 }
 184
 185 BC_PBuffer* VFrame::get_pbuffer()
 186 {
 187         return pbuffer;
 188 }
 189
 190
 191 void VFrame::screen_to_texture(int x, int y, int w, int h)
 192 {
 193 #ifdef HAVE_GL
 194 // Create texture
 195         BC_Texture::new_texture(&texture,
 196                 get_w(), get_h(), get_color_model());
 197
 198         if(pbuffer) {
 199                 glEnable(GL_TEXTURE_2D);
 200
 201 // Read canvas into texture, use back texture for DOUBLE_BUFFER
 202 #if 1
 203 // According to the man page, it must be GL_BACK for the onscreen buffer
 204 // and GL_FRONT for a single buffered PBuffer.  In reality it must be
 205 // GL_BACK for a single buffered PBuffer if the PBuffer has alpha and using
 206 // GL_FRONT captures the onscreen front buffer.
 207 // 10/11/2010 is now generating "illegal operation"
 208                 glReadBuffer(GL_BACK);
 209 #else
 210                 glReadBuffer(BC_WindowBase::get_synchronous()->is_pbuffer ?
 211                         GL_FRONT : GL_BACK);
 212 #endif
 213                 glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
 214                         x >= 0 ? x : 0, y >= 0 ? y : 0,
 215                         w >= 0 ? w : get_w(), h >= 0 ? h : get_h());
 216         }
 217 #endif
 218 }
 219
 220 void VFrame::screen_to_ram()
 221 {
 222 #ifdef HAVE_GL
 223         enable_opengl();
 224         glReadBuffer(GL_BACK);
 225         int type = BC_CModels::is_float(color_model) ? GL_FLOAT : GL_UNSIGNED_BYTE;
 226         int format = BC_CModels::has_alpha(color_model) ? GL_RGBA : GL_RGB;
 227         glReadPixels(0, 0, get_w(), get_h(), format, type, get_rows()[0]);
 228         opengl_state = VFrame::RAM;
 229 #endif
 230 }
 231
 232 void VFrame::draw_texture(float in_x1,
 233                 float in_y1,
 234                 float in_x2,
 235                 float in_y2,
 236                 float out_x1,
 237                 float out_y1,
 238                 float out_x2,
 239                 float out_y2,
 240                 int flip_y)
 241 {
 242 #ifdef HAVE_GL
 243         glBegin(GL_QUADS);
 244         glNormal3f(0, 0, 1.0);
 245
 246         glTexCoord2f(in_x1 / get_texture_w(), in_y1 / get_texture_h());
 247         glVertex3f(out_x1, flip_y ? -out_y1 : -out_y2, 0);
 248
 249         glTexCoord2f(in_x2 / get_texture_w(), in_y1 / get_texture_h());
 250         glVertex3f(out_x2, flip_y ? -out_y1 : -out_y2, 0);
 251
 252         glTexCoord2f(in_x2 / get_texture_w(), in_y2 / get_texture_h());
 253         glVertex3f(out_x2, flip_y ? -out_y2 : -out_y1, 0);
 254
 255         glTexCoord2f(in_x1 / get_texture_w(), in_y2 / get_texture_h());
 256         glVertex3f(out_x1, flip_y ? -out_y2 : -out_y1, 0);
 257
 258
 259         glEnd();
 260
 261 #endif
 262 }
 263
 264 void VFrame::draw_texture(int flip_y)
 265 {
 266         draw_texture(0,
 267                 0,
 268                 get_w(),
 269                 get_h(),
 270                 0,
 271                 0,
 272                 get_w(),
 273                 get_h(),
 274                 flip_y);
 275 }
 276
 277
 278 void VFrame::bind_texture(int texture_unit)
 279 {
 280 // Bind the texture
 281         if(texture)
 282         {
 283                 texture->bind(texture_unit);
 284         }
 285 }
 286
 287
 288
 289
 290
 291
 292 void VFrame::init_screen(int w, int h)
 293 {
 294 #ifdef HAVE_GL
 295         glViewport(0, 0, w, h);
 296         glMatrixMode(GL_PROJECTION);
 297         glLoadIdentity();
 298         float near = 1;
 299         float far = 100;
 300         float frustum_ratio = near / ((near + far)/2);
 301         float near_h = (float)h * frustum_ratio;
 302         float near_w = (float)w * frustum_ratio;
 303         glFrustum(-near_w/2, near_w/2, -near_h/2, near_h/2, near, far);
 304         glMatrixMode(GL_MODELVIEW);
 305         glLoadIdentity();
 306 // Shift down and right so 0,0 is the top left corner
 307         glTranslatef(-w/2, h/2, 0.0);
 308         glTranslatef(0.0, 0.0, -(far + near) / 2);
 309
 310         glDisable(GL_DEPTH_TEST);
 311         glShadeModel(GL_SMOOTH);
 312 // Default for direct copy playback
 313         glDisable(GL_BLEND);
 314         glDisable(GL_COLOR_MATERIAL);
 315         glDisable(GL_CULL_FACE);
 316         glEnable(GL_NORMALIZE);
 317         glAlphaFunc(GL_ALWAYS, 0);
 318         glDisable(GL_ALPHA_TEST);
 319         glDisable(GL_LIGHTING);
 320
 321         const GLfloat zero[] = { 0, 0, 0, 0 };
 322 //      const GLfloat one[] = { 1, 1, 1, 1 };
 323 //      const GLfloat light_position[] = { 0, 0, -1, 0 };
 324 //      const GLfloat light_direction[] = { 0, 0, 1, 0 };
 325
 326 //      glEnable(GL_LIGHT0);
 327 //      glLightfv(GL_LIGHT0, GL_AMBIENT, zero);
 328 //      glLightfv(GL_LIGHT0, GL_DIFFUSE, one);
 329 //      glLightfv(GL_LIGHT0, GL_SPECULAR, one);
 330 //      glLighti(GL_LIGHT0, GL_SPOT_CUTOFF, 180);
 331 //      glLightfv(GL_LIGHT0, GL_POSITION, light_position);
 332 //      glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, light_direction);
 333 //      glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1);
 334 //      glLightModelfv(GL_LIGHT_MODEL_AMBIENT, zero);
 335         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, zero);
 336         glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, zero);
 337         glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, zero);
 338         glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, zero);
 339         glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 0);
 340 #endif
 341 }
 342
 343 void VFrame::init_screen()
 344 {
 345         init_screen(get_w(), get_h());
 346 }
 347
 348 static int print_error(char *source, unsigned int object, int is_program)
 349 {
 350 #ifdef HAVE_GL
 351     char string[BCTEXTLEN];
 352         int len = 0;
 353     if(is_program)
 354                 glGetProgramInfoLog(object, BCTEXTLEN, &len, string);
 355         else
 356                 glGetShaderInfoLog(object, BCTEXTLEN, &len, string);
 357         if(len > 0) printf("Playback3D::print_error:\n%s\n%s\n", source, string);
 358         if(len > 0) return 1;
 359         return 0;
 360 #endif
 361 }
 362
 363
 364
 365
 366
 367 unsigned int VFrame::make_shader(int x, ...)
 368 {
 369         unsigned int result = 0;
 370 #ifdef HAVE_GL
 371 // Construct single source file out of arguments
 372         char *complete_program = 0;
 373         int complete_size = 0;
 374         int current_shader = 0;
 375
 376         va_list list;
 377         va_start(list, x);
 378
 379         while(1)
 380         {
 381                 char *text = va_arg(list, char*);
 382                 if(!text) break;
 383
 384 // Replace one occurrance in each source of main() with a unique id.
 385                 char main_replacement[BCTEXTLEN];
 386                 sprintf(main_replacement, "main%03d()", current_shader);
 387 //printf("VFrame::make_shader %s %s\n", text, main_replacement);
 388                 char *source_replacement = new char[strlen(text) + strlen(main_replacement) + 1];
 389                 char *ptr = strstr(text, "main()");
 390
 391                 if(ptr)
 392                 {
 393                         memcpy(source_replacement, text, ptr - text);
 394                         source_replacement[ptr - text] = 0;
 395                         strcat(source_replacement, main_replacement);
 396                         ptr += strlen("main()");
 397                         strcat(source_replacement, ptr);
 398                         current_shader++;
 399                 }
 400                 else
 401                 {
 402                         memcpy(source_replacement, text, strlen(text));
 403                         source_replacement[strlen(text)] = 0;
 404                 }
 405
 406                 if(!complete_program)
 407                 {
 408                         complete_size = strlen(source_replacement) + 1;
 409                         complete_program = (char*)malloc(complete_size);
 410                         strcpy(complete_program, source_replacement);
 411                 }
 412                 else
 413                 {
 414                         complete_size += strlen(source_replacement);
 415                         complete_program = (char*)realloc(complete_program, complete_size);
 416                         strcat(complete_program, source_replacement);
 417                 }
 418
 419                 delete [] source_replacement;
 420         }
 421         va_end(list);
 422
 423 // Add main() function which calls all the unique main replacements in order
 424         char main_function[BCTEXTLEN];
 425         sprintf(main_function,
 426                 "\n"
 427                 "void main()\n"
 428                 "{\n");
 429
 430         for(int i = 0; i < current_shader; i++)
 431         {
 432                 char main_replacement[BCTEXTLEN];
 433                 sprintf(main_replacement, "\tmain%03d();\n", i);
 434                 strcat(main_function, main_replacement);
 435         }
 436
 437         strcat(main_function, "}\n");
 438         if(!complete_program)
 439         {
 440                 complete_size = strlen(main_function) + 1;
 441                 complete_program = (char*)malloc(complete_size);
 442                 strcpy(complete_program, main_function);
 443         }
 444         else
 445         {
 446                 complete_size += strlen(main_function);
 447                 complete_program = (char*)realloc(complete_program, complete_size);
 448                 strcat(complete_program, main_function);
 449         }
 450
 451
 452
 453
 454
 455         int got_it = 0;
 456         result = BC_WindowBase::get_synchronous()->get_shader(complete_program,
 457                 &got_it);
 458
 459         if(!got_it)
 460         {
 461                 result = glCreateProgram();
 462
 463                 unsigned int shader;
 464                 shader = glCreateShader(GL_FRAGMENT_SHADER);
 465                 const GLchar *text_ptr = complete_program;
 466                 glShaderSource(shader, 1, &text_ptr, NULL);
 467                 glCompileShader(shader);
 468                 int error = print_error(complete_program, shader, 0);
 469                 glAttachShader(result, shader);
 470                 glDeleteShader(shader);
 471
 472                 glLinkProgram(result);
 473                 if(!error) error = print_error(complete_program, result, 1);
 474
 475
 476 // printf("BC_WindowBase::make_shader: shader=%d window_id=%d\n",
 477 // result,
 478 // BC_WindowBase::get_synchronous()->current_window->get_id());
 479                 BC_WindowBase::get_synchronous()->put_shader(result, complete_program);
 480         }
 481
 482 //printf("VFrame::make_shader\n%s\n", complete_program);
 483         free(complete_program);
 484         complete_program = NULL;
 485
 486 #endif
 487         return result;
 488 }
 489
 490 void VFrame::dump_shader(int shader_id)
 491 {
 492         BC_WindowBase::get_synchronous()->dump_shader(shader_id);
 493 }
 494
 495
 496 void VFrame::clear_pbuffer()
 497 {
 498 #ifdef HAVE_GL
 499         if(BC_CModels::is_yuv(get_color_model()))
 500                 glClearColor(0.0, 0.5, 0.5, 0.0);
 501         else
 502                 glClearColor(0.0, 0.0, 0.0, 0.0);
 503         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 504 #endif
 505 }
 506