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(
 233         float in_x1, float in_y1, float in_x2, float in_y2,
 234         float out_x1, float out_y1, float out_x2, float out_y2,
 235         int flip_y)
 236 {
 237 #ifdef HAVE_GL
 238         in_x1 /= get_texture_w();  in_y1 /= get_texture_h();
 239         in_x2 /= get_texture_w();  in_y2 /= get_texture_h();
 240         float ot_y1 = flip_y ? -out_y1 : -out_y2;
 241         float ot_y2 = flip_y ? -out_y2 : -out_y1;
 242         texture->draw_texture(
 243                 in_x1,in_y1,  in_x2,in_y2,
 244                 out_x1,ot_y1, out_x2, ot_y2);
 245 #endif
 246 }
 247
 248 void VFrame::draw_texture(int flip_y)
 249 {
 250         draw_texture(0,0,  get_w(),get_h(),
 251                 0,0, get_w(),get_h(), flip_y);
 252 }
 253
 254
 255 void VFrame::bind_texture(int texture_unit)
 256 {
 257 // Bind the texture
 258         if(texture)
 259         {
 260                 texture->bind(texture_unit);
 261         }
 262 }
 263
 264
 265
 266
 267
 268
 269 void VFrame::init_screen(int w, int h)
 270 {
 271 #ifdef HAVE_GL
 272         glViewport(0, 0, w, h);
 273         glMatrixMode(GL_PROJECTION);
 274         glLoadIdentity();
 275         float near = 1;
 276         float far = 100;
 277         float frustum_ratio = near / ((near + far)/2);
 278         float near_h = (float)h * frustum_ratio;
 279         float near_w = (float)w * frustum_ratio;
 280         glFrustum(-near_w/2, near_w/2, -near_h/2, near_h/2, near, far);
 281         glMatrixMode(GL_MODELVIEW);
 282         glLoadIdentity();
 283 // Shift down and right so 0,0 is the top left corner
 284         glTranslatef(-w/2, h/2, 0.0);
 285         glTranslatef(0.0, 0.0, -(far + near) / 2);
 286
 287         glDisable(GL_DEPTH_TEST);
 288         glShadeModel(GL_SMOOTH);
 289 // Default for direct copy playback
 290         glDisable(GL_BLEND);
 291         glDisable(GL_COLOR_MATERIAL);
 292         glDisable(GL_CULL_FACE);
 293         glEnable(GL_NORMALIZE);
 294         glAlphaFunc(GL_ALWAYS, 0);
 295         glDisable(GL_ALPHA_TEST);
 296         glDisable(GL_LIGHTING);
 297
 298         const GLfloat zero[] = { 0, 0, 0, 0 };
 299 //      const GLfloat one[] = { 1, 1, 1, 1 };
 300 //      const GLfloat light_position[] = { 0, 0, -1, 0 };
 301 //      const GLfloat light_direction[] = { 0, 0, 1, 0 };
 302
 303 //      glEnable(GL_LIGHT0);
 304 //      glLightfv(GL_LIGHT0, GL_AMBIENT, zero);
 305 //      glLightfv(GL_LIGHT0, GL_DIFFUSE, one);
 306 //      glLightfv(GL_LIGHT0, GL_SPECULAR, one);
 307 //      glLighti(GL_LIGHT0, GL_SPOT_CUTOFF, 180);
 308 //      glLightfv(GL_LIGHT0, GL_POSITION, light_position);
 309 //      glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, light_direction);
 310 //      glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1);
 311 //      glLightModelfv(GL_LIGHT_MODEL_AMBIENT, zero);
 312         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, zero);
 313         glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, zero);
 314         glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, zero);
 315         glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, zero);
 316         glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 0);
 317 #endif
 318 }
 319
 320 void VFrame::init_screen()
 321 {
 322         init_screen(get_w(), get_h());
 323 }
 324
 325 static int print_error(char *source, unsigned int object, int is_program)
 326 {
 327 #ifdef HAVE_GL
 328     char string[BCTEXTLEN];
 329         int len = 0;
 330     if(is_program)
 331                 glGetProgramInfoLog(object, BCTEXTLEN, &len, string);
 332         else
 333                 glGetShaderInfoLog(object, BCTEXTLEN, &len, string);
 334         if(len > 0) printf("Playback3D::print_error:\n%s\n%s\n", source, string);
 335         if(len > 0) return 1;
 336 #endif
 337         return 0;
 338 }
 339
 340
 341
 342
 343
 344 unsigned int VFrame::make_shader(int x, ...)
 345 {
 346         unsigned int result = 0;
 347 #ifdef HAVE_GL
 348 // Construct single source file out of arguments
 349         char *complete_program = 0;
 350         int complete_size = 0;
 351         int current_shader = 0;
 352
 353         va_list list;
 354         va_start(list, x);
 355
 356         while(1)
 357         {
 358                 char *text = va_arg(list, char*);
 359                 if(!text) break;
 360
 361 // Replace one occurrance in each source of main() with a unique id.
 362                 char main_replacement[BCTEXTLEN];
 363                 sprintf(main_replacement, "main%03d()", current_shader);
 364 //printf("VFrame::make_shader %s %s\n", text, main_replacement);
 365                 char *source_replacement = new char[strlen(text) + strlen(main_replacement) + 1];
 366                 char *ptr = strstr(text, "main()");
 367
 368                 if(ptr)
 369                 {
 370                         memcpy(source_replacement, text, ptr - text);
 371                         source_replacement[ptr - text] = 0;
 372                         strcat(source_replacement, main_replacement);
 373                         ptr += strlen("main()");
 374                         strcat(source_replacement, ptr);
 375                         current_shader++;
 376                 }
 377                 else
 378                 {
 379                         memcpy(source_replacement, text, strlen(text));
 380                         source_replacement[strlen(text)] = 0;
 381                 }
 382
 383                 if(!complete_program)
 384                 {
 385                         complete_size = strlen(source_replacement) + 1;
 386                         complete_program = (char*)malloc(complete_size);
 387                         strcpy(complete_program, source_replacement);
 388                 }
 389                 else
 390                 {
 391                         complete_size += strlen(source_replacement);
 392                         complete_program = (char*)realloc(complete_program, complete_size);
 393                         strcat(complete_program, source_replacement);
 394                 }
 395
 396                 delete [] source_replacement;
 397         }
 398         va_end(list);
 399
 400 // Add main() function which calls all the unique main replacements in order
 401         char main_function[BCTEXTLEN];
 402         sprintf(main_function,
 403                 "\n"
 404                 "void main()\n"
 405                 "{\n");
 406
 407         for(int i = 0; i < current_shader; i++)
 408         {
 409                 char main_replacement[BCTEXTLEN];
 410                 sprintf(main_replacement, "\tmain%03d();\n", i);
 411                 strcat(main_function, main_replacement);
 412         }
 413
 414         strcat(main_function, "}\n");
 415         if(!complete_program)
 416         {
 417                 complete_size = strlen(main_function) + 1;
 418                 complete_program = (char*)malloc(complete_size);
 419                 strcpy(complete_program, main_function);
 420         }
 421         else
 422         {
 423                 complete_size += strlen(main_function);
 424                 complete_program = (char*)realloc(complete_program, complete_size);
 425                 strcat(complete_program, main_function);
 426         }
 427
 428
 429
 430
 431
 432         int got_it = 0;
 433         result = BC_WindowBase::get_synchronous()->get_shader(complete_program,
 434                 &got_it);
 435
 436         if(!got_it)
 437         {
 438                 result = glCreateProgram();
 439
 440                 unsigned int shader;
 441                 shader = glCreateShader(GL_FRAGMENT_SHADER);
 442                 const GLchar *text_ptr = complete_program;
 443                 glShaderSource(shader, 1, &text_ptr, NULL);
 444                 glCompileShader(shader);
 445                 int error = print_error(complete_program, shader, 0);
 446                 glAttachShader(result, shader);
 447                 glDeleteShader(shader);
 448
 449                 glLinkProgram(result);
 450                 if(!error) error = print_error(complete_program, result, 1);
 451
 452
 453 // printf("BC_WindowBase::make_shader: shader=%d window_id=%d\n",
 454 // result,
 455 // BC_WindowBase::get_synchronous()->current_window->get_id());
 456                 BC_WindowBase::get_synchronous()->put_shader(result, complete_program);
 457         }
 458
 459 //printf("VFrame::make_shader\n%s\n", complete_program);
 460         free(complete_program);
 461         complete_program = NULL;
 462
 463 #endif
 464         return result;
 465 }
 466
 467 void VFrame::dump_shader(int shader_id)
 468 {
 469         BC_WindowBase::get_synchronous()->dump_shader(shader_id);
 470 }
 471
 472
 473 void VFrame::clear_pbuffer()
 474 {
 475 #ifdef HAVE_GL
 476         if(BC_CModels::is_yuv(get_color_model()))
 477                 glClearColor(0.0, 0.5, 0.5, 0.0);
 478         else
 479                 glClearColor(0.0, 0.0, 0.0, 0.0);
 480         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 481 #endif
 482 }
 483