git.sesse.net Git - vlc/blob - modules/video_output/opengl.c

   1 /*****************************************************************************
   2  * opengl.c: OpenGL and OpenGL ES output common code
   3  *****************************************************************************
   4  * Copyright (C) 2004-2011 VLC authors and VideoLAN
   5  * Copyright (C) 2009, 2011 Laurent Aimar
   6  *
   7  * Authors: Cyril Deguet <asmax@videolan.org>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *          Eric Petit <titer@m0k.org>
  10  *          Cedric Cocquebert <cedric.cocquebert@supelec.fr>
  11  *          Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  26  *****************************************************************************/
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_picture_pool.h>
  33 #include <vlc_subpicture.h>
  34 #include <vlc_opengl.h>
  35
  36 #include "opengl.h"
  37 // Define USE_OPENGL_ES to the GL ES Version you want to select
  38
  39 #ifdef __APPLE__
  40 # define PFNGLGENPROGRAMSARBPROC              typeof(glGenProgramsARB)*
  41 # define PFNGLBINDPROGRAMARBPROC              typeof(glBindProgramARB)*
  42 # define PFNGLPROGRAMSTRINGARBPROC            typeof(glProgramStringARB)*
  43 # define PFNGLDELETEPROGRAMSARBPROC           typeof(glDeleteProgramsARB)*
  44 # define PFNGLPROGRAMLOCALPARAMETER4FVARBPROC typeof(glProgramLocalParameter4fvARB)*
  45 # define PFNGLACTIVETEXTUREARBPROC            typeof(glActiveTextureARB)*
  46 # define PFNGLMULTITEXCOORD2FARBPROC          typeof(glMultiTexCoord2fARB)*
  47 #endif
  48
  49 /* RV16 */
  50 #ifndef GL_UNSIGNED_SHORT_5_6_5
  51 # define GL_UNSIGNED_SHORT_5_6_5 0x8363
  52 #endif
  53 #ifndef GL_CLAMP_TO_EDGE
  54 # define GL_CLAMP_TO_EDGE 0x812F
  55 #endif
  56
  57 #if USE_OPENGL_ES
  58 #   define VLCGL_TEXTURE_COUNT 1
  59 #   define VLCGL_PICTURE_MAX 1
  60 #else
  61 #   define VLCGL_TEXTURE_COUNT 1
  62 #   define VLCGL_PICTURE_MAX 128
  63 #endif
  64
  65 static const vlc_fourcc_t gl_subpicture_chromas[] = {
  66     VLC_CODEC_RGBA,
  67     0
  68 };
  69
  70 typedef struct {
  71     GLuint   texture;
  72     unsigned format;
  73     unsigned type;
  74     unsigned width;
  75     unsigned height;
  76
  77     float    alpha;
  78
  79     float    top;
  80     float    left;
  81     float    bottom;
  82     float    right;
  83 } gl_region_t;
  84
  85 struct vout_display_opengl_t {
  86     vlc_gl_t   *gl;
  87
  88     video_format_t fmt;
  89     const vlc_chroma_description_t *chroma;
  90
  91     int        tex_target;
  92     int        tex_format;
  93     int        tex_internal;
  94     int        tex_type;
  95
  96     int        tex_width[PICTURE_PLANE_MAX];
  97     int        tex_height[PICTURE_PLANE_MAX];
  98
  99     GLuint     texture[VLCGL_TEXTURE_COUNT][PICTURE_PLANE_MAX];
 100
 101     int         region_count;
 102     gl_region_t *region;
 103
 104
 105     picture_pool_t *pool;
 106
 107     GLuint     program;
 108     int        local_count;
 109     GLfloat    local_value[16][4];
 110
 111     /* fragment_program */
 112     PFNGLGENPROGRAMSARBPROC              GenProgramsARB;
 113     PFNGLBINDPROGRAMARBPROC              BindProgramARB;
 114     PFNGLPROGRAMSTRINGARBPROC            ProgramStringARB;
 115     PFNGLDELETEPROGRAMSARBPROC           DeleteProgramsARB;
 116     PFNGLPROGRAMLOCALPARAMETER4FVARBPROC ProgramLocalParameter4fvARB;
 117
 118     /* multitexture */
 119     bool use_multitexture;
 120     PFNGLACTIVETEXTUREARBPROC   ActiveTextureARB;
 121     PFNGLMULTITEXCOORD2FARBPROC MultiTexCoord2fARB;
 122 };
 123
 124 static inline int GetAlignedSize(unsigned size)
 125 {
 126     /* Return the smallest larger or equal power of 2 */
 127     unsigned align = 1 << (8 * sizeof (unsigned) - clz(size));
 128     return ((align >> 1) == size) ? size : align;
 129 }
 130
 131 static bool IsLuminance16Supported(int target)
 132 {
 133     GLuint texture;
 134
 135     glGenTextures(1, &texture);
 136     glBindTexture(target, texture);
 137     glTexImage2D(target, 0, GL_LUMINANCE16,
 138                  64, 64, 0, GL_LUMINANCE, GL_UNSIGNED_SHORT, NULL);
 139     GLint size = 0;
 140     glGetTexLevelParameteriv(target, 0, GL_TEXTURE_LUMINANCE_SIZE, &size);
 141
 142     glDeleteTextures(1, &texture);
 143
 144     return size == 16;
 145 }
 146
 147 vout_display_opengl_t *vout_display_opengl_New(video_format_t *fmt,
 148                                                const vlc_fourcc_t **subpicture_chromas,
 149                                                vlc_gl_t *gl)
 150 {
 151     vout_display_opengl_t *vgl = calloc(1, sizeof(*vgl));
 152     if (!vgl)
 153         return NULL;
 154
 155     vgl->gl = gl;
 156     if (vlc_gl_Lock(vgl->gl)) {
 157         free(vgl);
 158         return NULL;
 159     }
 160
 161     const char *extensions = (const char *)glGetString(GL_EXTENSIONS);
 162
 163     /* Load extensions */
 164     bool supports_fp = false;
 165     if (HasExtension(extensions, "GL_ARB_fragment_program")) {
 166 #if !defined(MACOS_OPENGL)
 167         vgl->GenProgramsARB    = (PFNGLGENPROGRAMSARBPROC)vlc_gl_GetProcAddress(vgl->gl, "glGenProgramsARB");
 168         vgl->BindProgramARB    = (PFNGLBINDPROGRAMARBPROC)vlc_gl_GetProcAddress(vgl->gl, "glBindProgramARB");
 169         vgl->ProgramStringARB  = (PFNGLPROGRAMSTRINGARBPROC)vlc_gl_GetProcAddress(vgl->gl, "glProgramStringARB");
 170         vgl->DeleteProgramsARB = (PFNGLDELETEPROGRAMSARBPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteProgramsARB");
 171         vgl->ProgramLocalParameter4fvARB = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC)vlc_gl_GetProcAddress(vgl->gl, "glProgramLocalParameter4fvARB");
 172 #else
 173         vgl->GenProgramsARB = glGenProgramsARB;
 174         vgl->BindProgramARB = glBindProgramARB;
 175         vgl->ProgramStringARB = glProgramStringARB;
 176         vgl->DeleteProgramsARB = glDeleteProgramsARB;
 177         vgl->ProgramLocalParameter4fvARB = glProgramLocalParameter4fvARB;
 178 #endif
 179         supports_fp = vgl->GenProgramsARB &&
 180                       vgl->BindProgramARB &&
 181                       vgl->ProgramStringARB &&
 182                       vgl->DeleteProgramsARB &&
 183                       vgl->ProgramLocalParameter4fvARB;
 184     }
 185
 186     bool supports_multitexture = false;
 187     GLint max_texture_units = 0;
 188     if (HasExtension(extensions, "GL_ARB_multitexture")) {
 189 #if !defined(MACOS_OPENGL)
 190         vgl->ActiveTextureARB   = (PFNGLACTIVETEXTUREARBPROC)vlc_gl_GetProcAddress(vgl->gl, "glActiveTextureARB");
 191         vgl->MultiTexCoord2fARB = (PFNGLMULTITEXCOORD2FARBPROC)vlc_gl_GetProcAddress(vgl->gl, "glMultiTexCoord2fARB");
 192 #else
 193         vgl->ActiveTextureARB = glActiveTextureARB;
 194         vgl->MultiTexCoord2fARB = glMultiTexCoord2fARB;
 195 #endif
 196         supports_multitexture = vgl->ActiveTextureARB &&
 197                                 vgl->MultiTexCoord2fARB;
 198         if (supports_multitexture)
 199             glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &max_texture_units);
 200     }
 201
 202     /* Initialize with default chroma */
 203     vgl->fmt = *fmt;
 204 #if USE_OPENGL_ES
 205     vgl->fmt.i_chroma = VLC_CODEC_RGB16;
 206 #   if defined(WORDS_BIGENDIAN)
 207     vgl->fmt.i_rmask  = 0x001f;
 208     vgl->fmt.i_gmask  = 0x07e0;
 209     vgl->fmt.i_bmask  = 0xf800;
 210 #   else
 211     vgl->fmt.i_rmask  = 0xf800;
 212     vgl->fmt.i_gmask  = 0x07e0;
 213     vgl->fmt.i_bmask  = 0x001f;
 214 #   endif
 215     vgl->tex_target   = GL_TEXTURE_2D;
 216     vgl->tex_format   = GL_RGB;
 217     vgl->tex_internal = GL_RGB;
 218     vgl->tex_type     = GL_UNSIGNED_SHORT_5_6_5;
 219 #else
 220     vgl->fmt.i_chroma = VLC_CODEC_RGB32;
 221 #   if defined(WORDS_BIGENDIAN)
 222     vgl->fmt.i_rmask  = 0xff000000;
 223     vgl->fmt.i_gmask  = 0x00ff0000;
 224     vgl->fmt.i_bmask  = 0x0000ff00;
 225 #   else
 226     vgl->fmt.i_rmask  = 0x000000ff;
 227     vgl->fmt.i_gmask  = 0x0000ff00;
 228     vgl->fmt.i_bmask  = 0x00ff0000;
 229 #   endif
 230     vgl->tex_target   = GL_TEXTURE_2D;
 231     vgl->tex_format   = GL_RGBA;
 232     vgl->tex_internal = GL_RGBA;
 233     vgl->tex_type     = GL_UNSIGNED_BYTE;
 234 #endif
 235     /* Use YUV if possible and needed */
 236     bool need_fs_yuv = false;
 237     float yuv_range_correction = 1.0;
 238     if (supports_fp && supports_multitexture && max_texture_units >= 3 &&
 239         vlc_fourcc_IsYUV(fmt->i_chroma) && !vlc_fourcc_IsYUV(vgl->fmt.i_chroma)) {
 240         const vlc_fourcc_t *list = vlc_fourcc_GetYUVFallback(fmt->i_chroma);
 241         while (*list) {
 242             const vlc_chroma_description_t *dsc = vlc_fourcc_GetChromaDescription(*list);
 243             if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 1) {
 244                 need_fs_yuv       = true;
 245                 vgl->fmt          = *fmt;
 246                 vgl->fmt.i_chroma = *list;
 247                 vgl->tex_format   = GL_LUMINANCE;
 248                 vgl->tex_internal = GL_LUMINANCE;
 249                 vgl->tex_type     = GL_UNSIGNED_BYTE;
 250                 yuv_range_correction = 1.0;
 251                 break;
 252             } else if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 2 &&
 253                        IsLuminance16Supported(vgl->tex_target)) {
 254                 need_fs_yuv       = true;
 255                 vgl->fmt          = *fmt;
 256                 vgl->fmt.i_chroma = *list;
 257                 vgl->tex_format   = GL_LUMINANCE;
 258                 vgl->tex_internal = GL_LUMINANCE16;
 259                 vgl->tex_type     = GL_UNSIGNED_SHORT;
 260                 yuv_range_correction = (float)((1 << 16) - 1) / ((1 << dsc->pixel_bits) - 1);
 261                 break;
 262             }
 263             list++;
 264         }
 265     }
 266
 267     vgl->chroma = vlc_fourcc_GetChromaDescription(vgl->fmt.i_chroma);
 268     vgl->use_multitexture = vgl->chroma->plane_count > 1;
 269
 270     bool supports_npot = false;
 271 #if USE_OPENGL_ES == 2
 272     supports_npot = true;
 273 #else
 274     supports_npot |= HasExtension(extensions, "GL_APPLE_texture_2D_limited_npot") ||
 275                      HasExtension(extensions, "GL_ARB_texture_non_power_of_two");
 276 #endif
 277
 278     /* Texture size */
 279     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 280         int w = vgl->fmt.i_width  * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den;
 281         int h = vgl->fmt.i_height * vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den;
 282         if (supports_npot) {
 283             vgl->tex_width[j]  = w;
 284             vgl->tex_height[j] = h;
 285         }
 286         else {
 287             /* A texture must have a size aligned on a power of 2 */
 288             vgl->tex_width[j]  = GetAlignedSize(w);
 289             vgl->tex_height[j] = GetAlignedSize(h);
 290         }
 291     }
 292
 293     /* Build fragment program if needed */
 294     vgl->program = 0;
 295     vgl->local_count = 0;
 296     if (supports_fp) {
 297         char *code = NULL;
 298
 299         if (need_fs_yuv) {
 300             /* [R/G/B][Y U V O] from TV range to full range
 301              * XXX we could also do hue/brightness/constrast/gamma
 302              * by simply changing the coefficients
 303              */
 304             const float matrix_bt601_tv2full[3][4] = {
 305                 { 1.1640,  0.0000,  1.4030, -0.7773 },
 306                 { 1.1640, -0.3440, -0.7140,  0.4580 },
 307                 { 1.1640,  1.7730,  0.0000, -0.9630 },
 308             };
 309             const float matrix_bt709_tv2full[3][4] = {
 310                 { 1.1640,  0.0000,  1.5701, -0.8612 },
 311                 { 1.1640, -0.1870, -0.4664,  0.2549 },
 312                 { 1.1640,  1.8556,  0.0000, -1.0045 },
 313             };
 314             const float (*matrix)[4] = fmt->i_height > 576 ? matrix_bt709_tv2full
 315                                                            : matrix_bt601_tv2full;
 316
 317             /* Basic linear YUV -> RGB conversion using bilinear interpolation */
 318             const char *template_yuv =
 319                 "!!ARBfp1.0"
 320                 "OPTION ARB_precision_hint_fastest;"
 321
 322                 "TEMP src;"
 323                 "TEX src.x,  fragment.texcoord[0], texture[0], 2D;"
 324                 "TEX src.%c, fragment.texcoord[1], texture[1], 2D;"
 325                 "TEX src.%c, fragment.texcoord[2], texture[2], 2D;"
 326
 327                 "PARAM coefficient[4] = { program.local[0..3] };"
 328
 329                 "TEMP tmp;"
 330                 "MAD  tmp.rgb,          src.xxxx, coefficient[0], coefficient[3];"
 331                 "MAD  tmp.rgb,          src.yyyy, coefficient[1], tmp;"
 332                 "MAD  result.color.rgb, src.zzzz, coefficient[2], tmp;"
 333                 "END";
 334             bool swap_uv = vgl->fmt.i_chroma == VLC_CODEC_YV12 ||
 335                            vgl->fmt.i_chroma == VLC_CODEC_YV9;
 336             if (asprintf(&code, template_yuv,
 337                          swap_uv ? 'z' : 'y',
 338                          swap_uv ? 'y' : 'z') < 0)
 339                 code = NULL;
 340
 341             for (int i = 0; i < 4; i++) {
 342                 float correction = i < 3 ? yuv_range_correction : 1.0;
 343                 for (int j = 0; j < 4; j++) {
 344                     vgl->local_value[vgl->local_count + i][j] = j < 3 ? correction * matrix[j][i] : 0.0;
 345                 }
 346             }
 347             vgl->local_count += 4;
 348         }
 349         if (code) {
 350         // Here you have shaders
 351             vgl->GenProgramsARB(1, &vgl->program);
 352             vgl->BindProgramARB(GL_FRAGMENT_PROGRAM_ARB, vgl->program);
 353             vgl->ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB,
 354                                   GL_PROGRAM_FORMAT_ASCII_ARB,
 355                                   strlen(code), (const GLbyte*)code);
 356             if (glGetError() == GL_INVALID_OPERATION) {
 357                 /* FIXME if the program was needed for YUV, the video will be broken */
 358 #if 0
 359                 GLint position;
 360                 glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &position);
 361
 362                 const char *msg = (const char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB);
 363                 fprintf(stderr, "GL_INVALID_OPERATION: error at %d: %s\n", position, msg);
 364 #endif
 365                 vgl->DeleteProgramsARB(1, &vgl->program);
 366                 vgl->program = 0;
 367             }
 368             free(code);
 369         }
 370     }
 371
 372     /* */
 373     glDisable(GL_BLEND);
 374     glDisable(GL_DEPTH_TEST);
 375     glDepthMask(GL_FALSE);
 376     glDisable(GL_CULL_FACE);
 377     glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 378     glClear(GL_COLOR_BUFFER_BIT);
 379
 380     vlc_gl_Unlock(vgl->gl);
 381
 382     /* */
 383     for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
 384         for (int j = 0; j < PICTURE_PLANE_MAX; j++)
 385             vgl->texture[i][j] = 0;
 386     }
 387     vgl->region_count = 0;
 388     vgl->region = NULL;
 389     vgl->pool = NULL;
 390
 391     *fmt = vgl->fmt;
 392     if (subpicture_chromas) {
 393         *subpicture_chromas = NULL;
 394 #if !USE_OPENGL_ES
 395         if (supports_npot)
 396             *subpicture_chromas = gl_subpicture_chromas;
 397 #endif
 398     }
 399     return vgl;
 400 }
 401
 402 void vout_display_opengl_Delete(vout_display_opengl_t *vgl)
 403 {
 404     /* */
 405     if (!vlc_gl_Lock(vgl->gl)) {
 406
 407         glFinish();
 408         glFlush();
 409         for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++)
 410             glDeleteTextures(vgl->chroma->plane_count, vgl->texture[i]);
 411         for (int i = 0; i < vgl->region_count; i++) {
 412             if (vgl->region[i].texture)
 413                 glDeleteTextures(1, &vgl->region[i].texture);
 414         }
 415         free(vgl->region);
 416
 417         if (vgl->program)
 418             vgl->DeleteProgramsARB(1, &vgl->program);
 419
 420         vlc_gl_Unlock(vgl->gl);
 421     }
 422     if (vgl->pool)
 423         picture_pool_Delete(vgl->pool);
 424     free(vgl);
 425 }
 426
 427 picture_pool_t *vout_display_opengl_GetPool(vout_display_opengl_t *vgl, unsigned requested_count)
 428 {
 429     if (vgl->pool)
 430         return vgl->pool;
 431
 432     /* Allocate our pictures */
 433     picture_t *picture[VLCGL_PICTURE_MAX] = {NULL, };
 434     unsigned count = 0;
 435
 436     for (count = 0; count < __MIN(VLCGL_PICTURE_MAX, requested_count); count++) {
 437         picture[count] = picture_NewFromFormat(&vgl->fmt);
 438         if (!picture[count])
 439             break;
 440     }
 441     if (count <= 0)
 442         return NULL;
 443
 444     /* Wrap the pictures into a pool */
 445     picture_pool_configuration_t cfg;
 446     memset(&cfg, 0, sizeof(cfg));
 447     cfg.picture_count = count;
 448     cfg.picture       = picture;
 449     vgl->pool = picture_pool_NewExtended(&cfg);
 450     if (!vgl->pool)
 451         goto error;
 452
 453     /* Allocates our textures */
 454     if (vlc_gl_Lock(vgl->gl))
 455         return vgl->pool;
 456
 457     for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
 458         glGenTextures(vgl->chroma->plane_count, vgl->texture[i]);
 459         for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 460             if (vgl->use_multitexture)
 461                 vgl->ActiveTextureARB(GL_TEXTURE0_ARB + j);
 462             glBindTexture(vgl->tex_target, vgl->texture[i][j]);
 463
 464 #if !USE_OPENGL_ES
 465             /* Set the texture parameters */
 466             glTexParameterf(vgl->tex_target, GL_TEXTURE_PRIORITY, 1.0);
 467             glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 468 #endif
 469
 470             glTexParameteri(vgl->tex_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 471             glTexParameteri(vgl->tex_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 472             glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 473             glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 474
 475             /* Call glTexImage2D only once, and use glTexSubImage2D later */
 476             glTexImage2D(vgl->tex_target, 0,
 477                          vgl->tex_internal, vgl->tex_width[j], vgl->tex_height[j],
 478                          0, vgl->tex_format, vgl->tex_type, NULL);
 479         }
 480     }
 481
 482     vlc_gl_Unlock(vgl->gl);
 483
 484     return vgl->pool;
 485
 486 error:
 487     for (unsigned i = 0; i < count; i++)
 488         picture_Delete(picture[i]);
 489     return NULL;
 490 }
 491
 492 int vout_display_opengl_Prepare(vout_display_opengl_t *vgl,
 493                                 picture_t *picture, subpicture_t *subpicture)
 494 {
 495     /* On Win32/GLX, we do this the usual way:
 496        + Fill the buffer with new content,
 497        + Reload the texture,
 498        + Use the texture.
 499
 500        On OS X with VRAM or AGP texturing, the order has to be:
 501        + Reload the texture,
 502        + Fill the buffer with new content,
 503        + Use the texture.
 504
 505        (Thanks to gcc from the Arstechnica forums for the tip)
 506
 507        Therefore on OSX, we have to use two buffers and textures and use a
 508        lock(/unlock) managed picture pool.
 509      */
 510
 511     if (vlc_gl_Lock(vgl->gl))
 512         return VLC_EGENERIC;
 513
 514     /* Update the texture */
 515     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 516         const int plane = vgl->fmt.i_chroma == VLC_CODEC_YV12 && j > 0 ?  (3 - j) : j;
 517         if (vgl->use_multitexture)
 518             vgl->ActiveTextureARB(GL_TEXTURE0_ARB + j);
 519         glBindTexture(vgl->tex_target, vgl->texture[0][j]);
 520         glPixelStorei(GL_UNPACK_ROW_LENGTH, picture->p[plane].i_pitch / picture->p[plane].i_pixel_pitch);
 521         glTexSubImage2D(vgl->tex_target, 0,
 522                         0, 0,
 523                         vgl->fmt.i_width  * vgl->chroma->p[plane].w.num / vgl->chroma->p[plane].w.den,
 524                         vgl->fmt.i_height * vgl->chroma->p[plane].h.num / vgl->chroma->p[plane].h.den,
 525                         vgl->tex_format, vgl->tex_type, picture->p[plane].p_pixels);
 526     }
 527
 528     int         last_count = vgl->region_count;
 529     gl_region_t *last = vgl->region;
 530
 531     vgl->region_count = 0;
 532     vgl->region       = NULL;
 533
 534     if (subpicture) {
 535
 536         int count = 0;
 537         for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next)
 538             count++;
 539
 540         vgl->region_count = count;
 541         vgl->region       = calloc(count, sizeof(*vgl->region));
 542
 543         if (vgl->use_multitexture)
 544             vgl->ActiveTextureARB(GL_TEXTURE0_ARB + 0);
 545         int i = 0;
 546         for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next, i++) {
 547             gl_region_t *glr = &vgl->region[i];
 548
 549             glr->format = GL_RGBA;
 550             glr->type   = GL_UNSIGNED_BYTE;
 551             glr->width  = r->fmt.i_visible_width;
 552             glr->height = r->fmt.i_visible_height;
 553             glr->alpha  = (float)subpicture->i_alpha * r->i_alpha / 255 / 255;
 554             glr->left   =  2.0 * (r->i_x                          ) / subpicture->i_original_picture_width  - 1.0;
 555             glr->top    = -2.0 * (r->i_y                          ) / subpicture->i_original_picture_height + 1.0;
 556             glr->right  =  2.0 * (r->i_x + r->fmt.i_visible_width ) / subpicture->i_original_picture_width  - 1.0;
 557             glr->bottom = -2.0 * (r->i_y + r->fmt.i_visible_height) / subpicture->i_original_picture_height + 1.0;
 558
 559             glr->texture = 0;
 560             for (int j = 0; j < last_count; j++) {
 561                 if (last[j].texture &&
 562                     last[j].width  == glr->width &&
 563                     last[j].height == glr->height &&
 564                     last[j].format == glr->format &&
 565                     last[j].type   == glr->type) {
 566                     glr->texture = last[j].texture;
 567                     memset(&last[j], 0, sizeof(last[j]));
 568                     break;
 569                 }
 570             }
 571
 572             if (glr->texture) {
 573                 glBindTexture(GL_TEXTURE_2D, glr->texture);
 574                 /* TODO set GL_UNPACK_ALIGNMENT */
 575                 glPixelStorei(GL_UNPACK_ROW_LENGTH, r->p_picture->p->i_pitch / r->p_picture->p->i_pixel_pitch);
 576                 glTexSubImage2D(GL_TEXTURE_2D, 0,
 577                                 0, 0, glr->width, glr->height,
 578                                 glr->format, glr->type, r->p_picture->p->p_pixels);
 579             } else {
 580                 glGenTextures(1, &glr->texture);
 581                 glBindTexture(GL_TEXTURE_2D, glr->texture);
 582                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_PRIORITY, 1.0);
 583                 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 584                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 585                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 586                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 587                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 588                 /* TODO set GL_UNPACK_ALIGNMENT */
 589                 glPixelStorei(GL_UNPACK_ROW_LENGTH, r->p_picture->p->i_pitch / r->p_picture->p->i_pixel_pitch);
 590                 glTexImage2D(GL_TEXTURE_2D, 0, glr->format,
 591                              glr->width, glr->height, 0, glr->format, glr->type,
 592                              r->p_picture->p->p_pixels);
 593             }
 594         }
 595     }
 596     for (int i = 0; i < last_count; i++) {
 597         if (last[i].texture)
 598             glDeleteTextures(1, &last[i].texture);
 599     }
 600     free(last);
 601
 602     vlc_gl_Unlock(vgl->gl);
 603     VLC_UNUSED(subpicture);
 604     return VLC_SUCCESS;
 605 }
 606
 607 int vout_display_opengl_Display(vout_display_opengl_t *vgl,
 608                                 const video_format_t *source)
 609 {
 610     if (vlc_gl_Lock(vgl->gl))
 611         return VLC_EGENERIC;
 612
 613     /* glTexCoord works differently with GL_TEXTURE_2D and
 614        GL_TEXTURE_RECTANGLE_EXT */
 615     float left[PICTURE_PLANE_MAX];
 616     float top[PICTURE_PLANE_MAX];
 617     float right[PICTURE_PLANE_MAX];
 618     float bottom[PICTURE_PLANE_MAX];
 619     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 620         float scale_w, scale_h;
 621         if (vgl->tex_target == GL_TEXTURE_2D) {
 622             scale_w = (float)vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den / vgl->tex_width[j];
 623             scale_h = (float)vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den / vgl->tex_height[j];
 624
 625         } else {
 626             scale_w = 1.0;
 627             scale_h = 1.0;
 628         }
 629         left[j]   = (source->i_x_offset +                       0 ) * scale_w;
 630         top[j]    = (source->i_y_offset +                       0 ) * scale_h;
 631         right[j]  = (source->i_x_offset + source->i_visible_width ) * scale_w;
 632         bottom[j] = (source->i_y_offset + source->i_visible_height) * scale_h;
 633     }
 634
 635
 636     /* Why drawing here and not in Render()? Because this way, the
 637        OpenGL providers can call vout_display_opengl_Display to force redraw.i
 638        Currently, the OS X provider uses it to get a smooth window resizing */
 639
 640     glClear(GL_COLOR_BUFFER_BIT);
 641
 642     if (vgl->program) {
 643         glEnable(GL_FRAGMENT_PROGRAM_ARB);
 644         for (int i = 0; i < vgl->local_count; i++)
 645             vgl->ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, i, vgl->local_value[i]);
 646     } else {
 647         glEnable(vgl->tex_target);
 648     }
 649
 650 #if USE_OPENGL_ES
 651     static const GLfloat vertexCoord[] = {
 652         -1.0f, -1.0f,
 653          1.0f, -1.0f,
 654         -1.0f,  1.0f,
 655          1.0f,  1.0f,
 656     };
 657
 658     const GLfloat textureCoord[8] = {
 659         left[0],  bottom[0],
 660         right[0], bottom[0],
 661         left[0],  top[0],
 662         right[0], top[0]
 663     };
 664
 665     glEnableClientState(GL_VERTEX_ARRAY);
 666     glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 667     glVertexPointer(2, GL_FLOAT, 0, vertexCoord);
 668     glTexCoordPointer(2, GL_FLOAT, 0, textureCoord);
 669
 670     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 671 #else
 672     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 673         if (vgl->use_multitexture)
 674             vgl->ActiveTextureARB(GL_TEXTURE0_ARB + j);
 675         glBindTexture(vgl->tex_target, vgl->texture[0][j]);
 676     }
 677     glBegin(GL_POLYGON);
 678
 679     glTexCoord2f(left[0],  top[0]);
 680     for (unsigned j = 1; j < vgl->chroma->plane_count; j++)
 681         vgl->MultiTexCoord2fARB(GL_TEXTURE0_ARB + j, left[j], top[j]);
 682     glVertex2f(-1.0,  1.0);
 683
 684     glTexCoord2f(right[0], top[0]);
 685     for (unsigned j = 1; j < vgl->chroma->plane_count; j++)
 686         vgl->MultiTexCoord2fARB(GL_TEXTURE0_ARB + j, right[j], top[j]);
 687     glVertex2f( 1.0,  1.0);
 688
 689     glTexCoord2f(right[0], bottom[0]);
 690     for (unsigned j = 1; j < vgl->chroma->plane_count; j++)
 691         vgl->MultiTexCoord2fARB(GL_TEXTURE0_ARB + j, right[j], bottom[j]);
 692     glVertex2f( 1.0, -1.0);
 693
 694     glTexCoord2f(left[0],  bottom[0]);
 695     for (unsigned j = 1; j < vgl->chroma->plane_count; j++)
 696         vgl->MultiTexCoord2fARB(GL_TEXTURE0_ARB + j, left[j], bottom[j]);
 697     glVertex2f(-1.0, -1.0);
 698
 699     glEnd();
 700 #endif
 701
 702     if (vgl->program)
 703         glDisable(GL_FRAGMENT_PROGRAM_ARB);
 704     else
 705         glDisable(vgl->tex_target);
 706
 707 #if !USE_OPENGL_ES
 708     if (vgl->use_multitexture)
 709         vgl->ActiveTextureARB(GL_TEXTURE0_ARB + 0);
 710     glEnable(GL_TEXTURE_2D);
 711     glEnable(GL_BLEND);
 712     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 713     for (int i = 0; i < vgl->region_count; i++) {
 714         gl_region_t *glr = &vgl->region[i];
 715
 716         glBindTexture(GL_TEXTURE_2D, glr->texture);
 717
 718         glBegin(GL_POLYGON);
 719
 720         glColor4f(1.0, 1.0, 1.0, glr->alpha);
 721
 722         glTexCoord2f(0.0, 0.0);
 723         glVertex2f(glr->left, glr->top);
 724
 725         glTexCoord2f(1.0, 0.0);
 726         glVertex2f(glr->right, glr->top);
 727
 728         glTexCoord2f(1.0, 1.0);
 729         glVertex2f(glr->right, glr->bottom);
 730
 731         glTexCoord2f(0.0, 1.0);
 732         glVertex2f(glr->left, glr->bottom);
 733
 734         glEnd();
 735     }
 736     glDisable(GL_BLEND);
 737     glDisable(GL_TEXTURE_2D);
 738 #endif
 739
 740     vlc_gl_Swap(vgl->gl);
 741
 742     vlc_gl_Unlock(vgl->gl);
 743     return VLC_SUCCESS;
 744 }
 745