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) 2004-2012 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  *          Ilkka Ollakka <ileoo@videolan.org>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  27  *****************************************************************************/
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_picture_pool.h>
  34 #include <vlc_subpicture.h>
  35 #include <vlc_opengl.h>
  36
  37 #include "opengl.h"
  38
  39 #ifndef GL_CLAMP_TO_EDGE
  40 # define GL_CLAMP_TO_EDGE 0x812F
  41 #endif
  42
  43 #ifdef __APPLE__
  44 #   define PFNGLGENBUFFERSPROC               typeof(glGenBuffers)*
  45 #   define PFNGLBINDBUFFERPROC               typeof(glBindBuffer)*
  46 #   define PFNGLDELETEBUFFERSPROC            typeof(glDeleteBuffers)*
  47 #   define PFNGLBUFFERSUBDATAPROC            typeof(glBufferSubData)*
  48 #   define PFNGLBUFFERDATAPROC               typeof(glBufferData)*
  49 #   define PFNGLGETPROGRAMIVPROC             typeof(glGetProgramiv)*
  50 #   define PFNGLGETPROGRAMINFOLOGPROC        typeof(glGetProgramInfoLog)*
  51 #   define PFNGLGETSHADERIVPROC              typeof(glGetShaderiv)*
  52 #   define PFNGLGETSHADERINFOLOGPROC         typeof(glGetShaderInfoLog)*
  53 #   define PFNGLGETUNIFORMLOCATIONPROC       typeof(glGetUniformLocation)*
  54 #   define PFNGLGETATTRIBLOCATIONPROC        typeof(glGetAttribLocation)*
  55 #   define PFNGLVERTEXATTRIBLOCATIONPROC     typeof(glVertexAttribPointer)*
  56 #   define PFNGLENABLEVERTEXATTRIBARRAYPROC  typeof(glEnableVertexAttribArray)*
  57 #   define PFNGLUNIFORM4FVPROC               typeof(glUniform4fv)*
  58 #   define PFNGLUNIFORM4FPROC                typeof(glUniform4f)*
  59 #   define PFNGLUNIFORM3IPROC                typeof(glUniform3i)*
  60 #   define PFNGLUNIFORM1IPROC                typeof(glUniform1i)*
  61 #   define PFNGLCREATESHADERPROC             typeof(glCreateShader)*
  62 #   define PFNGLSHADERSOURCEPROC             typeof(glShaderSource)*
  63 #   define PFNGLCOMPILESHADERPROC            typeof(glCompileShader)*
  64 #   define PFNGLDETACHSHADERPROC             typeof(glDetachShader)*
  65 #   define PFNGLDELETESHADERPROC             typeof(glDeleteShader)*
  66 #   define PFNGLCREATEPROGRAMPROC            typeof(glCreateProgram)*
  67 #   define PFNGLLINKPROGRAMPROC              typeof(glLinkProgram)*
  68 #   define PFNGLUSEPROGRAMPROC               typeof(glUseProgram)*
  69 #   define PFNGLDELETEPROGRAMPROC            typeof(glDeleteProgram)*
  70 #   define PFNGLATTACHSHADERPROC             typeof(glAttachShader)*
  71 #   define PFNGLACTIVETEXTUREPROC            typeof(glActiveTexture)*
  72 #   define PFNGLCLIENTACTIVETEXTUREPROC      typeof(glClientActiveTexture)*
  73 #if USE_OPENGL_ES
  74 #   define GL_UNPACK_ROW_LENGTH 0
  75 #   import <CoreFoundation/CoreFoundation.h>
  76 #endif
  77 #endif
  78
  79 #if USE_OPENGL_ES
  80 #   define VLCGL_TEXTURE_COUNT 1
  81 #   define VLCGL_PICTURE_MAX 1
  82 #else
  83 #   define VLCGL_TEXTURE_COUNT 1
  84 #   define VLCGL_PICTURE_MAX 128
  85 #endif
  86
  87 static const vlc_fourcc_t gl_subpicture_chromas[] = {
  88     VLC_CODEC_RGBA,
  89     0
  90 };
  91
  92 typedef struct {
  93     GLuint   texture;
  94     unsigned format;
  95     unsigned type;
  96     unsigned width;
  97     unsigned height;
  98
  99     float    alpha;
 100
 101     float    top;
 102     float    left;
 103     float    bottom;
 104     float    right;
 105 } gl_region_t;
 106
 107 struct vout_display_opengl_t {
 108
 109     vlc_gl_t   *gl;
 110
 111     video_format_t fmt;
 112     const vlc_chroma_description_t *chroma;
 113
 114     int        tex_target;
 115     int        tex_format;
 116     int        tex_internal;
 117     int        tex_type;
 118
 119     int        tex_width[PICTURE_PLANE_MAX];
 120     int        tex_height[PICTURE_PLANE_MAX];
 121
 122     GLuint     texture[VLCGL_TEXTURE_COUNT][PICTURE_PLANE_MAX];
 123
 124     int         region_count;
 125     gl_region_t *region;
 126
 127
 128     picture_pool_t *pool;
 129
 130     /* index 0 for normal and 1 for subtitle overlay */
 131     GLuint     program[2];
 132     GLint      shader[3]; //3. is for the common vertex shader
 133     int        local_count;
 134     GLfloat    local_value[16];
 135
 136     /* Buffer commands */
 137     PFNGLGENBUFFERSPROC   GenBuffers;
 138     PFNGLBINDBUFFERPROC   BindBuffer;
 139     PFNGLDELETEBUFFERSPROC DeleteBuffers;
 140     PFNGLBUFFERSUBDATAPROC BufferSubData;
 141
 142     PFNGLBUFFERDATAPROC   BufferData;
 143
 144     /* Shader variables commands*/
 145
 146     PFNGLGETUNIFORMLOCATIONPROC      GetUniformLocation;
 147     PFNGLGETATTRIBLOCATIONPROC       GetAttribLocation;
 148     PFNGLVERTEXATTRIBPOINTERPROC     VertexAttribPointer;
 149     PFNGLENABLEVERTEXATTRIBARRAYPROC EnableVertexAttribArray;
 150
 151     PFNGLUNIFORM4FVPROC   Uniform4fv;
 152     PFNGLUNIFORM4FPROC    Uniform4f;
 153     PFNGLUNIFORM3IPROC    Uniform3i;
 154     PFNGLUNIFORM1IPROC    Uniform1i;
 155
 156     /* Shader command */
 157     PFNGLCREATESHADERPROC CreateShader;
 158     PFNGLSHADERSOURCEPROC ShaderSource;
 159     PFNGLCOMPILESHADERPROC CompileShader;
 160     PFNGLDETACHSHADERPROC   DetachShader;
 161     PFNGLDELETESHADERPROC   DeleteShader;
 162
 163     PFNGLCREATEPROGRAMPROC CreateProgram;
 164     PFNGLLINKPROGRAMPROC   LinkProgram;
 165     PFNGLUSEPROGRAMPROC    UseProgram;
 166     PFNGLDELETEPROGRAMPROC DeleteProgram;
 167
 168     PFNGLATTACHSHADERPROC  AttachShader;
 169
 170     /* Shader log commands */
 171     PFNGLGETPROGRAMIVPROC  GetProgramiv;
 172     PFNGLGETPROGRAMINFOLOGPROC GetProgramInfoLog;
 173     PFNGLGETSHADERIVPROC   GetShaderiv;
 174     PFNGLGETSHADERINFOLOGPROC GetShaderInfoLog;
 175
 176
 177     /* multitexture */
 178     PFNGLACTIVETEXTUREPROC  ActiveTexture;
 179     PFNGLCLIENTACTIVETEXTUREPROC  ClientActiveTexture;
 180     bool use_multitexture;
 181
 182     /* Non-power-of-2 texture size support */
 183     bool supports_npot;
 184 };
 185
 186 static inline int GetAlignedSize(unsigned size)
 187 {
 188     /* Return the smallest larger or equal power of 2 */
 189     unsigned align = 1 << (8 * sizeof (unsigned) - clz(size));
 190     return ((align >> 1) == size) ? size : align;
 191 }
 192
 193 #if !USE_OPENGL_ES
 194 static bool IsLuminance16Supported(int target)
 195 {
 196 #if defined(MACOS_OPENGL)
 197     /* OpenGL 1.x on OS X does _not_ support 16bit shaders, but pretends to.
 198      * That's why we enforce return false here, even though the actual code below
 199      * would return true.
 200      * This fixes playback of 10bit content on the Intel GMA 950 chipset, which is
 201      * the only "GPU" supported by 10.6 and 10.7 with just an OpenGL 1.4 driver.
 202      *
 203      * Presumely, this also improves playback on the GMA 3100, GeForce FX 5200,
 204      * GeForce4 Ti, GeForce3, GeForce2 MX/4 MX and the Radeon 8500 when
 205      * running OS X 10.5. */
 206     const GLubyte * p_glversion;
 207     float f_glversion;
 208     p_glversion = glGetString (GL_VERSION);
 209     sscanf((char *)p_glversion, "%f", &f_glversion);
 210     if (f_glversion < 2)
 211         return false;
 212 #endif
 213
 214     GLuint texture;
 215
 216     glGenTextures(1, &texture);
 217     glBindTexture(target, texture);
 218     glTexImage2D(target, 0, GL_LUMINANCE16,
 219                  64, 64, 0, GL_LUMINANCE, GL_UNSIGNED_SHORT, NULL);
 220     GLint size = 0;
 221     glGetTexLevelParameteriv(target, 0, GL_TEXTURE_LUMINANCE_SIZE, &size);
 222
 223     glDeleteTextures(1, &texture);
 224
 225     return size == 16;
 226 }
 227 #endif
 228
 229 vout_display_opengl_t *vout_display_opengl_New(video_format_t *fmt,
 230                                                const vlc_fourcc_t **subpicture_chromas,
 231                                                vlc_gl_t *gl)
 232 {
 233     vout_display_opengl_t *vgl = calloc(1, sizeof(*vgl));
 234     if (!vgl)
 235         return NULL;
 236
 237     vgl->gl = gl;
 238     if (vlc_gl_Lock(vgl->gl)) {
 239         free(vgl);
 240         return NULL;
 241     }
 242
 243     if( vgl->gl->getProcAddress == NULL )
 244     {
 245         fprintf(stderr, "getProcAddress not implemented, bailing out\n");
 246         free( vgl );
 247         return NULL;
 248     }
 249
 250     const char *extensions = (const char *)glGetString(GL_EXTENSIONS);
 251 #if !USE_OPENGL_ES
 252     const unsigned char *ogl_version = glGetString(GL_VERSION);
 253     bool supports_shaders = strverscmp((const char *)ogl_version, "2.0") >= 0;
 254 #else
 255     bool supports_shaders = false;
 256 #ifdef __APPLE__
 257     if( kCFCoreFoundationVersionNumber >= 786. )
 258          supports_shaders = true;
 259 #endif
 260 #endif
 261
 262     GLint max_texture_units = 0;
 263     glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_texture_units);
 264
 265     /* Initialize with default chroma */
 266     vgl->fmt = *fmt;
 267     vgl->fmt.i_chroma = VLC_CODEC_RGB32;
 268 #   if defined(WORDS_BIGENDIAN)
 269     vgl->fmt.i_rmask  = 0xff000000;
 270     vgl->fmt.i_gmask  = 0x00ff0000;
 271     vgl->fmt.i_bmask  = 0x0000ff00;
 272 #   else
 273     vgl->fmt.i_rmask  = 0x000000ff;
 274     vgl->fmt.i_gmask  = 0x0000ff00;
 275     vgl->fmt.i_bmask  = 0x00ff0000;
 276 #   endif
 277     vgl->tex_target   = GL_TEXTURE_2D;
 278     vgl->tex_format   = GL_RGBA;
 279     vgl->tex_internal = GL_RGBA;
 280     vgl->tex_type     = GL_UNSIGNED_BYTE;
 281     /* Use YUV if possible and needed */
 282     bool need_fs_yuv = false;
 283     float yuv_range_correction = 1.0;
 284     if ( max_texture_units >= 3 && supports_shaders &&
 285         vlc_fourcc_IsYUV(fmt->i_chroma) && !vlc_fourcc_IsYUV(vgl->fmt.i_chroma)) {
 286         const vlc_fourcc_t *list = vlc_fourcc_GetYUVFallback(fmt->i_chroma);
 287         while (*list) {
 288             const vlc_chroma_description_t *dsc = vlc_fourcc_GetChromaDescription(*list);
 289             if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 1) {
 290                 need_fs_yuv       = true;
 291                 vgl->fmt          = *fmt;
 292                 vgl->fmt.i_chroma = *list;
 293                 vgl->tex_format   = GL_LUMINANCE;
 294                 vgl->tex_internal = GL_LUMINANCE;
 295                 vgl->tex_type     = GL_UNSIGNED_BYTE;
 296                 yuv_range_correction = 1.0;
 297                 break;
 298 #if !USE_OPENGL_ES
 299             } else if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 2 &&
 300                        IsLuminance16Supported(vgl->tex_target)) {
 301                 need_fs_yuv       = true;
 302                 vgl->fmt          = *fmt;
 303                 vgl->fmt.i_chroma = *list;
 304                 vgl->tex_format   = GL_LUMINANCE;
 305                 vgl->tex_internal = GL_LUMINANCE16;
 306                 vgl->tex_type     = GL_UNSIGNED_SHORT;
 307                 yuv_range_correction = (float)((1 << 16) - 1) / ((1 << dsc->pixel_bits) - 1);
 308                 break;
 309 #endif
 310             }
 311             list++;
 312         }
 313     }
 314 #if (defined (__ppc__) || defined (__ppc64__) || defined (__powerpc__)) && defined (__APPLE__)
 315     /* This is a work-around for dated PowerPC-based Macs, which run OpenGL 1.3 only and don't
 316      * support the GL_ARB_fragment_program extension.
 317      * Affected devices are all Macs built between 2002 and 2005 with an ATI Radeon 7500,
 318      * an ATI Radeon 9200 or a NVIDIA GeForceFX 5200 Ultra. */
 319     else
 320     {
 321         vgl->tex_format   = GL_YCBCR_422_APPLE;
 322         vgl->tex_type     = GL_UNSIGNED_SHORT_8_8_APPLE;
 323         vgl->fmt.i_chroma = VLC_CODEC_YUYV;
 324     }
 325 #endif
 326
 327     vgl->GenBuffers    = (PFNGLGENBUFFERSPROC)vlc_gl_GetProcAddress(vgl->gl, "glGenBuffers");
 328     vgl->BindBuffer    = (PFNGLBINDBUFFERPROC)vlc_gl_GetProcAddress(vgl->gl, "glBindBuffer");
 329     vgl->BufferData    = (PFNGLBUFFERDATAPROC)vlc_gl_GetProcAddress(vgl->gl, "glBufferData");
 330     vgl->BufferSubData = (PFNGLBUFFERSUBDATAPROC)vlc_gl_GetProcAddress(vgl->gl, "glBufferSubData");
 331     vgl->DeleteBuffers = (PFNGLDELETEBUFFERSPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteBuffers");
 332
 333     vgl->CreateShader  = (PFNGLCREATESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glCreateShader");
 334     vgl->ShaderSource  = (PFNGLSHADERSOURCEPROC)vlc_gl_GetProcAddress(vgl->gl, "glShaderSource");
 335     vgl->CompileShader = (PFNGLCOMPILESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glCompileShader");
 336     vgl->AttachShader  = (PFNGLATTACHSHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glAttachShader");
 337
 338     vgl->GetProgramiv  = (PFNGLGETPROGRAMIVPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetProgramiv");
 339     vgl->GetShaderiv   = (PFNGLGETSHADERIVPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetShaderiv");
 340     vgl->GetProgramInfoLog  = (PFNGLGETPROGRAMINFOLOGPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetProgramInfoLog");
 341     vgl->GetShaderInfoLog   = (PFNGLGETSHADERINFOLOGPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetShaderInfoLog");
 342
 343     vgl->DetachShader  = (PFNGLDETACHSHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glDetachShader");
 344     vgl->DeleteShader  = (PFNGLDELETESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteShader");
 345
 346     vgl->GetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetUniformLocation");
 347     vgl->GetAttribLocation  = (PFNGLGETATTRIBLOCATIONPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetAttribLocation");
 348     vgl->VertexAttribPointer= (PFNGLVERTEXATTRIBPOINTERPROC)vlc_gl_GetProcAddress(vgl->gl, "glVertexAttribPointer");
 349     vgl->EnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)vlc_gl_GetProcAddress(vgl->gl, "glEnableVertexAttribArray");
 350     vgl->Uniform4fv    = (PFNGLUNIFORM4FVPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform4fv");
 351     vgl->Uniform4f     = (PFNGLUNIFORM4FPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform4f");
 352     vgl->Uniform3i     = (PFNGLUNIFORM3IPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform3i");
 353     vgl->Uniform1i     = (PFNGLUNIFORM1IPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform1i");
 354
 355     vgl->CreateProgram = (PFNGLCREATEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glCreateProgram");
 356     vgl->LinkProgram   = (PFNGLLINKPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glLinkProgram");
 357     vgl->UseProgram    = (PFNGLUSEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glUseProgram");
 358     vgl->DeleteProgram = (PFNGLDELETEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteProgram");
 359     vgl->ActiveTexture = (PFNGLACTIVETEXTUREPROC)vlc_gl_GetProcAddress(vgl->gl, "glActiveTexture");
 360     vgl->ClientActiveTexture = (PFNGLCLIENTACTIVETEXTUREPROC)vlc_gl_GetProcAddress(vgl->gl, "glClientActiveTexture");
 361
 362     vgl->chroma = vlc_fourcc_GetChromaDescription(vgl->fmt.i_chroma);
 363     vgl->use_multitexture = vgl->chroma->plane_count > 1;
 364     vgl->supports_npot = HasExtension( extensions, "GL_ARB_texture_non_power_of_two" ) ||
 365                          HasExtension( extensions, "GL_APPLE_texture_2D_limited_npot" );
 366
 367     if( !vgl->CreateShader || !vgl->ShaderSource || !vgl->CreateProgram )
 368     {
 369         fprintf(stderr, "Looks like you don't have all the opengl we need. Driver is %s, giving up\n", glGetString(GL_VERSION));
 370         free( vgl );
 371         return NULL;
 372     }
 373
 374
 375     /* Texture size */
 376     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 377         int w = vgl->fmt.i_width  * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den;
 378         int h = vgl->fmt.i_height * vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den;
 379         if( vgl->supports_npot )
 380         {
 381             vgl->tex_width[j]  = w;
 382             vgl->tex_height[j] = h;
 383         } else {
 384             vgl->tex_width[j]  = GetAlignedSize(w);
 385             vgl->tex_height[j] = GetAlignedSize(h);
 386         }
 387     }
 388
 389     /* Build fragment program if needed */
 390     vgl->program[0] = 0;
 391     vgl->program[1] = 0;
 392     vgl->local_count = 0;
 393     vgl->shader[0] = vgl->shader[1] = vgl->shader[2] = -1;
 394     if (supports_shaders) {
 395         char *code = NULL;
 396
 397             /* [R/G/B][Y U V O] from TV range to full range
 398              * XXX we could also do hue/brightness/constrast/gamma
 399              * by simply changing the coefficients
 400              */
 401             const float matrix_bt601_tv2full[12] = {
 402                  1.164383561643836,  0.0000,             1.596026785714286, -0.874202217873451 ,
 403                  1.164383561643836, -0.391762290094914, -0.812967647237771,  0.531667823499146 ,
 404                  1.164383561643836,  2.017232142857142,  0.0000,            -1.085630789302022 ,
 405             };
 406             const float matrix_bt709_tv2full[12] = {
 407                  1.164383561643836,  0.0000,             1.792741071428571, -0.972945075016308 ,
 408                  1.164383561643836, -0.21324861427373,  -0.532909328559444,  0.301482665475862 ,
 409                  1.164383561643836,  2.112401785714286,  0.0000,            -1.133402217873451 ,
 410             };
 411             const float (*matrix) = fmt->i_height > 576 ? matrix_bt709_tv2full
 412                                                            : matrix_bt601_tv2full;
 413
 414             /* Basic linear YUV -> RGB conversion using bilinear interpolation */
 415             const char *template_glsl_yuv =
 416                 "#version 120\n"
 417                 "uniform sampler2D Texture[3];"
 418                 "uniform vec4      coefficient[4];"
 419                 "varying vec4      TexCoord0,TexCoord1,TexCoord2;"
 420
 421                 "void main(void) {"
 422                 " vec4 x,y,z,result;"
 423                 " x  = texture2D(Texture[0], TexCoord0.st);"
 424                 " %c = texture2D(Texture[1], TexCoord1.st);"
 425                 " %c = texture2D(Texture[2], TexCoord2.st);"
 426
 427                 " result = x * coefficient[0] + coefficient[3];"
 428                 " result = (y * coefficient[1]) + result;"
 429                 " result = (z * coefficient[2]) + result;"
 430                 " gl_FragColor = result;"
 431                 "}";
 432             bool swap_uv = vgl->fmt.i_chroma == VLC_CODEC_YV12 ||
 433                            vgl->fmt.i_chroma == VLC_CODEC_YV9;
 434             if (asprintf(&code, template_glsl_yuv,
 435                          swap_uv ? 'z' : 'y',
 436                          swap_uv ? 'y' : 'z') < 0)
 437                 code = NULL;
 438
 439             for (int i = 0; i < 4; i++) {
 440                 float correction = i < 3 ? yuv_range_correction : 1.0;
 441                 /* We place coefficient values for coefficient[4] in one array from matrix values.
 442                    Notice that we fill values from top down instead of left to right.*/
 443                 for( int j = 0; j < 4; j++ )
 444                     vgl->local_value[vgl->local_count + i*4+j] = j < 3 ? correction * matrix[j*4+i] : 0.0 ;
 445             }
 446             vgl->local_count += 4;
 447
 448             // Basic vertex shader that we use in both cases
 449             const char *vertexShader =
 450             "#version 120\n"
 451             "varying   vec4 TexCoord0,TexCoord1, TexCoord2;"
 452             "attribute vec4 MultiTexCoord0,MultiTexCoord1,MultiTexCoord2;"
 453             "attribute vec4 vertex_position;"
 454             "void main() {"
 455             " TexCoord0 = MultiTexCoord0;"
 456             " TexCoord1 = MultiTexCoord1;"
 457             " TexCoord2 = MultiTexCoord2;"
 458             " gl_Position = vertex_position; }";
 459
 460             // Dummy shader for text overlay
 461             const char *helloShader =
 462             "#version 120\n"
 463             "uniform sampler2D Texture[3];"
 464             "uniform vec4 fillColor;"
 465             "varying vec4 TexCoord0,TexCoord1,TexCoord2;"
 466             "void main()"
 467             "{ "
 468             "  gl_FragColor = texture2D(Texture[0], TexCoord0.st)*fillColor;}";
 469
 470             vgl->shader[2] = vgl->CreateShader( GL_VERTEX_SHADER );
 471             vgl->ShaderSource( vgl->shader[2], 1, (const GLchar **)&vertexShader, NULL);
 472             vgl->CompileShader( vgl->shader[2] );
 473
 474             /* Create 'dummy' shader that handles subpicture overlay for now*/
 475             vgl->shader[1] = vgl->CreateShader( GL_FRAGMENT_SHADER );
 476             vgl->ShaderSource( vgl->shader[1], 1, &helloShader, NULL);
 477             vgl->CompileShader( vgl->shader[1] );
 478             vgl->program[1] = vgl->CreateProgram();
 479             vgl->AttachShader( vgl->program[1], vgl->shader[1]);
 480             vgl->AttachShader( vgl->program[1], vgl->shader[2]);
 481             vgl->LinkProgram( vgl->program[1] );
 482
 483             // Create shader from code
 484             vgl->shader[0] = vgl->CreateShader( GL_FRAGMENT_SHADER );
 485             vgl->program[0] = vgl->CreateProgram();
 486             if( need_fs_yuv )
 487             {
 488                 vgl->ShaderSource( vgl->shader[0], 1, (const GLchar **)&code, NULL );
 489                 vgl->CompileShader( vgl->shader[0]);
 490                 vgl->AttachShader( vgl->program[0], vgl->shader[0] );
 491             } else {
 492                 /* Use simpler shader if we don't need to to yuv -> rgb,
 493                    for example when input is allready rgb (.bmp image).*/
 494                 vgl->AttachShader( vgl->program[0], vgl->shader[1] );
 495             }
 496             vgl->AttachShader( vgl->program[0], vgl->shader[2]);
 497
 498             vgl->LinkProgram( vgl->program[0] );
 499
 500             free(code);
 501             for( GLuint i = 0; i < 2; i++ )
 502             {
 503                 int infoLength = 0;
 504                 int charsWritten = 0;
 505                 char *infolog;
 506                 vgl->GetProgramiv( vgl->program[i], GL_INFO_LOG_LENGTH, &infoLength );
 507                 if( infoLength > 1 )
 508                 {
 509                     /* If there is some message, better to check linking is ok */
 510                     GLint link_status = GL_TRUE;
 511                     vgl->GetProgramiv( vgl->program[i], GL_LINK_STATUS, &link_status );
 512
 513                     infolog = (char *)malloc(infoLength);
 514                     vgl->GetProgramInfoLog( vgl->program[i], infoLength, &charsWritten, infolog );
 515                     fprintf(stderr, "shader program %d:%s %d\n",i,infolog,infoLength);
 516                     free(infolog);
 517
 518                     /* Check shaders messages too */
 519                     for( GLuint j = 0; j < 2; j++ )
 520                     {
 521                         vgl->GetShaderiv( vgl->shader[j], GL_INFO_LOG_LENGTH, &infoLength );
 522                         if( infoLength > 1 )
 523                         {
 524                             infolog = (char *)malloc(infoLength);
 525                             vgl->GetShaderInfoLog( vgl->shader[j], infoLength, &charsWritten, infolog );
 526                             fprintf(stderr, "shader %d: %s\n",j,infolog );
 527                             free( infolog );
 528                         }
 529                     }
 530
 531                     if( link_status == GL_FALSE )
 532                     {
 533                         fprintf( stderr, "Unable to use program %d\n", i );
 534                         free( vgl );
 535                         return NULL;
 536                     }
 537                 }
 538             }
 539     }
 540
 541     /* */
 542     glDisable(GL_BLEND);
 543     glDisable(GL_DEPTH_TEST);
 544     glDepthMask(GL_FALSE);
 545     glDisable(GL_CULL_FACE);
 546     glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 547     glClear(GL_COLOR_BUFFER_BIT);
 548
 549     vlc_gl_Unlock(vgl->gl);
 550
 551     /* */
 552     for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
 553         for (int j = 0; j < PICTURE_PLANE_MAX; j++)
 554             vgl->texture[i][j] = 0;
 555     }
 556     vgl->region_count = 0;
 557     vgl->region = NULL;
 558     vgl->pool = NULL;
 559
 560     *fmt = vgl->fmt;
 561     if (subpicture_chromas) {
 562         *subpicture_chromas = gl_subpicture_chromas;
 563     }
 564     return vgl;
 565 }
 566
 567 void vout_display_opengl_Delete(vout_display_opengl_t *vgl)
 568 {
 569     /* */
 570     if (!vlc_gl_Lock(vgl->gl)) {
 571
 572         glFinish();
 573         glFlush();
 574         for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++)
 575             glDeleteTextures(vgl->chroma->plane_count, vgl->texture[i]);
 576         for (int i = 0; i < vgl->region_count; i++) {
 577             if (vgl->region[i].texture)
 578                 glDeleteTextures(1, &vgl->region[i].texture);
 579         }
 580         free(vgl->region);
 581
 582         if (vgl->program[0])
 583         {
 584             for( int i = 0; i < 2; i++ )
 585                 vgl->DeleteProgram( vgl->program[i] );
 586             for( int i = 0; i < 3; i++ )
 587                 vgl->DeleteShader( vgl->shader[i] );
 588         }
 589
 590         vlc_gl_Unlock(vgl->gl);
 591     }
 592     if (vgl->pool)
 593         picture_pool_Delete(vgl->pool);
 594     free(vgl);
 595 }
 596
 597 picture_pool_t *vout_display_opengl_GetPool(vout_display_opengl_t *vgl, unsigned requested_count)
 598 {
 599     if (vgl->pool)
 600         return vgl->pool;
 601
 602     /* Allocate our pictures */
 603     picture_t *picture[VLCGL_PICTURE_MAX] = {NULL, };
 604     unsigned count = 0;
 605
 606     for (count = 0; count < __MIN(VLCGL_PICTURE_MAX, requested_count); count++) {
 607         picture[count] = picture_NewFromFormat(&vgl->fmt);
 608         if (!picture[count])
 609             break;
 610     }
 611     if (count <= 0)
 612         return NULL;
 613
 614     /* Wrap the pictures into a pool */
 615     picture_pool_configuration_t cfg;
 616     memset(&cfg, 0, sizeof(cfg));
 617     cfg.picture_count = count;
 618     cfg.picture       = picture;
 619     vgl->pool = picture_pool_NewExtended(&cfg);
 620     if (!vgl->pool)
 621         goto error;
 622
 623     /* Allocates our textures */
 624     if (vlc_gl_Lock(vgl->gl))
 625         return vgl->pool;
 626
 627     for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
 628         glGenTextures(vgl->chroma->plane_count, vgl->texture[i]);
 629         for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 630             if (vgl->use_multitexture)
 631             {
 632                 vgl->ActiveTexture(GL_TEXTURE0 + j);
 633                 vgl->ClientActiveTexture(GL_TEXTURE0 + j);
 634             }
 635             glBindTexture(vgl->tex_target, vgl->texture[i][j]);
 636
 637 #if !USE_OPENGL_ES
 638             /* Set the texture parameters */
 639             glTexParameterf(vgl->tex_target, GL_TEXTURE_PRIORITY, 1.0);
 640             glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 641 #endif
 642
 643             glTexParameteri(vgl->tex_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 644             glTexParameteri(vgl->tex_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 645             glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 646             glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 647
 648             /* Call glTexImage2D only once, and use glTexSubImage2D later */
 649             glTexImage2D(vgl->tex_target, 0,
 650                          vgl->tex_internal, vgl->tex_width[j], vgl->tex_height[j],
 651                          0, vgl->tex_format, vgl->tex_type, NULL);
 652         }
 653     }
 654
 655     vlc_gl_Unlock(vgl->gl);
 656
 657     return vgl->pool;
 658
 659 error:
 660     for (unsigned i = 0; i < count; i++)
 661         picture_Release(picture[i]);
 662     return NULL;
 663 }
 664
 665 int vout_display_opengl_Prepare(vout_display_opengl_t *vgl,
 666                                 picture_t *picture, subpicture_t *subpicture)
 667 {
 668     /* On Win32/GLX, we do this the usual way:
 669        + Fill the buffer with new content,
 670        + Reload the texture,
 671        + Use the texture.
 672
 673        On OS X with VRAM or AGP texturing, the order has to be:
 674        + Reload the texture,
 675        + Fill the buffer with new content,
 676        + Use the texture.
 677
 678        (Thanks to gcc from the Arstechnica forums for the tip)
 679
 680        Therefore on OSX, we have to use two buffers and textures and use a
 681        lock(/unlock) managed picture pool.
 682      */
 683
 684     if (vlc_gl_Lock(vgl->gl))
 685         return VLC_EGENERIC;
 686
 687     /* Update the texture */
 688     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 689         if (vgl->use_multitexture)
 690         {
 691             vgl->ActiveTexture(GL_TEXTURE0 + j);
 692             vgl->ClientActiveTexture(GL_TEXTURE0 + j);
 693         }
 694         glBindTexture(vgl->tex_target, vgl->texture[0][j]);
 695         glPixelStorei(GL_UNPACK_ROW_LENGTH, picture->p[j].i_pitch / picture->p[j].i_pixel_pitch);
 696         glTexSubImage2D(vgl->tex_target, 0,
 697                         0, 0,
 698                         vgl->fmt.i_width  * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den,
 699                         vgl->fmt.i_height * vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den,
 700                         vgl->tex_format, vgl->tex_type, picture->p[j].p_pixels);
 701     }
 702
 703     int         last_count = vgl->region_count;
 704     gl_region_t *last = vgl->region;
 705
 706     vgl->region_count = 0;
 707     vgl->region       = NULL;
 708
 709     if (subpicture) {
 710
 711         int count = 0;
 712         for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next)
 713             count++;
 714
 715         vgl->region_count = count;
 716         vgl->region       = calloc(count, sizeof(*vgl->region));
 717
 718         if (vgl->use_multitexture)
 719         {
 720             vgl->ActiveTexture(GL_TEXTURE0 + 0);
 721             vgl->ClientActiveTexture(GL_TEXTURE0 + 0);
 722         }
 723         int i = 0;
 724         for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next, i++) {
 725             gl_region_t *glr = &vgl->region[i];
 726
 727             glr->format = GL_RGBA;
 728             glr->type   = GL_UNSIGNED_BYTE;
 729             glr->width  = r->fmt.i_visible_width;
 730             glr->height = r->fmt.i_visible_height;
 731             if(!vgl->supports_npot )
 732             {
 733                 glr->width  = GetAlignedSize( glr->width );
 734                 glr->height = GetAlignedSize( glr->height );
 735             }
 736             glr->alpha  = (float)subpicture->i_alpha * r->i_alpha / 255 / 255;
 737             glr->left   =  2.0 * (r->i_x                          ) / subpicture->i_original_picture_width  - 1.0;
 738             glr->top    = -2.0 * (r->i_y                          ) / subpicture->i_original_picture_height + 1.0;
 739             glr->right  =  2.0 * (r->i_x + r->fmt.i_visible_width ) / subpicture->i_original_picture_width  - 1.0;
 740             glr->bottom = -2.0 * (r->i_y + r->fmt.i_visible_height) / subpicture->i_original_picture_height + 1.0;
 741
 742             glr->texture = 0;
 743             for (int j = 0; j < last_count; j++) {
 744                 if (last[j].texture &&
 745                     last[j].width  == glr->width &&
 746                     last[j].height == glr->height &&
 747                     last[j].format == glr->format &&
 748                     last[j].type   == glr->type) {
 749                     glr->texture = last[j].texture;
 750                     memset(&last[j], 0, sizeof(last[j]));
 751                     break;
 752                 }
 753             }
 754
 755             const int pixels_offset = r->fmt.i_y_offset * r->p_picture->p->i_pitch +
 756                                       r->fmt.i_x_offset * r->p_picture->p->i_pixel_pitch;
 757             if (glr->texture) {
 758                 glBindTexture(GL_TEXTURE_2D, glr->texture);
 759                 /* TODO set GL_UNPACK_ALIGNMENT */
 760                 glPixelStorei(GL_UNPACK_ROW_LENGTH, r->p_picture->p->i_pitch / r->p_picture->p->i_pixel_pitch);
 761                 glTexSubImage2D(GL_TEXTURE_2D, 0,
 762                                 0, 0, glr->width, glr->height,
 763                                 glr->format, glr->type, &r->p_picture->p->p_pixels[pixels_offset]);
 764             } else {
 765                 glGenTextures(1, &glr->texture);
 766                 glBindTexture(GL_TEXTURE_2D, glr->texture);
 767 #if !USE_OPENGL_ES
 768                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_PRIORITY, 1.0);
 769                 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 770 #endif
 771                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 772                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 773                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 774                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 775                 /* TODO set GL_UNPACK_ALIGNMENT */
 776                 glPixelStorei(GL_UNPACK_ROW_LENGTH, r->p_picture->p->i_pitch / r->p_picture->p->i_pixel_pitch);
 777                 glTexImage2D(GL_TEXTURE_2D, 0, glr->format,
 778                              glr->width, glr->height, 0, glr->format, glr->type,
 779                              &r->p_picture->p->p_pixels[pixels_offset]);
 780             }
 781         }
 782     }
 783     for (int i = 0; i < last_count; i++) {
 784         if (last[i].texture)
 785             glDeleteTextures(1, &last[i].texture);
 786     }
 787     free(last);
 788
 789     vlc_gl_Unlock(vgl->gl);
 790     VLC_UNUSED(subpicture);
 791     return VLC_SUCCESS;
 792 }
 793
 794 static void draw_without_shaders( vout_display_opengl_t *vgl, float *left, float *top, float *right, float *bottom )
 795 {
 796     static const GLfloat vertexCoord[] = {
 797         -1.0f, -1.0f,
 798          1.0f, -1.0f,
 799         -1.0f,  1.0f,
 800          1.0f,  1.0f,
 801     };
 802
 803     const GLfloat textureCoord[8] = {
 804         left[0],  bottom[0],
 805         right[0], bottom[0],
 806         left[0],  top[0],
 807         right[0], top[0]
 808     };
 809
 810     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 811        vgl->ActiveTexture( GL_TEXTURE0 + j );
 812        vgl->ClientActiveTexture( GL_TEXTURE0 + j );
 813
 814        glEnableClientState(GL_VERTEX_ARRAY);
 815        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 816
 817        glEnable(vgl->tex_target);
 818
 819        glBindTexture(vgl->tex_target, vgl->texture[0][j]);
 820        glTexCoordPointer(2, GL_FLOAT, 0, textureCoord);
 821     }
 822     vgl->ActiveTexture( GL_TEXTURE0 );
 823     vgl->ClientActiveTexture( GL_TEXTURE0 );
 824
 825     glVertexPointer(2, GL_FLOAT, 0, vertexCoord);
 826
 827     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 828
 829     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 830        vgl->ActiveTexture( GL_TEXTURE0 + j );
 831        vgl->ClientActiveTexture( GL_TEXTURE0 + j );
 832        glDisable(vgl->tex_target);
 833        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 834        glDisableClientState(GL_VERTEX_ARRAY);
 835     }
 836     vgl->ActiveTexture( GL_TEXTURE0 );
 837     vgl->ClientActiveTexture( GL_TEXTURE0 );
 838 }
 839
 840 static void draw_with_shaders( vout_display_opengl_t *vgl, float *left, float *top, float *right, float *bottom )
 841 {
 842
 843     const GLfloat vertexCoord[] = {
 844         -1.0, 1.0,
 845         -1.0, -1.0,
 846         1.0, 1.0,
 847         1.0, -1.0,
 848     };
 849
 850     for( unsigned j = 0; j < vgl->chroma->plane_count; j++)
 851     {
 852         char *attribute = NULL;
 853         const GLfloat texCoord[] = {
 854             left[j], top[j],
 855             left[j], bottom[j],
 856             right[j], top[j],
 857             right[j], bottom[j],
 858         };
 859         vgl->ActiveTexture( GL_TEXTURE0+j);
 860         vgl->ClientActiveTexture( GL_TEXTURE0+j);
 861         glEnable(vgl->tex_target);
 862         glBindTexture(vgl->tex_target, vgl->texture[0][j]);
 863         if(asprintf( &attribute, "MultiTexCoord%1d", j ) == -1 )
 864             return;
 865
 866         vgl->EnableVertexAttribArray( vgl->GetAttribLocation(vgl->program[0], attribute ) );
 867         vgl->VertexAttribPointer( vgl->GetAttribLocation( vgl->program[0], attribute ), 2, GL_FLOAT, 0, 0, texCoord);
 868         free( attribute );
 869         attribute = NULL;
 870     }
 871     vgl->ActiveTexture(GL_TEXTURE0 + 0);
 872     vgl->ClientActiveTexture(GL_TEXTURE0 + 0);
 873     vgl->EnableVertexAttribArray( vgl->GetAttribLocation( vgl->program[0], "vertex_position"));
 874     vgl->VertexAttribPointer( vgl->GetAttribLocation( vgl->program[0], "vertex_position"), 2, GL_FLOAT, 0, 0, vertexCoord);
 875
 876     glDrawArrays( GL_TRIANGLE_STRIP, 0, 4);
 877 }
 878
 879 int vout_display_opengl_Display(vout_display_opengl_t *vgl,
 880                                 const video_format_t *source)
 881 {
 882     if (vlc_gl_Lock(vgl->gl))
 883         return VLC_EGENERIC;
 884
 885     /* glTexCoord works differently with GL_TEXTURE_2D and
 886        GL_TEXTURE_RECTANGLE_EXT */
 887     float left[PICTURE_PLANE_MAX];
 888     float top[PICTURE_PLANE_MAX];
 889     float right[PICTURE_PLANE_MAX];
 890     float bottom[PICTURE_PLANE_MAX];
 891     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 892         float scale_w, scale_h;
 893         if (vgl->tex_target == GL_TEXTURE_2D) {
 894             scale_w = (float)vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den / vgl->tex_width[j];
 895             scale_h = (float)vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den / vgl->tex_height[j];
 896
 897         } else {
 898             scale_w = 1.0;
 899             scale_h = 1.0;
 900         }
 901         left[j]   = (source->i_x_offset +                       0 ) * scale_w;
 902         top[j]    = (source->i_y_offset +                       0 ) * scale_h;
 903         right[j]  = (source->i_x_offset + source->i_visible_width ) * scale_w;
 904         bottom[j] = (source->i_y_offset + source->i_visible_height) * scale_h;
 905     }
 906
 907
 908     /* Why drawing here and not in Render()? Because this way, the
 909        OpenGL providers can call vout_display_opengl_Display to force redraw.i
 910        Currently, the OS X provider uses it to get a smooth window resizing */
 911
 912     glClear(GL_COLOR_BUFFER_BIT);
 913
 914
 915     if( vgl->program[0] )
 916     {
 917         vgl->UseProgram(vgl->program[0]);
 918         vgl->Uniform4fv( vgl->GetUniformLocation( vgl->program[0], "coefficient" ), 4, vgl->local_value);
 919         vgl->Uniform1i( vgl->GetUniformLocation( vgl->program[0], "Texture[0]" ), 0);
 920         vgl->Uniform1i( vgl->GetUniformLocation( vgl->program[0], "Texture[1]" ), 1);
 921         vgl->Uniform1i( vgl->GetUniformLocation( vgl->program[0], "Texture[2]" ), 2);
 922         draw_with_shaders( vgl, left, top ,right, bottom );
 923         // Change the program for overlays
 924         vgl->UseProgram(vgl->program[1]);
 925         vgl->Uniform1i( vgl->GetUniformLocation( vgl->program[1], "Texture[0]" ), 0);
 926     } else {
 927         draw_without_shaders( vgl, left, top, right, bottom );
 928     }
 929
 930     vgl->ActiveTexture(GL_TEXTURE0 + 0);
 931     vgl->ClientActiveTexture(GL_TEXTURE0 + 0);
 932     glEnable(GL_TEXTURE_2D);
 933     glEnable(GL_BLEND);
 934     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 935
 936     for (int i = 0; i < vgl->region_count; i++) {
 937         gl_region_t *glr = &vgl->region[i];
 938         const GLfloat vertexCoord[] = {
 939             glr->left, glr->top,
 940             glr->left, glr->bottom,
 941             glr->right, glr->top,
 942             glr->right,glr->bottom,
 943         };
 944         static const GLfloat textureCoord[] = {
 945             0.0, 0.0,
 946             0.0, 1.0,
 947             1.0, 0.0,
 948             1.0, 1.0,
 949         };
 950
 951         glBindTexture(GL_TEXTURE_2D, glr->texture);
 952         if( vgl->program[0] )
 953         {
 954             vgl->Uniform4f( vgl->GetUniformLocation( vgl->program[1], "fillColor"), 1.0f, 1.0f, 1.0f, glr->alpha);
 955             vgl->EnableVertexAttribArray( vgl->GetAttribLocation( vgl->program[1], "MultiTexCoord0") );
 956             vgl->VertexAttribPointer( vgl->GetAttribLocation( vgl->program[1], "MultiTexCoord0"), 2, GL_FLOAT, 0, 0, textureCoord);
 957             vgl->EnableVertexAttribArray( vgl->GetAttribLocation( vgl->program[1], "vertex_position"));
 958             vgl->VertexAttribPointer( vgl->GetAttribLocation( vgl->program[1], "vertex_position"), 2, GL_FLOAT, 0, 0, vertexCoord);
 959         }
 960         else
 961         {
 962             glEnableClientState(GL_VERTEX_ARRAY);
 963             glColor4f( 1.0f, 1.0f, 1.0f, glr->alpha );
 964             glEnable(GL_TEXTURE_COORD_ARRAY);
 965             glEnable(GL_VERTEX_ARRAY);
 966             glTexCoordPointer(2, GL_FLOAT, 0, textureCoord);
 967             glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 968             glVertexPointer(2, GL_FLOAT, 0, vertexCoord);
 969         }
 970
 971         glDrawArrays( GL_TRIANGLE_STRIP, 0, 4 );
 972
 973         if( !vgl->program[0] )
 974         {
 975             glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 976             glDisableClientState(GL_VERTEX_ARRAY);
 977         }
 978     }
 979     glDisable(GL_BLEND);
 980     glDisable(GL_TEXTURE_2D);
 981
 982     vlc_gl_Swap(vgl->gl);
 983
 984     vlc_gl_Unlock(vgl->gl);
 985     return VLC_SUCCESS;
 986 }
 987