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) 2004-2013 VLC authors and VideoLAN
   5  * Copyright (C) 2009, 2011 Laurent Aimar
   6  *
   7  * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
   8  *          Ilkka Ollakka <ileoo@videolan.org>
   9  *          Rémi Denis-Courmont
  10  *          Adrien Maglo <magsoft at videolan dot org>
  11  *          Felix Paul Kühne <fkuehne at videolan dot org>
  12  *          Pierre d'Herbemont <pdherbemont at videolan dot org>
  13  *
  14  * This program is free software; you can redistribute it and/or modify it
  15  * under the terms of the GNU Lesser General Public License as published by
  16  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * along with this program; if not, write to the Free Software Foundation,
  26  * 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 #if USE_OPENGL_ES == 2 || defined(__APPLE__)
  44 #   define PFNGLGETPROGRAMIVPROC             typeof(glGetProgramiv)*
  45 #   define PFNGLGETPROGRAMINFOLOGPROC        typeof(glGetProgramInfoLog)*
  46 #   define PFNGLGETSHADERIVPROC              typeof(glGetShaderiv)*
  47 #   define PFNGLGETSHADERINFOLOGPROC         typeof(glGetShaderInfoLog)*
  48 #   define PFNGLGETUNIFORMLOCATIONPROC       typeof(glGetUniformLocation)*
  49 #   define PFNGLGETATTRIBLOCATIONPROC        typeof(glGetAttribLocation)*
  50 #   define PFNGLVERTEXATTRIBPOINTERPROC      typeof(glVertexAttribPointer)*
  51 #   define PFNGLENABLEVERTEXATTRIBARRAYPROC  typeof(glEnableVertexAttribArray)*
  52 #   define PFNGLUNIFORM4FVPROC               typeof(glUniform4fv)*
  53 #   define PFNGLUNIFORM4FPROC                typeof(glUniform4f)*
  54 #   define PFNGLUNIFORM1IPROC                typeof(glUniform1i)*
  55 #   define PFNGLCREATESHADERPROC             typeof(glCreateShader)*
  56 #   define PFNGLSHADERSOURCEPROC             typeof(glShaderSource)*
  57 #   define PFNGLCOMPILESHADERPROC            typeof(glCompileShader)*
  58 #   define PFNGLDELETESHADERPROC             typeof(glDeleteShader)*
  59 #   define PFNGLCREATEPROGRAMPROC            typeof(glCreateProgram)*
  60 #   define PFNGLLINKPROGRAMPROC              typeof(glLinkProgram)*
  61 #   define PFNGLUSEPROGRAMPROC               typeof(glUseProgram)*
  62 #   define PFNGLDELETEPROGRAMPROC            typeof(glDeleteProgram)*
  63 #   define PFNGLATTACHSHADERPROC             typeof(glAttachShader)*
  64 #if defined(__APPLE__) && USE_OPENGL_ES
  65 #   import <CoreFoundation/CoreFoundation.h>
  66 #endif
  67 #endif
  68
  69 #if USE_OPENGL_ES
  70 #   define GLSL_VERSION "100"
  71 #   define VLCGL_TEXTURE_COUNT 1
  72 #   define VLCGL_PICTURE_MAX 1
  73 #   define PRECISION "precision highp float;"
  74 #if USE_OPENGL_ES == 2
  75 #   define SUPPORTS_SHADERS
  76 #   define glClientActiveTexture(x)
  77 #else
  78 #   define SUPPORTS_FIXED_PIPELINE
  79 #   define GL_MAX_TEXTURE_IMAGE_UNITS GL_MAX_TEXTURE_UNITS
  80 #endif
  81 #else
  82 #   define GLSL_VERSION "120"
  83 #   define VLCGL_TEXTURE_COUNT 1
  84 #   define VLCGL_PICTURE_MAX 128
  85 #   define PRECISION ""
  86 #   define SUPPORTS_SHADERS
  87 #   define SUPPORTS_FIXED_PIPELINE
  88 #endif
  89
  90 static const vlc_fourcc_t gl_subpicture_chromas[] = {
  91     VLC_CODEC_RGBA,
  92     0
  93 };
  94
  95 typedef struct {
  96     GLuint   texture;
  97     unsigned format;
  98     unsigned type;
  99     unsigned width;
 100     unsigned height;
 101
 102     float    alpha;
 103
 104     float    top;
 105     float    left;
 106     float    bottom;
 107     float    right;
 108
 109     float    tex_width;
 110     float    tex_height;
 111 } gl_region_t;
 112
 113 struct vout_display_opengl_t {
 114
 115     vlc_gl_t   *gl;
 116
 117     video_format_t fmt;
 118     const vlc_chroma_description_t *chroma;
 119
 120     int        tex_target;
 121     int        tex_format;
 122     int        tex_internal;
 123     int        tex_type;
 124
 125     int        tex_width[PICTURE_PLANE_MAX];
 126     int        tex_height[PICTURE_PLANE_MAX];
 127
 128     GLuint     texture[VLCGL_TEXTURE_COUNT][PICTURE_PLANE_MAX];
 129
 130     int         region_count;
 131     gl_region_t *region;
 132
 133
 134     picture_pool_t *pool;
 135
 136     /* index 0 for normal and 1 for subtitle overlay */
 137     GLuint     program[2];
 138     GLint      shader[3]; //3. is for the common vertex shader
 139     int        local_count;
 140     GLfloat    local_value[16];
 141
 142     /* Shader variables commands*/
 143 #ifdef SUPPORTS_SHADERS
 144     PFNGLGETUNIFORMLOCATIONPROC      GetUniformLocation;
 145     PFNGLGETATTRIBLOCATIONPROC       GetAttribLocation;
 146     PFNGLVERTEXATTRIBPOINTERPROC     VertexAttribPointer;
 147     PFNGLENABLEVERTEXATTRIBARRAYPROC EnableVertexAttribArray;
 148
 149     PFNGLUNIFORM4FVPROC   Uniform4fv;
 150     PFNGLUNIFORM4FPROC    Uniform4f;
 151     PFNGLUNIFORM1IPROC    Uniform1i;
 152
 153     /* Shader command */
 154     PFNGLCREATESHADERPROC CreateShader;
 155     PFNGLSHADERSOURCEPROC ShaderSource;
 156     PFNGLCOMPILESHADERPROC CompileShader;
 157     PFNGLDELETESHADERPROC   DeleteShader;
 158
 159     PFNGLCREATEPROGRAMPROC CreateProgram;
 160     PFNGLLINKPROGRAMPROC   LinkProgram;
 161     PFNGLUSEPROGRAMPROC    UseProgram;
 162     PFNGLDELETEPROGRAMPROC DeleteProgram;
 163
 164     PFNGLATTACHSHADERPROC  AttachShader;
 165
 166     /* Shader log commands */
 167     PFNGLGETPROGRAMIVPROC  GetProgramiv;
 168     PFNGLGETPROGRAMINFOLOGPROC GetProgramInfoLog;
 169     PFNGLGETSHADERIVPROC   GetShaderiv;
 170     PFNGLGETSHADERINFOLOGPROC GetShaderInfoLog;
 171 #endif
 172
 173
 174     /* multitexture */
 175     bool use_multitexture;
 176
 177     /* Non-power-of-2 texture size support */
 178     bool supports_npot;
 179
 180     uint8_t *texture_temp_buf;
 181     int      texture_temp_buf_size;
 182 };
 183
 184 static inline int GetAlignedSize(unsigned size)
 185 {
 186     /* Return the smallest larger or equal power of 2 */
 187     unsigned align = 1 << (8 * sizeof (unsigned) - clz(size));
 188     return ((align >> 1) == size) ? size : align;
 189 }
 190
 191 #if !USE_OPENGL_ES
 192 static bool IsLuminance16Supported(int target)
 193 {
 194     GLuint texture;
 195
 196     glGenTextures(1, &texture);
 197     glBindTexture(target, texture);
 198     glTexImage2D(target, 0, GL_LUMINANCE16,
 199                  64, 64, 0, GL_LUMINANCE, GL_UNSIGNED_SHORT, NULL);
 200     GLint size = 0;
 201     glGetTexLevelParameteriv(target, 0, GL_TEXTURE_LUMINANCE_SIZE, &size);
 202
 203     glDeleteTextures(1, &texture);
 204
 205     return size == 16;
 206 }
 207 #endif
 208
 209 #ifdef SUPPORTS_SHADERS
 210 static void BuildVertexShader(vout_display_opengl_t *vgl,
 211                               GLint *shader)
 212 {
 213     /* Basic vertex shader */
 214     const char *vertexShader =
 215         "#version " GLSL_VERSION "\n"
 216         PRECISION
 217         "varying vec4 TexCoord0,TexCoord1, TexCoord2;"
 218         "attribute vec4 MultiTexCoord0,MultiTexCoord1,MultiTexCoord2;"
 219         "attribute vec4 VertexPosition;"
 220         "void main() {"
 221         " TexCoord0 = MultiTexCoord0;"
 222         " TexCoord1 = MultiTexCoord1;"
 223         " TexCoord2 = MultiTexCoord2;"
 224         " gl_Position = VertexPosition;"
 225         "}";
 226
 227     *shader = vgl->CreateShader(GL_VERTEX_SHADER);
 228     vgl->ShaderSource(*shader, 1, &vertexShader, NULL);
 229     vgl->CompileShader(*shader);
 230 }
 231
 232 static void BuildYUVFragmentShader(vout_display_opengl_t *vgl,
 233                                    GLint *shader,
 234                                    int *local_count,
 235                                    GLfloat *local_value,
 236                                    const video_format_t *fmt,
 237                                    float yuv_range_correction)
 238
 239 {
 240     /* [R/G/B][Y U V O] from TV range to full range
 241      * XXX we could also do hue/brightness/constrast/gamma
 242      * by simply changing the coefficients
 243      */
 244     const float matrix_bt601_tv2full[12] = {
 245         1.164383561643836,  0.0000,             1.596026785714286, -0.874202217873451 ,
 246         1.164383561643836, -0.391762290094914, -0.812967647237771,  0.531667823499146 ,
 247         1.164383561643836,  2.017232142857142,  0.0000,            -1.085630789302022 ,
 248     };
 249     const float matrix_bt709_tv2full[12] = {
 250         1.164383561643836,  0.0000,             1.792741071428571, -0.972945075016308 ,
 251         1.164383561643836, -0.21324861427373,  -0.532909328559444,  0.301482665475862 ,
 252         1.164383561643836,  2.112401785714286,  0.0000,            -1.133402217873451 ,
 253     };
 254     const float (*matrix) = fmt->i_height > 576 ? matrix_bt709_tv2full
 255                                                 : matrix_bt601_tv2full;
 256
 257     /* Basic linear YUV -> RGB conversion using bilinear interpolation */
 258     const char *template_glsl_yuv =
 259         "#version " GLSL_VERSION "\n"
 260         PRECISION
 261         "uniform sampler2D Texture0;"
 262         "uniform sampler2D Texture1;"
 263         "uniform sampler2D Texture2;"
 264         "uniform vec4      Coefficient[4];"
 265         "varying vec4      TexCoord0,TexCoord1,TexCoord2;"
 266
 267         "void main(void) {"
 268         " vec4 x,y,z,result;"
 269         " x  = texture2D(Texture0, TexCoord0.st);"
 270         " %c = texture2D(Texture1, TexCoord1.st);"
 271         " %c = texture2D(Texture2, TexCoord2.st);"
 272
 273         " result = x * Coefficient[0] + Coefficient[3];"
 274         " result = (y * Coefficient[1]) + result;"
 275         " result = (z * Coefficient[2]) + result;"
 276         " gl_FragColor = result;"
 277         "}";
 278     bool swap_uv = fmt->i_chroma == VLC_CODEC_YV12 ||
 279                    fmt->i_chroma == VLC_CODEC_YV9;
 280
 281     char *code;
 282     if (asprintf(&code, template_glsl_yuv,
 283                  swap_uv ? 'z' : 'y',
 284                  swap_uv ? 'y' : 'z') < 0)
 285         code = NULL;
 286
 287     for (int i = 0; i < 4; i++) {
 288         float correction = i < 3 ? yuv_range_correction : 1.0;
 289         /* We place coefficient values for coefficient[4] in one array from matrix values.
 290            Notice that we fill values from top down instead of left to right.*/
 291         for (int j = 0; j < 4; j++)
 292             local_value[*local_count + i*4+j] = j < 3 ? correction * matrix[j*4+i]
 293                                                       : 0.0 ;
 294     }
 295     (*local_count) += 4;
 296
 297
 298     *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
 299     vgl->ShaderSource(*shader, 1, (const char **)&code, NULL);
 300     vgl->CompileShader(*shader);
 301
 302     free(code);
 303 }
 304
 305 #if 0
 306 static void BuildRGBFragmentShader(vout_display_opengl_t *vgl,
 307                                    GLint *shader)
 308 {
 309     // Simple shader for RGB
 310     const char *code =
 311         "#version " GLSL_VERSION "\n"
 312         PRECISION
 313         "uniform sampler2D Texture[3];"
 314         "varying vec4 TexCoord0,TexCoord1,TexCoord2;"
 315         "void main()"
 316         "{ "
 317         "  gl_FragColor = texture2D(Texture[0], TexCoord0.st);"
 318         "}";
 319     *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
 320     vgl->ShaderSource(*shader, 1, &code, NULL);
 321     vgl->CompileShader(*shader);
 322 }
 323 #endif
 324
 325 static void BuildRGBAFragmentShader(vout_display_opengl_t *vgl,
 326                                    GLint *shader)
 327 {
 328     // Simple shader for RGBA
 329     const char *code =
 330         "#version " GLSL_VERSION "\n"
 331         PRECISION
 332         "uniform sampler2D Texture;"
 333         "uniform vec4 FillColor;"
 334         "varying vec4 TexCoord0;"
 335         "void main()"
 336         "{ "
 337         "  gl_FragColor = texture2D(Texture, TexCoord0.st) * FillColor;"
 338         "}";
 339     *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
 340     vgl->ShaderSource(*shader, 1, &code, NULL);
 341     vgl->CompileShader(*shader);
 342 }
 343
 344 static void BuildXYZFragmentShader(vout_display_opengl_t *vgl,
 345                                    GLint *shader)
 346 {
 347     /* Shader for XYZ to RGB correction
 348      * 3 steps :
 349      *  - XYZ gamma correction
 350      *  - XYZ to RGB matrix conversion
 351      *  - reverse RGB gamma correction
 352      */
 353       const char *code =
 354         "#version " GLSL_VERSION "\n"
 355         PRECISION
 356         "uniform sampler2D Texture0;"
 357         "uniform vec4 xyz_gamma = vec4(2.6);"
 358         "uniform vec4 rgb_gamma = vec4(1.0/2.2);"
 359         // WARN: matrix Is filled column by column (not row !)
 360         "uniform mat4 matrix_xyz_rgb = mat4("
 361         "    3.240454 , -0.9692660, 0.0556434, 0.0,"
 362         "   -1.5371385,  1.8760108, -0.2040259, 0.0,"
 363         "    -0.4985314, 0.0415560, 1.0572252,  0.0,"
 364         "    0.0,      0.0,         0.0,        1.0 "
 365         " );"
 366
 367         "varying vec4 TexCoord0;"
 368         "void main()"
 369         "{ "
 370         " vec4 v_in, v_out;"
 371         " v_in  = texture2D(Texture0, TexCoord0.st);"
 372         " v_in = pow(v_in, xyz_gamma);"
 373         " v_out = matrix_xyz_rgb * v_in ;"
 374         " v_out = pow(v_out, rgb_gamma) ;"
 375         " v_out = clamp(v_out, 0.0, 1.0) ;"
 376         " gl_FragColor = v_out;"
 377         "}";
 378     *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
 379     vgl->ShaderSource(*shader, 1, &code, NULL);
 380     vgl->CompileShader(*shader);
 381 }
 382
 383 #endif
 384
 385 vout_display_opengl_t *vout_display_opengl_New(video_format_t *fmt,
 386                                                const vlc_fourcc_t **subpicture_chromas,
 387                                                vlc_gl_t *gl)
 388 {
 389     vout_display_opengl_t *vgl = calloc(1, sizeof(*vgl));
 390     if (!vgl)
 391         return NULL;
 392
 393     vgl->gl = gl;
 394     if (vlc_gl_Lock(vgl->gl)) {
 395         free(vgl);
 396         return NULL;
 397     }
 398
 399     if (vgl->gl->getProcAddress == NULL) {
 400         fprintf(stderr, "getProcAddress not implemented, bailing out\n");
 401         free(vgl);
 402         return NULL;
 403     }
 404
 405     const char *extensions = (const char *)glGetString(GL_EXTENSIONS);
 406 #if !USE_OPENGL_ES
 407     const unsigned char *ogl_version = glGetString(GL_VERSION);
 408     bool supports_shaders = strverscmp((const char *)ogl_version, "2.0") >= 0;
 409 #else
 410     bool supports_shaders = false;
 411 #endif
 412
 413 #if USE_OPENGL_ES == 2
 414     vgl->CreateShader  = glCreateShader;
 415     vgl->ShaderSource  = glShaderSource;
 416     vgl->CompileShader = glCompileShader;
 417     vgl->AttachShader  = glAttachShader;
 418
 419     vgl->GetProgramiv  = glGetProgramiv;
 420     vgl->GetShaderiv   = glGetShaderiv;
 421     vgl->GetProgramInfoLog  = glGetProgramInfoLog;
 422     vgl->GetShaderInfoLog   = glGetShaderInfoLog;
 423
 424     vgl->DeleteShader  = glDeleteShader;
 425
 426     vgl->GetUniformLocation = glGetUniformLocation;
 427     vgl->GetAttribLocation  = glGetAttribLocation;
 428     vgl->VertexAttribPointer= glVertexAttribPointer;
 429     vgl->EnableVertexAttribArray = glEnableVertexAttribArray;
 430     vgl->Uniform4fv    = glUniform4fv;
 431     vgl->Uniform4f     = glUniform4f;
 432     vgl->Uniform1i     = glUniform1i;
 433
 434     vgl->CreateProgram = glCreateProgram;
 435     vgl->LinkProgram   = glLinkProgram;
 436     vgl->UseProgram    = glUseProgram;
 437     vgl->DeleteProgram = glDeleteProgram;
 438     supports_shaders = true;
 439 #elif defined(SUPPORTS_SHADERS)
 440     vgl->CreateShader  = (PFNGLCREATESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glCreateShader");
 441     vgl->ShaderSource  = (PFNGLSHADERSOURCEPROC)vlc_gl_GetProcAddress(vgl->gl, "glShaderSource");
 442     vgl->CompileShader = (PFNGLCOMPILESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glCompileShader");
 443     vgl->AttachShader  = (PFNGLATTACHSHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glAttachShader");
 444
 445     vgl->GetProgramiv  = (PFNGLGETPROGRAMIVPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetProgramiv");
 446     vgl->GetShaderiv   = (PFNGLGETSHADERIVPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetShaderiv");
 447     vgl->GetProgramInfoLog  = (PFNGLGETPROGRAMINFOLOGPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetProgramInfoLog");
 448     vgl->GetShaderInfoLog   = (PFNGLGETSHADERINFOLOGPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetShaderInfoLog");
 449
 450     vgl->DeleteShader  = (PFNGLDELETESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteShader");
 451
 452     vgl->GetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetUniformLocation");
 453     vgl->GetAttribLocation  = (PFNGLGETATTRIBLOCATIONPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetAttribLocation");
 454     vgl->VertexAttribPointer= (PFNGLVERTEXATTRIBPOINTERPROC)vlc_gl_GetProcAddress(vgl->gl, "glVertexAttribPointer");
 455     vgl->EnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)vlc_gl_GetProcAddress(vgl->gl, "glEnableVertexAttribArray");
 456     vgl->Uniform4fv    = (PFNGLUNIFORM4FVPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform4fv");
 457     vgl->Uniform4f     = (PFNGLUNIFORM4FPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform4f");
 458     vgl->Uniform1i     = (PFNGLUNIFORM1IPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform1i");
 459
 460     vgl->CreateProgram = (PFNGLCREATEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glCreateProgram");
 461     vgl->LinkProgram   = (PFNGLLINKPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glLinkProgram");
 462     vgl->UseProgram    = (PFNGLUSEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glUseProgram");
 463     vgl->DeleteProgram = (PFNGLDELETEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteProgram");
 464
 465     if (!vgl->CreateShader || !vgl->ShaderSource || !vgl->CreateProgram)
 466         supports_shaders = false;
 467 #endif
 468
 469     vgl->supports_npot = HasExtension(extensions, "GL_ARB_texture_non_power_of_two") ||
 470                          HasExtension(extensions, "GL_APPLE_texture_2D_limited_npot");
 471
 472 #if USE_OPENGL_ES == 2
 473     /* OpenGL ES 2 includes support for non-power of 2 textures by specification
 474      * so checks for extensions are bound to fail. Check for OpenGL ES version instead. */
 475     vgl->supports_npot = true;
 476 #endif
 477
 478     GLint max_texture_units = 0;
 479     glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_texture_units);
 480
 481 #ifdef __APPLE__
 482 #if USE_OPENGL_ES
 483     /* work-around an iOS 6 bug */
 484     if (kCFCoreFoundationVersionNumber >= 786.)
 485         max_texture_units = 8;
 486     supports_shaders = true;
 487 #endif
 488 #endif
 489
 490     /* Initialize with default chroma */
 491     vgl->fmt = *fmt;
 492     vgl->fmt.i_chroma = VLC_CODEC_RGB32;
 493 #   if defined(WORDS_BIGENDIAN)
 494     vgl->fmt.i_rmask  = 0xff000000;
 495     vgl->fmt.i_gmask  = 0x00ff0000;
 496     vgl->fmt.i_bmask  = 0x0000ff00;
 497 #   else
 498     vgl->fmt.i_rmask  = 0x000000ff;
 499     vgl->fmt.i_gmask  = 0x0000ff00;
 500     vgl->fmt.i_bmask  = 0x00ff0000;
 501 #   endif
 502     vgl->tex_target   = GL_TEXTURE_2D;
 503     vgl->tex_format   = GL_RGBA;
 504     vgl->tex_internal = GL_RGBA;
 505     vgl->tex_type     = GL_UNSIGNED_BYTE;
 506     /* Use YUV if possible and needed */
 507     bool need_fs_yuv = false;
 508     bool need_fs_xyz = false;
 509     bool need_fs_rgba = USE_OPENGL_ES == 2;
 510     float yuv_range_correction = 1.0;
 511
 512     if (max_texture_units >= 3 && supports_shaders && vlc_fourcc_IsYUV(fmt->i_chroma)) {
 513         const vlc_fourcc_t *list = vlc_fourcc_GetYUVFallback(fmt->i_chroma);
 514         while (*list) {
 515             const vlc_chroma_description_t *dsc = vlc_fourcc_GetChromaDescription(*list);
 516             if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 1) {
 517                 need_fs_yuv       = true;
 518                 vgl->fmt          = *fmt;
 519                 vgl->fmt.i_chroma = *list;
 520                 vgl->tex_format   = GL_LUMINANCE;
 521                 vgl->tex_internal = GL_LUMINANCE;
 522                 vgl->tex_type     = GL_UNSIGNED_BYTE;
 523                 yuv_range_correction = 1.0;
 524                 break;
 525 #if !USE_OPENGL_ES
 526             } else if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 2 &&
 527                        IsLuminance16Supported(vgl->tex_target)) {
 528                 need_fs_yuv       = true;
 529                 vgl->fmt          = *fmt;
 530                 vgl->fmt.i_chroma = *list;
 531                 vgl->tex_format   = GL_LUMINANCE;
 532                 vgl->tex_internal = GL_LUMINANCE16;
 533                 vgl->tex_type     = GL_UNSIGNED_SHORT;
 534                 yuv_range_correction = (float)((1 << 16) - 1) / ((1 << dsc->pixel_bits) - 1);
 535                 break;
 536 #endif
 537             }
 538             list++;
 539         }
 540     }
 541
 542     if (fmt->i_chroma == VLC_CODEC_XYZ12) {
 543         vlc_fourcc_GetChromaDescription(fmt->i_chroma);
 544         need_fs_xyz       = true;
 545         vgl->fmt          = *fmt;
 546         vgl->fmt.i_chroma = VLC_CODEC_XYZ12;
 547         vgl->tex_format   = GL_RGB;
 548         vgl->tex_internal = GL_RGB;
 549         vgl->tex_type     = GL_UNSIGNED_SHORT;
 550     }
 551     vgl->chroma = vlc_fourcc_GetChromaDescription(vgl->fmt.i_chroma);
 552     vgl->use_multitexture = vgl->chroma->plane_count > 1;
 553
 554     /* Texture size */
 555     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 556         int w = vgl->fmt.i_width  * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den;
 557         int h = vgl->fmt.i_height * vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den;
 558         if (vgl->supports_npot) {
 559             vgl->tex_width[j]  = w;
 560             vgl->tex_height[j] = h;
 561         } else {
 562             vgl->tex_width[j]  = GetAlignedSize(w);
 563             vgl->tex_height[j] = GetAlignedSize(h);
 564         }
 565     }
 566
 567     /* Build program if needed */
 568     vgl->program[0] =
 569     vgl->program[1] = 0;
 570     vgl->shader[0] =
 571     vgl->shader[1] =
 572     vgl->shader[2] = -1;
 573     vgl->local_count = 0;
 574     if (supports_shaders && (need_fs_yuv || need_fs_xyz|| need_fs_rgba)) {
 575 #ifdef SUPPORTS_SHADERS
 576         if (need_fs_xyz)
 577             BuildXYZFragmentShader(vgl, &vgl->shader[0]);
 578         else
 579             BuildYUVFragmentShader(vgl, &vgl->shader[0], &vgl->local_count,
 580                                 vgl->local_value, fmt, yuv_range_correction);
 581
 582         BuildRGBAFragmentShader(vgl, &vgl->shader[1]);
 583         BuildVertexShader(vgl, &vgl->shader[2]);
 584
 585         /* Check shaders messages */
 586         for (unsigned j = 0; j < 3; j++) {
 587             int infoLength;
 588             vgl->GetShaderiv(vgl->shader[j], GL_INFO_LOG_LENGTH, &infoLength);
 589             if (infoLength <= 1)
 590                 continue;
 591
 592             char *infolog = malloc(infoLength);
 593             int charsWritten;
 594             vgl->GetShaderInfoLog(vgl->shader[j], infoLength, &charsWritten, infolog);
 595             fprintf(stderr, "shader %d: %s\n", j, infolog);
 596             free(infolog);
 597         }
 598
 599         vgl->program[0] = vgl->CreateProgram();
 600         vgl->AttachShader(vgl->program[0], vgl->shader[0]);
 601         vgl->AttachShader(vgl->program[0], vgl->shader[2]);
 602         vgl->LinkProgram(vgl->program[0]);
 603
 604         vgl->program[1] = vgl->CreateProgram();
 605         vgl->AttachShader(vgl->program[1], vgl->shader[1]);
 606         vgl->AttachShader(vgl->program[1], vgl->shader[2]);
 607         vgl->LinkProgram(vgl->program[1]);
 608
 609         /* Check program messages */
 610         for (GLuint i = 0; i < 2; i++) {
 611             int infoLength = 0;
 612             vgl->GetProgramiv(vgl->program[i], GL_INFO_LOG_LENGTH, &infoLength);
 613             if (infoLength <= 1)
 614                 continue;
 615             char *infolog = malloc(infoLength);
 616             int charsWritten;
 617             vgl->GetProgramInfoLog(vgl->program[i], infoLength, &charsWritten, infolog);
 618             fprintf(stderr, "shader program %d: %s\n", i, infolog);
 619             free(infolog);
 620
 621             /* If there is some message, better to check linking is ok */
 622             GLint link_status = GL_TRUE;
 623             vgl->GetProgramiv(vgl->program[i], GL_LINK_STATUS, &link_status);
 624             if (link_status == GL_FALSE) {
 625                 fprintf(stderr, "Unable to use program %d\n", i);
 626                 free(vgl);
 627                 return NULL;
 628             }
 629         }
 630 #else
 631         (void)yuv_range_correction;
 632 #endif
 633     }
 634
 635     /* */
 636     glDisable(GL_BLEND);
 637     glDisable(GL_DEPTH_TEST);
 638     glDepthMask(GL_FALSE);
 639     glDisable(GL_CULL_FACE);
 640     glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 641     glClear(GL_COLOR_BUFFER_BIT);
 642
 643     vlc_gl_Unlock(vgl->gl);
 644
 645     /* */
 646     for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
 647         for (int j = 0; j < PICTURE_PLANE_MAX; j++)
 648             vgl->texture[i][j] = 0;
 649     }
 650     vgl->region_count = 0;
 651     vgl->region = NULL;
 652     vgl->pool = NULL;
 653
 654     *fmt = vgl->fmt;
 655     if (subpicture_chromas) {
 656         *subpicture_chromas = gl_subpicture_chromas;
 657     }
 658     return vgl;
 659 }
 660
 661 void vout_display_opengl_Delete(vout_display_opengl_t *vgl)
 662 {
 663     /* */
 664     if (!vlc_gl_Lock(vgl->gl)) {
 665         glFinish();
 666         glFlush();
 667         for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++)
 668             glDeleteTextures(vgl->chroma->plane_count, vgl->texture[i]);
 669         for (int i = 0; i < vgl->region_count; i++) {
 670             if (vgl->region[i].texture)
 671                 glDeleteTextures(1, &vgl->region[i].texture);
 672         }
 673         free(vgl->region);
 674
 675 #ifdef SUPPORTS_SHADERS
 676         if (vgl->program[0]) {
 677             for (int i = 0; i < 2; i++)
 678                 vgl->DeleteProgram(vgl->program[i]);
 679             for (int i = 0; i < 3; i++)
 680                 vgl->DeleteShader(vgl->shader[i]);
 681         }
 682 #endif
 683
 684         free(vgl->texture_temp_buf);
 685         vlc_gl_Unlock(vgl->gl);
 686     }
 687     if (vgl->pool)
 688         picture_pool_Delete(vgl->pool);
 689     free(vgl);
 690 }
 691
 692 picture_pool_t *vout_display_opengl_GetPool(vout_display_opengl_t *vgl, unsigned requested_count)
 693 {
 694     if (vgl->pool)
 695         return vgl->pool;
 696
 697     /* Allocate our pictures */
 698     picture_t *picture[VLCGL_PICTURE_MAX] = {NULL, };
 699     unsigned count;
 700
 701     for (count = 0; count < __MIN(VLCGL_PICTURE_MAX, requested_count); count++) {
 702         picture[count] = picture_NewFromFormat(&vgl->fmt);
 703         if (!picture[count])
 704             break;
 705     }
 706     if (count <= 0)
 707         return NULL;
 708
 709     /* Wrap the pictures into a pool */
 710     picture_pool_configuration_t cfg;
 711     memset(&cfg, 0, sizeof(cfg));
 712     cfg.picture_count = count;
 713     cfg.picture       = picture;
 714     vgl->pool = picture_pool_NewExtended(&cfg);
 715     if (!vgl->pool)
 716         goto error;
 717
 718     /* Allocates our textures */
 719     if (vlc_gl_Lock(vgl->gl))
 720         return vgl->pool;
 721
 722     for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
 723         glGenTextures(vgl->chroma->plane_count, vgl->texture[i]);
 724         for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 725             if (vgl->use_multitexture) {
 726                 glActiveTexture(GL_TEXTURE0 + j);
 727                 glClientActiveTexture(GL_TEXTURE0 + j);
 728             }
 729             glBindTexture(vgl->tex_target, vgl->texture[i][j]);
 730
 731 #if !USE_OPENGL_ES
 732             /* Set the texture parameters */
 733             glTexParameterf(vgl->tex_target, GL_TEXTURE_PRIORITY, 1.0);
 734             glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 735 #endif
 736
 737             glTexParameteri(vgl->tex_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 738             glTexParameteri(vgl->tex_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 739             glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 740             glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 741
 742             /* Call glTexImage2D only once, and use glTexSubImage2D later */
 743             glTexImage2D(vgl->tex_target, 0,
 744                          vgl->tex_internal, vgl->tex_width[j], vgl->tex_height[j],
 745                          0, vgl->tex_format, vgl->tex_type, NULL);
 746         }
 747     }
 748
 749     vlc_gl_Unlock(vgl->gl);
 750
 751     return vgl->pool;
 752
 753 error:
 754     for (unsigned i = 0; i < count; i++)
 755         picture_Release(picture[i]);
 756     return NULL;
 757 }
 758
 759 #define ALIGN(x, y) (((x) + ((y) - 1)) & ~((y) - 1))
 760 static void Upload(vout_display_opengl_t *vgl, int in_width, int in_height,
 761                    int in_full_width, int in_full_height,
 762                    int w_num, int w_den, int h_num, int h_den,
 763                    int pitch, int pixel_pitch,
 764                    int full_upload, const uint8_t *pixels,
 765                    int tex_target, int tex_format, int tex_type)
 766 {
 767     int width       =       in_width * w_num / w_den;
 768     int full_width  =  in_full_width * w_num / w_den;
 769     int height      =      in_height * h_num / h_den;
 770     int full_height = in_full_height * h_num / h_den;
 771     // This unpack alignment is the default, but setting it just in case.
 772     glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
 773 #ifndef GL_UNPACK_ROW_LENGTH
 774     int dst_width = full_upload ? full_width : width;
 775     int dst_pitch = ALIGN(dst_width * pixel_pitch, 4);
 776     if ( pitch != dst_pitch )
 777     {
 778         int buf_size = dst_pitch * full_height * pixel_pitch;
 779         const uint8_t *source = pixels;
 780         uint8_t *destination;
 781         if( !vgl->texture_temp_buf || vgl->texture_temp_buf_size < buf_size )
 782         {
 783             free( vgl->texture_temp_buf );
 784             vgl->texture_temp_buf = xmalloc( buf_size );
 785             vgl->texture_temp_buf_size = buf_size;
 786         }
 787         destination = vgl->texture_temp_buf;
 788
 789         for( int h = 0; h < height ; h++ )
 790         {
 791             memcpy( destination, source, width * pixel_pitch );
 792             source += pitch;
 793             destination += dst_pitch;
 794         }
 795         if (full_upload)
 796             glTexImage2D( tex_target, 0, tex_format,
 797                           full_width, full_height,
 798                           0, tex_format, tex_type, vgl->texture_temp_buf );
 799         else
 800             glTexSubImage2D( tex_target, 0,
 801                              0, 0,
 802                              width, height,
 803                              tex_format, tex_type, vgl->texture_temp_buf );
 804     } else {
 805 #else
 806     (void) width;
 807     (void) height;
 808     (void) vgl;
 809     {
 810         glPixelStorei(GL_UNPACK_ROW_LENGTH, pitch / pixel_pitch);
 811 #endif
 812         if (full_upload)
 813             glTexImage2D(tex_target, 0, tex_format,
 814                          full_width, full_height,
 815                          0, tex_format, tex_type, pixels);
 816         else
 817             glTexSubImage2D(tex_target, 0,
 818                             0, 0,
 819                             width, height,
 820                             tex_format, tex_type, pixels);
 821     }
 822 }
 823
 824 int vout_display_opengl_Prepare(vout_display_opengl_t *vgl,
 825                                 picture_t *picture, subpicture_t *subpicture)
 826 {
 827     if (vlc_gl_Lock(vgl->gl))
 828         return VLC_EGENERIC;
 829
 830     /* Update the texture */
 831     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 832         if (vgl->use_multitexture) {
 833             glActiveTexture(GL_TEXTURE0 + j);
 834             glClientActiveTexture(GL_TEXTURE0 + j);
 835         }
 836         glBindTexture(vgl->tex_target, vgl->texture[0][j]);
 837
 838         Upload(vgl, picture->format.i_visible_width, vgl->fmt.i_visible_height,
 839                vgl->fmt.i_width, vgl->fmt.i_height,
 840                vgl->chroma->p[j].w.num, vgl->chroma->p[j].w.den, vgl->chroma->p[j].h.num, vgl->chroma->p[j].h.den,
 841                picture->p[j].i_pitch, picture->p[j].i_pixel_pitch, 0, picture->p[j].p_pixels, vgl->tex_target, vgl->tex_format, vgl->tex_type);
 842     }
 843
 844     int         last_count = vgl->region_count;
 845     gl_region_t *last = vgl->region;
 846
 847     vgl->region_count = 0;
 848     vgl->region       = NULL;
 849
 850     if (subpicture) {
 851
 852         int count = 0;
 853         for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next)
 854             count++;
 855
 856         vgl->region_count = count;
 857         vgl->region       = calloc(count, sizeof(*vgl->region));
 858
 859         if (vgl->use_multitexture) {
 860             glActiveTexture(GL_TEXTURE0 + 0);
 861             glClientActiveTexture(GL_TEXTURE0 + 0);
 862         }
 863         int i = 0;
 864         for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next, i++) {
 865             gl_region_t *glr = &vgl->region[i];
 866
 867             glr->format = GL_RGBA;
 868             glr->type   = GL_UNSIGNED_BYTE;
 869             glr->width  = r->fmt.i_visible_width;
 870             glr->height = r->fmt.i_visible_height;
 871             if (!vgl->supports_npot) {
 872                 glr->width  = GetAlignedSize(glr->width);
 873                 glr->height = GetAlignedSize(glr->height);
 874                 glr->tex_width  = (float) r->fmt.i_visible_width  / glr->width;
 875                 glr->tex_height = (float) r->fmt.i_visible_height / glr->height;
 876             } else {
 877                 glr->tex_width  = 1.0;
 878                 glr->tex_height = 1.0;
 879             }
 880             glr->alpha  = (float)subpicture->i_alpha * r->i_alpha / 255 / 255;
 881             glr->left   =  2.0 * (r->i_x                          ) / subpicture->i_original_picture_width  - 1.0;
 882             glr->top    = -2.0 * (r->i_y                          ) / subpicture->i_original_picture_height + 1.0;
 883             glr->right  =  2.0 * (r->i_x + r->fmt.i_visible_width ) / subpicture->i_original_picture_width  - 1.0;
 884             glr->bottom = -2.0 * (r->i_y + r->fmt.i_visible_height) / subpicture->i_original_picture_height + 1.0;
 885
 886             glr->texture = 0;
 887             for (int j = 0; j < last_count; j++) {
 888                 if (last[j].texture &&
 889                     last[j].width  == glr->width &&
 890                     last[j].height == glr->height &&
 891                     last[j].format == glr->format &&
 892                     last[j].type   == glr->type) {
 893                     glr->texture = last[j].texture;
 894                     memset(&last[j], 0, sizeof(last[j]));
 895                     break;
 896                 }
 897             }
 898
 899             const int pixels_offset = r->fmt.i_y_offset * r->p_picture->p->i_pitch +
 900                                       r->fmt.i_x_offset * r->p_picture->p->i_pixel_pitch;
 901             if (glr->texture) {
 902                 glBindTexture(GL_TEXTURE_2D, glr->texture);
 903                 Upload(vgl, r->fmt.i_visible_width, r->fmt.i_visible_height, glr->width, glr->height, 1, 1, 1, 1,
 904                        r->p_picture->p->i_pitch, r->p_picture->p->i_pixel_pitch, 0,
 905                        &r->p_picture->p->p_pixels[pixels_offset], GL_TEXTURE_2D, glr->format, glr->type);
 906             } else {
 907                 glGenTextures(1, &glr->texture);
 908                 glBindTexture(GL_TEXTURE_2D, glr->texture);
 909 #if !USE_OPENGL_ES
 910                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_PRIORITY, 1.0);
 911                 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 912 #endif
 913                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 914                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 915                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 916                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 917                 Upload(vgl, r->fmt.i_visible_width, r->fmt.i_visible_height, glr->width, glr->height, 1, 1, 1, 1,
 918                        r->p_picture->p->i_pitch, r->p_picture->p->i_pixel_pitch, 1,
 919                        &r->p_picture->p->p_pixels[pixels_offset], GL_TEXTURE_2D, glr->format, glr->type);
 920             }
 921         }
 922     }
 923     for (int i = 0; i < last_count; i++) {
 924         if (last[i].texture)
 925             glDeleteTextures(1, &last[i].texture);
 926     }
 927     free(last);
 928
 929     vlc_gl_Unlock(vgl->gl);
 930     VLC_UNUSED(subpicture);
 931     return VLC_SUCCESS;
 932 }
 933
 934 #ifdef SUPPORTS_FIXED_PIPELINE
 935 static void DrawWithoutShaders(vout_display_opengl_t *vgl,
 936                                float *left, float *top, float *right, float *bottom)
 937 {
 938     static const GLfloat vertexCoord[] = {
 939         -1.0f, -1.0f,
 940          1.0f, -1.0f,
 941         -1.0f,  1.0f,
 942          1.0f,  1.0f,
 943     };
 944
 945     const GLfloat textureCoord[] = {
 946         left[0],  bottom[0],
 947         right[0], bottom[0],
 948         left[0],  top[0],
 949         right[0], top[0]
 950     };
 951
 952     glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
 953     glEnable(vgl->tex_target);
 954     glActiveTexture(GL_TEXTURE0 + 0);
 955     glClientActiveTexture(GL_TEXTURE0 + 0);
 956
 957     glBindTexture(vgl->tex_target, vgl->texture[0][0]);
 958
 959     glEnableClientState(GL_VERTEX_ARRAY);
 960     glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 961
 962     glTexCoordPointer(2, GL_FLOAT, 0, textureCoord);
 963     glVertexPointer(2, GL_FLOAT, 0, vertexCoord);
 964
 965     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 966
 967     glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 968     glDisableClientState(GL_VERTEX_ARRAY);
 969     glDisable(vgl->tex_target);
 970 }
 971 #endif
 972
 973 #ifdef SUPPORTS_SHADERS
 974 static void DrawWithShaders(vout_display_opengl_t *vgl,
 975                             float *left, float *top, float *right, float *bottom,
 976                             int program)
 977 {
 978     vgl->UseProgram(vgl->program[program]);
 979     if (program == 0) {
 980         if (vgl->chroma->plane_count == 3) {
 981             vgl->Uniform4fv(vgl->GetUniformLocation(vgl->program[0], "Coefficient"), 4, vgl->local_value);
 982             vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture0"), 0);
 983             vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture1"), 1);
 984             vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture2"), 2);
 985         }
 986         else if (vgl->chroma->plane_count == 1) {
 987             vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture0"), 0);
 988         }
 989     } else {
 990         vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[1], "Texture0"), 0);
 991         vgl->Uniform4f(vgl->GetUniformLocation(vgl->program[1], "FillColor"), 1.0f, 1.0f, 1.0f, 1.0f);
 992     }
 993
 994     static const GLfloat vertexCoord[] = {
 995         -1.0,  1.0,
 996         -1.0, -1.0,
 997          1.0,  1.0,
 998          1.0, -1.0,
 999     };
1000
1001     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
1002         const GLfloat textureCoord[] = {
1003             left[j],  top[j],
1004             left[j],  bottom[j],
1005             right[j], top[j],
1006             right[j], bottom[j],
1007         };
1008         glActiveTexture(GL_TEXTURE0+j);
1009         glClientActiveTexture(GL_TEXTURE0+j);
1010         glBindTexture(vgl->tex_target, vgl->texture[0][j]);
1011
1012         char attribute[20];
1013         snprintf(attribute, sizeof(attribute), "MultiTexCoord%1d", j);
1014         vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[program], attribute));
1015         vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[program], attribute), 2, GL_FLOAT, 0, 0, textureCoord);
1016     }
1017     glActiveTexture(GL_TEXTURE0 + 0);
1018     glClientActiveTexture(GL_TEXTURE0 + 0);
1019     vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[program], "VertexPosition"));
1020     vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[program], "VertexPosition"), 2, GL_FLOAT, 0, 0, vertexCoord);
1021
1022     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
1023 }
1024 #endif
1025
1026 int vout_display_opengl_Display(vout_display_opengl_t *vgl,
1027                                 const video_format_t *source)
1028 {
1029     if (vlc_gl_Lock(vgl->gl))
1030         return VLC_EGENERIC;
1031
1032     /* Why drawing here and not in Render()? Because this way, the
1033        OpenGL providers can call vout_display_opengl_Display to force redraw.i
1034        Currently, the OS X provider uses it to get a smooth window resizing */
1035     glClear(GL_COLOR_BUFFER_BIT);
1036
1037     /* Draw the picture */
1038     float left[PICTURE_PLANE_MAX];
1039     float top[PICTURE_PLANE_MAX];
1040     float right[PICTURE_PLANE_MAX];
1041     float bottom[PICTURE_PLANE_MAX];
1042     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
1043         /* glTexCoord works differently with GL_TEXTURE_2D and
1044            GL_TEXTURE_RECTANGLE_EXT */
1045         float scale_w, scale_h;
1046
1047         if (vgl->tex_target == GL_TEXTURE_2D) {
1048             scale_w = (float)vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den / vgl->tex_width[j];
1049             scale_h = (float)vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den / vgl->tex_height[j];
1050
1051         } else {
1052             scale_w = 1.0;
1053             scale_h = 1.0;
1054         }
1055         left[j]   = (source->i_x_offset +                       0 ) * scale_w;
1056         top[j]    = (source->i_y_offset +                       0 ) * scale_h;
1057         right[j]  = (source->i_x_offset + source->i_visible_width ) * scale_w;
1058         bottom[j] = (source->i_y_offset + source->i_visible_height) * scale_h;
1059     }
1060
1061 #ifdef SUPPORTS_SHADERS
1062     if (vgl->program[0] && (vgl->chroma->plane_count == 3 || vgl->chroma->plane_count == 1))
1063         DrawWithShaders(vgl, left, top, right, bottom, 0);
1064     else if (vgl->program[1] && vgl->chroma->plane_count == 1)
1065         DrawWithShaders(vgl, left, top, right, bottom, 1);
1066     else
1067 #endif
1068     {
1069 #ifdef SUPPORTS_FIXED_PIPELINE
1070         DrawWithoutShaders(vgl, left, top, right, bottom);
1071 #endif
1072     }
1073
1074     /* Draw the subpictures */
1075     if (vgl->program[1]) {
1076 #ifdef SUPPORTS_SHADERS
1077         // Change the program for overlays
1078         vgl->UseProgram(vgl->program[1]);
1079         vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[1], "Texture"), 0);
1080 #endif
1081     }
1082
1083 #ifdef SUPPORTS_FIXED_PIPELINE
1084     glEnable(GL_TEXTURE_2D);
1085 #endif
1086     glEnable(GL_BLEND);
1087     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1088
1089     glActiveTexture(GL_TEXTURE0 + 0);
1090     glClientActiveTexture(GL_TEXTURE0 + 0);
1091     for (int i = 0; i < vgl->region_count; i++) {
1092         gl_region_t *glr = &vgl->region[i];
1093         const GLfloat vertexCoord[] = {
1094             glr->left,  glr->top,
1095             glr->left,  glr->bottom,
1096             glr->right, glr->top,
1097             glr->right, glr->bottom,
1098         };
1099         const GLfloat textureCoord[] = {
1100             0.0, 0.0,
1101             0.0, glr->tex_height,
1102             glr->tex_width, 0.0,
1103             glr->tex_width, glr->tex_height,
1104         };
1105
1106         glBindTexture(GL_TEXTURE_2D, glr->texture);
1107         if (vgl->program[1]) {
1108 #ifdef SUPPORTS_SHADERS
1109             vgl->Uniform4f(vgl->GetUniformLocation(vgl->program[1], "FillColor"), 1.0f, 1.0f, 1.0f, glr->alpha);
1110             vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[1], "MultiTexCoord0"));
1111             vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[1], "MultiTexCoord0"), 2, GL_FLOAT, 0, 0, textureCoord);
1112             vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[1], "VertexPosition"));
1113             vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[1], "VertexPosition"), 2, GL_FLOAT, 0, 0, vertexCoord);
1114 #endif
1115         } else {
1116 #ifdef SUPPORTS_FIXED_PIPELINE
1117             glEnableClientState(GL_VERTEX_ARRAY);
1118             glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1119             glColor4f(1.0f, 1.0f, 1.0f, glr->alpha);
1120             glTexCoordPointer(2, GL_FLOAT, 0, textureCoord);
1121             glVertexPointer(2, GL_FLOAT, 0, vertexCoord);
1122 #endif
1123         }
1124
1125         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
1126
1127         if (!vgl->program[1]) {
1128 #ifdef SUPPORTS_FIXED_PIPELINE
1129             glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1130             glDisableClientState(GL_VERTEX_ARRAY);
1131 #endif
1132         }
1133     }
1134     glDisable(GL_BLEND);
1135 #ifdef SUPPORTS_FIXED_PIPELINE
1136     glDisable(GL_TEXTURE_2D);
1137 #endif
1138
1139     /* Display */
1140     vlc_gl_Swap(vgl->gl);
1141
1142     vlc_gl_Unlock(vgl->gl);
1143     return VLC_SUCCESS;
1144 }
1145