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 #if defined(_WIN32)
 174     PFNGLACTIVETEXTUREPROC  ActiveTexture;
 175     PFNGLCLIENTACTIVETEXTUREPROC  ClientActiveTexture;
 176 #endif
 177
 178
 179     /* multitexture */
 180     bool use_multitexture;
 181
 182     /* Non-power-of-2 texture size support */
 183     bool supports_npot;
 184
 185     uint8_t *texture_temp_buf;
 186     int      texture_temp_buf_size;
 187 };
 188
 189 static inline int GetAlignedSize(unsigned size)
 190 {
 191     /* Return the smallest larger or equal power of 2 */
 192     unsigned align = 1 << (8 * sizeof (unsigned) - clz(size));
 193     return ((align >> 1) == size) ? size : align;
 194 }
 195
 196 #if !USE_OPENGL_ES
 197 static bool IsLuminance16Supported(int target)
 198 {
 199     GLuint texture;
 200
 201     glGenTextures(1, &texture);
 202     glBindTexture(target, texture);
 203     glTexImage2D(target, 0, GL_LUMINANCE16,
 204                  64, 64, 0, GL_LUMINANCE, GL_UNSIGNED_SHORT, NULL);
 205     GLint size = 0;
 206     glGetTexLevelParameteriv(target, 0, GL_TEXTURE_LUMINANCE_SIZE, &size);
 207
 208     glDeleteTextures(1, &texture);
 209
 210     return size == 16;
 211 }
 212 #endif
 213
 214 #ifdef SUPPORTS_SHADERS
 215 static void BuildVertexShader(vout_display_opengl_t *vgl,
 216                               GLint *shader)
 217 {
 218     /* Basic vertex shader */
 219     const char *vertexShader =
 220         "#version " GLSL_VERSION "\n"
 221         PRECISION
 222         "varying vec4 TexCoord0,TexCoord1, TexCoord2;"
 223         "attribute vec4 MultiTexCoord0,MultiTexCoord1,MultiTexCoord2;"
 224         "attribute vec4 VertexPosition;"
 225         "void main() {"
 226         " TexCoord0 = MultiTexCoord0;"
 227         " TexCoord1 = MultiTexCoord1;"
 228         " TexCoord2 = MultiTexCoord2;"
 229         " gl_Position = VertexPosition;"
 230         "}";
 231
 232     *shader = vgl->CreateShader(GL_VERTEX_SHADER);
 233     vgl->ShaderSource(*shader, 1, &vertexShader, NULL);
 234     vgl->CompileShader(*shader);
 235 }
 236
 237 static void BuildYUVFragmentShader(vout_display_opengl_t *vgl,
 238                                    GLint *shader,
 239                                    int *local_count,
 240                                    GLfloat *local_value,
 241                                    const video_format_t *fmt,
 242                                    float yuv_range_correction)
 243
 244 {
 245     /* [R/G/B][Y U V O] from TV range to full range
 246      * XXX we could also do hue/brightness/constrast/gamma
 247      * by simply changing the coefficients
 248      */
 249     const float matrix_bt601_tv2full[12] = {
 250         1.164383561643836,  0.0000,             1.596026785714286, -0.874202217873451 ,
 251         1.164383561643836, -0.391762290094914, -0.812967647237771,  0.531667823499146 ,
 252         1.164383561643836,  2.017232142857142,  0.0000,            -1.085630789302022 ,
 253     };
 254     const float matrix_bt709_tv2full[12] = {
 255         1.164383561643836,  0.0000,             1.792741071428571, -0.972945075016308 ,
 256         1.164383561643836, -0.21324861427373,  -0.532909328559444,  0.301482665475862 ,
 257         1.164383561643836,  2.112401785714286,  0.0000,            -1.133402217873451 ,
 258     };
 259     const float (*matrix) = fmt->i_height > 576 ? matrix_bt709_tv2full
 260                                                 : matrix_bt601_tv2full;
 261
 262     /* Basic linear YUV -> RGB conversion using bilinear interpolation */
 263     const char *template_glsl_yuv =
 264         "#version " GLSL_VERSION "\n"
 265         PRECISION
 266         "uniform sampler2D Texture0;"
 267         "uniform sampler2D Texture1;"
 268         "uniform sampler2D Texture2;"
 269         "uniform vec4      Coefficient[4];"
 270         "varying vec4      TexCoord0,TexCoord1,TexCoord2;"
 271
 272         "void main(void) {"
 273         " vec4 x,y,z,result;"
 274         " x  = texture2D(Texture0, TexCoord0.st);"
 275         " %c = texture2D(Texture1, TexCoord1.st);"
 276         " %c = texture2D(Texture2, TexCoord2.st);"
 277
 278         " result = x * Coefficient[0] + Coefficient[3];"
 279         " result = (y * Coefficient[1]) + result;"
 280         " result = (z * Coefficient[2]) + result;"
 281         " gl_FragColor = result;"
 282         "}";
 283     bool swap_uv = fmt->i_chroma == VLC_CODEC_YV12 ||
 284                    fmt->i_chroma == VLC_CODEC_YV9;
 285
 286     char *code;
 287     if (asprintf(&code, template_glsl_yuv,
 288                  swap_uv ? 'z' : 'y',
 289                  swap_uv ? 'y' : 'z') < 0)
 290         code = NULL;
 291
 292     for (int i = 0; i < 4; i++) {
 293         float correction = i < 3 ? yuv_range_correction : 1.0;
 294         /* We place coefficient values for coefficient[4] in one array from matrix values.
 295            Notice that we fill values from top down instead of left to right.*/
 296         for (int j = 0; j < 4; j++)
 297             local_value[*local_count + i*4+j] = j < 3 ? correction * matrix[j*4+i]
 298                                                       : 0.0 ;
 299     }
 300     (*local_count) += 4;
 301
 302
 303     *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
 304     vgl->ShaderSource(*shader, 1, (const char **)&code, NULL);
 305     vgl->CompileShader(*shader);
 306
 307     free(code);
 308 }
 309
 310 #if 0
 311 static void BuildRGBFragmentShader(vout_display_opengl_t *vgl,
 312                                    GLint *shader)
 313 {
 314     // Simple shader for RGB
 315     const char *code =
 316         "#version " GLSL_VERSION "\n"
 317         PRECISION
 318         "uniform sampler2D Texture[3];"
 319         "varying vec4 TexCoord0,TexCoord1,TexCoord2;"
 320         "void main()"
 321         "{ "
 322         "  gl_FragColor = texture2D(Texture[0], TexCoord0.st);"
 323         "}";
 324     *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
 325     vgl->ShaderSource(*shader, 1, &code, NULL);
 326     vgl->CompileShader(*shader);
 327 }
 328 #endif
 329
 330 static void BuildRGBAFragmentShader(vout_display_opengl_t *vgl,
 331                                    GLint *shader)
 332 {
 333     // Simple shader for RGBA
 334     const char *code =
 335         "#version " GLSL_VERSION "\n"
 336         PRECISION
 337         "uniform sampler2D Texture;"
 338         "uniform vec4 FillColor;"
 339         "varying vec4 TexCoord0;"
 340         "void main()"
 341         "{ "
 342         "  gl_FragColor = texture2D(Texture, TexCoord0.st) * FillColor;"
 343         "}";
 344     *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
 345     vgl->ShaderSource(*shader, 1, &code, NULL);
 346     vgl->CompileShader(*shader);
 347 }
 348
 349 static void BuildXYZFragmentShader(vout_display_opengl_t *vgl,
 350                                    GLint *shader)
 351 {
 352     /* Shader for XYZ to RGB correction
 353      * 3 steps :
 354      *  - XYZ gamma correction
 355      *  - XYZ to RGB matrix conversion
 356      *  - reverse RGB gamma correction
 357      */
 358       const char *code =
 359         "#version " GLSL_VERSION "\n"
 360         PRECISION
 361         "uniform sampler2D Texture0;"
 362         "uniform vec4 xyz_gamma = vec4(2.6);"
 363         "uniform vec4 rgb_gamma = vec4(1.0/2.2);"
 364         // WARN: matrix Is filled column by column (not row !)
 365         "uniform mat4 matrix_xyz_rgb = mat4("
 366         "    3.240454 , -0.9692660, 0.0556434, 0.0,"
 367         "   -1.5371385,  1.8760108, -0.2040259, 0.0,"
 368         "    -0.4985314, 0.0415560, 1.0572252,  0.0,"
 369         "    0.0,      0.0,         0.0,        1.0 "
 370         " );"
 371
 372         "varying vec4 TexCoord0;"
 373         "void main()"
 374         "{ "
 375         " vec4 v_in, v_out;"
 376         " v_in  = texture2D(Texture0, TexCoord0.st);"
 377         " v_in = pow(v_in, xyz_gamma);"
 378         " v_out = matrix_xyz_rgb * v_in ;"
 379         " v_out = pow(v_out, rgb_gamma) ;"
 380         " v_out = clamp(v_out, 0.0, 1.0) ;"
 381         " gl_FragColor = v_out;"
 382         "}";
 383     *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
 384     vgl->ShaderSource(*shader, 1, &code, NULL);
 385     vgl->CompileShader(*shader);
 386 }
 387
 388 #endif
 389
 390 vout_display_opengl_t *vout_display_opengl_New(video_format_t *fmt,
 391                                                const vlc_fourcc_t **subpicture_chromas,
 392                                                vlc_gl_t *gl)
 393 {
 394     vout_display_opengl_t *vgl = calloc(1, sizeof(*vgl));
 395     if (!vgl)
 396         return NULL;
 397
 398     vgl->gl = gl;
 399     if (vlc_gl_Lock(vgl->gl)) {
 400         free(vgl);
 401         return NULL;
 402     }
 403
 404     if (vgl->gl->getProcAddress == NULL) {
 405         fprintf(stderr, "getProcAddress not implemented, bailing out\n");
 406         free(vgl);
 407         return NULL;
 408     }
 409
 410     const char *extensions = (const char *)glGetString(GL_EXTENSIONS);
 411 #if !USE_OPENGL_ES
 412     const unsigned char *ogl_version = glGetString(GL_VERSION);
 413     bool supports_shaders = strverscmp((const char *)ogl_version, "2.0") >= 0;
 414 #else
 415     bool supports_shaders = false;
 416 #endif
 417
 418 #if USE_OPENGL_ES == 2
 419     vgl->CreateShader  = glCreateShader;
 420     vgl->ShaderSource  = glShaderSource;
 421     vgl->CompileShader = glCompileShader;
 422     vgl->AttachShader  = glAttachShader;
 423
 424     vgl->GetProgramiv  = glGetProgramiv;
 425     vgl->GetShaderiv   = glGetShaderiv;
 426     vgl->GetProgramInfoLog  = glGetProgramInfoLog;
 427     vgl->GetShaderInfoLog   = glGetShaderInfoLog;
 428
 429     vgl->DeleteShader  = glDeleteShader;
 430
 431     vgl->GetUniformLocation = glGetUniformLocation;
 432     vgl->GetAttribLocation  = glGetAttribLocation;
 433     vgl->VertexAttribPointer= glVertexAttribPointer;
 434     vgl->EnableVertexAttribArray = glEnableVertexAttribArray;
 435     vgl->Uniform4fv    = glUniform4fv;
 436     vgl->Uniform4f     = glUniform4f;
 437     vgl->Uniform1i     = glUniform1i;
 438
 439     vgl->CreateProgram = glCreateProgram;
 440     vgl->LinkProgram   = glLinkProgram;
 441     vgl->UseProgram    = glUseProgram;
 442     vgl->DeleteProgram = glDeleteProgram;
 443     supports_shaders = true;
 444 #elif defined(SUPPORTS_SHADERS)
 445     vgl->CreateShader  = (PFNGLCREATESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glCreateShader");
 446     vgl->ShaderSource  = (PFNGLSHADERSOURCEPROC)vlc_gl_GetProcAddress(vgl->gl, "glShaderSource");
 447     vgl->CompileShader = (PFNGLCOMPILESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glCompileShader");
 448     vgl->AttachShader  = (PFNGLATTACHSHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glAttachShader");
 449
 450     vgl->GetProgramiv  = (PFNGLGETPROGRAMIVPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetProgramiv");
 451     vgl->GetShaderiv   = (PFNGLGETSHADERIVPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetShaderiv");
 452     vgl->GetProgramInfoLog  = (PFNGLGETPROGRAMINFOLOGPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetProgramInfoLog");
 453     vgl->GetShaderInfoLog   = (PFNGLGETSHADERINFOLOGPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetShaderInfoLog");
 454
 455     vgl->DeleteShader  = (PFNGLDELETESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteShader");
 456
 457     vgl->GetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetUniformLocation");
 458     vgl->GetAttribLocation  = (PFNGLGETATTRIBLOCATIONPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetAttribLocation");
 459     vgl->VertexAttribPointer= (PFNGLVERTEXATTRIBPOINTERPROC)vlc_gl_GetProcAddress(vgl->gl, "glVertexAttribPointer");
 460     vgl->EnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)vlc_gl_GetProcAddress(vgl->gl, "glEnableVertexAttribArray");
 461     vgl->Uniform4fv    = (PFNGLUNIFORM4FVPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform4fv");
 462     vgl->Uniform4f     = (PFNGLUNIFORM4FPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform4f");
 463     vgl->Uniform1i     = (PFNGLUNIFORM1IPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform1i");
 464
 465     vgl->CreateProgram = (PFNGLCREATEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glCreateProgram");
 466     vgl->LinkProgram   = (PFNGLLINKPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glLinkProgram");
 467     vgl->UseProgram    = (PFNGLUSEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glUseProgram");
 468     vgl->DeleteProgram = (PFNGLDELETEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteProgram");
 469
 470     if (!vgl->CreateShader || !vgl->ShaderSource || !vgl->CreateProgram)
 471         supports_shaders = false;
 472 #endif
 473
 474 #if defined(_WIN32)
 475     vgl->ActiveTexture = (PFNGLACTIVETEXTUREPROC)vlc_gl_GetProcAddress(vgl->gl, "glActiveTexture");
 476     vgl->ClientActiveTexture = (PFNGLCLIENTACTIVETEXTUREPROC)vlc_gl_GetProcAddress(vgl->gl, "glClientActiveTexture");
 477 #   define glActiveTexture vgl->ActiveTexture
 478 #   define glClientActiveTexture vgl->ClientActiveTexture
 479 #endif
 480
 481     vgl->supports_npot = HasExtension(extensions, "GL_ARB_texture_non_power_of_two") ||
 482                          HasExtension(extensions, "GL_APPLE_texture_2D_limited_npot");
 483
 484 #if USE_OPENGL_ES == 2
 485     /* OpenGL ES 2 includes support for non-power of 2 textures by specification
 486      * so checks for extensions are bound to fail. Check for OpenGL ES version instead. */
 487     vgl->supports_npot = true;
 488 #endif
 489
 490     GLint max_texture_units = 0;
 491     glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_texture_units);
 492
 493 #ifdef __APPLE__
 494 #if USE_OPENGL_ES
 495     /* work-around an iOS 6 bug */
 496     if (kCFCoreFoundationVersionNumber >= 786.)
 497         max_texture_units = 8;
 498     supports_shaders = true;
 499 #endif
 500 #endif
 501
 502     /* Initialize with default chroma */
 503     vgl->fmt = *fmt;
 504     vgl->fmt.i_chroma = VLC_CODEC_RGB32;
 505 #   if defined(WORDS_BIGENDIAN)
 506     vgl->fmt.i_rmask  = 0xff000000;
 507     vgl->fmt.i_gmask  = 0x00ff0000;
 508     vgl->fmt.i_bmask  = 0x0000ff00;
 509 #   else
 510     vgl->fmt.i_rmask  = 0x000000ff;
 511     vgl->fmt.i_gmask  = 0x0000ff00;
 512     vgl->fmt.i_bmask  = 0x00ff0000;
 513 #   endif
 514     vgl->tex_target   = GL_TEXTURE_2D;
 515     vgl->tex_format   = GL_RGBA;
 516     vgl->tex_internal = GL_RGBA;
 517     vgl->tex_type     = GL_UNSIGNED_BYTE;
 518     /* Use YUV if possible and needed */
 519     bool need_fs_yuv = false;
 520     bool need_fs_xyz = false;
 521     bool need_fs_rgba = USE_OPENGL_ES == 2;
 522     float yuv_range_correction = 1.0;
 523
 524     if (max_texture_units >= 3 && supports_shaders && vlc_fourcc_IsYUV(fmt->i_chroma)) {
 525         const vlc_fourcc_t *list = vlc_fourcc_GetYUVFallback(fmt->i_chroma);
 526         while (*list) {
 527             const vlc_chroma_description_t *dsc = vlc_fourcc_GetChromaDescription(*list);
 528             if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 1) {
 529                 need_fs_yuv       = true;
 530                 vgl->fmt          = *fmt;
 531                 vgl->fmt.i_chroma = *list;
 532                 vgl->tex_format   = GL_LUMINANCE;
 533                 vgl->tex_internal = GL_LUMINANCE;
 534                 vgl->tex_type     = GL_UNSIGNED_BYTE;
 535                 yuv_range_correction = 1.0;
 536                 break;
 537 #if !USE_OPENGL_ES
 538             } else if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 2 &&
 539                        IsLuminance16Supported(vgl->tex_target)) {
 540                 need_fs_yuv       = true;
 541                 vgl->fmt          = *fmt;
 542                 vgl->fmt.i_chroma = *list;
 543                 vgl->tex_format   = GL_LUMINANCE;
 544                 vgl->tex_internal = GL_LUMINANCE16;
 545                 vgl->tex_type     = GL_UNSIGNED_SHORT;
 546                 yuv_range_correction = (float)((1 << 16) - 1) / ((1 << dsc->pixel_bits) - 1);
 547                 break;
 548 #endif
 549             }
 550             list++;
 551         }
 552     }
 553
 554     if (fmt->i_chroma == VLC_CODEC_XYZ12) {
 555         vlc_fourcc_GetChromaDescription(fmt->i_chroma);
 556         need_fs_xyz       = true;
 557         vgl->fmt          = *fmt;
 558         vgl->fmt.i_chroma = VLC_CODEC_XYZ12;
 559         vgl->tex_format   = GL_RGB;
 560         vgl->tex_internal = GL_RGB;
 561         vgl->tex_type     = GL_UNSIGNED_SHORT;
 562     }
 563     vgl->chroma = vlc_fourcc_GetChromaDescription(vgl->fmt.i_chroma);
 564     vgl->use_multitexture = vgl->chroma->plane_count > 1;
 565
 566     /* Texture size */
 567     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 568         int w = vgl->fmt.i_visible_width  * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den;
 569         int h = vgl->fmt.i_visible_height * vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den;
 570         if (vgl->supports_npot) {
 571             vgl->tex_width[j]  = w;
 572             vgl->tex_height[j] = h;
 573         } else {
 574             vgl->tex_width[j]  = GetAlignedSize(w);
 575             vgl->tex_height[j] = GetAlignedSize(h);
 576         }
 577     }
 578
 579     /* Build program if needed */
 580     vgl->program[0] =
 581     vgl->program[1] = 0;
 582     vgl->shader[0] =
 583     vgl->shader[1] =
 584     vgl->shader[2] = -1;
 585     vgl->local_count = 0;
 586     if (supports_shaders && (need_fs_yuv || need_fs_xyz|| need_fs_rgba)) {
 587 #ifdef SUPPORTS_SHADERS
 588         if (need_fs_xyz)
 589             BuildXYZFragmentShader(vgl, &vgl->shader[0]);
 590         else
 591             BuildYUVFragmentShader(vgl, &vgl->shader[0], &vgl->local_count,
 592                                 vgl->local_value, fmt, yuv_range_correction);
 593
 594         BuildRGBAFragmentShader(vgl, &vgl->shader[1]);
 595         BuildVertexShader(vgl, &vgl->shader[2]);
 596
 597         /* Check shaders messages */
 598         for (unsigned j = 0; j < 3; j++) {
 599             int infoLength;
 600             vgl->GetShaderiv(vgl->shader[j], GL_INFO_LOG_LENGTH, &infoLength);
 601             if (infoLength <= 1)
 602                 continue;
 603
 604             char *infolog = malloc(infoLength);
 605             int charsWritten;
 606             vgl->GetShaderInfoLog(vgl->shader[j], infoLength, &charsWritten, infolog);
 607             fprintf(stderr, "shader %d: %s\n", j, infolog);
 608             free(infolog);
 609         }
 610
 611         vgl->program[0] = vgl->CreateProgram();
 612         vgl->AttachShader(vgl->program[0], vgl->shader[0]);
 613         vgl->AttachShader(vgl->program[0], vgl->shader[2]);
 614         vgl->LinkProgram(vgl->program[0]);
 615
 616         vgl->program[1] = vgl->CreateProgram();
 617         vgl->AttachShader(vgl->program[1], vgl->shader[1]);
 618         vgl->AttachShader(vgl->program[1], vgl->shader[2]);
 619         vgl->LinkProgram(vgl->program[1]);
 620
 621         /* Check program messages */
 622         for (GLuint i = 0; i < 2; i++) {
 623             int infoLength = 0;
 624             vgl->GetProgramiv(vgl->program[i], GL_INFO_LOG_LENGTH, &infoLength);
 625             if (infoLength <= 1)
 626                 continue;
 627             char *infolog = malloc(infoLength);
 628             int charsWritten;
 629             vgl->GetProgramInfoLog(vgl->program[i], infoLength, &charsWritten, infolog);
 630             fprintf(stderr, "shader program %d: %s\n", i, infolog);
 631             free(infolog);
 632
 633             /* If there is some message, better to check linking is ok */
 634             GLint link_status = GL_TRUE;
 635             vgl->GetProgramiv(vgl->program[i], GL_LINK_STATUS, &link_status);
 636             if (link_status == GL_FALSE) {
 637                 fprintf(stderr, "Unable to use program %d\n", i);
 638                 free(vgl);
 639                 return NULL;
 640             }
 641         }
 642 #else
 643         (void)yuv_range_correction;
 644 #endif
 645     }
 646
 647     /* */
 648     glDisable(GL_BLEND);
 649     glDisable(GL_DEPTH_TEST);
 650     glDepthMask(GL_FALSE);
 651     glDisable(GL_CULL_FACE);
 652     glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 653     glClear(GL_COLOR_BUFFER_BIT);
 654
 655     vlc_gl_Unlock(vgl->gl);
 656
 657     /* */
 658     for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
 659         for (int j = 0; j < PICTURE_PLANE_MAX; j++)
 660             vgl->texture[i][j] = 0;
 661     }
 662     vgl->region_count = 0;
 663     vgl->region = NULL;
 664     vgl->pool = NULL;
 665
 666     *fmt = vgl->fmt;
 667     if (subpicture_chromas) {
 668         *subpicture_chromas = gl_subpicture_chromas;
 669     }
 670     return vgl;
 671 }
 672
 673 void vout_display_opengl_Delete(vout_display_opengl_t *vgl)
 674 {
 675     /* */
 676     if (!vlc_gl_Lock(vgl->gl)) {
 677         glFinish();
 678         glFlush();
 679         for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++)
 680             glDeleteTextures(vgl->chroma->plane_count, vgl->texture[i]);
 681         for (int i = 0; i < vgl->region_count; i++) {
 682             if (vgl->region[i].texture)
 683                 glDeleteTextures(1, &vgl->region[i].texture);
 684         }
 685         free(vgl->region);
 686
 687 #ifdef SUPPORTS_SHADERS
 688         if (vgl->program[0]) {
 689             for (int i = 0; i < 2; i++)
 690                 vgl->DeleteProgram(vgl->program[i]);
 691             for (int i = 0; i < 3; i++)
 692                 vgl->DeleteShader(vgl->shader[i]);
 693         }
 694 #endif
 695
 696         free(vgl->texture_temp_buf);
 697         vlc_gl_Unlock(vgl->gl);
 698     }
 699     if (vgl->pool)
 700         picture_pool_Delete(vgl->pool);
 701     free(vgl);
 702 }
 703
 704 picture_pool_t *vout_display_opengl_GetPool(vout_display_opengl_t *vgl, unsigned requested_count)
 705 {
 706     if (vgl->pool)
 707         return vgl->pool;
 708
 709     /* Allocate our pictures */
 710     picture_t *picture[VLCGL_PICTURE_MAX] = {NULL, };
 711     unsigned count;
 712
 713     for (count = 0; count < __MIN(VLCGL_PICTURE_MAX, requested_count); count++) {
 714         picture[count] = picture_NewFromFormat(&vgl->fmt);
 715         if (!picture[count])
 716             break;
 717     }
 718     if (count <= 0)
 719         return NULL;
 720
 721     /* Wrap the pictures into a pool */
 722     picture_pool_configuration_t cfg;
 723     memset(&cfg, 0, sizeof(cfg));
 724     cfg.picture_count = count;
 725     cfg.picture       = picture;
 726     vgl->pool = picture_pool_NewExtended(&cfg);
 727     if (!vgl->pool)
 728         goto error;
 729
 730     /* Allocates our textures */
 731     if (vlc_gl_Lock(vgl->gl))
 732         return vgl->pool;
 733
 734     for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
 735         glGenTextures(vgl->chroma->plane_count, vgl->texture[i]);
 736         for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 737             if (vgl->use_multitexture) {
 738                 glActiveTexture(GL_TEXTURE0 + j);
 739                 glClientActiveTexture(GL_TEXTURE0 + j);
 740             }
 741             glBindTexture(vgl->tex_target, vgl->texture[i][j]);
 742
 743 #if !USE_OPENGL_ES
 744             /* Set the texture parameters */
 745             glTexParameterf(vgl->tex_target, GL_TEXTURE_PRIORITY, 1.0);
 746             glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 747 #endif
 748
 749             glTexParameteri(vgl->tex_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 750             glTexParameteri(vgl->tex_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 751             glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 752             glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 753
 754             /* Call glTexImage2D only once, and use glTexSubImage2D later */
 755             glTexImage2D(vgl->tex_target, 0,
 756                          vgl->tex_internal, vgl->tex_width[j], vgl->tex_height[j],
 757                          0, vgl->tex_format, vgl->tex_type, NULL);
 758         }
 759     }
 760
 761     vlc_gl_Unlock(vgl->gl);
 762
 763     return vgl->pool;
 764
 765 error:
 766     for (unsigned i = 0; i < count; i++)
 767         picture_Release(picture[i]);
 768     return NULL;
 769 }
 770
 771 #define ALIGN(x, y) (((x) + ((y) - 1)) & ~((y) - 1))
 772 static void Upload(vout_display_opengl_t *vgl, int in_width, int in_height,
 773                    int in_full_width, int in_full_height,
 774                    int w_num, int w_den, int h_num, int h_den,
 775                    int pitch, int pixel_pitch,
 776                    int full_upload, const uint8_t *pixels,
 777                    int tex_target, int tex_format, int tex_type)
 778 {
 779     int width       =       in_width * w_num / w_den;
 780     int full_width  =  in_full_width * w_num / w_den;
 781     int height      =      in_height * h_num / h_den;
 782     int full_height = in_full_height * h_num / h_den;
 783     // This unpack alignment is the default, but setting it just in case.
 784     glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
 785 #ifndef GL_UNPACK_ROW_LENGTH
 786     int dst_width = full_upload ? full_width : width;
 787     int dst_pitch = ALIGN(dst_width * pixel_pitch, 4);
 788     if ( pitch != dst_pitch )
 789     {
 790         int buf_size = dst_pitch * full_height * pixel_pitch;
 791         const uint8_t *source = pixels;
 792         uint8_t *destination;
 793         if( !vgl->texture_temp_buf || vgl->texture_temp_buf_size < buf_size )
 794         {
 795             free( vgl->texture_temp_buf );
 796             vgl->texture_temp_buf = xmalloc( buf_size );
 797             vgl->texture_temp_buf_size = buf_size;
 798         }
 799         destination = vgl->texture_temp_buf;
 800
 801         for( int h = 0; h < height ; h++ )
 802         {
 803             memcpy( destination, source, width * pixel_pitch );
 804             source += pitch;
 805             destination += dst_pitch;
 806         }
 807         if (full_upload)
 808             glTexImage2D( tex_target, 0, tex_format,
 809                           full_width, full_height,
 810                           0, tex_format, tex_type, vgl->texture_temp_buf );
 811         else
 812             glTexSubImage2D( tex_target, 0,
 813                              0, 0,
 814                              width, height,
 815                              tex_format, tex_type, vgl->texture_temp_buf );
 816     } else {
 817 #else
 818     (void) width;
 819     (void) height;
 820     (void) vgl;
 821     {
 822         glPixelStorei(GL_UNPACK_ROW_LENGTH, pitch / pixel_pitch);
 823 #endif
 824         if (full_upload)
 825             glTexImage2D(tex_target, 0, tex_format,
 826                          full_width, full_height,
 827                          0, tex_format, tex_type, pixels);
 828         else
 829             glTexSubImage2D(tex_target, 0,
 830                             0, 0,
 831                             width, height,
 832                             tex_format, tex_type, pixels);
 833     }
 834 }
 835
 836 int vout_display_opengl_Prepare(vout_display_opengl_t *vgl,
 837                                 picture_t *picture, subpicture_t *subpicture)
 838 {
 839     if (vlc_gl_Lock(vgl->gl))
 840         return VLC_EGENERIC;
 841
 842     /* Update the texture */
 843     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
 844         if (vgl->use_multitexture) {
 845             glActiveTexture(GL_TEXTURE0 + j);
 846             glClientActiveTexture(GL_TEXTURE0 + j);
 847         }
 848         glBindTexture(vgl->tex_target, vgl->texture[0][j]);
 849
 850         Upload(vgl, picture->format.i_visible_width, vgl->fmt.i_visible_height,
 851                vgl->fmt.i_width, vgl->fmt.i_height,
 852                vgl->chroma->p[j].w.num, vgl->chroma->p[j].w.den, vgl->chroma->p[j].h.num, vgl->chroma->p[j].h.den,
 853                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);
 854     }
 855
 856     int         last_count = vgl->region_count;
 857     gl_region_t *last = vgl->region;
 858
 859     vgl->region_count = 0;
 860     vgl->region       = NULL;
 861
 862     if (subpicture) {
 863
 864         int count = 0;
 865         for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next)
 866             count++;
 867
 868         vgl->region_count = count;
 869         vgl->region       = calloc(count, sizeof(*vgl->region));
 870
 871         if (vgl->use_multitexture) {
 872             glActiveTexture(GL_TEXTURE0 + 0);
 873             glClientActiveTexture(GL_TEXTURE0 + 0);
 874         }
 875         int i = 0;
 876         for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next, i++) {
 877             gl_region_t *glr = &vgl->region[i];
 878
 879             glr->format = GL_RGBA;
 880             glr->type   = GL_UNSIGNED_BYTE;
 881             glr->width  = r->fmt.i_visible_width;
 882             glr->height = r->fmt.i_visible_height;
 883             if (!vgl->supports_npot) {
 884                 glr->width  = GetAlignedSize(glr->width);
 885                 glr->height = GetAlignedSize(glr->height);
 886                 glr->tex_width  = (float) r->fmt.i_visible_width  / glr->width;
 887                 glr->tex_height = (float) r->fmt.i_visible_height / glr->height;
 888             } else {
 889                 glr->tex_width  = 1.0;
 890                 glr->tex_height = 1.0;
 891             }
 892             glr->alpha  = (float)subpicture->i_alpha * r->i_alpha / 255 / 255;
 893             glr->left   =  2.0 * (r->i_x                          ) / subpicture->i_original_picture_width  - 1.0;
 894             glr->top    = -2.0 * (r->i_y                          ) / subpicture->i_original_picture_height + 1.0;
 895             glr->right  =  2.0 * (r->i_x + r->fmt.i_visible_width ) / subpicture->i_original_picture_width  - 1.0;
 896             glr->bottom = -2.0 * (r->i_y + r->fmt.i_visible_height) / subpicture->i_original_picture_height + 1.0;
 897
 898             glr->texture = 0;
 899             for (int j = 0; j < last_count; j++) {
 900                 if (last[j].texture &&
 901                     last[j].width  == glr->width &&
 902                     last[j].height == glr->height &&
 903                     last[j].format == glr->format &&
 904                     last[j].type   == glr->type) {
 905                     glr->texture = last[j].texture;
 906                     memset(&last[j], 0, sizeof(last[j]));
 907                     break;
 908                 }
 909             }
 910
 911             const int pixels_offset = r->fmt.i_y_offset * r->p_picture->p->i_pitch +
 912                                       r->fmt.i_x_offset * r->p_picture->p->i_pixel_pitch;
 913             if (glr->texture) {
 914                 glBindTexture(GL_TEXTURE_2D, glr->texture);
 915                 Upload(vgl, r->fmt.i_visible_width, r->fmt.i_visible_height, glr->width, glr->height, 1, 1, 1, 1,
 916                        r->p_picture->p->i_pitch, r->p_picture->p->i_pixel_pitch, 0,
 917                        &r->p_picture->p->p_pixels[pixels_offset], GL_TEXTURE_2D, glr->format, glr->type);
 918             } else {
 919                 glGenTextures(1, &glr->texture);
 920                 glBindTexture(GL_TEXTURE_2D, glr->texture);
 921 #if !USE_OPENGL_ES
 922                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_PRIORITY, 1.0);
 923                 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 924 #endif
 925                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 926                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 927                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 928                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 929                 Upload(vgl, r->fmt.i_visible_width, r->fmt.i_visible_height, glr->width, glr->height, 1, 1, 1, 1,
 930                        r->p_picture->p->i_pitch, r->p_picture->p->i_pixel_pitch, 1,
 931                        &r->p_picture->p->p_pixels[pixels_offset], GL_TEXTURE_2D, glr->format, glr->type);
 932             }
 933         }
 934     }
 935     for (int i = 0; i < last_count; i++) {
 936         if (last[i].texture)
 937             glDeleteTextures(1, &last[i].texture);
 938     }
 939     free(last);
 940
 941     vlc_gl_Unlock(vgl->gl);
 942     VLC_UNUSED(subpicture);
 943     return VLC_SUCCESS;
 944 }
 945
 946 #ifdef SUPPORTS_FIXED_PIPELINE
 947 static void DrawWithoutShaders(vout_display_opengl_t *vgl,
 948                                float *left, float *top, float *right, float *bottom)
 949 {
 950     static const GLfloat vertexCoord[] = {
 951         -1.0f, -1.0f,
 952          1.0f, -1.0f,
 953         -1.0f,  1.0f,
 954          1.0f,  1.0f,
 955     };
 956
 957     const GLfloat textureCoord[] = {
 958         left[0],  bottom[0],
 959         right[0], bottom[0],
 960         left[0],  top[0],
 961         right[0], top[0]
 962     };
 963
 964     glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
 965     glEnable(vgl->tex_target);
 966     glActiveTexture(GL_TEXTURE0 + 0);
 967     glClientActiveTexture(GL_TEXTURE0 + 0);
 968
 969     glBindTexture(vgl->tex_target, vgl->texture[0][0]);
 970
 971     glEnableClientState(GL_VERTEX_ARRAY);
 972     glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 973
 974     glTexCoordPointer(2, GL_FLOAT, 0, textureCoord);
 975     glVertexPointer(2, GL_FLOAT, 0, vertexCoord);
 976
 977     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 978
 979     glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 980     glDisableClientState(GL_VERTEX_ARRAY);
 981     glDisable(vgl->tex_target);
 982 }
 983 #endif
 984
 985 #ifdef SUPPORTS_SHADERS
 986 static void DrawWithShaders(vout_display_opengl_t *vgl,
 987                             float *left, float *top, float *right, float *bottom,
 988                             int program)
 989 {
 990     vgl->UseProgram(vgl->program[program]);
 991     if (program == 0) {
 992         if (vgl->chroma->plane_count == 3) {
 993             vgl->Uniform4fv(vgl->GetUniformLocation(vgl->program[0], "Coefficient"), 4, vgl->local_value);
 994             vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture0"), 0);
 995             vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture1"), 1);
 996             vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture2"), 2);
 997         }
 998         else if (vgl->chroma->plane_count == 1) {
 999             vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture0"), 0);
1000         }
1001     } else {
1002         vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[1], "Texture0"), 0);
1003         vgl->Uniform4f(vgl->GetUniformLocation(vgl->program[1], "FillColor"), 1.0f, 1.0f, 1.0f, 1.0f);
1004     }
1005
1006     static const GLfloat vertexCoord[] = {
1007         -1.0,  1.0,
1008         -1.0, -1.0,
1009          1.0,  1.0,
1010          1.0, -1.0,
1011     };
1012
1013     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
1014         const GLfloat textureCoord[] = {
1015             left[j],  top[j],
1016             left[j],  bottom[j],
1017             right[j], top[j],
1018             right[j], bottom[j],
1019         };
1020         glActiveTexture(GL_TEXTURE0+j);
1021         glClientActiveTexture(GL_TEXTURE0+j);
1022         glBindTexture(vgl->tex_target, vgl->texture[0][j]);
1023
1024         char attribute[20];
1025         snprintf(attribute, sizeof(attribute), "MultiTexCoord%1d", j);
1026         vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[program], attribute));
1027         vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[program], attribute), 2, GL_FLOAT, 0, 0, textureCoord);
1028     }
1029     glActiveTexture(GL_TEXTURE0 + 0);
1030     glClientActiveTexture(GL_TEXTURE0 + 0);
1031     vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[program], "VertexPosition"));
1032     vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[program], "VertexPosition"), 2, GL_FLOAT, 0, 0, vertexCoord);
1033
1034     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
1035 }
1036 #endif
1037
1038 int vout_display_opengl_Display(vout_display_opengl_t *vgl,
1039                                 const video_format_t *source)
1040 {
1041     if (vlc_gl_Lock(vgl->gl))
1042         return VLC_EGENERIC;
1043
1044     /* Why drawing here and not in Render()? Because this way, the
1045        OpenGL providers can call vout_display_opengl_Display to force redraw.i
1046        Currently, the OS X provider uses it to get a smooth window resizing */
1047     glClear(GL_COLOR_BUFFER_BIT);
1048
1049     /* Draw the picture */
1050     float left[PICTURE_PLANE_MAX];
1051     float top[PICTURE_PLANE_MAX];
1052     float right[PICTURE_PLANE_MAX];
1053     float bottom[PICTURE_PLANE_MAX];
1054     for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
1055         /* glTexCoord works differently with GL_TEXTURE_2D and
1056            GL_TEXTURE_RECTANGLE_EXT */
1057         float scale_w, scale_h;
1058
1059         if (vgl->tex_target == GL_TEXTURE_2D) {
1060             scale_w = (float)vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den / vgl->tex_width[j];
1061             scale_h = (float)vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den / vgl->tex_height[j];
1062
1063         } else {
1064             scale_w = 1.0;
1065             scale_h = 1.0;
1066         }
1067         left[j]   = (source->i_x_offset +                       0 ) * scale_w;
1068         top[j]    = (source->i_y_offset +                       0 ) * scale_h;
1069         right[j]  = (source->i_x_offset + source->i_visible_width ) * scale_w;
1070         bottom[j] = (source->i_y_offset + source->i_visible_height) * scale_h;
1071     }
1072
1073 #ifdef SUPPORTS_SHADERS
1074     if (vgl->program[0] && (vgl->chroma->plane_count == 3 || vgl->chroma->plane_count == 1))
1075         DrawWithShaders(vgl, left, top, right, bottom, 0);
1076     else if (vgl->program[1] && vgl->chroma->plane_count == 1)
1077         DrawWithShaders(vgl, left, top, right, bottom, 1);
1078     else
1079 #endif
1080     {
1081 #ifdef SUPPORTS_FIXED_PIPELINE
1082         DrawWithoutShaders(vgl, left, top, right, bottom);
1083 #endif
1084     }
1085
1086     /* Draw the subpictures */
1087     if (vgl->program[1]) {
1088 #ifdef SUPPORTS_SHADERS
1089         // Change the program for overlays
1090         vgl->UseProgram(vgl->program[1]);
1091         vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[1], "Texture"), 0);
1092 #endif
1093     }
1094
1095 #ifdef SUPPORTS_FIXED_PIPELINE
1096     glEnable(GL_TEXTURE_2D);
1097 #endif
1098     glEnable(GL_BLEND);
1099     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1100
1101     glActiveTexture(GL_TEXTURE0 + 0);
1102     glClientActiveTexture(GL_TEXTURE0 + 0);
1103     for (int i = 0; i < vgl->region_count; i++) {
1104         gl_region_t *glr = &vgl->region[i];
1105         const GLfloat vertexCoord[] = {
1106             glr->left,  glr->top,
1107             glr->left,  glr->bottom,
1108             glr->right, glr->top,
1109             glr->right, glr->bottom,
1110         };
1111         const GLfloat textureCoord[] = {
1112             0.0, 0.0,
1113             0.0, glr->tex_height,
1114             glr->tex_width, 0.0,
1115             glr->tex_width, glr->tex_height,
1116         };
1117
1118         glBindTexture(GL_TEXTURE_2D, glr->texture);
1119         if (vgl->program[1]) {
1120 #ifdef SUPPORTS_SHADERS
1121             vgl->Uniform4f(vgl->GetUniformLocation(vgl->program[1], "FillColor"), 1.0f, 1.0f, 1.0f, glr->alpha);
1122             vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[1], "MultiTexCoord0"));
1123             vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[1], "MultiTexCoord0"), 2, GL_FLOAT, 0, 0, textureCoord);
1124             vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[1], "VertexPosition"));
1125             vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[1], "VertexPosition"), 2, GL_FLOAT, 0, 0, vertexCoord);
1126 #endif
1127         } else {
1128 #ifdef SUPPORTS_FIXED_PIPELINE
1129             glEnableClientState(GL_VERTEX_ARRAY);
1130             glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1131             glColor4f(1.0f, 1.0f, 1.0f, glr->alpha);
1132             glTexCoordPointer(2, GL_FLOAT, 0, textureCoord);
1133             glVertexPointer(2, GL_FLOAT, 0, vertexCoord);
1134 #endif
1135         }
1136
1137         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
1138
1139         if (!vgl->program[1]) {
1140 #ifdef SUPPORTS_FIXED_PIPELINE
1141             glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1142             glDisableClientState(GL_VERTEX_ARRAY);
1143 #endif
1144         }
1145     }
1146     glDisable(GL_BLEND);
1147 #ifdef SUPPORTS_FIXED_PIPELINE
1148     glDisable(GL_TEXTURE_2D);
1149 #endif
1150
1151     /* Display */
1152     vlc_gl_Swap(vgl->gl);
1153
1154     vlc_gl_Unlock(vgl->gl);
1155     return VLC_SUCCESS;
1156 }
1157