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
7 * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
8 * Ilkka Ollakka <ileoo@videolan.org>
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>
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.
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.
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 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_picture_pool.h>
34 #include <vlc_subpicture.h>
35 #include <vlc_opengl.h>
39 #ifndef GL_CLAMP_TO_EDGE
40 # define GL_CLAMP_TO_EDGE 0x812F
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)*
65 # import <CoreFoundation/CoreFoundation.h>
70 # define GLSL_VERSION "100"
71 # define VLCGL_TEXTURE_COUNT 1
72 # define VLCGL_PICTURE_MAX 1
73 # define PRECISION "precision highp float;"
75 # define GLSL_VERSION "120"
76 # define VLCGL_TEXTURE_COUNT 1
77 # define VLCGL_PICTURE_MAX 128
81 static const vlc_fourcc_t gl_subpicture_chromas[] = {
101 struct vout_display_opengl_t {
106 const vlc_chroma_description_t *chroma;
113 int tex_width[PICTURE_PLANE_MAX];
114 int tex_height[PICTURE_PLANE_MAX];
116 GLuint texture[VLCGL_TEXTURE_COUNT][PICTURE_PLANE_MAX];
122 picture_pool_t *pool;
124 /* index 0 for normal and 1 for subtitle overlay */
126 GLint shader[3]; //3. is for the common vertex shader
128 GLfloat local_value[16];
130 /* Shader variables commands*/
131 PFNGLGETUNIFORMLOCATIONPROC GetUniformLocation;
132 PFNGLGETATTRIBLOCATIONPROC GetAttribLocation;
133 PFNGLVERTEXATTRIBPOINTERPROC VertexAttribPointer;
134 PFNGLENABLEVERTEXATTRIBARRAYPROC EnableVertexAttribArray;
136 PFNGLUNIFORM4FVPROC Uniform4fv;
137 PFNGLUNIFORM4FPROC Uniform4f;
138 PFNGLUNIFORM1IPROC Uniform1i;
141 PFNGLCREATESHADERPROC CreateShader;
142 PFNGLSHADERSOURCEPROC ShaderSource;
143 PFNGLCOMPILESHADERPROC CompileShader;
144 PFNGLDELETESHADERPROC DeleteShader;
146 PFNGLCREATEPROGRAMPROC CreateProgram;
147 PFNGLLINKPROGRAMPROC LinkProgram;
148 PFNGLUSEPROGRAMPROC UseProgram;
149 PFNGLDELETEPROGRAMPROC DeleteProgram;
151 PFNGLATTACHSHADERPROC AttachShader;
153 /* Shader log commands */
154 PFNGLGETPROGRAMIVPROC GetProgramiv;
155 PFNGLGETPROGRAMINFOLOGPROC GetProgramInfoLog;
156 PFNGLGETSHADERIVPROC GetShaderiv;
157 PFNGLGETSHADERINFOLOGPROC GetShaderInfoLog;
161 bool use_multitexture;
163 /* Non-power-of-2 texture size support */
167 static inline int GetAlignedSize(unsigned size)
169 /* Return the smallest larger or equal power of 2 */
170 unsigned align = 1 << (8 * sizeof (unsigned) - clz(size));
171 return ((align >> 1) == size) ? size : align;
175 static bool IsLuminance16Supported(int target)
179 glGenTextures(1, &texture);
180 glBindTexture(target, texture);
181 glTexImage2D(target, 0, GL_LUMINANCE16,
182 64, 64, 0, GL_LUMINANCE, GL_UNSIGNED_SHORT, NULL);
184 glGetTexLevelParameteriv(target, 0, GL_TEXTURE_LUMINANCE_SIZE, &size);
186 glDeleteTextures(1, &texture);
192 static void BuildVertexShader(vout_display_opengl_t *vgl,
195 /* Basic vertex shader */
196 const char *vertexShader =
197 "#version " GLSL_VERSION "\n"
199 "varying vec4 TexCoord0,TexCoord1, TexCoord2;"
200 "attribute vec4 MultiTexCoord0,MultiTexCoord1,MultiTexCoord2;"
201 "attribute vec4 VertexPosition;"
203 " TexCoord0 = MultiTexCoord0;"
204 " TexCoord1 = MultiTexCoord1;"
205 " TexCoord2 = MultiTexCoord2;"
206 " gl_Position = VertexPosition;"
209 *shader = vgl->CreateShader(GL_VERTEX_SHADER);
210 vgl->ShaderSource(*shader, 1, &vertexShader, NULL);
211 vgl->CompileShader(*shader);
214 static void BuildYUVFragmentShader(vout_display_opengl_t *vgl,
217 GLfloat *local_value,
218 const video_format_t *fmt,
219 float yuv_range_correction)
222 /* [R/G/B][Y U V O] from TV range to full range
223 * XXX we could also do hue/brightness/constrast/gamma
224 * by simply changing the coefficients
226 const float matrix_bt601_tv2full[12] = {
227 1.164383561643836, 0.0000, 1.596026785714286, -0.874202217873451 ,
228 1.164383561643836, -0.391762290094914, -0.812967647237771, 0.531667823499146 ,
229 1.164383561643836, 2.017232142857142, 0.0000, -1.085630789302022 ,
231 const float matrix_bt709_tv2full[12] = {
232 1.164383561643836, 0.0000, 1.792741071428571, -0.972945075016308 ,
233 1.164383561643836, -0.21324861427373, -0.532909328559444, 0.301482665475862 ,
234 1.164383561643836, 2.112401785714286, 0.0000, -1.133402217873451 ,
236 const float (*matrix) = fmt->i_height > 576 ? matrix_bt709_tv2full
237 : matrix_bt601_tv2full;
239 /* Basic linear YUV -> RGB conversion using bilinear interpolation */
240 const char *template_glsl_yuv =
241 "#version " GLSL_VERSION "\n"
243 "uniform sampler2D Texture0;"
244 "uniform sampler2D Texture1;"
245 "uniform sampler2D Texture2;"
246 "uniform vec4 Coefficient[4];"
247 "varying vec4 TexCoord0,TexCoord1,TexCoord2;"
250 " vec4 x,y,z,result;"
251 " x = texture2D(Texture0, TexCoord0.st);"
252 " %c = texture2D(Texture1, TexCoord1.st);"
253 " %c = texture2D(Texture2, TexCoord2.st);"
255 " result = x * Coefficient[0] + Coefficient[3];"
256 " result = (y * Coefficient[1]) + result;"
257 " result = (z * Coefficient[2]) + result;"
258 " gl_FragColor = result;"
260 bool swap_uv = fmt->i_chroma == VLC_CODEC_YV12 ||
261 fmt->i_chroma == VLC_CODEC_YV9;
264 if (asprintf(&code, template_glsl_yuv,
266 swap_uv ? 'y' : 'z') < 0)
269 for (int i = 0; i < 4; i++) {
270 float correction = i < 3 ? yuv_range_correction : 1.0;
271 /* We place coefficient values for coefficient[4] in one array from matrix values.
272 Notice that we fill values from top down instead of left to right.*/
273 for (int j = 0; j < 4; j++)
274 local_value[*local_count + i*4+j] = j < 3 ? correction * matrix[j*4+i]
280 *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
281 vgl->ShaderSource(*shader, 1, (const char **)&code, NULL);
282 vgl->CompileShader(*shader);
288 static void BuildRGBFragmentShader(vout_display_opengl_t *vgl,
291 // Simple shader for RGB
293 "#version " GLSL_VERSION "\n"
295 "uniform sampler2D Texture[3];"
296 "varying vec4 TexCoord0,TexCoord1,TexCoord2;"
299 " gl_FragColor = texture2D(Texture[0], TexCoord0.st);"
301 *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
302 vgl->ShaderSource(*shader, 1, &code, NULL);
303 vgl->CompileShader(*shader);
307 static void BuildRGBAFragmentShader(vout_display_opengl_t *vgl,
310 // Simple shader for RGBA
312 "#version " GLSL_VERSION "\n"
314 "uniform sampler2D Texture;"
315 "uniform vec4 FillColor;"
316 "varying vec4 TexCoord0;"
319 " gl_FragColor = texture2D(Texture, TexCoord0.st) * FillColor;"
321 *shader = vgl->CreateShader(GL_FRAGMENT_SHADER);
322 vgl->ShaderSource(*shader, 1, &code, NULL);
323 vgl->CompileShader(*shader);
326 vout_display_opengl_t *vout_display_opengl_New(video_format_t *fmt,
327 const vlc_fourcc_t **subpicture_chromas,
330 vout_display_opengl_t *vgl = calloc(1, sizeof(*vgl));
335 if (vlc_gl_Lock(vgl->gl)) {
340 if (vgl->gl->getProcAddress == NULL) {
341 fprintf(stderr, "getProcAddress not implemented, bailing out\n");
346 const char *extensions = (const char *)glGetString(GL_EXTENSIONS);
348 const unsigned char *ogl_version = glGetString(GL_VERSION);
349 bool supports_shaders = strverscmp((const char *)ogl_version, "2.0") >= 0;
351 bool supports_shaders = false;
354 vgl->CreateShader = (PFNGLCREATESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glCreateShader");
355 vgl->ShaderSource = (PFNGLSHADERSOURCEPROC)vlc_gl_GetProcAddress(vgl->gl, "glShaderSource");
356 vgl->CompileShader = (PFNGLCOMPILESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glCompileShader");
357 vgl->AttachShader = (PFNGLATTACHSHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glAttachShader");
359 vgl->GetProgramiv = (PFNGLGETPROGRAMIVPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetProgramiv");
360 vgl->GetShaderiv = (PFNGLGETSHADERIVPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetShaderiv");
361 vgl->GetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetProgramInfoLog");
362 vgl->GetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetShaderInfoLog");
364 vgl->DeleteShader = (PFNGLDELETESHADERPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteShader");
366 vgl->GetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetUniformLocation");
367 vgl->GetAttribLocation = (PFNGLGETATTRIBLOCATIONPROC)vlc_gl_GetProcAddress(vgl->gl, "glGetAttribLocation");
368 vgl->VertexAttribPointer= (PFNGLVERTEXATTRIBPOINTERPROC)vlc_gl_GetProcAddress(vgl->gl, "glVertexAttribPointer");
369 vgl->EnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)vlc_gl_GetProcAddress(vgl->gl, "glEnableVertexAttribArray");
370 vgl->Uniform4fv = (PFNGLUNIFORM4FVPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform4fv");
371 vgl->Uniform4f = (PFNGLUNIFORM4FPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform4f");
372 vgl->Uniform1i = (PFNGLUNIFORM1IPROC)vlc_gl_GetProcAddress(vgl->gl,"glUniform1i");
374 vgl->CreateProgram = (PFNGLCREATEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glCreateProgram");
375 vgl->LinkProgram = (PFNGLLINKPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glLinkProgram");
376 vgl->UseProgram = (PFNGLUSEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glUseProgram");
377 vgl->DeleteProgram = (PFNGLDELETEPROGRAMPROC)vlc_gl_GetProcAddress(vgl->gl, "glDeleteProgram");
379 if (!vgl->CreateShader || !vgl->ShaderSource || !vgl->CreateProgram)
380 supports_shaders = false;
382 vgl->supports_npot = HasExtension(extensions, "GL_ARB_texture_non_power_of_two") ||
383 HasExtension(extensions, "GL_APPLE_texture_2D_limited_npot");
386 /* OpenGL ES 2 includes support for non-power of 2 textures by specification
387 * so checks for extensions are bound to fail. Check for OpenGL ES version instead. */
388 const unsigned char *ogl_version = glGetString(GL_VERSION);
389 if (strverscmp((const char *)ogl_version, "2.0") >= 0)
390 vgl->supports_npot = true;
393 GLint max_texture_units = 0;
394 glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_texture_units);
398 /* work-around an iOS 6 bug */
399 if (kCFCoreFoundationVersionNumber >= 786.)
400 max_texture_units = 8;
401 supports_shaders = true;
405 /* Initialize with default chroma */
407 vgl->fmt.i_chroma = VLC_CODEC_RGB32;
408 # if defined(WORDS_BIGENDIAN)
409 vgl->fmt.i_rmask = 0xff000000;
410 vgl->fmt.i_gmask = 0x00ff0000;
411 vgl->fmt.i_bmask = 0x0000ff00;
413 vgl->fmt.i_rmask = 0x000000ff;
414 vgl->fmt.i_gmask = 0x0000ff00;
415 vgl->fmt.i_bmask = 0x00ff0000;
417 vgl->tex_target = GL_TEXTURE_2D;
418 vgl->tex_format = GL_RGBA;
419 vgl->tex_internal = GL_RGBA;
420 vgl->tex_type = GL_UNSIGNED_BYTE;
421 /* Use YUV if possible and needed */
422 bool need_fs_yuv = false;
423 float yuv_range_correction = 1.0;
425 if (max_texture_units >= 3 && supports_shaders && vlc_fourcc_IsYUV(fmt->i_chroma)) {
426 const vlc_fourcc_t *list = vlc_fourcc_GetYUVFallback(fmt->i_chroma);
428 const vlc_chroma_description_t *dsc = vlc_fourcc_GetChromaDescription(*list);
429 if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 1) {
432 vgl->fmt.i_chroma = *list;
433 vgl->tex_format = GL_LUMINANCE;
434 vgl->tex_internal = GL_LUMINANCE;
435 vgl->tex_type = GL_UNSIGNED_BYTE;
436 yuv_range_correction = 1.0;
439 } else if (dsc && dsc->plane_count == 3 && dsc->pixel_size == 2 &&
440 IsLuminance16Supported(vgl->tex_target)) {
443 vgl->fmt.i_chroma = *list;
444 vgl->tex_format = GL_LUMINANCE;
445 vgl->tex_internal = GL_LUMINANCE16;
446 vgl->tex_type = GL_UNSIGNED_SHORT;
447 yuv_range_correction = (float)((1 << 16) - 1) / ((1 << dsc->pixel_bits) - 1);
455 vgl->chroma = vlc_fourcc_GetChromaDescription(vgl->fmt.i_chroma);
456 vgl->use_multitexture = vgl->chroma->plane_count > 1;
459 for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
460 int w = vgl->fmt.i_width * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den;
461 int h = vgl->fmt.i_height * vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den;
462 if (vgl->supports_npot) {
463 vgl->tex_width[j] = w;
464 vgl->tex_height[j] = h;
466 vgl->tex_width[j] = GetAlignedSize(w);
467 vgl->tex_height[j] = GetAlignedSize(h);
471 /* Build program if needed */
477 vgl->local_count = 0;
478 if (supports_shaders && need_fs_yuv) {
479 BuildYUVFragmentShader(vgl, &vgl->shader[0], &vgl->local_count,
480 vgl->local_value, fmt, yuv_range_correction);
481 BuildRGBAFragmentShader(vgl, &vgl->shader[1]);
482 BuildVertexShader(vgl, &vgl->shader[2]);
484 /* Check shaders messages */
485 for (unsigned j = 0; j < 3; j++) {
487 vgl->GetShaderiv(vgl->shader[j], GL_INFO_LOG_LENGTH, &infoLength);
491 char *infolog = malloc(infoLength);
493 vgl->GetShaderInfoLog(vgl->shader[j], infoLength, &charsWritten, infolog);
494 fprintf(stderr, "shader %d: %s\n", j, infolog);
498 vgl->program[0] = vgl->CreateProgram();
499 vgl->AttachShader(vgl->program[0], vgl->shader[0]);
500 vgl->AttachShader(vgl->program[0], vgl->shader[2]);
501 vgl->LinkProgram(vgl->program[0]);
503 vgl->program[1] = vgl->CreateProgram();
504 vgl->AttachShader(vgl->program[1], vgl->shader[1]);
505 vgl->AttachShader(vgl->program[1], vgl->shader[2]);
506 vgl->LinkProgram(vgl->program[1]);
508 /* Check program messages */
509 for (GLuint i = 0; i < 2; i++) {
511 vgl->GetProgramiv(vgl->program[i], GL_INFO_LOG_LENGTH, &infoLength);
514 char *infolog = malloc(infoLength);
516 vgl->GetProgramInfoLog(vgl->program[i], infoLength, &charsWritten, infolog);
517 fprintf(stderr, "shader program %d: %s\n", i, infolog);
520 /* If there is some message, better to check linking is ok */
521 GLint link_status = GL_TRUE;
522 vgl->GetProgramiv(vgl->program[i], GL_LINK_STATUS, &link_status);
523 if (link_status == GL_FALSE) {
524 fprintf(stderr, "Unable to use program %d\n", i);
533 glDisable(GL_DEPTH_TEST);
534 glDepthMask(GL_FALSE);
535 glDisable(GL_CULL_FACE);
536 glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
537 glClear(GL_COLOR_BUFFER_BIT);
539 vlc_gl_Unlock(vgl->gl);
542 for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
543 for (int j = 0; j < PICTURE_PLANE_MAX; j++)
544 vgl->texture[i][j] = 0;
546 vgl->region_count = 0;
551 if (subpicture_chromas) {
552 *subpicture_chromas = gl_subpicture_chromas;
557 void vout_display_opengl_Delete(vout_display_opengl_t *vgl)
560 if (!vlc_gl_Lock(vgl->gl)) {
563 for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++)
564 glDeleteTextures(vgl->chroma->plane_count, vgl->texture[i]);
565 for (int i = 0; i < vgl->region_count; i++) {
566 if (vgl->region[i].texture)
567 glDeleteTextures(1, &vgl->region[i].texture);
571 if (vgl->program[0]) {
572 for (int i = 0; i < 2; i++)
573 vgl->DeleteProgram(vgl->program[i]);
574 for (int i = 0; i < 3; i++)
575 vgl->DeleteShader(vgl->shader[i]);
578 vlc_gl_Unlock(vgl->gl);
581 picture_pool_Delete(vgl->pool);
585 picture_pool_t *vout_display_opengl_GetPool(vout_display_opengl_t *vgl, unsigned requested_count)
590 /* Allocate our pictures */
591 picture_t *picture[VLCGL_PICTURE_MAX] = {NULL, };
594 for (count = 0; count < __MIN(VLCGL_PICTURE_MAX, requested_count); count++) {
595 picture[count] = picture_NewFromFormat(&vgl->fmt);
602 /* Wrap the pictures into a pool */
603 picture_pool_configuration_t cfg;
604 memset(&cfg, 0, sizeof(cfg));
605 cfg.picture_count = count;
606 cfg.picture = picture;
607 vgl->pool = picture_pool_NewExtended(&cfg);
611 /* Allocates our textures */
612 if (vlc_gl_Lock(vgl->gl))
615 for (int i = 0; i < VLCGL_TEXTURE_COUNT; i++) {
616 glGenTextures(vgl->chroma->plane_count, vgl->texture[i]);
617 for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
618 if (vgl->use_multitexture) {
619 glActiveTexture(GL_TEXTURE0 + j);
620 glClientActiveTexture(GL_TEXTURE0 + j);
622 glBindTexture(vgl->tex_target, vgl->texture[i][j]);
625 /* Set the texture parameters */
626 glTexParameterf(vgl->tex_target, GL_TEXTURE_PRIORITY, 1.0);
627 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
630 glTexParameteri(vgl->tex_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
631 glTexParameteri(vgl->tex_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
632 glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
633 glTexParameteri(vgl->tex_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
635 /* Call glTexImage2D only once, and use glTexSubImage2D later */
636 glTexImage2D(vgl->tex_target, 0,
637 vgl->tex_internal, vgl->tex_width[j], vgl->tex_height[j],
638 0, vgl->tex_format, vgl->tex_type, NULL);
642 vlc_gl_Unlock(vgl->gl);
647 for (unsigned i = 0; i < count; i++)
648 picture_Release(picture[i]);
652 int vout_display_opengl_Prepare(vout_display_opengl_t *vgl,
653 picture_t *picture, subpicture_t *subpicture)
655 if (vlc_gl_Lock(vgl->gl))
658 /* Update the texture */
659 for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
660 if (vgl->use_multitexture) {
661 glActiveTexture(GL_TEXTURE0 + j);
662 glClientActiveTexture(GL_TEXTURE0 + j);
664 glBindTexture(vgl->tex_target, vgl->texture[0][j]);
666 #ifndef GL_UNPACK_ROW_LENGTH
667 if ( (picture->p[j].i_pitch / picture->p[j].i_pixel_pitch) !=
668 ( picture->format.i_visible_width * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den ) )
670 uint8_t *new_plane = malloc( picture->format.i_visible_width * vgl->fmt.i_visible_height * vgl->chroma->p[j].h.num / (vgl->chroma->p[j].h.den * vgl->chroma->p[j].w.den ) );
671 uint8_t *destination = new_plane;
672 const uint8_t *source = picture->p[j].p_pixels;
674 for( unsigned height = 0; height < (vgl->fmt.i_visible_height * vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den) ; height++ )
676 memcpy( destination, source, picture->format.i_visible_width * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den );
677 source += picture->p[j].i_pitch / picture->p[j].i_pixel_pitch;
678 destination += picture->format.i_visible_width * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den;
680 glTexSubImage2D( vgl->tex_target, 0,
682 picture->format.i_visible_width * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den,
683 vgl->fmt.i_height * vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den,
684 vgl->tex_format, vgl->tex_type, new_plane );
688 glPixelStorei(GL_UNPACK_ROW_LENGTH, picture->p[j].i_pitch / picture->p[j].i_pixel_pitch);
690 glTexSubImage2D(vgl->tex_target, 0,
692 vgl->fmt.i_width * vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den,
693 vgl->fmt.i_height * vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den,
694 vgl->tex_format, vgl->tex_type, picture->p[j].p_pixels);
695 #ifndef GL_UNPACK_ROW_LENGTH
700 int last_count = vgl->region_count;
701 gl_region_t *last = vgl->region;
703 vgl->region_count = 0;
709 for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next)
712 vgl->region_count = count;
713 vgl->region = calloc(count, sizeof(*vgl->region));
715 if (vgl->use_multitexture) {
716 glActiveTexture(GL_TEXTURE0 + 0);
717 glClientActiveTexture(GL_TEXTURE0 + 0);
720 for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next, i++) {
721 gl_region_t *glr = &vgl->region[i];
723 glr->format = GL_RGBA;
724 glr->type = GL_UNSIGNED_BYTE;
725 glr->width = r->fmt.i_visible_width;
726 glr->height = r->fmt.i_visible_height;
727 if (!vgl->supports_npot) {
728 glr->width = GetAlignedSize(glr->width);
729 glr->height = GetAlignedSize(glr->height);
731 glr->alpha = (float)subpicture->i_alpha * r->i_alpha / 255 / 255;
732 glr->left = 2.0 * (r->i_x ) / subpicture->i_original_picture_width - 1.0;
733 glr->top = -2.0 * (r->i_y ) / subpicture->i_original_picture_height + 1.0;
734 glr->right = 2.0 * (r->i_x + r->fmt.i_visible_width ) / subpicture->i_original_picture_width - 1.0;
735 glr->bottom = -2.0 * (r->i_y + r->fmt.i_visible_height) / subpicture->i_original_picture_height + 1.0;
738 for (int j = 0; j < last_count; j++) {
739 if (last[j].texture &&
740 last[j].width == glr->width &&
741 last[j].height == glr->height &&
742 last[j].format == glr->format &&
743 last[j].type == glr->type) {
744 glr->texture = last[j].texture;
745 memset(&last[j], 0, sizeof(last[j]));
750 const int pixels_offset = r->fmt.i_y_offset * r->p_picture->p->i_pitch +
751 r->fmt.i_x_offset * r->p_picture->p->i_pixel_pitch;
753 glBindTexture(GL_TEXTURE_2D, glr->texture);
754 /* TODO set GL_UNPACK_ALIGNMENT */
755 #ifdef GL_UNPACK_ROW_LENGTH
756 glPixelStorei(GL_UNPACK_ROW_LENGTH, r->p_picture->p->i_pitch / r->p_picture->p->i_pixel_pitch);
758 glTexSubImage2D(GL_TEXTURE_2D, 0,
759 0, 0, glr->width, glr->height,
760 glr->format, glr->type, &r->p_picture->p->p_pixels[pixels_offset]);
762 glGenTextures(1, &glr->texture);
763 glBindTexture(GL_TEXTURE_2D, glr->texture);
765 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_PRIORITY, 1.0);
766 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
768 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
769 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
770 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
771 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
772 /* TODO set GL_UNPACK_ALIGNMENT */
773 #ifdef GL_UNPACK_ROW_LENGTH
774 glPixelStorei(GL_UNPACK_ROW_LENGTH, r->p_picture->p->i_pitch / r->p_picture->p->i_pixel_pitch);
776 glTexImage2D(GL_TEXTURE_2D, 0, glr->format,
777 glr->width, glr->height, 0, glr->format, glr->type,
778 &r->p_picture->p->p_pixels[pixels_offset]);
782 for (int i = 0; i < last_count; i++) {
784 glDeleteTextures(1, &last[i].texture);
788 vlc_gl_Unlock(vgl->gl);
789 VLC_UNUSED(subpicture);
793 static void DrawWithoutShaders(vout_display_opengl_t *vgl,
794 float *left, float *top, float *right, float *bottom)
796 static const GLfloat vertexCoord[] = {
803 const GLfloat textureCoord[] = {
810 glEnable(vgl->tex_target);
811 glActiveTexture(GL_TEXTURE0 + 0);
812 glClientActiveTexture(GL_TEXTURE0 + 0);
814 glBindTexture(vgl->tex_target, vgl->texture[0][0]);
816 glEnableClientState(GL_VERTEX_ARRAY);
817 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
819 glTexCoordPointer(2, GL_FLOAT, 0, textureCoord);
820 glVertexPointer(2, GL_FLOAT, 0, vertexCoord);
822 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
824 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
825 glDisableClientState(GL_VERTEX_ARRAY);
826 glDisable(vgl->tex_target);
829 static void DrawWithShaders(vout_display_opengl_t *vgl,
830 float *left, float *top, float *right, float *bottom)
832 vgl->UseProgram(vgl->program[0]);
833 vgl->Uniform4fv(vgl->GetUniformLocation(vgl->program[0], "Coefficient"), 4, vgl->local_value);
834 vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture0"), 0);
835 vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture1"), 1);
836 vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[0], "Texture2"), 2);
838 static const GLfloat vertexCoord[] = {
845 for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
846 const GLfloat textureCoord[] = {
852 glActiveTexture(GL_TEXTURE0+j);
853 glClientActiveTexture(GL_TEXTURE0+j);
854 glEnable(vgl->tex_target);
855 glBindTexture(vgl->tex_target, vgl->texture[0][j]);
858 snprintf(attribute, sizeof(attribute), "MultiTexCoord%1d", j);
859 vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[0], attribute));
860 vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[0], attribute), 2, GL_FLOAT, 0, 0, textureCoord);
862 glActiveTexture(GL_TEXTURE0 + 0);
863 glClientActiveTexture(GL_TEXTURE0 + 0);
864 vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[0], "VertexPosition"));
865 vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[0], "VertexPosition"), 2, GL_FLOAT, 0, 0, vertexCoord);
867 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
870 int vout_display_opengl_Display(vout_display_opengl_t *vgl,
871 const video_format_t *source)
873 if (vlc_gl_Lock(vgl->gl))
876 /* Why drawing here and not in Render()? Because this way, the
877 OpenGL providers can call vout_display_opengl_Display to force redraw.i
878 Currently, the OS X provider uses it to get a smooth window resizing */
879 glClear(GL_COLOR_BUFFER_BIT);
881 /* Draw the picture */
882 float left[PICTURE_PLANE_MAX];
883 float top[PICTURE_PLANE_MAX];
884 float right[PICTURE_PLANE_MAX];
885 float bottom[PICTURE_PLANE_MAX];
886 for (unsigned j = 0; j < vgl->chroma->plane_count; j++) {
887 /* glTexCoord works differently with GL_TEXTURE_2D and
888 GL_TEXTURE_RECTANGLE_EXT */
889 float scale_w, scale_h;
891 if (vgl->tex_target == GL_TEXTURE_2D) {
892 scale_w = (float)vgl->chroma->p[j].w.num / vgl->chroma->p[j].w.den / vgl->tex_width[j];
893 scale_h = (float)vgl->chroma->p[j].h.num / vgl->chroma->p[j].h.den / vgl->tex_height[j];
899 left[j] = (source->i_x_offset + 0 ) * scale_w;
900 top[j] = (source->i_y_offset + 0 ) * scale_h;
901 right[j] = (source->i_x_offset + source->i_visible_width ) * scale_w;
902 bottom[j] = (source->i_y_offset + source->i_visible_height) * scale_h;
906 DrawWithShaders(vgl, left, top ,right, bottom);
908 DrawWithoutShaders(vgl, left, top, right, bottom);
910 /* Draw the subpictures */
911 if (vgl->program[1]) {
912 // Change the program for overlays
913 vgl->UseProgram(vgl->program[1]);
914 vgl->Uniform1i(vgl->GetUniformLocation(vgl->program[1], "Texture"), 0);
917 glEnable(GL_TEXTURE_2D);
919 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
921 glActiveTexture(GL_TEXTURE0 + 0);
922 glClientActiveTexture(GL_TEXTURE0 + 0);
923 for (int i = 0; i < vgl->region_count; i++) {
924 gl_region_t *glr = &vgl->region[i];
925 const GLfloat vertexCoord[] = {
927 glr->left, glr->bottom,
928 glr->right, glr->top,
929 glr->right, glr->bottom,
931 static const GLfloat textureCoord[] = {
938 glBindTexture(GL_TEXTURE_2D, glr->texture);
939 if (vgl->program[1]) {
940 vgl->Uniform4f(vgl->GetUniformLocation(vgl->program[1], "FillColor"), 1.0f, 1.0f, 1.0f, glr->alpha);
941 vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[1], "MultiTexCoord0"));
942 vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[1], "MultiTexCoord0"), 2, GL_FLOAT, 0, 0, textureCoord);
943 vgl->EnableVertexAttribArray(vgl->GetAttribLocation(vgl->program[1], "VertexPosition"));
944 vgl->VertexAttribPointer(vgl->GetAttribLocation(vgl->program[1], "VertexPosition"), 2, GL_FLOAT, 0, 0, vertexCoord);
946 glEnableClientState(GL_VERTEX_ARRAY);
947 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
948 glColor4f(1.0f, 1.0f, 1.0f, glr->alpha);
949 glTexCoordPointer(2, GL_FLOAT, 0, textureCoord);
950 glVertexPointer(2, GL_FLOAT, 0, vertexCoord);
953 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
955 if (!vgl->program[1]) {
956 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
957 glDisableClientState(GL_VERTEX_ARRAY);
961 glDisable(GL_TEXTURE_2D);
964 vlc_gl_Swap(vgl->gl);
966 vlc_gl_Unlock(vgl->gl);