2 Copyright (C) 2018-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #ifdef DCPOMATIC_WINDOWS
26 #include "gl_video_view.h"
28 /* This will only build on an new-enough wxWidgets: see the comment in gl_video_view.h */
29 #if wxCHECK_VERSION(3,1,0)
31 #include "film_viewer.h"
33 #include "lib/butler.h"
34 #include "lib/cross.h"
35 #include "lib/dcpomatic_assert.h"
36 #include "lib/dcpomatic_log.h"
37 #include "lib/exceptions.h"
38 #include "lib/image.h"
39 #include "lib/player_video.h"
40 #include <boost/bind/bind.hpp>
44 #define GL_DO_NOT_WARN_IF_MULTI_GL_VERSION_HEADERS_INCLUDED
45 #include <OpenGL/OpenGL.h>
46 #include <OpenGL/gl3.h>
49 #ifdef DCPOMATIC_LINUX
54 #ifdef DCPOMATIC_WINDOWS
56 #include <GL/wglext.h>
61 using std::shared_ptr;
63 using boost::optional;
64 #if BOOST_VERSION >= 106100
65 using namespace boost::placeholders;
70 check_gl_error (char const * last)
72 GLenum const e = glGetError ();
73 if (e != GL_NO_ERROR) {
74 throw GLError (last, e);
79 GLVideoView::GLVideoView (FilmViewer* viewer, wxWindow *parent)
82 , _vsync_enabled (false)
86 wxGLAttributes attributes;
87 /* We don't need a depth buffer, and indeed there is apparently a bug with Windows/Intel HD 630
88 * which puts green lines over the OpenGL display if you have a non-zero depth buffer size.
89 * https://community.intel.com/t5/Graphics/Request-for-details-on-Intel-HD-630-green-lines-in-OpenGL-apps/m-p/1202179
91 attributes.PlatformDefaults().MinRGBA(8, 8, 8, 8).DoubleBuffer().Depth(0).EndList();
92 _canvas = new wxGLCanvas (
93 parent, attributes, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE
95 _canvas->Bind (wxEVT_PAINT, boost::bind(&GLVideoView::update, this));
96 _canvas->Bind (wxEVT_SIZE, boost::bind(&GLVideoView::size_changed, this, _1));
98 _canvas->Bind (wxEVT_TIMER, boost::bind(&GLVideoView::check_for_butler_errors, this));
99 _timer.reset (new wxTimer(_canvas));
100 _timer->Start (2000);
105 GLVideoView::size_changed (wxSizeEvent const& ev)
107 auto const scale = _canvas->GetDPIScaleFactor();
108 int const width = std::round(ev.GetSize().GetWidth() * scale);
109 int const height = std::round(ev.GetSize().GetHeight() * scale);
110 _canvas_size = { width, height };
111 LOG_GENERAL("GLVideoView canvas size changed to %1x%2", width, height);
116 GLVideoView::~GLVideoView ()
118 boost::this_thread::disable_interruption dis;
121 _thread.interrupt ();
127 GLVideoView::check_for_butler_errors ()
129 if (!_viewer->butler()) {
134 _viewer->butler()->rethrow ();
135 } catch (DecodeError& e) {
136 error_dialog (get(), e.what());
137 } catch (dcp::ReadError& e) {
138 error_dialog (get(), wxString::Format(_("Could not read DCP: %s"), std_to_wx(e.what())));
143 /** Called from the UI thread */
145 GLVideoView::update ()
147 if (!_canvas->IsShownOnScreen()) {
151 /* It appears important to do this from the GUI thread; if we do it from the GL thread
152 * on Linux we get strange failures to create the context for any version of GL higher
158 /* macOS gives errors if we don't do this (and therefore [NSOpenGLContext setView:]) from the main thread */
159 if (!_setup_shaders_done) {
161 _setup_shaders_done = true;
165 if (!_thread.joinable()) {
166 _thread = boost::thread (boost::bind(&GLVideoView::thread, this));
175 static constexpr char vertex_source[] =
176 "#version 330 core\n"
178 "layout (location = 0) in vec3 in_pos;\n"
179 "layout (location = 1) in vec2 in_tex_coord;\n"
181 "out vec2 TexCoord;\n"
185 " gl_Position = vec4(in_pos, 1.0);\n"
186 " TexCoord = in_tex_coord;\n"
190 /* Bicubic interpolation stolen from https://stackoverflow.com/questions/13501081/efficient-bicubic-filtering-code-in-glsl */
191 static constexpr char fragment_source[] =
192 "#version 330 core\n"
194 "in vec2 TexCoord;\n"
196 "uniform sampler2D texture_sampler;\n"
197 /* type = 0: draw outline content rectangle
198 * type = 1: draw crop guess rectangle
199 * type = 2: draw XYZ image
200 * type = 3: draw RGB image (with sRGB/Rec709 primaries)
201 * See FragmentType enum below.
203 "uniform int type = 0;\n"
204 "uniform vec4 outline_content_colour;\n"
205 "uniform vec4 crop_guess_colour;\n"
206 "uniform mat4 xyz_rec709_colour_conversion;\n"
208 "out vec4 FragColor;\n"
210 "vec4 cubic(float x)\n"
212 "#define IN_GAMMA 2.6\n"
213 "#define OUT_GAMMA 0.454545455\n" // 1 / 2.2
214 "#define DCI_COEFFICIENT 0.91655528\n" // 48 / 53.37
217 " float x2 = x * x;\n"
218 " float x3 = x2 * x;\n"
220 " w.x = -x3 + 3 * x2 - 3 * x + 1;\n"
221 " w.y = 3 * x3 - 6 * x2 + 4;\n"
222 " w.z = -3 * x3 + 3 * x2 + 3 * x + 1;\n"
227 "vec4 texture_bicubic(sampler2D sampler, vec2 tex_coords)\n"
229 " vec2 tex_size = textureSize(sampler, 0);\n"
230 " vec2 inv_tex_size = 1.0 / tex_size;\n"
232 " tex_coords = tex_coords * tex_size - 0.5;\n"
234 " vec2 fxy = fract(tex_coords);\n"
235 " tex_coords -= fxy;\n"
237 " vec4 xcubic = cubic(fxy.x);\n"
238 " vec4 ycubic = cubic(fxy.y);\n"
240 " vec4 c = tex_coords.xxyy + vec2 (-0.5, +1.5).xyxy;\n"
242 " vec4 s = vec4(xcubic.xz + xcubic.yw, ycubic.xz + ycubic.yw);\n"
243 " vec4 offset = c + vec4 (xcubic.yw, ycubic.yw) / s;\n"
245 " offset *= inv_tex_size.xxyy;\n"
247 " vec4 sample0 = texture(sampler, offset.xz);\n"
248 " vec4 sample1 = texture(sampler, offset.yz);\n"
249 " vec4 sample2 = texture(sampler, offset.xw);\n"
250 " vec4 sample3 = texture(sampler, offset.yw);\n"
252 " float sx = s.x / (s.x + s.y);\n"
253 " float sy = s.z / (s.z + s.w);\n"
256 " mix(sample3, sample2, sx), mix(sample1, sample0, sx)\n"
264 " FragColor = outline_content_colour;\n"
267 " FragColor = crop_guess_colour;\n"
270 " FragColor = texture_bicubic(texture_sampler, TexCoord);\n"
271 " FragColor.x = pow(FragColor.x, IN_GAMMA) / DCI_COEFFICIENT;\n"
272 " FragColor.y = pow(FragColor.y, IN_GAMMA) / DCI_COEFFICIENT;\n"
273 " FragColor.z = pow(FragColor.z, IN_GAMMA) / DCI_COEFFICIENT;\n"
274 " FragColor = xyz_rec709_colour_conversion * FragColor;\n"
275 " FragColor.x = pow(FragColor.x, OUT_GAMMA);\n"
276 " FragColor.y = pow(FragColor.y, OUT_GAMMA);\n"
277 " FragColor.z = pow(FragColor.z, OUT_GAMMA);\n"
280 " FragColor = texture_bicubic(texture_sampler, TexCoord);\n"
286 enum class FragmentType
296 GLVideoView::ensure_context ()
299 wxGLContextAttrs attrs;
300 attrs.PlatformDefaults().CoreProfile().OGLVersion(4, 1).EndList();
301 _context = new wxGLContext (_canvas, nullptr, &attrs);
302 if (!_context->IsOK()) {
303 throw GLError ("Making GL context", -1);
309 /* Offset and number of indices for the things in the indices array below */
310 static constexpr int indices_video_texture_offset = 0;
311 static constexpr int indices_video_texture_number = 6;
312 static constexpr int indices_subtitle_texture_offset = indices_video_texture_offset + indices_video_texture_number;
313 static constexpr int indices_subtitle_texture_number = 6;
314 static constexpr int indices_outline_content_offset = indices_subtitle_texture_offset + indices_subtitle_texture_number;
315 static constexpr int indices_outline_content_number = 8;
316 static constexpr int indices_crop_guess_offset = indices_outline_content_offset + indices_outline_content_number;
317 static constexpr int indices_crop_guess_number = 8;
319 static constexpr unsigned int indices[] = {
320 0, 1, 3, // video texture triangle #1
321 1, 2, 3, // video texture triangle #2
322 4, 5, 7, // subtitle texture triangle #1
323 5, 6, 7, // subtitle texture triangle #2
324 8, 9, // outline content line #1
325 9, 10, // outline content line #2
326 10, 11, // outline content line #3
327 11, 8, // outline content line #4
328 12, 13, // crop guess line #1
329 13, 14, // crop guess line #2
330 14, 15, // crop guess line #3
331 15, 12, // crop guess line #4
334 /* Offsets of things in the GL_ARRAY_BUFFER */
335 static constexpr int array_buffer_video_offset = 0;
336 static constexpr int array_buffer_subtitle_offset = array_buffer_video_offset + 4 * 5 * sizeof(float);
337 static constexpr int array_buffer_outline_content_offset = array_buffer_subtitle_offset + 4 * 5 * sizeof(float);
338 static constexpr int array_buffer_crop_guess_offset = array_buffer_outline_content_offset + 4 * 5 * sizeof(float);
342 GLVideoView::setup_shaders ()
344 DCPOMATIC_ASSERT (_canvas);
345 DCPOMATIC_ASSERT (_context);
346 auto r = _canvas->SetCurrent (*_context);
347 DCPOMATIC_ASSERT (r);
349 #ifdef DCPOMATIC_WINDOWS
352 throw GLError(reinterpret_cast<char const*>(glewGetErrorString(r)));
356 auto get_information = [this](GLenum name) {
357 auto s = glGetString (name);
359 _information[name] = std::string (reinterpret_cast<char const *>(s));
363 get_information (GL_VENDOR);
364 get_information (GL_RENDERER);
365 get_information (GL_VERSION);
366 get_information (GL_SHADING_LANGUAGE_VERSION);
368 glGenVertexArrays(1, &_vao);
369 check_gl_error ("glGenVertexArrays");
371 glGenBuffers(1, &vbo);
372 check_gl_error ("glGenBuffers");
374 glGenBuffers(1, &ebo);
375 check_gl_error ("glGenBuffers");
377 glBindVertexArray(_vao);
378 check_gl_error ("glBindVertexArray");
380 glBindBuffer(GL_ARRAY_BUFFER, vbo);
381 check_gl_error ("glBindBuffer");
383 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
384 check_gl_error ("glBindBuffer");
385 glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
386 check_gl_error ("glBufferData");
388 /* position attribute to vertex shader (location = 0) */
389 glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), nullptr);
390 glEnableVertexAttribArray(0);
391 /* texture coord attribute to vertex shader (location = 1) */
392 glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), reinterpret_cast<void*>(3 * sizeof(float)));
393 glEnableVertexAttribArray(1);
394 check_gl_error ("glEnableVertexAttribArray");
396 auto compile = [](GLenum type, char const* source) -> GLuint {
397 auto shader = glCreateShader(type);
398 DCPOMATIC_ASSERT (shader);
399 GLchar const * src[] = { static_cast<GLchar const *>(source) };
400 glShaderSource(shader, 1, src, nullptr);
401 check_gl_error ("glShaderSource");
402 glCompileShader(shader);
403 check_gl_error ("glCompileShader");
405 glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);
408 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &log_length);
410 if (log_length > 0) {
411 std::vector<char> log_char(log_length);
412 glGetShaderInfoLog(shader, log_length, nullptr, log_char.data());
413 log = string(log_char.data());
415 glDeleteShader(shader);
416 throw GLError(String::compose("Could not compile shader (%1)", log).c_str(), -1);
421 auto vertex_shader = compile (GL_VERTEX_SHADER, vertex_source);
422 auto fragment_shader = compile (GL_FRAGMENT_SHADER, fragment_source);
424 auto program = glCreateProgram();
425 check_gl_error ("glCreateProgram");
426 glAttachShader (program, vertex_shader);
427 check_gl_error ("glAttachShader");
428 glAttachShader (program, fragment_shader);
429 check_gl_error ("glAttachShader");
430 glLinkProgram (program);
431 check_gl_error ("glLinkProgram");
433 glGetProgramiv (program, GL_LINK_STATUS, &ok);
436 glGetProgramiv(program, GL_INFO_LOG_LENGTH, &log_length);
438 if (log_length > 0) {
439 std::vector<char> log_char(log_length);
440 glGetProgramInfoLog(program, log_length, nullptr, log_char.data());
441 log = string(log_char.data());
443 glDeleteProgram (program);
444 throw GLError(String::compose("Could not link shader (%1)", log).c_str(), -1);
446 glDeleteShader (vertex_shader);
447 glDeleteShader (fragment_shader);
449 glUseProgram (program);
451 _fragment_type = glGetUniformLocation (program, "type");
452 check_gl_error ("glGetUniformLocation");
453 set_outline_content_colour (program);
454 set_crop_guess_colour (program);
456 auto ublas_to_gl = [](boost::numeric::ublas::matrix<double> const& ublas, GLfloat* gl) {
457 gl[0] = static_cast<float>(ublas(0, 0));
458 gl[1] = static_cast<float>(ublas(0, 1));
459 gl[2] = static_cast<float>(ublas(0, 2));
461 gl[4] = static_cast<float>(ublas(1, 0));
462 gl[5] = static_cast<float>(ublas(1, 1));
463 gl[6] = static_cast<float>(ublas(1, 2));
465 gl[8] = static_cast<float>(ublas(2, 0));
466 gl[9] = static_cast<float>(ublas(2, 1));
467 gl[10] = static_cast<float>(ublas(2, 2));
476 auto conversion = dcp::ColourConversion::rec709_to_xyz();
477 boost::numeric::ublas::matrix<double> matrix = conversion.xyz_to_rgb ();
478 GLfloat gl_matrix[16];
479 ublas_to_gl(matrix, gl_matrix);
481 auto xyz_rec709_colour_conversion = glGetUniformLocation(program, "xyz_rec709_colour_conversion");
482 check_gl_error ("glGetUniformLocation");
483 glUniformMatrix4fv(xyz_rec709_colour_conversion, 1, GL_TRUE, gl_matrix);
487 check_gl_error ("glLineWidth");
489 check_gl_error ("glEnable");
490 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
491 check_gl_error ("glBlendFunc");
493 /* Reserve space for the GL_ARRAY_BUFFER */
494 glBufferData(GL_ARRAY_BUFFER, 16 * 5 * sizeof(float), nullptr, GL_STATIC_DRAW);
495 check_gl_error ("glBufferData");
500 GLVideoView::set_outline_content_colour (GLuint program)
502 auto uniform = glGetUniformLocation (program, "outline_content_colour");
503 check_gl_error ("glGetUniformLocation");
504 auto colour = outline_content_colour ();
505 glUniform4f (uniform, colour.Red() / 255.0f, colour.Green() / 255.0f, colour.Blue() / 255.0f, 1.0f);
506 check_gl_error ("glUniform4f");
511 GLVideoView::set_crop_guess_colour (GLuint program)
513 auto uniform = glGetUniformLocation (program, "crop_guess_colour");
514 check_gl_error ("glGetUniformLocation");
515 auto colour = crop_guess_colour ();
516 glUniform4f (uniform, colour.Red() / 255.0f, colour.Green() / 255.0f, colour.Blue() / 255.0f, 1.0f);
517 check_gl_error ("glUniform4f");
524 auto pad = pad_colour();
525 glClearColor(pad.Red() / 255.0, pad.Green() / 255.0, pad.Blue() / 255.0, 1.0);
526 glClear (GL_COLOR_BUFFER_BIT);
527 check_gl_error ("glClear");
529 auto const size = _canvas_size.load();
530 int const width = size.GetWidth();
531 int const height = size.GetHeight();
533 if (width < 64 || height < 0) {
537 glViewport (0, 0, width, height);
538 check_gl_error ("glViewport");
540 glBindVertexArray(_vao);
541 check_gl_error ("glBindVertexArray");
542 glUniform1i(_fragment_type, static_cast<GLint>(_optimise_for_j2k ? FragmentType::XYZ_IMAGE : FragmentType::REC709_IMAGE));
543 _video_texture->bind();
544 glDrawElements (GL_TRIANGLES, indices_video_texture_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_video_texture_offset * sizeof(int)));
545 if (_have_subtitle_to_render) {
546 glUniform1i(_fragment_type, static_cast<GLint>(FragmentType::REC709_IMAGE));
547 _subtitle_texture->bind();
548 glDrawElements (GL_TRIANGLES, indices_subtitle_texture_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_subtitle_texture_offset * sizeof(int)));
550 if (_viewer->outline_content()) {
551 glUniform1i(_fragment_type, static_cast<GLint>(FragmentType::OUTLINE_CONTENT));
552 glDrawElements (GL_LINES, indices_outline_content_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_outline_content_offset * sizeof(int)));
553 check_gl_error ("glDrawElements");
555 if (auto guess = _viewer->crop_guess()) {
556 glUniform1i(_fragment_type, static_cast<GLint>(FragmentType::CROP_GUESS));
557 glDrawElements (GL_LINES, indices_crop_guess_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_crop_guess_offset * sizeof(int)));
558 check_gl_error ("glDrawElements");
562 check_gl_error ("glFlush");
564 _canvas->SwapBuffers();
569 GLVideoView::set_image (shared_ptr<const PlayerVideo> pv)
571 shared_ptr<const Image> video = _optimise_for_j2k ? pv->raw_image() : pv->image(boost::bind(&PlayerVideo::force, AV_PIX_FMT_RGB24), VideoRange::FULL, true);
573 /* Only the player's black frames should be aligned at this stage, so this should
574 * almost always have no work to do.
576 video = Image::ensure_alignment (video, Image::Alignment::COMPACT);
578 /** If _optimise_for_j2k is true we render a XYZ image, doing the colourspace
579 * conversion, scaling and video range conversion in the GL shader.
580 * Otherwise we render a RGB image without any shader-side processing.
583 _video_texture->set (video);
585 auto const text = pv->text();
586 _have_subtitle_to_render = static_cast<bool>(text) && _optimise_for_j2k;
587 if (_have_subtitle_to_render) {
588 /* opt: only do this if it's a new subtitle? */
589 DCPOMATIC_ASSERT (text->image->alignment() == Image::Alignment::COMPACT);
590 _subtitle_texture->set (text->image);
594 auto const canvas_size = _canvas_size.load();
595 int const canvas_width = canvas_size.GetWidth();
596 int const canvas_height = canvas_size.GetHeight();
597 auto const inter_position = player_video().first->inter_position();
598 auto const inter_size = player_video().first->inter_size();
599 auto const out_size = player_video().first->out_size();
600 auto const crop_guess = _viewer->crop_guess();
602 auto x_offset = std::max(0, (canvas_width - out_size.width) / 2);
603 auto y_offset = std::max(0, (canvas_height - out_size.height) / 2);
605 _last_canvas_size.set_next (canvas_size);
606 _last_video_size.set_next (video->size());
607 _last_inter_position.set_next (inter_position);
608 _last_inter_size.set_next (inter_size);
609 _last_out_size.set_next (out_size);
610 _last_crop_guess.set_next (crop_guess);
615 Rectangle (wxSize canvas_size, float x, float y, dcp::Size size)
616 : _canvas_size (canvas_size)
618 auto const x1 = x_pixels_to_gl(x);
619 auto const y1 = y_pixels_to_gl(y);
620 auto const x2 = x_pixels_to_gl(x + size.width);
621 auto const y2 = y_pixels_to_gl(y + size.height);
623 /* The texture coordinates here have to account for the fact that when we put images into the texture OpenGL
624 * expected us to start at the lower left but we actually started at the top left. So although the
625 * top of the texture is at 1.0 we pretend it's the other way round.
645 _vertices[12] = 0.0f;
646 _vertices[13] = 0.0f;
647 _vertices[14] = 0.0f;
652 _vertices[17] = 0.0f;
653 _vertices[18] = 0.0f;
654 _vertices[19] = 1.0f;
657 float const * vertices () const {
661 int const size () const {
662 return sizeof(_vertices);
666 /* @param x x position in pixels where 0 is left and canvas_width is right on screen */
667 float x_pixels_to_gl(int x) const {
668 return (x * 2.0f / _canvas_size.GetWidth()) - 1.0f;
671 /* @param y y position in pixels where 0 is top and canvas_height is bottom on screen */
672 float y_pixels_to_gl(int y) const {
673 return 1.0f - (y * 2.0f / _canvas_size.GetHeight());
680 auto const sizing_changed = _last_canvas_size.changed() || _last_inter_position.changed() || _last_inter_size.changed() || _last_out_size.changed();
682 if (sizing_changed) {
683 const auto video = _optimise_for_j2k ?
684 Rectangle(canvas_size, inter_position.x + x_offset, inter_position.y + y_offset, inter_size)
685 : Rectangle(canvas_size, x_offset, y_offset, out_size);
687 glBufferSubData (GL_ARRAY_BUFFER, array_buffer_video_offset, video.size(), video.vertices());
688 check_gl_error ("glBufferSubData (video)");
690 const auto outline_content = Rectangle(canvas_size, inter_position.x + x_offset, inter_position.y + y_offset, inter_size);
691 glBufferSubData (GL_ARRAY_BUFFER, array_buffer_outline_content_offset, outline_content.size(), outline_content.vertices());
692 check_gl_error ("glBufferSubData (outline_content)");
695 if ((sizing_changed || _last_crop_guess.changed()) && crop_guess) {
696 auto const crop_guess_rectangle = Rectangle(
698 inter_position.x + x_offset + inter_size.width * crop_guess->x,
699 inter_position.y + y_offset + inter_size.height * crop_guess->y,
700 dcp::Size(inter_size.width * crop_guess->width, inter_size.height * crop_guess->height)
702 glBufferSubData (GL_ARRAY_BUFFER, array_buffer_crop_guess_offset, crop_guess_rectangle.size(), crop_guess_rectangle.vertices());
703 check_gl_error ("glBufferSubData (crop_guess_rectangle)");
706 if (_have_subtitle_to_render) {
707 const auto subtitle = Rectangle(canvas_size, inter_position.x + x_offset + text->position.x, inter_position.y + y_offset + text->position.y, text->image->size());
708 glBufferSubData (GL_ARRAY_BUFFER, array_buffer_subtitle_offset, subtitle.size(), subtitle.vertices());
709 check_gl_error ("glBufferSubData (subtitle)");
712 /* opt: where should these go? */
714 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
715 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
716 check_gl_error ("glTexParameteri");
718 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
719 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
720 check_gl_error ("glTexParameterf");
725 GLVideoView::start ()
729 boost::mutex::scoped_lock lm (_playing_mutex);
731 _thread_work_condition.notify_all ();
737 boost::mutex::scoped_lock lm (_playing_mutex);
743 GLVideoView::thread_playing ()
745 if (length() != dcpomatic::DCPTime()) {
746 auto const next = position() + one_video_frame();
748 if (next >= length()) {
749 _viewer->finished ();
753 get_next_frame (false);
754 set_image_and_draw ();
758 optional<int> n = time_until_next_frame();
762 get_next_frame (true);
769 GLVideoView::set_image_and_draw ()
771 auto pv = player_video().first;
779 _viewer->image_changed (pv);
785 GLVideoView::thread ()
788 start_of_thread ("GLVideoView");
790 #if defined(DCPOMATIC_OSX)
791 /* Without this we see errors like
792 * ../src/osx/cocoa/glcanvas.mm(194): assert ""context"" failed in SwapBuffers(): should have current context [in thread 700006970000]
794 WXGLSetCurrentContext (_context->GetWXGLContext());
796 if (!_setup_shaders_done) {
798 _setup_shaders_done = true;
802 #if defined(DCPOMATIC_LINUX) && defined(DCPOMATIC_HAVE_GLX_SWAP_INTERVAL_EXT)
803 if (_canvas->IsExtensionSupported("GLX_EXT_swap_control")) {
805 Display* dpy = wxGetX11Display();
806 glXSwapIntervalEXT (dpy, DefaultScreen(dpy), 1);
807 _vsync_enabled = true;
811 #ifdef DCPOMATIC_WINDOWS
812 if (_canvas->IsExtensionSupported("WGL_EXT_swap_control")) {
814 PFNWGLSWAPINTERVALEXTPROC swap = (PFNWGLSWAPINTERVALEXTPROC) wglGetProcAddress("wglSwapIntervalEXT");
817 _vsync_enabled = true;
825 GLint swapInterval = 1;
826 CGLSetParameter (CGLGetCurrentContext(), kCGLCPSwapInterval, &swapInterval);
827 _vsync_enabled = true;
830 _video_texture.reset(new Texture(_optimise_for_j2k ? 2 : 1));
831 _subtitle_texture.reset(new Texture(1));
834 boost::mutex::scoped_lock lm (_playing_mutex);
835 while (!_playing && !_one_shot) {
836 _thread_work_condition.wait (lm);
842 } else if (_one_shot) {
844 set_image_and_draw ();
847 boost::this_thread::interruption_point ();
848 dcpomatic_sleep_milliseconds (time_until_next_frame().get_value_or(0));
851 /* XXX: leaks _context, but that seems preferable to deleting it here
852 * without also deleting the wxGLCanvas.
861 VideoView::NextFrameResult
862 GLVideoView::display_next_frame (bool non_blocking)
864 NextFrameResult const r = get_next_frame (non_blocking);
871 GLVideoView::request_one_shot ()
873 boost::mutex::scoped_lock lm (_playing_mutex);
875 _thread_work_condition.notify_all ();
879 Texture::Texture (GLint unpack_alignment)
880 : _unpack_alignment (unpack_alignment)
882 glGenTextures (1, &_name);
883 check_gl_error ("glGenTextures");
889 glDeleteTextures (1, &_name);
896 glBindTexture(GL_TEXTURE_2D, _name);
897 check_gl_error ("glBindTexture");
902 Texture::set (shared_ptr<const Image> image)
904 auto const create = !_size || image->size() != _size;
905 _size = image->size();
907 glPixelStorei (GL_UNPACK_ALIGNMENT, _unpack_alignment);
908 check_gl_error ("glPixelStorei");
910 DCPOMATIC_ASSERT (image->alignment() == Image::Alignment::COMPACT);
912 GLint internal_format;
916 switch (image->pixel_format()) {
917 case AV_PIX_FMT_BGRA:
918 internal_format = GL_RGBA8;
920 type = GL_UNSIGNED_BYTE;
922 case AV_PIX_FMT_RGBA:
923 internal_format = GL_RGBA8;
925 type = GL_UNSIGNED_BYTE;
927 case AV_PIX_FMT_RGB24:
928 internal_format = GL_RGBA8;
930 type = GL_UNSIGNED_BYTE;
932 case AV_PIX_FMT_XYZ12:
933 internal_format = GL_RGBA12;
935 type = GL_UNSIGNED_SHORT;
938 throw PixelFormatError ("Texture::set", image->pixel_format());
944 glTexImage2D (GL_TEXTURE_2D, 0, internal_format, _size->width, _size->height, 0, format, type, image->data()[0]);
945 check_gl_error ("glTexImage2D");
947 glTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, _size->width, _size->height, format, type, image->data()[0]);
948 check_gl_error ("glTexSubImage2D");