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 XYZ image
199 * type = 2: draw RGB image
200 * See FragmentType enum below.
202 "uniform int type = 0;\n"
203 "uniform vec4 outline_content_colour;\n"
204 "uniform mat4 colour_conversion;\n"
206 "out vec4 FragColor;\n"
208 "vec4 cubic(float x)\n"
210 "#define IN_GAMMA 2.2\n"
211 "#define OUT_GAMMA 0.384615385\n" // 1 / 2.6
212 "#define DCI_COEFFICIENT 0.91655528\n" // 48 / 53.37
215 " float x2 = x * x;\n"
216 " float x3 = x2 * x;\n"
218 " w.x = -x3 + 3 * x2 - 3 * x + 1;\n"
219 " w.y = 3 * x3 - 6 * x2 + 4;\n"
220 " w.z = -3 * x3 + 3 * x2 + 3 * x + 1;\n"
225 "vec4 texture_bicubic(sampler2D sampler, vec2 tex_coords)\n"
227 " vec2 tex_size = textureSize(sampler, 0);\n"
228 " vec2 inv_tex_size = 1.0 / tex_size;\n"
230 " tex_coords = tex_coords * tex_size - 0.5;\n"
232 " vec2 fxy = fract(tex_coords);\n"
233 " tex_coords -= fxy;\n"
235 " vec4 xcubic = cubic(fxy.x);\n"
236 " vec4 ycubic = cubic(fxy.y);\n"
238 " vec4 c = tex_coords.xxyy + vec2 (-0.5, +1.5).xyxy;\n"
240 " vec4 s = vec4(xcubic.xz + xcubic.yw, ycubic.xz + ycubic.yw);\n"
241 " vec4 offset = c + vec4 (xcubic.yw, ycubic.yw) / s;\n"
243 " offset *= inv_tex_size.xxyy;\n"
245 " vec4 sample0 = texture(sampler, offset.xz);\n"
246 " vec4 sample1 = texture(sampler, offset.yz);\n"
247 " vec4 sample2 = texture(sampler, offset.xw);\n"
248 " vec4 sample3 = texture(sampler, offset.yw);\n"
250 " float sx = s.x / (s.x + s.y);\n"
251 " float sy = s.z / (s.z + s.w);\n"
254 " mix(sample3, sample2, sx), mix(sample1, sample0, sx)\n"
262 " FragColor = outline_content_colour;\n"
265 " FragColor = texture_bicubic(texture_sampler, TexCoord);\n"
266 " FragColor.x = pow(FragColor.x, IN_GAMMA) / DCI_COEFFICIENT;\n"
267 " FragColor.y = pow(FragColor.y, IN_GAMMA) / DCI_COEFFICIENT;\n"
268 " FragColor.z = pow(FragColor.z, IN_GAMMA) / DCI_COEFFICIENT;\n"
269 " FragColor = colour_conversion * FragColor;\n"
270 " FragColor.x = pow(FragColor.x, OUT_GAMMA);\n"
271 " FragColor.y = pow(FragColor.y, OUT_GAMMA);\n"
272 " FragColor.z = pow(FragColor.z, OUT_GAMMA);\n"
275 " FragColor = texture_bicubic(texture_sampler, TexCoord);\n"
281 enum class FragmentType
290 GLVideoView::ensure_context ()
293 wxGLContextAttrs attrs;
294 attrs.PlatformDefaults().CoreProfile().OGLVersion(4, 1).EndList();
295 _context = new wxGLContext (_canvas, nullptr, &attrs);
296 if (!_context->IsOK()) {
297 throw GLError ("Making GL context", -1);
303 /* Offset and number of indices for the things in the indices array below */
304 static constexpr int indices_video_texture_offset = 0;
305 static constexpr int indices_video_texture_number = 6;
306 static constexpr int indices_subtitle_texture_offset = indices_video_texture_offset + indices_video_texture_number;
307 static constexpr int indices_subtitle_texture_number = 6;
308 static constexpr int indices_outline_content_offset = indices_subtitle_texture_offset + indices_subtitle_texture_number;
309 static constexpr int indices_outline_content_number = 8;
311 static constexpr unsigned int indices[] = {
312 0, 1, 3, // video texture triangle #1
313 1, 2, 3, // video texture triangle #2
314 4, 5, 7, // subtitle texture triangle #1
315 5, 6, 7, // subtitle texture triangle #2
316 8, 9, // outline content line #1
317 9, 10, // outline content line #2
318 10, 11, // outline content line #3
319 11, 8, // outline content line #4
322 /* Offsets of things in the GL_ARRAY_BUFFER */
323 static constexpr int array_buffer_video_offset = 0;
324 static constexpr int array_buffer_subtitle_offset = array_buffer_video_offset + 4 * 5 * sizeof(float);
325 static constexpr int array_buffer_outline_content_offset = array_buffer_subtitle_offset + 4 * 5 * sizeof(float);
329 GLVideoView::setup_shaders ()
331 DCPOMATIC_ASSERT (_canvas);
332 DCPOMATIC_ASSERT (_context);
333 auto r = _canvas->SetCurrent (*_context);
334 DCPOMATIC_ASSERT (r);
336 #ifdef DCPOMATIC_WINDOWS
339 throw GLError(reinterpret_cast<char const*>(glewGetErrorString(r)));
343 auto get_information = [this](GLenum name) {
344 auto s = glGetString (name);
346 _information[name] = std::string (reinterpret_cast<char const *>(s));
350 get_information (GL_VENDOR);
351 get_information (GL_RENDERER);
352 get_information (GL_VERSION);
353 get_information (GL_SHADING_LANGUAGE_VERSION);
355 glGenVertexArrays(1, &_vao);
356 check_gl_error ("glGenVertexArrays");
358 glGenBuffers(1, &vbo);
359 check_gl_error ("glGenBuffers");
361 glGenBuffers(1, &ebo);
362 check_gl_error ("glGenBuffers");
364 glBindVertexArray(_vao);
365 check_gl_error ("glBindVertexArray");
367 glBindBuffer(GL_ARRAY_BUFFER, vbo);
368 check_gl_error ("glBindBuffer");
370 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
371 check_gl_error ("glBindBuffer");
372 glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
373 check_gl_error ("glBufferData");
375 /* position attribute to vertex shader (location = 0) */
376 glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), nullptr);
377 glEnableVertexAttribArray(0);
378 /* texture coord attribute to vertex shader (location = 1) */
379 glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), reinterpret_cast<void*>(3 * sizeof(float)));
380 glEnableVertexAttribArray(1);
381 check_gl_error ("glEnableVertexAttribArray");
383 auto compile = [](GLenum type, char const* source) -> GLuint {
384 auto shader = glCreateShader(type);
385 DCPOMATIC_ASSERT (shader);
386 GLchar const * src[] = { static_cast<GLchar const *>(source) };
387 glShaderSource(shader, 1, src, nullptr);
388 check_gl_error ("glShaderSource");
389 glCompileShader(shader);
390 check_gl_error ("glCompileShader");
392 glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);
395 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &log_length);
397 if (log_length > 0) {
398 char* log_char = new char[log_length];
399 glGetShaderInfoLog(shader, log_length, nullptr, log_char);
400 log = string(log_char);
403 glDeleteShader(shader);
404 throw GLError(String::compose("Could not compile shader (%1)", log).c_str(), -1);
409 auto vertex_shader = compile (GL_VERTEX_SHADER, vertex_source);
410 auto fragment_shader = compile (GL_FRAGMENT_SHADER, fragment_source);
412 auto program = glCreateProgram();
413 check_gl_error ("glCreateProgram");
414 glAttachShader (program, vertex_shader);
415 check_gl_error ("glAttachShader");
416 glAttachShader (program, fragment_shader);
417 check_gl_error ("glAttachShader");
418 glLinkProgram (program);
419 check_gl_error ("glLinkProgram");
421 glGetProgramiv (program, GL_LINK_STATUS, &ok);
424 glGetProgramiv(program, GL_INFO_LOG_LENGTH, &log_length);
426 if (log_length > 0) {
427 char* log_char = new char[log_length];
428 glGetProgramInfoLog(program, log_length, nullptr, log_char);
429 log = string(log_char);
432 glDeleteProgram (program);
433 throw GLError(String::compose("Could not link shader (%1)", log).c_str(), -1);
435 glDeleteShader (vertex_shader);
436 glDeleteShader (fragment_shader);
438 glUseProgram (program);
440 _fragment_type = glGetUniformLocation (program, "type");
441 check_gl_error ("glGetUniformLocation");
442 set_outline_content_colour (program);
444 auto conversion = dcp::ColourConversion::rec709_to_xyz();
445 boost::numeric::ublas::matrix<double> matrix = conversion.xyz_to_rgb ();
446 GLfloat gl_matrix[] = {
447 static_cast<float>(matrix(0, 0)), static_cast<float>(matrix(0, 1)), static_cast<float>(matrix(0, 2)), 0.0f,
448 static_cast<float>(matrix(1, 0)), static_cast<float>(matrix(1, 1)), static_cast<float>(matrix(1, 2)), 0.0f,
449 static_cast<float>(matrix(2, 0)), static_cast<float>(matrix(2, 1)), static_cast<float>(matrix(2, 2)), 0.0f,
450 0.0f, 0.0f, 0.0f, 1.0f
453 auto colour_conversion = glGetUniformLocation (program, "colour_conversion");
454 check_gl_error ("glGetUniformLocation");
455 glUniformMatrix4fv (colour_conversion, 1, GL_TRUE, gl_matrix);
458 check_gl_error ("glLineWidth");
460 check_gl_error ("glEnable");
461 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
462 check_gl_error ("glBlendFunc");
464 /* Reserve space for the GL_ARRAY_BUFFER */
465 glBufferData(GL_ARRAY_BUFFER, 12 * 5 * sizeof(float), nullptr, GL_STATIC_DRAW);
466 check_gl_error ("glBufferData");
471 GLVideoView::set_outline_content_colour (GLuint program)
473 auto uniform = glGetUniformLocation (program, "outline_content_colour");
474 check_gl_error ("glGetUniformLocation");
475 auto colour = outline_content_colour ();
476 glUniform4f (uniform, colour.Red() / 255.0f, colour.Green() / 255.0f, colour.Blue() / 255.0f, 1.0f);
477 check_gl_error ("glUniform4f");
484 auto pad = pad_colour();
485 glClearColor(pad.Red() / 255.0, pad.Green() / 255.0, pad.Blue() / 255.0, 1.0);
486 glClear (GL_COLOR_BUFFER_BIT);
487 check_gl_error ("glClear");
489 auto const size = _canvas_size.load();
490 int const width = size.GetWidth();
491 int const height = size.GetHeight();
493 if (width < 64 || height < 0) {
497 glViewport (0, 0, width, height);
498 check_gl_error ("glViewport");
500 glBindVertexArray(_vao);
501 check_gl_error ("glBindVertexArray");
502 glUniform1i(_fragment_type, static_cast<GLint>(_optimise_for_j2k ? FragmentType::XYZ_IMAGE : FragmentType::RGB_IMAGE));
503 _video_texture->bind();
504 glDrawElements (GL_TRIANGLES, indices_video_texture_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_video_texture_offset * sizeof(int)));
505 if (_have_subtitle_to_render) {
506 glUniform1i(_fragment_type, static_cast<GLint>(FragmentType::RGB_IMAGE));
507 _subtitle_texture->bind();
508 glDrawElements (GL_TRIANGLES, indices_subtitle_texture_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_subtitle_texture_offset * sizeof(int)));
510 if (_viewer->outline_content()) {
511 glUniform1i(_fragment_type, static_cast<GLint>(FragmentType::OUTLINE_CONTENT));
512 glDrawElements (GL_LINES, indices_outline_content_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_outline_content_offset * sizeof(int)));
513 check_gl_error ("glDrawElements");
517 check_gl_error ("glFlush");
519 _canvas->SwapBuffers();
524 GLVideoView::set_image (shared_ptr<const PlayerVideo> pv)
526 shared_ptr<const Image> video = _optimise_for_j2k ? pv->raw_image() : pv->image(boost::bind(&PlayerVideo::force, AV_PIX_FMT_RGB24), VideoRange::FULL, true);
528 /* Only the player's black frames should be aligned at this stage, so this should
529 * almost always have no work to do.
531 video = Image::ensure_alignment (video, Image::Alignment::COMPACT);
533 /** If _optimise_for_j2k is true we render a XYZ image, doing the colourspace
534 * conversion, scaling and video range conversion in the GL shader.
535 * Otherwise we render a RGB image without any shader-side processing.
538 /* XXX: video range conversion */
540 _video_texture->set (video);
542 auto const text = pv->text();
543 _have_subtitle_to_render = static_cast<bool>(text) && _optimise_for_j2k;
544 if (_have_subtitle_to_render) {
545 /* opt: only do this if it's a new subtitle? */
546 DCPOMATIC_ASSERT (text->image->alignment() == Image::Alignment::COMPACT);
547 _subtitle_texture->set (text->image);
551 auto const canvas_size = _canvas_size.load();
552 int const canvas_width = canvas_size.GetWidth();
553 int const canvas_height = canvas_size.GetHeight();
554 auto const inter_position = player_video().first->inter_position();
555 auto const inter_size = player_video().first->inter_size();
556 auto const out_size = player_video().first->out_size();
558 auto x_offset = std::max(0, (canvas_width - out_size.width) / 2);
559 auto y_offset = std::max(0, (canvas_height - out_size.height) / 2);
561 _last_canvas_size.set_next (canvas_size);
562 _last_video_size.set_next (video->size());
563 _last_inter_position.set_next (inter_position);
564 _last_inter_size.set_next (inter_size);
565 _last_out_size.set_next (out_size);
570 Rectangle (wxSize canvas_size, float x, float y, dcp::Size size)
571 : _canvas_size (canvas_size)
573 auto const x1 = x_pixels_to_gl(x);
574 auto const y1 = y_pixels_to_gl(y);
575 auto const x2 = x_pixels_to_gl(x + size.width);
576 auto const y2 = y_pixels_to_gl(y + size.height);
578 /* The texture coordinates here have to account for the fact that when we put images into the texture OpenGL
579 * expected us to start at the lower left but we actually started at the top left. So although the
580 * top of the texture is at 1.0 we pretend it's the other way round.
600 _vertices[12] = 0.0f;
601 _vertices[13] = 0.0f;
602 _vertices[14] = 0.0f;
607 _vertices[17] = 0.0f;
608 _vertices[18] = 0.0f;
609 _vertices[19] = 1.0f;
612 float const * vertices () const {
616 int const size () const {
617 return sizeof(_vertices);
621 /* @param x x position in pixels where 0 is left and canvas_width is right on screen */
622 float x_pixels_to_gl(int x) const {
623 return (x * 2.0f / _canvas_size.GetWidth()) - 1.0f;
626 /* @param y y position in pixels where 0 is top and canvas_height is bottom on screen */
627 float y_pixels_to_gl(int y) const {
628 return 1.0f - (y * 2.0f / _canvas_size.GetHeight());
635 if (_last_canvas_size.changed() || _last_inter_position.changed() || _last_inter_size.changed() || _last_out_size.changed()) {
637 const auto video = _optimise_for_j2k ?
638 Rectangle(canvas_size, inter_position.x + x_offset, inter_position.y + y_offset, inter_size)
639 : Rectangle(canvas_size, x_offset, y_offset, out_size);
641 glBufferSubData (GL_ARRAY_BUFFER, array_buffer_video_offset, video.size(), video.vertices());
642 check_gl_error ("glBufferSubData (video)");
644 const auto outline_content = Rectangle(canvas_size, inter_position.x + x_offset, inter_position.y + y_offset, inter_size);
645 glBufferSubData (GL_ARRAY_BUFFER, array_buffer_outline_content_offset, outline_content.size(), outline_content.vertices());
646 check_gl_error ("glBufferSubData (outline_content)");
649 if (_have_subtitle_to_render) {
650 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());
651 glBufferSubData (GL_ARRAY_BUFFER, array_buffer_subtitle_offset, subtitle.size(), subtitle.vertices());
652 check_gl_error ("glBufferSubData (subtitle)");
655 /* opt: where should these go? */
657 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
658 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
659 check_gl_error ("glTexParameteri");
661 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
662 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
663 check_gl_error ("glTexParameterf");
668 GLVideoView::start ()
672 boost::mutex::scoped_lock lm (_playing_mutex);
674 _thread_work_condition.notify_all ();
680 boost::mutex::scoped_lock lm (_playing_mutex);
686 GLVideoView::thread_playing ()
688 if (length() != dcpomatic::DCPTime()) {
689 auto const next = position() + one_video_frame();
691 if (next >= length()) {
692 _viewer->finished ();
696 get_next_frame (false);
697 set_image_and_draw ();
701 optional<int> n = time_until_next_frame();
705 get_next_frame (true);
712 GLVideoView::set_image_and_draw ()
714 auto pv = player_video().first;
722 _viewer->image_changed (pv);
728 GLVideoView::thread ()
731 start_of_thread ("GLVideoView");
733 #if defined(DCPOMATIC_OSX)
734 /* Without this we see errors like
735 * ../src/osx/cocoa/glcanvas.mm(194): assert ""context"" failed in SwapBuffers(): should have current context [in thread 700006970000]
737 WXGLSetCurrentContext (_context->GetWXGLContext());
739 if (!_setup_shaders_done) {
741 _setup_shaders_done = true;
745 #if defined(DCPOMATIC_LINUX) && defined(DCPOMATIC_HAVE_GLX_SWAP_INTERVAL_EXT)
746 if (_canvas->IsExtensionSupported("GLX_EXT_swap_control")) {
748 Display* dpy = wxGetX11Display();
749 glXSwapIntervalEXT (dpy, DefaultScreen(dpy), 1);
750 _vsync_enabled = true;
754 #ifdef DCPOMATIC_WINDOWS
755 if (_canvas->IsExtensionSupported("WGL_EXT_swap_control")) {
757 PFNWGLSWAPINTERVALEXTPROC swap = (PFNWGLSWAPINTERVALEXTPROC) wglGetProcAddress("wglSwapIntervalEXT");
760 _vsync_enabled = true;
768 GLint swapInterval = 1;
769 CGLSetParameter (CGLGetCurrentContext(), kCGLCPSwapInterval, &swapInterval);
770 _vsync_enabled = true;
773 _video_texture.reset(new Texture(_optimise_for_j2k ? 2 : 1));
774 _subtitle_texture.reset(new Texture(1));
777 boost::mutex::scoped_lock lm (_playing_mutex);
778 while (!_playing && !_one_shot) {
779 _thread_work_condition.wait (lm);
785 } else if (_one_shot) {
787 set_image_and_draw ();
790 boost::this_thread::interruption_point ();
791 dcpomatic_sleep_milliseconds (time_until_next_frame().get_value_or(0));
794 /* XXX: leaks _context, but that seems preferable to deleting it here
795 * without also deleting the wxGLCanvas.
804 VideoView::NextFrameResult
805 GLVideoView::display_next_frame (bool non_blocking)
807 NextFrameResult const r = get_next_frame (non_blocking);
814 GLVideoView::request_one_shot ()
816 boost::mutex::scoped_lock lm (_playing_mutex);
818 _thread_work_condition.notify_all ();
822 Texture::Texture (GLint unpack_alignment)
823 : _unpack_alignment (unpack_alignment)
825 glGenTextures (1, &_name);
826 check_gl_error ("glGenTextures");
832 glDeleteTextures (1, &_name);
839 glBindTexture(GL_TEXTURE_2D, _name);
840 check_gl_error ("glBindTexture");
845 Texture::set (shared_ptr<const Image> image)
847 auto const create = !_size || image->size() != _size;
848 _size = image->size();
850 glPixelStorei (GL_UNPACK_ALIGNMENT, _unpack_alignment);
851 check_gl_error ("glPixelStorei");
853 DCPOMATIC_ASSERT (image->alignment() == Image::Alignment::COMPACT);
855 GLint internal_format;
859 switch (image->pixel_format()) {
860 case AV_PIX_FMT_BGRA:
861 internal_format = GL_RGBA8;
863 type = GL_UNSIGNED_BYTE;
865 case AV_PIX_FMT_RGBA:
866 internal_format = GL_RGBA8;
868 type = GL_UNSIGNED_BYTE;
870 case AV_PIX_FMT_RGB24:
871 internal_format = GL_RGBA8;
873 type = GL_UNSIGNED_BYTE;
875 case AV_PIX_FMT_XYZ12:
876 internal_format = GL_RGBA12;
878 type = GL_UNSIGNED_SHORT;
881 throw PixelFormatError ("Texture::set", image->pixel_format());
887 glTexImage2D (GL_TEXTURE_2D, 0, internal_format, _size->width, _size->height, 0, format, type, image->data()[0]);
888 check_gl_error ("glTexImage2D");
890 glTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, _size->width, _size->height, format, type, image->data()[0]);
891 check_gl_error ("glTexSubImage2D");