2 Copyright (C) 2018-2019 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/>.
21 #include "gl_video_view.h"
22 #include "film_viewer.h"
23 #include "lib/image.h"
24 #include "lib/dcpomatic_assert.h"
25 #include "lib/exceptions.h"
26 #include "lib/cross.h"
27 #include "lib/player_video.h"
28 #include <boost/bind.hpp>
32 #include <OpenGL/glu.h>
33 #include <OpenGL/glext.h>
34 #include <OpenGL/CGLTypes.h>
35 #include <OpenGL/OpenGL.h>
38 #ifdef DCPOMATIC_LINUX
41 #include <GL/glxext.h>
44 #ifdef DCPOMATIC_WINDOWS
47 #include <GL/wglext.h>
51 using boost::shared_ptr;
52 using boost::optional;
54 GLVideoView::GLVideoView (FilmViewer* viewer, wxWindow *parent)
56 , _vsync_enabled (false)
61 _canvas = new wxGLCanvas (parent, wxID_ANY, 0, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE);
62 _canvas->Bind (wxEVT_PAINT, boost::bind(&GLVideoView::paint, this));
63 _canvas->Bind (wxEVT_SIZE, boost::bind(boost::ref(Sized)));
64 _canvas->Bind (wxEVT_CREATE, boost::bind(&GLVideoView::create, this));
66 #if defined(DCPOMATIC_LINUX) && defined(DCPOMATIC_HAVE_GLX_SWAP_INTERVAL_EXT)
67 if (_canvas->IsExtensionSupported("GLX_EXT_swap_control")) {
69 Display* dpy = wxGetX11Display();
70 glXSwapIntervalEXT (dpy, DefaultScreen(dpy), 1);
71 _vsync_enabled = true;
75 #ifdef DCPOMATIC_WINDOWS
76 if (_canvas->IsExtensionSupported("WGL_EXT_swap_control")) {
78 PFNWGLSWAPINTERVALEXTPROC swap = (PFNWGLSWAPINTERVALEXTPROC) wglGetProcAddress("wglSwapIntervalEXT");
81 _vsync_enabled = true;
89 GLint swapInterval = 1;
90 CGLSetParameter (CGLGetCurrentContext(), kCGLCPSwapInterval, &swapInterval);
91 _vsync_enabled = true;
94 glGenTextures (1, &_id);
95 glBindTexture (GL_TEXTURE_2D, _id);
96 glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
99 GLVideoView::~GLVideoView ()
101 _thread->interrupt ();
105 glDeleteTextures (1, &_id);
109 check_gl_error (char const * last)
111 GLenum const e = glGetError ();
112 if (e != GL_NO_ERROR) {
113 throw GLError (last, e);
118 GLVideoView::paint ()
124 GLVideoView::update ()
126 if (!_canvas->IsShownOnScreen()) {
130 // wxClientDC dc (_canvas);
137 glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
138 check_gl_error ("glClear");
140 glClearColor (0.0f, 0.0f, 0.0f, 1.0f);
141 check_gl_error ("glClearColor");
142 glEnable (GL_TEXTURE_2D);
143 check_gl_error ("glEnable GL_TEXTURE_2D");
145 check_gl_error ("glEnable GL_BLEND");
146 glDisable (GL_DEPTH_TEST);
147 check_gl_error ("glDisable GL_DEPTH_TEST");
148 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
150 if (_canvas->GetSize().x < 64 || _canvas->GetSize().y < 0) {
154 glViewport (0, 0, _canvas->GetSize().x, _canvas->GetSize().y);
155 check_gl_error ("glViewport");
156 glMatrixMode (GL_PROJECTION);
159 gluOrtho2D (0, _canvas->GetSize().x, _canvas->GetSize().y, 0);
160 check_gl_error ("gluOrtho2d");
161 glMatrixMode (GL_MODELVIEW);
164 glTranslatef (0, 0, 0);
166 dcp::Size const out_size = _viewer->out_size ();
169 /* Render our image (texture) */
172 glVertex2f (0, _size->height);
174 glVertex2f (_size->width, _size->height);
176 glVertex2f (_size->width, 0);
181 /* No image, so just fill with black */
183 glColor3ub (0, 0, 0);
185 glVertex2f (out_size.width, 0);
186 glVertex2f (out_size.width, out_size.height);
187 glVertex2f (0, out_size.height);
192 wxSize const canvas_size = _canvas->GetSize ();
194 if (!_viewer->pad_black() && out_size.width < canvas_size.GetWidth()) {
196 /* XXX: these colours are right for GNOME; may need adjusting for other OS */
197 glColor3ub (240, 240, 240);
198 glVertex2f (out_size.width, 0);
199 glVertex2f (canvas_size.GetWidth(), 0);
200 glVertex2f (canvas_size.GetWidth(), canvas_size.GetHeight());
201 glVertex2f (out_size.width, canvas_size.GetHeight());
203 glColor3ub (255, 255, 255);
206 if (!_viewer->pad_black() && out_size.height < canvas_size.GetHeight()) {
207 glColor3ub (240, 240, 240);
208 int const gap = (canvas_size.GetHeight() - out_size.height) / 2;
211 glVertex2f (canvas_size.GetWidth(), 0);
212 glVertex2f (canvas_size.GetWidth(), gap);
216 glVertex2f (0, gap + out_size.height + 1);
217 glVertex2f (canvas_size.GetWidth(), gap + out_size.height + 1);
218 glVertex2f (canvas_size.GetWidth(), 2 * gap + out_size.height + 2);
219 glVertex2f (0, 2 * gap + out_size.height + 2);
221 glColor3ub (255, 255, 255);
224 if (_viewer->outline_content()) {
225 glColor3ub (255, 0, 0);
226 glBegin (GL_LINE_LOOP);
227 Position<int> inter_position = _viewer->inter_position ();
228 dcp::Size inter_size = _viewer->inter_size ();
229 glVertex2f (inter_position.x, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2);
230 glVertex2f (inter_position.x + inter_size.width, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2);
231 glVertex2f (inter_position.x + inter_size.width, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2 + inter_size.height);
232 glVertex2f (inter_position.x, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2 + inter_size.height);
234 glColor3ub (255, 255, 255);
238 _canvas->SwapBuffers();
242 GLVideoView::set_image (shared_ptr<const Image> image)
245 _size = optional<dcp::Size>();
249 DCPOMATIC_ASSERT (image->pixel_format() == AV_PIX_FMT_RGB24);
250 DCPOMATIC_ASSERT (!image->aligned());
252 _size = image->size ();
253 glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
254 check_gl_error ("glPixelStorei");
255 glTexImage2D (GL_TEXTURE_2D, 0, GL_RGB8, _size->width, _size->height, 0, GL_RGB, GL_UNSIGNED_BYTE, image->data()[0]);
256 check_gl_error ("glTexImage2D");
258 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
259 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
260 check_gl_error ("glTexParameteri");
262 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
263 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
264 check_gl_error ("glTexParameterf");
268 GLVideoView::start ()
270 boost::mutex::scoped_lock lm (_playing_mutex);
272 _playing_condition.notify_all ();
278 boost::mutex::scoped_lock lm (_playing_mutex);
283 GLVideoView::thread ()
286 /* XXX_b: check all calls and signal emissions in this method & protect them if necessary */
287 _context = new wxGLContext (_canvas);
288 _canvas->SetCurrent (*_context);
291 boost::mutex::scoped_lock lm (_playing_mutex);
292 while (!_playing && !_one_shot) {
293 _playing_condition.wait (lm);
298 if (length() != dcpomatic::DCPTime()) {
299 dcpomatic::DCPTime const next = position() + one_video_frame();
301 if (next >= length()) {
303 _viewer->emit_finished ();
307 get_next_frame (false);
308 set_image (player_video().first->image(bind(&PlayerVideo::force, _1, AV_PIX_FMT_RGB24), false, true));
312 while (time_until_next_frame() < 5) {
313 get_next_frame (true);
316 boost::this_thread::interruption_point ();
317 dcpomatic_sleep_milliseconds (time_until_next_frame());
322 catch (boost::thread_interrupted& e)
324 /* XXX_b: store exceptions here */
330 GLVideoView::display_next_frame (bool non_blocking)
332 bool const r = get_next_frame (non_blocking);
338 GLVideoView::request_one_shot ()
340 boost::mutex::scoped_lock lm (_playing_mutex);
342 _playing_condition.notify_all ();
346 GLVideoView::create ()
349 _thread = new boost::thread (boost::bind(&GLVideoView::thread, this));