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 <boost/bind.hpp>
30 #include <OpenGL/glu.h>
31 #include <OpenGL/glext.h>
38 using boost::shared_ptr;
39 using boost::optional;
41 GLVideoView::GLVideoView (FilmViewer* viewer, wxWindow *parent)
44 _canvas = new wxGLCanvas (parent, wxID_ANY, 0, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE);
45 _context = new wxGLContext (_canvas);
46 _canvas->Bind (wxEVT_PAINT, boost::bind(&GLVideoView::paint, this));
47 _canvas->Bind (wxEVT_SIZE, boost::bind(boost::ref(Sized)));
49 glGenTextures (1, &_id);
50 glBindTexture (GL_TEXTURE_2D, _id);
51 glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
54 GLVideoView::~GLVideoView ()
56 glDeleteTextures (1, &_id);
61 check_gl_error (char const * last)
63 GLenum const e = glGetError ();
64 if (e != GL_NO_ERROR) {
65 throw GLError (last, e);
72 _canvas->SetCurrent (*_context);
73 wxPaintDC dc (_canvas);
78 GLVideoView::update ()
80 if (!_canvas->IsShownOnScreen()) {
83 wxClientDC dc (_canvas);
90 glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
91 check_gl_error ("glClear");
93 glClearColor (0.0f, 0.0f, 0.0f, 1.0f);
94 check_gl_error ("glClearColor");
95 glEnable (GL_TEXTURE_2D);
96 check_gl_error ("glEnable GL_TEXTURE_2D");
98 check_gl_error ("glEnable GL_BLEND");
99 glDisable (GL_DEPTH_TEST);
100 check_gl_error ("glDisable GL_DEPTH_TEST");
101 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
103 if (_canvas->GetSize().x < 64 || _canvas->GetSize().y < 0) {
107 glViewport (0, 0, _canvas->GetSize().x, _canvas->GetSize().y);
108 check_gl_error ("glViewport");
109 glMatrixMode (GL_PROJECTION);
112 gluOrtho2D (0, _canvas->GetSize().x, _canvas->GetSize().y, 0);
113 check_gl_error ("gluOrtho2d");
114 glMatrixMode (GL_MODELVIEW);
117 glTranslatef (0, 0, 0);
123 glVertex2f (0, _size->height);
125 glVertex2f (_size->width, _size->height);
127 glVertex2f (_size->width, 0);
134 dcp::Size const out_size = _viewer->out_size ();
135 wxSize const canvas_size = _canvas->GetSize ();
137 if (!_viewer->pad_black() && out_size.width < canvas_size.GetWidth()) {
139 /* XXX: these colours are right for GNOME; may need adjusting for other OS */
140 glColor3ub (240, 240, 240);
141 glVertex2f (out_size.width, 0);
142 glVertex2f (canvas_size.GetWidth(), 0);
143 glVertex2f (canvas_size.GetWidth(), canvas_size.GetHeight());
144 glVertex2f (out_size.width, canvas_size.GetHeight());
146 glColor3ub (255, 255, 255);
149 if (!_viewer->pad_black() && out_size.height < canvas_size.GetHeight()) {
150 glColor3ub (240, 240, 240);
151 int const gap = (canvas_size.GetHeight() - out_size.height) / 2;
154 glVertex2f (canvas_size.GetWidth(), 0);
155 glVertex2f (canvas_size.GetWidth(), gap);
159 glVertex2f (0, gap + out_size.height + 1);
160 glVertex2f (canvas_size.GetWidth(), gap + out_size.height + 1);
161 glVertex2f (canvas_size.GetWidth(), 2 * gap + out_size.height + 2);
162 glVertex2f (0, 2 * gap + out_size.height + 2);
164 glColor3ub (255, 255, 255);
167 if (_viewer->outline_content()) {
168 glColor3ub (255, 0, 0);
169 glBegin (GL_LINE_LOOP);
170 Position<int> inter_position = _viewer->inter_position ();
171 dcp::Size inter_size = _viewer->inter_size ();
172 glVertex2f (inter_position.x, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2);
173 glVertex2f (inter_position.x + inter_size.width, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2);
174 glVertex2f (inter_position.x + inter_size.width, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2 + inter_size.height);
175 glVertex2f (inter_position.x, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2 + inter_size.height);
177 glColor3ub (255, 255, 255);
181 _canvas->SwapBuffers();
185 GLVideoView::set_image (shared_ptr<const Image> image)
188 _size = optional<dcp::Size>();
192 DCPOMATIC_ASSERT (image->pixel_format() == AV_PIX_FMT_RGB24);
193 DCPOMATIC_ASSERT (!image->aligned());
195 _size = image->size ();
196 glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
197 check_gl_error ("glPixelStorei");
198 glTexImage2D (GL_TEXTURE_2D, 0, GL_RGB8, _size->width, _size->height, 0, GL_RGB, GL_UNSIGNED_BYTE, image->data()[0]);
199 check_gl_error ("glTexImage2D");
201 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
202 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
203 check_gl_error ("glTexParameteri");
205 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
206 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
207 check_gl_error ("glTexParameterf");