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 glViewport (0, 0, _canvas->GetSize().x, _canvas->GetSize().y);
104 glMatrixMode (GL_PROJECTION);
107 gluOrtho2D (0, _canvas->GetSize().x, _canvas->GetSize().y, 0);
108 glMatrixMode (GL_MODELVIEW);
111 glTranslatef (0, 0, 0);
117 glVertex2f (0, _size->height);
119 glVertex2f (_size->width, _size->height);
121 glVertex2f (_size->width, 0);
128 glDisable (GL_TEXTURE_2D);
129 check_gl_error ("glDisable GL_TEXTURE_2D");
131 dcp::Size const out_size = _viewer->out_size ();
132 wxSize const canvas_size = _canvas->GetSize ();
134 if (!_viewer->pad_black() && out_size.width < canvas_size.GetWidth()) {
136 /* XXX: these colours are right for GNOME; may need adjusting for other OS */
137 glColor3ub (240, 240, 240);
138 glVertex2f (out_size.width, 0);
139 glVertex2f (canvas_size.GetWidth(), 0);
140 glVertex2f (canvas_size.GetWidth(), canvas_size.GetHeight());
141 glVertex2f (out_size.width, canvas_size.GetHeight());
143 glColor3ub (255, 255, 255);
146 if (!_viewer->pad_black() && out_size.height < canvas_size.GetHeight()) {
147 glColor3ub (240, 240, 240);
148 int const gap = (canvas_size.GetHeight() - out_size.height) / 2;
151 glVertex2f (canvas_size.GetWidth(), 0);
152 glVertex2f (canvas_size.GetWidth(), gap);
156 glVertex2f (0, gap + out_size.height + 1);
157 glVertex2f (canvas_size.GetWidth(), gap + out_size.height + 1);
158 glVertex2f (canvas_size.GetWidth(), 2 * gap + out_size.height + 2);
159 glVertex2f (0, 2 * gap + out_size.height + 2);
161 glColor3ub (255, 255, 255);
164 if (_viewer->outline_content()) {
165 glColor3ub (255, 0, 0);
166 glBegin (GL_LINE_LOOP);
167 Position<int> inter_position = _viewer->inter_position ();
168 dcp::Size inter_size = _viewer->inter_size ();
169 glVertex2f (inter_position.x, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2);
170 glVertex2f (inter_position.x + inter_size.width, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2);
171 glVertex2f (inter_position.x + inter_size.width, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2 + inter_size.height);
172 glVertex2f (inter_position.x, inter_position.y + (canvas_size.GetHeight() - out_size.height) / 2 + inter_size.height);
174 glColor3ub (255, 255, 255);
178 _canvas->SwapBuffers();
182 GLVideoView::set_image (shared_ptr<const Image> image)
185 _size = optional<dcp::Size>();
189 DCPOMATIC_ASSERT (image->pixel_format() == AV_PIX_FMT_RGB24);
190 DCPOMATIC_ASSERT (!image->aligned());
192 _size = image->size ();
193 glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
194 glTexImage2D (GL_TEXTURE_2D, 0, GL_RGB8, _size->width, _size->height, 0, GL_RGB, GL_UNSIGNED_BYTE, image->data()[0]);
195 check_gl_error ("glTexImage2D");
197 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
198 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
199 check_gl_error ("glTexParameteri");
201 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
202 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
203 check_gl_error ("glTexParameterf");