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/>.
22 #include "lib/image.h"
23 #include "lib/dcpomatic_assert.h"
24 #include <boost/bind.hpp>
28 #include <OpenGL/glu.h>
29 #include <OpenGL/glext.h>
36 using boost::shared_ptr;
38 GLView::GLView (wxWindow *parent)
39 : wxGLCanvas (parent, wxID_ANY, 0, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE)
41 _context = new wxGLContext (this);
42 Bind (wxEVT_PAINT, boost::bind(&GLView::paint, this, _1));
44 glGenTextures (1, &_id);
45 glBindTexture (GL_TEXTURE_2D, _id);
46 glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
51 glDeleteTextures (1, &_id);
56 check_gl_error (char const * last)
58 GLenum const e = glGetError ();
59 if (e != GL_NO_ERROR) {
60 cout << last << " failed " << e << " (";
61 if (e == GL_INVALID_VALUE) {
62 cout << "invalid value";
63 } else if (e == GL_INVALID_ENUM) {
64 cout << "invalid enum";
73 GLView::paint (wxPaintEvent &)
75 SetCurrent (*_context);
77 glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
78 check_gl_error ("glClear");
80 glClearColor (0.0f, 0.0f, 0.0f, 1.0f);
81 check_gl_error ("glClearColor");
82 glEnable (GL_TEXTURE_2D);
83 check_gl_error ("glEnable GL_TEXTURE_2D");
84 glEnable (GL_COLOR_MATERIAL);
85 check_gl_error ("glEnable GL_COLOR_MATERIAL");
87 check_gl_error ("glEnable GL_BLEND");
88 glDisable (GL_DEPTH_TEST);
89 check_gl_error ("glDisable GL_DEPTH_TEST");
90 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
92 glViewport (0, 0, GetSize().x, GetSize().y);
93 glMatrixMode (GL_PROJECTION);
96 gluOrtho2D (0, GetSize().x, GetSize().y, 0);
97 glMatrixMode (GL_MODELVIEW);
100 glTranslatef (0, 0, 0);
106 glVertex2f (0, _size->height);
108 glVertex2f (_size->width, _size->height);
110 glVertex2f (_size->width, 0);
122 GLView::set_image (shared_ptr<const Image> image)
124 DCPOMATIC_ASSERT (image->pixel_format() == AV_PIX_FMT_RGB24);
125 DCPOMATIC_ASSERT (!image->aligned());
127 _size = image->size ();
128 cout << "Here we go with " << _size.width << "x" << _size.height << "\n";
129 glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
130 glTexImage2D (GL_TEXTURE_2D, 0, GL_RGB8, _size.width, _size.height, 0, GL_RGB, GL_UNSIGNED_BYTE, image->data()[0]);
131 check_gl_error ("glTexImage2D");
133 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
134 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
135 check_gl_error ("glTexParameteri");
137 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
138 glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
139 check_gl_error ("glTexParameterf");