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/*
Copyright (C) 2025 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DCPOMATIC_GL_UTIL_H
#define DCPOMATIC_GL_UTIL_H
#include <dcp/types.h>
#include <wx/wx.h>
/* This will only build on an new-enough wxWidgets: see the comment in gl_video_view.h */
#if wxCHECK_VERSION(3,1,0)
#ifdef DCPOMATIC_OSX
#define GL_DO_NOT_WARN_IF_MULTI_GL_VERSION_HEADERS_INCLUDED
#include <OpenGL/OpenGL.h>
#include <OpenGL/gl3.h>
#endif
#ifdef DCPOMATIC_LINUX
#include <GL/glu.h>
#include <GL/glext.h>
#endif
#ifdef DCPOMATIC_WINDOWS
#include <GL/glu.h>
#include <GL/wglext.h>
#endif
class Image;
namespace dcpomatic {
namespace gl {
extern GLuint compile_shader(GLenum type, char const* source);
extern void check_gl_error(char const* last);
class Texture
{
public:
/** @param unit Unit, or index, of this texture (from 0 to GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS - 1) */
Texture(GLint unpack_alignment, int unit = 0);
~Texture();
Texture(Texture const&) = delete;
Texture& operator=(Texture const&) = delete;
Texture(Texture&&);
Texture& operator=(Texture&&);
void bind();
void set(std::shared_ptr<const Image> image, int component = 0);
private:
GLuint _name;
GLint _unpack_alignment;
int _unit;
boost::optional<dcp::Size> _size;
};
class Coords
{
public:
class Rectangle
{
public:
Rectangle(Coords& coords, int node, int index);
virtual void draw() = 0;
void set(wxSize canvas_size, int x, int y, dcp::Size size);
void set(wxSize canvas_size, int x, int y, wxSize size);
int index() const {
return _index;
}
protected:
Coords& _coords;
int _node;
int _index;
};
class FilledRectangle : public Rectangle
{
public:
FilledRectangle(Coords& coords);
void draw() override;
};
class OutlineRectangle : public Rectangle
{
public:
OutlineRectangle(Coords& coords);
void draw() override;
};
class FilledRectangleGroup
{
public:
void add(FilledRectangle const& rectangle);
void draw();
private:
int _index = -1;
int _number = 0;
};
FilledRectangle add_filled_rectangle();
OutlineRectangle add_outline_rectangle();
void setup();
void set_array_buffer();
private:
friend class Rectangle;
bool _setup = false;
int _nodes = 0;
std::vector<unsigned int> _indices;
std::vector<float> _coords;
};
class Uniform
{
public:
void setup(int program, char const* name);
protected:
int _location = -1;
};
class UniformVec4f : public Uniform
{
public:
void set(float a, float b, float c, float d);
};
class Uniform1i : public Uniform
{
public:
void set(int v);
};
}
}
#endif
#endif
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