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//
// Class Fl_Wayland_Gl_Window_Driver for the Fast Light Tool Kit (FLTK).
//
// Copyright 2021-2022 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#ifndef FL_WINAPI_GL_WINDOW_DRIVER_H
#define FL_WINAPI_GL_WINDOW_DRIVER_H
#include <config.h>
#if HAVE_GL
#include <FL/platform.H>
#include "../../Fl_Gl_Window_Driver.H"
#include <FL/gl.h>
/* Implementation note about OpenGL drawing on the Wayland platform
After eglCreateWindowSurface() with attributes {EGL_RENDER_BUFFER, EGL_SINGLE_BUFFER, EGL_NONE},
eglQueryContext() reports that EGL_RENDER_BUFFER equals EGL_BACK_BUFFER.
This experiment suggests that the platform only supports double-buffer drawing.
Consequently, FL_DOUBLE is enforced in all Fl_Gl_Window::mode_ values under Wayland.
*/
class Fl_WinAPI_Gl_Window_Driver : public Fl_Gl_Window_Driver {
friend Fl_Gl_Window_Driver* Fl_Gl_Window_Driver::newGlWindowDriver(Fl_Gl_Window *);
Fl_WinAPI_Gl_Window_Driver(Fl_Gl_Window *win) : Fl_Gl_Window_Driver(win) {}
float pixels_per_unit() FL_OVERRIDE;
int mode_(int m, const int *a) FL_OVERRIDE;
void make_current_after() FL_OVERRIDE;
void swap_buffers() FL_OVERRIDE;
void invalidate() FL_OVERRIDE {}
int flush_begin(char& valid_f) FL_OVERRIDE;
Fl_Gl_Choice *find(int m, const int *alistp) FL_OVERRIDE;
GLContext create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g) FL_OVERRIDE;
GLContext do_create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g,
int layer);
void set_gl_context(Fl_Window* w, GLContext context) FL_OVERRIDE;
void delete_gl_context(GLContext) FL_OVERRIDE;
void make_overlay_current() FL_OVERRIDE;
void redraw_overlay() FL_OVERRIDE;
void* GetProcAddress(const char *procName) FL_OVERRIDE;
void draw_string_legacy(const char* str, int n) FL_OVERRIDE;
void gl_bitmap_font(Fl_Font_Descriptor *fl_fontsize) FL_OVERRIDE;
void get_list(Fl_Font_Descriptor *fd, int r) FL_OVERRIDE;
int genlistsize() FL_OVERRIDE;
void switch_to_GL1() FL_OVERRIDE;
void switch_back() FL_OVERRIDE;
#if HAVE_GL_OVERLAY
void gl_hide_before(void *& overlay) FL_OVERRIDE;
int can_do_overlay() FL_OVERRIDE;
int overlay_color(Fl_Color i) FL_OVERRIDE;
void make_overlay(void*&overlay) FL_OVERRIDE;
#endif
};
#endif // HAVE_GL
#endif // FL_WINAPI_GL_WINDOW_DRIVER_H
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