69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
//
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// Class Fl_Wayland_Gl_Window_Driver for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 2021-2023 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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#ifndef FL_WAYLAND_GL_WINDOW_DRIVER_H
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#define FL_WAYLAND_GL_WINDOW_DRIVER_H
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#include <config.h>
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#if HAVE_GL
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#include "../../Fl_Gl_Window_Driver.H"
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#include <wayland-egl.h>
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#include <EGL/egl.h>
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#include <FL/gl.h>
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/* Implementation note about OpenGL drawing on the Wayland platform
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After eglCreateWindowSurface() with attributes {EGL_RENDER_BUFFER, EGL_SINGLE_BUFFER, EGL_NONE},
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eglQueryContext() reports that EGL_RENDER_BUFFER equals EGL_BACK_BUFFER.
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This experiment suggests that the platform only supports double-buffer drawing.
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Consequently, FL_DOUBLE is enforced in all Fl_Gl_Window::mode_ values under Wayland.
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*/
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class Fl_Wayland_Gl_Window_Driver : public Fl_Gl_Window_Driver {
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friend Fl_Gl_Window_Driver* Fl_Gl_Window_Driver::newGlWindowDriver(Fl_Gl_Window *);
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friend class Fl_Wayland_Gl_Plugin;
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private:
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static EGLDisplay egl_display;
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struct wl_egl_window *egl_window;
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EGLSurface egl_surface;
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Fl_Wayland_Gl_Window_Driver(Fl_Gl_Window *win);
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float pixels_per_unit() FL_OVERRIDE;
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void make_current_before() FL_OVERRIDE;
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int mode_(int m, const int *a) FL_OVERRIDE;
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void swap_buffers() FL_OVERRIDE;
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void resize(int is_a_resize, int w, int h) FL_OVERRIDE;
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char swap_type() FL_OVERRIDE;
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void swap_interval(int) FL_OVERRIDE;
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int swap_interval() const FL_OVERRIDE;
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Fl_Gl_Choice *find(int m, const int *alistp) FL_OVERRIDE;
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GLContext create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g) FL_OVERRIDE;
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void set_gl_context(Fl_Window* w, GLContext context) FL_OVERRIDE;
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void delete_gl_context(GLContext) FL_OVERRIDE;
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void make_overlay_current() FL_OVERRIDE;
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void redraw_overlay() FL_OVERRIDE;
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void gl_start() FL_OVERRIDE;
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void gl_visual(Fl_Gl_Choice *c) FL_OVERRIDE;
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char *alpha_mask_for_string(
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const char *str, int n, int w, int h, Fl_Fontsize fs) FL_OVERRIDE;
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void init();
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public:
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//virtual bool need_scissor() { return true; } // CONTROL_LEAKING_SUB_GL_WINDOWS
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//void apply_scissor(); // CONTROL_LEAKING_SUB_GL_WINDOWS
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};
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#endif // HAVE_GL
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#endif // FL_WAYLAND_GL_WINDOW_DRIVER_H
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