minetest/src/clientdynamicinfo.cpp

/*
Minetest
Copyright (C) 2022-3 rubenwardy <rw@rubenwardy.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "clientdynamicinfo.h"

#if CHECK_CLIENT_BUILD()

#include "settings.h"
#include "client/renderingengine.h"
#include "gui/guiFormSpecMenu.h"
#include "gui/touchcontrols.h"

ClientDynamicInfo ClientDynamicInfo::getCurrent()
{
    v2u32 screen_size = RenderingEngine::getWindowSize();
    f32 density = RenderingEngine::getDisplayDensity();
    f32 gui_scaling = g_settings->getFloat("gui_scaling", 0.5f, 20.0f);
    f32 hud_scaling = g_settings->getFloat("hud_scaling", 0.5f, 20.0f);
    f32 real_gui_scaling = gui_scaling * density;
    f32 real_hud_scaling = hud_scaling * density;
    bool touch_controls = g_touchcontrols;

    return {
        screen_size, real_gui_scaling, real_hud_scaling,
        ClientDynamicInfo::calculateMaxFSSize(screen_size, density, gui_scaling),
        touch_controls
    };
}

v2f32 ClientDynamicInfo::calculateMaxFSSize(v2u32 render_target_size, f32 density, f32 gui_scaling)
{
	// must stay in sync with GUIFormSpecMenu::calculateImgsize

    const double screen_dpi = density * 96;

    // assume padding[0,0] since max_formspec_size is used for fullscreen formspecs
	double prefer_imgsize = GUIFormSpecMenu::getImgsize(render_target_size,
            screen_dpi, gui_scaling);
    return v2f32(render_target_size.X / prefer_imgsize,
            render_target_size.Y / prefer_imgsize);
}

#endif