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/* Screen.cpp
Copyright (c) 2014 by Michael Zahniser
Endless Sky 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 3 of the License, or (at your option) any later version.
Endless Sky 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
this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "Screen.h"
#include <algorithm>
using namespace std;
namespace {
int RAW_WIDTH = 0;
int RAW_HEIGHT = 0;
int WIDTH = 0;
int HEIGHT = 0;
int USER_ZOOM = 100;
int EFFECTIVE_ZOOM = 100;
bool HIGH_DPI = false;
}
Screen::ScreenDimensionsGuard::ScreenDimensionsGuard(int width, int height)
: valid(true), oldWidth(WIDTH), oldHeight(HEIGHT)
{
WIDTH = width;
HEIGHT = height;
}
Screen::ScreenDimensionsGuard::~ScreenDimensionsGuard()
{
Deactivate();
}
void Screen::ScreenDimensionsGuard::Deactivate()
{
if(!valid)
return;
WIDTH = oldWidth;
HEIGHT = oldHeight;
valid = false;
}
void Screen::SetRaw(int width, int height)
{
RAW_WIDTH = width;
RAW_HEIGHT = height;
SetZoom(USER_ZOOM);
}
int Screen::UserZoom()
{
return USER_ZOOM;
}
int Screen::Zoom()
{
return EFFECTIVE_ZOOM;
}
void Screen::SetZoom(int percent)
{
USER_ZOOM = max(100, min(200, percent));
// Make sure the zoom factor is not set too high for the full UI to fit.
static const int MIN_WIDTH = 1000; // Width of main menu
static const int MIN_HEIGHT = 500; // Height of preferences panel
int minZoomX = 100 * RAW_WIDTH / MIN_WIDTH;
int minZoomY = 100 * RAW_HEIGHT / MIN_HEIGHT;
int minZoom = min(minZoomX, minZoomY);
// Never go below 100% zoom, no matter how small the window is
minZoom = max(minZoom, 100);
// Use increments of 10, like the user setting
minZoom -= minZoom % 10;
EFFECTIVE_ZOOM = min(minZoom, UserZoom());
WIDTH = RAW_WIDTH * 100 / EFFECTIVE_ZOOM;
HEIGHT = RAW_HEIGHT * 100 / EFFECTIVE_ZOOM;
}
// Specify that this is a high-DPI window.
void Screen::SetHighDPI(bool isHighDPI)
{
HIGH_DPI = isHighDPI;
}
// This is true if the screen is high DPI, or if the zoom is above 100%.
bool Screen::IsHighResolution()
{
return HIGH_DPI || (EFFECTIVE_ZOOM > 100);
}
Point Screen::Dimensions()
{
return Point(WIDTH, HEIGHT);
}
int Screen::Width()
{
return WIDTH;
}
int Screen::Height()
{
return HEIGHT;
}
int Screen::RawWidth()
{
return RAW_WIDTH;
}
int Screen::RawHeight()
{
return RAW_HEIGHT;
}
int Screen::Left()
{
return WIDTH / -2;
}
int Screen::Top()
{
return HEIGHT / -2;
}
int Screen::Right()
{
return WIDTH / 2;
}
int Screen::Bottom()
{
return HEIGHT / 2;
}
Point Screen::TopLeft()
{
return Point(-.5 * WIDTH, -.5 * HEIGHT);
}
Point Screen::TopRight()
{
return Point(.5 * WIDTH, -.5 * HEIGHT);
}
Point Screen::BottomLeft()
{
return Point(-.5 * WIDTH, .5 * HEIGHT);
}
Point Screen::BottomRight()
{
return Point(.5 * WIDTH, .5 * HEIGHT);
}
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