Java Game Development (14) - Comparing Display Modes

import java.awt.*;

import java.awt.image.BufferStrategy;

import java.awt.image.BufferedImage;

import java.lang.reflect.InvocationTargetException;

import javax.swing.JFrame;

public class ScreenManager {

private GraphicsDevice vc;

//訪問顯示器屏幕

public ScreenManager(){

GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();

vc = e.getDefaultScreenDevice();

}

//得到所有兼容

public DisplayMode[] getCompatibleDisplayMode(){ → Build-in Method

return vc.getDisplayModes();

}

//比較DisplayMode傳遞到vc，看它們是否匹配(boolean)

public DisplayMode findFirstCompatibleMode(DisplayMode modes[]){

DisplayMode goodModes[] = vc.getDisplayModes();

for(int x=0;x<modes.length;x++){ → 循環DisplayMode列陣

for(int y=0;y<goodModes.length;y++){ → 循環DisplayMode列陣

if(displayModesMatch(modes[x], goodModes[y])){

return modes[x];

}

}

}

return null;

}

//得到當前DisplayMode

public DisplayMode getCurrentDisplayMode(){

return vc.getDisplayMode();

}

//檢查兩種模式是否相互匹配

public boolean displayModesMatch(DisplayMode m1,DisplayMode m2){

if(m1.getWidth() != m2.getWidth() || m1.getHeight() != m2.getHeight()){

return false;

}

if(m1.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI && m2.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI && m1.getBitDepth() != m2.getBitDepth()) {

return false;

}

if(m1.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN && m2.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN && m1.getRefreshRate() != m2.getRefreshRate()) {

return false;

}

return true;

}

}