81 lines
2.7 KiB
TypeScript
81 lines
2.7 KiB
TypeScript
import ScaleManager = Phaser.Scale.ScaleManager;
|
|
|
|
interface Size {
|
|
width: number;
|
|
height: number;
|
|
}
|
|
|
|
export class HdpiManager {
|
|
private _zoomModifier: number = 1;
|
|
|
|
public constructor(private minGamePixelsNumber: number) {
|
|
}
|
|
|
|
/**
|
|
* Returns the optimal size in "game pixels" based on the screen size in "real pixels".
|
|
*
|
|
* Note: the function is returning the optimal size in "game pixels" in the "game" property,
|
|
* but also recommends resizing the "real" pixel screen size of the canvas.
|
|
* The proposed new real size is a few pixels bigger than the real size available (if the size is not a multiple of the pixel size) and should overflow.
|
|
*
|
|
* @param realPixelScreenSize
|
|
*/
|
|
public getOptimalGameSize(realPixelScreenSize: Size): { game: Size, real: Size } {
|
|
const realPixelNumber = realPixelScreenSize.width * realPixelScreenSize.height;
|
|
// If the screen has not a definition small enough to match the minimum number of pixels we want to display,
|
|
// let's make the canvas the size of the screen (in real pixels)
|
|
if (realPixelNumber <= this.minGamePixelsNumber) {
|
|
return {
|
|
game: realPixelScreenSize,
|
|
real: realPixelScreenSize
|
|
};
|
|
}
|
|
|
|
let i = 1;
|
|
|
|
while (true) {
|
|
if (realPixelNumber <= this.minGamePixelsNumber * i * i) {
|
|
break;
|
|
}
|
|
|
|
i++;
|
|
}
|
|
|
|
// Has the canvas more pixels than the screen? This is forbidden
|
|
if ((i - 1) * this._zoomModifier < 1) {
|
|
// Let's reset the zoom modifier (WARNING this is a SIDE EFFECT in a getter)
|
|
this._zoomModifier = 1 / (i - 1);
|
|
|
|
return {
|
|
game: {
|
|
width: realPixelScreenSize.width,
|
|
height: realPixelScreenSize.height,
|
|
},
|
|
real: {
|
|
width: realPixelScreenSize.width,
|
|
height: realPixelScreenSize.height,
|
|
}
|
|
}
|
|
}
|
|
|
|
return {
|
|
game: {
|
|
width: Math.ceil(realPixelScreenSize.width / (i - 1) / this._zoomModifier),
|
|
height: Math.ceil(realPixelScreenSize.height / (i - 1) / this._zoomModifier),
|
|
},
|
|
real: {
|
|
width: Math.ceil(realPixelScreenSize.width / (i - 1)) * (i - 1),
|
|
height: Math.ceil(realPixelScreenSize.height / (i - 1)) * (i - 1),
|
|
}
|
|
}
|
|
}
|
|
|
|
public get zoomModifier(): number {
|
|
return this._zoomModifier;
|
|
}
|
|
|
|
public set zoomModifier(zoomModifier: number) {
|
|
this._zoomModifier = zoomModifier;
|
|
}
|
|
}
|