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Support Animated Cape Sprites #15

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Support Animated Cape Sprites #15

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b08e331
Support HD Capes
james090500 Jan 5, 2023
3a4d150
Fix spacing
james090500 Jan 5, 2023
fd2c17d
Request changes
james090500 Jan 10, 2023
5ed1e74
Fix missing load to canvas frame
james090500 Jan 11, 2023
d13b97d
Revert change
james090500 Jan 11, 2023
48fa9eb
Fix small capes not rendering
james090500 Jan 11, 2023
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22 changes: 20 additions & 2 deletions src/process.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -164,19 +164,37 @@ function computeCapeScale(image: TextureSource): number {
} else if (image.width * 11 === image.height * 23) {
// 46x22
return image.width / 46;
} else if ((image.height % (image.width / 2)) == 0) {
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// Supports animated capes sprite
// (height / (width/2) == total frames
// Total frames must be a whole number
return image.width / 64
} else {
throw new Error(`Bad cape size: ${image.width}x${image.height}`);
}
}

export function loadCapeToCanvas(canvas: TextureCanvas, image: TextureSource): void {
export function loadCapeToCanvas(canvas: TextureCanvas, image: TextureSource, frame?: number): void {
const scale = computeCapeScale(image);
canvas.width = 64 * scale;
canvas.height = 32 * scale;

//Default a cape has a single frame unless animated
frame = frame != undefined ? frame : 1;

const frameWidth = image.width;
let frameHeight = image.height;
let frameOffset = 0

//This checks if a cape is a sprite
if(frameHeight >= frameWidth) {
frameHeight = frameWidth / 2;
frameOffset = frameHeight * (frame - 1);
}

const context = canvas.getContext("2d")!;
context.clearRect(0, 0, canvas.width, canvas.height);
context.drawImage(image, 0, 0, image.width, image.height);
context.drawImage(image, 0, frameOffset, frameWidth, frameHeight, 0, 0, frameWidth, frameHeight)
}

function isAreaBlack(context: CanvasImageData, x0: number, y0: number, w: number, h: number): boolean {
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