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use @yushijinhun/skinview-utils

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yushijinhun 2020-01-11 21:26:58 +08:00
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5 changed files with 9 additions and 194 deletions
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6
package-lock.json generated
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@ -352,6 +352,12 @@
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"dev": true
},
"@yushijinhun/skinview-utils": {
"version": "0.1.0",
"resolved": "https://registry.npmjs.org/@yushijinhun/skinview-utils/-/skinview-utils-0.1.0.tgz",
"integrity": "sha512-2dnV0DLW4DKCZikz93+6nWxVEuwUgJ6sdBfhPkoOT9T1aSJ9Yc1jsMwljBQskrOzjBM38PBuVdBXgg6EVzYNkQ==",
"dev": true
},
"JSONStream": {
"version": "1.3.4",
"resolved": "https://registry.npmjs.org/JSONStream/-/JSONStream-1.3.4.tgz",

1
package.json
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@ -39,6 +39,7 @@
"@rollup/plugin-node-resolve": "^6.0.0",
"@types/chai": "^4.1.4",
"@types/mocha": "^5.2.5",
"@yushijinhun/skinview-utils": "^0.1.0",
"chai": "^4.2.0",
"karma": "^3.0.0",
"karma-chrome-launcher": "^2.2.0",

2
src/skinview3d.ts
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@ -33,4 +33,4 @@ export {
export {
isSlimSkin
} from "./utils";
} from "@yushijinhun/skinview-utils";

192
src/utils.ts
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@ -1,192 +0,0 @@
function copyImage(context: CanvasRenderingContext2D, sX: number, sY: number, w: number, h: number, dX: number, dY: number, flipHorizontal: boolean) {
const imgData = context.getImageData(sX, sY, w, h);
if (flipHorizontal) {
for (let y = 0; y < h; y++) {
for (let x = 0; x < (w / 2); x++) {
const index = (x + y * w) * 4;
const index2 = ((w - x - 1) + y * w) * 4;
const pA1 = imgData.data[index];
const pA2 = imgData.data[index + 1];
const pA3 = imgData.data[index + 2];
const pA4 = imgData.data[index + 3];
const pB1 = imgData.data[index2];
const pB2 = imgData.data[index2 + 1];
const pB3 = imgData.data[index2 + 2];
const pB4 = imgData.data[index2 + 3];
imgData.data[index] = pB1;
imgData.data[index + 1] = pB2;
imgData.data[index + 2] = pB3;
imgData.data[index + 3] = pB4;
imgData.data[index2] = pA1;
imgData.data[index2 + 1] = pA2;
imgData.data[index2 + 2] = pA3;
imgData.data[index2 + 3] = pA4;
}
}
}
context.putImageData(imgData, dX, dY);
}
function hasTransparency(context: CanvasRenderingContext2D, x0: number, y0: number, w: number, h: number) {
const imgData = context.getImageData(x0, y0, w, h);
for (let x = 0; x < w; x++) {
for (let y = 0; y < h; y++) {
const offset = (x + y * w) * 4;
if (imgData.data[offset + 3] !== 0xff) {
return true;
}
}
}
return false;
}
function computeSkinScale(width: number) {
return width / 64.0;
}
function fixOpaqueSkin(context: CanvasRenderingContext2D, width: number) {
// Some ancient skins don't have transparent pixels (nor have helm).
// We have to make the helm area transparent, otherwise it will be rendered as black.
if (!hasTransparency(context, 0, 0, width, width / 2)) {
const scale = computeSkinScale(width);
const clearArea = (x, y, w, h) => context.clearRect(x * scale, y * scale, w * scale, h * scale);
clearArea(40, 0, 8, 8); // Helm Top
clearArea(48, 0, 8, 8); // Helm Bottom
clearArea(32, 8, 8, 8); // Helm Right
clearArea(40, 8, 8, 8); // Helm Front
clearArea(48, 8, 8, 8); // Helm Left
clearArea(56, 8, 8, 8); // Helm Back
}
}
function convertSkinTo1_8(context: CanvasRenderingContext2D, width: number) {
const scale = computeSkinScale(width);
const copySkin = (sX, sY, w, h, dX, dY, flipHorizontal) => copyImage(context, sX * scale, sY * scale, w * scale, h * scale, dX * scale, dY * scale, flipHorizontal);
fixOpaqueSkin(context, width);
copySkin(4, 16, 4, 4, 20, 48, true); // Top Leg
copySkin(8, 16, 4, 4, 24, 48, true); // Bottom Leg
copySkin(0, 20, 4, 12, 24, 52, true); // Outer Leg
copySkin(4, 20, 4, 12, 20, 52, true); // Front Leg
copySkin(8, 20, 4, 12, 16, 52, true); // Inner Leg
copySkin(12, 20, 4, 12, 28, 52, true); // Back Leg
copySkin(44, 16, 4, 4, 36, 48, true); // Top Arm
copySkin(48, 16, 4, 4, 40, 48, true); // Bottom Arm
copySkin(40, 20, 4, 12, 40, 52, true); // Outer Arm
copySkin(44, 20, 4, 12, 36, 52, true); // Front Arm
copySkin(48, 20, 4, 12, 32, 52, true); // Inner Arm
copySkin(52, 20, 4, 12, 44, 52, true); // Back Arm
}
export function loadSkinToCanvas(canvas: HTMLCanvasElement, image: HTMLImageElement) {
let isOldFormat = false;
if (image.width !== image.height) {
if (image.width === 2 * image.height) {
isOldFormat = true;
} else {
throw new Error(`Bad skin size: ${image.width}x${image.height}`);
}
}
const context = canvas.getContext("2d")!;
if (isOldFormat) {
const sideLength = image.width;
canvas.width = sideLength;
canvas.height = sideLength;
context.clearRect(0, 0, sideLength, sideLength);
context.drawImage(image, 0, 0, sideLength, sideLength / 2.0);
convertSkinTo1_8(context, sideLength);
} else {
canvas.width = image.width;
canvas.height = image.height;
context.clearRect(0, 0, image.width, image.height);
context.drawImage(image, 0, 0, canvas.width, canvas.height);
}
}
export function loadCapeToCanvas(canvas: HTMLCanvasElement, image: HTMLImageElement) {
let isOldFormat = false;
if (image.width !== 2 * image.height) {
if (image.width * 17 === image.height * 22) {
// width/height = 22/17
isOldFormat = true;
} else {
throw new Error(`Bad cape size: ${image.width}x${image.height}`);
}
}
const context = canvas.getContext("2d")!;
if (isOldFormat) {
const width = image.width * 64 / 22;
canvas.width = width;
canvas.height = width / 2;
} else {
canvas.width = image.width;
canvas.height = image.height;
}
context.clearRect(0, 0, canvas.width, canvas.height);
context.drawImage(image, 0, 0, image.width, image.height);
}
export function isSlimSkin(canvasOrImage: HTMLCanvasElement | HTMLImageElement): boolean {
// Detects whether the skin is default or slim.
//
// The right arm area of *default* skins:
// (44,16)->*-------*-------*
// (40,20) |top |bottom |
// \|/ |4x4 |4x4 |
// *-------*-------*-------*-------*
// |right |front |left |back |
// |4x12 |4x12 |4x12 |4x12 |
// *-------*-------*-------*-------*
// The right arm area of *slim* skins:
// (44,16)->*------*------*-*
// (40,20) |top |bottom| |<----[x0=50,y0=16,w=2,h=4]
// \|/ |3x4 |3x4 | |
// *-------*------*------***-----*-*
// |right |front |left |back | |<----[x0=54,y0=20,w=2,h=12]
// |4x12 |3x12 |4x12 |3x12 | |
// *-------*------*-------*------*-*
// Compared with default right arms, slim right arms have 2 unused areas.
//
// The same is true for left arm:
// The left arm area of *default* skins:
// (36,48)->*-------*-------*
// (32,52) |top |bottom |
// \|/ |4x4 |4x4 |
// *-------*-------*-------*-------*
// |right |front |left |back |
// |4x12 |4x12 |4x12 |4x12 |
// *-------*-------*-------*-------*
// The left arm area of *slim* skins:
// (36,48)->*------*------*-*
// (32,52) |top |bottom| |<----[x0=42,y0=48,w=2,h=4]
// \|/ |3x4 |3x4 | |
// *-------*------*------***-----*-*
// |right |front |left |back | |<----[x0=46,y0=52,w=2,h=12]
// |4x12 |3x12 |4x12 |3x12 | |
// *-------*------*-------*------*-*
//
// If there is a transparent pixel in any of the 4 unused areas, the skin must be slim,
// as transparent pixels are not allowed in the first layer.
if (canvasOrImage instanceof HTMLCanvasElement) {
const canvas = canvasOrImage;
const scale = computeSkinScale(canvas.width);
const context = canvas.getContext("2d")!;
const checkArea = (x, y, w, h) => hasTransparency(context, x * scale, y * scale, w * scale, h * scale);
return checkArea(50, 16, 2, 4) ||
checkArea(54, 20, 2, 12) ||
checkArea(42, 48, 2, 4) ||
checkArea(46, 52, 2, 12);
} else {
const image = canvasOrImage;
const canvas = document.createElement("canvas");
loadSkinToCanvas(canvas, image);
return isSlimSkin(canvas);
}
}

2
src/viewer.ts
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@ -1,7 +1,7 @@
import { DoubleSide, FrontSide, MeshBasicMaterial, NearestFilter, PerspectiveCamera, Scene, Texture, Vector2, WebGLRenderer } from "three";
import { RootAnimation } from "./animation";
import { PlayerObject } from "./model";
import { isSlimSkin, loadCapeToCanvas, loadSkinToCanvas } from "./utils";
import { isSlimSkin, loadCapeToCanvas, loadSkinToCanvas } from "@yushijinhun/skinview-utils";
export interface SkinViewerOptions {
domElement: Node;