@esotericsoftware/spine-canvaskit
Version:
The official Spine Runtimes for CanvasKit for NodeJS
271 lines • 41 kB
JavaScript
/******************************************************************************
* Spine Runtimes License Agreement
* Last updated July 28, 2023. Replaces all prior versions.
*
* Copyright (c) 2013-2023, Esoteric Software LLC
*
* Integration of the Spine Runtimes into software or otherwise creating
* derivative works of the Spine Runtimes is permitted under the terms and
* conditions of Section 2 of the Spine Editor License Agreement:
* http://esotericsoftware.com/spine-editor-license
*
* Otherwise, it is permitted to integrate the Spine Runtimes into software or
* otherwise create derivative works of the Spine Runtimes (collectively,
* "Products"), provided that each user of the Products must obtain their own
* Spine Editor license and redistribution of the Products in any form must
* include this license and copyright notice.
*
* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE
* SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
export * from "@esotericsoftware/spine-core";
import { AnimationState, AnimationStateData, AtlasAttachmentLoader, BlendMode, ClippingAttachment, MathUtils, MeshAttachment, Physics, RegionAttachment, Skeleton, SkeletonBinary, SkeletonClipping, SkeletonJson, Texture, TextureAtlas, Utils, } from "@esotericsoftware/spine-core";
Skeleton.yDown = true;
// CanvasKit blend modes for premultiplied alpha
function toCkBlendMode(ck, blendMode) {
switch (blendMode) {
case BlendMode.Normal:
return ck.BlendMode.SrcOver;
case BlendMode.Additive:
return ck.BlendMode.Plus;
case BlendMode.Multiply:
return ck.BlendMode.SrcOver;
case BlendMode.Screen:
return ck.BlendMode.Screen;
default:
return ck.BlendMode.SrcOver;
}
}
function bufferToUtf8String(buffer) {
if (typeof Buffer !== "undefined") {
return buffer.toString("utf-8");
}
else if (typeof TextDecoder !== "undefined") {
return new TextDecoder("utf-8").decode(buffer);
}
else {
throw new Error("Unsupported environment");
}
}
class CanvasKitTexture extends Texture {
getImage() {
return this._image;
}
setFilters() { }
setWraps() { }
dispose() {
const data = this._image;
for (const paint of data.paintPerBlendMode.values()) {
paint.delete();
}
for (const shader of data.shaders) {
shader.delete();
}
data.image.delete();
this._image = null;
}
static async fromFile(ck, path, readFile) {
const imgData = await readFile(path);
if (!imgData)
throw new Error(`Could not load image ${path}`);
const image = ck.MakeImageFromEncoded(imgData);
if (!image)
throw new Error(`Could not load image ${path}`);
const paintPerBlendMode = new Map();
const shaders = [];
for (const blendMode of [
BlendMode.Normal,
BlendMode.Additive,
BlendMode.Multiply,
BlendMode.Screen,
]) {
const paint = new ck.Paint();
const shader = image.makeShaderOptions(ck.TileMode.Clamp, ck.TileMode.Clamp, ck.FilterMode.Linear, ck.MipmapMode.Linear);
paint.setShader(shader);
paint.setBlendMode(toCkBlendMode(ck, blendMode));
paintPerBlendMode.set(blendMode, paint);
shaders.push(shader);
}
return new CanvasKitTexture({ shaders, paintPerBlendMode, image });
}
}
/**
* Loads a {@link TextureAtlas} and its atlas page images from the given file path using the `readFile(path: string): Promise<Buffer>` function.
* Throws an `Error` if the file or one of the atlas page images could not be loaded.
*/
export async function loadTextureAtlas(ck, atlasFile, readFile) {
const atlas = new TextureAtlas(bufferToUtf8String(await readFile(atlasFile)));
const slashIndex = atlasFile.lastIndexOf("/");
const parentDir = slashIndex >= 0 ? atlasFile.substring(0, slashIndex + 1) : "";
for (const page of atlas.pages) {
const texture = await CanvasKitTexture.fromFile(ck, parentDir + page.name, readFile);
page.setTexture(texture);
}
return atlas;
}
/**
* Loads a {@link SkeletonData} from the given file path (`.json` or `.skel`) using the `readFile(path: string): Promise<Buffer>` function.
* Attachments will be looked up in the provided atlas.
*/
export async function loadSkeletonData(skeletonFile, atlas, readFile, scale = 1) {
const attachmentLoader = new AtlasAttachmentLoader(atlas);
const loader = skeletonFile.endsWith(".json")
? new SkeletonJson(attachmentLoader)
: new SkeletonBinary(attachmentLoader);
loader.scale = scale;
const data = await readFile(skeletonFile);
if (loader instanceof SkeletonJson) {
return loader.readSkeletonData(bufferToUtf8String(data));
}
return loader.readSkeletonData(data);
}
/**
* Manages a {@link Skeleton} and its associated {@link AnimationState}. A drawable is constructed from a {@link SkeletonData}, which can
* be shared by any number of drawables.
*/
export class SkeletonDrawable {
skeleton;
animationState;
/**
* Constructs a new drawble from the skeleton data.
*/
constructor(skeletonData) {
this.skeleton = new Skeleton(skeletonData);
this.animationState = new AnimationState(new AnimationStateData(skeletonData));
}
/**
* Updates the animation state and skeleton time by the delta time. Applies the
* animations to the skeleton and calculates the final pose of the skeleton.
*
* @param deltaTime the time since the last update in seconds
* @param physicsUpdate optional {@link Physics} update mode.
*/
update(deltaTime, physicsUpdate = Physics.update) {
this.animationState.update(deltaTime);
this.skeleton.update(deltaTime);
this.animationState.apply(this.skeleton);
this.skeleton.updateWorldTransform(physicsUpdate);
}
}
/**
* Renders a {@link Skeleton} or {@link SkeletonDrawable} to a CanvasKit {@link Canvas}.
*/
export class SkeletonRenderer {
ck;
clipper = new SkeletonClipping();
static QUAD_TRIANGLES = [0, 1, 2, 2, 3, 0];
scratchPositions = Utils.newFloatArray(100);
scratchUVs = Utils.newFloatArray(100);
scratchColors = new Uint32Array(100 / 4);
/**
* Creates a new skeleton renderer.
* @param ck the {@link CanvasKit} instance returned by `CanvasKitInit()`.
*/
constructor(ck) {
this.ck = ck;
}
/**
* Renders a skeleton or skeleton drawable in its current pose to the canvas.
* @param canvas the canvas to render to.
* @param skeleton the skeleton or drawable to render.
*/
render(canvas, skeleton) {
if (skeleton instanceof SkeletonDrawable)
skeleton = skeleton.skeleton;
const clipper = this.clipper;
const drawOrder = skeleton.drawOrder;
const skeletonColor = skeleton.color;
for (let i = 0, n = drawOrder.length; i < n; i++) {
const slot = drawOrder[i];
if (!slot.bone.active) {
clipper.clipEndWithSlot(slot);
continue;
}
const attachment = slot.getAttachment();
let positions = this.scratchPositions;
let triangles;
let numVertices = 4;
if (attachment instanceof RegionAttachment) {
attachment.computeWorldVertices(slot, positions, 0, 2);
triangles = SkeletonRenderer.QUAD_TRIANGLES;
}
else if (attachment instanceof MeshAttachment) {
if (positions.length < attachment.worldVerticesLength) {
this.scratchPositions = Utils.newFloatArray(attachment.worldVerticesLength);
positions = this.scratchPositions;
}
numVertices = attachment.worldVerticesLength >> 1;
attachment.computeWorldVertices(slot, 0, attachment.worldVerticesLength, positions, 0, 2);
triangles = attachment.triangles;
}
else if (attachment instanceof ClippingAttachment) {
clipper.clipStart(slot, attachment);
continue;
}
else {
clipper.clipEndWithSlot(slot);
continue;
}
const texture = attachment.region?.texture;
if (texture) {
let uvs = attachment.uvs;
let scaledUvs;
let colors = this.scratchColors;
if (clipper.isClipping()) {
clipper.clipTrianglesUnpacked(positions, triangles, triangles.length, uvs);
if (clipper.clippedVertices.length <= 0) {
clipper.clipEndWithSlot(slot);
continue;
}
positions = clipper.clippedVertices;
uvs = scaledUvs = clipper.clippedUVs;
triangles = clipper.clippedTriangles;
numVertices = clipper.clippedVertices.length / 2;
colors = new Uint32Array(numVertices);
}
else {
scaledUvs = this.scratchUVs;
if (this.scratchUVs.length < uvs.length)
scaledUvs = this.scratchUVs = Utils.newFloatArray(uvs.length);
if (colors.length < numVertices)
colors = this.scratchColors = new Uint32Array(numVertices);
}
const ckImage = texture.getImage();
const image = ckImage.image;
const width = image.width();
const height = image.height();
for (let i = 0; i < uvs.length; i += 2) {
scaledUvs[i] = uvs[i] * width;
scaledUvs[i + 1] = uvs[i + 1] * height;
}
const attachmentColor = attachment.color;
const slotColor = slot.color;
// using Uint32Array for colors allows to avoid canvaskit to allocate one each time
// but colors need to be in canvaskit format.
// See: https://github.com/google/skia/blob/bb8c36fdf7b915a8c096e35e2f08109e477fe1b8/modules/canvaskit/color.js#L163
const finalColor = (MathUtils.clamp(skeletonColor.a * slotColor.a * attachmentColor.a * 255, 0, 255) << 24 |
MathUtils.clamp(skeletonColor.r * slotColor.r * attachmentColor.r * 255, 0, 255) << 16 |
MathUtils.clamp(skeletonColor.g * slotColor.g * attachmentColor.g * 255, 0, 255) << 8 |
MathUtils.clamp(skeletonColor.b * slotColor.b * attachmentColor.b * 255, 0, 255) << 0) >>> 0;
for (let i = 0, n = numVertices; i < n; i++)
colors[i] = finalColor;
const vertices = this.ck.MakeVertices(this.ck.VertexMode.Triangles, positions, scaledUvs, colors, triangles, false);
const ckPaint = ckImage.paintPerBlendMode.get(slot.data.blendMode);
if (ckPaint)
canvas.drawVertices(vertices, this.ck.BlendMode.Modulate, ckPaint);
vertices.delete();
}
clipper.clipEndWithSlot(slot);
}
clipper.clipEnd();
}
}
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* Spine Runtimes License Agreement\n * Last updated July 28, 2023. Replaces all prior versions.\n *\n * Copyright (c) 2013-2023, Esoteric Software LLC\n *\n * Integration of the Spine Runtimes into software or otherwise creating\n * derivative works of the Spine Runtimes is permitted under the terms and\n * conditions of Section 2 of the Spine Editor License Agreement:\n * http://esotericsoftware.com/spine-editor-license\n *\n * Otherwise, it is permitted to integrate the Spine Runtimes into software or\n * otherwise create derivative works of the Spine Runtimes (collectively,\n * \"Products\"), provided that each user of the Products must obtain their own\n * Spine Editor license and redistribution of the Products in any form must\n * include this license and copyright notice.\n *\n * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC \"AS IS\" AND ANY\n * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY\n * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,\n * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND\n * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE\n * SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n *****************************************************************************/\n\nexport * from \"@esotericsoftware/spine-core\";\n\nimport {\n\tAnimationState,\n\tAnimationStateData,\n\tAtlasAttachmentLoader,\n\tBlendMode,\n\tClippingAttachment,\n\ttype Color,\n\tMathUtils,\n\tMeshAttachment,\n\ttype NumberArrayLike,\n\tPhysics,\n\tRegionAttachment,\n\tSkeleton,\n\tSkeletonBinary,\n\tSkeletonClipping,\n\ttype SkeletonData,\n\tSkeletonJson,\n\tTexture,\n\tTextureAtlas,\n\tUtils,\n} from \"@esotericsoftware/spine-core\";\n\nimport type { Canvas, CanvasKit, Image, Paint, Shader } from \"canvaskit-wasm\";\n\nSkeleton.yDown = true;\n\ntype CanvasKitImage = {\n\tshaders: Shader[];\n\tpaintPerBlendMode: Map<BlendMode, Paint>;\n\timage: Image;\n};\n\n// CanvasKit blend modes for premultiplied alpha\nfunction toCkBlendMode (ck: CanvasKit, blendMode: BlendMode) {\n\tswitch (blendMode) {\n\t\tcase BlendMode.Normal:\n\t\t\treturn ck.BlendMode.SrcOver;\n\t\tcase BlendMode.Additive:\n\t\t\treturn ck.BlendMode.Plus;\n\t\tcase BlendMode.Multiply:\n\t\t\treturn ck.BlendMode.SrcOver;\n\t\tcase BlendMode.Screen:\n\t\t\treturn ck.BlendMode.Screen;\n\t\tdefault:\n\t\t\treturn ck.BlendMode.SrcOver;\n\t}\n}\n\nfunction bufferToUtf8String (buffer: ArrayBuffer | Buffer) {\n\tif (typeof Buffer !== \"undefined\") {\n\t\treturn buffer.toString(\"utf-8\");\n\t} else if (typeof TextDecoder !== \"undefined\") {\n\t\treturn new TextDecoder(\"utf-8\").decode(buffer);\n\t} else {\n\t\tthrow new Error(\"Unsupported environment\");\n\t}\n}\n\nclass CanvasKitTexture extends Texture {\n\tgetImage (): CanvasKitImage {\n\t\treturn this._image;\n\t}\n\n\tsetFilters (): void { }\n\n\tsetWraps (): void { }\n\n\tdispose (): void {\n\t\tconst data: CanvasKitImage = this._image;\n\t\tfor (const paint of data.paintPerBlendMode.values()) {\n\t\t\tpaint.delete();\n\t\t}\n\t\tfor (const shader of data.shaders) {\n\t\t\tshader.delete();\n\t\t}\n\t\tdata.image.delete();\n\t\tthis._image = null;\n\t}\n\n\tstatic async fromFile (\n\t\tck: CanvasKit,\n\t\tpath: string,\n\t\treadFile: (path: string) => Promise<ArrayBuffer | Buffer>\n\t): Promise<CanvasKitTexture> {\n\t\tconst imgData = await readFile(path);\n\t\tif (!imgData) throw new Error(`Could not load image ${path}`);\n\t\tconst image = ck.MakeImageFromEncoded(imgData);\n\t\tif (!image) throw new Error(`Could not load image ${path}`);\n\t\tconst paintPerBlendMode = new Map<BlendMode, Paint>();\n\t\tconst shaders: Shader[] = [];\n\t\tfor (const blendMode of [\n\t\t\tBlendMode.Normal,\n\t\t\tBlendMode.Additive,\n\t\t\tBlendMode.Multiply,\n\t\t\tBlendMode.Screen,\n\t\t]) {\n\t\t\tconst paint = new ck.Paint();\n\t\t\tconst shader = image.makeShaderOptions(\n\t\t\t\tck.TileMode.Clamp,\n\t\t\t\tck.TileMode.Clamp,\n\t\t\t\tck.FilterMode.Linear,\n\t\t\t\tck.MipmapMode.Linear\n\t\t\t);\n\t\t\tpaint.setShader(shader);\n\t\t\tpaint.setBlendMode(toCkBlendMode(ck, blendMode));\n\t\t\tpaintPerBlendMode.set(blendMode, paint);\n\t\t\tshaders.push(shader);\n\t\t}\n\t\treturn new CanvasKitTexture({ shaders, paintPerBlendMode, image });\n\t}\n}\n\n/**\n * Loads a {@link TextureAtlas} and its atlas page images from the given file path using the `readFile(path: string): Promise<Buffer>` function.\n * Throws an `Error` if the file or one of the atlas page images could not be loaded.\n */\nexport async function loadTextureAtlas (\n\tck: CanvasKit,\n\tatlasFile: string,\n\treadFile: (path: string) => Promise<ArrayBuffer | Buffer>\n): Promise<TextureAtlas> {\n\tconst atlas = new TextureAtlas(bufferToUtf8String(await readFile(atlasFile)));\n\tconst slashIndex = atlasFile.lastIndexOf(\"/\");\n\tconst parentDir =\n\t\tslashIndex >= 0 ? atlasFile.substring(0, slashIndex + 1) : \"\";\n\tfor (const page of atlas.pages) {\n\t\tconst texture = await CanvasKitTexture.fromFile(\n\t\t\tck,\n\t\t\tparentDir + page.name,\n\t\t\treadFile\n\t\t);\n\t\tpage.setTexture(texture);\n\t}\n\treturn atlas;\n}\n\n/**\n * Loads a {@link SkeletonData} from the given file path (`.json` or `.skel`) using the `readFile(path: string): Promise<Buffer>` function.\n * Attachments will be looked up in the provided atlas.\n */\nexport async function loadSkeletonData (\n\tskeletonFile: string,\n\tatlas: TextureAtlas,\n\treadFile: (path: string) => Promise<ArrayBuffer | Buffer>,\n\tscale = 1\n): Promise<SkeletonData> {\n\tconst attachmentLoader = new AtlasAttachmentLoader(atlas);\n\tconst loader = skeletonFile.endsWith(\".json\")\n\t\t? new SkeletonJson(attachmentLoader)\n\t\t: new SkeletonBinary(attachmentLoader);\n\tloader.scale = scale;\n\tconst data = await readFile(skeletonFile);\n\tif (loader instanceof SkeletonJson) {\n\t\treturn loader.readSkeletonData(bufferToUtf8String(data))\n\t}\n\treturn loader.readSkeletonData(data);\n}\n\n/**\n * Manages a {@link Skeleton} and its associated {@link AnimationState}. A drawable is constructed from a {@link SkeletonData}, which can\n * be shared by any number of drawables.\n */\nexport class SkeletonDrawable {\n\tpublic readonly skeleton: Skeleton;\n\tpublic readonly animationState: AnimationState;\n\n    /**\n     * Constructs a new drawble from the skeleton data.\n     */\n\tconstructor (skeletonData: SkeletonData) {\n\t\tthis.skeleton = new Skeleton(skeletonData);\n\t\tthis.animationState = new AnimationState(\n\t\t\tnew AnimationStateData(skeletonData)\n\t\t);\n\t}\n\n    /**\n     * Updates the animation state and skeleton time by the delta time. Applies the\n     * animations to the skeleton and calculates the final pose of the skeleton.\n     *\n     * @param deltaTime the time since the last update in seconds\n     * @param physicsUpdate optional {@link Physics} update mode.\n     */\n\tupdate (deltaTime: number, physicsUpdate: Physics = Physics.update) {\n\t\tthis.animationState.update(deltaTime);\n\t\tthis.skeleton.update(deltaTime);\n\t\tthis.animationState.apply(this.skeleton);\n\t\tthis.skeleton.updateWorldTransform(physicsUpdate);\n\t}\n}\n\n/**\n * Renders a {@link Skeleton} or {@link SkeletonDrawable} to a CanvasKit {@link Canvas}.\n */\nexport class SkeletonRenderer {\n\tprivate clipper = new SkeletonClipping();\n\tprivate static QUAD_TRIANGLES = [0, 1, 2, 2, 3, 0];\n\tprivate scratchPositions = Utils.newFloatArray(100);\n\tprivate scratchUVs = Utils.newFloatArray(100);\n\tprivate scratchColors = new Uint32Array(100 / 4);\n\n    /**\n     * Creates a new skeleton renderer.\n     * @param ck the {@link CanvasKit} instance returned by `CanvasKitInit()`.\n     */\n\tconstructor (private ck: CanvasKit) { }\n\n    /**\n     * Renders a skeleton or skeleton drawable in its current pose to the canvas.\n     * @param canvas the canvas to render to.\n     * @param skeleton the skeleton or drawable to render.\n     */\n\trender (canvas: Canvas, skeleton: Skeleton | SkeletonDrawable) {\n\t\tif (skeleton instanceof SkeletonDrawable) skeleton = skeleton.skeleton;\n\t\tconst clipper = this.clipper;\n\t\tconst drawOrder = skeleton.drawOrder;\n\t\tconst skeletonColor = skeleton.color;\n\n\t\tfor (let i = 0, n = drawOrder.length; i < n; i++) {\n\t\t\tconst slot = drawOrder[i];\n\t\t\tif (!slot.bone.active) {\n\t\t\t\tclipper.clipEndWithSlot(slot);\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst attachment = slot.getAttachment();\n\t\t\tlet positions = this.scratchPositions;\n\t\t\tlet triangles: Array<number>;\n\t\t\tlet numVertices = 4;\n\n\t\t\tif (attachment instanceof RegionAttachment) {\n\t\t\t\tattachment.computeWorldVertices(slot, positions, 0, 2);\n\t\t\t\ttriangles = SkeletonRenderer.QUAD_TRIANGLES;\n\t\t\t} else if (attachment instanceof MeshAttachment) {\n\t\t\t\tif (positions.length < attachment.worldVerticesLength) {\n\t\t\t\t\tthis.scratchPositions = Utils.newFloatArray(attachment.worldVerticesLength);\n\t\t\t\t\tpositions = this.scratchPositions;\n\t\t\t\t}\n\t\t\t\tnumVertices = attachment.worldVerticesLength >> 1;\n\t\t\t\tattachment.computeWorldVertices(\n\t\t\t\t\tslot,\n\t\t\t\t\t0,\n\t\t\t\t\tattachment.worldVerticesLength,\n\t\t\t\t\tpositions,\n\t\t\t\t\t0,\n\t\t\t\t\t2\n\t\t\t\t);\n\t\t\t\ttriangles = attachment.triangles;\n\t\t\t} else if (attachment instanceof ClippingAttachment) {\n\t\t\t\tclipper.clipStart(slot, attachment);\n\t\t\t\tcontinue;\n\t\t\t} else {\n\t\t\t\tclipper.clipEndWithSlot(slot);\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst texture = attachment.region?.texture as CanvasKitTexture;\n\t\t\tif (texture) {\n\t\t\t\tlet uvs = attachment.uvs;\n\t\t\t\tlet scaledUvs: NumberArrayLike;\n\t\t\t\tlet colors = this.scratchColors;\n\t\t\t\tif (clipper.isClipping()) {\n\t\t\t\t\tclipper.clipTrianglesUnpacked(positions, triangles, triangles.length, uvs);\n\t\t\t\t\tif (clipper.clippedVertices.length <= 0) {\n\t\t\t\t\t\tclipper.clipEndWithSlot(slot);\n\t\t\t\t\t\tcontinue;\n\t\t\t\t\t}\n\t\t\t\t\tpositions = clipper.clippedVertices;\n\t\t\t\t\tuvs = scaledUvs = clipper.clippedUVs;\n\t\t\t\t\ttriangles = clipper.clippedTriangles;\n\t\t\t\t\tnumVertices = clipper.clippedVertices.length / 2;\n\t\t\t\t\tcolors = new Uint32Array(numVertices);\n\t\t\t\t} else {\n\t\t\t\t\tscaledUvs = this.scratchUVs;\n\t\t\t\t\tif (this.scratchUVs.length < uvs.length)\n\t\t\t\t\t\tscaledUvs = this.scratchUVs = Utils.newFloatArray(uvs.length);\n\t\t\t\t\tif (colors.length < numVertices)\n\t\t\t\t\t\tcolors = this.scratchColors = new Uint32Array(numVertices);\n\t\t\t\t}\n\n\t\t\t\tconst ckImage = texture.getImage();\n\t\t\t\tconst image = ckImage.image;\n\t\t\t\tconst width = image.width();\n\t\t\t\tconst height = image.height();\n\t\t\t\tfor (let i = 0; i < uvs.length; i += 2) {\n\t\t\t\t\tscaledUvs[i] = uvs[i] * width;\n\t\t\t\t\tscaledUvs[i + 1] = uvs[i + 1] * height;\n\t\t\t\t}\n\n\t\t\t\tconst attachmentColor = attachment.color;\n\t\t\t\tconst slotColor = slot.color;\n\n\t\t\t\t// using Uint32Array for colors allows to avoid canvaskit to allocate one each time\n\t\t\t\t// but colors need to be in canvaskit format.\n\t\t\t\t// See: https://github.com/google/skia/blob/bb8c36fdf7b915a8c096e35e2f08109e477fe1b8/modules/canvaskit/color.js#L163\n\t\t\t\tconst finalColor = (\n\t\t\t\t\tMathUtils.clamp(skeletonColor.a * slotColor.a * attachmentColor.a * 255, 0, 255) << 24 |\n\t\t\t\t\tMathUtils.clamp(skeletonColor.r * slotColor.r * attachmentColor.r * 255, 0, 255) << 16 |\n\t\t\t\t\tMathUtils.clamp(skeletonColor.g * slotColor.g * attachmentColor.g * 255, 0, 255) << 8 |\n\t\t\t\t\tMathUtils.clamp(skeletonColor.b * slotColor.b * attachmentColor.b * 255, 0, 255) << 0\n\t\t\t\t) >>> 0;\n\t\t\t\tfor (let i = 0, n = numVertices; i < n; i++) colors[i] = finalColor;\n\n\t\t\t\tconst vertices = this.ck.MakeVertices(\n\t\t\t\t\tthis.ck.VertexMode.Triangles,\n\t\t\t\t\tpositions,\n\t\t\t\t\tscaledUvs,\n\t\t\t\t\tcolors,\n\t\t\t\t\ttriangles,\n\t\t\t\t\tfalse\n\t\t\t\t);\n\t\t\t\tconst ckPaint = ckImage.paintPerBlendMode.get(slot.data.blendMode);\n\t\t\t\tif (ckPaint) canvas.drawVertices(vertices, this.ck.BlendMode.Modulate, ckPaint);\n\t\t\t\tvertices.delete();\n\t\t\t}\n\n\t\t\tclipper.clipEndWithSlot(slot);\n\t\t}\n\t\tclipper.clipEnd();\n\t}\n}\n"]}