@esotericsoftware/spine-webgl
Version:
The official Spine Runtimes for the web.
163 lines • 24.3 kB
JavaScript
/******************************************************************************
* Spine Runtimes License Agreement
* Last updated April 5, 2025. Replaces all prior versions.
*
* Copyright (c) 2013-2025, 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.
*****************************************************************************/
import { Color2Attribute, ColorAttribute, Mesh, Position2Attribute, TexCoordAttribute } from "./Mesh.js";
import { ManagedWebGLRenderingContext } from "./WebGL.js";
const GL_ONE = 1;
const GL_ONE_MINUS_SRC_COLOR = 0x0301;
const GL_ONE_MINUS_SRC_ALPHA = 0x0303;
const GL_DST_COLOR = 0x0306;
export class PolygonBatcher {
static disableCulling = false;
context;
drawCalls = 0;
static globalDrawCalls = 0;
isDrawing = false;
mesh;
shader = null;
lastTexture = null;
verticesLength = 0;
indicesLength = 0;
srcColorBlend;
srcAlphaBlend;
dstBlend;
cullWasEnabled = false;
constructor(context, twoColorTint = true, maxVertices = 10920) {
if (maxVertices > 10920)
throw new Error(`Can't have more than 10920 triangles per batch: ${maxVertices}`);
this.context = context instanceof ManagedWebGLRenderingContext ? context : new ManagedWebGLRenderingContext(context);
const attributes = twoColorTint ?
[new Position2Attribute(), new ColorAttribute(), new TexCoordAttribute(), new Color2Attribute()] :
[new Position2Attribute(), new ColorAttribute(), new TexCoordAttribute()];
this.mesh = new Mesh(context, attributes, maxVertices, maxVertices * 3);
const gl = this.context.gl;
this.srcColorBlend = gl.SRC_ALPHA;
this.srcAlphaBlend = gl.ONE;
this.dstBlend = gl.ONE_MINUS_SRC_ALPHA;
}
begin(shader) {
if (this.isDrawing)
throw new Error("PolygonBatch is already drawing. Call PolygonBatch.end() before calling PolygonBatch.begin()");
this.drawCalls = 0;
this.shader = shader;
this.lastTexture = null;
this.isDrawing = true;
const gl = this.context.gl;
gl.enable(gl.BLEND);
gl.blendFuncSeparate(this.srcColorBlend, this.dstBlend, this.srcAlphaBlend, this.dstBlend);
if (PolygonBatcher.disableCulling) {
this.cullWasEnabled = gl.isEnabled(gl.CULL_FACE);
if (this.cullWasEnabled)
gl.disable(gl.CULL_FACE);
}
}
static blendModesGL = [
{ srcRgbPma: GL_ONE, dstRgb: GL_ONE_MINUS_SRC_ALPHA, srcAlpha: GL_ONE },
{ srcRgbPma: GL_ONE, dstRgb: GL_ONE, srcAlpha: GL_ONE },
{ srcRgbPma: GL_DST_COLOR, dstRgb: GL_ONE_MINUS_SRC_ALPHA, srcAlpha: GL_ONE },
{ srcRgbPma: GL_ONE, dstRgb: GL_ONE_MINUS_SRC_COLOR, srcAlpha: GL_ONE }
];
setBlendMode(blendMode) {
const blendModeGL = PolygonBatcher.blendModesGL[blendMode];
const srcColorBlend = blendModeGL.srcRgbPma;
const srcAlphaBlend = blendModeGL.srcAlpha;
const dstBlend = blendModeGL.dstRgb;
if (this.srcColorBlend === srcColorBlend && this.srcAlphaBlend === srcAlphaBlend && this.dstBlend === dstBlend)
return;
this.srcColorBlend = srcColorBlend;
this.srcAlphaBlend = srcAlphaBlend;
this.dstBlend = dstBlend;
if (this.isDrawing) {
this.flush();
}
const gl = this.context.gl;
gl.blendFuncSeparate(srcColorBlend, dstBlend, srcAlphaBlend, dstBlend);
}
draw(texture, vertices, indices) {
if (texture !== this.lastTexture) {
this.flush();
this.lastTexture = texture;
}
else if (this.verticesLength + vertices.length > this.mesh.getVertices().length ||
this.indicesLength + indices.length > this.mesh.getIndices().length) {
this.flush();
}
const indexStart = this.mesh.numVertices();
this.mesh.getVertices().set(vertices, this.verticesLength);
this.verticesLength += vertices.length;
this.mesh.setVerticesLength(this.verticesLength);
const indicesArray = this.mesh.getIndices();
for (let i = this.indicesLength, j = 0; j < indices.length; i++, j++)
indicesArray[i] = indices[j] + indexStart;
this.indicesLength += indices.length;
this.mesh.setIndicesLength(this.indicesLength);
}
flush() {
if (this.verticesLength === 0)
return;
if (!this.lastTexture)
throw new Error("No texture set.");
if (!this.shader)
throw new Error("No shader set.");
this.lastTexture.bind();
this.mesh.draw(this.shader, this.context.gl.TRIANGLES);
this.verticesLength = 0;
this.indicesLength = 0;
this.mesh.setVerticesLength(0);
this.mesh.setIndicesLength(0);
this.drawCalls++;
PolygonBatcher.globalDrawCalls++;
}
end() {
if (!this.isDrawing)
throw new Error("PolygonBatch is not drawing. Call PolygonBatch.begin() before calling PolygonBatch.end()");
if (this.verticesLength > 0 || this.indicesLength > 0)
this.flush();
this.shader = null;
this.lastTexture = null;
this.isDrawing = false;
const gl = this.context.gl;
gl.disable(gl.BLEND);
if (PolygonBatcher.disableCulling) {
if (this.cullWasEnabled)
gl.enable(gl.CULL_FACE);
}
}
getDrawCalls() {
return this.drawCalls;
}
static getAndResetGlobalDrawCalls() {
const result = PolygonBatcher.globalDrawCalls;
PolygonBatcher.globalDrawCalls = 0;
return result;
}
dispose() {
this.mesh.dispose();
}
}
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* Spine Runtimes License Agreement\n * Last updated April 5, 2025. Replaces all prior versions.\n *\n * Copyright (c) 2013-2025, 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\n * or 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\n * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n *****************************************************************************/\n\nimport type { BlendMode, Disposable } from \"@esotericsoftware/spine-core\";\nimport type { GLTexture } from \"./GLTexture.js\";\nimport { Color2Attribute, ColorAttribute, Mesh, Position2Attribute, TexCoordAttribute } from \"./Mesh.js\";\nimport type { Shader } from \"./Shader.js\";\nimport { ManagedWebGLRenderingContext } from \"./WebGL.js\";\n\nconst GL_ONE = 1;\nconst GL_ONE_MINUS_SRC_COLOR = 0x0301;\nconst GL_ONE_MINUS_SRC_ALPHA = 0x0303;\nconst GL_DST_COLOR = 0x0306;\n\nexport class PolygonBatcher implements Disposable {\n\tpublic static disableCulling = false;\n\n\tprivate context: ManagedWebGLRenderingContext;\n\tprivate drawCalls = 0;\n\tprivate static globalDrawCalls = 0;\n\tisDrawing = false;\n\tprivate mesh: Mesh;\n\tprivate shader: Shader | null = null;\n\tprivate lastTexture: GLTexture | null = null;\n\tprivate verticesLength = 0;\n\tprivate indicesLength = 0;\n\tprivate srcColorBlend: number;\n\tprivate srcAlphaBlend: number;\n\tprivate dstBlend: number;\n\tprivate cullWasEnabled = false;\n\n\tconstructor (context: ManagedWebGLRenderingContext | WebGLRenderingContext, twoColorTint: boolean = true, maxVertices: number = 10920) {\n\t\tif (maxVertices > 10920) throw new Error(`Can't have more than 10920 triangles per batch: ${maxVertices}`);\n\t\tthis.context = context instanceof ManagedWebGLRenderingContext ? context : new ManagedWebGLRenderingContext(context);\n\t\tconst attributes = twoColorTint ?\n\t\t\t[new Position2Attribute(), new ColorAttribute(), new TexCoordAttribute(), new Color2Attribute()] :\n\t\t\t[new Position2Attribute(), new ColorAttribute(), new TexCoordAttribute()];\n\t\tthis.mesh = new Mesh(context, attributes, maxVertices, maxVertices * 3);\n\t\tconst gl = this.context.gl;\n\t\tthis.srcColorBlend = gl.SRC_ALPHA;\n\t\tthis.srcAlphaBlend = gl.ONE;\n\t\tthis.dstBlend = gl.ONE_MINUS_SRC_ALPHA;\n\t}\n\n\tbegin (shader: Shader) {\n\t\tif (this.isDrawing) throw new Error(\"PolygonBatch is already drawing. Call PolygonBatch.end() before calling PolygonBatch.begin()\");\n\t\tthis.drawCalls = 0;\n\t\tthis.shader = shader;\n\t\tthis.lastTexture = null;\n\t\tthis.isDrawing = true;\n\n\t\tconst gl = this.context.gl;\n\t\tgl.enable(gl.BLEND);\n\t\tgl.blendFuncSeparate(this.srcColorBlend, this.dstBlend, this.srcAlphaBlend, this.dstBlend);\n\n\t\tif (PolygonBatcher.disableCulling) {\n\t\t\tthis.cullWasEnabled = gl.isEnabled(gl.CULL_FACE);\n\t\t\tif (this.cullWasEnabled) gl.disable(gl.CULL_FACE);\n\t\t}\n\t}\n\n\tprivate static blendModesGL: { srcRgbPma: number, dstRgb: number, srcAlpha: number }[] = [\n\t\t{ srcRgbPma: GL_ONE, dstRgb: GL_ONE_MINUS_SRC_ALPHA, srcAlpha: GL_ONE },\n\t\t{ srcRgbPma: GL_ONE, dstRgb: GL_ONE, srcAlpha: GL_ONE },\n\t\t{ srcRgbPma: GL_DST_COLOR, dstRgb: GL_ONE_MINUS_SRC_ALPHA, srcAlpha: GL_ONE },\n\t\t{ srcRgbPma: GL_ONE, dstRgb: GL_ONE_MINUS_SRC_COLOR, srcAlpha: GL_ONE }\n\t]\n\n\tsetBlendMode (blendMode: BlendMode) {\n\t\tconst blendModeGL = PolygonBatcher.blendModesGL[blendMode];\n\t\tconst srcColorBlend = blendModeGL.srcRgbPma;\n\t\tconst srcAlphaBlend = blendModeGL.srcAlpha;\n\t\tconst dstBlend = blendModeGL.dstRgb;\n\n\t\tif (this.srcColorBlend === srcColorBlend && this.srcAlphaBlend === srcAlphaBlend && this.dstBlend === dstBlend) return;\n\t\tthis.srcColorBlend = srcColorBlend;\n\t\tthis.srcAlphaBlend = srcAlphaBlend;\n\t\tthis.dstBlend = dstBlend;\n\t\tif (this.isDrawing) {\n\t\t\tthis.flush();\n\t\t}\n\t\tconst gl = this.context.gl;\n\t\tgl.blendFuncSeparate(srcColorBlend, dstBlend, srcAlphaBlend, dstBlend);\n\t}\n\n\tdraw (texture: GLTexture, vertices: ArrayLike<number>, indices: Array<number>) {\n\t\tif (texture !== this.lastTexture) {\n\t\t\tthis.flush();\n\t\t\tthis.lastTexture = texture;\n\t\t} else if (this.verticesLength + vertices.length > this.mesh.getVertices().length ||\n\t\t\tthis.indicesLength + indices.length > this.mesh.getIndices().length) {\n\t\t\tthis.flush();\n\t\t}\n\n\t\tconst indexStart = this.mesh.numVertices();\n\t\tthis.mesh.getVertices().set(vertices, this.verticesLength);\n\t\tthis.verticesLength += vertices.length;\n\t\tthis.mesh.setVerticesLength(this.verticesLength)\n\n\t\tconst indicesArray = this.mesh.getIndices();\n\t\tfor (let i = this.indicesLength, j = 0; j < indices.length; i++, j++)\n\t\t\tindicesArray[i] = indices[j] + indexStart;\n\t\tthis.indicesLength += indices.length;\n\t\tthis.mesh.setIndicesLength(this.indicesLength);\n\t}\n\n\tflush () {\n\t\tif (this.verticesLength === 0) return;\n\t\tif (!this.lastTexture) throw new Error(\"No texture set.\");\n\t\tif (!this.shader) throw new Error(\"No shader set.\");\n\t\tthis.lastTexture.bind();\n\t\tthis.mesh.draw(this.shader, this.context.gl.TRIANGLES);\n\n\t\tthis.verticesLength = 0;\n\t\tthis.indicesLength = 0;\n\t\tthis.mesh.setVerticesLength(0);\n\t\tthis.mesh.setIndicesLength(0);\n\t\tthis.drawCalls++;\n\t\tPolygonBatcher.globalDrawCalls++;\n\t}\n\n\tend () {\n\t\tif (!this.isDrawing) throw new Error(\"PolygonBatch is not drawing. Call PolygonBatch.begin() before calling PolygonBatch.end()\");\n\t\tif (this.verticesLength > 0 || this.indicesLength > 0) this.flush();\n\t\tthis.shader = null;\n\t\tthis.lastTexture = null;\n\t\tthis.isDrawing = false;\n\n\t\tconst gl = this.context.gl;\n\t\tgl.disable(gl.BLEND);\n\t\tif (PolygonBatcher.disableCulling) {\n\t\t\tif (this.cullWasEnabled) gl.enable(gl.CULL_FACE);\n\t\t}\n\t}\n\n\tgetDrawCalls () {\n\t\treturn this.drawCalls;\n\t}\n\n\tstatic getAndResetGlobalDrawCalls () {\n\t\tconst result = PolygonBatcher.globalDrawCalls;\n\t\tPolygonBatcher.globalDrawCalls = 0;\n\t\treturn result;\n\t}\n\n\tdispose () {\n\t\tthis.mesh.dispose();\n\t}\n}\n"]}