微信小程序-省心预览工具
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/******************************************************************************
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* Spine Runtimes License Agreement
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* Last updated April 5, 2025. Replaces all prior versions.
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*
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* Copyright (c) 2013-2025, Esoteric Software LLC
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*
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* Integration of the Spine Runtimes into software or otherwise creating
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* derivative works of the Spine Runtimes is permitted under the terms and
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* conditions of Section 2 of the Spine Editor License Agreement:
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* http://esotericsoftware.com/spine-editor-license
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*
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* Otherwise, it is permitted to integrate the Spine Runtimes into software
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* or otherwise create derivative works of the Spine Runtimes (collectively,
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* "Products"), provided that each user of the Products must obtain their own
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* Spine Editor license and redistribution of the Products in any form must
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* include this license and copyright notice.
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*
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* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
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* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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import { Mesh, Position2Attribute, ColorAttribute, TexCoordAttribute, Color2Attribute } from "./Mesh.js";
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import { ManagedWebGLRenderingContext } from "./WebGL.js";
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const GL_ONE = 1;
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const GL_ONE_MINUS_SRC_COLOR = 0x0301;
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const GL_SRC_ALPHA = 0x0302;
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const GL_ONE_MINUS_SRC_ALPHA = 0x0303;
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const GL_ONE_MINUS_DST_ALPHA = 0x0305;
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const GL_DST_COLOR = 0x0306;
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export class PolygonBatcher {
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static disableCulling = false;
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context;
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drawCalls = 0;
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static globalDrawCalls = 0;
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isDrawing = false;
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mesh;
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shader = null;
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lastTexture = null;
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verticesLength = 0;
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indicesLength = 0;
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srcColorBlend;
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srcAlphaBlend;
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dstBlend;
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cullWasEnabled = false;
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constructor(context, twoColorTint = true, maxVertices = 10920) {
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if (maxVertices > 10920)
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throw new Error("Can't have more than 10920 triangles per batch: " + maxVertices);
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this.context = context instanceof ManagedWebGLRenderingContext ? context : new ManagedWebGLRenderingContext(context);
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let attributes = twoColorTint ?
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[new Position2Attribute(), new ColorAttribute(), new TexCoordAttribute(), new Color2Attribute()] :
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[new Position2Attribute(), new ColorAttribute(), new TexCoordAttribute()];
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this.mesh = new Mesh(context, attributes, maxVertices, maxVertices * 3);
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let gl = this.context.gl;
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this.srcColorBlend = gl.SRC_ALPHA;
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this.srcAlphaBlend = gl.ONE;
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this.dstBlend = gl.ONE_MINUS_SRC_ALPHA;
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}
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begin(shader) {
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if (this.isDrawing)
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throw new Error("PolygonBatch is already drawing. Call PolygonBatch.end() before calling PolygonBatch.begin()");
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this.drawCalls = 0;
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this.shader = shader;
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this.lastTexture = null;
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this.isDrawing = true;
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let gl = this.context.gl;
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gl.enable(gl.BLEND);
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gl.blendFuncSeparate(this.srcColorBlend, this.dstBlend, this.srcAlphaBlend, this.dstBlend);
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if (PolygonBatcher.disableCulling) {
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this.cullWasEnabled = gl.isEnabled(gl.CULL_FACE);
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if (this.cullWasEnabled)
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gl.disable(gl.CULL_FACE);
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}
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}
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static blendModesGL = [
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{ srcRgb: GL_SRC_ALPHA, srcRgbPma: GL_ONE, dstRgb: GL_ONE_MINUS_SRC_ALPHA, srcAlpha: GL_ONE },
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{ srcRgb: GL_SRC_ALPHA, srcRgbPma: GL_ONE, dstRgb: GL_ONE, srcAlpha: GL_ONE },
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{ srcRgb: GL_DST_COLOR, srcRgbPma: GL_DST_COLOR, dstRgb: GL_ONE_MINUS_SRC_ALPHA, srcAlpha: GL_ONE },
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{ srcRgb: GL_ONE, srcRgbPma: GL_ONE, dstRgb: GL_ONE_MINUS_SRC_COLOR, srcAlpha: GL_ONE }
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];
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setBlendMode(blendMode, premultipliedAlpha) {
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const blendModeGL = PolygonBatcher.blendModesGL[blendMode];
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const srcColorBlend = premultipliedAlpha ? blendModeGL.srcRgbPma : blendModeGL.srcRgb;
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const srcAlphaBlend = blendModeGL.srcAlpha;
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const dstBlend = blendModeGL.dstRgb;
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if (this.srcColorBlend == srcColorBlend && this.srcAlphaBlend == srcAlphaBlend && this.dstBlend == dstBlend)
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return;
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this.srcColorBlend = srcColorBlend;
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this.srcAlphaBlend = srcAlphaBlend;
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this.dstBlend = dstBlend;
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if (this.isDrawing) {
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this.flush();
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}
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let gl = this.context.gl;
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gl.blendFuncSeparate(srcColorBlend, dstBlend, srcAlphaBlend, dstBlend);
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}
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draw(texture, vertices, indices) {
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if (texture != this.lastTexture) {
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this.flush();
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this.lastTexture = texture;
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}
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else if (this.verticesLength + vertices.length > this.mesh.getVertices().length ||
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this.indicesLength + indices.length > this.mesh.getIndices().length) {
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this.flush();
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}
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let indexStart = this.mesh.numVertices();
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this.mesh.getVertices().set(vertices, this.verticesLength);
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this.verticesLength += vertices.length;
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this.mesh.setVerticesLength(this.verticesLength);
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let indicesArray = this.mesh.getIndices();
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for (let i = this.indicesLength, j = 0; j < indices.length; i++, j++)
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indicesArray[i] = indices[j] + indexStart;
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this.indicesLength += indices.length;
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this.mesh.setIndicesLength(this.indicesLength);
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}
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flush() {
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if (this.verticesLength == 0)
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return;
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if (!this.lastTexture)
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throw new Error("No texture set.");
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if (!this.shader)
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throw new Error("No shader set.");
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this.lastTexture.bind();
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this.mesh.draw(this.shader, this.context.gl.TRIANGLES);
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this.verticesLength = 0;
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this.indicesLength = 0;
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this.mesh.setVerticesLength(0);
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this.mesh.setIndicesLength(0);
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this.drawCalls++;
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PolygonBatcher.globalDrawCalls++;
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}
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end() {
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if (!this.isDrawing)
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throw new Error("PolygonBatch is not drawing. Call PolygonBatch.begin() before calling PolygonBatch.end()");
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if (this.verticesLength > 0 || this.indicesLength > 0)
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this.flush();
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this.shader = null;
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this.lastTexture = null;
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this.isDrawing = false;
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let gl = this.context.gl;
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gl.disable(gl.BLEND);
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if (PolygonBatcher.disableCulling) {
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if (this.cullWasEnabled)
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gl.enable(gl.CULL_FACE);
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}
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}
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getDrawCalls() {
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return this.drawCalls;
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}
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static getAndResetGlobalDrawCalls() {
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let result = PolygonBatcher.globalDrawCalls;
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PolygonBatcher.globalDrawCalls = 0;
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return result;
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}
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dispose() {
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this.mesh.dispose();
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}
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}
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