cocos-enhance-kit/engine/extensions/dragonbones/webgl-assembler.js

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 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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import Assembler from '../../cocos2d/core/renderer/assembler';
import Mat4 from '../../cocos2d/core/value-types/mat4';

const Armature = require('./ArmatureDisplay');
const RenderFlow = require('../../cocos2d/core/renderer/render-flow');
const gfx = cc.gfx;
const NEED_COLOR = 0x01;
const NEED_BATCH = 0x10;

let _boneColor = cc.color(255, 0, 0, 255);
let _slotColor = cc.color(0, 0, 255, 255);
let _originColor = cc.color(0, 255, 0, 255);

let _nodeR, _nodeG, _nodeB, _nodeA,
    _premultipliedAlpha, _multiply,
    _mustFlush, _buffer, _node,
    _renderer, _comp,
    _vfOffset, _indexOffset, _vertexOffset,
    _vertexCount, _indexCount,
    _x, _y, _c, _r, _g, _b, _a, _handleVal,
    _m00, _m04, _m12,
    _m01, _m05, _m13;

function _getSlotMaterial (tex, blendMode) {
    if(!tex)return null;

    let src, dst;
    switch (blendMode) {
        case 1://additive
            src = _premultipliedAlpha ? cc.macro.ONE : cc.macro.SRC_ALPHA;
            dst = cc.macro.ONE;
            break;
        case 10://multiply
            src = cc.macro.DST_COLOR;
            dst = cc.macro.ONE_MINUS_SRC_ALPHA;
            break;
        case 12://screen
            src = cc.macro.ONE;
            dst = cc.macro.ONE_MINUS_SRC_COLOR;
            break;
        case 0://normal
        default:
            src = _premultipliedAlpha ? cc.macro.ONE : cc.macro.SRC_ALPHA;
            dst = cc.macro.ONE_MINUS_SRC_ALPHA;
            break;
    }

    let useModel = !_comp.enableBatch;
    let baseMaterial = _comp._materials[0];
    if (!baseMaterial) {
        return null;
    }
    let materialCache = _comp._materialCache;

    // The key use to find corresponding material
    let key = tex.getId() + src + dst + useModel;
    let material = materialCache[key];
    if (!material) {
        if (!materialCache.baseMaterial) {
            material = baseMaterial;
            materialCache.baseMaterial = baseMaterial;
        } else {
            material = cc.MaterialVariant.create(baseMaterial);
        }

        material.define('CC_USE_MODEL', useModel);
        material.setProperty('texture', tex);

        // update blend function
        material.setBlend(
            true,
            gfx.BLEND_FUNC_ADD,
            src, dst,
            gfx.BLEND_FUNC_ADD,
            src, dst
        );
        materialCache[key] = material;
    }
    return material;
}

function _handleColor (color, parentOpacity) {
    _a = color.a * parentOpacity * _nodeA;
    _multiply = _premultipliedAlpha? _a / 255.0 : 1.0;
    _r = color.r * _nodeR * _multiply;
    _g = color.g * _nodeG * _multiply;
    _b = color.b * _nodeB * _multiply;
    _c = ((_a<<24) >>> 0) + (_b<<16) + (_g<<8) + _r;
}

export default class ArmatureAssembler extends Assembler {
    updateRenderData (comp, batchData) {}

    realTimeTraverse (armature, parentMat, parentOpacity) {
        let slots = armature._slots;
        let vbuf, ibuf, uintbuf;
        let material;
        let vertices, indices;
        let slotColor;
        let slot;
        let slotMat;
        let slotMatm;
        let offsetInfo;

        for (let i = 0, l = slots.length; i < l; i++) {
            slot = slots[i];
            slotColor = slot._color;

            if (!slot._visible || !slot._displayData) continue;

            if (parentMat) {
                slot._mulMat(slot._worldMatrix, parentMat, slot._matrix);
            } else {
                Mat4.copy(slot._worldMatrix, slot._matrix);
            }

            if (slot.childArmature) {
                this.realTimeTraverse(slot.childArmature, slot._worldMatrix, parentOpacity * slotColor.a / 255);
                continue;
            }

            material = _getSlotMaterial(slot.getTexture(), slot._blendMode);
            if (!material) {
                continue;
            }

            if (_mustFlush || material.getHash() !== _renderer.material.getHash()) {
                _mustFlush = false;
                _renderer._flush();
                _renderer.node = _node;
                _renderer.material = material;
            }

            _handleColor(slotColor, parentOpacity);
            slotMat = slot._worldMatrix;
            slotMatm = slotMat.m;

            vertices = slot._localVertices;
            _vertexCount = vertices.length >> 2;

            indices = slot._indices;
            _indexCount = indices.length;
            
            offsetInfo = _buffer.request(_vertexCount, _indexCount);
            _indexOffset = offsetInfo.indiceOffset;
            _vfOffset = offsetInfo.byteOffset >> 2;
            _vertexOffset = offsetInfo.vertexOffset;
            vbuf = _buffer._vData;
            ibuf = _buffer._iData;
            uintbuf = _buffer._uintVData;

            _m00 = slotMatm[0];
            _m04 = slotMatm[4];
            _m12 = slotMatm[12];
            _m01 = slotMatm[1];
            _m05 = slotMatm[5];
            _m13 = slotMatm[13];

            for (let vi = 0, vl = vertices.length; vi < vl;) {
                _x = vertices[vi++]; 
                _y = vertices[vi++];

                vbuf[_vfOffset++] = _x * _m00 + _y * _m04 + _m12; // x
                vbuf[_vfOffset++] = _x * _m01 + _y * _m05 + _m13; // y

                vbuf[_vfOffset++] = vertices[vi++]; // u
                vbuf[_vfOffset++] = vertices[vi++]; // v
                uintbuf[_vfOffset++] = _c; // color
            }

            for (let ii = 0, il = indices.length; ii < il; ii ++) {
                ibuf[_indexOffset++] = _vertexOffset + indices[ii];
            }
        }
    }

    cacheTraverse (frame, parentMat) {
        if (!frame) return;
        let segments = frame.segments;
        if (segments.length == 0) return;

        let vbuf, ibuf, uintbuf;
        let material;
        let offsetInfo;
        let vertices = frame.vertices;
        let indices = frame.indices;
        
        let frameVFOffset = 0, frameIndexOffset = 0, segVFCount = 0;
        if (parentMat) {
            let parentMatm = parentMat.m;
            _m00 = parentMatm[0];
            _m01 = parentMatm[1];
            _m04 = parentMatm[4];
            _m05 = parentMatm[5];
            _m12 = parentMatm[12];
            _m13 = parentMatm[13];
        }

        let justTranslate = _m00 === 1 && _m01 === 0 && _m04 === 0 && _m05 === 1;
        let needBatch = (_handleVal & NEED_BATCH);
        let calcTranslate = needBatch && justTranslate;

        let colorOffset = 0;
        let colors = frame.colors;
        let nowColor = colors[colorOffset++];
        let maxVFOffset = nowColor.vfOffset;
        _handleColor(nowColor, 1.0);

        for (let i = 0, n = segments.length; i < n; i++) {
            let segInfo = segments[i];
            material = _getSlotMaterial(segInfo.tex, segInfo.blendMode);
            if (_mustFlush || material.getHash() !== _renderer.material.getHash()) {
                _mustFlush = false;
                _renderer._flush();
                _renderer.node = _node;
                _renderer.material = material;
            }

            _vertexCount = segInfo.vertexCount;
            _indexCount = segInfo.indexCount;
            
            offsetInfo = _buffer.request(_vertexCount, _indexCount);
            _indexOffset = offsetInfo.indiceOffset;
            _vertexOffset = offsetInfo.vertexOffset;
            _vfOffset = offsetInfo.byteOffset >> 2;
            vbuf = _buffer._vData;
            ibuf = _buffer._iData;
            uintbuf = _buffer._uintVData;

            for (let ii = _indexOffset, il = _indexOffset + _indexCount; ii < il; ii++) {
                ibuf[ii] = _vertexOffset + indices[frameIndexOffset++];
            }

            segVFCount = segInfo.vfCount;
            vbuf.set(vertices.subarray(frameVFOffset, frameVFOffset + segVFCount), _vfOffset);
            frameVFOffset += segVFCount;

            if (calcTranslate) {
                for (let ii = _vfOffset, il = _vfOffset + segVFCount; ii < il; ii += 5) {
                    vbuf[ii] += _m12;
                    vbuf[ii + 1] += _m13;
                }
            } else if (needBatch) {
                for (let ii = _vfOffset, il = _vfOffset + segVFCount; ii < il; ii += 5) {
                    _x = vbuf[ii];
                    _y = vbuf[ii + 1];
                    vbuf[ii] = _x * _m00 + _y * _m04 + _m12;
                    vbuf[ii + 1] = _x * _m01 + _y * _m05 + _m13;
                }
            }

            if ( !(_handleVal & NEED_COLOR) ) continue;

            // handle color
            let frameColorOffset = frameVFOffset - segVFCount;
            for (let ii = _vfOffset + 4, il = _vfOffset + 4 + segVFCount; ii < il; ii += 5, frameColorOffset += 5) {
                if (frameColorOffset >= maxVFOffset) {
                    nowColor = colors[colorOffset++];
                    _handleColor(nowColor, 1.0);
                    maxVFOffset = nowColor.vfOffset;
                }
                uintbuf[ii] = _c;
            }
        }
    }

    fillBuffers (comp, renderer) {
        comp.node._renderFlag |= RenderFlow.FLAG_UPDATE_RENDER_DATA;
        
        let armature = comp._armature;
        if (!armature) return;

        // Init temp var.
        _mustFlush = true;
        _premultipliedAlpha = comp.premultipliedAlpha;
        _node = comp.node;
        _buffer = renderer._meshBuffer;
        _renderer = renderer;
        _comp = comp;
        _handleVal = 0;

        let nodeColor = _node._color;
        _nodeR = nodeColor.r / 255;
        _nodeG = nodeColor.g / 255;
        _nodeB = nodeColor.b / 255;
        _nodeA = nodeColor.a / 255;
        if (nodeColor._val !== 0xffffffff) {
            _handleVal |= NEED_COLOR;
        }

        let worldMat = undefined;
        if (_comp.enableBatch) {
            worldMat = _node._worldMatrix;
            _mustFlush = false;
            _handleVal |= NEED_BATCH;
        }

        if (comp.isAnimationCached()) {
            // Traverse input assembler.
            this.cacheTraverse(comp._curFrame, worldMat);
        } else {
            // Traverse all armature.
            this.realTimeTraverse(armature, worldMat, 1.0);

            let graphics = comp._debugDraw;
            if (comp.debugBones && graphics) {
                graphics.clear();

                graphics.lineWidth = 5;
                graphics.strokeColor = _boneColor;
                graphics.fillColor = _slotColor; // Root bone color is same as slot color.

                let bones = armature.getBones();
                for (let i = 0, l = bones.length; i < l; i++) {
                    let bone =  bones[i];
                    let boneLength = Math.max(bone.boneData.length, 5);
                    let startX = bone.globalTransformMatrix.tx;
                    let startY = bone.globalTransformMatrix.ty;
                    let endX = startX + bone.globalTransformMatrix.a * boneLength;
                    let endY = startY + bone.globalTransformMatrix.b * boneLength;

                    graphics.moveTo(startX, startY);
                    graphics.lineTo(endX, endY);
                    graphics.stroke();

                    // Bone origins.
                    graphics.circle(startX, startY, Math.PI * 2);
                    graphics.fill();
                    if (i === 0) {
                        graphics.fillColor = _originColor;
                    }
                }
            }
        }
        
        // sync attached node matrix
        renderer.worldMatDirty++;
        comp.attachUtil._syncAttachedNode();

        // Clear temp var.
        _node = undefined;
        _buffer = undefined;
        _renderer = undefined;
        _comp = undefined;
    }

    postFillBuffers (comp, renderer) {
        renderer.worldMatDirty--;
    }
}

Assembler.register(Armature, ArmatureAssembler);