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Add GlobalVertexBuffer for Sprites to share
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| /**************************************************************************** | ||
| Copyright (c) 2016 Chukong Technologies Inc. | ||
| http://www.cocos2d-x.org | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in | ||
| all copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| THE SOFTWARE. | ||
| ****************************************************************************/ | ||
|
|
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| var GlobalVertexBuffer = (function () { | ||
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| var VERTICES_SIZE = 888; | ||
|
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| var GlobalVertexBuffer = function (gl) { | ||
| // WebGL buffer | ||
| this.gl = gl; | ||
| this.vertexBuffer = gl.createBuffer(); | ||
|
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| this.size = VERTICES_SIZE; | ||
| this.byteLength = VERTICES_SIZE * 4 * cc.V3F_C4B_T2F_Quad.BYTES_PER_ELEMENT; | ||
|
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| // buffer data and views | ||
| this.data = new ArrayBuffer(this.byteLength); | ||
| this.dataArray = new Float32Array(this.data); | ||
|
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| // Init buffer data | ||
| gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer); | ||
| gl.bufferData(gl.ARRAY_BUFFER, this.byteLength, gl.DYNAMIC_DRAW); | ||
|
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| this._dirty = false; | ||
| this._spaces = { | ||
| 0: this.byteLength | ||
| }; | ||
| }; | ||
| GlobalVertexBuffer.prototype = { | ||
| constructor: GlobalVertexBuffer, | ||
|
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| allocBuffer: function (offset, size) { | ||
| var space = this._spaces[offset]; | ||
| if (space && space >= size) { | ||
| // Remove the space | ||
| delete this._spaces[offset]; | ||
| if (space > size) { | ||
| var newOffset = offset + size; | ||
| this._spaces[newOffset] = space - size; | ||
| } | ||
| return true; | ||
| } | ||
| else { | ||
| return false; | ||
| } | ||
| }, | ||
|
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| requestBuffer: function (size) { | ||
| var key, offset, available; | ||
| for (key in this._spaces) { | ||
| offset = parseInt(key); | ||
| available = this._spaces[key]; | ||
| if (available >= size && this.allocBuffer(offset, size)) { | ||
| return { | ||
| buffer: this, | ||
| offset: offset, | ||
| size: size | ||
| }; | ||
| } | ||
| } | ||
| return null; | ||
| }, | ||
|
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| freeBuffer: function (offset, size) { | ||
| var spaces = this._spaces; | ||
| var i, key, end; | ||
| // Merge with previous space | ||
| for (key in spaces) { | ||
| i = parseInt(key); | ||
| if (i > offset) { | ||
| break; | ||
| } | ||
| if (i + spaces[key] >= offset) { | ||
| size = size + offset - i; | ||
| offset = i; | ||
| break; | ||
| } | ||
| } | ||
|
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| end = offset + size; | ||
| // Merge with next space | ||
| if (this._spaces[end]) { | ||
| size += this._spaces[end]; | ||
| delete this._spaces[end]; | ||
| } | ||
|
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| this._spaces[offset] = size; | ||
| }, | ||
|
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| setDirty: function () { | ||
| this._dirty = true; | ||
| }, | ||
|
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| update: function () { | ||
| if (this._dirty) { | ||
| this.gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer); | ||
| // Note: Can memorize different dirty zones and update them separately, maybe faster | ||
| this.gl.bufferSubData(gl.ARRAY_BUFFER, 0, this.dataArray); | ||
| this._dirty = false; | ||
| } | ||
| }, | ||
|
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| destroy: function () { | ||
| this.gl.deleteBuffer(this.vertexBuffer); | ||
|
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| this.data = null; | ||
| this.positions = null; | ||
| this.colors = null; | ||
| this.texCoords = null; | ||
|
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| this.vertexBuffer = null; | ||
| } | ||
| }; | ||
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| return GlobalVertexBuffer; | ||
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| })(); |
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