51 lines
1.3 KiB
Haxe
51 lines
1.3 KiB
Haxe
package kha.graphics4;
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import js.html.webgl.GL;
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import kha.arrays.Uint32Array;
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import kha.graphics4.Usage;
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class IndexBuffer {
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public var _data: Uint32Array;
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var buffer: Dynamic;
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var mySize: Int;
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var usage: Usage;
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var lockStart: Int = 0;
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var lockEnd: Int = 0;
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public function new(indexCount: Int, usage: Usage, canRead: Bool = false) {
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this.usage = usage;
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mySize = indexCount;
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buffer = SystemImpl.gl.createBuffer();
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_data = new Uint32Array(indexCount);
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}
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public function delete(): Void {
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_data = null;
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SystemImpl.gl.deleteBuffer(buffer);
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}
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public function lock(?start: Int, ?count: Int): Uint32Array {
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lockStart = start != null ? start : 0;
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lockEnd = count != null ? start + count : mySize;
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return _data.subarray(lockStart, lockEnd);
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}
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public function unlock(?count: Int): Void {
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if (count != null)
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lockEnd = lockStart + count;
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SystemImpl.gl.bindBuffer(GL.ELEMENT_ARRAY_BUFFER, buffer);
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var data = _data.subarray(lockStart, lockEnd);
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var glData: Dynamic = SystemImpl.elementIndexUint == null ? new js.lib.Uint16Array(data.buffer) : data;
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SystemImpl.gl.bufferData(GL.ELEMENT_ARRAY_BUFFER, glData, usage == Usage.DynamicUsage ? GL.DYNAMIC_DRAW : GL.STATIC_DRAW);
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}
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public function set(): Void {
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SystemImpl.gl.bindBuffer(GL.ELEMENT_ARRAY_BUFFER, buffer);
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}
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public function count(): Int {
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return mySize;
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}
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}
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