Update Files

Kha/Backends/Krom/kha/graphics4/VertexBuffer.hx

@@ -0,0 +1,61 @@
+package kha.graphics4;
+
+import kha.arrays.Float32Array;
+import kha.arrays.Int16Array;
+import kha.graphics4.Usage;
+import kha.graphics4.VertexStructure;
+import kha.graphics4.VertexData;
+
+class VertexBuffer {
+	public var buffer: Dynamic;
+	public var _data: Float32Array;
+
+	var vertexCount: Int;
+	var structure: VertexStructure;
+	var mySize: Int;
+	var lockStart: Int = 0;
+	var lockEnd: Int = 0;
+
+	public function new(vertexCount: Int, structure: VertexStructure, usage: Usage, instanceDataStepRate: Int = 0, canRead: Bool = false) {
+		this.vertexCount = vertexCount;
+		this.structure = structure;
+		mySize = vertexCount;
+		buffer = Krom.createVertexBuffer(vertexCount, structure.elements, usage, instanceDataStepRate);
+	}
+
+	public function delete() {
+		Krom.deleteVertexBuffer(buffer);
+		buffer = null;
+	}
+
+	public function lock(?start: Int, ?count: Int): Float32Array {
+		lockStart = start != null ? start : 0;
+		lockEnd = count != null ? start + count : mySize;
+		_data = new kha.arrays.ByteArray(Krom.lockVertexBuffer(buffer, lockStart, lockEnd));
+		return _data;
+	}
+
+	public function lockInt16(?start: Int, ?count: Int): Int16Array {
+		return new Int16Array(untyped lock(start, count).buffer);
+	}
+
+	public function unlock(?count: Int): Void {
+		if (count != null) {
+			lockEnd = lockStart + count;
+		}
+		Krom.unlockVertexBuffer(buffer, lockEnd);
+	}
+
+	public function stride(): Int {
+		return structure.byteSize();
+	}
+
+	public function count(): Int {
+		return vertexCount;
+	}
+
+	public function set(offset: Int): Int {
+		Krom.setVertexBuffer(buffer);
+		return 0;
+	}
+}