51 lines
1.9 KiB
Swift
51 lines
1.9 KiB
Swift
//
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// MetalView.swift
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// chapter03
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//
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// Created by Marius on 1/12/16.
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// Copyright © 2016 Marius Horga. All rights reserved.
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//
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import MetalKit
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class MetalView: MTKView {
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override func drawRect(dirtyRect: NSRect) {
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super.drawRect(dirtyRect)
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render()
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}
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func render() {
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device = MTLCreateSystemDefaultDevice()
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let vertex_data:[Float] = [-1.0, -1.0, 0.0, 1.0,
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1.0, -1.0, 0.0, 1.0,
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0.0, 1.0, 0.0, 1.0]
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let data_size = vertex_data.count * sizeof(Float)
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let vertex_buffer = device!.newBufferWithBytes(vertex_data, length: data_size, options: [])
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let library = device!.newDefaultLibrary()!
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let vertex_func = library.newFunctionWithName("vertex_func")
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let frag_func = library.newFunctionWithName("fragment_func")
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let rpld = MTLRenderPipelineDescriptor()
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rpld.vertexFunction = vertex_func
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rpld.fragmentFunction = frag_func
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rpld.colorAttachments[0].pixelFormat = .BGRA8Unorm
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var rps: MTLRenderPipelineState! = nil
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do {
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try rps = device!.newRenderPipelineStateWithDescriptor(rpld)
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} catch let error {
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self.print("\(error)")
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}
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if let rpd = currentRenderPassDescriptor, drawable = currentDrawable {
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rpd.colorAttachments[0].clearColor = MTLClearColorMake(0, 0.5, 0.5, 1.0)
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let command_buffer = device!.newCommandQueue().commandBuffer()
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let command_encoder = command_buffer.renderCommandEncoderWithDescriptor(rpd)
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command_encoder.setRenderPipelineState(rps)
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command_encoder.setVertexBuffer(vertex_buffer, offset: 0, atIndex: 0)
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command_encoder.drawPrimitives(.Triangle, vertexStart: 0, vertexCount: 3, instanceCount: 1)
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command_encoder.endEncoding()
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command_buffer.presentDrawable(drawable)
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command_buffer.commit()
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}
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}
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}
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