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Move pipelineState into pixelPipeline

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Move configuration to its own method
This commit is contained in:
Eryn Wells 2018-10-11 11:26:09 -07:00
parent 80d4e6f043
commit 3808463e55
1 changed files with 44 additions and 30 deletions
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74
MetaballsKit/Renderer.swift
View file

@ -34,41 +34,21 @@ public class Renderer: NSObject, MTKViewDelegate {
let view = delegate.metalView
view.device = device
do {
let bundle = Bundle(for: type(of: self))
let library = try device.makeDefaultLibrary(bundle: bundle)
let vertexShader = library.makeFunction(name: "passthroughVertexShader")
let fragmentShader = library.makeFunction(name: "sampleToColorShader")
configure(pixelPipelineWithView: view)
let pipelineStateDescriptor = MTLRenderPipelineDescriptor()
pipelineStateDescriptor.label = "Render Pipeline"
pipelineStateDescriptor.vertexFunction = vertexShader
pipelineStateDescriptor.fragmentFunction = fragmentShader
if let renderAttachment = pipelineStateDescriptor.colorAttachments[0] {
renderAttachment.pixelFormat = view.colorPixelFormat
// Pulled all this from SO. I don't know what it means, but it makes the alpha channel work.
// TODO: Learn what this means???
// https://stackoverflow.com/q/43727335/1174185
renderAttachment.isBlendingEnabled = true
renderAttachment.alphaBlendOperation = .add
renderAttachment.rgbBlendOperation = .add
renderAttachment.sourceRGBBlendFactor = .sourceAlpha
renderAttachment.sourceAlphaBlendFactor = .sourceAlpha
renderAttachment.destinationRGBBlendFactor = .oneMinusSourceAlpha
renderAttachment.destinationAlphaBlendFactor = .oneMinusSourceAlpha
}
renderPipelineState = try device.makeRenderPipelineState(descriptor: pipelineStateDescriptor)
try delegate.field.setupMetal(withDevice: device)
} catch let e {
fatalError("\(e)")
}
try! delegate.field.setupMetal(withDevice: device)
}
}
private var device: MTLDevice
private lazy var library: MTLLibrary? = {
let bundle = Bundle(for: type(of: self))
return try? device.makeDefaultLibrary(bundle: bundle)
}()
private var commandQueue: MTLCommandQueue
private var renderPipelineState: MTLRenderPipelineState? = nil
private var pixelPipeline: MTLRenderPipelineState?
override public init() {
guard let device = MTLCreateSystemDefaultDevice() else {
@ -89,6 +69,40 @@ public class Renderer: NSObject, MTKViewDelegate {
self.delegate = delegate
}
private func configure(pixelPipelineWithView view: MTKView) {
guard let library = library else {
fatalError("Couldn't get Metal library")
}
let vertexShader = library.makeFunction(name: "passthroughVertexShader")
let fragmentShader = library.makeFunction(name: "sampleToColorShader")
let pipelineDesc = MTLRenderPipelineDescriptor()
pipelineDesc.label = "Pixel Pipeline"
pipelineDesc.vertexFunction = vertexShader
pipelineDesc.fragmentFunction = fragmentShader
if let renderAttachment = pipelineDesc.colorAttachments[0] {
renderAttachment.pixelFormat = view.colorPixelFormat
// Pulled all this from SO. I don't know what it means, but it makes the alpha channel work.
// TODO: Learn what this means???
// https://stackoverflow.com/q/43727335/1174185
renderAttachment.isBlendingEnabled = true
renderAttachment.alphaBlendOperation = .add
renderAttachment.rgbBlendOperation = .add
renderAttachment.sourceRGBBlendFactor = .sourceAlpha
renderAttachment.sourceAlphaBlendFactor = .sourceAlpha
renderAttachment.destinationRGBBlendFactor = .oneMinusSourceAlpha
renderAttachment.destinationAlphaBlendFactor = .oneMinusSourceAlpha
}
do {
pixelPipeline = try device.makeRenderPipelineState(descriptor: pipelineDesc)
} catch let e {
print("Couldn't set up pixel pipeline! \(e)")
pixelPipeline = nil
}
}
/// MARK: - MTKViewDelegate
public func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {
@ -118,7 +132,7 @@ public class Renderer: NSObject, MTKViewDelegate {
var didEncode = false
if let renderPass = view.currentRenderPassDescriptor,
let renderPipelineState = renderPipelineState,
let renderPipelineState = pixelPipeline,
let encoder = buffer.makeRenderCommandEncoder(descriptor: renderPass) {
encoder.label = "Render Pass"
encoder.setViewport(MTLViewport(originX: 0.0, originY: 0.0, width: Double(view.drawableSize.width), height: Double(view.drawableSize.height), znear: -1.0, zfar: 1.0))