如何从数组文字正确创建 MTLTexture？答案

【问题标题】：How do I properly create an MTLTexture from an array literal?如何从数组文字正确创建 MTLTexture？
【发布时间】：2020-11-17 03:12:57
【问题描述】：

这里的想法是创建两个黑色和两个灰色像素的纹理

let TextureDescriptor = MTLTextureDescriptor.texture2DDescriptor(pixelFormat: View.colorPixelFormat, width: 2, height: 2, mipmapped: Settings.Mipmaps > 0)
Texture = Device.makeBuffer(bytes: [UInt8](arrayLiteral: 127, 127, 127, 255, 0, 0, 0, 255, 127, 127, 127, 255, 0, 0, 0, 255), length: 16)?.makeTexture(descriptor: TextureDescriptor, offset: 0, bytesPerRow: 8)

但是，首先，它抱怨 bytesPerRow 未与 256 对齐，如果我更改它和缓冲区，它会出现其他问题，例如 resourceOptions (0x10) must match backing buffer resource options (0x0)，那么我如何从数组中初始化 MTL 纹理数字，代表红色、绿色、蓝色、alpha，并给定纹理宽度和高度？

【问题讨论】：

标签： swift textures metal

【解决方案1】：

我不得不使用MTLTexture.replace()，但说真的，你不想存储这样的纹理！

Texture = Device.makeTexture(descriptor: TextureDescriptor)
Texture?.replace(region: MTLRegionMake2D(0, 0, 16, 16), mipmapLevel: 0, slice: 0, withBytes: [UInt8]([127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 127, 127, 127, 255, 143, 143, 143, 255, 143, 143, 143, 255, 104, 104, 104, 255, 143, 143, 143, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 116, 116, 116, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 104, 104, 104, 255, 127, 127, 127, 255, 127, 127, 127, 255, 116, 116, 116, 255, 127, 127, 127, 255, 104, 104, 104, 255, 116, 116, 116, 255, 116, 116, 116, 255, 251, 206, 119, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 143, 143, 143, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 254, 231, 199, 255, 251, 206, 119, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 143, 143, 143, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 104, 104, 104, 255, 127, 127, 127, 255, 254, 231, 199, 255, 245, 236, 93, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 143, 143, 143, 255, 143, 143, 143, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 104, 104, 104, 255, 116, 116, 116, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 255, 255, 255, 255, 254, 231, 199, 255, 116, 116, 116, 255, 127, 127, 127, 255, 104, 104, 104, 255, 255, 255, 255, 255, 254, 231, 199, 255, 116, 116, 116, 255, 116, 116, 116, 255, 104, 104, 104, 255, 127, 127, 127, 255, 143, 143, 143, 255, 143, 143, 143, 255, 127, 127, 127, 255, 255, 255, 255, 255, 254, 231, 199, 255, 251, 206, 119, 255, 251, 206, 119, 255, 245, 236, 93, 255, 127, 127, 127, 255, 127, 127, 127, 255, 251, 206, 119, 255, 245, 236, 93, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 104, 104, 104, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 104, 104, 104, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 254, 231, 199, 255, 251, 206, 119, 255, 104, 104, 104, 255, 143, 143, 143, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 255, 255, 255, 255, 254, 231, 199, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 254, 231, 199, 255, 245, 236, 93, 255, 245, 236, 93, 255, 245, 236, 93, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 143, 143, 143, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 143, 143, 143, 255, 116, 116, 116, 255, 251, 206, 119, 255, 143, 143, 143, 255, 143, 143, 143, 255, 116, 116, 116, 255, 104, 104, 104, 255, 116, 116, 116, 255, 143, 143, 143, 255, 143, 143, 143, 255, 143, 143, 143, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 104, 104, 104, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 143, 143, 143, 255, 143, 143, 143, 255, 127, 127, 127, 255, 254, 231, 199, 255, 245, 236, 93, 255, 143, 143, 143, 255, 143, 143, 143, 255, 104, 104, 104, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 254, 231, 199, 255, 255, 255, 255, 255, 254, 231, 199, 255, 251, 206, 119, 255, 251, 206, 119, 255, 245, 236, 93, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 143, 143, 143, 255, 116, 116, 116, 255, 254, 231, 199, 255, 245, 236, 93, 255, 127, 127, 127, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 245, 236, 93, 255, 245, 236, 93, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 143, 143, 143, 255, 143, 143, 143, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255, 143, 143, 143, 255, 143, 143, 143, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 104, 104, 104, 255, 143, 143, 143, 255, 143, 143, 143, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 127, 127, 127, 255, 116, 116, 116, 255, 116, 116, 116, 255, 116, 116, 116, 255, 127, 127, 127, 255, 127, 127, 127, 255]), bytesPerRow: 16*4, bytesPerImage: 1024)

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