1  
 2  
 3  import Metal
 4  
 5  
 6  public class MlxImg
 7  {
 8      public var texture: MTLTexture
 9  ///    var texture_buff: MTLBuffer
10  
11      public var texture_sizeline: Int
12      public var texture_data: UnsafeMutablePointer<UInt32>
13      public var texture_width: Int
14      public var texture_height: Int
15  
16      public var onGPU = 0
17  
18       convenience public init(d device:MTLDevice, w width:Int, h height:Int)
19       {
20  	self.init(d:device, w:width, h:height, t:0)
21       }
22  
23       public init(d device:MTLDevice, w width:Int, h height:Int, t target:Int)
24       {
25  	 texture_width = width
26      	 texture_height = height
27      	 texture_sizeline = width * 4
28      	 texture_sizeline = 256 * (texture_sizeline / 256 + (texture_sizeline%256 >= 1 ? 1 : 0) )
29  
30           let textureDesc = MTLTextureDescriptor()
31      	 textureDesc.width = texture_width
32      	 textureDesc.height = texture_height
33  	 textureDesc.usage = .shaderRead
34  	 if (target == 1)
35  	  {
36  		textureDesc.usage = .renderTarget
37  		textureDesc.storageMode = .private
38  	  }
39      	 textureDesc.pixelFormat = MTLPixelFormat.bgra8Unorm
40      	 let texture_buff = device.makeBuffer(length: texture_sizeline * height)!
41      	 texture = texture_buff.makeTexture(descriptor:textureDesc, offset:0, bytesPerRow:texture_sizeline)!	
42  
43  	let tmpptr = texture_buff.contents()
44  	texture_data = tmpptr.assumingMemoryBound(to:UInt32.self)
45       }
46  
47  
48  }