CODEWITHSUNDEEP
iosmacosgpumetal
Pony
Pony

Reputation: 129

Unrecognized selector error when creating MTLTexture object

I used the following code to create an MTLTexture object (for clarity, only part of the code is listed).

int tmpbuf[4096]
id<MTLDevice> device = MTLCreateSystemDefaultDevice();
MTLTextureDescriptor* desc = [MTLTextureDescriptor    texture2DDescriptorWithPixelFormat: MTLPixelFormatA8Unorm  width: 64 height:64 mipmapped: NO];
id<MTLTexture> input_texture    = [device newTextureWithDescpriptor:desc];

//memory for the texture
MTLOrigin texture_origin = { 0, 0,  0};
MTLSize   texture_size   = {64, 64, 0};
MTLRegion texture_region = {texture_origin, texture_size}; 
[input_texture  replaceRegion: texture_region mipmaplevel: 0 withBytes: tmpbuf bytesPerRow: 64 ];

When running the code: 

id<MTLTexture> input_texture    = [device newTextureWithDescpriptor:desc];

An error that [MTLIGAccelDevice newTextureWithDescpriptor:]: unrecognized selector sent to instance 0x7fd0a3012200 was reported. This code was compiled and run on the OS X system. I have no idea why this error happened.

Upvotes: 0

Views: 477

Answers (1)

gpu3d
gpu3d

Reputation: 1184

Make sure to first add a ; at the end of the first line and then add a non-null value for the third MTLSize argument. This code snippet below compiles just fine on my OS X 10.11.6 machine.

    int tmpbuf[4096];
    id<MTLDevice> device = MTLCreateSystemDefaultDevice();
    MTLTextureDescriptor* desc = [MTLTextureDescriptor texture2DDescriptorWithPixelFormat: MTLPixelFormatA8Unorm  width: 64 height:64 mipmapped: NO];
    id<MTLTexture> input_texture = [device newTextureWithDescriptor:desc];
    MTLOrigin texture_origin = { 0, 0,  0};
    MTLSize   texture_size   = {64, 64, 1};
    MTLRegion texture_region = {texture_origin, texture_size};
    [input_texture replaceRegion:texture_region mipmapLevel:0 withBytes:tmpbuf bytesPerRow:64];

Upvotes: 1

Related Questions