It's a very stupid question. I want to play a video. According to Apple's official guide, I should reuse texture resources, so I choose replaceRegion, but the size of the pictures I choose is not consistent. Is there any way to put a bigger breakthrough into the previous small texture? , or I suppose to use the largest as the standard when creating textures from the beginning?
I am a beginner. I have learned a little bit of vulkan before, and it's my first time to use swift and metal. Is there any good learning path that you can recommend to me? Thanks!
if(changeRequest){
changeRequest = false
let region = MTLRegionMake2D(0, 0, Int(stagingBuffer.size.width), Int(stagingBuffer.size.height))
textures[currentFrame].replace(region: region, mipmapLevel: 0, withBytes: &stagingBuffer, bytesPerRow: Int(stagingBuffer.size.width * stagingBuffer.size.height) * 4)
}
If you want to reuse the texture, you will have to create it for the largest you texture plan on using. There is no way to enlarge the extent of a MTLTexture once it has been allocated.
Therefore it may make more sense to create textures the size needed, or a family of textures (eg 512x512, 768x768, 1024x1024).
Note that you can scale a MTLTexture using MPSImageLanczosScale, but it creates a new texture, so I don't think that is what you want to do.