texture update

gistfile1.txt

			TextureDescriptor desc = s_renderMtl->m_textureDescriptor;
			desc.textureType = _depth > 1 ? MTLTextureType3D : MTLTextureType2D;
			desc.pixelFormat = m_ptr.pixelFormat();
			desc.width  = _rect.m_width;
			desc.height = _rect.m_height;
			desc.depth  = _depth;
			desc.mipmapLevelCount = 1;
			desc.sampleCount = 1;
			desc.arrayLength = 1;
			
			if (s_renderMtl->m_iOS9Runtime
				||  s_renderMtl->m_macOS11Runtime)
			{
				desc.cpuCacheMode = MTLCPUCacheModeDefaultCache;
				desc.storageMode  = BX_ENABLED(BX_PLATFORM_IOS)
				? (MTLStorageMode)0 // MTLStorageModeShared
				: (MTLStorageMode)1 // MTLStorageModeManaged
				;
				desc.usage        = 0;
			}
			
			Texture tempTexture = s_renderMtl->m_device.newTextureWithDescriptor(desc);

			MTLRegion region =
			{
				{ 0,     0,      0     },
				{ _rect.m_width, _rect.m_height, _depth },
			};

			tempTexture.replaceRegion(region, 0, 0, data, srcpitch, srcpitch * _rect.m_height);

			bce.copyFromTexture(tempTexture, 0, 0,  MTLOriginMake(0,0,0), MTLSizeMake(_rect.m_width, _rect.m_height, _depth),
								m_ptr, slice, _mip, MTLOriginMake(_rect.m_x, _rect.m_y, zz));

			
			release(tempTexture);