public MgTextureInfo Load(byte[] imageData, MgImageSource source, IMgAllocationCallbacks allocator, IMgFence fence)
{
// Prefer using optimal tiling, as linear tiling
// may support only a small set of features
// depending on implementation (e.g. no mip maps, only one layer, etc.)
IMgImage mappableImage;
IMgDeviceMemory mappableMemory;
uint mipLevels = (uint)source.Mipmaps.Length;
// Load mip map level 0 to linear tiling image
var imageCreateInfo = new MgImageCreateInfo
{
ImageType = MgImageType.TYPE_2D,
Format = source.Format,
MipLevels = mipLevels,
ArrayLayers = 1,
Samples = MgSampleCountFlagBits.COUNT_1_BIT,
Tiling = MgImageTiling.LINEAR,
Usage = MgImageUsageFlagBits.SAMPLED_BIT,
SharingMode = MgSharingMode.EXCLUSIVE,
InitialLayout = MgImageLayout.PREINITIALIZED,
Extent = new MgExtent3D {
Width = source.Width,
Height = source.Height,
Depth = 1
},
};
var device = mGraphicsConfiguration.Device;
var err = device.CreateImage(imageCreateInfo, allocator, out mappableImage);
Debug.Assert(err == Result.SUCCESS, err + " != Result.SUCCESS");
// Get memory requirements for this image
// like size and alignment
MgMemoryRequirements memReqs;
device.GetImageMemoryRequirements(mappableImage, out memReqs);
// Set memory allocation size to required memory size
var memAllocInfo = new MgMemoryAllocateInfo
{
AllocationSize = memReqs.Size,
};
Debug.Assert(mGraphicsConfiguration.Partition != null);
// Get memory type that can be mapped to host memory
uint memoryTypeIndex;
bool isValid = mGraphicsConfiguration.Partition.GetMemoryType(memReqs.MemoryTypeBits, MgMemoryPropertyFlagBits.HOST_VISIBLE_BIT, out memoryTypeIndex);
Debug.Assert(isValid);
memAllocInfo.MemoryTypeIndex = memoryTypeIndex;
// Allocate host memory
err = device.AllocateMemory(memAllocInfo, allocator, out mappableMemory);
Debug.Assert(err == Result.SUCCESS, err + " != Result.SUCCESS");
// Bind allocated image for use
err = mappableImage.BindImageMemory(device, mappableMemory, 0);
Debug.Assert(err == Result.SUCCESS, err + " != Result.SUCCESS");
// Get sub resource layout
// Mip map count, array layer, etc.
var subRes = new MgImageSubresource
{
AspectMask = MgImageAspectFlagBits.COLOR_BIT,
};
MgSubresourceLayout subResLayout;
IntPtr data;
// Get sub resources layout
// Includes row pitch, size offsets, etc.
device.GetImageSubresourceLayout(mappableImage, subRes, out subResLayout);
// Map image memory
err = mappableMemory.MapMemory(device, 0, memReqs.Size, 0, out data);
Debug.Assert(err == Result.SUCCESS, err + " != Result.SUCCESS");
// Copy image data into memory
//memcpy(data, tex2D[subRes.mipLevel].data(), tex2D[subRes.mipLevel].size());
Marshal.Copy(imageData, 0, data, (int)source.Size);
mappableMemory.UnmapMemory(device);
// Linear tiled images don't need to be staged
// and can be directly used as textures
var texture = new MgTextureInfo {
Image = mappableImage,
DeviceMemory = mappableMemory,
ImageLayout = MgImageLayout.SHADER_READ_ONLY_OPTIMAL,
};
var cmdPool = mGraphicsConfiguration.Partition.CommandPool;
var cmdBufAllocateInfo = new MgCommandBufferAllocateInfo
{
CommandPool = cmdPool,
Level = MgCommandBufferLevel.PRIMARY,
CommandBufferCount = 1,
};
var commands = new IMgCommandBuffer[1];
err = device.AllocateCommandBuffers(cmdBufAllocateInfo, commands);
Debug.Assert(err == Result.SUCCESS, err + " != Result.SUCCESS");
var cmdBufInfo = new MgCommandBufferBeginInfo
{
Flags = 0,
};
texture.Command = commands [0];
err = commands[0].BeginCommandBuffer(cmdBufInfo);
Debug.Assert(err == Result.SUCCESS, err + " != Result.SUCCESS");
// Setup image memory barrier transfer image to shader read layout
mImageTools.SetImageLayout(
texture.Command,
texture.Image,
MgImageAspectFlagBits.COLOR_BIT,
MgImageLayout.PREINITIALIZED,
texture.ImageLayout,
0,
mipLevels);
err = texture.Command.EndCommandBuffer();
Debug.Assert(err == Result.SUCCESS, err + " != Result.SUCCESS");
var submitInfo = new MgSubmitInfo {
CommandBuffers = commands,
};
var queue = mGraphicsConfiguration.Queue;
queue.QueueSubmit(new[] { submitInfo }, fence);
// // NOT SURE IF
// err = queue.QueueWaitIdle();
// Debug.Assert (err == Result.SUCCESS, err + " != Result.SUCCESS");
//
// device.FreeCommandBuffers(cmdPool, commands);
// texture.Command = copyCmd;
return(texture);
}
internal extern static void vkGetImageSubresourceLayout(IntPtr device, UInt64 image, [In] Magnesium.MgImageSubresource pSubresource, [In, Out] Magnesium.MgSubresourceLayout pLayout);
