using System;
using System.IO;
using System.Runtime.InteropServices;
using RefreshCS;
namespace MoonWorks.Graphics
{
///
/// A container for pixel data.
///
public class Texture : RefreshResource
{
public uint Width { get; internal set; }
public uint Height { get; internal set; }
public uint Depth { get; }
public TextureFormat Format { get; internal set; }
public bool IsCube { get; }
public uint LevelCount { get; }
public SampleCount SampleCount { get; }
public TextureUsageFlags UsageFlags { get; }
public uint Size { get; }
// FIXME: this allocates a delegate instance
protected override Action QueueDestroyFunction => Refresh.Refresh_QueueDestroyTexture;
///
/// Creates a 2D Texture using PNG or QOI data from raw byte data.
///
public static unsafe Texture FromImageBytes(
GraphicsDevice device,
CommandBuffer commandBuffer,
Span data
) {
Texture texture;
fixed (byte *dataPtr = data)
{
var pixels = Refresh.Refresh_Image_Load((nint) dataPtr, data.Length, out var width, out var height, out var len);
TextureCreateInfo textureCreateInfo = new TextureCreateInfo();
textureCreateInfo.Width = (uint) width;
textureCreateInfo.Height = (uint) height;
textureCreateInfo.Depth = 1;
textureCreateInfo.Format = TextureFormat.R8G8B8A8;
textureCreateInfo.IsCube = false;
textureCreateInfo.LevelCount = 1;
textureCreateInfo.SampleCount = SampleCount.One;
textureCreateInfo.UsageFlags = TextureUsageFlags.Sampler;
texture = new Texture(device, textureCreateInfo);
commandBuffer.SetTextureData(texture, pixels, (uint) len);
Refresh.Refresh_Image_Free(pixels);
}
return texture;
}
///
/// Creates a 2D Texture using PNG or QOI data from a stream.
///
public static unsafe Texture FromImageStream(
GraphicsDevice device,
CommandBuffer commandBuffer,
Stream stream
) {
var length = stream.Length;
var buffer = NativeMemory.Alloc((nuint) length);
var span = new Span(buffer, (int) length);
stream.ReadExactly(span);
var texture = FromImageBytes(device, commandBuffer, span);
NativeMemory.Free((void*) buffer);
return texture;
}
///
/// Creates a 2D Texture using PNG or QOI data from a file.
///
public static Texture FromImageFile(
GraphicsDevice device,
CommandBuffer commandBuffer,
string path
) {
var fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
return FromImageStream(device, commandBuffer, fileStream);
}
public static unsafe void SetDataFromImageBytes(
CommandBuffer commandBuffer,
TextureSlice textureSlice,
Span data
) {
fixed (byte* ptr = data)
{
var pixels = Refresh.Refresh_Image_Load(
(nint) ptr,
(int) data.Length,
out var w,
out var h,
out var len
);
commandBuffer.SetTextureData(textureSlice, pixels, (uint) len);
Refresh.Refresh_Image_Free(pixels);
}
}
///
/// Sets data for a texture slice using PNG or QOI data from a stream.
///
public static unsafe void SetDataFromImageStream(
CommandBuffer commandBuffer,
TextureSlice textureSlice,
Stream stream
) {
var length = stream.Length;
var buffer = NativeMemory.Alloc((nuint) length);
var span = new Span(buffer, (int) length);
stream.ReadExactly(span);
SetDataFromImageBytes(commandBuffer, textureSlice, span);
NativeMemory.Free((void*) buffer);
}
///
/// Sets data for a texture slice using PNG or QOI data from a file.
///
public static void SetDataFromImageFile(
CommandBuffer commandBuffer,
TextureSlice textureSlice,
string path
) {
var fileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
SetDataFromImageStream(commandBuffer, textureSlice, fileStream);
}
public unsafe static Texture LoadDDS(GraphicsDevice graphicsDevice, CommandBuffer commandBuffer, System.IO.Stream stream)
{
using var reader = new BinaryReader(stream);
Texture texture;
int faces;
ParseDDS(reader, out var format, out var width, out var height, out var levels, out var isCube);
if (isCube)
{
texture = CreateTextureCube(graphicsDevice, (uint) width, format, TextureUsageFlags.Sampler, (uint) levels);
faces = 6;
}
else
{
texture = CreateTexture2D(graphicsDevice, (uint) width, (uint) height, format, TextureUsageFlags.Sampler, (uint) levels);
faces = 1;
}
for (int i = 0; i < faces; i += 1)
{
for (int j = 0; j < levels; j += 1)
{
var levelWidth = width >> j;
var levelHeight = height >> j;
var levelSize = CalculateDDSLevelSize(levelWidth, levelHeight, format);
var byteBuffer = NativeMemory.Alloc((nuint) levelSize);
var byteSpan = new Span(byteBuffer, levelSize);
stream.ReadExactly(byteSpan);
var textureSlice = new TextureSlice(texture, new Rect(0, 0, levelWidth, levelHeight), 0, (uint) i, (uint) j);
commandBuffer.SetTextureData(textureSlice, (nint) byteBuffer, (uint) levelSize);
NativeMemory.Free(byteBuffer);
}
}
return texture;
}
///
/// Creates a 2D texture.
///
/// An initialized GraphicsDevice.
/// The width of the texture.
/// The height of the texture.
/// The format of the texture.
/// Specifies how the texture will be used.
/// Specifies the number of mip levels.
public static Texture CreateTexture2D(
GraphicsDevice device,
uint width,
uint height,
TextureFormat format,
TextureUsageFlags usageFlags,
uint levelCount = 1,
SampleCount sampleCount = SampleCount.One
) {
var textureCreateInfo = new TextureCreateInfo
{
Width = width,
Height = height,
Depth = 1,
IsCube = false,
LevelCount = levelCount,
SampleCount = sampleCount,
Format = format,
UsageFlags = usageFlags
};
return new Texture(device, textureCreateInfo);
}
///
/// Creates a 3D texture.
///
/// An initialized GraphicsDevice.
/// The width of the texture.
/// The height of the texture.
/// The depth of the texture.
/// The format of the texture.
/// Specifies how the texture will be used.
/// Specifies the number of mip levels.
public static Texture CreateTexture3D(
GraphicsDevice device,
uint width,
uint height,
uint depth,
TextureFormat format,
TextureUsageFlags usageFlags,
uint levelCount = 1
) {
var textureCreateInfo = new TextureCreateInfo
{
Width = width,
Height = height,
Depth = depth,
IsCube = false,
LevelCount = levelCount,
Format = format,
UsageFlags = usageFlags
};
return new Texture(device, textureCreateInfo);
}
///
/// Creates a cube texture.
///
/// An initialized GraphicsDevice.
/// The length of one side of the cube.
/// The format of the texture.
/// Specifies how the texture will be used.
/// Specifies the number of mip levels.
public static Texture CreateTextureCube(
GraphicsDevice device,
uint size,
TextureFormat format,
TextureUsageFlags usageFlags,
uint levelCount = 1
) {
var textureCreateInfo = new TextureCreateInfo
{
Width = size,
Height = size,
Depth = 1,
IsCube = true,
LevelCount = levelCount,
Format = format,
UsageFlags = usageFlags
};
return new Texture(device, textureCreateInfo);
}
///
/// Creates a new texture using a TextureCreateInfo struct.
///
/// An initialized GraphicsDevice.
/// The parameters to use when creating the texture.
public Texture(
GraphicsDevice device,
in TextureCreateInfo textureCreateInfo
) : base(device)
{
Handle = Refresh.Refresh_CreateTexture(
device.Handle,
textureCreateInfo.ToRefreshTextureCreateInfo()
);
Format = textureCreateInfo.Format;
Width = textureCreateInfo.Width;
Height = textureCreateInfo.Height;
Depth = textureCreateInfo.Depth;
IsCube = textureCreateInfo.IsCube;
LevelCount = textureCreateInfo.LevelCount;
SampleCount = textureCreateInfo.SampleCount;
UsageFlags = textureCreateInfo.UsageFlags;
Size = Width * Height * BytesPerPixel(Format) / BlockSizeSquared(Format);
}
public static implicit operator TextureSlice(Texture t) => new TextureSlice(t);
// Used by AcquireSwapchainTexture.
// Should not be tracked, because swapchain textures are managed by Vulkan.
internal Texture(
GraphicsDevice device,
TextureFormat format
) : base(device)
{
Handle = IntPtr.Zero;
Format = format;
Width = 0;
Height = 0;
Depth = 1;
IsCube = false;
LevelCount = 1;
SampleCount = SampleCount.One;
UsageFlags = TextureUsageFlags.ColorTarget;
Size = Width * Height * BytesPerPixel(Format) / BlockSizeSquared(Format);
}
// DDS loading extension, based on MojoDDS
// Taken from https://github.com/FNA-XNA/FNA/blob/1e49f868f595f62bc6385db45949a03186a7cd7f/src/Graphics/Texture.cs#L194
private static void ParseDDS(
BinaryReader reader,
out TextureFormat format,
out int width,
out int height,
out int levels,
out bool isCube
) {
// A whole bunch of magic numbers, yay DDS!
const uint DDS_MAGIC = 0x20534444;
const uint DDS_HEADERSIZE = 124;
const uint DDS_PIXFMTSIZE = 32;
const uint DDSD_HEIGHT = 0x2;
const uint DDSD_WIDTH = 0x4;
const uint DDSD_PITCH = 0x8;
const uint DDSD_LINEARSIZE = 0x80000;
const uint DDSD_REQ = (
DDSD_HEIGHT | DDSD_WIDTH
);
const uint DDSCAPS_MIPMAP = 0x400000;
const uint DDSCAPS_TEXTURE = 0x1000;
const uint DDSCAPS2_CUBEMAP = 0x200;
const uint DDPF_FOURCC = 0x4;
const uint DDPF_RGB = 0x40;
const uint FOURCC_DXT1 = 0x31545844;
const uint FOURCC_DXT3 = 0x33545844;
const uint FOURCC_DXT5 = 0x35545844;
const uint FOURCC_DX10 = 0x30315844;
const uint pitchAndLinear = (
DDSD_PITCH | DDSD_LINEARSIZE
);
// File should start with 'DDS '
if (reader.ReadUInt32() != DDS_MAGIC)
{
throw new NotSupportedException("Not a DDS!");
}
// Texture info
uint size = reader.ReadUInt32();
if (size != DDS_HEADERSIZE)
{
throw new NotSupportedException("Invalid DDS header!");
}
uint flags = reader.ReadUInt32();
if ((flags & DDSD_REQ) != DDSD_REQ)
{
throw new NotSupportedException("Invalid DDS flags!");
}
if ((flags & pitchAndLinear) == pitchAndLinear)
{
throw new NotSupportedException("Invalid DDS flags!");
}
height = reader.ReadInt32();
width = reader.ReadInt32();
reader.ReadUInt32(); // dwPitchOrLinearSize, unused
reader.ReadUInt32(); // dwDepth, unused
levels = reader.ReadInt32();
// "Reserved"
reader.ReadBytes(4 * 11);
// Format info
uint formatSize = reader.ReadUInt32();
if (formatSize != DDS_PIXFMTSIZE)
{
throw new NotSupportedException("Bogus PIXFMTSIZE!");
}
uint formatFlags = reader.ReadUInt32();
uint formatFourCC = reader.ReadUInt32();
uint formatRGBBitCount = reader.ReadUInt32();
uint formatRBitMask = reader.ReadUInt32();
uint formatGBitMask = reader.ReadUInt32();
uint formatBBitMask = reader.ReadUInt32();
uint formatABitMask = reader.ReadUInt32();
// dwCaps "stuff"
uint caps = reader.ReadUInt32();
if ((caps & DDSCAPS_TEXTURE) == 0)
{
throw new NotSupportedException("Not a texture!");
}
isCube = false;
uint caps2 = reader.ReadUInt32();
if (caps2 != 0)
{
if ((caps2 & DDSCAPS2_CUBEMAP) == DDSCAPS2_CUBEMAP)
{
isCube = true;
}
else
{
throw new NotSupportedException("Invalid caps2!");
}
}
reader.ReadUInt32(); // dwCaps3, unused
reader.ReadUInt32(); // dwCaps4, unused
// "Reserved"
reader.ReadUInt32();
// Mipmap sanity check
if ((caps & DDSCAPS_MIPMAP) != DDSCAPS_MIPMAP)
{
levels = 1;
}
// Determine texture format
if ((formatFlags & DDPF_FOURCC) == DDPF_FOURCC)
{
switch (formatFourCC)
{
case 0x71: // D3DFMT_A16B16G16R16F
format = TextureFormat.R16G16B16A16_SFLOAT;
break;
case 0x74: // D3DFMT_A32B32G32R32F
format = TextureFormat.R32G32B32A32_SFLOAT;
break;
case FOURCC_DXT1:
format = TextureFormat.BC1;
break;
case FOURCC_DXT3:
format = TextureFormat.BC2;
break;
case FOURCC_DXT5:
format = TextureFormat.BC3;
break;
case FOURCC_DX10:
// If the fourCC is DX10, there is an extra header with additional format information.
uint dxgiFormat = reader.ReadUInt32();
// These values are taken from the DXGI_FORMAT enum.
switch (dxgiFormat)
{
case 2:
format = TextureFormat.R32G32B32A32_SFLOAT;
break;
case 10:
format = TextureFormat.R16G16B16A16_SFLOAT;
break;
case 71:
format = TextureFormat.BC1;
break;
case 74:
format = TextureFormat.BC2;
break;
case 77:
format = TextureFormat.BC3;
break;
case 98:
format = TextureFormat.BC7;
break;
default:
throw new NotSupportedException(
"Unsupported DDS texture format"
);
}
uint resourceDimension = reader.ReadUInt32();
// These values are taken from the D3D10_RESOURCE_DIMENSION enum.
switch (resourceDimension)
{
case 0: // Unknown
case 1: // Buffer
throw new NotSupportedException(
"Unsupported DDS texture format"
);
default:
break;
}
/*
* This flag seemingly only indicates if the texture is a cube map.
* This is already determined above. Cool!
*/
uint miscFlag = reader.ReadUInt32();
/*
* Indicates the number of elements in the texture array.
* We don't support texture arrays so just throw if it's greater than 1.
*/
uint arraySize = reader.ReadUInt32();
if (arraySize > 1)
{
throw new NotSupportedException(
"Unsupported DDS texture format"
);
}
reader.ReadUInt32(); // reserved
break;
default:
throw new NotSupportedException(
"Unsupported DDS texture format"
);
}
}
else if ((formatFlags & DDPF_RGB) == DDPF_RGB)
{
if ( formatRGBBitCount != 32 ||
formatRBitMask != 0x00FF0000 ||
formatGBitMask != 0x0000FF00 ||
formatBBitMask != 0x000000FF ||
formatABitMask != 0xFF000000 )
{
throw new NotSupportedException(
"Unsupported DDS texture format"
);
}
format = TextureFormat.B8G8R8A8;
}
else
{
throw new NotSupportedException(
"Unsupported DDS texture format"
);
}
}
private static int CalculateDDSLevelSize(
int width,
int height,
TextureFormat format
) {
if (format == TextureFormat.R8G8B8A8)
{
return (((width * 32) + 7) / 8) * height;
}
else if (format == TextureFormat.R16G16B16A16_SFLOAT)
{
return (((width * 64) + 7) / 8) * height;
}
else if (format == TextureFormat.R32G32B32A32_SFLOAT)
{
return (((width * 128) + 7) / 8) * height;
}
else
{
int blockSize = 16;
if (format == TextureFormat.BC1)
{
blockSize = 8;
}
width = System.Math.Max(width, 1);
height = System.Math.Max(height, 1);
return (
((width + 3) / 4) *
((height + 3) / 4) *
blockSize
);
}
}
///
/// Asynchronously saves RGBA or BGRA pixel data to a file in PNG format.
/// Warning: this is expensive and will block to wait for data download from GPU!
/// You can avoid blocking by calling this method from a thread.
///
public unsafe void SavePNG(string path)
{
#if DEBUG
if (Format != TextureFormat.R8G8B8A8 && Format != TextureFormat.B8G8R8A8)
{
throw new ArgumentException("Texture format must be RGBA or BGRA!", "format");
}
#endif
var buffer = new Buffer(Device, 0, Width * Height * 4); // this creates garbage... oh well
// immediately request the data copy
var commandBuffer = Device.AcquireCommandBuffer();
commandBuffer.CopyTextureToBuffer(this, buffer);
var fence = Device.SubmitAndAcquireFence(commandBuffer);
var byteCount = buffer.Size;
var pixelsPtr = NativeMemory.Alloc((nuint) byteCount);
var pixelsSpan = new Span(pixelsPtr, (int) byteCount);
Device.WaitForFences(fence); // make sure the data transfer is done...
Device.ReleaseFence(fence); // and then release the fence
buffer.GetData(pixelsSpan);
if (Format == TextureFormat.B8G8R8A8)
{
var rgbaPtr = NativeMemory.Alloc((nuint) byteCount);
var rgbaSpan = new Span(rgbaPtr, (int) byteCount);
for (var i = 0; i < byteCount; i += 4)
{
rgbaSpan[i] = pixelsSpan[i + 2];
rgbaSpan[i + 1] = pixelsSpan[i + 1];
rgbaSpan[i + 2] = pixelsSpan[i];
rgbaSpan[i + 3] = pixelsSpan[i + 3];
}
Refresh.Refresh_Image_SavePNG(path, (nint) rgbaPtr, (int) Width, (int) Height);
NativeMemory.Free((void*) rgbaPtr);
}
else
{
fixed (byte* ptr = pixelsSpan)
{
Refresh.Refresh_Image_SavePNG(path, (nint) ptr, (int) Width, (int) Height);
}
}
NativeMemory.Free(pixelsPtr);
}
public static uint BytesPerPixel(TextureFormat format)
{
switch (format)
{
case TextureFormat.R8:
case TextureFormat.R8_UINT:
return 1;
case TextureFormat.R5G6B5:
case TextureFormat.B4G4R4A4:
case TextureFormat.A1R5G5B5:
case TextureFormat.R16_SFLOAT:
case TextureFormat.R8G8_SNORM:
case TextureFormat.R8G8_UINT:
case TextureFormat.R16_UINT:
case TextureFormat.D16:
return 2;
case TextureFormat.D16S8:
return 3;
case TextureFormat.R8G8B8A8:
case TextureFormat.B8G8R8A8:
case TextureFormat.R32_SFLOAT:
case TextureFormat.R16G16:
case TextureFormat.R16G16_SFLOAT:
case TextureFormat.R8G8B8A8_SNORM:
case TextureFormat.A2R10G10B10:
case TextureFormat.R8G8B8A8_UINT:
case TextureFormat.R16G16_UINT:
case TextureFormat.D32:
return 4;
case TextureFormat.D32S8:
return 5;
case TextureFormat.R16G16B16A16_SFLOAT:
case TextureFormat.R16G16B16A16:
case TextureFormat.R32G32_SFLOAT:
case TextureFormat.R16G16B16A16_UINT:
case TextureFormat.BC1:
return 8;
case TextureFormat.R32G32B32A32_SFLOAT:
case TextureFormat.BC2:
case TextureFormat.BC3:
case TextureFormat.BC7:
return 16;
default:
Logger.LogError("Texture format not recognized!");
return 0;
}
}
public static uint BlockSizeSquared(TextureFormat format)
{
switch (format)
{
case TextureFormat.BC1:
case TextureFormat.BC2:
case TextureFormat.BC3:
case TextureFormat.BC7:
return 16;
case TextureFormat.R8G8B8A8:
case TextureFormat.B8G8R8A8:
case TextureFormat.R5G6B5:
case TextureFormat.A1R5G5B5:
case TextureFormat.B4G4R4A4:
case TextureFormat.A2R10G10B10:
case TextureFormat.R16G16:
case TextureFormat.R16G16B16A16:
case TextureFormat.R8:
case TextureFormat.R8G8_SNORM:
case TextureFormat.R8G8B8A8_SNORM:
case TextureFormat.R16_SFLOAT:
case TextureFormat.R16G16_SFLOAT:
case TextureFormat.R16G16B16A16_SFLOAT:
case TextureFormat.R32_SFLOAT:
case TextureFormat.R32G32_SFLOAT:
case TextureFormat.R32G32B32A32_SFLOAT:
case TextureFormat.R8_UINT:
case TextureFormat.R8G8_UINT:
case TextureFormat.R8G8B8A8_UINT:
case TextureFormat.R16_UINT:
case TextureFormat.R16G16_UINT:
case TextureFormat.R16G16B16A16_UINT:
case TextureFormat.D16:
case TextureFormat.D32:
case TextureFormat.D16S8:
case TextureFormat.D32S8:
return 1;
default:
Logger.LogError("Texture format not recognized!");
return 0;
}
}
}
}