private static unsafe void EncodeImage(PixelBuffer image, WICFlags flags, IWICBitmapFrameEncode frame)
{
Guid pfGuid;
if (!ToWIC(image.Format, out pfGuid))
{
throw new NotSupportedException("Format not supported");
}
frame.Initialize();
frame.SetSize(image.Width, image.Height);
frame.SetResolution(72, 72);
var targetGuid = pfGuid;
frame.SetPixelFormat(ref targetGuid);
if (targetGuid != pfGuid)
{
using (var source = Factory.CreateBitmapFromMemory(image.Width, image.Height, pfGuid, image.RowStride, image.BufferStride, image.DataPointer.ToPointer()))
{
using (var converter = Factory.CreateFormatConverter())
{
using (var palette = Factory.CreatePalette())
{
palette.InitializeFromBitmap(source, 256, true);
converter.Initialize(source, targetGuid, GetWICDither(flags), palette, 0, BitmapPaletteType.Custom);
var bpp = GetBitsPerPixel(targetGuid);
if (bpp == 0)
{
throw new NotSupportedException("Unable to determine the Bpp for the target format");
}
var rowPitch = (image.Width * bpp + 7) / 8;
var slicePitch = rowPitch * image.Height;
var temp = SdxUtilities.AllocateMemory(slicePitch);
try
{
converter.CopyPixels(rowPitch, slicePitch, temp);
frame.SetPalette(palette);
frame.WritePixels(image.Height, temp, rowPitch, slicePitch);
}
finally
{
SdxUtilities.FreeMemory(temp);
}
}
}
}
}
else
{
// No conversion required
frame.WritePixels(image.Height, image.DataPointer, image.RowStride, image.BufferStride);
}
frame.Commit();
}
internal unsafe void Initialize(ImageDescription description, IntPtr dataPointer, int offset, GCHandle?handle, bool bufferIsDisposable, PitchFlags pitchFlags = PitchFlags.None)
{
if (!FormatHelper.IsValid(description.Format) ||
FormatHelper.IsVideo(description.Format))
{
throw new InvalidOperationException("Unsupported DXGI Format");
}
this.handle = handle;
switch (description.Dimension)
{
case TextureDimension.Texture1D:
if (description.Width <= 0 || description.Height != 1 || description.Depth != 1 || description.ArraySize == 0)
{
throw new InvalidOperationException("Invalid Width/Height/Depth/ArraySize for Image 1D");
}
// Check that miplevels are fine
description.MipLevels = MipMapHelper.CalculateMipLevels(description.Width, 1, description.MipLevels);
break;
case TextureDimension.Texture2D:
case TextureDimension.TextureCube:
if (description.Width <= 0 || description.Height <= 0 || description.Depth != 1 || description.ArraySize == 0)
{
throw new InvalidOperationException("Invalid Width/Height/Depth/ArraySize for Image 2D");
}
if (description.Dimension == TextureDimension.TextureCube)
{
if (description.ArraySize % 6 != 0)
{
throw new InvalidOperationException("TextureCube must have an arraysize = 6");
}
}
// Check that miplevels are fine
description.MipLevels = MipMapHelper.CalculateMipLevels(description.Width, description.Height, description.MipLevels);
break;
case TextureDimension.Texture3D:
if (description.Width <= 0 || description.Height <= 0 || description.Depth <= 0 || description.ArraySize != 1)
{
throw new InvalidOperationException("Invalid Width/Height/Depth/ArraySize for Image 3D");
}
// Check that miplevels are fine
description.MipLevels = MipMapHelper.CalculateMipLevels(description.Width, description.Height, description.Depth, description.MipLevels);
break;
}
// Calculate mipmaps
int pixelBufferCount;
mipMapToZIndex = CalculateImageArray(description, pitchFlags, out pixelBufferCount, out totalSizeInBytes);
mipmapDescriptions = CalculateMipMapDescription(description, pitchFlags);
zBufferCountPerArraySlice = mipMapToZIndex[mipMapToZIndex.Count - 1];
// Allocate all pixel buffers
pixelBuffers = new PixelBuffer[pixelBufferCount];
pixelBufferArray = new PixelBufferArray(this);
// Setup all pointers
// only release buffer that is not pinned and is asked to be disposed.
this.bufferIsDisposable = !handle.HasValue && bufferIsDisposable;
buffer = dataPointer;
if (dataPointer == IntPtr.Zero)
{
buffer = SdxUtilities.AllocateMemory(totalSizeInBytes);
offset = 0;
this.bufferIsDisposable = true;
}
SetupImageArray((IntPtr)((byte *)buffer + offset), totalSizeInBytes, description, pitchFlags, pixelBuffers);
Description = description;
// PreCompute databoxes
dataBoxArray = this.ComputeDataBox();
}
