internal static DxfSection FromBuffer(DxfCodePairBufferReader buffer, DxfAcadVersion version)
{
Debug.Assert(buffer.ItemsRemain);
var sectionType = buffer.Peek();
buffer.Advance();
if (sectionType.Code != 2)
{
throw new DxfReadException($"Expected code 2, got {sectionType.Code}", sectionType);
}
DxfSection section;
switch (sectionType.StringValue)
{
case BlocksSectionText:
section = DxfBlocksSection.BlocksSectionFromBuffer(buffer, version);
break;
case ClassesSectionText:
section = DxfClassesSection.ClassesSectionFromBuffer(buffer, version);
break;
case EntitiesSectionText:
section = DxfEntitiesSection.EntitiesSectionFromBuffer(buffer);
break;
case HeaderSectionText:
section = DxfHeaderSection.HeaderSectionFromBuffer(buffer);
break;
case ObjectsSectionText:
section = DxfObjectsSection.ObjectsSectionFromBuffer(buffer);
break;
case TablesSectionText:
section = DxfTablesSection.TablesSectionFromBuffer(buffer);
break;
case ThumbnailImageSectionText:
section = DxfThumbnailImageSection.ThumbnailImageSectionFromBuffer(buffer);
break;
default:
SwallowSection(buffer);
section = null;
break;
}
return(section);
}
internal static DxfThumbnailImageSection ThumbnailImageSectionFromBuffer(DxfCodePairBufferReader buffer)
{
if (buffer.ItemsRemain)
{
var lengthPair = buffer.Peek();
buffer.Advance();
if (lengthPair.Code != 90)
{
return(null);
}
var length = lengthPair.IntegerValue;
var lines = new List <string>();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
buffer.Advance();
if (DxfCodePair.IsSectionEnd(pair))
{
break;
}
Debug.Assert(pair.Code == 310);
lines.Add(pair.StringValue);
}
var section = new DxfThumbnailImageSection();
section.Clear();
section.RawData = DxfCommonConverters.HexBytes(string.Join(string.Empty, lines.ToArray()));
return(section);
}
return(null);
}
internal static DxfThumbnailImageSection ThumbnailImageSectionFromBuffer(DxfCodePairBufferReader buffer)
{
if (buffer.ItemsRemain)
{
var lengthPair = buffer.Peek();
buffer.Advance();
if (lengthPair.Code != 90)
{
return(null);
}
var length = lengthPair.IntegerValue;
var rawData = new List <byte>();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
buffer.Advance();
if (DxfCodePair.IsSectionEnd(pair))
{
break;
}
Debug.Assert(pair.Code == 310);
rawData.AddRange(pair.BinaryValue);
}
var section = new DxfThumbnailImageSection();
section.Clear();
section.RawData = rawData.ToArray();
return(section);
}
return(null);
}
/// <summary>
/// Sets the bitmap thumbnail.
/// </summary>
/// <param name="thumbnail">Raw data of the thumbnail image. Should be a 256-color bitmap, 180 pixels wide, any height.</param>
public void SetThumbnailBitmap(byte[] thumbnail)
{
if (ThumbnailImageSection == null)
ThumbnailImageSection = new DxfThumbnailImageSection();
ThumbnailImageSection.SetThumbnailBitmap(thumbnail);
}
internal static DxfThumbnailImageSection ThumbnailImageSectionFromBuffer(DxfCodePairBufferReader buffer)
{
if (buffer.ItemsRemain)
{
var lengthPair = buffer.Peek();
buffer.Advance();
if (lengthPair.Code != 90)
{
return null;
}
var length = lengthPair.IntegerValue;
var lines = new List<string>();
while (buffer.ItemsRemain)
{
var pair = buffer.Peek();
buffer.Advance();
if (DxfCodePair.IsSectionEnd(pair))
{
break;
}
Debug.Assert(pair.Code == 310);
lines.Add(pair.StringValue);
}
var section = new DxfThumbnailImageSection();
section.RawData = DxfCommonConverters.HexBytes(string.Join(string.Empty, lines));
return section;
}
return null;
}
