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Added TW_ENUMERATION to cap writer.

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This commit is contained in:
Eugene Wang
2018-11-25 07:06:48 -05:00
parent cc48fe73dd
commit 122a3354c4
1 changed files with 61 additions and 50 deletions
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111
src/NTwain/CapWriter.cs
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@@ -91,15 +91,15 @@ namespace NTwain
if (twCap.hContainer != IntPtr.Zero)
{
var listSz = value.Type.GetSize() * value.ItemList.Length;
TW_ARRAY arr = new TW_ARRAY
TW_ARRAY container = new TW_ARRAY
{
ItemType = (ushort)value.Type,
NumItems = (uint)value.ItemList.Length,
ItemList = config.MemoryManager.Allocate((uint)listSz)
};
if (arr.ItemList != IntPtr.Zero)
if (container.ItemList != IntPtr.Zero)
{
IntPtr baseAddr = config.MemoryManager.Lock(arr.ItemList);
IntPtr baseAddr = config.MemoryManager.Lock(container.ItemList);
try
{
int offset = 0;
@@ -110,14 +110,14 @@ namespace NTwain
}
finally
{
config.MemoryManager.Unlock(arr.ItemList);
config.MemoryManager.Unlock(container.ItemList);
}
}
try
{
IntPtr baseAddr = config.MemoryManager.Lock(twCap.hContainer);
Marshal.StructureToPtr(arr, baseAddr, false);
Marshal.StructureToPtr(container, baseAddr, false);
}
finally
{
@@ -127,24 +127,62 @@ namespace NTwain
return twCap;
}
///// <summary>
///// Generates a <see cref="TW_CAPABILITY"/> for use in capability negotiation
///// using TWAIN's enum value.
///// </summary>
///// <typeparam name="T"></typeparam>
///// <param name="cap"></param>
///// <param name="value"></param>
///// <returns></returns>
//public TW_CAPABILITY Generate<T>(CapabilityId cap, EnumValue<T> value)
//{
// var twCap = new TW_CAPABILITY
// {
// Capability = cap,
// ContainerType = ContainerType.Enum
// };
/// <summary>
/// Generates a <see cref="TW_CAPABILITY"/> for use in capability negotiation
/// using TWAIN's enum value.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="cap"></param>
/// <param name="value"></param>
/// <returns></returns>
public TW_CAPABILITY Generate<T>(CapabilityId cap, EnumValue<T> value)
{
var twCap = new TW_CAPABILITY
{
Capability = cap,
ContainerType = ContainerType.Enum,
hContainer = config.MemoryManager.Allocate((uint)Marshal.SizeOf(typeof(TW_ENUMERATION)))
};
if (twCap.hContainer != IntPtr.Zero)
{
var listSz = value.Type.GetSize() * value.ItemList.Length;
TW_ENUMERATION container = new TW_ENUMERATION
{
ItemType = (ushort)value.Type,
NumItems = (uint)value.ItemList.Length,
CurrentIndex = (uint)value.CurrentIndex,
DefaultIndex = (uint)value.DefaultIndex,
ItemList = config.MemoryManager.Allocate((uint)listSz)
};
if (container.ItemList != IntPtr.Zero)
{
IntPtr baseAddr = config.MemoryManager.Lock(container.ItemList);
try
{
int offset = 0;
foreach (var it in value.ItemList)
{
baseAddr.WriteValue(ref offset, value.Type, it);
}
}
finally
{
config.MemoryManager.Unlock(container.ItemList);
}
}
// return twCap;
//}
try
{
IntPtr baseAddr = config.MemoryManager.Lock(twCap.hContainer);
Marshal.StructureToPtr(container, baseAddr, false);
}
finally
{
config.MemoryManager.Unlock(twCap.hContainer);
}
}
return twCap;
}
///// <summary>
///// Generates a <see cref="TW_CAPABILITY"/> for use in capability negotiation
@@ -164,34 +202,7 @@ namespace NTwain
// return twCap;
//}
//void SetEnumValue(TW_ENUMERATION value, IMemoryManager memoryManager)
//{
// if (value == null) { throw new ArgumentNullException("value"); }
// ContainerType = ContainerType.Enum;
// Int32 valueSize = TW_ENUMERATION.ItemOffset + value.ItemList.Length * TypeExtensions.GetItemTypeSize(value.ItemType);
// int offset = 0;
// _hContainer = memoryManager.Allocate((uint)valueSize);
// if (_hContainer != IntPtr.Zero)
// {
// IntPtr baseAddr = memoryManager.Lock(_hContainer);
// // can't safely use StructureToPtr here so write it our own
// baseAddr.WriteValue(ref offset, ItemType.UInt16, value.ItemType);
// baseAddr.WriteValue(ref offset, ItemType.UInt32, (uint)value.ItemList.Length);
// baseAddr.WriteValue(ref offset, ItemType.UInt32, value.CurrentIndex);
// baseAddr.WriteValue(ref offset, ItemType.UInt32, value.DefaultIndex);
// foreach (var item in value.ItemList)
// {
// baseAddr.WriteValue(ref offset, value.ItemType, item);
// }
// memoryManager.Unlock(_hContainer);
// }
//}
//void SetRangeValue(TW_RANGE value, IMemoryManager memoryManager)
//{
// if (value == null) { throw new ArgumentNullException("value"); }