public Capability(Capabilities capability, TwainType twainType, Identity applicationId, Identity sourceId)
{
_capability = capability;
_applicationId = applicationId;
_sourceId = sourceId;
_twainType = twainType;
}
public static int SetBasicCapability(Capabilities capability, int rawValue, TwainType twainType, Identity applicationId, Identity sourceId)
{
var c = new Capability(capability, twainType, applicationId, sourceId);
var basicValue = c.GetBasicValue();
// Check that the device supports the capability
if (basicValue.ConditionCode != ConditionCode.Success)
{
throw new TwainException(string.Format("Unsupported capability {0}", capability), basicValue.ErrorCode, basicValue.ConditionCode);
}
if (basicValue.RawBasicValue == rawValue)
{
// Value is already set
return(rawValue);
}
// TODO: Check the set of Available Values that are supported by the Source for that
// capability.
//if (value in set of available values)
//{
c.SetValue(rawValue);
//}
// Verify that the new values have been accepted by the Source.
basicValue = c.GetBasicValue();
// Check that the device supports the capability
if (basicValue.ConditionCode != ConditionCode.Success)
{
throw new TwainException(string.Format("Unexpected failure verifying capability {0}", capability), basicValue.ErrorCode, basicValue.ConditionCode);
}
return(basicValue.RawBasicValue);
}
/// <summary>
/// Reads a TWAIN value.
/// </summary>
/// <param name="baseAddress">The base address.</param>
/// <param name="offset">The offset.</param>
/// <param name="type">The TWAIN type.</param>
/// <returns></returns>
public static object ReadValue(IntPtr baseAddress, ref int offset, TwainType type)
{
object val = null;
switch (type)
{
case TwainType.Int8:
val = (sbyte)Marshal.ReadByte(baseAddress, offset);
break;
case TwainType.UInt8:
val = Marshal.ReadByte(baseAddress, offset);
break;
case TwainType.Bool:
case TwainType.UInt16:
val = (ushort)Marshal.ReadInt16(baseAddress, offset);
break;
case TwainType.Int16:
val = Marshal.ReadInt16(baseAddress, offset);
break;
case TwainType.UInt32:
val = (uint)Marshal.ReadInt32(baseAddress, offset);
break;
case TwainType.Int32:
val = Marshal.ReadInt32(baseAddress, offset);
break;
case TwainType.Fix32:
Fix32 f32 = new Fix32();
f32.Whole = Marshal.ReadInt16(baseAddress, offset);
f32.Frac = (ushort)Marshal.ReadInt16(baseAddress, offset + 2);
val = f32;
break;
case TwainType.Frame:
Frame frame = new Frame();
frame.Left = (Fix32)ReadValue(baseAddress, ref offset, TwainType.Fix32);
frame.Top = (Fix32)ReadValue(baseAddress, ref offset, TwainType.Fix32);
frame.Right = (Fix32)ReadValue(baseAddress, ref offset, TwainType.Fix32);
frame.Bottom = (Fix32)ReadValue(baseAddress, ref offset, TwainType.Fix32);
return(frame); // no need to update offset again after reading fix32
case TwainType.Str128:
case TwainType.Str255:
case TwainType.Str32:
case TwainType.Str64:
val = Marshal.PtrToStringAnsi(new IntPtr(baseAddress.ToInt64() + offset));
break;
/* case TwainType.Handle:
* val = Marshal.ReadIntPtr(baseAddress, offset);
* break;*/
}
offset += GetItemTypeSize(type);
return(val);
}
/// <summary>
/// Gets the byte size of the item type.
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static int GetItemTypeSize(TwainType type)
{
if (__sizes.ContainsKey(type))
{
return(__sizes[type]);
}
return(0);
}
/// <summary>
/// Gets the byte size of the item type.
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static int GetItemTypeSize(TwainType type)
{
if (__sizes.ContainsKey(type))
{
return __sizes[type];
}
return 0;
}
/// <summary>
/// Reads a TWAIN value.
/// </summary>
/// <param name="baseAddress">The base address.</param>
/// <param name="offset">The offset.</param>
/// <param name="type">The TWAIN type.</param>
/// <returns></returns>
public static object ReadValue(IntPtr baseAddress, ref int offset, TwainType type)
{
object val = null;
switch (type)
{
case TwainType.Int8:
val = (sbyte)Marshal.ReadByte(baseAddress, offset);
break;
case TwainType.UInt8:
val = Marshal.ReadByte(baseAddress, offset);
break;
case TwainType.Bool:
case TwainType.UInt16:
val = (ushort)Marshal.ReadInt16(baseAddress, offset);
break;
case TwainType.Int16:
val = Marshal.ReadInt16(baseAddress, offset);
break;
case TwainType.UInt32:
val = (uint)Marshal.ReadInt32(baseAddress, offset);
break;
case TwainType.Int32:
val = Marshal.ReadInt32(baseAddress, offset);
break;
case TwainType.Fix32:
Fix32 f32 = new Fix32();
f32.Whole = Marshal.ReadInt16(baseAddress, offset);
f32.Frac = (ushort)Marshal.ReadInt16(baseAddress, offset + 2);
val = f32;
break;
case TwainType.Frame:
Frame frame = new Frame();
frame.Left = (Fix32)ReadValue(baseAddress, ref offset, TwainType.Fix32);
frame.Top = (Fix32)ReadValue(baseAddress, ref offset, TwainType.Fix32);
frame.Right = (Fix32)ReadValue(baseAddress, ref offset, TwainType.Fix32);
frame.Bottom = (Fix32)ReadValue(baseAddress, ref offset, TwainType.Fix32);
return frame; // no need to update offset again after reading fix32
case TwainType.Str128:
case TwainType.Str255:
case TwainType.Str32:
case TwainType.Str64:
val = Marshal.PtrToStringAnsi(new IntPtr(baseAddress.ToInt64() + offset));
break;
/* case TwainType.Handle:
val = Marshal.ReadIntPtr(baseAddress, offset);
break;*/
}
offset += GetItemTypeSize(type);
return val;
}
public CapabilityOneValue(TwainType twainType, int value)
{
Value = value;
TwainType = twainType;
}
public CapabilityOneValue(TwainType twainType, int value)
{
Value = value;
TwainType = twainType;
}
