本文整理汇总了C#中PixelFormat.GetColorsLengths方法的典型用法代码示例。如果您正苦于以下问题：C# PixelFormat.GetColorsLengths方法的具体用法？C# PixelFormat.GetColorsLengths怎么用？C# PixelFormat.GetColorsLengths使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PixelFormat的用法示例。
在下文中一共展示了PixelFormat.GetColorsLengths方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: GenerateTo
/// <summary>
/// Generates expression converting and storing one pixel in output format to output buffer (ordering bytes accordingly to endianess) at given position using channels values provided by red/green/blue/alpha variables.
/// </summary>
/// <returns>Generated expression.</returns>
/// <param name="outputFormat">Pixel color format of pixels stored in output buffer.</param>
/// <param name="endianess">Endianess of output buffer.</param>
/// <param name="outBuffer">Output buffer.</param>
/// <param name="outPosition">Position of pixel in output buffer.</param>
/// <param name="redByte">Variable from which value of red channel should be read.</param>
/// <param name="greenByte">Variable from which value of green channel should be read.</param>
/// <param name="blueByte">Variable from which value of blue channel should be read.</param>
/// <param name="alphaByte">Variable from which value of alpha channel should be read.</param>
private static Expression GenerateTo(PixelFormat outputFormat, Endianess endianess, Expression outBuffer, Expression outPosition, Expression redByte, Expression greenByte, Expression blueByte, Expression alphaByte)
{
byte currentBit = 0;
byte currentByte = 0;
var expressions = new List<Expression>();
Expression currentExpression = null;
foreach(var colorDescriptor in outputFormat.GetColorsLengths())
{
Expression colorExpression = null;
switch(colorDescriptor.Key)
{
case ColorType.A:
colorExpression = alphaByte;
break;
case ColorType.B:
colorExpression = blueByte;
break;
case ColorType.G:
colorExpression = greenByte;
break;
case ColorType.R:
colorExpression = redByte;
break;
case ColorType.X:
colorExpression = Expression.Constant((uint)0xFF);
break;
}
foreach(var transformation in ByteSqueezeAndMove(colorDescriptor.Value, currentBit))
{
Expression currentExpressionFragment = colorExpression;
if(transformation.MaskBits != 0xFF)
{
currentExpressionFragment = Expression.And(currentExpressionFragment, Expression.Constant((uint)transformation.MaskBits));
}
if(transformation.ShiftBits > 0)
{
currentExpressionFragment = Expression.RightShift(currentExpressionFragment, Expression.Constant((int)transformation.ShiftBits));
}
else if(transformation.ShiftBits < 0)
{
currentExpressionFragment = Expression.And(
Expression.LeftShift(currentExpressionFragment, Expression.Constant((int)(-transformation.ShiftBits))),
Expression.Constant((uint)0xFF));
}
currentExpression = (currentExpression == null) ? currentExpressionFragment : Expression.Or(currentExpression, currentExpressionFragment);
currentBit += transformation.UsedBits;
while(currentBit >= 8)
{
expressions.Add(
Expression.Assign(
Expression.ArrayAccess(outBuffer,
Expression.Add(
outPosition,
Expression.Constant((endianess == Endianess.BigEndian) ? (int) currentByte : (outputFormat.GetColorDepth() - currentByte - 1)))),
Expression.Convert(currentExpression, typeof(byte))));
currentExpression = null;
currentBit -= 8;
currentByte++;
}
}
}
return Expression.Block(expressions);
}示例2: GenerateFrom
/// <summary>
/// Generates expression reading one pixel encoded in given format from input buffer (with bytes ordered accordingly to endianess) at given position
/// and storing each channel in separate variable expression.
/// </summary>
/// <returns>Generated expression.</returns>
/// <param name="inputFormat">Pixel color format of pixels in input buffer.</param>
/// <param name="endianess">Endianess of input buffer.</param>
/// <param name="inBuffer">Input buffer.</param>
/// <param name="inPosition">Position of pixel in buffer.</param>
/// <param name="redByte">Variable to which value of red channel should be stored.</param>
/// <param name="greenByte">Variable to which value of green channel should be stored.</param>
/// <param name="blueByte">Variable to which value of blue channel should be stored.</param>
/// <param name="alphaByte">Variable to which value of alpha channel should be stored.</param>
private static Expression GenerateFrom(PixelFormat inputFormat, Endianess endianess, Expression inBuffer, Expression inPosition, Expression redByte, Expression greenByte, Expression blueByte, Expression alphaByte)
{
byte currentBit = 0;
byte currentByte = 0;
bool isAlphaSet = false;
var expressions = new List<Expression>();
var inputBytes = new ParameterExpression[inputFormat.GetColorDepth()];
for(int i = 0; i < inputBytes.Length; i++)
{
inputBytes[i] = Expression.Variable(typeof(uint));
expressions.Add(
Expression.Assign(
inputBytes[i],
Expression.Convert(
Expression.ArrayIndex(
inBuffer,
Expression.Add(
inPosition,
Expression.Constant((endianess == Endianess.BigEndian) ? i : inputBytes.Length - i - 1))),
typeof(uint))));
}
foreach(var colorDescriptor in inputFormat.GetColorsLengths())
{
Expression colorExpression = null;
foreach(var transformation in ByteInflate(colorDescriptor.Value, currentBit))
{
Expression currentExpressionFragment = inputBytes[currentByte];
if(transformation.MaskBits != 0xFF)
{
currentExpressionFragment = Expression.And(currentExpressionFragment, Expression.Constant((uint)transformation.MaskBits));
}
if(transformation.ShiftBits > 0)
{
currentExpressionFragment = Expression.RightShift(currentExpressionFragment, Expression.Constant((int)transformation.ShiftBits));
}
else if(transformation.ShiftBits < 0)
{
currentExpressionFragment = Expression.And(
Expression.LeftShift(currentExpressionFragment, Expression.Constant((int)(-transformation.ShiftBits))),
Expression.Constant((uint)0xFF));
}
currentBit += transformation.UsedBits;
if(currentBit >= 8)
{
currentBit -= 8;
currentByte++;
}
colorExpression = (colorExpression == null) ? currentExpressionFragment : Expression.Or(colorExpression, currentExpressionFragment);
}
if(colorDescriptor.Key == ColorType.X)
{
continue;
}
Expression currentColor = null;
switch(colorDescriptor.Key)
{
case ColorType.A:
currentColor = alphaByte;
isAlphaSet = true;
break;
case ColorType.B:
currentColor = blueByte;
break;
case ColorType.G:
currentColor = greenByte;
break;
case ColorType.R:
currentColor = redByte;
break;
}
expressions.Add(Expression.Assign(currentColor, colorExpression));
// filling lsb '0'-bits with copy of msb pattern
var numberOfBits = colorDescriptor.Value;
var zeroBits = 8 - numberOfBits;
while(zeroBits > 0)
//.........这里部分代码省略.........