public void ShowText(IInputBytes bytes)
{
var currentState = GetCurrentState();
var font = currentState.FontState.FromExtendedGraphicsState ? activeExtendedGraphicsStateFont : resourceStore.GetFont(currentState.FontState.FontName);
if (font == null)
{
throw new InvalidOperationException($"Could not find the font with name {currentState.FontState.FontName} in the resource store. It has not been loaded yet.");
}
var fontSize = currentState.FontState.FontSize;
var horizontalScaling = currentState.FontState.HorizontalScaling / 100m;
var characterSpacing = currentState.FontState.CharacterSpacing;
var rise = currentState.FontState.Rise;
var transformationMatrix = currentState.CurrentTransformationMatrix;
var renderingMatrix =
TransformationMatrix.FromValues(fontSize * horizontalScaling, 0, 0, fontSize, 0, rise);
// TODO: this does not seem correct, produces the correct result for now but we need to revisit.
// see: https://stackoverflow.com/questions/48010235/pdf-specification-get-font-size-in-points
var pointSize = decimal.Round(rotation.Rotate(transformationMatrix).Multiply(TextMatrices.TextMatrix).Multiply(fontSize).A, 2);
while (bytes.MoveNext())
{
var code = font.ReadCharacterCode(bytes, out int codeLength);
var foundUnicode = font.TryGetUnicode(code, out var unicode);
if (!foundUnicode || unicode == null)
{
log.Warn($"We could not find the corresponding character with code {code} in font {font.Name}.");
// Try casting directly to string as in PDFBox 1.8.
unicode = new string((char)code, 1);
}
var wordSpacing = 0m;
if (code == ' ' && codeLength == 1)
{
wordSpacing += GetCurrentState().FontState.WordSpacing;
}
var textMatrix = TextMatrices.TextMatrix;
if (font.IsVertical)
{
if (!(font is IVerticalWritingSupported verticalFont))
{
throw new InvalidOperationException($"Font {font.Name} was in vertical writing mode but did not implement {nameof(IVerticalWritingSupported)}.");
}
var positionVector = verticalFont.GetPositionVector(code);
textMatrix = textMatrix.Translate(positionVector.X, positionVector.Y);
}
var boundingBox = font.GetBoundingBox(code);
var transformedGlyphBounds = rotation.Rotate(transformationMatrix)
.Transform(textMatrix
.Transform(renderingMatrix
.Transform(boundingBox.GlyphBounds)));
var transformedPdfBounds = rotation.Rotate(transformationMatrix)
.Transform(textMatrix
.Transform(renderingMatrix
.Transform(new PdfRectangle(0, 0, boundingBox.Width, 0))));
// If the text rendering mode calls for filling, the current nonstroking color in the graphics state is used;
// if it calls for stroking, the current stroking color is used.
// In modes that perform both filling and stroking, the effect is as if each glyph outline were filled and then stroked in separate operations.
// TODO: expose color as something more advanced
var color = currentState.FontState.TextRenderingMode != TextRenderingMode.Stroke
? currentState.CurrentNonStrokingColor
: currentState.CurrentStrokingColor;
ShowGlyph(font, transformedGlyphBounds,
transformedPdfBounds.BottomLeft,
transformedPdfBounds.BottomRight,
transformedPdfBounds.Width,
unicode,
fontSize,
color,
pointSize,
textSequence);
decimal tx, ty;
if (font.IsVertical)
{
var verticalFont = (IVerticalWritingSupported)font;
var displacement = verticalFont.GetDisplacementVector(code);
tx = 0;
ty = (displacement.Y * fontSize) + characterSpacing + wordSpacing;
}
else
{
tx = (boundingBox.Width * fontSize + characterSpacing + wordSpacing) * horizontalScaling;
ty = 0;
}
TextMatrices.TextMatrix = TextMatrices.TextMatrix.Translate(tx, ty);
}
}
public void ShowText(IInputBytes bytes)
{
var currentState = GetCurrentState();
var font = currentState.FontState.FromExtendedGraphicsState ? activeExtendedGraphicsStateFont : resourceStore.GetFont(currentState.FontState.FontName);
if (font == null)
{
throw new InvalidOperationException($"Could not find the font with name {currentState.FontState.FontName} in the resource store. It has not been loaded yet.");
}
var fontSize = currentState.FontState.FontSize;
var horizontalScaling = currentState.FontState.HorizontalScaling / 100m;
var characterSpacing = currentState.FontState.CharacterSpacing;
var rise = currentState.FontState.Rise;
var transformationMatrix = currentState.CurrentTransformationMatrix;
var renderingMatrix =
TransformationMatrix.FromValues(fontSize * horizontalScaling, 0, 0, fontSize, 0, rise);
// TODO: this does not seem correct, produces the correct result for now but we need to revisit.
// see: https://stackoverflow.com/questions/48010235/pdf-specification-get-font-size-in-points
var pointSize = decimal.Round(rotation.Rotate(transformationMatrix).Multiply(TextMatrices.TextMatrix).Multiply(fontSize).A, 2);
while (bytes.MoveNext())
{
var code = font.ReadCharacterCode(bytes, out int codeLength);
var foundUnicode = font.TryGetUnicode(code, out var unicode);
if (!foundUnicode || unicode == null)
{
log.Warn($"We could not find the corresponding character with code {code} in font {font.Name}.");
// Try casting directly to string as in PDFBox 1.8.
unicode = new string((char)code, 1);
}
var wordSpacing = 0m;
if (code == ' ' && codeLength == 1)
{
wordSpacing += GetCurrentState().FontState.WordSpacing;
}
if (font.IsVertical)
{
throw new NotImplementedException("Vertical fonts are currently unsupported, please submit a pull request or issue with an example file.");
}
var boundingBox = font.GetBoundingBox(code);
var transformedGlyphBounds = rotation.Rotate(transformationMatrix)
.Transform(TextMatrices.TextMatrix
.Transform(renderingMatrix
.Transform(boundingBox.GlyphBounds)));
var transformedPdfBounds = rotation.Rotate(transformationMatrix)
.Transform(TextMatrices.TextMatrix
.Transform(renderingMatrix.Transform(new PdfRectangle(0, 0, boundingBox.Width, 0))));
ShowGlyph(font, transformedGlyphBounds, transformedPdfBounds.BottomLeft, transformedPdfBounds.BottomRight, transformedPdfBounds.Width, unicode, fontSize, pointSize);
decimal tx, ty;
if (font.IsVertical)
{
tx = 0;
ty = boundingBox.GlyphBounds.Height * fontSize + characterSpacing + wordSpacing;
}
else
{
tx = (boundingBox.Width * fontSize + characterSpacing + wordSpacing) * horizontalScaling;
ty = 0;
}
var translate = TransformationMatrix.GetTranslationMatrix(tx, ty);
TextMatrices.TextMatrix = translate.Multiply(TextMatrices.TextMatrix);
}
}