VAR/VAR.PdfTools
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FrmPdfInfo: Improve rendering, making more accurate the location of the glyphs.

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This commit is contained in:
Valeriano A.R.
2017-06-26 01:49:48 +02:00
parent 52841de51b
commit 15fbec2470
1 changed files with 84 additions and 41 deletions
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117
VAR.PdfTools.Workbench/FrmPdfInfo.cs
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@@ -1,6 +1,7 @@
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
@@ -92,7 +93,7 @@ namespace VAR.PdfTools.Workbench
{
lines.Add(string.Format("Text({0}, {1})({2}, {3})[{4}]: \"{5}\"",
textElement.Matrix.Matrix[0, 2], textElement.Matrix.Matrix[1, 2], textElement.VisibleWidth, textElement.VisibleHeight,
textElement.Font == null ? string.Empty : textElement.Font.Name,
textElement.Font == null ? "#NULL#" : textElement.Font.Name,
textElement.VisibleText));
}
}
@@ -166,7 +167,7 @@ namespace VAR.PdfTools.Workbench
return;
}
const int Scale = 10;
const int Scale = 5;
PdfDocument doc = PdfDocument.Load(txtPdfPath.Text);
string baseDocumentPath = Path.GetDirectoryName(txtPdfPath.Text);
@@ -203,37 +204,29 @@ namespace VAR.PdfTools.Workbench
// Prepare page image
int pageWidth = (int)Math.Ceiling(pageXMax - pageXMin);
int pageHeight = (int)Math.Ceiling(pageYMax - pageYMin);
Bitmap bmp = CreatePageBitmap(pageWidth, pageHeight, Scale);
Graphics gc = Graphics.FromImage(bmp);
gc.Clear(Color.White);
Pen penTextElem = new Pen(Color.Blue);
Pen penTextElem2 = new Pen(Color.Red);
// Draw text elements
foreach (PdfTextElement textElement in extractor.Elements)
using (Bitmap bmp = new Bitmap(pageWidth * Scale, pageHeight * Scale, PixelFormat.Format32bppArgb))
using (Graphics gc = Graphics.FromImage(bmp))
using (Pen penTextElem = new Pen(Color.Blue))
{
DrawTextElement(textElement, gc, penTextElem, penTextElem2, Scale, pageHeight, pageXMin, pageYMin);
gc.Clear(Color.White);
// Draw text elements
foreach (PdfTextElement textElement in extractor.Elements)
{
DrawTextElement(textElement, gc, penTextElem, Scale, pageHeight, pageXMin, pageYMin);
}
// Save image to disk
string fileName = Path.Combine(baseDocumentPath, string.Format("{0}_{1:0000}.png", baseDocumentFilename, pageNumber));
bmp.Save(fileName, ImageFormat.Png);
}
// Save image to disk
string fileName = Path.Combine(baseDocumentPath, string.Format("{0}_{1:0000}.png", baseDocumentFilename, pageNumber));
bmp.Save(fileName, ImageFormat.Png);
pageNumber++;
}
txtOutput.Lines = lines.ToArray();
}
private static Bitmap CreatePageBitmap(int pageWidth, int pageHeight, int Scale)
{
return new Bitmap(
pageWidth * Scale,
pageHeight * Scale,
PixelFormat.Format32bppArgb);
}
private static void DrawTextElement(PdfTextElement textElement, Graphics gc, Pen penTextElem, Pen penTextElem2, int Scale, int pageHeight, double pageXMin, double pageYMin)
private static void DrawTextElement(PdfTextElement textElement, Graphics gc, Pen penTextElem, int Scale, int pageHeight, double pageXMin, double pageYMin)
{
double textElementX = textElement.GetX() - pageXMin;
double textElementY = textElement.GetY() - pageYMin;
@@ -244,21 +237,71 @@ namespace VAR.PdfTools.Workbench
double textElementPageX = textElementX;
double textElementPageY = pageHeight - textElementY;
gc.DrawRectangle(penTextElem,
DrawRoundedRectangle(gc, penTextElem,
(int)(textElementPageX * Scale),
(int)(textElementPageY * Scale),
(int)(textElementWidth * Scale),
(int)(textElementHeight * Scale));
gc.DrawRectangle(penTextElem2,
(int)((textElementPageX - 1) * Scale),
(int)((textElementPageY - 1) * Scale),
(int)((textElementWidth + 2) * Scale),
(int)((textElementHeight + 2) * Scale));
gc.DrawString(textElementText,
new Font("Tahoma", (int)textElementHeight * Scale, GraphicsUnit.Pixel),
Brushes.Black,
(int)(textElementPageX * Scale),
(int)(textElementPageY * Scale));
(int)(textElementHeight * Scale),
Scale);
if (textElementHeight > 0.000)
{
using (Font font = new Font("Arial", (int)(textElementHeight * Scale), GraphicsUnit.Pixel))
{
foreach (PdfCharElement c in textElement.Characters)
{
gc.DrawString(c.Char,
font,
Brushes.Black,
(int)((textElementPageX + c.Displacement) * Scale),
(int)(textElementPageY * Scale));
gc.FillRectangle(Brushes.Red,
(int)((textElementPageX + c.Displacement) * Scale),
(int)(textElementPageY * Scale),
2, 2);
}
}
}
}
public static GraphicsPath RoundedRect(int x, int y, int width, int height, int radius)
{
int diameter = radius * 2;
Size size = new Size(diameter, diameter);
Rectangle arc = new Rectangle(x, y, diameter, diameter);
GraphicsPath path = new GraphicsPath();
// top left arc
path.AddArc(arc, 180, 90);
// top right arc
arc.X = (x + width) - diameter;
path.AddArc(arc, 270, 90);
// bottom right arc
arc.Y = (y + height) - diameter;
path.AddArc(arc, 0, 90);
// bottom left arc
arc.X = x;
path.AddArc(arc, 90, 90);
path.CloseFigure();
return path;
}
public static void DrawRoundedRectangle(Graphics graphics, Pen pen, int x, int y, int width, int height, int cornerRadius)
{
if (graphics == null)
throw new ArgumentNullException("graphics");
if (pen == null)
throw new ArgumentNullException("pen");
using (GraphicsPath path = RoundedRect(x, y, width, height, cornerRadius))
{
graphics.DrawPath(pen, path);
}
}
}