Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 163 insertions, 0 deletions

diff --git a/kdvi/TeXFont_TFM.cpp b/kdvi/TeXFont_TFM.cpp
new file mode 100644
index 00000000..54edd2fc
--- /dev/null
+++ b/kdvi/TeXFont_TFM.cpp
@@ -0,0 +1,163 @@
+// TeXFont_TFM.cpp
+//
+// Part of KDVI - A DVI previewer for the KDE desktop environemt 
+//
+// (C) 2003 Stefan Kebekus
+// Distributed under the GPL
+
+// Add header files alphabetically
+
+#include <config.h>
+
+#include <kdebug.h>
+#include <klocale.h>
+#include <qdatastream.h>
+#include <qfile.h>
+
+#include "glyph.h"
+#include "TeXFont_TFM.h"
+#include "TeXFontDefinition.h"
+
+//#define DEBUG_TFM
+
+
+TeXFont_TFM::TeXFont_TFM(TeXFontDefinition *parent) 
+  : TeXFont(parent)
+{
+#ifdef DEBUG_TFM
+  kdDebug(4300) << "TeXFont_TFM::TeXFont_TFM( parent=" << parent << " )" << endl;
+#endif
+
+  QFile file( parent->filename );
+  if ( !file.open( IO_ReadOnly ) ) {
+    kdError(4300) << "TeXFont_TFM::TeXFont_TFM(): Could not read TFM file" << endl;
+    return;
+  }
+  QDataStream stream( &file );
+
+  // Data from the very beginning of the TFM file, as specified in
+  // "The DVI Driver Standard, Level 0", section D.2.1
+  Q_UINT16 lf, lh, bc, ec, nw, nh, nd;
+  stream >> lf >> lh >> bc >> ec >> nw >> nh >> nd;
+#ifdef DEBUG_TFM
+  kdDebug(4300) << "lf= " << lf << endl
+		<< "lh= " << lh << endl
+		<< "bc= " << bc << endl
+		<< "ec= " << ec << endl
+		<< "nw= " << nw << endl
+		<< "nh= " << nh << endl
+		<< "nd= " << nd << endl;
+#endif
+  if ((bc > ec) || (ec >= TeXFontDefinition::max_num_of_chars_in_font)) {
+    kdError(4300) << "TeXFont_TFM::TeXFont_TFM( filename=" << parent->filename << " ): The font has an invalid bc and ec entries." << endl;
+    file.close();
+    return;
+  }
+
+  // Data from the HEADER section of the TFM data.
+  file.at(24);
+  stream >> checksum >> design_size_in_TeX_points.value;
+#ifdef DEBUG_TFM
+  kdDebug(4300) << "checksum    = " << checksum << endl
+		<< "design_size = " << design_size_in_TeX_points.toDouble() << " TeX Points" << endl
+		<< "            = " << design_size_in_TeX_points.toDouble()*254.0/7227.0 << " cm" << endl;
+#endif
+
+  // Width table
+  fix_word widthTable_in_units_of_design_size[TeXFontDefinition::max_num_of_chars_in_font];
+  for(unsigned int i=0; i<TeXFontDefinition::max_num_of_chars_in_font; i++) 
+    widthTable_in_units_of_design_size[i].value = 0;
+
+  file.at( 24 + 4*lh + 4*(ec-bc) );
+  for(unsigned int i=0; i<nw; i++) {
+
+    stream >> widthTable_in_units_of_design_size[i].value;
+    // Some characters, which are used as parts of glyphs, have width
+    // 0 --the real width is caculated in a lig_kern program and
+    // depends on the preceding character. We cannot calculate the
+    // real width here and take 0.4 times the design size as an
+    // approximation.
+    if (widthTable_in_units_of_design_size[i].value == 0)
+      widthTable_in_units_of_design_size[i].fromDouble(0.4);
+  }
+  
+  // Height table
+  fix_word heightTable_in_units_of_design_size[16];
+  for(unsigned int i=0; i<16; i++) 
+    heightTable_in_units_of_design_size[i].value = 0;
+  for(unsigned int i=0; i<nh; i++) {
+    stream >> heightTable_in_units_of_design_size[i].value;
+  }
+  
+  // Char-Info table
+  file.at( 24 + 4*lh );
+  for(unsigned int characterCode=bc; characterCode<ec; characterCode++) {
+    glyph *g = glyphtable+characterCode;
+    
+    Q_UINT8 byte;
+    stream >> byte;
+    if (byte >= nw) 
+      kdError(4300) << "TeXFont_TFM::TeXFont_TFM( filename=" << parent->filename << " ): The font has an invalid Char-Info table." << endl;
+    else {
+      characterWidth_in_units_of_design_size[characterCode] = widthTable_in_units_of_design_size[byte];
+      g->dvi_advance_in_units_of_design_size_by_2e20 = widthTable_in_units_of_design_size[byte].value;
+    }
+    
+    stream >> byte;
+    byte = byte >> 4;
+    if (byte >= nh)
+      kdError(4300) << "TeXFont_TFM::TeXFont_TFM( filename=" << parent->filename << " ): The font has an invalid Char-Info table." << endl;
+    else 
+      characterHeight_in_units_of_design_size[characterCode] = heightTable_in_units_of_design_size[byte];
+    
+    stream >> byte;
+    stream >> byte;
+  }
+  file.close();
+}
+
+
+TeXFont_TFM::~TeXFont_TFM()
+{
+}
+
+
+glyph *TeXFont_TFM::getGlyph(Q_UINT16 characterCode, bool generateCharacterPixmap, const QColor& color)
+{
+#ifdef DEBUG_TFM
+  kdDebug(4300) << "TeXFont_TFM::getGlyph( ch=" << ch << ", generateCharacterPixmap=" << generateCharacterPixmap << " )" << endl;
+#endif
+
+  // Paranoia checks
+  if (characterCode >= TeXFontDefinition::max_num_of_chars_in_font) {
+    kdError(4300) << "TeXFont_TFM::getGlyph(): Argument is too big." << endl;
+    return glyphtable;
+  }
+  
+  // This is the address of the glyph that will be returned.
+  struct glyph *g = glyphtable+characterCode;
+  
+  if ((generateCharacterPixmap == true) && ((g->shrunkenCharacter.isNull()) || (color != g->color)) ) {
+    g->color = color;
+    Q_UINT16 pixelWidth = (Q_UINT16)(parent->displayResolution_in_dpi *
+				     design_size_in_TeX_points.toDouble() *
+				     characterWidth_in_units_of_design_size[characterCode].toDouble() * 100.0/7227.0 + 0.5);
+    Q_UINT16 pixelHeight = (Q_UINT16)(parent->displayResolution_in_dpi *
+				      design_size_in_TeX_points.toDouble() *
+				      characterHeight_in_units_of_design_size[characterCode].toDouble() * 100.0/7227.0 + 0.5);
+    
+    // Just make sure that weired TFM files never lead to giant
+    // pixmaps that eat all system memory...
+    if (pixelWidth > 50)
+      pixelWidth = 50;
+    if (pixelHeight > 50)
+      pixelHeight = 50;
+    
+    g->shrunkenCharacter.resize( pixelWidth, pixelHeight );
+    g->shrunkenCharacter.fill(color);
+    g->x2 = 0;
+    g->y2 = pixelHeight;
+  }
+  
+  return g;
+}