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Make texts search-able in PDF files (using invisible texts behind stroked texts)

pull/7/merge
jean-pierre charras 8 years ago
parent
9447181a08
commit
0999b5cb77
3 changed files with 66 additions and 56 deletions
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  1. 109
      common/common_plotPDF_functions.cpp
  2. 12
      common/common_plotPS_functions.cpp
  3. 1
      include/plot_common.h

109
common/common_plotPDF_functions.cpp
View File

@ -775,66 +775,67 @@ void PDF_PLOTTER::Text( const wxPoint& aPos,
aMultilineAllowed = false; // the text has only one line.
// Emit native PDF text (if requested)
// Currently: does not work: disable it
bool use_native = false; // = m_textMode != PLOTTEXTMODE_STROKE && !aMultilineAllowed;
if( use_native )
// Currently: is not supported, because only our stroke font is alloxed: disable it
// However, shadowed texts (searchable texts) works reasonably well because
// pixel accurate precision is not requested, so we add searchable texts
// behind our stroked font texts
bool use_native_font = false;
// render_mode 0 shows the text, render_mode 3 is invisible
int render_mode = use_native_font ? 0 : 3;
const char *fontname = aItalic ? (aBold ? "/KicadFontBI" : "/KicadFontI")
: (aBold ? "/KicadFontB" : "/KicadFont");
// Compute the copious tranformation parameters of the Curent Transform Matrix
double ctm_a, ctm_b, ctm_c, ctm_d, ctm_e, ctm_f;
double wideningFactor, heightFactor;
computeTextParameters( aPos, aText, aOrient, aSize, m_plotMirror, aH_justify,
aV_justify, aWidth, aItalic, aBold,
&wideningFactor, &ctm_a, &ctm_b, &ctm_c,
&ctm_d, &ctm_e, &ctm_f, &heightFactor );
SetColor( aColor );
SetCurrentLineWidth( aWidth, aData );
/* We use the full CTM instead of the text matrix because the same
coordinate system will be used for the overlining. Also the %f
for the trig part of the matrix to avoid %g going in exponential
format (which is not supported)
render_mode 0 shows the text, render_mode 3 is invisible */
fprintf( workFile, "q %f %f %f %f %g %g cm BT %s %g Tf %d Tr %g Tz ",
ctm_a, ctm_b, ctm_c, ctm_d, ctm_e, ctm_f,
fontname, heightFactor, render_mode,
wideningFactor * 100 );
// The text must be escaped correctly
fputsPostscriptString( workFile, aText );
fputs( " Tj ET\n", workFile );
// We are in text coordinates, plot the overbars, if we're not doing phantom text
if( use_native_font )
{
const char *fontname = aItalic ? (aBold ? "/KicadFontBI" : "/KicadFontI")
: (aBold ? "/KicadFontB" : "/KicadFont");
// Compute the copious tranformation parameters
double ctm_a, ctm_b, ctm_c, ctm_d, ctm_e, ctm_f;
double wideningFactor, heightFactor;
computeTextParameters( aPos, aText, aOrient, aSize, aH_justify,
aV_justify, aWidth, aItalic, aBold,
&wideningFactor, &ctm_a, &ctm_b, &ctm_c,
&ctm_d, &ctm_e, &ctm_f, &heightFactor );
SetColor( aColor );
SetCurrentLineWidth( aWidth, aData );
/* We use the full CTM instead of the text matrix because the same
coordinate system will be used for the overlining. Also the %f
for the trig part of the matrix to avoid %g going in exponential
format (which is not supported)
Rendermode 0 shows the text, rendermode 3 is invisible */
fprintf( workFile, "q %f %f %f %f %g %g cm BT %s %g Tf %d Tr %g Tz ",
ctm_a, ctm_b, ctm_c, ctm_d, ctm_e, ctm_f,
fontname, heightFactor,
(m_textMode == PLOTTEXTMODE_NATIVE) ? 0 : 3,
wideningFactor * 100 );
// The text must be escaped correctly
fputsPostscriptString( workFile, aText );
fputs( " Tj ET\n", workFile );
/* We are still in text coordinates, plot the overbars (if we're
* not doing phantom text) */
if( m_textMode == PLOTTEXTMODE_NATIVE )
std::vector<int> pos_pairs;
postscriptOverlinePositions( aText, aSize.x, aItalic, aBold, &pos_pairs );
int overbar_y = KiROUND( aSize.y * 1.1 );
for( unsigned i = 0; i < pos_pairs.size(); i += 2)
{
std::vector<int> pos_pairs;
postscriptOverlinePositions( aText, aSize.x, aItalic, aBold, &pos_pairs );
int overbar_y = KiROUND( aSize.y * 1.1 );
for( unsigned i = 0; i < pos_pairs.size(); i += 2)
{
/* This is a nontrivial situation: we are *not* in the user
coordinate system, so the userToDeviceCoordinates function
can't be used! Strange as it may seem, the userToDeviceSize
is the right function to use here... */
DPOINT dev_from = userToDeviceSize( wxSize( pos_pairs[i], overbar_y ) );
DPOINT dev_to = userToDeviceSize( wxSize( pos_pairs[i + 1], overbar_y ) );
fprintf( workFile, "%g %g m %g %g l ",
dev_from.x, dev_from.y, dev_to.x, dev_to.y );
}
/* This is a nontrivial situation: we are *not* in the user
coordinate system, so the userToDeviceCoordinates function
can't be used! Strange as it may seem, the userToDeviceSize
is the right function to use here... */
DPOINT dev_from = userToDeviceSize( wxSize( pos_pairs[i], overbar_y ) );
DPOINT dev_to = userToDeviceSize( wxSize( pos_pairs[i + 1], overbar_y ) );
fprintf( workFile, "%g %g m %g %g l ",
dev_from.x, dev_from.y, dev_to.x, dev_to.y );
}
// Stroke and restore the CTM
fputs( "S Q\n", workFile );
}
// Stroke and restore the CTM
fputs( "S Q\n", workFile );
// Plot the stroked text (if requested)
if( !use_native )
if( !use_native_font )
{
PLOTTER::Text( aPos, aColor, aText, aOrient, aSize, aH_justify, aV_justify,
aWidth, aItalic, aBold, aMultilineAllowed );

12
common/common_plotPS_functions.cpp
View File

@ -427,6 +427,7 @@ void PSLIKE_PLOTTER::computeTextParameters( const wxPoint& aPos,
const wxString& aText,
int aOrient,
const wxSize& aSize,
bool aMirror,
enum EDA_TEXT_HJUSTIFY_T aH_justify,
enum EDA_TEXT_VJUSTIFY_T aV_justify,
int aWidth,
@ -487,7 +488,14 @@ void PSLIKE_PLOTTER::computeTextParameters( const wxPoint& aPos,
DPOINT sz_dev = userToDeviceSize( aSize );
// Now returns the final values... the widening factor
*wideningFactor = sz_dev.y / sz_dev.x;
*wideningFactor = sz_dev.x / sz_dev.y;
// Mirrored texts must be plotted as mirrored!
if( m_plotMirror )
{
*wideningFactor = -*wideningFactor;
aOrient = -aOrient;
}
// The CTM transformation matrix
double alpha = DECIDEG2RAD( aOrient );
@ -953,7 +961,7 @@ void PS_PLOTTER::Text( const wxPoint& aPos,
// Compute the copious tranformation parameters
double ctm_a, ctm_b, ctm_c, ctm_d, ctm_e, ctm_f;
double wideningFactor, heightFactor;
computeTextParameters( aPos, aText, aOrient, aSize, aH_justify,
computeTextParameters( aPos, aText, aOrient, aSize, m_plotMirror, aH_justify,
aV_justify, aWidth, aItalic, aBold,
&wideningFactor, &ctm_a, &ctm_b, &ctm_c,
&ctm_d, &ctm_e, &ctm_f, &heightFactor );

1
include/plot_common.h
View File

@ -692,6 +692,7 @@ protected:
const wxString& aText,
int aOrient,
const wxSize& aSize,
bool aMirror,
enum EDA_TEXT_HJUSTIFY_T aH_justify,
enum EDA_TEXT_VJUSTIFY_T aV_justify,
int aWidth,

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