From 09203f61a483762c16f649e797e2439337e8939b Mon Sep 17 00:00:00 2001
From: Lu Wang <coolwanglu@gmail.com>
Date: Sat, 21 Sep 2013 13:56:57 +0800
Subject: [PATCH] new option --process-type3

---
 pdf2htmlEX.1.in          |  7 +++++++
 src/HTMLRenderer/font.cc | 11 ++++++-----
 src/pdf2htmlEX.cc        | 10 ++++++++--
 3 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/pdf2htmlEX.1.in b/pdf2htmlEX.1.in
index c1e8de7..830b209 100644
--- a/pdf2htmlEX.1.in
+++ b/pdf2htmlEX.1.in
@@ -184,6 +184,13 @@ Clear the fstype bits in TTF/OTF fonts.
 
 Turn this on if Internet Explorer complains about 'Permission must be Installable' AND you have permission to do so.
 
+.TP
+.B --process-type3 <0|1> (Default: 0)
+If turned on, pdf2htmlEX will try to convert Type 3 fonts such that text can be rendered natively in HTML.
+Otherwise all text with Type 3 fonts will be rendered as image.
+
+This feature is highly experimental.
+
 .SS Text
 
 .TP
diff --git a/src/HTMLRenderer/font.cc b/src/HTMLRenderer/font.cc
index f94c4df..54c4e38 100644
--- a/src/HTMLRenderer/font.cc
+++ b/src/HTMLRenderer/font.cc
@@ -210,10 +210,10 @@ string HTMLRenderer::dump_type3_font (GfxFont * font, FontInfo & info)
     tm_transform_bbox(font_matrix, transformed_bbox);
     double transformed_bbox_width = transformed_bbox[2] - transformed_bbox[0];
     double transformed_bbox_height = transformed_bbox[3] - transformed_bbox[1];
-    // we want the glyphs is rendered in a box of size around 100 x 100
-    // for rectangles, the longer edge should be 100
     info.font_size_scale = std::max(transformed_bbox_width, transformed_bbox_height);
 
+    // we want the glyphs is rendered in a box of size around GLYPH_DUMP_EM_SIZE x GLYPH_DUMP_EM_SIZE
+    // for rectangles, the longer edge should be GLYPH_DUMP_EM_SIZE
     const double GLYPH_DUMP_EM_SIZE = 100.0;
     double scale = GLYPH_DUMP_EM_SIZE / info.font_size_scale;
 
@@ -242,6 +242,7 @@ string HTMLRenderer::dump_type3_font (GfxFont * font, FontInfo & info)
 
         auto glyph_width = ((Gfx8BitFont*)font)->getWidth(code);
 
+#if 1
         {
             // pain the glyph
             cairo_set_font_face(cr, cur_font->getFontFace());
@@ -273,8 +274,7 @@ string HTMLRenderer::dump_type3_font (GfxFont * font, FontInfo & info)
             double dummy = 0;
             cairo_matrix_transform_distance(&m2, &glyph_width, &dummy);
         }
-        
-        /*
+#else
         {
             // manually draw the char to get the metrics
             // adapted from _render_type3_glyph of poppler
@@ -308,6 +308,7 @@ string HTMLRenderer::dump_type3_font (GfxFont * font, FontInfo & info)
 
             // calculate the position of origin
             cairo_matrix_transform_point(&ctm, &ox, &oy);
+            oy -= transformed_bbox_height * scale;
             // calculate glyph width
             double dummy = 0;
             cairo_matrix_transform_distance(&ctm, &glyph_width, &dummy);
@@ -337,7 +338,7 @@ string HTMLRenderer::dump_type3_font (GfxFont * font, FontInfo & info)
             delete gfx;
             delete output_dev;
         }
-        */
+#endif
 
         {
             auto status = cairo_status(cr);
diff --git a/src/pdf2htmlEX.cc b/src/pdf2htmlEX.cc
index 2df3568..91547db 100644
--- a/src/pdf2htmlEX.cc
+++ b/src/pdf2htmlEX.cc
@@ -146,6 +146,7 @@ void parse_options (int argc, char **argv)
         .add("stretch-narrow-glyph", &param.stretch_narrow_glyph, 0, "stretch narrow glyphs instead of padding them")
         .add("squeeze-wide-glyph", &param.squeeze_wide_glyph, 1, "shrink wide glyphs instead of truncating them")
         .add("override-fstype", &param.override_fstype, 0, "clear the fstype bits in TTF/OTF fonts")
+        .add("process-type3", &param.process_type3, 0, "convert Type 3 fonts for web (experimental)")
         
         // text
         .add("heps", &param.h_eps, 1.0, "horizontal threshold for merging text, in pixels")
@@ -299,8 +300,13 @@ void check_param()
         exit(EXIT_FAILURE);
     }
 
-    //test
-    param.process_type3 = 1;
+#if not ENABLE_SVG
+    if(param.process_type3)
+    {
+        cerr << "process-type3 is enabled, however SVG support is not built in this version of pdf2htmlEX." << endl;
+        exit(EXIT_FAILURE);
+    }
+#endif
 }
 
 int main(int argc, char **argv)