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PDF: Add Encoding dictionary to TrueType fonts

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This is a fix for the bugs reported here

  http://lists.freedesktop.org/archives/cairo/2006-December/008984.html

  http://lists.freedesktop.org/archives/cairo/2007-January/009387.html

Cairo PDFs will not print correctly from Adobe Reader. The symptoms are
that all the glyphs on the page are replaced with the same glyph.

According to the PDF Reference an Encoding dictionary is not required
for the symbolic fonts used by cairo. However including the Encoding
dictionary fixes the printing problem.
This commit is contained in:
Adrian Johnson 2007-02-04 19:00:16 +10:30
parent 3f8d5f505a
commit 05ff2c77da
1 changed files with 19 additions and 2 deletions
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21
src/cairo-pdf-surface.c
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@ -1876,7 +1876,7 @@ static cairo_status_t
_cairo_pdf_surface_emit_truetype_font_subset (cairo_pdf_surface_t *surface,
cairo_scaled_font_subset_t *font_subset)
{
cairo_pdf_resource_t stream, descriptor, subset_resource;
cairo_pdf_resource_t stream, descriptor, encoding, subset_resource;
cairo_status_t status;
cairo_pdf_font_t font;
cairo_truetype_subset_t subset;
@ -1939,6 +1939,21 @@ _cairo_pdf_surface_emit_truetype_font_subset (cairo_pdf_surface_t *surface,
subset.descent,
stream.id);
encoding = _cairo_pdf_surface_new_object (surface);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\r\n"
"<< /Type /Encoding\r\n"
" /Differences [ ",
encoding.id);
for (i = 0; i < font_subset->num_glyphs; i++)
_cairo_output_stream_printf (surface->output, "/g%d ", i);
_cairo_output_stream_printf (surface->output,
" ]\r\n"
">>\r\n"
"endobj\r\n");
subset_resource = _cairo_pdf_surface_new_object (surface);
_cairo_output_stream_printf (surface->output,
"%d 0 obj\r\n"
@ -1948,11 +1963,13 @@ _cairo_pdf_surface_emit_truetype_font_subset (cairo_pdf_surface_t *surface,
" /FirstChar 0\r\n"
" /LastChar %d\r\n"
" /FontDescriptor %d 0 R\r\n"
" /Encoding %d 0 R\r\n"
" /Widths [",
subset_resource.id,
subset.base_font,
font_subset->num_glyphs - 1,
descriptor.id);
descriptor.id,
encoding.id);
for (i = 0; i < font_subset->num_glyphs; i++)
_cairo_output_stream_printf (surface->output,