# * gs;
# * pdflatex (optional);
# * pnmcrop (optional).
+# * pdftocairo (optional).
+# * epstopdf (optional).
# preview.sty is part of the preview-latex project
# http://preview-latex.sourceforge.net/
# [legacy_conversion_step2]
# 2) Call dvips to create one PS file for each DVI page
# [legacy_conversion_step3]
-# 3) If dvips fails look for PDF and call gs to produce bitmaps
-# 4) Otherwise call gs on each PostScript file to produce bitmaps
+# 3) If dvips fails look for PDF and call pdftocairo or gs to produce bitmaps
+# 4) Otherwise call pdftocairo or gs on each PostScript file to produce bitmaps
# [legacy_conversion_pdflatex]
# 5) Keep track of pages on which gs failed and pass them to pdflatex
-# 6) Call gs on the PDF output from pdflatex to produce bitmaps
+# 6) Call pdftocairo or gs on the PDF output from pdflatex to produce bitmaps
# 7) Extract and write to file (or return to lyxpreview2bitmap)
# metrics from both methods (standard and pdflatex)
# is required in certain cases, if hyperref is active for instance,
# (step 5, 6).
# If possible, dvipng should be used, as it's much faster.
+# If possible, the script will use pdftocairo instead of gs,
+# as it's much faster and gives better results.
import glob, os, pipes, re, string, sys
\definecolor{bg}{rgb}{%s}
\pagecolor{bg}
\usepackage[%s,tightpage]{preview}
+\IfFileExists{lmodern.sty}{\usepackage{lmodern}}{\usepackage{ae,aecomp}}
\makeatletter
\g@addto@macro\preview{\begingroup\color{bg}\special{ps::clippath fill}\color{fg}}
\g@addto@macro\endpreview{\endgroup}
# Creates a new LaTeX file from the original with pages specified in
# failed_pages, pass it through pdflatex and updates the metrics
# from the standard legacy route
-def legacy_conversion_pdflatex(latex_file, failed_pages, legacy_metrics, gs,
- gs_device, gs_ext, alpha, resolution, output_format):
+def legacy_conversion_pdflatex(latex_file, failed_pages, legacy_metrics,
+ use_pdftocairo, conv, gs_device, gs_ext, alpha, resolution, output_format):
# Search for pdflatex executable
pdflatex = find_exe(["pdflatex"])
pdflatex_status, pdflatex_stdout = run_latex(pdflatex, pdf_latex_file)
pdf_file = latex_file_re.sub(".pdf", pdf_latex_file)
-
- # GhostScript call to produce bitmaps
- gs_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \
- '-sOutputFile="%s%%d.%s" ' \
- '-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
- '-r%f "%s"' \
- % (gs, gs_device, latex_file_re.sub("", pdf_latex_file), \
- gs_ext, alpha, alpha, resolution, pdf_file)
- gs_status, gs_stdout = run_command(gs_call)
- if gs_status:
+ latex_file_root = latex_file_re.sub("", pdf_latex_file)
+
+ # Converter call to produce bitmaps
+ if use_pdftocairo:
+ conv_call = '%s -png -transp -r %d "%s" "%s"' \
+ % (conv, resolution, pdf_file, latex_file_root)
+ conv_status, conv_stdout = run_command(conv_call)
+ if not conv_status:
+ seqnum_re = re.compile("-([0-9]+)")
+ for name in glob.glob("%s-*.png" % latex_file_root):
+ match = seqnum_re.search(name)
+ if match != None:
+ new_name = seqnum_re.sub(str(int(match.group(1))), name)
+ os.rename(name, new_name)
+ else:
+ conv_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \
+ '-sOutputFile="%s%%d.%s" ' \
+ '-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
+ '-r%f "%s"' \
+ % (conv, gs_device, latex_file_root, \
+ gs_ext, alpha, alpha, resolution, pdf_file)
+ conv_status, conv_stdout = run_command(conv_call)
+
+ if conv_status:
# Give up!
warning("Some pages failed with all the possible routes")
else:
# Either latex and dvips have been run and we have a ps file, or
-# pdflatex has been run and we have a pdf file. Proceed with gs.
+# pdflatex has been run and we have a pdf file. Proceed with pdftocairo or gs.
def legacy_conversion_step3(latex_file, dpi, output_format, dvips_failed, skipMetrics = False):
# External programs used by the script.
gs = find_exe_or_terminate(["gswin32c", "gswin64c", "gs"])
pnmcrop = find_exe(["pnmcrop"])
+ pdftocairo = find_exe(["pdftocairo"])
+ epstopdf = find_exe(["epstopdf"])
+ use_pdftocairo = pdftocairo != None and output_format == "png"
+ if use_pdftocairo:
+ conv = pdftocairo
+ else:
+ conv = gs
# Files to process
pdf_file = latex_file_re.sub(".pdf", latex_file)
ps_file = latex_file_re.sub(".ps", latex_file)
- # Extract resolution data for gs from the log file.
+ # The latex file name without extension
+ latex_file_root = latex_file_re.sub("", latex_file)
+
+ # Extract resolution data for the converter from the log file.
log_file = latex_file_re.sub(".log", latex_file)
resolution = extract_resolution(log_file, dpi)
# Generate the bitmap images
if dvips_failed:
# dvips failed, maybe there's a PDF, try to produce bitmaps
- gs_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \
- '-sOutputFile="%s%%d.%s" ' \
- '-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
- '-r%f "%s"' \
- % (gs, gs_device, latex_file_re.sub("", latex_file), \
- gs_ext, alpha, alpha, resolution, pdf_file)
-
- gs_status, gs_stdout = run_command(gs_call)
- if gs_status:
- error("Failed: %s %s" % (os.path.basename(gs), ps_file))
+ if use_pdftocairo:
+ conv_call = '%s -png -transp -r %d "%s" "%s"' \
+ % (pdftocairo, resolution, pdf_file, latex_file_root)
+
+ conv_status, conv_stdout = run_command(conv_call)
+ if not conv_status:
+ seqnum_re = re.compile("-([0-9]+)")
+ for name in glob.glob("%s-*.png" % latex_file_root):
+ match = seqnum_re.search(name)
+ if match != None:
+ new_name = seqnum_re.sub(str(int(match.group(1))), name)
+ os.rename(name, new_name)
+ else:
+ conv_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \
+ '-sOutputFile="%s%%d.%s" ' \
+ '-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
+ '-r%f "%s"' \
+ % (gs, gs_device, latex_file_root, \
+ gs_ext, alpha, alpha, resolution, pdf_file)
+
+ conv_status, conv_stdout = run_command(conv_call)
+
+ if conv_status:
+ error("Failed: %s %s" % (os.path.basename(conv), pdf_file))
else:
- # Model for calling gs on each file
- gs_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \
- '-sOutputFile="%s%%d.%s" ' \
- '-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
- '-r%f "%%s"' \
- % (gs, gs_device, latex_file_re.sub("", latex_file), \
- gs_ext, alpha, alpha, resolution)
+ # Model for calling the converter on each file
+ if use_pdftocairo and epstopdf != None:
+ conv_call = '%s -png -transp -singlefile -r %d "%%s.pdf" "%s%%d"' \
+ % (pdftocairo, resolution, latex_file_root)
+ else:
+ conv_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \
+ '-sOutputFile="%s%%d.%s" ' \
+ '-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
+ '-r%f "%%s"' \
+ % (gs, gs_device, latex_file_root, \
+ gs_ext, alpha, alpha, resolution)
i = 0
# Collect all the PostScript files (like *.001, *.002, ...)
- ps_files = glob.glob("%s.[0-9][0-9][0-9]" % latex_file_re.sub("", latex_file))
+ ps_files = glob.glob("%s.[0-9][0-9][0-9]" % latex_file_root)
ps_files.sort()
- # Call GhostScript for each file
+ # Call the converter for each file
for file in ps_files:
i = i + 1
progress("Processing page %s, file %s" % (i, file))
- gs_status, gs_stdout = run_command(gs_call % (i, file))
- if gs_status:
- # gs failed, keep track of this
- warning("Ghostscript failed on page %s, file %s" % (i, file))
+ if use_pdftocairo and epstopdf != None:
+ conv_name = "PdfToCairo"
+ conv_status, conv_stdout = run_command("%s --outfile=%s.pdf %s"
+ % (epstopdf, file, file))
+ if not conv_status:
+ conv_status, conv_stdout = run_command(conv_call % (file, i))
+ else:
+ conv_name = "Ghostscript"
+ conv_status, conv_stdout = run_command(conv_call % (i, file))
+
+ if conv_status:
+ # The converter failed, keep track of this
+ warning("%s failed on page %s, file %s" % (conv_name, i, file))
failed_pages.append(i)
# Pass failed pages to pdflatex
if len(failed_pages) > 0:
- legacy_conversion_pdflatex(latex_file, failed_pages, legacy_metrics, gs,
- gs_device, gs_ext, alpha, resolution, output_format)
+ legacy_conversion_pdflatex(latex_file, failed_pages, legacy_metrics,
+ use_pdftocairo, conv, gs_device, gs_ext, alpha, resolution,
+ output_format)
- # Crop the images
- if pnmcrop != None:
- crop_files(pnmcrop, latex_file_re.sub("", latex_file))
+ # Crop the ppm images
+ if pnmcrop != None and output_format == "ppm":
+ crop_files(pnmcrop, latex_file_root)
# Allow to skip .metrics creation for custom management
# (see the dvipng method)