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Add PCL detection and rendering support.

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This commit is contained in:
Roberto Rosario
2016-02-25 01:27:43 -04:00
parent 378a346e79
commit 7e67a2384f
3 changed files with 61 additions and 2 deletions
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50
mayan/apps/converter/backends/python.py
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@@ -20,7 +20,7 @@ from common.utils import fs_cleanup
from ..classes import ConverterBase
from ..exceptions import PageCountError
from ..settings import setting_pdftoppm_path
from ..settings import setting_gpcl_path, setting_pdftoppm_path
try:
pdftoppm = sh.Command(setting_pdftoppm_path.value)
@@ -29,6 +29,13 @@ except sh.CommandNotFound:
else:
pdftoppm = pdftoppm.bake('-png')
try:
gpcl = sh.Command(setting_gpcl_path.value)
except sh.CommandNotFound:
gpcl = None
else:
gpcl = gpcl.bake('-dNOPAUSE', '-dSAFER', '-dBATCH', '-sOutputFile=-')
Image.init()
logger = logging.getLogger(__name__)
@@ -48,6 +55,26 @@ class Python(ConverterBase):
def convert(self, *args, **kwargs):
super(Python, self).convert(*args, **kwargs)
if self.mime_type == 'application/x-pcl' and gpcl:
new_file_object, input_filepath = tempfile.mkstemp()
self.file_object.seek(0)
os.write(new_file_object, self.file_object.read())
self.file_object.seek(0)
os.close(new_file_object)
image_buffer = io.BytesIO()
try:
gpcl(
'-r300', '-sDEVICE=jpeg',
'-dFirstPage={}'.format(self.page_number + 1),
'-dLastPage={}'.format(self.page_number + 1),
input_filepath, _out=image_buffer
)
image_buffer.seek(0)
return Image.open(image_buffer)
finally:
fs_cleanup(input_filepath)
if self.mime_type == 'application/pdf' and pdftoppm:
new_file_object, input_filepath = tempfile.mkstemp()
@@ -61,7 +88,7 @@ class Python(ConverterBase):
try:
pdftoppm(
input_filepath, f=self.page_number + 1,
l=self.page_number + 1, _out=image_buffer
l=self.page_number + 1, _out=image_buffer,
)
image_buffer.seek(0)
return Image.open(image_buffer)
@@ -73,6 +100,25 @@ class Python(ConverterBase):
page_count = 1
if self.mime_type == 'application/x-pcl' and gpcl:
new_file_object, input_filepath = tempfile.mkstemp()
self.file_object.seek(0)
os.write(new_file_object, self.file_object.read())
self.file_object.seek(0)
os.close(new_file_object)
file_buffer = io.BytesIO()
try:
gpcl(
'-sDEVICE=pdfwrite', input_filepath, _out=file_buffer
)
file_buffer.seek(0)
self.file_object = file_buffer
self.mime_type = 'application/pdf'
finally:
fs_cleanup(input_filepath)
if self.mime_type == 'application/pdf' or self.soffice_file:
# If file is a PDF open it with slate to determine the page count
if self.soffice_file: