def use_pango_font(font, start, count, will_call_prepost=False):
import gi
gi.require_version('Pango', '1.0')
gi.require_version('PangoCairo', '1.0')
from gi.repository import Pango
from gi.repository import PangoCairo
#from gi.repository import Cairo as cairo
import cairo
fontDesc = Pango.FontDescription(font)
a = array.array('b', itertools.repeat(0, 256 * 256))
surface = cairo.ImageSurface.create_for_data(a, cairo.FORMAT_A8, 256,
256)
context = cairo.Context(surface)
pango_context = PangoCairo.create_context(context)
layout = PangoCairo.create_layout(context)
fontmap = PangoCairo.font_map_get_default()
font = fontmap.load_font(fontmap.create_context(), fontDesc)
layout.set_font_description(fontDesc)
metrics = font.get_metrics()
descent = metrics.get_descent()
d = descent / Pango.SCALE
linespace = metrics.get_ascent() + metrics.get_descent()
width = metrics.get_approximate_char_width()
glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT)
glPixelStorei(GL_UNPACK_SWAP_BYTES, 0)
glPixelStorei(GL_UNPACK_LSB_FIRST, 1)
glPixelStorei(GL_UNPACK_ROW_LENGTH, 256)
glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 256)
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0)
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0)
glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0)
glPixelStorei(GL_UNPACK_ALIGNMENT, 1)
glPixelZoom(1, -1)
base = glGenLists(count)
for i in range(count):
ch = chr(start + i)
layout.set_text(ch, -1)
w, h = layout.get_size()
context.save()
context.new_path()
context.rectangle(0, 0, 256, 256)
context.set_source_rgba(0., 0., 0., 0.)
context.set_operator(cairo.OPERATOR_SOURCE)
context.paint()
context.restore()
context.save()
context.set_source_rgba(1., 1., 1., 1.)
context.set_operator(cairo.OPERATOR_SOURCE)
context.move_to(0, 0)
PangoCairo.update_context(context, pango_context)
PangoCairo.show_layout(context, layout)
context.restore()
w, h = int(w / Pango.SCALE), int(h / Pango.SCALE)
glNewList(base + i, GL_COMPILE)
glBitmap(0, 0, 0, 0, 0, h - d, ''.encode())
#glDrawPixels(0, 0, 0, 0, 0, h-d, '');
if not will_call_prepost:
pango_font_pre()
if w and h:
try:
pass
glDrawPixels(w, h, GL_LUMINANCE, GL_UNSIGNED_BYTE,
a.tostring())
except Exception as e:
print("glnav Exception ", e)
glBitmap(0, 0, 0, 0, w, -h + d, ''.encode())
if not will_call_prepost:
pango_font_post()
glEndList()
glPopClientAttrib()
return base, int(width / Pango.SCALE), int(linespace / Pango.SCALE)
def run(self):
"""Create the output file.
The derived class overrides EXT and create_cairo_surface
"""
# get paper dimensions
paper_width = self.paper.get_size().get_width() * DPI / 2.54
paper_height = self.paper.get_size().get_height() * DPI / 2.54
page_width = round(self.paper.get_usable_width() * DPI / 2.54)
page_height = round(self.paper.get_usable_height() * DPI / 2.54)
left_margin = self.paper.get_left_margin() * DPI / 2.54
top_margin = self.paper.get_top_margin() * DPI / 2.54
# create cairo context and pango layout
filename = self._backend.filename
# Cairo can't reliably handle unicode filenames on Linux or
# Windows, so open the file for it.
with open(filename, 'wb') as fd:
try:
surface = self.create_cairo_surface(fd, paper_width,
paper_height)
surface.set_fallback_resolution(300, 300)
cr = cairo.Context(surface)
fontmap = PangoCairo.font_map_new()
fontmap.set_resolution(DPI)
pango_context = fontmap.create_context()
options = cairo.FontOptions()
options.set_hint_metrics(cairo.HINT_METRICS_OFF)
PangoCairo.context_set_font_options(pango_context, options)
layout = Pango.Layout(pango_context)
PangoCairo.update_context(cr, pango_context)
# paginate the document
self.paginate_document(layout, page_width, page_height, DPI,
DPI)
body_pages = self._pages
# build the table of contents and alphabetical index
toc_page = None
index_page = None
toc = []
index = {}
for page_nr, page in enumerate(body_pages):
if page.has_toc():
toc_page = page_nr
if page.has_index():
index_page = page_nr
for mark in page.get_marks():
if mark.type == INDEX_TYPE_ALP:
if mark.key in index:
if page_nr + 1 not in index[mark.key]:
index[mark.key].append(page_nr + 1)
else:
index[mark.key] = [page_nr + 1]
elif mark.type == INDEX_TYPE_TOC:
toc.append([mark, page_nr + 1])
# paginate the table of contents
rebuild_required = False
if toc_page is not None:
toc_pages = self.__generate_toc(layout, page_width,
page_height, toc)
offset = len(toc_pages) - 1
if offset > 0:
self.__increment_pages(toc, index, toc_page, offset)
rebuild_required = True
else:
toc_pages = []
# paginate the index
if index_page is not None:
index_pages = self.__generate_index(
layout, page_width, page_height, index)
offset = len(index_pages) - 1
if offset > 0:
self.__increment_pages(toc, index, index_page, offset)
rebuild_required = True
else:
index_pages = []
# rebuild the table of contents and index if required
if rebuild_required:
if toc_page is not None:
toc_pages = self.__generate_toc(
layout, page_width, page_height, toc)
if index_page is not None:
index_pages = self.__generate_index(
layout, page_width, page_height, index)
# render the pages
if toc_page is not None:
body_pages = body_pages[:toc_page] + toc_pages + \
body_pages[toc_page+1:]
if index_page is not None:
body_pages = body_pages[:index_page] + index_pages + \
body_pages[index_page+1:]
self._pages = body_pages
for page_nr in range(len(self._pages)):
cr.save()
cr.translate(left_margin, top_margin)
self.draw_page(page_nr, cr, layout, page_width,
page_height, DPI, DPI)
cr.show_page()
cr.restore()
# close the surface (file)
surface.finish()
except IOError as msg:
errmsg = "%s\n%s" % (_("Could not create %s") % filename, msg)
raise ReportError(errmsg)
except Exception as err:
errmsg = "%s\n%s" % (_("Could not create %s") % filename, err)
raise ReportError(errmsg)
def run(self):
"""Create the output file.
The derived class overrides EXT and create_cairo_surface
"""
# get paper dimensions
paper_width = self.paper.get_size().get_width() * DPI / 2.54
paper_height = self.paper.get_size().get_height() * DPI / 2.54
page_width = round(self.paper.get_usable_width() * DPI / 2.54)
page_height = round(self.paper.get_usable_height() * DPI / 2.54)
left_margin = self.paper.get_left_margin() * DPI / 2.54
top_margin = self.paper.get_top_margin() * DPI / 2.54
# create cairo context and pango layout
filename = self._backend.filename
# Cairo can't reliably handle unicode filenames on Linux or
# Windows, so open the file for it.
with open(filename, 'wb') as fd:
try:
surface = self.create_cairo_surface(fd, paper_width,
paper_height)
surface.set_fallback_resolution(300, 300)
cr = cairo.Context(surface)
fontmap = PangoCairo.font_map_new()
fontmap.set_resolution(DPI)
pango_context = fontmap.create_context()
options = cairo.FontOptions()
options.set_hint_metrics(cairo.HINT_METRICS_OFF)
PangoCairo.context_set_font_options(pango_context, options)
layout = Pango.Layout(pango_context)
PangoCairo.update_context(cr, pango_context)
# paginate the document
self.paginate_document(layout, page_width, page_height,
DPI, DPI)
body_pages = self._pages
# build the table of contents and alphabetical index
toc_page = None
index_page = None
toc = []
index = {}
for page_nr, page in enumerate(body_pages):
if page.has_toc():
toc_page = page_nr
if page.has_index():
index_page = page_nr
for mark in page.get_marks():
if mark.type == INDEX_TYPE_ALP:
if mark.key in index:
if page_nr + 1 not in index[mark.key]:
index[mark.key].append(page_nr + 1)
else:
index[mark.key] = [page_nr + 1]
elif mark.type == INDEX_TYPE_TOC:
toc.append([mark, page_nr + 1])
# paginate the table of contents
rebuild_required = False
if toc_page is not None:
toc_pages = self.__generate_toc(layout, page_width,
page_height, toc)
offset = len(toc_pages) - 1
if offset > 0:
self.__increment_pages(toc, index, toc_page, offset)
rebuild_required = True
else:
toc_pages = []
# paginate the index
if index_page is not None:
index_pages = self.__generate_index(layout, page_width,
page_height, index)
offset = len(index_pages) - 1
if offset > 0:
self.__increment_pages(toc, index, index_page, offset)
rebuild_required = True
else:
index_pages = []
# rebuild the table of contents and index if required
if rebuild_required:
if toc_page is not None:
toc_pages = self.__generate_toc(layout, page_width,
page_height, toc)
if index_page is not None:
index_pages = self.__generate_index(layout, page_width,
page_height, index)
# render the pages
if toc_page is not None:
body_pages = body_pages[:toc_page] + toc_pages + \
body_pages[toc_page+1:]
if index_page is not None:
body_pages = body_pages[:index_page] + index_pages + \
body_pages[index_page+1:]
self._pages = body_pages
for page_nr in range(len(self._pages)):
cr.save()
cr.translate(left_margin, top_margin)
self.draw_page(page_nr, cr, layout,
page_width, page_height,
DPI, DPI)
cr.show_page()
cr.restore()
# close the surface (file)
surface.finish()
except IOError as msg:
errmsg = "%s\n%s" % (_("Could not create %s") % filename, msg)
raise ReportError(errmsg)
except Exception as err:
errmsg = "%s\n%s" % (_("Could not create %s") % filename, err)
raise ReportError(errmsg)
