def render(self, text):
ch = ctypes.create_unicode_buffer(text)
len_ch = len(text)
# Layout rectangle; not clipped against so not terribly important.
width = 10000
height = self._bitmap_height
rect = Rectf(
0, self._bitmap_height - self.font.ascent + self.font.descent,
width, height)
# Set up GenericTypographic with 1 character measure range
generic = ctypes.c_void_p()
gdiplus.GdipStringFormatGetGenericTypographic(ctypes.byref(generic))
format = ctypes.c_void_p()
gdiplus.GdipCloneStringFormat(generic, ctypes.byref(format))
gdiplus.GdipDeleteStringFormat(generic)
# Measure advance
# XXX HACK HACK HACK
# Windows GDI+ is a filthy broken toy. No way to measure the bounding
# box of a string, or to obtain LSB. What a joke.
#
# For historical note, GDI cannot be used because it cannot composite
# into a bitmap with alpha.
#
# It looks like MS have abandoned GDI and GDI+ and are finally
# supporting accurate text measurement with alpha composition in .NET
# 2.0 (WinForms) via the TextRenderer class; this has no C interface
# though, so we're entirely screwed.
#
# So anyway, we first try to get the width with GdipMeasureString.
# Then if it's a TrueType font, we use GetCharABCWidthsW to get the
# correct LSB. If it's a negative LSB, we move the layoutRect `rect`
# to the right so that the whole glyph is rendered on the surface.
# For positive LSB, we let the renderer render the correct white
# space and we don't pass the LSB info to the Glyph.set_bearings
bbox = Rectf()
flags = (StringFormatFlagsMeasureTrailingSpaces
| StringFormatFlagsNoClip | StringFormatFlagsNoFitBlackBox)
gdiplus.GdipSetStringFormatFlags(format, flags)
gdiplus.GdipMeasureString(self._graphics, ch,
len_ch, self.font._gdipfont,
ctypes.byref(rect), format,
ctypes.byref(bbox), None, None)
lsb = 0
advance = int(math.ceil(bbox.width))
width = advance
# This hack bumps up the width if the font is italic;
# this compensates for some common fonts. It's also a stupid
# waste of texture memory.
if self.font.italic:
width += width // 2
# Do not enlarge more than the _rect width.
width = min(width, self._rect.Width)
# GDI functions only work for a single character so we transform
# grapheme \r\n into \r
if text == '\r\n':
text = '\r'
abc = ABC()
# Check if ttf font.
if gdi32.GetCharABCWidthsW(self._dc, ord(text), ord(text), byref(abc)):
lsb = abc.abcA
if lsb < 0:
# Negative LSB: we shift the layout rect to the right
# Otherwise we will cut the left part of the glyph
rect.x = -lsb
width -= lsb
# XXX END HACK HACK HACK
# Draw character to bitmap
gdiplus.GdipGraphicsClear(self._graphics, 0x00000000)
gdiplus.GdipDrawString(self._graphics, ch, len_ch, self.font._gdipfont,
ctypes.byref(rect), format, self._brush)
gdiplus.GdipFlush(self._graphics, 1)
gdiplus.GdipDeleteStringFormat(format)
bitmap_data = BitmapData()
gdiplus.GdipBitmapLockBits(self._bitmap, byref(self._rect),
ImageLockModeRead, self._format,
byref(bitmap_data))
# Create buffer for RawImage
buffer = create_string_buffer(bitmap_data.Stride * bitmap_data.Height)
memmove(buffer, bitmap_data.Scan0, len(buffer))
# Unlock data
gdiplus.GdipBitmapUnlockBits(self._bitmap, byref(bitmap_data))
image = pyglet.image.ImageData(width, height, 'BGRA', buffer,
-bitmap_data.Stride)
glyph = self.font.create_glyph(image)
# Only pass negative LSB info
lsb = min(lsb, 0)
glyph.set_bearings(-self.font.descent, lsb, advance)
return glyph
def render(self, text):
ch = ctypes.create_unicode_buffer(text)
len_ch = len(text)
# Layout rectangle; not clipped against so not terribly important.
width = 10000
height = self._bitmap_height
rect = Rectf(
0, self._bitmap_height - self.font.ascent + self.font.descent,
width, height)
# Set up GenericTypographic with 1 character measure range
generic = ctypes.c_void_p()
gdiplus.GdipStringFormatGetGenericTypographic(ctypes.byref(generic))
format = ctypes.c_void_p()
gdiplus.GdipCloneStringFormat(generic, ctypes.byref(format))
gdiplus.GdipDeleteStringFormat(generic)
# Measure advance
# XXX HACK HACK HACK
# Windows GDI+ is a filthy broken toy. No way to measure the bounding
# box of a string, or to obtain LSB. What a joke.
#
# For historical note, GDI cannot be used because it cannot composite
# into a bitmap with alpha.
#
# It looks like MS have abandoned GDI and GDI+ and are finally
# supporting accurate text measurement with alpha composition in .NET
# 2.0 (WinForms) via the TextRenderer class; this has no C interface
# though, so we're entirely screwed.
#
# So anyway, we first try to get the lsb and width from GDI
# GetCharABCWidthsW function. If it does not work (because we don't
# use a TrueType font), we try to use GdipMeasureString.
# Tests show that it's not working well for .fon fonts.
# GDI functions only work for a single character so we transform
# grapheme \r\n into \r
if text == '\r\n':
text = '\r'
abc = ABC()
# Check if ttf font.
if gdi32.GetCharABCWidthsW(self._dc, ord(text), ord(text), byref(abc)):
lsb = abc.abcA
width = abc.abcB
advance = abc.abcA + abc.abcB + abc.abcC
rect.x = -lsb
else:
# What font could this be ???
# Revert to the old way to check bounding box.
bbox = Rectf()
flags = (StringFormatFlagsMeasureTrailingSpaces
| StringFormatFlagsNoClip
| StringFormatFlagsNoFitBlackBox)
gdiplus.GdipSetStringFormatFlags(format, flags)
gdiplus.GdipMeasureString(self._graphics, ch,
len_ch, self.font._gdipfont,
ctypes.byref(rect), format,
ctypes.byref(bbox), None, None)
lsb = 0
advance = int(math.ceil(bbox.width))
width = advance
# XXX END HACK HACK HACK
# Draw character to bitmap
gdiplus.GdipGraphicsClear(self._graphics, 0x00000000)
gdiplus.GdipDrawString(self._graphics, ch, len_ch, self.font._gdipfont,
ctypes.byref(rect), format, self._brush)
gdiplus.GdipFlush(self._graphics, 1)
gdiplus.GdipDeleteStringFormat(format)
bitmap_data = BitmapData()
gdiplus.GdipBitmapLockBits(self._bitmap, byref(self._rect),
ImageLockModeRead, self._format,
byref(bitmap_data))
# Create buffer for RawImage
buffer = create_string_buffer(bitmap_data.Stride * bitmap_data.Height)
memmove(buffer, bitmap_data.Scan0, len(buffer))
# Unlock data
gdiplus.GdipBitmapUnlockBits(self._bitmap, byref(bitmap_data))
image = pyglet.image.ImageData(width, height, 'BGRA', buffer,
-bitmap_data.Stride)
glyph = self.font.create_glyph(image)
glyph.set_bearings(-self.font.descent, lsb, advance)
return glyph