def _create_bitmap(self, width, height):
self._data = (ctypes.c_byte * (4 * width * height))()
self._bitmap = ctypes.c_void_p()
self._format = PixelFormat32bppARGB
gdiplus.GdipCreateBitmapFromScan0(width, height, width * 4,
self._format, self._data,
ctypes.byref(self._bitmap))
self._graphics = ctypes.c_void_p()
gdiplus.GdipGetImageGraphicsContext(self._bitmap,
ctypes.byref(self._graphics))
gdiplus.GdipSetPageUnit(self._graphics, UnitPixel)
self._dc = user32.GetDC(0)
gdi32.SelectObject(self._dc, self.font.hfont)
gdiplus.GdipSetTextRenderingHint(self._graphics,
TextRenderingHintAntiAliasGridFit)
self._brush = ctypes.c_void_p()
gdiplus.GdipCreateSolidFill(0xffffffff, ctypes.byref(self._brush))
self._matrix = ctypes.c_void_p()
gdiplus.GdipCreateMatrix(ctypes.byref(self._matrix))
self._flags = (DriverStringOptionsCmapLookup
| DriverStringOptionsRealizedAdvance)
self._rect = Rect(0, 0, width, height)
self._bitmap_height = height
def __init__(self, font):
super(Win32GlyphRenderer, self).__init__(font)
self.font = font
# Pessimistically round up width and height to 4 byte alignment
width = font.max_glyph_width
height = font.ascent - font.descent
width = (width | 0x3) + 1
height = (height | 0x3) + 1
self._create_bitmap(width, height)
gdi32.SelectObject(self._dc, self.font.hfont)
def _get_image(self, text, width, height, lsb):
# There's no such thing as a greyscale bitmap format in GDI. We can
# create an 8-bit palette bitmap with 256 shades of grey, but
# unfortunately antialiasing will not work on such a bitmap. So, we
# use a 32-bit bitmap and use the red channel as OpenGL's alpha.
gdi32.SelectObject(self._dc, self._bitmap)
gdi32.SelectObject(self._dc, self.font.hfont)
gdi32.SetBkColor(self._dc, 0x0)
gdi32.SetTextColor(self._dc, 0x00ffffff)
gdi32.SetBkMode(self._dc, OPAQUE)
# Draw to DC
user32.FillRect(self._dc, byref(self._bitmap_rect), self._black)
gdi32.ExtTextOutA(self._dc, -lsb, 0, 0, None, text, len(text), None)
gdi32.GdiFlush()
# Create glyph object and copy bitmap data to texture
image = pyglet.image.ImageData(width, height, 'AXXX',
self._bitmap_data,
self._bitmap_rect.right * 4)
return image
def __init__(self, name, size, bold=False, italic=False, dpi=None):
super(Win32Font, self).__init__()
self.logfont = self.get_logfont(name, size, bold, italic, dpi)
self.hfont = gdi32.CreateFontIndirectA(byref(self.logfont))
# Create a dummy DC for coordinate mapping
dc = user32.GetDC(0)
metrics = TEXTMETRIC()
gdi32.SelectObject(dc, self.hfont)
gdi32.GetTextMetricsA(dc, byref(metrics))
self.ascent = metrics.tmAscent
self.descent = -metrics.tmDescent
self.max_glyph_width = metrics.tmMaxCharWidth
