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9a75212062
Difficult-Rocket/bin/pyglet/font/win32.py
沈瑗杰 9a75212062 some change
2021-04-02 23:31:04 +08:00

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# ----------------------------------------------------------------------------
# pyglet
# Copyright (c) 2006-2008 Alex Holkner
# Copyright (c) 2008-2020 pyglet contributors
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of pyglet nor the names of its
# contributors may be used to endorse or promote products
# derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ----------------------------------------------------------------------------
# TODO Windows Vista: need to call SetProcessDPIAware? May affect GDI+ calls as well as font.
import math
from sys import byteorder
import pyglet
from pyglet.font import base
from pyglet.font import win32query
import pyglet.image
from pyglet.libs.win32.constants import *
from pyglet.libs.win32.types import *
from pyglet.libs.win32 import _gdi32 as gdi32, _user32 as user32
from pyglet.libs.win32 import _kernel32 as kernel32
from pyglet.util import asbytes
_debug_font = pyglet.options['debug_font']
def str_ucs2(text):
if byteorder == 'big':
text = text.encode('utf_16_be')
else:
text = text.encode('utf_16_le') # explicit endian avoids BOM
return create_string_buffer(text + '\0')
_debug_dir = 'debug_font'
def _debug_filename(base, extension):
import os
if not os.path.exists(_debug_dir):
os.makedirs(_debug_dir)
name = '%s-%%d.%%s' % os.path.join(_debug_dir, base)
num = 1
while os.path.exists(name % (num, extension)):
num += 1
return name % (num, extension)
def _debug_image(image, name):
filename = _debug_filename(name, 'png')
image.save(filename)
_debug('Saved image %r to %s' % (image, filename))
_debug_logfile = None
def _debug(msg):
global _debug_logfile
if not _debug_logfile:
_debug_logfile = open(_debug_filename('log', 'txt'), 'wt')
_debug_logfile.write(msg + '\n')
class Win32GlyphRenderer(base.GlyphRenderer):
def __init__(self, font):
self._bitmap = None
self._dc = None
self._bitmap_rect = None
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 _create_bitmap(self, width, height):
pass
def render(self, text):
raise NotImplementedError('abstract')
class GDIGlyphRenderer(Win32GlyphRenderer):
def __del__(self):
try:
if self._dc:
gdi32.DeleteDC(self._dc)
if self._bitmap:
gdi32.DeleteObject(self._bitmap)
except:
pass
def render(self, text):
# Attempt to get ABC widths (only for TrueType)
abc = ABC()
if gdi32.GetCharABCWidthsW(self._dc,
ord(text), ord(text), byref(abc)):
width = abc.abcB
lsb = abc.abcA
advance = abc.abcA + abc.abcB + abc.abcC
else:
width_buf = c_int()
gdi32.GetCharWidth32W(self._dc,
ord(text), ord(text), byref(width_buf))
width = width_buf.value
lsb = 0
advance = width
# Can't get glyph-specific dimensions, use whole line-height.
height = self._bitmap_height
image = self._get_image(text, width, height, lsb)
glyph = self.font.create_glyph(image)
glyph.set_bearings(-self.font.descent, lsb, advance)
if _debug_font:
_debug('%r.render(%s)' % (self, text))
_debug('abc.abcA = %r' % abc.abcA)
_debug('abc.abcB = %r' % abc.abcB)
_debug('abc.abcC = %r' % abc.abcC)
_debug('width = %r' % width)
_debug('height = %r' % height)
_debug('lsb = %r' % lsb)
_debug('advance = %r' % advance)
_debug_image(image, 'glyph_%s' % text)
_debug_image(self.font.textures[0], 'tex_%s' % text)
return glyph
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 _create_bitmap(self, width, height):
self._black = gdi32.GetStockObject(BLACK_BRUSH)
self._white = gdi32.GetStockObject(WHITE_BRUSH)
if self._dc:
gdi32.ReleaseDC(self._dc)
if self._bitmap:
gdi32.DeleteObject(self._bitmap)
pitch = width * 4
data = POINTER(c_byte * (height * pitch))()
info = BITMAPINFO()
info.bmiHeader.biSize = sizeof(info.bmiHeader)
info.bmiHeader.biWidth = width
info.bmiHeader.biHeight = height
info.bmiHeader.biPlanes = 1
info.bmiHeader.biBitCount = 32
info.bmiHeader.biCompression = BI_RGB
self._dc = gdi32.CreateCompatibleDC(None)
self._bitmap = gdi32.CreateDIBSection(None,
byref(info), DIB_RGB_COLORS, byref(data), None,
0)
# Spookiness: the above line causes a "not enough storage" error,
# even though that error cannot be generated according to docs,
# and everything works fine anyway. Call SetLastError to clear it.
kernel32.SetLastError(0)
self._bitmap_data = data.contents
self._bitmap_rect = RECT()
self._bitmap_rect.left = 0
self._bitmap_rect.right = width
self._bitmap_rect.top = 0
self._bitmap_rect.bottom = height
self._bitmap_height = height
if _debug_font:
_debug('%r._create_dc(%d, %d)' % (self, width, height))
_debug('_dc = %r' % self._dc)
_debug('_bitmap = %r' % self._bitmap)
_debug('pitch = %r' % pitch)
_debug('info.bmiHeader.biSize = %r' % info.bmiHeader.biSize)
class Win32Font(base.Font):
glyph_renderer_class = GDIGlyphRenderer
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
user32.ReleaseDC(0, dc)
def __del__(self):
gdi32.DeleteObject(self.hfont)
@staticmethod
def get_logfont(name, size, bold, italic, dpi):
# Create a dummy DC for coordinate mapping
dc = user32.GetDC(0)
if dpi is None:
dpi = 96
logpixelsy = dpi
logfont = LOGFONT()
# Conversion of point size to device pixels
logfont.lfHeight = int(-size * logpixelsy // 72)
if bold:
logfont.lfWeight = FW_BOLD
else:
logfont.lfWeight = FW_NORMAL
logfont.lfItalic = italic
logfont.lfFaceName = asbytes(name)
logfont.lfQuality = ANTIALIASED_QUALITY
user32.ReleaseDC(0, dc)
return logfont
@classmethod
def have_font(cls, name):
# [ ] add support for loading raster fonts
return win32query.have_font(name)
@classmethod
def add_font_data(cls, data):
numfonts = c_uint32()
gdi32.AddFontMemResourceEx(data, len(data), 0, byref(numfonts))
# --- GDI+ font rendering ---
from pyglet.image.codecs.gdiplus import PixelFormat32bppARGB, gdiplus, Rect
from pyglet.image.codecs.gdiplus import ImageLockModeRead, BitmapData
DriverStringOptionsCmapLookup = 1
DriverStringOptionsRealizedAdvance = 4
TextRenderingHintAntiAlias = 4
TextRenderingHintAntiAliasGridFit = 3
StringFormatFlagsDirectionRightToLeft = 0x00000001
StringFormatFlagsDirectionVertical = 0x00000002
StringFormatFlagsNoFitBlackBox = 0x00000004
StringFormatFlagsDisplayFormatControl = 0x00000020
StringFormatFlagsNoFontFallback = 0x00000400
StringFormatFlagsMeasureTrailingSpaces = 0x00000800
StringFormatFlagsNoWrap = 0x00001000
StringFormatFlagsLineLimit = 0x00002000
StringFormatFlagsNoClip = 0x00004000
class Rectf(ctypes.Structure):
_fields_ = [
('x', ctypes.c_float),
('y', ctypes.c_float),
('width', ctypes.c_float),
('height', ctypes.c_float),
]
class GDIPlusGlyphRenderer(Win32GlyphRenderer):
def __del__(self):
try:
if self._matrix:
res = gdiplus.GdipDeleteMatrix(self._matrix)
if self._brush:
res = gdiplus.GdipDeleteBrush(self._brush)
if self._graphics:
res = gdiplus.GdipDeleteGraphics(self._graphics)
if self._bitmap:
res = gdiplus.GdipDisposeImage(self._bitmap)
if self._dc:
res = user32.ReleaseDC(0, self._dc)
except:
pass
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 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
FontStyleBold = 1
FontStyleItalic = 2
UnitPixel = 2
UnitPoint = 3
class GDIPlusFont(Win32Font):
glyph_renderer_class = GDIPlusGlyphRenderer
_private_fonts = None
_default_name = 'Arial'
def __init__(self, name, size, bold=False, italic=False, dpi=None):
if not name:
name = self._default_name
super(GDIPlusFont, self).__init__(name, size, bold, italic, dpi)
family = ctypes.c_void_p()
name = ctypes.c_wchar_p(name)
# Look in private collection first:
if self._private_fonts:
gdiplus.GdipCreateFontFamilyFromName(name,
self._private_fonts, ctypes.byref(family))
# Then in system collection:
if not family:
gdiplus.GdipCreateFontFamilyFromName(name,
None, ctypes.byref(family))
# Nothing found, use default font.
if not family:
name = self._default_name
gdiplus.GdipCreateFontFamilyFromName(ctypes.c_wchar_p(name),
None, ctypes.byref(family))
if dpi is None:
unit = UnitPoint
self.dpi = 96
else:
unit = UnitPixel
size = (size * dpi) // 72
self.dpi = dpi
style = 0
if bold:
style |= FontStyleBold
if italic:
style |= FontStyleItalic
self._gdipfont = ctypes.c_void_p()
gdiplus.GdipCreateFont(family, ctypes.c_float(size),
style, unit, ctypes.byref(self._gdipfont))
gdiplus.GdipDeleteFontFamily(family)
def __del__(self):
super(GDIPlusFont, self).__del__()
result = gdiplus.GdipDeleteFont(self._gdipfont)
@classmethod
def add_font_data(cls, data):
super(GDIPlusFont, cls).add_font_data(data)
if not cls._private_fonts:
cls._private_fonts = ctypes.c_void_p()
gdiplus.GdipNewPrivateFontCollection(
ctypes.byref(cls._private_fonts))
gdiplus.GdipPrivateAddMemoryFont(cls._private_fonts, data, len(data))
@classmethod
def have_font(cls, name):
family = ctypes.c_void_p()
# Look in private collection first:
num_count = ctypes.c_int()
gdiplus.GdipGetFontCollectionFamilyCount(
cls._private_fonts, ctypes.byref(num_count))
gpfamilies = (ctypes.c_void_p * num_count.value)()
numFound = ctypes.c_int()
gdiplus.GdipGetFontCollectionFamilyList(
cls._private_fonts, num_count, gpfamilies, ctypes.byref(numFound))
font_name = ctypes.create_unicode_buffer(32)
for gpfamily in gpfamilies:
gdiplus.GdipGetFamilyName(gpfamily, font_name, '\0')
if font_name.value == name:
return True
# Else call parent class for system fonts
return super(GDIPlusFont, cls).have_font(name)
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