561 lines
20 KiB
Python
561 lines
20 KiB
Python
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# ----------------------------------------------------------------------------
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# pyglet
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# Copyright (c) 2006-2008 Alex Holkner
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# Copyright (c) 2008-2020 pyglet contributors
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of pyglet nor the names of its
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# contributors may be used to endorse or promote products
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# derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ----------------------------------------------------------------------------
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# TODO Windows Vista: need to call SetProcessDPIAware? May affect GDI+ calls as well as font.
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import math
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from sys import byteorder
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import pyglet
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from pyglet.font import base
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from pyglet.font import win32query
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import pyglet.image
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from pyglet.libs.win32.constants import *
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from pyglet.libs.win32.types import *
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from pyglet.libs.win32 import _gdi32 as gdi32, _user32 as user32
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from pyglet.libs.win32 import _kernel32 as kernel32
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from pyglet.util import asbytes
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_debug_font = pyglet.options['debug_font']
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def str_ucs2(text):
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if byteorder == 'big':
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text = text.encode('utf_16_be')
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else:
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text = text.encode('utf_16_le') # explicit endian avoids BOM
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return create_string_buffer(text + '\0')
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_debug_dir = 'debug_font'
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def _debug_filename(base, extension):
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import os
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if not os.path.exists(_debug_dir):
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os.makedirs(_debug_dir)
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name = '%s-%%d.%%s' % os.path.join(_debug_dir, base)
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num = 1
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while os.path.exists(name % (num, extension)):
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num += 1
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return name % (num, extension)
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def _debug_image(image, name):
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filename = _debug_filename(name, 'png')
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image.save(filename)
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_debug('Saved image %r to %s' % (image, filename))
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_debug_logfile = None
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def _debug(msg):
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global _debug_logfile
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if not _debug_logfile:
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_debug_logfile = open(_debug_filename('log', 'txt'), 'wt')
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_debug_logfile.write(msg + '\n')
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class Win32GlyphRenderer(base.GlyphRenderer):
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def __init__(self, font):
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self._bitmap = None
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self._dc = None
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self._bitmap_rect = None
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super(Win32GlyphRenderer, self).__init__(font)
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self.font = font
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# Pessimistically round up width and height to 4 byte alignment
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width = font.max_glyph_width
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height = font.ascent - font.descent
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width = (width | 0x3) + 1
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height = (height | 0x3) + 1
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self._create_bitmap(width, height)
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gdi32.SelectObject(self._dc, self.font.hfont)
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def _create_bitmap(self, width, height):
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pass
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def render(self, text):
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raise NotImplementedError('abstract')
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class GDIGlyphRenderer(Win32GlyphRenderer):
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def __del__(self):
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try:
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if self._dc:
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gdi32.DeleteDC(self._dc)
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if self._bitmap:
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gdi32.DeleteObject(self._bitmap)
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except:
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pass
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def render(self, text):
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# Attempt to get ABC widths (only for TrueType)
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abc = ABC()
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if gdi32.GetCharABCWidthsW(self._dc,
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ord(text), ord(text), byref(abc)):
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width = abc.abcB
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lsb = abc.abcA
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advance = abc.abcA + abc.abcB + abc.abcC
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else:
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width_buf = c_int()
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gdi32.GetCharWidth32W(self._dc,
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ord(text), ord(text), byref(width_buf))
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width = width_buf.value
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lsb = 0
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advance = width
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# Can't get glyph-specific dimensions, use whole line-height.
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height = self._bitmap_height
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image = self._get_image(text, width, height, lsb)
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glyph = self.font.create_glyph(image)
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glyph.set_bearings(-self.font.descent, lsb, advance)
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if _debug_font:
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_debug('%r.render(%s)' % (self, text))
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_debug('abc.abcA = %r' % abc.abcA)
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_debug('abc.abcB = %r' % abc.abcB)
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_debug('abc.abcC = %r' % abc.abcC)
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_debug('width = %r' % width)
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_debug('height = %r' % height)
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_debug('lsb = %r' % lsb)
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_debug('advance = %r' % advance)
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_debug_image(image, 'glyph_%s' % text)
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_debug_image(self.font.textures[0], 'tex_%s' % text)
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return glyph
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def _get_image(self, text, width, height, lsb):
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# There's no such thing as a greyscale bitmap format in GDI. We can
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# create an 8-bit palette bitmap with 256 shades of grey, but
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# unfortunately antialiasing will not work on such a bitmap. So, we
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# use a 32-bit bitmap and use the red channel as OpenGL's alpha.
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gdi32.SelectObject(self._dc, self._bitmap)
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gdi32.SelectObject(self._dc, self.font.hfont)
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gdi32.SetBkColor(self._dc, 0x0)
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gdi32.SetTextColor(self._dc, 0x00ffffff)
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gdi32.SetBkMode(self._dc, OPAQUE)
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# Draw to DC
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user32.FillRect(self._dc, byref(self._bitmap_rect), self._black)
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gdi32.ExtTextOutA(self._dc, -lsb, 0, 0, None, text,
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len(text), None)
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gdi32.GdiFlush()
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# Create glyph object and copy bitmap data to texture
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image = pyglet.image.ImageData(width, height,
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'AXXX', self._bitmap_data, self._bitmap_rect.right * 4)
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return image
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def _create_bitmap(self, width, height):
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self._black = gdi32.GetStockObject(BLACK_BRUSH)
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self._white = gdi32.GetStockObject(WHITE_BRUSH)
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if self._dc:
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gdi32.ReleaseDC(self._dc)
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if self._bitmap:
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gdi32.DeleteObject(self._bitmap)
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pitch = width * 4
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data = POINTER(c_byte * (height * pitch))()
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info = BITMAPINFO()
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info.bmiHeader.biSize = sizeof(info.bmiHeader)
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info.bmiHeader.biWidth = width
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info.bmiHeader.biHeight = height
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info.bmiHeader.biPlanes = 1
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info.bmiHeader.biBitCount = 32
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info.bmiHeader.biCompression = BI_RGB
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self._dc = gdi32.CreateCompatibleDC(None)
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self._bitmap = gdi32.CreateDIBSection(None,
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byref(info), DIB_RGB_COLORS, byref(data), None,
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0)
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# Spookiness: the above line causes a "not enough storage" error,
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# even though that error cannot be generated according to docs,
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# and everything works fine anyway. Call SetLastError to clear it.
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kernel32.SetLastError(0)
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self._bitmap_data = data.contents
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self._bitmap_rect = RECT()
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self._bitmap_rect.left = 0
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self._bitmap_rect.right = width
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self._bitmap_rect.top = 0
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self._bitmap_rect.bottom = height
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self._bitmap_height = height
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if _debug_font:
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_debug('%r._create_dc(%d, %d)' % (self, width, height))
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_debug('_dc = %r' % self._dc)
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_debug('_bitmap = %r' % self._bitmap)
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_debug('pitch = %r' % pitch)
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_debug('info.bmiHeader.biSize = %r' % info.bmiHeader.biSize)
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class Win32Font(base.Font):
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glyph_renderer_class = GDIGlyphRenderer
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def __init__(self, name, size, bold=False, italic=False, dpi=None):
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super(Win32Font, self).__init__()
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self.logfont = self.get_logfont(name, size, bold, italic, dpi)
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self.hfont = gdi32.CreateFontIndirectA(byref(self.logfont))
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# Create a dummy DC for coordinate mapping
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dc = user32.GetDC(0)
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metrics = TEXTMETRIC()
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gdi32.SelectObject(dc, self.hfont)
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gdi32.GetTextMetricsA(dc, byref(metrics))
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self.ascent = metrics.tmAscent
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self.descent = -metrics.tmDescent
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self.max_glyph_width = metrics.tmMaxCharWidth
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user32.ReleaseDC(0, dc)
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def __del__(self):
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gdi32.DeleteObject(self.hfont)
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@staticmethod
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def get_logfont(name, size, bold, italic, dpi):
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# Create a dummy DC for coordinate mapping
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dc = user32.GetDC(0)
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if dpi is None:
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dpi = 96
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logpixelsy = dpi
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logfont = LOGFONT()
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# Conversion of point size to device pixels
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logfont.lfHeight = int(-size * logpixelsy // 72)
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if bold:
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logfont.lfWeight = FW_BOLD
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else:
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logfont.lfWeight = FW_NORMAL
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logfont.lfItalic = italic
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logfont.lfFaceName = asbytes(name)
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logfont.lfQuality = ANTIALIASED_QUALITY
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user32.ReleaseDC(0, dc)
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return logfont
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@classmethod
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def have_font(cls, name):
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# [ ] add support for loading raster fonts
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return win32query.have_font(name)
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@classmethod
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def add_font_data(cls, data):
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numfonts = c_uint32()
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gdi32.AddFontMemResourceEx(data, len(data), 0, byref(numfonts))
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# --- GDI+ font rendering ---
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from pyglet.image.codecs.gdiplus import PixelFormat32bppARGB, gdiplus, Rect
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from pyglet.image.codecs.gdiplus import ImageLockModeRead, BitmapData
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DriverStringOptionsCmapLookup = 1
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DriverStringOptionsRealizedAdvance = 4
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TextRenderingHintAntiAlias = 4
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TextRenderingHintAntiAliasGridFit = 3
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StringFormatFlagsDirectionRightToLeft = 0x00000001
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StringFormatFlagsDirectionVertical = 0x00000002
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StringFormatFlagsNoFitBlackBox = 0x00000004
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StringFormatFlagsDisplayFormatControl = 0x00000020
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StringFormatFlagsNoFontFallback = 0x00000400
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StringFormatFlagsMeasureTrailingSpaces = 0x00000800
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StringFormatFlagsNoWrap = 0x00001000
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StringFormatFlagsLineLimit = 0x00002000
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StringFormatFlagsNoClip = 0x00004000
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class Rectf(ctypes.Structure):
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_fields_ = [
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('x', ctypes.c_float),
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('y', ctypes.c_float),
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('width', ctypes.c_float),
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('height', ctypes.c_float),
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]
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class GDIPlusGlyphRenderer(Win32GlyphRenderer):
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def __del__(self):
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try:
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if self._matrix:
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res = gdiplus.GdipDeleteMatrix(self._matrix)
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if self._brush:
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res = gdiplus.GdipDeleteBrush(self._brush)
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if self._graphics:
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res = gdiplus.GdipDeleteGraphics(self._graphics)
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if self._bitmap:
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res = gdiplus.GdipDisposeImage(self._bitmap)
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if self._dc:
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res = user32.ReleaseDC(0, self._dc)
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except:
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pass
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def _create_bitmap(self, width, height):
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self._data = (ctypes.c_byte * (4 * width * height))()
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self._bitmap = ctypes.c_void_p()
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self._format = PixelFormat32bppARGB
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gdiplus.GdipCreateBitmapFromScan0(width, height, width * 4,
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self._format, self._data, ctypes.byref(self._bitmap))
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self._graphics = ctypes.c_void_p()
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gdiplus.GdipGetImageGraphicsContext(self._bitmap,
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ctypes.byref(self._graphics))
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gdiplus.GdipSetPageUnit(self._graphics, UnitPixel)
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self._dc = user32.GetDC(0)
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gdi32.SelectObject(self._dc, self.font.hfont)
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gdiplus.GdipSetTextRenderingHint(self._graphics,
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TextRenderingHintAntiAliasGridFit)
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self._brush = ctypes.c_void_p()
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gdiplus.GdipCreateSolidFill(0xffffffff, ctypes.byref(self._brush))
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self._matrix = ctypes.c_void_p()
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gdiplus.GdipCreateMatrix(ctypes.byref(self._matrix))
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self._flags = (DriverStringOptionsCmapLookup |
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DriverStringOptionsRealizedAdvance)
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self._rect = Rect(0, 0, width, height)
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self._bitmap_height = height
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def render(self, text):
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ch = ctypes.create_unicode_buffer(text)
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len_ch = len(text)
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# 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)
|