Drop some unused or dead code

See merge request !443

This is no-op as the functions always return TRUE and the code is never
executed.

../test/cairo-test-runner.c:730:48: warning: parameter 'str' set but not used [-Wunused-but-set-parameter]
_has_required_ghostscript_version (const char *str)

warning: equality comparison with extraneous parentheses [-Wparentheses-equality]

tee: Fix cairo wrapper functions

Closes #634

See merge request !442

Though I'm not sure how useful this tool is.

Follow-up to !391 to apply the same changes to the (disabled by default)
tee surface.

Fixes: #634

Win32 surface compositor should support DWrite font

Closes #597

See merge request !441

PDF Type 3 color fonts

See merge request !434

meson: Replace existing link if it already exists

Closes #631

See merge request !440

Fix build with -DDEBUG_SVG_RENDER

See merge request !439

Cairo 1.17.8 snapshot

See merge request !436

And clean it up a little bit.

Cairo is perfect, and has no known issues outside of the ones that are
listed in the issue tracker.

It's been nearly 20 years; time to let it go.

Port to Markdown.

Mainly drop the Autotools-related stuff, and use Markdown.

We're using an EOL version of GTK; we know we are using deprecated API.

Until somebody shows up with a replacement, or until we drop the perf
widget, we should avoid unnecessary compiler warnings.

While it's possible to write C code in Python, it's better to actually
write Python code in Python.

Use regular expressions, instead of counting characters, to allow a
little bit more leeway when editing the cairo-version.h header file.

Use a context manager to handle the lifetime of a file object.

Use f-strings instead of the obsolete format() method.

_cairo_win32_gdi_compositor_glyphs was falling back to the default
implementation for DWrite font because check_glyphs() returned FALSE
for CAIRO_FONT_TYPE_DWRITE.

Fixes #597

DWrite: Added new API to set measuring mode and rendering params

See merge request !423

GetGdiCompatibleMetrics may return a glyph metrics that yields a small
nagative glyph height. But, it was calculated in unsigned integer.
And, it resulted in a very large glyph metrics.

Calculate glyph width and height in signed integer and let them
non-negative.

Added the following API:
* cairo_dwrite_font_face_get_measuring_mode
* cairo_dwrite_font_face_get_rendering_params
* cairo_dwrite_font_face_set_measuring_mode
* cairo_dwrite_font_face_set_rendering_params

Removed the following functions:
* cairo_dwrite_get_cleartype_rendering_mode
* cairo_dwrite_set_cleartype_params
* cairo_dwrite_scaled_font_get_force_GDI_classic
* cairo_dwrite_scaled_font_set_force_GDI_classic

Fixes #631

Add cairo-dwrite.h header file

See merge request !425

s/the the/the/

See merge request !438

Fix dwrite crash when printing dwrite toy font

Closes #632

See merge request !435

Fixes #632

This implements Type 3 color fonts for PDF for any font with a
CAIRO_SCALED_GLYPH_INFO_RECORDING_SURFACE. This includes user-fonts,
SVG fonts, and COLR fonts.

Glyphs with foreground colors are not yet implemented as Type 3 glyphs
and will be rendered as images by cairo-surface.

Drop cairo-gl

See merge request !287

Add missing documentation

See merge request !433

Documentation updates

See merge request !431