mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2025-12-20 12:50:10 +01:00
571a27b4fc
This adds a new GPU accelerated backend for Cairo based on the Cogl 3D graphics API. This backend aims to support Cairo in a way that translates as naturally as possible to using a GPU, it does not strive to compete with the anti-aliasing quality of the image backend if it can't be done efficiently using the GPU - raw performance isn't the only metric of concern, so is power usage. As an overview of how the backend works: - fills are handled by tessellating paths into triangles - the backend has an extra fill_rectangle drawing operation so we have a fast-path for drawing rectangles which are so common. - strokes are also tessellated into triangles. - stroke and fill tessellations are cached to avoid the cpu overhead of tessellation and cost of upload given that its common for apps to re-draw the same path multiple times. The tessellations can survive translations and rotations increasing the probability that they can be re-used. - sources and masks are handled using multi-texturing. - clipping is handled with a scissor and the stencil buffer which we're careful to only update when they really change. - linear gradients are rendered to a 1d texture using a triangle strip + interpolating color attributes. All cairo extend modes are handled by corresponding texture sampler wrap modes without needing programmable fragment processing. - antialiasing should be handled using Cogl's multisampling API XXX: This is a work in progress!! TODO: - handle at least basic radial gradients (No need to handle full pdf semantics, since css, svg and canvas only allow radial gradients defined as one circle + a point that must lie within the first circle.) - currently we fall back to pixman for radial gradients. - support glyph rendering with a decent glyph cache design. The current plan is a per scaled-font growable cache texture + a scratch cache for one-shot/short-lived glyphs. - decide how to handle npot textures when lacking hardware support. Current plan is to add a transparent border to npot textures and use CLAMP_TO_EDGE for the default EXTEND_NONE semantics. For anything else we can allocate a shadow npot texture and scale the original to fit that so we can map extend modes to texture sampler modes.
427 lines
14 KiB
Text
427 lines
14 KiB
Text
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dnl
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dnl Define macros to enable various features.
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dnl - Macro: CAIRO_ENABLE_* (ID, NAME, DEFAULT, COMMANDS)
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dnl
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dnl where:
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dnl
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dnl ID is the feature id, eg. "ft" for cairo_ft_...
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dnl NAME is the human-readable name of the feature, eg. "FreeType"
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dnl DEFAULT is the default state of the feature:
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dnl "no" for experimental backends, eg. your favorite new backend
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dnl "yes" for mandatory backends, eg. png
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dnl "auto" for other supported backends, eg. xlib
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dnl COMMANDS are run to check whether the feature can be enabled. Their
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dnl result may be cached, so user should not count on them being run.
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dnl They should set use_$(ID) to something other than yes if the
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dnl feature cannot be built, eg. "no (requires SomeThing)". It then
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dnl should also set $(ID)_REQUIRES/CFLAGS/LIBS/...
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dnl appropriately. Look at the macro definition for more details,
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dnl or ask if in doubt.
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dnl
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AC_DEFUN([CAIRO_ENABLE],
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[_CAIRO_ENABLE([$1], [$2], , [$3],[$4])])dnl
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AC_DEFUN([CAIRO_ENABLE_SURFACE_BACKEND],
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[_CAIRO_ENABLE([$1], [$2 surface backend], surface, [$3],[$4])])dnl
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AC_DEFUN([CAIRO_ENABLE_FONT_BACKEND],
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[_CAIRO_ENABLE([$1], [$2 font backend], font, [$3],[$4])])dnl
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AC_DEFUN([CAIRO_ENABLE_FUNCTIONS],
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[_CAIRO_ENABLE([$1], [$2 functions], functions, [$3],[$4])])dnl
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dnl
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dnl Define cr_feature_pc and friends ala other cr_feature_* macros
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dnl
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m4_define([cr_pc_modname],
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[[cairo-]m4_translit([$1],_,-)])dnl
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m4_define([cr_feature_pc],
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[cr_pc_modname(cr_feature)[.pc]])dnl
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m4_define([cr_feature_uninstalled_pc],
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[cr_pc_modname(cr_feature)[-uninstalled.pc]])dnl
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dnl ===========================================================================
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dnl
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dnl Hooks
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dnl
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dnl ===========================================================================
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dnl ===========================================================================
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dnl
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dnl Generate {src,boilerplate}/Makefile.{am,win32}.config
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dnl
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CAIRO_INIT_MAKEFILES([build])
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CAIRO_CONFIG_MAKEFILE([cairo], [src])dnl
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CAIRO_CONFIG_MAKEFILE([cairo_boilerplate], [boilerplate])dnl
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CAIRO_MAKEFILE_INCLUDE(*,[Makefile.sources])dnl
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dnl An empty line per feature for readability
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE(*,*,*,*,[])dnl
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dnl Collect list of all supported public headers
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CAIRO_MAKEFILE_ACCUMULATE(*,
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[supported_$1_headers = $($1_headers)]dnl
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)dnl
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE(*,*,!no,!,
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[supported_$1_headers += $($1_$2_headers)]dnl
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)dnl
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dnl Collect list of all unsupported public headers
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CAIRO_MAKEFILE_ACCUMULATE(*,
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[unsupported_$1_headers =]dnl
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)dnl
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE(*,*,no,!,
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[unsupported_$1_headers += $($1_$2_headers)]dnl
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)dnl
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dnl Collect list of source files for all public features
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CAIRO_MAKEFILE_ACCUMULATE(*,
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[dnl
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all_$1_headers = $($1_headers)
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all_$1_private = $($1_private)
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all_$1_cxx_sources = $($1_cxx_sources)
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all_$1_sources = $($1_sources)
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])dnl
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE(*,*,*,!,
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[dnl
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all_$1_headers += $($1_$2_headers)
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all_$1_private += $($1_$2_private)
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all_$1_cxx_sources += $($1_$2_cxx_sources)
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all_$1_sources += $($1_$2_sources)]dnl
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)dnl
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dnl Collect list of source files for enabled public features
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CAIRO_MAKEFILE_ACCUMULATE(*,
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[dnl
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enabled_$1_headers = $($1_headers)
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enabled_$1_private = $($1_private)
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enabled_$1_cxx_sources = $($1_cxx_sources)
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enabled_$1_sources = $($1_sources)
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])dnl
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE(*,yes,*,!,
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[dnl
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enabled_$1_headers += $($1_$2_headers)
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enabled_$1_private += $($1_$2_private)
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enabled_$1_cxx_sources += $($1_$2_cxx_sources)
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enabled_$1_sources += $($1_$2_sources)]dnl
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)dnl
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dnl No public headers for private features
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dnl Collect list of source files for all private features
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE(*,*,*,,
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[dnl
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all_$1_private += $($1_$2_private) $($1_$2_headers)
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all_$1_cxx_sources += $($1_$2_cxx_sources)
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all_$1_sources += $($1_$2_sources)]dnl
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)dnl
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dnl Collect list of source files for enabled private features
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE(*,yes,*,,
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[dnl
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enabled_$1_private += $($1_$2_private) $($1_$2_headers)
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enabled_$1_cxx_sources += $($1_$2_cxx_sources)
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enabled_$1_sources += $($1_$2_sources)]dnl
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)dnl
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dnl ===========================================================================
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dnl
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dnl Generate .pc files
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dnl
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dnl All .pc files are generated automatically except for this one
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AC_CONFIG_FILES([src/cairo.pc])dnl
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AC_CONFIG_FILES([cairo-uninstalled.pc:src/cairo-uninstalled.pc.in])dnl
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dnl pkg-config requires, non-pkgconfig cflags and libs, and total cflags and libs
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CAIRO_FEATURE_VARS_REGISTER([BASE],[cairo])dnl
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CAIRO_ACCUMULATED_FEATURE_VARS_REGISTER([REQUIRES],,[ ])dnl
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CAIRO_ACCUMULATED_FEATURE_VARS_REGISTER([CFLAGS NONPKGCONFIG_CFLAGS],,[ ])dnl
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CAIRO_ACCUMULATED_FEATURE_VARS_REGISTER([LIBS NONPKGCONFIG_LIBS],,[ ],[$LIBS])dnl
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CAIRO_FEATURE_VARS_REGISTER([NONPKGCONFIG_EXTRA_LIBS])dnl
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AC_SUBST(CAIRO_REQUIRES)dnl
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AC_SUBST(CAIRO_CFLAGS)dnl
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AC_SUBST(CAIRO_LDFLAGS)dnl
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AC_SUBST(CAIRO_NONPKGCONFIG_CFLAGS)dnl
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AC_SUBST(CAIRO_LIBS)dnl
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AC_SUBST(CAIRO_NONPKGCONFIG_LIBS)dnl
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dnl add non-pkgconfig values
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AC_CONFIG_COMMANDS_PRE(
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[dnl
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CAIRO_CFLAGS="$CAIRO_CFLAGS $CAIRO_NONPKGCONFIG_CFLAGS"
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CAIRO_LIBS="$CAIRO_LIBS $CAIRO_NONPKGCONFIG_LIBS"
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])dnl
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m4_define([_CAIRO_FEATURE_CONFIG_PKGCONFIG_FILE],
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[dnl
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AC_CONFIG_FILES([$3:$4],
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[dnl
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mv "$3" "$3.tmp" &&
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$SED "dnl
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s%@FEATURE_PC@%]cr_pc_modname([$1])[%g;dnl
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s%@FEATURE_NAME@%$2%g;dnl
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s%@FEATURE_BASE@%$$1_BASE%g;dnl
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s%@FEATURE_REQUIRES@%$$1_REQUIRES%g;dnl
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s%@FEATURE_NONPKGCONFIG_LIBS@%$$1_NONPKGCONFIG_LIBS%g;dnl
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s%@FEATURE_NONPKGCONFIG_EXTRA_LIBS@%$$1_NONPKGCONFIG_EXTRA_LIBS%g;dnl
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s%@FEATURE_NONPKGCONFIG_CFLAGS@%$$1_NONPKGCONFIG_CFLAGS%g;dnl
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" < "$3.tmp" > "$3" && rm -f "$3.tmp" ||
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AC_MSG_ERROR(failed to update $3)
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],[dnl
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SED='$SED'
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$1_BASE='$$1_BASE'
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$1_REQUIRES='$$1_REQUIRES'
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$1_NONPKGCONFIG_LIBS='$$1_NONPKGCONFIG_LIBS'
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$1_NONPKGCONFIG_EXTRA_LIBS='$$1_NONPKGCONFIG_EXTRA_LIBS'
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$1_NONPKGCONFIG_CFLAGS='$$1_NONPKGCONFIG_CFLAGS'
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])dnl
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])dnl
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dnl Generate .pc files for enabled non-builtin public features
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CAIRO_FEATURE_HOOK_REGISTER(yes,!always,!,
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[dnl
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_CAIRO_FEATURE_CONFIG_PKGCONFIG_FILE(
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[$1],
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cr_feature_name,
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[src/]cr_feature_pc,
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[src/cairo-features.pc.in]
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)dnl
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])dnl
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dnl Generate -uninstalled.pc files for enabled non-builtin public features
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CAIRO_FEATURE_HOOK_REGISTER(yes,!always,!,
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[dnl
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_CAIRO_FEATURE_CONFIG_PKGCONFIG_FILE(
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[$1],
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cr_feature_name,
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cr_feature_uninstalled_pc,
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[src/cairo-features-uninstalled.pc.in]
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)dnl
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])dnl
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dnl Collect list of .pc files for all non-builtin public features
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CAIRO_MAKEFILE_ACCUMULATE(cairo,
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[all_$1_pkgconf = cairo.pc])dnl
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE(cairo,*,!always,!,
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[all_$1_pkgconf += cr_feature_pc])dnl
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dnl Collect list of .pc files for enabled non-builtin public features
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CAIRO_MAKEFILE_ACCUMULATE(cairo,
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[enabled_$1_pkgconf = cairo.pc])dnl
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE(cairo,yes,!always,!,
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[enabled_$1_pkgconf += cr_feature_pc])dnl
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dnl ===========================================================================
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dnl
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dnl Generate src/cairo-features.h, src/cairo-supported-features.h, and
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dnl src/cairo-features-win32.h
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dnl
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dnl Collect list of enabled public features
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CAIRO_ACCUMULATORS_REGISTER(FEATURES,[ ])dnl
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CAIRO_FEATURE_HOOK_REGISTER(yes,*,!,dnl
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[dnl
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CAIRO_ACCUMULATE(FEATURES, cr_feature_tag)dnl
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])dnl
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dnl Collect list of all supported public features
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CAIRO_ACCUMULATORS_REGISTER(SUPPORTED_FEATURES,[ ])dnl
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CAIRO_FEATURE_HOOK_REGISTER(*,!no,!,dnl
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[dnl
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CAIRO_ACCUMULATE(SUPPORTED_FEATURES, cr_feature_tag)
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])dnl
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dnl Collect list of all supported disabled public features
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CAIRO_ACCUMULATORS_REGISTER(NO_FEATURES,[ ])dnl
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CAIRO_FEATURE_HOOK_REGISTER(no,!no,!,
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[dnl
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CAIRO_ACCUMULATE(NO_FEATURES, cr_feature_tag)
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])dnl
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dnl Generate src/cairo-features.h
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CAIRO_CONFIG_COMMANDS([src/cairo-features.h],
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[dnl
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echo '/* Generated by configure. Do not edit. */'
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echo '#ifndef CAIRO_FEATURES_H'
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echo '#define CAIRO_FEATURES_H'
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echo ''
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for FEATURE in $CAIRO_FEATURES; do
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echo "#define $FEATURE 1"
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done | LANG=C sort
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echo ''
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for FEATURE in $CAIRO_NO_FEATURES; do
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echo "/*#undef $FEATURE */"
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done | LANG=C sort
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echo ''
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echo '#endif'
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],[dnl
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CAIRO_FEATURES='$CAIRO_FEATURES'
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CAIRO_NO_FEATURES='$CAIRO_NO_FEATURES'
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])dnl
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dnl Generate src/cairo-supported-features.h
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CAIRO_CONFIG_COMMANDS([src/cairo-supported-features.h],
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[dnl
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echo '/* Generated by configure. Do not edit. */'
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echo '#ifndef CAIRO_SUPPORTED_FEATURES_H'
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echo '#define CAIRO_SUPPORTED_FEATURES_H'
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echo ''
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echo '/* This is a dummy header, to trick gtk-doc only */'
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echo ''
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for FEATURE in $CAIRO_SUPPORTED_FEATURES; do
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echo "#define $FEATURE 1"
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done
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echo ''
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echo '#endif'
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],[dnl
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CAIRO_SUPPORTED_FEATURES='$CAIRO_SUPPORTED_FEATURES'
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])dnl
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dnl For enabled private features just define them in config.h. No fanfare!
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CAIRO_FEATURE_HOOK_REGISTER(yes,*,,
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[dnl
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AC_DEFINE(cr_feature_tag, 1, [Define to 1 to enable cairo's ]cr_feature_name[ feature])
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])dnl
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dnl Generate build/Makefile.win32.features-h that generates src/cairo-features.h
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CAIRO_CONFIG_MAKEFILE_PRIVATE_WIN32([win32_features_h],[build],[features-h])
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dnl
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CAIRO_MAKEFILE_ACCUMULATE([win32_features_h],
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[$(top_srcdir)/src/cairo-features.h: $(top_srcdir)/build/Makefile.win32.features
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@echo "Generating src/cairo-features.h"
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@echo "/* Generated by Makefile.win32.features-h. Do not edit. */" > $(top_srcdir)/src/cairo-features.h
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@echo "[#]ifndef CAIRO_FEATURES_H" >> $(top_srcdir)/src/cairo-features.h
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@echo "[#]define CAIRO_FEATURES_H 1" >> $(top_srcdir)/src/cairo-features.h]dnl
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)
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AC_CONFIG_COMMANDS_PRE(
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[dnl
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CAIRO_MAKEFILE_ACCUMULATE([win32_features_h], [ @echo "[#]endif" >> $(top_srcdir)/src/cairo-features.h])
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])dnl
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CAIRO_MAKEFILE_ACCUMULATE_FEATURE([win32_features_h],yes,*,*,dnl
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[ @echo "[#]define cr_feature_tag 1" >> $(top_srcdir)/src/cairo-features.h]dnl
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)dnl
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dnl ===========================================================================
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dnl
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dnl Report
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dnl
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CAIRO_ACCUMULATORS_REGISTER([WARNING_MESSAGE],m4_newline()m4_newline)dnl
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dnl Collect warning message for enabled unsupported public features
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CAIRO_FEATURE_HOOK_REGISTER(yes,no,!,
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[dnl
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CAIRO_ACCUMULATE([WARNING_MESSAGE], CAIRO_TEXT_WRAP([The ]cr_feature_name[ feature is still under active development and is included in this release only as a preview. It does NOT fully work yet and incompatible changes may yet be made to ]cr_feature_name[ specific API.], [--- ]))
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])dnl
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dnl Collect warning message for disabled recommended features
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CAIRO_FEATURE_HOOK_REGISTER(no,yes,*,
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[dnl
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CAIRO_ACCUMULATE([WARNING_MESSAGE], CAIRO_TEXT_WRAP([It is strongly recommended that you do NOT disable the ]cr_feature_name[ feature.], [+++ ]))
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])dnl
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dnl Collect enabled native surface/font backend features
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CAIRO_ACCUMULATORS_REGISTER([NATIVE_SURFACE_BACKENDS])dnl
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CAIRO_ACCUMULATORS_REGISTER([NATIVE_FONT_BACKENDS])dnl
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CAIRO_FEATURE_HOOK_REGISTER(yes,auto,surface,
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[dnl
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CAIRO_ACCUMULATE([NATIVE_SURFACE_BACKENDS], [$1])
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])dnl
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CAIRO_FEATURE_HOOK_REGISTER(yes,auto,font,
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[dnl
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CAIRO_ACCUMULATE([NATIVE_FONT_BACKENDS], [$1])
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])dnl
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dnl Collect warning message if no native surface/font backend feature enabled
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AC_CONFIG_COMMANDS_PRE(dnl
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[dnl
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AS_IF([test -z "$CAIRO_NATIVE_SURFACE_BACKENDS"],dnl
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[dnl
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CAIRO_ACCUMULATE([WARNING_MESSAGE], CAIRO_TEXT_WRAP([No native surface backends enabled for your platform. It is strongly recommended that you enable the native surface backend feature for your platform.], [*** ]))
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])
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AS_IF([test -z "$CAIRO_NATIVE_FONT_BACKENDS"],dnl
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[dnl
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CAIRO_ACCUMULATE([WARNING_MESSAGE], CAIRO_TEXT_WRAP([No native font backends enabled for your platform. It is strongly recommended that you enable the native font backend feature for your platform.], [*** ]))
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])
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])dnl
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AC_DEFUN([CAIRO_REPORT],
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[dnl
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V="$CAIRO_VERSION_MAJOR.$CAIRO_VERSION_MINOR.$CAIRO_VERSION_MICRO"
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echo ""
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echo "cairo (version $V [[$CAIRO_RELEASE_STATUS]]) will be compiled with:"
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echo ""
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echo "The following surface backends:"
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echo " Image: yes (always builtin)"
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echo " Recording: yes (always builtin)"
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echo " Observer: yes (always builtin)"
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echo " Mime: yes (always builtin)"
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echo " Tee: $use_tee"
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echo " XML: $use_xml"
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echo " Skia: $use_skia"
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echo " Xlib: $use_xlib"
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echo " Xlib Xrender: $use_xlib_xrender"
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echo " Qt: $use_qt"
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echo " Quartz: $use_quartz"
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echo " Quartz-image: $use_quartz_image"
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echo " XCB: $use_xcb"
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echo " Win32: $use_win32"
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echo " OS2: $use_os2"
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echo " CairoScript: $use_script"
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echo " PostScript: $use_ps"
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echo " PDF: $use_pdf"
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echo " SVG: $use_svg"
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echo " OpenGL: $use_gl"
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echo " OpenGL ES 2.0: $use_glesv2"
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echo " BeOS: $use_beos"
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echo " DirectFB: $use_directfb"
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echo " OpenVG: $use_vg"
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echo " DRM: $use_drm"
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echo " Cogl: $use_cogl"
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echo ""
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echo "The following font backends:"
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echo " User: yes (always builtin)"
|
|
echo " FreeType: $use_ft"
|
|
echo " Fontconfig: $use_fc"
|
|
echo " Win32: $use_win32_font"
|
|
echo " Quartz: $use_quartz_font"
|
|
echo ""
|
|
echo "The following functions:"
|
|
echo " PNG functions: $use_png"
|
|
echo " GLX functions: $use_glx"
|
|
echo " WGL functions: $use_wgl"
|
|
echo " EGL functions: $use_egl"
|
|
echo " X11-xcb functions: $use_xlib_xcb"
|
|
echo " XCB-shm functions: $use_xcb_shm"
|
|
echo ""
|
|
echo "The following features and utilities:"
|
|
echo " cairo-trace: $use_trace"
|
|
echo " cairo-script-interpreter: $use_interpreter"
|
|
echo ""
|
|
echo "And the following internal features:"
|
|
echo " pthread: $use_pthread"
|
|
echo " gtk-doc: $enable_gtk_doc"
|
|
echo " gcov support: $use_gcov"
|
|
echo " symbol-lookup: $use_symbol_lookup"
|
|
echo " test surfaces: $use_test_surfaces"
|
|
echo " ps testing: $test_ps"
|
|
echo " pdf testing: $test_pdf"
|
|
echo " svg testing: $test_svg"
|
|
if test x"$use_win32" = "xyes"; then
|
|
echo " win32 printing testing: $test_win32_printing"
|
|
fi
|
|
echo "$CAIRO_WARNING_MESSAGE"
|
|
echo ""
|
|
])dnl
|
|
|