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package/imagemagick: add optional SVG support to host variant

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SVG can be regarded as the "source code" for assets, like logos or other
graphical elements.

However, SVG needs to be rendered, which requires an XML parser and an
SVG "parser/rendered". As such, it has various runtime impacts, like
bad performance or security. As such, SVG are often pre-rendered to the
required sizes/depths/resolutions into other format, such as PNG, at
build time.

While rsvg-convert (from host-librsvg) would allow the rendering, it
does not allow more complex tasks taht ImageMagick allows for:
compositing more than one image, 2D transforamtions (rotation, skew...).

Yet, SVG support in ImageMagick relies on librsvg, which adds quite a
few dependencies, and thus has a noticeable impact on the build time.

Add an option to allow concerned users to enable/disable SVG support
in ImageMagick.

Enabling SVG support relies on librsvg, which in turns relies on a few
additional packages that ImageMagick can also optionally use. So,
automatically enable the corresponding support as well.

Signed-off-by: "Yann E. MORIN" <yann.morin@orange.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Yann E. MORIN 2019-02-19 14:15:30 +01:00 committed by Thomas Petazzoni
parent 3971917210
commit 6a7a584b24
2 changed files with 36 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
package/imagemagick/Config.in.host
View file

@ -11,3 +11,16 @@ config BR2_PACKAGE_HOST_IMAGEMAGICK
Bézier curves.
http://www.imagemagick.org/
if BR2_PACKAGE_HOST_IMAGEMAGICK
config BR2_PACKAGE_HOST_IMAGEMAGICK_SVG
bool "SVG support"
help
Say 'y' here is you need ImageMagick tools (like convert)
to support SVG.
This is not enabled by default, as it brings quite a few
extra dependencies, and thus extra build time.
endif

28
package/imagemagick/imagemagick.mk
View file

@ -168,15 +168,10 @@ HOST_IMAGEMAGICK_CONF_OPTS = \
--without-x \
--without-bzlib \
--without-fftw \
--without-fontconfig \
--without-freetype \
--without-lcms \
--without-lzma \
--without-pango \
--without-rsvg \
--without-tiff \
--without-webp \
--without-xml \
--with-jpeg \
--with-png \
--with-zlib
@ -187,5 +182,28 @@ HOST_IMAGEMAGICK_DEPENDENCIES = \
host-pkgconf \
host-zlib
ifeq ($(BR2_PACKAGE_HOST_IMAGEMAGICK_SVG),y)
HOST_IMAGEMAGICK_DEPENDENCIES += \
host-fontconfig \
host-freetype \
host-librsvg \
host-libxml2 \
host-pango
HOST_IMAGEMAGICK_CONF_ENV += ac_cv_path_xml2_config=$(HOST_DIR)/bin/xml2-config
HOST_IMAGEMAGICK_CONF_OPTS += \
--with-fontconfig \
--with-freetype \
--with-pango \
--with-rsvg \
--with-xml
else
HOST_IMAGEMAGICK_CONF_OPTS += \
--without-fontconfig \
--without-freetype \
--without-pango \
--without-rsvg \
--without-xml
endif
$(eval $(autotools-package))
$(eval $(host-autotools-package))