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https://github.com/netsurf-browser/netsurf
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319 lines
12 KiB
Plaintext
319 lines
12 KiB
Plaintext
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Build Instructions for Framebuffer NetSurf 12 February 2009
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This document provides instructions for building the Framebuffer version of
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NetSurf and provides guidance on obtaining NetSurf's build dependencies.
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Framebuffer NetSurf has been tested on Ubuntu and Debian.
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Building and executing NetSurf
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=================================
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First of all, you should examine the contents of Makefile.defaults
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and enable and disable relevant features as you see fit in a
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Makefile.config file. Some of these options can be automatically
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detected and used, and where this is the case they are set to such.
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Others cannot be automatically detected from the Makefile, so you
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will either need to install the dependencies, or set them to NO.
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One option it is vitally important to set is the Framebuffer ports
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frontend type by setting the NETSURF_FB_FRONTEND variable. The port
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can run on a number of simple framebuffer implementations including
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the linux framebuffer and an SDL surface.
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You should then obtain NetSurf's dependencies, keeping in mind which options
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you have enabled in the configuration file. See the next section for
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specifics.
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Once done, to build Framebuffer NetSurf on a UNIX-like platform, simply run:
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$ make TARGET=framebuffer
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If that produces errors, you probably don't have some of NetSurf's build
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dependencies installed. See "Obtaining NetSurf's dependencies" below. Or turn
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off the complaining features in your Makefile.config. You may need to "make clean"
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before attempting to build after installing the dependencies.
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Run NetSurf by executing the "nsfb" shell script:
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$ ./nsfb
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This script makes it easy to run the nsfb binary from the build tree. It
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sets up some environment variables which enable NetSurf to find its
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resources.
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Selecting a frontend and appropriate options
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==============================================
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The framebuffer port can operate on a number of frontends. A
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frontend in this context is simply the combination of input and
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output devices. A frontend output device may be any linearly mapped
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area of memory. The framebuffer may be treated as values at 32, 16
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or 8 bits per pixel. The input device is typically selected to
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complement the output device and is completely specific to the
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frontend.
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There are several configuration options which may influence the
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framebuffer frontends. These are:
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fb_refresh - The refresh rate (for physical displays)
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fb_depth - The depth (in bits per pixel) of the framebuffer
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window_width - The width of the framebuffer
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window_height - The height of the framebuffer
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The defaults are for 800 by 600 pixels at 16bpp and 70Hz refresh rate.
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There are currently four frontends:
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linux Output to a Linux framebuffer and input from linux input
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event device nodes. The output device is specified with
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the fb_device option which defaults to /dev/fb0 . The
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input nodes are searched for in the path specified by the
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fb_input_devpath option which defaults to /dev/input/
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sdl The SDL frontend is a straightforward port to the SDL library
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which abstracts the input and output from the application and has
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been targeted to several operating systems.
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vnc The VNC server frontend uses the libvncserver library to
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provide a straightforward unsecured VNC server, multiple
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clients may connect.
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able Output to the Simtec ABLE bootloader framebuffer and input
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from its input device node.
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Fonts
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=======
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The framebuffer port currently has two choices for font
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handling. The font handler may be selected at compile time by using
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the NETSURF_FB_FONTLIB configuration key. Currently supported values
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are internal and freetype
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Internal
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----------
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The internal font system has a single built in monospaced face with
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CP467 encoding. The internal font plotter requires no additional
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resources and is very fast, it is also aesthetically unappealing.
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Freetype
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----------
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The freetype font system (freetype version 2 API is used) has
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support for a number of different font file formats and faces. The
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framebuffer font handler takes advantage of the freetype library
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caching system to give good performance.
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The font glyphs are, by default, rendered as 256 level transparency
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which gives excellent visual results even on small font sizes.
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The default font is the Vera trutype font set. The default path they
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are sourced from is /usr/share/fonts/truetype/ttf-bitstream-vera/ .
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The font selection may be changed by placing truetype font files
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in the resources path. The resource files will be the generic names
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sans_serif.ttf, sans_serif_bold.ttf etc. The selection may also be
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overridden by setting options.
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The font system is configured at runtime by several options. The
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fb_font_monochrome option causes the renderer to use monochrome
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glyph rendering which is faster but less visually appealing. The
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remaining seven options control the files to be used for font faces.
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fb_face_sans_serif - The sans serif face
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fb_face_sans_serif_bold - The bold sans serif face
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fb_face_sans_serif_italic - The italic sans serif face
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fb_face_sans_serif_italic_bold - The bold italic sans serif face.
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fb_face_monospace - The monospaced font
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fb_face_serif - The serif font
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fb_serif_bold - The bold serif font
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Old Freetype
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--------------
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The framebuffer port Freetype font implementation was constructed
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using a modern version of the library (2.3.5) to use versions 2.2.1
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and prior the following patch is necessary.
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Index: framebuffer/fb_font_freetype.c
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===================================================================
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--- framebuffer/fb_font_freetype.c (revision 6750)
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+++ framebuffer/fb_font_freetype.c (working copy)
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@@ -311,6 +311,7 @@
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FT_Glyph glyph;
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FT_Error error;
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fb_faceid_t *fb_face;
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+ FTC_ImageTypeRec trec;
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fb_fill_scalar(style, &srec);
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@@ -318,15 +319,24 @@
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glyph_index = FTC_CMapCache_Lookup(ft_cmap_cache, srec.face_id, fb_face->cidx, ucs4);
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- error = FTC_ImageCache_LookupScaler(ft_image_cache,
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- &srec,
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- FT_LOAD_RENDER |
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- FT_LOAD_FORCE_AUTOHINT |
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- ft_load_type,
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- glyph_index,
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- &glyph,
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- NULL);
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+ trec.face_id = srec.face_id;
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+ if (srec.pixel) {
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+ trec.width = srec.width;
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+ trec.height = srec.height;
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+ } else {
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+ /* Convert from 1/64 pts to pixels */
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+ trec.width = srec.width * css_screen_dpi / 64 / srec.x_res;
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+ trec.height = srec.height * css_screen_dpi / 64 / srec.y_res;
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+ }
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+ trec.flags = FT_LOAD_RENDER | FT_LOAD_FORCE_AUTOHINT | ft_load_type;
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+
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+ error = FTC_ImageCache_Lookup(ft_image_cache,
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+ &trec,
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+ glyph_index,
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+ &glyph,
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+ NULL);
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+
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return glyph;
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}
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Obtaining NetSurf's build dependencies
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========================================
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Many of NetSurf's dependencies are packaged on various operating systems.
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The remainder must be installed manually. Currently, some of the libraries
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developed as part of the NetSurf project have not had official releases.
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Hopefully they will soon be released with downloadable tarballs and packaged
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in common distros. For now, you'll have to make do with svn checkouts.
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Package installation
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----------------------
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Debian-like OS:
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$ apt-get install libglade2-dev libcurl3-dev libxml2-dev libmng-dev
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$ apt-get install librsvg2-dev lemon re2c
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Recent OS versions might need libcurl4-dev instead of libcurl3-dev but
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note that when it has not been built with OpenSSL, the SSL_CTX is not
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available and results that certification details won't be presented in case
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they are invalid. But as this is currently unimplemented in the Framebuffer
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flavour of NetSurf, this won't make a difference at all.
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Fedora:
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$ yum install libglade2-devel curl-devel libxml2-devel libmng-devel
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$ yum install librsvg2-devel lcms-devel re2c
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Other:
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You'll need to install re2c, a tool which builds the CSS lexer, and the
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development resources for libglade2, libcurl3, libxml2, libmng and librsvg.
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Note that if you don't require MNG or JNG image support, NetSurf can be
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configured to use libpng instead of libmng. If you wish to do this, install
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the libpng development package instead.
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Libnsbmp
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----------
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NetSurf has its own library for decoding and rendering BMPs, ICOs, etc.
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You can check it out from svn://svn.netsurf-browser.org/trunk/libnsbmp
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To build and install it:
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$ sudo make install
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Libnsgif
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----------
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NetSurf has its own library for decoding and rendering GIFs. You can check
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it out from svn://svn.netsurf-browser.org/trunk/libnsgif
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To build and install it:
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$ sudo make install
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Hubbub
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--------
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NetSurf can use Hubbub, the project's HTML parser, instead of using libxml2's
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HTML parser. To build this, you will also require libparserutils. Firstly,
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check out libparserutils from;
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svn://svn.netsurf-browser.org/trunk/libparserutils
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and do the usual "sudo make install". Once this is built and installed, you
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can check out and build Hubbub. Check out hubbub from;
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svn://svn.netsurf-browser.org/trunk/hubbub
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and again do the usual "sudo make install".
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Librosprite
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-------------
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NetSurf uses James Shaw's librosprite for rendering RISC OS Sprite
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files on non-RISC OS platforms. The Makefile will automatically use
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librosprite if it is installed. You can disable it entirely by
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creating a Makefile.config file.
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To build librosprite, check out from svn://svn.rjek.com/jshaw/libsprite/trunk
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Build and install it:
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$ sudo make install
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Optionally, specify an install prefix:
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$ PREFIX=/path/to/install make install
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Libhpdf
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---------
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NetSurf can use Haru PDF to enable PDF export and printing in GTK. This
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is currently enabled by default, and cannot be auto-detected by the Makefile.
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If you wish to disable it, do so by creating a Makefile.config file.
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Haru PDF can be obtained from http://libharu.org/, although we currently
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depend on features that none of the official released versions does have.
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The current development versions of libharu are fine and we anticipate
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the libharu 2.2 release will be fine for NetSurf usage.
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A recently taken snapshot of one of those libharu development versions can
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be found at:
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svn://svn.netsurf-browser.org/trunk/libharu
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Lemon
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-------
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If your distribution does not package 'lemon' (Fedora doesn't) then you'll
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need to download it and build it yourself. You may find it comes with the
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SQLite packages (SQLite's parser is built with lemon). If not, try this:
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$ mkdir -p /usr/local/share/lemon
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$ wget http://www.sqlite.org/cvstrac/getfile/sqlite/tool/lemon.c
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$ wget -O /usr/local/share/lemon/lempar.c http://www.sqlite.org/cvstrac/getfile/sqlite/tool/lempar.c
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$ sed -e's!lempar.c!/usr/local/share/lemon/lempar.c!' lemon.c > lem.c
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$ gcc -o /usr/local/bin/lemon lem.c
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General requirements
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----------------------
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Depending on the frontend selected the build may need specific
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libraries installed, e.g. the SDL port requires SDL1.2 or later
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Installing these libraries will often will pull in loads of things,
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like the PNG and JPEG libraries, colour management libraries, zlib,
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OpenSSL etc that NetSurf also depends on.
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