269 lines
9.2 KiB
Python
269 lines
9.2 KiB
Python
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FreeType 2 compilation how-to
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=============================
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Introduction
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------------
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Welcome to the FreeType 2 library. You'll find in this document
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instructions on how to compile the library on your favorite platform.
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I. QUICK COMMAND-LINE GUIDE
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---------------------------
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Install GNU Make, then try the following on Unix or any system with
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gcc:
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make // this will setup the build
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make // this will build the library
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On Win32 + Visual C++:
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make setup visualc // setup the build for VisualC++ on Win32
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make // build the library
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Then, go to the `demos' directory and type
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make
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Note that on Unix, the first `make' invocation will run a configure
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script (which is located in `freetype2/builds/unix/'. You can also
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pass parameters to this script with the CFG variable, as in:
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make CFG="--prefix=/usr/local"
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make
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If this doesn't work, read the following.
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II. COMMAND-LINE COMPILATION
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----------------------------
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Note that if you do not want to compile FreeType 2 from a command
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line shell, please skip to section III below (DETAILED COMPILATION).
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FreeType 2 includes a powerful and flexible build system that allows
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you to easily compile it on a great variety of platforms from the
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command line. To do so, just follow these simple instructions:
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a. Install GNU Make
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Because GNU Make is the only Make tool supported to compile
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FreeType 2, you should install it on your machine.
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The FreeType 2 build system relies on many features special to GNU
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Make -- trying to build the library with any other Make tool will
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*fail*.
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Make sure that you are invoking GNU Make from the command line, by
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typing something like:
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make -v
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to display its version number.
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b. Invoke `make'
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Go to the root directory of FreeType 2, then simply invoke GNU
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Make from the command line. This will launch the FreeType 2 host
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platform detection routines. A summary will be displayed, for
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example, on Win32:
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==============================================================
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FreeType build system -- automatic system detection
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The following settings are used:
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platform win32
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compiler gcc
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configuration directory ./builds/win32
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configuration rules ./builds/win32/w32-gcc.mk
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If this does not correspond to your system or settings please
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remove the file 'config.mk' from this directory then read the
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INSTALL file for help.
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Otherwise, simply type 'make' again to build the library.
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=============================================================
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If the detected settings correspond to your platform and compiler,
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skip to step e. Note that if your platform is completely alien to
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the build system, the detected platform will be `ansi'.
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c. Configure the build system for a different compiler
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If the build system correctly detected your platform, but you want
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to use a different compiler than the one specified in the summary
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(for most platforms, gcc is the defaut compiler), invoke GNU Make
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with
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make setup <compiler>
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For example:
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to use Visual C++ on Win32, type: "make setup visualc"
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to use LCC-Win32 on Win32, type: "make setup lcc"
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The <compiler> name to use is platform-dependent. The list of
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available compilers for your system is available in the file
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`builds/<system>/detect.mk' (note that we hope to make the list
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displayed at user demand in the final release).
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If you are satisfied by the new configuration summary, skip to
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step e.
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d. Configure the build system for an unknown platform/compiler
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The auto-detection/setup phase of the build system copies a file
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to the current directory under the name `config.mk'.
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For example, on OS/2+gcc, it would simply copy
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`builds/os2/os2-gcc.mk' to `./config.mk'.
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If for some reason your platform isn't correctly detected, copy
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manually the configuration sub-makefile to `./config.mk' and go to
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step e.
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Note that this file is a sub-Makefile used to specify Make
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variables for compiler and linker invocation during the build.
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You can easily create your own version from one of the existing
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configuration files, then copy it to the current directory under
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the name `./config.mk'.
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e. Build the library
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The auto-detection/setup phase should have copied a file in the
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current directory, called `./config.mk'. This file contains
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definitions of various Make variables used to invoke the compiler
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and linker during the build.
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To launch the build, simply invoke GNU Make again: The top
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Makefile will detect the configuration file and run the build with
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it.
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f. Build the demonstration programs
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III. DETAILED COMPILATION PROCEDURE
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-----------------------------------
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If you don't want to compile FreeType 2 from the command-line (for
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example if you use a graphical IDE on a Mac or Windows), you will
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need to understand how the FreeType files are organized.
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FreeType 2 has a very modular design, and it is made of several
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components. Each component must be compiled as a stand-alone object
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file, even if it is really made of several C source files. For
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example, the `base layer' component is made of the following C
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files:
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src/
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base/
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ftcalc.c - computations
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ftextend.c - extensions support
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ftlist.c - simple list management
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ftobjs.c - object management
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ftoutln.c - simple outline processing
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ftstream.c - stream input
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However, you can create a single object file by compiling the file
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`src/base/ftbase.c', which basically contains
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#include <base/ftcalc.c>
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#include <base/ftobjs.c>
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#include <base/ftstream.c>
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#include <base/ftlist.c>
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#include <base/ftoutln.c>
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#include <base/ftextend.c>
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Similarly, each component has a single `englobing' C file to compile
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it as a stand-alone object:
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src/autohint/autohint.c - the autohinting module
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src/base/ftbase.c - the base layer, high-level interface
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src/cache/ftcache.c - a glyph and image caching system
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(still experimental)
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src/cff/cff.c - the OpenType font driver
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src/cid/type1cid.c - the CID-keyed font driver
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src/psaux/psaux.c - the PS support module
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src/psnames/psnames.c - a support module to handle PS glyph
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names
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src/raster1/raster1.c - the monochrome raster module
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src/sfnt/sfnt.c - the `sfnt' module
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src/smooth/smooth.c - the anti-aliasing raster module
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src/truetype/truetype.c - the TrueType font driver
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src/type1/type1.c - the Type 1 font driver
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The last module of FreeType 2, winfonts (implementing support for
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Windows FNT format), is a single file.
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To compile one component, do the following:
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- Add the top-level `include' directory to your compilation
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include path
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- Add the `src' directory to your compilation include path.
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- Compile the component `source' file (see list below); you don't
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need to be in the component's directory.
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For example, the following line can be used to compile the truetype
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driver on Unix:
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cd freetype2/
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cc -c -Iinclude -Isrc src/truetype/truetype.c
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Alternatively:
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cd freetype2/src/truetype
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cc -c -I../../include -I.. truetype.c
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Finally, FreeType 2 contains some other components:
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src/base/ftsystem.c - system-specific memory and i/o support
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src/base/ftinit.c - initialization layer
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src/base/ftdebug.c - debugging component (empty in release
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build)
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src/base/ftglyph.c - optional convenience functions
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All font drivers are optional. The `sfnt', `psaux', and `psnames'
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modules are mandatory for certain drivers. However, you may need to
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update the list of drivers that are statically linked to the
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library, which is located in the configuration file
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`include/freetype/config/ftmodule.h'.
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IV. Support for flat-directory compilation
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------------------------------------------
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It is now possible to put all FreeType 2 source files into a single
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directory, with the exception of the `include' hierarchy.
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Note that you still need to only compile the `wrapper' sources
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described above. Define the `FT_FLAT_COMPILE' macro when
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compiling. Here an example:
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1. Copy all files in current directory:
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cp freetype2/src/base/*.[hc] .
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cp freetype2/src/raster1/*.[hc] .
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cp freetype2/src/smooth/*.[hc] .
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etc.
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2. Compile sources:
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cc -c -DFT_FLAT_COMPILE -Ifreetype2/include ftsystem.c
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cc -c -DFT_FLAT_COMPILE -Ifreetype2/include ftinit.c
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cc -c -DFT_FLAT_COMPILE -Ifreetype2/include ftdebug.c
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cc -c -DFT_FLAT_COMPILE -Ifreetype2/include ftbase.c
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etc.
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End of file
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