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-rw-r--r--.gitignore30
-rw-r--r--AUTHORS3
-rw-r--r--COPYING674
-rw-r--r--COPYING.LESSER165
-rw-r--r--ChangeLog0
-rw-r--r--INSTALL234
-rw-r--r--Makefile.am23
-rw-r--r--NEWS0
-rw-r--r--README1
-rw-r--r--THANKS1
-rwxr-xr-xautogen.sh7
-rw-r--r--configure.ac38
-rw-r--r--libdimension-png/Makefile.am28
-rw-r--r--libdimension-png/dimension-png.h38
-rw-r--r--libdimension-png/png.c263
-rw-r--r--libdimension/Makefile.am25
-rw-r--r--libdimension/canvas.c203
-rw-r--r--libdimension/dimension.h39
-rw-r--r--libdimension/dimension/canvas.h50
-rw-r--r--libdimension/dimension/color.h46
-rw-r--r--libdimension/dimension/geometry.h92
-rw-r--r--tests/Makefile.am26
-rw-r--r--tests/png.c86
23 files changed, 2072 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..09751ab
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,30 @@
+# Files and folders created by aclocal, autoconf, automake, and libtoolize
+/aclocal.m4
+/autom4te.cache/
+/compile
+/config.*
+/configure
+/depcomp
+/install-sh
+/libtool
+/ltmain.sh
+/m4
+/missing
+Makefile
+Makefile.in
+
+# Documentation files created by make
+/doc/dimension.info
+/doc/texinfo.tex
+
+# Files created by `make check'
+/tests/png
+/tests/dimension.png
+
+# Files and folders created by libtool
+.libs/
+*.l[oa]
+
+# Files and folders created by compilation
+.deps/
+*.[oa]
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..42e25da
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,3 @@
+Authors of Dimension
+
+Tavian Barnes <tavianator@gmail.com>: Entire library and application
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
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+ The licenses for most software and other practical works are designed
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+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/COPYING.LESSER b/COPYING.LESSER
new file mode 100644
index 0000000..fc8a5de
--- /dev/null
+++ b/COPYING.LESSER
@@ -0,0 +1,165 @@
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+ This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+ 0. Additional Definitions.
+
+ As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+ "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+ An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+ A "Combined Work" is a work produced by combining or linking an
+Application with the Library. The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+ The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+ The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+ 1. Exception to Section 3 of the GNU GPL.
+
+ You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+ 2. Conveying Modified Versions.
+
+ If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+ a) under this License, provided that you make a good faith effort to
+ ensure that, in the event an Application does not supply the
+ function or data, the facility still operates, and performs
+ whatever part of its purpose remains meaningful, or
+
+ b) under the GNU GPL, with none of the additional permissions of
+ this License applicable to that copy.
+
+ 3. Object Code Incorporating Material from Library Header Files.
+
+ The object code form of an Application may incorporate material from
+a header file that is part of the Library. You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+ a) Give prominent notice with each copy of the object code that the
+ Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the object code with a copy of the GNU GPL and this license
+ document.
+
+ 4. Combined Works.
+
+ You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+ a) Give prominent notice with each copy of the Combined Work that
+ the Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the Combined Work with a copy of the GNU GPL and this license
+ document.
+
+ c) For a Combined Work that displays copyright notices during
+ execution, include the copyright notice for the Library among
+ these notices, as well as a reference directing the user to the
+ copies of the GNU GPL and this license document.
+
+ d) Do one of the following:
+
+ 0) Convey the Minimal Corresponding Source under the terms of this
+ License, and the Corresponding Application Code in a form
+ suitable for, and under terms that permit, the user to
+ recombine or relink the Application with a modified version of
+ the Linked Version to produce a modified Combined Work, in the
+ manner specified by section 6 of the GNU GPL for conveying
+ Corresponding Source.
+
+ 1) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (a) uses at run time
+ a copy of the Library already present on the user's computer
+ system, and (b) will operate properly with a modified version
+ of the Library that is interface-compatible with the Linked
+ Version.
+
+ e) Provide Installation Information, but only if you would otherwise
+ be required to provide such information under section 6 of the
+ GNU GPL, and only to the extent that such information is
+ necessary to install and execute a modified version of the
+ Combined Work produced by recombining or relinking the
+ Application with a modified version of the Linked Version. (If
+ you use option 4d0, the Installation Information must accompany
+ the Minimal Corresponding Source and Corresponding Application
+ Code. If you use option 4d1, you must provide the Installation
+ Information in the manner specified by section 6 of the GNU GPL
+ for conveying Corresponding Source.)
+
+ 5. Combined Libraries.
+
+ You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+ a) Accompany the combined library with a copy of the same work based
+ on the Library, uncombined with any other library facilities,
+ conveyed under the terms of this License.
+
+ b) Give prominent notice with the combined library that part of it
+ is a work based on the Library, and explaining where to find the
+ accompanying uncombined form of the same work.
+
+ 6. Revised Versions of the GNU Lesser General Public License.
+
+ The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+ If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/ChangeLog
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 0000000..5458714
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,234 @@
+Installation Instructions
+*************************
+
+Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
+2006 Free Software Foundation, Inc.
+
+This file is free documentation; the Free Software Foundation gives
+unlimited permission to copy, distribute and modify it.
+
+Basic Installation
+==================
+
+Briefly, the shell commands `./configure; make; make install' should
+configure, build, and install this package. The following
+more-detailed instructions are generic; see the `README' file for
+instructions specific to this package.
+
+ The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation. It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions. Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, and a
+file `config.log' containing compiler output (useful mainly for
+debugging `configure').
+
+ It can also use an optional file (typically called `config.cache'
+and enabled with `--cache-file=config.cache' or simply `-C') that saves
+the results of its tests to speed up reconfiguring. Caching is
+disabled by default to prevent problems with accidental use of stale
+cache files.
+
+ If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release. If you are using the cache, and at
+some point `config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+ The file `configure.ac' (or `configure.in') is used to create
+`configure' by a program called `autoconf'. You need `configure.ac' if
+you want to change it or regenerate `configure' using a newer version
+of `autoconf'.
+
+The simplest way to compile this package is:
+
+ 1. `cd' to the directory containing the package's source code and type
+ `./configure' to configure the package for your system.
+
+ Running `configure' might take a while. While running, it prints
+ some messages telling which features it is checking for.
+
+ 2. Type `make' to compile the package.
+
+ 3. Optionally, type `make check' to run any self-tests that come with
+ the package.
+
+ 4. Type `make install' to install the programs and any data files and
+ documentation.
+
+ 5. You can remove the program binaries and object files from the
+ source code directory by typing `make clean'. To also remove the
+ files that `configure' created (so you can compile the package for
+ a different kind of computer), type `make distclean'. There is
+ also a `make maintainer-clean' target, but that is intended mainly
+ for the package's developers. If you use it, you may have to get
+ all sorts of other programs in order to regenerate files that came
+ with the distribution.
+
+Compilers and Options
+=====================
+
+Some systems require unusual options for compilation or linking that the
+`configure' script does not know about. Run `./configure --help' for
+details on some of the pertinent environment variables.
+
+ You can give `configure' initial values for configuration parameters
+by setting variables in the command line or in the environment. Here
+is an example:
+
+ ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+ *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory. To do this, you can use GNU `make'. `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script. `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'.
+
+ With a non-GNU `make', it is safer to compile the package for one
+architecture at a time in the source code directory. After you have
+installed the package for one architecture, use `make distclean' before
+reconfiguring for another architecture.
+
+Installation Names
+==================
+
+By default, `make install' installs the package's commands under
+`/usr/local/bin', include files under `/usr/local/include', etc. You
+can specify an installation prefix other than `/usr/local' by giving
+`configure' the option `--prefix=PREFIX'.
+
+ You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files. If you
+pass the option `--exec-prefix=PREFIX' to `configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+ In addition, if you use an unusual directory layout you can give
+options like `--bindir=DIR' to specify different values for particular
+kinds of files. Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them.
+
+ If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+Optional Features
+=================
+
+Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System). The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+ For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+Specifying the System Type
+==========================
+
+There may be some features `configure' cannot figure out automatically,
+but needs to determine by the type of machine the package will run on.
+Usually, assuming the package is built to be run on the _same_
+architectures, `configure' can figure that out, but if it prints a
+message saying it cannot guess the machine type, give it the
+`--build=TYPE' option. TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name which has the form:
+
+ CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+ OS KERNEL-OS
+
+ See the file `config.sub' for the possible values of each field. If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+ If you are _building_ compiler tools for cross-compiling, you should
+use the option `--target=TYPE' to select the type of system they will
+produce code for.
+
+ If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with `--host=TYPE'.
+
+Sharing Defaults
+================
+
+If you want to set default values for `configure' scripts to share, you
+can create a site shell script called `config.site' that gives default
+values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists. Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+Variables not defined in a site shell script can be set in the
+environment passed to `configure'. However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost. In order to avoid this problem, you should set
+them in the `configure' command line, using `VAR=value'. For example:
+
+ ./configure CC=/usr/local2/bin/gcc
+
+causes the specified `gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for `CONFIG_SHELL' due to
+an Autoconf bug. Until the bug is fixed you can use this workaround:
+
+ CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+`configure' Invocation
+======================
+
+`configure' recognizes the following options to control how it operates.
+
+`--help'
+`-h'
+ Print a summary of the options to `configure', and exit.
+
+`--version'
+`-V'
+ Print the version of Autoconf used to generate the `configure'
+ script, and exit.
+
+`--cache-file=FILE'
+ Enable the cache: use and save the results of the tests in FILE,
+ traditionally `config.cache'. FILE defaults to `/dev/null' to
+ disable caching.
+
+`--config-cache'
+`-C'
+ Alias for `--cache-file=config.cache'.
+
+`--quiet'
+`--silent'
+`-q'
+ Do not print messages saying which checks are being made. To
+ suppress all normal output, redirect it to `/dev/null' (any error
+ messages will still be shown).
+
+`--srcdir=DIR'
+ Look for the package's source code in directory DIR. Usually
+ `configure' can determine that directory automatically.
+
+`configure' also accepts some other, not widely useful, options. Run
+`configure --help' for more details.
+
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..fa9b3b2
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,23 @@
+###########################################################################
+## Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> ##
+## ##
+## This file is part of the Dimension Build Suite. ##
+## ##
+## The Dimension Build Suite is free software; you can redistribute it ##
+## and/or modify it under the terms of the GNU General Public License as ##
+## published by the Free Software Foundation; either version 3 of the ##
+## License, or (at your option) any later version. ##
+## ##
+## The Dimension Build Suite is distributed in the hope that it will be ##
+## useful, but WITHOUT ANY WARRANTY; without even the implied warranty ##
+## of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ##
+## General Public License for more details. ##
+## ##
+## You should have received a copy of the GNU General Public License ##
+## along with this program. If not, see <http://www.gnu.org/licenses/>. ##
+###########################################################################
+
+ACLOCAL_AMFLAGS = -I m4
+SUBDIRS = libdimension libdimension-png tests
+
+EXTRA_DIST = autogen.sh
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/NEWS
diff --git a/README b/README
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/README
@@ -0,0 +1 @@
+
diff --git a/THANKS b/THANKS
new file mode 100644
index 0000000..9cbf5b9
--- /dev/null
+++ b/THANKS
@@ -0,0 +1 @@
+Dimension THANKS file
diff --git a/autogen.sh b/autogen.sh
new file mode 100755
index 0000000..b16d700
--- /dev/null
+++ b/autogen.sh
@@ -0,0 +1,7 @@
+#! /bin/sh
+
+aclocal
+autoconf
+libtoolize --force --copy
+automake --add-missing --copy
+echo You may now run ./configure
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..b952b41
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,38 @@
+dnl Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com>
+dnl
+dnl This file is part of the Dimension Build Suite.
+dnl
+dnl The Dimension Build Suite is free software; you can redistribute it
+dnl and/or modify it under the terms of the GNU General Public License as
+dnl published by the Free Software Foundation; either version 3 of the
+dnl License, or (at your option) any later version.
+dnl
+dnl The Dimension Build Suite is distributed in the hope that it will be
+dnl useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+dnl of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+dnl General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+AC_PREREQ(2.63)
+AC_INIT(Dimension, 0.0.0, tavianator@gmail.com, dimension)
+AM_INIT_AUTOMAKE(dimension, 0.0.0)
+
+dnl Programs
+AC_PROG_CC
+AC_PROG_CXX
+AM_PROG_CC_C_O
+AM_PROG_AS
+AC_PROG_INSTALL
+AC_PROG_LN_S
+AC_PROG_MAKE_SET
+AC_PROG_LIBTOOL
+
+dnl Generate Makefiles
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_FILES([Makefile
+ libdimension/Makefile
+ libdimension-png/Makefile
+ tests/Makefile])
+AC_OUTPUT
diff --git a/libdimension-png/Makefile.am b/libdimension-png/Makefile.am
new file mode 100644
index 0000000..f611ff9
--- /dev/null
+++ b/libdimension-png/Makefile.am
@@ -0,0 +1,28 @@
+###########################################################################
+## Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> ##
+## ##
+## This file is part of the Dimension Build Suite. ##
+## ##
+## The Dimension Build Suite is free software; you can redistribute it ##
+## and/or modify it under the terms of the GNU General Public License as ##
+## published by the Free Software Foundation; either version 3 of the ##
+## License, or (at your option) any later version. ##
+## ##
+## The Dimension Build Suite is distributed in the hope that it will be ##
+## useful, but WITHOUT ANY WARRANTY; without even the implied warranty ##
+## of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ##
+## General Public License for more details. ##
+## ##
+## You should have received a copy of the GNU General Public License ##
+## along with this program. If not, see <http://www.gnu.org/licenses/>. ##
+###########################################################################
+
+nobase_include_HEADERS = dimension-png.h
+
+lib_LTLIBRARIES = libdimension-png.la
+
+INCLUDES = -I../libdimension
+
+libdimension_png_la_SOURCES = dimension-png.h png.c
+libdimension_png_la_LDFLAGS = -version-info 0:0:0
+libdimension_png_la_LIBADD = -lpng
diff --git a/libdimension-png/dimension-png.h b/libdimension-png/dimension-png.h
new file mode 100644
index 0000000..3c88c44
--- /dev/null
+++ b/libdimension-png/dimension-png.h
@@ -0,0 +1,38 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of Dimension. *
+ * *
+ * Dimension is free software; you can redistribute it and/or modify it *
+ * under the terms of the GNU Lesser General Public License as published *
+ * by the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * Dimension is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#ifndef DIMENSION_PNG_H
+#define DIMENSION_PNG_H
+
+#include <dimension.h>
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int dmnsn_png_write_canvas(const dmnsn_canvas *canvas, FILE *file);
+int dmnsn_png_read_canvas(dmnsn_canvas **canvas, FILE *file);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* DIMENSION_PNG_H */
diff --git a/libdimension-png/png.c b/libdimension-png/png.c
new file mode 100644
index 0000000..750b5af
--- /dev/null
+++ b/libdimension-png/png.c
@@ -0,0 +1,263 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of Dimension. *
+ * *
+ * Dimension is free software; you can redistribute it and/or modify it *
+ * under the terms of the GNU Lesser General Public License as published *
+ * by the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * Dimension is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#include "dimension-png.h"
+#include <png.h>
+#include <setjmp.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+
+int
+dmnsn_png_write_canvas(const dmnsn_canvas *canvas, FILE *file)
+{
+ png_structp png_ptr;
+ png_infop info_ptr;
+ png_uint_32 width, height;
+ unsigned int x, y;
+ uint16_t *row = NULL;
+ dmnsn_pixel *pixel;
+
+ width = canvas->x;
+ height = canvas->y;
+
+ if (!file) return 1;
+
+ png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ if (!png_ptr) return 1;
+
+ info_ptr = png_create_info_struct(png_ptr);
+ if (!info_ptr) {
+ png_destroy_write_struct(&png_ptr, NULL);
+ return 1;
+ }
+
+ if (setjmp(png_jmpbuf(png_ptr))) {
+ if (row) free(row);
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ return 1;
+ }
+
+ png_init_io(png_ptr, file);
+
+ png_set_IHDR(png_ptr, info_ptr, width, height, 16,
+ PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
+ PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+
+ png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, PNG_sRGB_INTENT_ABSOLUTE);
+
+ png_set_invert_alpha(png_ptr);
+ png_write_info(png_ptr, info_ptr);
+
+ if (htonl(1) != 1) {
+ /* We are little-endian */
+ png_set_swap(png_ptr);
+ }
+
+ row = malloc(4*sizeof(uint16_t)*width);
+ if (!row) {
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ return 1;
+ }
+
+ for (y = 0; y < height; ++y) {
+ for (x = 0; x < width; ++x) {
+ /* Invert the rows. PNG coordinates are fourth quadrant. */
+ pixel = canvas->pixels + (height - y - 1)*width + x;
+
+ row[4*x] = pixel->r;
+ row[4*x + 1] = pixel->g;
+ row[4*x + 2] = pixel->b;
+
+ if (pixel->a > pixel->t) {
+ row[4*x + 3] = pixel->a;
+ } else {
+ row[4*x + 3] = pixel->t;
+ }
+ }
+ png_write_row(png_ptr, (png_bytep)row);
+ }
+
+ png_write_end(png_ptr, info_ptr);
+
+ free(row);
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ return 0;
+}
+
+int
+dmnsn_png_read_canvas(dmnsn_canvas **canvas, FILE *file)
+{
+ png_byte header[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+ png_structp png_ptr;
+ png_infop info_ptr;
+ png_uint_32 width, height, rowbytes;
+ int bit_depth, color_type, interlace_type, compression_type, filter_method;
+ png_bytep image = NULL;
+ png_bytep *row_pointers = NULL;
+ unsigned int x, y;
+ dmnsn_pixel *pixel;
+ png_bytep png_pixel;
+
+ /* Ensure that *canvas can always be deleted. */
+ *canvas = NULL;
+
+ if (!file) return 1;
+
+ fread(header, 1, 8, file);
+ if (png_sig_cmp(header, 0, 8)) return 1;
+
+ png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ if (!png_ptr) return 1;
+
+ info_ptr = png_create_info_struct(png_ptr);
+ if (!info_ptr) {
+ png_destroy_read_struct(&png_ptr, NULL, NULL);
+ return 1;
+ }
+
+ if (setjmp(png_jmpbuf(png_ptr))) {
+ if (row_pointers) free(row_pointers);
+ if (image) free(image);
+ png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+ return 1;
+ }
+
+ png_init_io(png_ptr, file);
+ png_set_sig_bytes(png_ptr, 8);
+
+ png_read_info(png_ptr, info_ptr);
+
+ png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
+ &interlace_type, &compression_type, &filter_method);
+
+ /*
+ * - Convert paletted images to RGB.
+ * - Convert a tRNS chunk to an alpha channel
+ * - Convert grayscale to RGB
+ * - Invert the alpha channel
+ */
+ if (color_type == PNG_COLOR_TYPE_PALETTE) {
+ png_set_palette_to_rgb(png_ptr);
+ }
+ if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
+ png_set_tRNS_to_alpha(png_ptr);
+ }
+ if (color_type == PNG_COLOR_TYPE_GRAY
+ || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
+ png_set_gray_to_rgb(png_ptr);
+ }
+ png_set_invert_alpha(png_ptr);
+
+ png_read_update_info(png_ptr, info_ptr);
+ rowbytes = png_get_rowbytes(png_ptr, info_ptr);
+
+ image = malloc(rowbytes*height);
+ if (!image) {
+ png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+ return 1;
+ }
+
+ row_pointers = malloc(sizeof(png_bytep)*height);
+ if (!row_pointers) {
+ free(image);
+ png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+ return 1;
+ }
+
+ for (y = 0; y < height; ++y) {
+ row_pointers[y] = image + y*rowbytes;
+ }
+
+ png_read_image(png_ptr, row_pointers);
+
+ *canvas = dmnsn_new_canvas(width, height);
+ if (!*canvas) {
+ free(row_pointers);
+ free(image);
+ png_read_end(png_ptr, NULL);
+ png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+ return 1;
+ }
+
+ if (bit_depth == 16) {
+ if (color_type & PNG_COLOR_MASK_ALPHA) {
+ for (x = 0; x < width; ++x) {
+ for (y = 0; y < height; ++y) {
+ pixel = (*canvas)->pixels + (height - y - 1)*width + x;
+ png_pixel = image + 8*(y*width + x);
+
+ pixel->r = (png_pixel[0] << UINT16_C(8)) + png_pixel[1];
+ pixel->g = (png_pixel[2] << UINT16_C(8)) + png_pixel[3];
+ pixel->b = (png_pixel[4] << UINT16_C(8)) + png_pixel[5];
+ pixel->a = (png_pixel[6] << UINT16_C(8)) + png_pixel[7];
+ pixel->t = 0;
+ }
+ }
+ } else {
+ for (x = 0; x < width; ++x) {
+ for (y = 0; y < height; ++y) {
+ pixel = (*canvas)->pixels + (height - y - 1)*width + x;
+ png_pixel = image + 6*(y*width + x);
+
+ pixel->r = (png_pixel[0] << UINT16_C(8)) + png_pixel[1];
+ pixel->g = (png_pixel[2] << UINT16_C(8)) + png_pixel[3];
+ pixel->b = (png_pixel[4] << UINT16_C(8)) + png_pixel[5];
+ pixel->a = 0;
+ pixel->t = 0;
+ }
+ }
+ }
+ } else {
+ /* Bit depth is 8 */
+ if (color_type & PNG_COLOR_MASK_ALPHA) {
+ for (x = 0; x < width; ++x) {
+ for (y = 0; y < height; ++y) {
+ pixel = (*canvas)->pixels + (height - y - 1)*width + x;
+ png_pixel = image + 4*(y*width + x);
+
+ pixel->r = png_pixel[0] << UINT16_C(8);
+ pixel->g = png_pixel[1] << UINT16_C(8);
+ pixel->b = png_pixel[2] << UINT16_C(8);
+ pixel->a = png_pixel[3] << UINT16_C(8);
+ pixel->t = 0;
+ }
+ }
+ } else {
+ for (x = 0; x < width; ++x) {
+ for (y = 0; y < height; ++y) {
+ pixel = (*canvas)->pixels + (height - y - 1)*width + x;
+ png_pixel = image + 3*(y*width + x);
+
+ pixel->r = png_pixel[0] << UINT16_C(8);
+ pixel->g = png_pixel[1] << UINT16_C(8);
+ pixel->b = png_pixel[2] << UINT16_C(8);
+ pixel->a = 0;
+ pixel->t = 0;
+ }
+ }
+ }
+ }
+
+ free(row_pointers);
+ free(image);
+ png_read_end(png_ptr, NULL);
+ png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+ return 0;
+}
diff --git a/libdimension/Makefile.am b/libdimension/Makefile.am
new file mode 100644
index 0000000..293093c
--- /dev/null
+++ b/libdimension/Makefile.am
@@ -0,0 +1,25 @@
+###########################################################################
+## Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> ##
+## ##
+## This file is part of the Dimension Build Suite. ##
+## ##
+## The Dimension Build Suite is free software; you can redistribute it ##
+## and/or modify it under the terms of the GNU General Public License as ##
+## published by the Free Software Foundation; either version 3 of the ##
+## License, or (at your option) any later version. ##
+## ##
+## The Dimension Build Suite is distributed in the hope that it will be ##
+## useful, but WITHOUT ANY WARRANTY; without even the implied warranty ##
+## of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ##
+## General Public License for more details. ##
+## ##
+## You should have received a copy of the GNU General Public License ##
+## along with this program. If not, see <http://www.gnu.org/licenses/>. ##
+###########################################################################
+
+nobase_include_HEADERS = dimension.h dimension/geometry.h dimension/color.h dimension/canvas.h
+
+lib_LTLIBRARIES = libdimension.la
+
+libdimension_la_SOURCES = dimension.h dimension/geometry.h dimension/color.h dimension/canvas.h canvas.c
+libdimension_la_LDFLAGS = -version-info 0:0:0
diff --git a/libdimension/canvas.c b/libdimension/canvas.c
new file mode 100644
index 0000000..c730b53
--- /dev/null
+++ b/libdimension/canvas.c
@@ -0,0 +1,203 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of Dimension. *
+ * *
+ * Dimension is free software; you can redistribute it and/or modify it *
+ * under the terms of the GNU Lesser General Public License as published *
+ * by the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * Dimension is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#include "dimension.h"
+#include <math.h>
+#include <stdlib.h>
+
+/* Conversions between CIE 1931 XYZ and sRGB color. */
+
+dmnsn_pixel
+dmnsn_pixel_from_color(dmnsn_color color)
+{
+ double Rlinear, Glinear, Blinear; /* Linear RGB values - no gamma */
+ double R, G, B; /* sRGB values */
+ dmnsn_pixel pixel;
+
+ /*
+ * First, the linear conversion. Expressed as matrix multiplication, it looks
+ * like this:
+ *
+ * [Rlinear] [ 3.2410 -1.5374 -0.4986] [X]
+ * [Glinear] = [-0.9692 1.8760 0.0416]*[Y]
+ * [Blinear] [ 0.0556 -0.2040 1.0570] [Z]
+ */
+ Rlinear = 3.2410*color.X - 1.5374*color.Y - 0.4986*color.Z;
+ Glinear = -0.9692*color.X + 1.8760*color.Y + 0.0416*color.Z;
+ Blinear = 0.0556*color.X - 0.2040*color.Y + 1.0570*color.Z;
+
+ /*
+ * If C represents R, G, and B, then the sRGB values are now found as follows:
+ *
+ * { 12.92*Clinear, Clinear <= 0.0031308
+ * Csrgb = { 1/2.4
+ * { (1.055)*Clinear - 0.055, Clinear > 0.0031308
+ */
+
+ if (Rlinear <= 0.0031308) {
+ R = 12.92*Rlinear;
+ } else {
+ R = 1.055*pow(Rlinear, 1.0/2.4) - 0.055;
+ }
+
+ if (Glinear <= 0.0031308) {
+ G = 12.92*Glinear;
+ } else {
+ G = 1.055*pow(Glinear, 1.0/2.4) - 0.055;
+ }
+
+ if (Blinear <= 0.0031308) {
+ B = 12.92*Blinear;
+ } else {
+ B = 1.055*pow(Blinear, 1.0/2.4) - 0.055;
+ }
+
+ /* Now we go from unlimited to limited light, saturating at UINT16_MAX */
+
+ if (R < 0) {
+ pixel.r = 0;
+ } else if (R > 1) {
+ pixel.r = UINT16_MAX;
+ } else {
+ pixel.r = UINT16_MAX*R;
+ }
+
+ if (G < 0) {
+ pixel.g = 0;
+ } else if (G > 1) {
+ pixel.g = UINT16_MAX;
+ } else {
+ pixel.g = UINT16_MAX*G;
+ }
+
+ if (B < 0) {
+ pixel.b = 0;
+ } else if (B > 1) {
+ pixel.b = UINT16_MAX;
+ } else {
+ pixel.b = UINT16_MAX*B;
+ }
+
+ if (color.alpha < 0) {
+ pixel.a = 0;
+ } else if (color.alpha > 1) {
+ pixel.a = UINT16_MAX;
+ } else {
+ pixel.a = UINT16_MAX*color.alpha;
+ }
+
+ if (color.trans < 0) {
+ pixel.t = 0;
+ } else if (color.trans > 1) {
+ pixel.t = UINT16_MAX;
+ } else {
+ pixel.t = UINT16_MAX*color.trans;
+ }
+
+ return pixel;
+}
+
+dmnsn_color
+dmnsn_color_from_pixel(dmnsn_pixel pixel)
+{
+ double R, G, B; /* sRGB values */
+ double Rlinear, Glinear, Blinear; /* Linear RGB values - no gamma */
+ dmnsn_color color;
+
+ /* Conversion back to unlimited light */
+ R = ((double)pixel.r)/UINT16_MAX;
+ G = ((double)pixel.g)/UINT16_MAX;
+ B = ((double)pixel.b)/UINT16_MAX;
+
+ /*
+ * If C represents R, G, and B, then the Clinear values are now found as
+ * follows:
+ *
+ * { Csrgb/12.92, Csrgb <= 0.04045
+ * Clinear = { 1/2.4
+ * { ((Csrgb + 0.055)/1.055) , Csrgb > 0.04045
+ */
+
+ if (R <= 0.04045) {
+ Rlinear = R/19.92;
+ } else {
+ Rlinear = pow((R + 0.055)/1.055, 2.4);
+ }
+
+ if (G <= 0.04045) {
+ Glinear = G/19.92;
+ } else {
+ Glinear = pow((G + 0.055)/1.055, 2.4);
+ }
+
+ if (B <= 0.04045) {
+ Blinear = B/19.92;
+ } else {
+ Blinear = pow((B + 0.055)/1.055, 2.4);
+ }
+
+ /*
+ * Now, the linear conversion. Expressed as matrix multiplication, it looks
+ * like this:
+ *
+ * [X] [0.4124 0.3576 0.1805] [Rlinear]
+ * [Y] = [0.2126 0.7152 0.0722]*[Glinear]
+ * [X] [0.0193 0.1192 0.9505] [Blinear]
+ */
+
+ color.X = 0.4124*Rlinear + 0.3576*Glinear + 0.1805*Blinear;
+ color.Y = 0.2126*Rlinear + 0.7152*Glinear + 0.0722*Blinear;
+ color.Z = 0.0193*Rlinear + 0.1192*Glinear + 0.9505*Blinear;
+
+ color.alpha = ((double)pixel.a)/UINT16_MAX;
+ color.trans = ((double)pixel.t)/UINT16_MAX;
+
+ return color;
+}
+
+dmnsn_canvas *
+dmnsn_new_canvas(unsigned int x, unsigned int y)
+{
+ dmnsn_canvas *canvas = malloc(sizeof(dmnsn_canvas));
+
+ if (canvas) {
+ canvas->x = x;
+ canvas->y = y;
+ canvas->pixels = malloc(sizeof(dmnsn_pixel)*x*y);
+
+ if (canvas->pixels) {
+ return canvas;
+ } else {
+ free(canvas);
+ return NULL;
+ }
+ } else {
+ return NULL;
+ }
+}
+
+void
+dmnsn_delete_canvas(dmnsn_canvas *canvas)
+{
+ if (canvas) {
+ free(canvas->pixels);
+ free(canvas);
+ }
+}
diff --git a/libdimension/dimension.h b/libdimension/dimension.h
new file mode 100644
index 0000000..558c9ed
--- /dev/null
+++ b/libdimension/dimension.h
@@ -0,0 +1,39 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of Dimension. *
+ * *
+ * Dimension is free software; you can redistribute it and/or modify it *
+ * under the terms of the GNU Lesser General Public License as published *
+ * by the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * Dimension is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#ifndef DIMENSION_H
+#define DIMENSION_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <dimension/geometry.h>
+#include <dimension/color.h>
+#include <dimension/canvas.h>
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* DIMENSION_H */
diff --git a/libdimension/dimension/canvas.h b/libdimension/dimension/canvas.h
new file mode 100644
index 0000000..251c64a
--- /dev/null
+++ b/libdimension/dimension/canvas.h
@@ -0,0 +1,50 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of Dimension. *
+ * *
+ * Dimension is free software; you can redistribute it and/or modify it *
+ * under the terms of the GNU Lesser General Public License as published *
+ * by the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * Dimension is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+/*
+ * A canvas which is rendered to.
+ */
+
+#ifndef DIMENSION_CANVAS_H
+#define DIMENSION_CANVAS_H
+
+/* 48-bit sRGB color for pixels. */
+typedef struct {
+ uint16_t r, g, b;
+ uint16_t a, t;
+} dmnsn_pixel;
+
+dmnsn_pixel dmnsn_pixel_from_color(dmnsn_color color);
+dmnsn_color dmnsn_color_from_pixel(dmnsn_pixel pixel);
+
+typedef struct {
+ unsigned int x, y;
+
+ /*
+ * Stored in first-quadrant representation (origin is bottom-left). The pixel
+ * at (a,b) is accessible as pixels[b*x + a].
+ */
+ dmnsn_pixel *pixels;
+} dmnsn_canvas;
+
+dmnsn_canvas *dmnsn_new_canvas(unsigned int x, unsigned int y);
+void dmnsn_delete_canvas(dmnsn_canvas *canvas);
+
+#endif /* DIMENSION_CANVAS_H */
diff --git a/libdimension/dimension/color.h b/libdimension/dimension/color.h
new file mode 100644
index 0000000..1f4a42e
--- /dev/null
+++ b/libdimension/dimension/color.h
@@ -0,0 +1,46 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of Dimension. *
+ * *
+ * Dimension is free software; you can redistribute it and/or modify it *
+ * under the terms of the GNU Lesser General Public License as published *
+ * by the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * Dimension is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+/*
+ * Types to represent color.
+ */
+
+#ifndef DIMENSION_COLOR_H
+#define DIMENSION_COLOR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* CIE 1931 XYZ color. */
+typedef struct {
+ double X, Y, Z; /* X, Y, and Z are the tristimulus values of a color in CIE
+ 1931 XYZ color space. We use an unlimited light model
+ here, where the range of X, Y, and Z are unbounded >= 0. */
+ double alpha, trans; /* Alpha transparancy only lets light of this color
+ through; regular transparancy lets all colors
+ through */
+} dmnsn_color;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* DIMENSION_COLOR_H */
diff --git a/libdimension/dimension/geometry.h b/libdimension/dimension/geometry.h
new file mode 100644
index 0000000..2c0c204
--- /dev/null
+++ b/libdimension/dimension/geometry.h
@@ -0,0 +1,92 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of Dimension. *
+ * *
+ * Dimension is free software; you can redistribute it and/or modify it *
+ * under the terms of the GNU Lesser General Public License as published *
+ * by the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * Dimension is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+/*
+ * Core geometric types like scalars, vectors, and rays.
+ */
+
+#ifndef DIMENSION_GEOMETRY_H
+#define DIMENSION_GEOMETRY_H
+
+/* Scalar and vector types. */
+typedef double dmnsn_scalar;
+typedef struct { dmnsn_scalar x, y, z; } dmnsn_vector;
+
+/* Vector arithmetic */
+
+inline dmnsn_vector
+dmnsn_vector_construct(dmnsn_scalar x, dmnsn_scalar y, dmnsn_scalar z)
+{
+ dmnsn_vector v = { .x = x, .y = y, .z = z };
+ return v;
+}
+
+inline dmnsn_vector
+dmnsn_vector_add(dmnsn_vector lhs, dmnsn_vector rhs)
+{
+ return dmnsn_vector_construct(lhs.x + rhs.x, lhs.y + rhs.y, lhs.z + rhs.z);
+}
+
+inline dmnsn_vector
+dmnsn_vector_sub(dmnsn_vector lhs, dmnsn_vector rhs)
+{
+ return dmnsn_vector_construct(lhs.x - rhs.x, lhs.y - rhs.y, lhs.z - rhs.z);
+}
+
+inline dmnsn_vector
+dmnsn_vector_mul(dmnsn_scalar lhs, dmnsn_vector rhs)
+{
+ return dmnsn_vector_construct(lhs*rhs.x, lhs*rhs.y, lhs*rhs.z);
+}
+
+inline dmnsn_vector
+dmnsn_vector_div(dmnsn_vector lhs, dmnsn_scalar rhs)
+{
+ return dmnsn_vector_construct(lhs.x/rhs, lhs.y/rhs, lhs.z/rhs);
+}
+
+inline dmnsn_scalar
+dmnsn_vector_dot(dmnsn_vector lhs, dmnsn_vector rhs)
+{
+ return lhs.x*rhs.x + lhs.y*rhs.y + lhs.z*rhs.z;
+}
+
+inline dmnsn_vector
+dmnsn_vector_cross(dmnsn_vector lhs, dmnsn_vector rhs)
+{
+ return dmnsn_vector_construct(lhs.y*rhs.z - lhs.z*rhs.y,
+ lhs.z*rhs.x - lhs.x*rhs.z,
+ lhs.x*rhs.y - lhs.y*rhs.x);
+}
+
+/* A line, or ray. */
+typedef struct {
+ dmnsn_vector x0; /* A point on the line */
+ dmnsn_vector n; /* A normal vector; the direction of the line */
+} dmnsn_line;
+
+/* A point on a line, defined by x0 + t*n */
+inline dmnsn_vector
+dmnsn_line_point(dmnsn_line l, dmnsn_scalar t)
+{
+ return dmnsn_vector_add(l.x0, dmnsn_vector_mul(t, l.n));
+}
+
+#endif /* DIMENSION_GEOMETRY_H */
diff --git a/tests/Makefile.am b/tests/Makefile.am
new file mode 100644
index 0000000..d596017
--- /dev/null
+++ b/tests/Makefile.am
@@ -0,0 +1,26 @@
+###########################################################################
+## Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> ##
+## ##
+## This file is part of The FPFD Library Build Suite. ##
+## ##
+## The FPFD Library Build Suite is free software; you can redistribute ##
+## it and/or modify it under the terms of the GNU General Public License ##
+## as published by the Free Software Foundation; either version 3 of the ##
+## License, or (at your option) any later version. ##
+## ##
+## The FPFD Library Build Suite is distributed in the hope that it will ##
+## be useful, but WITHOUT ANY WARRANTY; without even the implied ##
+## warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See ##
+## the GNU General Public License for more details. ##
+## ##
+## You should have received a copy of the GNU General Public License ##
+## along with this program. If not, see <http://www.gnu.org/licenses/>. ##
+###########################################################################
+
+check_PROGRAMS = png
+TESTS = $(check_PROGRAMS)
+
+INCLUDES = -I../libdimension -I../libdimension-png
+
+png_SOURCES = png.c
+png_LDADD = ../libdimension/libdimension.la ../libdimension-png/libdimension-png.la
diff --git a/tests/png.c b/tests/png.c
new file mode 100644
index 0000000..e16ee8e
--- /dev/null
+++ b/tests/png.c
@@ -0,0 +1,86 @@
+#include "../libdimension/dimension.h"
+#include "../libdimension-png/dimension-png.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+
+int main() {
+ dmnsn_canvas *canvas;
+ FILE *ofile, *ifile;
+ unsigned int x, y;
+
+ canvas = dmnsn_new_canvas(333, 300);
+ if (!canvas) {
+ fprintf(stderr, "--- Allocation of canvas failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ ofile = fopen("dimension.png", "wb");
+ if (!ofile) {
+ fprintf(stderr, "--- Opening 'dimension.png' for writing failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ for (x = 0; x < canvas->x; ++x) {
+ for (y = 0; y < canvas->y; ++y) {
+ if (x < canvas->x/3) {
+ canvas->pixels[y*canvas->x + x].r = UINT16_MAX;
+ canvas->pixels[y*canvas->x + x].g = 0;
+ canvas->pixels[y*canvas->x + x].b = 0;
+ } else if (x < 2*canvas->x/3) {
+ canvas->pixels[y*canvas->x + x].r = 0;
+ canvas->pixels[y*canvas->x + x].g = UINT16_MAX;
+ canvas->pixels[y*canvas->x + x].b = 0;
+ } else {
+ canvas->pixels[y*canvas->x + x].r = 0;
+ canvas->pixels[y*canvas->x + x].g = 0;
+ canvas->pixels[y*canvas->x + x].b = UINT16_MAX;
+ }
+
+ if (y < canvas->y/3) {
+ canvas->pixels[y*canvas->x + x].a = 0;
+ canvas->pixels[y*canvas->x + x].t = 0;
+ } else if (y < 2*canvas->y/3) {
+ canvas->pixels[y*canvas->x + x].a = UINT16_MAX/4;
+ canvas->pixels[y*canvas->x + x].t = 0;
+ } else {
+ canvas->pixels[y*canvas->x + x].a = UINT16_MAX/4;
+ canvas->pixels[y*canvas->x + x].t = UINT16_MAX/2;
+ }
+ }
+ }
+
+ if (dmnsn_png_write_canvas(canvas, ofile)) {
+ fprintf(stderr, "--- Writing canvas failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ dmnsn_delete_canvas(canvas);
+
+ fclose(ofile);
+ ifile = fopen("dimension.png", "rb");
+ if (!ifile) {
+ fprintf(stderr, "--- Opening 'dimension.png' for reading failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ if (dmnsn_png_read_canvas(&canvas, ifile)) {
+ fprintf(stderr, "--- Reading canvas failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ fclose(ifile);
+ ofile = fopen("dimension.png", "wb");
+ if (!ofile) {
+ fprintf(stderr, "--- Opening 'dimension.png' for writing failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ if (dmnsn_png_write_canvas(canvas, ofile)) {
+ fprintf(stderr, "--- Writing canvas failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ dmnsn_delete_canvas(canvas);
+ return EXIT_SUCCESS;
+}
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