commit 4209589fbd04ec9c6a5505c2cf0752129cc4d9ab
Author: Luke Willis <lukejw@monastech.xyz>
Date: Mon, 9 Mar 2026 16:27:36 -0400
Initial commit (move to gitolite)
Diffstat:
| A | .gitignore | | | 2 | ++ |
| A | LICENSE.md | | | 675 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | README.md | | | 29 | +++++++++++++++++++++++++++++ |
| A | guix.scm | | | 24 | ++++++++++++++++++++++++ |
| A | manifest.scm | | | 7 | +++++++ |
| A | meson.build | | | 36 | ++++++++++++++++++++++++++++++++++++ |
| A | shaders/frag.glsl | | | 11 | +++++++++++ |
| A | shaders/vert.glsl | | | 20 | ++++++++++++++++++++ |
| A | src/config.c | | | 156 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/config.h | | | 60 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/main.c | | | 473 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/util.c | | | 83 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/util.h | | | 36 | ++++++++++++++++++++++++++++++++++++ |
13 files changed, 1612 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,2 @@
+*~
+build
diff --git a/LICENSE.md b/LICENSE.md
@@ -0,0 +1,675 @@
+# GNU GENERAL PUBLIC LICENSE
+
+Version 3, 29 June 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc.
+<https://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+## Preamble
+
+The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+the GNU General Public License is intended to guarantee your freedom
+to share and change all versions of a program--to make sure it remains
+free software for all its users. We, the Free Software Foundation, use
+the GNU General Public License for most of our software; it applies
+also to any other work released this way by its authors. You can apply
+it to your programs, too.
+
+When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights. Therefore, you
+have certain responsibilities if you distribute copies of the
+software, or if you modify it: responsibilities to respect the freedom
+of others.
+
+For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received. You must make sure that they, too, receive
+or can get the source code. And you must show them these terms so they
+know their rights.
+
+Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software. For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the
+manufacturer can do so. This is fundamentally incompatible with the
+aim of protecting users' freedom to change the software. The
+systematic pattern of such abuse occurs in the area of products for
+individuals to use, which is precisely where it is most unacceptable.
+Therefore, we have designed this version of the GPL to prohibit the
+practice for those products. If such problems arise substantially in
+other domains, we stand ready to extend this provision to those
+domains in future versions of the GPL, as needed to protect the
+freedom of users.
+
+Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish
+to avoid the special danger that patents applied to a free program
+could make it effectively proprietary. To prevent this, the GPL
+assures that patents cannot be used to render the program non-free.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+## TERMS AND CONDITIONS
+
+### 0. Definitions.
+
+"This License" refers to version 3 of the GNU General Public License.
+
+"Copyright" also means copyright-like laws that apply to other kinds
+of works, such as semiconductor masks.
+
+"The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
+"recipients" may be individuals or organizations.
+
+To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of
+an exact copy. The resulting work is called a "modified version" of
+the earlier work or a work "based on" the earlier work.
+
+A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user
+through a computer network, with no transfer of a copy, is not
+conveying.
+
+An interactive user interface displays "Appropriate Legal Notices" to
+the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License. If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+### 1. Source Code.
+
+The "source code" for a work means the preferred form of the work for
+making modifications to it. "Object code" means any non-source form of
+a work.
+
+A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form. A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities. However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work. For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+The Corresponding Source need not include anything that users can
+regenerate automatically from other parts of the Corresponding Source.
+
+The Corresponding Source for a work in source code form is that same
+work.
+
+### 2. Basic Permissions.
+
+All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met. This License explicitly affirms your unlimited
+permission to run the unmodified Program. The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work. This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+You may make, run and propagate covered works that you do not convey,
+without conditions so long as your license otherwise remains in force.
+You may convey covered works to others for the sole purpose of having
+them make modifications exclusively for you, or provide you with
+facilities for running those works, provided that you comply with the
+terms of this License in conveying all material for which you do not
+control copyright. Those thus making or running the covered works for
+you must do so exclusively on your behalf, under your direction and
+control, on terms that prohibit them from making any copies of your
+copyrighted material outside their relationship with you.
+
+Conveying under any other circumstances is permitted solely under the
+conditions stated below. Sublicensing is not allowed; section 10 makes
+it unnecessary.
+
+### 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such
+circumvention is effected by exercising rights under this License with
+respect to the covered work, and you disclaim any intention to limit
+operation or modification of the work as a means of enforcing, against
+the work's users, your or third parties' legal rights to forbid
+circumvention of technological measures.
+
+### 4. Conveying Verbatim Copies.
+
+You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+### 5. Conveying Modified Source Versions.
+
+You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these
+conditions:
+
+- a) The work must carry prominent notices stating that you modified
+ it, and giving a relevant date.
+- b) The work must carry prominent notices stating that it is
+ released under this License and any conditions added under
+ section 7. This requirement modifies the requirement in section 4
+ to "keep intact all notices".
+- c) You must license the entire work, as a whole, under this
+ License to anyone who comes into possession of a copy. This
+ License will therefore apply, along with any applicable section 7
+ additional terms, to the whole of the work, and all its parts,
+ regardless of how they are packaged. This License gives no
+ permission to license the work in any other way, but it does not
+ invalidate such permission if you have separately received it.
+- d) If the work has interactive user interfaces, each must display
+ Appropriate Legal Notices; however, if the Program has interactive
+ interfaces that do not display Appropriate Legal Notices, your
+ work need not make them do so.
+
+A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit. Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+### 6. Conveying Non-Source Forms.
+
+You may convey a covered work in object code form under the terms of
+sections 4 and 5, provided that you also convey the machine-readable
+Corresponding Source under the terms of this License, in one of these
+ways:
+
+- a) Convey the object code in, or embodied in, a physical product
+ (including a physical distribution medium), accompanied by the
+ Corresponding Source fixed on a durable physical medium
+ customarily used for software interchange.
+- b) Convey the object code in, or embodied in, a physical product
+ (including a physical distribution medium), accompanied by a
+ written offer, valid for at least three years and valid for as
+ long as you offer spare parts or customer support for that product
+ model, to give anyone who possesses the object code either (1) a
+ copy of the Corresponding Source for all the software in the
+ product that is covered by this License, on a durable physical
+ medium customarily used for software interchange, for a price no
+ more than your reasonable cost of physically performing this
+ conveying of source, or (2) access to copy the Corresponding
+ Source from a network server at no charge.
+- c) Convey individual copies of the object code with a copy of the
+ written offer to provide the Corresponding Source. This
+ alternative is allowed only occasionally and noncommercially, and
+ only if you received the object code with such an offer, in accord
+ with subsection 6b.
+- d) Convey the object code by offering access from a designated
+ place (gratis or for a charge), and offer equivalent access to the
+ Corresponding Source in the same way through the same place at no
+ further charge. You need not require recipients to copy the
+ Corresponding Source along with the object code. If the place to
+ copy the object code is a network server, the Corresponding Source
+ may be on a different server (operated by you or a third party)
+ that supports equivalent copying facilities, provided you maintain
+ clear directions next to the object code saying where to find the
+ Corresponding Source. Regardless of what server hosts the
+ Corresponding Source, you remain obligated to ensure that it is
+ available for as long as needed to satisfy these requirements.
+- e) Convey the object code using peer-to-peer transmission,
+ provided you inform other peers where the object code and
+ Corresponding Source of the work are being offered to the general
+ public at no charge under subsection 6d.
+
+A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal,
+family, or household purposes, or (2) anything designed or sold for
+incorporation into a dwelling. In determining whether a product is a
+consumer product, doubtful cases shall be resolved in favor of
+coverage. For a particular product received by a particular user,
+"normally used" refers to a typical or common use of that class of
+product, regardless of the status of the particular user or of the way
+in which the particular user actually uses, or expects or is expected
+to use, the product. A product is a consumer product regardless of
+whether the product has substantial commercial, industrial or
+non-consumer uses, unless such uses represent the only significant
+mode of use of the product.
+
+"Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to
+install and execute modified versions of a covered work in that User
+Product from a modified version of its Corresponding Source. The
+information must suffice to ensure that the continued functioning of
+the modified object code is in no case prevented or interfered with
+solely because modification has been made.
+
+If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information. But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or
+updates for a work that has been modified or installed by the
+recipient, or for the User Product in which it has been modified or
+installed. Access to a network may be denied when the modification
+itself materially and adversely affects the operation of the network
+or violates the rules and protocols for communication across the
+network.
+
+Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+### 7. Additional Terms.
+
+"Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law. If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it. (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.) You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders
+of that material) supplement the terms of this License with terms:
+
+- a) Disclaiming warranty or limiting liability differently from the
+ terms of sections 15 and 16 of this License; or
+- b) Requiring preservation of specified reasonable legal notices or
+ author attributions in that material or in the Appropriate Legal
+ Notices displayed by works containing it; or
+- c) Prohibiting misrepresentation of the origin of that material,
+ or requiring that modified versions of such material be marked in
+ reasonable ways as different from the original version; or
+- d) Limiting the use for publicity purposes of names of licensors
+ or authors of the material; or
+- e) Declining to grant rights under trademark law for use of some
+ trade names, trademarks, or service marks; or
+- f) Requiring indemnification of licensors and authors of that
+ material by anyone who conveys the material (or modified versions
+ of it) with contractual assumptions of liability to the recipient,
+ for any liability that these contractual assumptions directly
+ impose on those licensors and authors.
+
+All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10. If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term. If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions; the
+above requirements apply either way.
+
+### 8. Termination.
+
+You may not propagate or modify a covered work except as expressly
+provided under this License. Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License. If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+### 9. Acceptance Not Required for Having Copies.
+
+You are not required to accept this License in order to receive or run
+a copy of the Program. Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance. However,
+nothing other than this License grants you permission to propagate or
+modify any covered work. These actions infringe copyright if you do
+not accept this License. Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+### 10. Automatic Licensing of Downstream Recipients.
+
+Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License. You are not responsible
+for enforcing compliance by third parties with this License.
+
+An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations. If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License. For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+### 11. Patents.
+
+A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's "contributor version".
+
+A contributor's "essential patent claims" are all patent claims owned
+or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version. For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement). To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients. "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+A patent license is "discriminatory" if it does not include within the
+scope of its coverage, prohibits the exercise of, or is conditioned on
+the non-exercise of one or more of the rights that are specifically
+granted under this License. You may not convey a covered work if you
+are a party to an arrangement with a third party that is in the
+business of distributing software, under which you make payment to the
+third party based on the extent of your activity of conveying the
+work, and under which the third party grants, to any of the parties
+who would receive the covered work from you, a discriminatory patent
+license (a) in connection with copies of the covered work conveyed by
+you (or copies made from those copies), or (b) primarily for and in
+connection with specific products or compilations that contain the
+covered work, unless you entered into that arrangement, or that patent
+license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+### 12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under
+this License and any other pertinent obligations, then as a
+consequence you may not convey it at all. For example, if you agree to
+terms that obligate you to collect a royalty for further conveying
+from those to whom you convey the Program, the only way you could
+satisfy both those terms and this License would be to refrain entirely
+from conveying the Program.
+
+### 13. Use with the GNU Affero General Public License.
+
+Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+### 14. Revised Versions of this License.
+
+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 <https://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 <https://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 <https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/README.md b/README.md
@@ -0,0 +1,29 @@
+# SCOUT
+A game launcher.
+
+## Configuration
+SCOUT looks for configuration in `$XDG_CONFIG_HOME/scout`.
+
+- scout.ini
+- cards/*.ini
+
+### Cards
+Below is an example card file, `mygame.ini`.
+```
+[card]
+title=My Game
+description=Super cool, action-packed!
+command=mygame
+image=mygame.png
+```
+The chosen image must be in [farbeld](https://tools.suckless.org/farbfeld/)
+format. Why? Because it's easier to work with.
+
+## TODO
+- Support game covers
+- Clean up controller support
+
+## Planned
+- Automatically setup controls for supported games
+- SwayWM Integration
+ - Splitscreen support
diff --git a/guix.scm b/guix.scm
@@ -0,0 +1,24 @@
+(use-modules (guix packages)
+ (guix licenses)
+ (guix git)
+ (guix build-system meson)
+ (guix gexp)
+ (gnu packages)
+ (gnu packages gl)
+ (gnu packages linux)
+ (gnu packages pkg-config)
+ (mt packages games))
+
+(define scout
+ (package
+ (name "scout")
+ (version "0.1.0")
+ (source (git-checkout (url (dirname (current-filename)))))
+ (build-system meson-build-system)
+ (inputs (list pkg-config glfw-mc mesa libepoxy libinih))
+ (synopsis #f)
+ (description #f)
+ (home-page #f)
+ (license gpl3+)))
+
+scout
diff --git a/manifest.scm b/manifest.scm
@@ -0,0 +1,7 @@
+(use-modules (gnu packages code))
+
+(include "guix.scm")
+
+(concatenate-manifests
+ (list (package->development-manifest scout)
+ (packages->manifest (list indent))))
diff --git a/meson.build b/meson.build
@@ -0,0 +1,36 @@
+project('scout', 'c')
+
+# Fix math.h errors with glibc
+cc = meson.get_compiler('c')
+m_dep = cc.find_library('m', required : false)
+
+deps = [
+ dependency('glfw3'),
+ dependency('gl'),
+ dependency('epoxy'),
+ dependency('inih'),
+ m_dep
+]
+
+common_sources = files(
+ 'src/util.c',
+ 'src/config.c'
+)
+
+scout_dir = join_paths(get_option('datadir'), 'scout')
+install_subdir('shaders', install_dir : scout_dir)
+
+absolute_shader_dir = join_paths(get_option('prefix'), scout_dir, 'shaders')
+
+# Make shaders available to devenv
+devenv = environment()
+devenv.set('SCOUT_SHADER_PATH', join_paths(meson.current_source_dir(), 'shaders'))
+meson.add_devenv(devenv)
+
+executable(
+ 'scout',
+ common_sources + ['src/main.c'],
+ install : true,
+ dependencies : deps,
+ c_args : ['-DSHADER_PATH="@0@"'.format(absolute_shader_dir)]
+)
diff --git a/shaders/frag.glsl b/shaders/frag.glsl
@@ -0,0 +1,11 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec2 TexCoords;
+
+uniform sampler2D texture1;
+
+void main()
+{
+ FragColor = texture(texture1, TexCoords);
+}
diff --git a/shaders/vert.glsl b/shaders/vert.glsl
@@ -0,0 +1,20 @@
+#version 330 core
+
+layout (location = 0) in vec2 aPos;
+layout (location = 1) in vec2 aTex;
+
+out vec2 TexCoords;
+
+uniform vec2 scale;
+// xoffset, yoffset, heightscale, totalscale
+uniform vec4 trans;
+uniform vec2 camera;
+
+void main()
+{
+ gl_Position = vec4((aPos.x * trans.w + trans.x - camera.x) / scale.x,
+ (aPos.y * trans.z * trans.w + trans.y - camera.y) / scale.y,
+ 0.0,
+ 1.0);
+ TexCoords = aTex;
+}
diff --git a/src/config.c b/src/config.c
@@ -0,0 +1,156 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <string.h>
+#include <ini.h>
+
+#include "util.h"
+#include "config.h"
+
+#define MATCH(s, n) strcmp(section, s) == 0 && strcmp(name, n) == 0
+
+int cfg_handler(void *user, const char *section,
+ const char *name, const char *value)
+{
+ scout_cfg_t *pcfg = (scout_cfg_t *) user;
+
+ if (MATCH("menu", "name")) {
+ pcfg->name = strdup(value);
+ } else if (MATCH("theme", "bg")) {
+ int32_t color = parse_hex_color(value);
+ if (color >= 0)
+ pcfg->bg = convert_hex_color(color);
+ } else {
+ return 0;
+ }
+
+ return 1;
+}
+
+int card_handler(void *user, const char *section,
+ const char *name, const char *value)
+{
+ scout_card_t *pcard = (scout_card_t *) user;
+
+ if (strcmp(section, "card") == 0) {
+ if (strcmp(name, "title") == 0)
+ pcard->title = strdup(value);
+ else if (strcmp(name, "description") == 0)
+ pcard->description = strdup(value);
+ else if (strcmp(name, "command") == 0)
+ pcard->command = strdup(value);
+ else if (strcmp(name, "image") == 0)
+ pcard->image_path = strdup(value);
+ else
+ return 0;
+ } else {
+ return 0;
+ }
+
+ return 1;
+}
+
+int is_ini(struct dirent *entry)
+{
+ if (entry->d_type == DT_REG) {
+ size_t len_name = strlen(entry->d_name);
+
+ if (len_name < 5) {
+ return 0;
+ }
+
+ if (strcmp(entry->d_name + (len_name - 4), ".ini") == 0) {
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Load and parse configuration from the configuration file. Values found in the
+ * config file will override the existing values in the passed configuration.
+ * > $XDG_CONFIG_HOME/scout/scout.ini
+ *
+ * Also load and parse card files in the configuration directory.
+ * > $XDG_CONFIG_HOME/scout/cards/card.ini
+ */
+void load_config(scout_cfg_t *pcfg, unsigned int *num_cards,
+ scout_card_t **pcards)
+{
+ const char *path = getenv("XDG_CONFIG_HOME");
+ if (!path) {
+ fprintf(stderr, "XDG_CONFIG_HOME not set\n");
+ return;
+ }
+
+ int xdg_dir_fd = open(path, O_RDONLY | O_DIRECTORY);
+ if (xdg_dir_fd < 0) {
+ fprintf(stderr, "Unable to open XDG_CONFIG_HOME\n");
+ return;
+ }
+
+ int dir_fd = openat(xdg_dir_fd, "scout", O_RDONLY | O_DIRECTORY);
+ if (dir_fd < 0) {
+ fprintf(stderr, "Unable to open scout config directory\n");
+ return;
+ }
+
+ close(xdg_dir_fd);
+
+ /* Load and parse config file */
+ int config_fd = openat(dir_fd, "scout.ini", O_RDONLY);
+ if (config_fd < 0) {
+ fprintf(stderr, "Unable to open scout.ini\n");
+ close(dir_fd);
+ return;
+ }
+
+ char *buf = fdreadfile(config_fd);
+ ini_parse_string(buf, cfg_handler, pcfg);
+ free(buf);
+
+ close(config_fd);
+
+ /* Load and parse card files */
+ int subdir_fd = openat(dir_fd, "cards", O_RDONLY | O_DIRECTORY);
+ if (subdir_fd < 0) {
+ fprintf(stderr, "Unable to open scout/cards\n");
+ close(dir_fd);
+ return;
+ }
+ DIR *cards_dir = fdopendir(subdir_fd);
+
+ struct dirent *entry;
+
+ /* Count card entries */
+ size_t count = 0;
+ while ((entry = readdir(cards_dir)) != NULL)
+ if (is_ini(entry))
+ count++;
+
+ /* Allocate space for each card */
+ *num_cards = (unsigned int) count;
+ *pcards = malloc(count * sizeof(scout_card_t));
+
+ /* Rewind and parse card entries */
+ rewinddir(cards_dir);
+
+ count = 0;
+ while ((entry = readdir(cards_dir)) != NULL)
+ if (is_ini(entry)) {
+ int fd = openat(subdir_fd, entry->d_name, O_RDONLY);
+ char *buf = fdreadfile(fd);
+ scout_card_t card = DEFAULT_CARD;
+ ini_parse_string(buf, card_handler, &card);
+ free(buf);
+
+ (*pcards)[count++] = card;
+ }
+
+ closedir(cards_dir);
+
+ close(dir_fd);
+}
diff --git a/src/config.h b/src/config.h
@@ -0,0 +1,60 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#include "util.h"
+
+/* TODO: Automate config definitions with macros */
+typedef struct
+{
+ /* Main */
+ const char *name;
+
+ /* Theme */
+ scout_color_t bg;
+ scout_color_t bg2;
+ scout_color_t ui;
+ scout_color_t ui2;
+ scout_color_t ui3;
+ scout_color_t tx3;
+ scout_color_t tx2;
+ scout_color_t tx;
+ scout_color_t acc;
+ scout_color_t acc2;
+
+} scout_cfg_t;
+
+static const scout_cfg_t DEFAULT_CFG = {
+ /* Main */
+ .name = "SCOUT Launcher",
+
+ /* Theme */
+ .bg = HEX(0x100F0F),
+ .bg2 = HEX(0x1C1B1A),
+ .ui = HEX(0x282726),
+ .ui2 = HEX(0x343331),
+ .ui3 = HEX(0x403E3C),
+ .tx3 = HEX(0x575653),
+ .tx2 = HEX(0x878580),
+ .tx = HEX(0x878580),
+ .acc = HEX(0xDA702C),
+ .acc2 = HEX(0xBC5215)
+};
+
+typedef struct
+{
+ char *title;
+ char *description;
+ char *command;
+ char *image_path;
+} scout_card_t;
+
+static const scout_card_t DEFAULT_CARD = {
+ .title = "No Title",
+ .description = "No description...",
+ .command = "notify-send \"No command set\"",
+ .image_path = ""
+};
+
+void load_config(scout_cfg_t *pcfg, uint32_t *num_cards, scout_card_t **pcards);
+
+#endif
diff --git a/src/main.c b/src/main.c
@@ -0,0 +1,473 @@
+#include <epoxy/gl.h>
+#include <GLES3/gl3.h>
+#include <GLFW/glfw3.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+#include <arpa/inet.h>
+
+#include "util.h"
+#include "config.h"
+
+/* Private definitions */
+typedef struct {
+ float x;
+ float y;
+ float scale;
+} scout_instance_card_t;
+
+typedef struct {
+ float x;
+ float y;
+} scout_camera_t;
+
+/* Misc. globals */
+const char *title = "SCOUT";
+scout_cfg_t cfg = DEFAULT_CFG;
+
+scout_camera_t camera = {
+ .x = 0.0f,
+ .y = 0.0f
+};
+
+/* Card data */
+unsigned int num_cards = 0;
+unsigned int max_cards = 0;
+unsigned int current_card = 0;
+scout_card_t *cards;
+unsigned int *card_textures;
+float *card_ratios;
+float *card_offsets;
+
+/* Actions */
+int change_card = 0;
+int launch_card = 0;
+
+/* OpenGL variables */
+unsigned int vertex_shader;
+unsigned int fragment_shader;
+int scale_uniform;
+int trans_uniform;
+int camera_uniform;
+int texture_uniform;
+
+/* Load all shaders from file */
+void load_shaders()
+{
+ const char *path;
+ if (!(path = getenv("SCOUT_SHADER_PATH")))
+ path = SHADER_PATH;
+
+ int dir_fd = open(path, O_RDONLY | O_DIRECTORY);
+ if (dir_fd < 0) {
+ fprintf(stderr, "Unable to open shader path \"%s\"\n", path);
+ return;
+ }
+
+ int vert_fd = openat(dir_fd, "vert.glsl", O_RDONLY);
+ if (vert_fd < 0) {
+ fprintf(stderr, "Unable to open vertex shader\n");
+ return;
+ }
+
+ int frag_fd = openat(dir_fd, "frag.glsl", O_RDONLY);
+ if (frag_fd < 0) {
+ fprintf(stderr, "Unable to open fragment shader\n");
+ return;
+ }
+
+ int success;
+
+ const char *vert_source = fdreadfile(vert_fd);
+
+ vertex_shader = glCreateShader(GL_VERTEX_SHADER);
+ glShaderSource(vertex_shader, 1, &vert_source, NULL);
+ glCompileShader(vertex_shader);
+
+ glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &success);
+ if (!success) {
+ fprintf(stderr, "Failed to compile vertex shader!\n");
+ return;
+ }
+
+ const char *frag_source = fdreadfile(frag_fd);
+
+ fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
+ glShaderSource(fragment_shader, 1, &frag_source, NULL);
+ glCompileShader(fragment_shader);
+
+ glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &success);
+ if (!success) {
+ fprintf(stderr, "Failed to compile fragment shader!\n");
+ return;
+ }
+
+ fprintf(stderr, "Compiled shaders\n");
+}
+
+/* GLFW Callbacks */
+void error_callback(int error, const char *description)
+{
+ fprintf(stderr, "GLFW Error: %s\n", description);
+}
+
+void framebuffer_size_callback(GLFWwindow *window, int width, int height)
+{
+ glViewport(0, 0, width, height);
+ /* Apply aspect ratio */
+ float ratio = (float) width / (float) height;
+ fprintf(stderr, "Resized: %i x %i, max %f\n", width, height, ratio);
+ glUniform2f(scale_uniform, ratio, 1.0f);
+}
+
+/* TODO: Proper input management */
+void key_callback(GLFWwindow *window, int key, int scancode, int action,
+ int mods)
+{
+ if (key == GLFW_KEY_RIGHT && action == GLFW_PRESS) {
+ change_card = 1;
+ return;
+ }
+ if (key == GLFW_KEY_LEFT && action == GLFW_PRESS) {
+ change_card = -1;
+ return;
+ }
+ if (key == GLFW_KEY_ENTER && action == GLFW_PRESS) {
+ launch_card = 1;
+ return;
+ }
+}
+
+void joystick_callback(int jid, int event)
+{
+ if (!glfwJoystickIsGamepad(jid))
+ return;
+
+ if (event == GLFW_CONNECTED) {
+ fprintf(stderr, "Connected %d\n", jid);
+ } else if (event == GLFW_DISCONNECTED) {
+ fprintf(stderr, "Disconnected %d\n", jid);
+ }
+}
+
+int main()
+{
+ /* Initialize GLFW */
+ glfwSetErrorCallback(error_callback);
+
+ if (!glfwInit()) {
+ printf("Failed to initialize GLFW!\n");
+ return -1;
+ }
+
+ glfwSetJoystickCallback(joystick_callback);
+
+ /* Load configuration */
+ load_config(&cfg, &num_cards, &cards);
+ fprintf(stderr, "Loaded %d cards\n", num_cards);
+
+
+ /* Window creation */
+ GLFWwindow *window = glfwCreateWindow(640, 480, title, NULL, NULL);
+ if (!window) {
+ printf("Failed to create GLFW window!\n");
+ glfwTerminate();
+ return -1;
+ }
+ glfwMakeContextCurrent(window);
+
+ glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+ glfwSetKeyCallback(window, key_callback);
+
+ /* Controller setup */
+ for (int i = 0; i < GLFW_JOYSTICK_LAST; i++) {
+ if (glfwJoystickPresent(i) && glfwJoystickIsGamepad(i)) {
+ fprintf(stderr, "Controller %d available\n", i);
+ }
+ }
+
+ /* Set up shaders */
+ load_shaders();
+
+ unsigned int shader_program = glCreateProgram();
+
+ glAttachShader(shader_program, vertex_shader);
+ glAttachShader(shader_program, fragment_shader);
+ glLinkProgram(shader_program);
+
+ glDeleteShader(vertex_shader);
+ glDeleteShader(fragment_shader);
+
+ /* Uniforms */
+ scale_uniform = glGetUniformLocation(shader_program, "scale");
+ trans_uniform = glGetUniformLocation(shader_program, "trans");
+ camera_uniform = glGetUniformLocation(shader_program, "camera");
+
+ texture_uniform = glGetUniformLocation(shader_program, "texture1");
+
+ /* Set up vertex data and configure vertex attributes */
+ float vertices[] = {
+ 0.5f, 0.5f, 1.0f, 0.0f,
+ 0.5f, -0.5f, 1.0f, 1.0f,
+ -0.5f, -0.5f, 0.0f, 1.0f,
+ -0.5f, 0.5f, 0.0f, 0.0f
+ };
+ unsigned int indices[] = {
+ 0, 1, 2,
+ 2, 3, 0
+ };
+
+ /* Create vertex arrays, buffers, etc. */
+ unsigned int VBO, EBO, VAO;
+ glGenVertexArrays(1, &VAO);
+ glGenBuffers(1, &VBO);
+ glGenBuffers(1, &EBO);
+
+ glBindVertexArray(VAO);
+
+ glBindBuffer(GL_ARRAY_BUFFER, VBO);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices,
+ GL_STATIC_DRAW);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+ glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices,
+ GL_STATIC_DRAW);
+
+ /* Vertex coordinates */
+ glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float),
+ (void *) 0);
+ glEnableVertexAttribArray(0);
+ /* Texture coordinates */
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float),
+ (void *) (2 * sizeof(float)));
+ glEnableVertexAttribArray(1);
+
+ /* Create cards */
+ card_ratios = malloc(num_cards * sizeof(float));
+ card_offsets = malloc(num_cards * sizeof(float));
+ card_textures = malloc(num_cards * sizeof(unsigned int));
+ glGenTextures(num_cards, card_textures);
+
+ for (unsigned int i = 0; i < num_cards; i++) {
+ printf(" %s\n", cards[i].title);
+
+ if (*cards[i].image_path != 0) {
+ /* Decode image */
+ int img_fd = open(cards[i].image_path, O_RDONLY);
+ if (img_fd < 0) {
+ continue;
+ }
+
+ unsigned int hdr[4];
+ read(img_fd, hdr, 16);
+
+ if (memcmp("farbfeld", hdr, sizeof("farbfeld") - 1) != 0)
+ continue;
+
+ unsigned int width = ntohl(hdr[2]);
+ unsigned int height = ntohl(hdr[3]);
+ size_t size = width * height * 8;
+ unsigned char *data = malloc(size);
+ read(img_fd, data, size);
+
+ close(img_fd);
+
+ /* Create OpenGL texture */
+ glBindTexture(GL_TEXTURE_2D, card_textures[i]);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_SHORT, data);
+
+ /* The texture is on GPU so we can release the decoded data. */
+ free(data);
+
+ /* Calculate the vertical scale of the image */
+ card_ratios[i] = (float) height / (float) width;
+ } else {
+ /* This is really ugly but that's also kinda the point... */
+ const unsigned char blah[16] = { 0xff, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0xff, 0xff };
+
+ /* Create OpenGL texture */
+ glBindTexture(GL_TEXTURE_2D, card_textures[i]);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, blah);
+
+ /* TODO: Use default image */
+ card_ratios[i] = 1.0f;
+ }
+ }
+
+ /* Main loop */
+ float counter = 0.0f;
+ float time = 0.0f;
+ float lastCheck = 0.0f;
+ float fps = 0.0f;
+
+ float dt = 0.0f;
+
+ GLFWgamepadstate state;
+ float move_cooldown_left = 0.0f;
+ float move_cooldown_right = 0.0f;
+ int down = 0;
+
+ /* Set background color */
+ glClearColor(cfg.bg.r, cfg.bg.g, cfg.bg.b, 1.0f);
+
+ while (!glfwWindowShouldClose(window)) {
+ /* Game Logic */
+ lastCheck = time;
+ time = glfwGetTime();
+ dt = time - lastCheck;
+
+ /* Controller setup */
+ for (int i = 0; i < GLFW_JOYSTICK_LAST; i++) {
+ if (!glfwJoystickIsGamepad(i))
+ continue;
+
+ glfwGetGamepadState(i, &state);
+
+ /* Avoid repeating inputs */
+ if (state.buttons[GLFW_GAMEPAD_BUTTON_A]) {
+ if (down != 1) {
+ launch_card = 1;
+ down = 1;
+ }
+ } else {
+ down = 0;
+ }
+
+ if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_RIGHT]
+ || state.axes[GLFW_GAMEPAD_AXIS_LEFT_X] > 0.01f) {
+ if (move_cooldown_left <= 0.0f) {
+ change_card = 1;
+ move_cooldown_left = 0.2f;
+ }
+ } else {
+ move_cooldown_left = 0.0f;
+ }
+
+ if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_LEFT]
+ || state.axes[GLFW_GAMEPAD_AXIS_LEFT_X] < -0.01f) {
+ if (move_cooldown_right <= 0.0f) {
+ change_card = -1;
+ move_cooldown_right = 0.2f;
+ }
+ } else {
+ move_cooldown_right = 0.0f;
+ }
+ }
+
+ move_cooldown_left -= dt;
+ move_cooldown_right -= dt;
+
+ /* Handle card change */
+ if (change_card != 0) {
+ if (change_card < 0 && current_card > 0) {
+ current_card--;
+ } else if (change_card > 0 && current_card < num_cards - 1) {
+ current_card++;
+ }
+
+ change_card = 0;
+ }
+
+ /* Animate cards */
+ for (int i = 0; i < num_cards; i++) {
+ if (i == current_card)
+ card_offsets[i] = exp_decay(card_offsets[i], 1.0f, 16.0f, dt);
+ else
+ card_offsets[i] = exp_decay(card_offsets[i], 0.0f, 16.0f, dt);
+ }
+
+ /* Smooth camera */
+ camera.x = exp_decay(camera.x, (float) current_card, 8.0f, dt);
+
+ /* Handle launching card */
+ if (launch_card) {
+ pid_t pid = fork();
+
+ if (pid == 0) {
+ char *const argv[] = {
+ "sh",
+ "-c",
+ cards[current_card].command,
+ NULL
+ };
+
+ execv("/bin/sh", argv);
+
+ printf("Error...");
+ _exit(127);
+ } else if (pid > 0) {
+ printf("Launched %s\n", cards[current_card].title);
+ } else {
+ printf("Error launching\n");
+ }
+
+ launch_card = 0;
+
+ /* TODO: Monitor child process */
+ }
+
+ /* Calculate FPS */
+ counter += 1.0f;
+
+ if (time - lastCheck >= 1.0f) {
+ fps = counter / (time - lastCheck);
+ //fprintf(stderr, "%.2f FPS\n", fps);
+ counter = 0.0f;
+ lastCheck = time;
+ }
+
+ /* Clear screen */
+ glClear(GL_COLOR_BUFFER_BIT);
+
+
+ /* Render */
+ glUseProgram(shader_program);
+
+ /* Update camera */
+ glUniform2f(camera_uniform, camera.x, camera.y);
+
+ /* Bind mesh */
+ glBindVertexArray(VAO);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+
+ for (int i = (current_card <= 2 ? 0 : current_card - 2); i < MIN(current_card + 3, num_cards); i++) {
+ glActiveTexture(GL_TEXTURE0);
+ glBindTexture(GL_TEXTURE_2D, card_textures[i]);
+
+ glUniform4f(trans_uniform, (float) i * 1.0f, card_ratios[i] * -0.5f * (1.0f - card_offsets[i]), card_ratios[i], 0.8f + card_offsets[i] * 0.2f);
+
+ glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+ }
+
+ glfwSwapBuffers(window);
+ glfwPollEvents();
+ }
+
+ fprintf(stderr, "Closing\n");
+
+ /* De-allocate GL resources when no longer needed */
+ glDeleteVertexArrays(1, &VAO);
+ glDeleteBuffers(1, &VBO);
+ glDeleteBuffers(1, &EBO);
+ glDeleteProgram(shader_program);
+
+ /* TODO: Dealloc configuration */
+ free(card_ratios);
+ free(card_offsets);
+ free(card_textures);
+
+ glfwTerminate();
+}
diff --git a/src/util.c b/src/util.c
@@ -0,0 +1,83 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <math.h>
+
+#include "util.h"
+
+/* This is a super-fast hex character value lookup table. */
+static const int8_t hextable[] = {
+ [0 ... 255] = -1,
+ ['0'] = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+ ['A'] = 10, 11, 12, 13, 14, 15,
+ ['a'] = 10, 11, 12, 13, 14, 15
+};
+
+/*
+ * Parse an ASCII hex representation of a color into an int32_t. A negative
+ * value indicates that an error occured while parsing.
+ *
+ * If you need an OpenGL-compatible color, see convert_hex_color.
+ */
+int32_t parse_hex_color(const char *hex)
+{
+ int32_t raw = 0;
+ while (*hex && raw >= 0) {
+ raw = (raw << 4) | hextable[(uint8_t) * hex++];
+ }
+
+ return raw;
+}
+
+/*
+ * Extract red, green and blue values from an int32_t and convert then to OpenGL
+ * compatible float colors. Alpha is ignored since the signed bit is generally
+ * used to indicate errors.
+ */
+scout_color_t convert_hex_color(int32_t color)
+{
+ scout_color_t c;
+
+ c.r = (float) ((color >> 16) & 0xFF) / 255.0f;
+ c.g = (float) ((color >> 8) & 0xFF) / 255.0f;
+ c.b = (float) (color & 0xFF) / 255.0f;
+
+ return c;
+}
+
+/*
+ * Read from the given path into a newly allocated buffer.
+ * TODO: Handle errors
+ */
+char *readfile(char *path)
+{
+ FILE *fp = fopen(path, "r");
+ fseek(fp, 0, SEEK_END);
+ long length = ftell(fp);
+ fseek(fp, 0, SEEK_SET);
+ char *buffer = (char *) malloc(length);
+ fread(buffer, length, 1, fp);
+ fclose(fp);
+ return buffer;
+}
+
+/*
+ * Read from the given file descriptor into a newly allocated buffer.
+ */
+char *fdreadfile(int fd)
+{
+ off_t size = lseek(fd, 0, SEEK_END);
+ lseek(fd, 0, SEEK_SET);
+ char *buf = malloc(size + 1);
+ read(fd, buf, size);
+ buf[size] = '\0';
+
+ return buf;
+}
+
+/* Decay is approx 1...25, slow...fast */
+float exp_decay(float a, float b, float decay, float dt) {
+ return b + (a - b) * exp(-decay*dt);
+}
diff --git a/src/util.h b/src/util.h
@@ -0,0 +1,36 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <stdint.h>
+#include <stdio.h>
+
+#define MAX(x, y) (((x) > (y)) ? (x) : (y))
+#define MIN(x, y) (((x) < (y)) ? (x) : (y))
+
+typedef struct {
+ unsigned int width;
+ unsigned int height;
+ unsigned short *data;
+} scout_image_t;
+
+typedef struct {
+ float r;
+ float g;
+ float b;
+} scout_color_t;
+
+#define HEX(hex) ( (scout_color_t){ \
+ .r = ((float)(((hex) >> 16) & 0xFF)) / 255.0f, \
+ .g = ((float)(((hex) >> 8) & 0xFF)) / 255.0f, \
+ .b = ((float)( (hex) & 0xFF)) / 255.0f \
+})
+
+int32_t parse_hex_color(const char *buf);
+scout_color_t convert_hex_color(int32_t color);
+
+char *readfile(char *path);
+char *fdreadfile(int fd);
+
+float exp_decay(float a, float b, float decay, float dt);
+
+#endif
