mr4th-public
/
standalone_srgb_antialiasing
1
Fork 0
Code Issues Releases Activity

setup the srgb anti-aliasing experiments standalone program

main
Allen Webster 2023-04-24 19:12:55 -07:00
commit 4aa71a8e0f
14 changed files with 2272 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.gitignore vendored Normal file
View File

@ -0,0 +1 @@
build/*

674
LICENSE-GPL-3.txt Normal file
View File

@ -0,0 +1,674 @@
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>.

25
README.md Normal file
View File

@ -0,0 +1,25 @@
### Copyright
Copyright (C) 2023 Allen Webster <https://mr4th.com>
Distributed with GPL 3 license (full license in LICENSE-GPL-3.txt)
### Contact
allenw@mr4th.com
### Purpose
This is a standalone Win32 OpenGL application that works as a set of
experiments to demonstrate the behavior and effect of SRGB conversions
and antialiasing techniques
In the final output program, the left side shows the gamma-naive results
where no SRGB conversions are applied to input colors or to output colors.
The right side shows the gamma-aware results where input colors are converted
from SRGB to Linear RGB, and output colors are converted from Linear RGB to
SRGB.
From top to bottom the experiments are:
1. A gradient which goes white (1,1,1) to black (0,0,0)
interpolated linearly by
alpha = (x - left)/(right - left)
color = (1,1,1)*(1 - alpha) + (0,0,0)*(alpha)

1
bin/bld/.gitignore vendored Normal file
View File

@ -0,0 +1 @@
local/*

26
bin/bld/bld_cmd.sh Normal file
View File

@ -0,0 +1,26 @@
#!/bin/bash
###### Parse Arguments ########################################################
command=$1
args=()
for ((i=2; i<=$#; i+=1)); do
args+=(${!i})
done
###### Source the Core ########################################################
bld_path="$(dirname $(realpath "$0"))"
source "$bld_path/bld_core.sh"
###### Dispatch ###############################################################
if [ "$command" == "cmp" ]; then
bld_compile "${args[@]}"
elif [ "$command" == "lnk" ]; then
bld_link "${args[@]}"
elif [ "$command" == "lib" ]; then
bld_lib "${args[@]}"
elif [ "$command" == "unit" ]; then
bld_unit "${args[@]}"
else
echo "unknown command '$command'"
fi

615
bin/bld/bld_core.sh Normal file
View File

@ -0,0 +1,615 @@
#!/bin/bash
###### Usage ##################################################################
# This script is meant to be invoked by the 'source' command. The variable
# bld_path should first be set to contain the path to the root folder of the
# bld system:
# bld_path="$(dirname $(realpath "$0"))"/<path-from-here-to-bld>
# source "$bld_path/bld_core.sh"
#
#
# The following bld functions form the core "bld commands":
# bld_compile, bld_link, bld_lib, bld_unit
#
# And there are several more helper functions:
# bld_print_implicit_opts, bld_load_local_opts
#
#
# Signatures:
# bld_compile <source-file> <zero-or-more-options>
# bld_link <out-name> <one-or-more-source-files-objs-or-libs> -- <zero-or-more-options>
# bld_lib <out-name> <one-or-more-source-files-or-objs> -- <zero-or-more-options>
# bld_unit <source-file> <zero-or-more-options>
#
# bld_print_implicit_opts (no arguments)
# bld_load_local_opts (no arguments)
#
#
# Shared notes for all:
# + Options are gathered from the command line, from the local context, and
# in the case of the commands bld_compile and bld_unit, from the source file.
# + Options in source files are specified between the strings //$ and //.
# Object files and library files should be specified with the extensions
# .obj and .lib respectively. The system automatically modifies the names to
# match the naming used by the selected context.
# + When the option "diagnostics" is included extra details will be printed
# from the bld commands. Showing the full list of options, invokation lines,
# and the build path.
#
# bld_compile:
# + Creates an object file from a single source file via the selected compiler.
#
# bld_link:
# + Creates executables and shared binaries from source files, object files,
# and static libraries. First uses the bld_compile command on the source files.
# Uses the selected linker.
# + The output is a shared binary (.dll or .so) when the option "dll" is
# included.
#
# bld_lib:
# + Creates a static library from source files and object files. First uses
# the bld_compile command on the source files. Uses the OS to determine the
# correct archiver.
#
# bld_unit:
# + Creates an executable (or shared binary) from a single source file.
# This command essentially does a single bld_compile then bld_link. With
# two differences:
# 1. The options from the source file are visible to the bld_link.
# 2. The name of the executable is determined either from the first option
# in the list or from the source file name if there are no options.
#
# bld_print_implicit_opts:
# + Shows the implicit options loaded from the local parameters script.
#
# bld_load_local_opts:
# + It is possible and sometimes useful to modify the local parameters after
# they are loaded to create certain kinds of build scripts. This function
# resets the local parameters to their original states by rerunning the
# local parameters script.
###### Flags From Opts ########################################################
function bld_flags_from_opts {
###### parse arguments ####################################################
local in_file=$1
local opts=()
for ((i=2; i<=$#; i+=1)); do
opts+=(${!i})
done
###### load file ##########################################################
local flags_raw=()
IFS=$'\r\n' GLOBIGNORE='*' command eval 'flags_raw=($(cat $in_file))'
###### filter #############################################################
local flags=()
for ((i=0;i<${#flags_raw[@]};i+=1)); do
local flag=${flags_raw[i]}
###### skip blanks and comments #######################################
if [[ -z "${flag// }" ]]; then
continue
fi
if [[ "${flag:0:1}" == "#" ]]; then
continue
fi
###### parse line filters #############################################
local line_filters=()
while [[ $flag = *">"* ]]; do
line_filters+=("${flag%%>*}")
flag="${flag#*>}"
done
###### check filters ##################################################
local can_include=1
for ((j=0;j<${#line_filters[@]};j+=1)); do
can_include=0
for ((k=0;k<${#opts[@]};k+=1)); do
if [[ ${opts[k]} = ${line_filters[j]} ]]; then
can_include=1
break
fi
done
if [[ "$can_include" = "0" ]]; then
break
fi
done
if [[ "$can_include" = "1" ]]; then
flags+=("${flag}")
fi
done
echo "${flags[@]}"
}
###### Opts From Src ##########################################################
function bld_opts_from_src {
###### split file into tokens #############################################
local in_file=$1
local tokens=($(grep "//\\$" $in_file))
###### parse ##############################################################
local in_params_range="0"
local params=()
for ((i=0; i<${#tokens[@]}; i+=1)); do
local string="${tokens[i]}"
if [[ "$in_params_range" == "0" ]]; then
if [[ "$string" == "//$" ]]; then
in_params_range="1"
fi
elif [[ "$in_params_range" == "1" ]]; then
if [[ "${string:0:2}" == "//" ]]; then
break
fi
params+=($string)
fi
done
echo "${params[@]}"
}
###### Dedup ##################################################################
function bld_dedup {
###### parse arguments ####################################################
local in=()
for ((i=1; i<=$#; i+=1)); do
in+=(${!i})
done
###### dedup ##############################################################
local out=()
for ((i=0; i<${#in[@]}; i+=1)); do
local string=${in[i]}
local is_dup="0"
for ((j=0; j<${#out[@]}; j+=1)); do
if [[ "$string" == "${out[j]}" ]]; then
is_dup="1"
break
fi
done
if [[ "$is_dup" == "0" ]]; then
out+=($string)
fi
done
echo "${out[@]}"
}
###### Has Opt ################################################################
function bld_has_opt {
###### parse arguments ####################################################
local key_opt=$1
local opts=()
for ((i=2; i<=$#; i+=1)); do
opts+=(${!i})
done
###### scan ###############################################################
local has_key=0
for ((i=0;i<${#opts[@]};i+=1)); do
local opt=${opts[i]}
if [[ "$opt" == "$key_opt" ]]; then
has_key=1
break
fi
done
echo $has_key
}
###### Load Local Options #####################################################
function bld_load_local_opts {
###### os cracking ########################################################
os="undefined"
if [ "$OSTYPE" == "win32" ] ||
[ "$OSTYPE" == "msys" ]; then
os="windows"
elif [ "$OSTYPE" == "linux-gnu" ]; then
os="linux"
elif [ "$OSTYPE" == "darwin" ]; then
os="mac"
fi
###### load parameters from the local script ################################
if [ -f "$local_path/bld_params.sh" ]; then
source "$local_path/bld_params.sh"
fi
}
###### Implicit Opts ##########################################################
function bld_implicit_opts {
echo $compiler $compile_mode $os $arch $linker $ctx_opts
}
###### Print Implicit Options #################################################
function bld_print_implicit_opts {
local opts=($(bld_implicit_opts))
local bracketed=()
for ((i=0; i<=${#opts[@]}; i+=1)); do
local opt="${opts[i]}"
if [ "$opt" != "" ]; then
bracketed+=("[${opts[i]}]")
fi
done
echo "${bracketed[@]}"
}
###### Compile ################################################################
function bld_compile {
###### parse arguments ####################################################
local in_file=$1
local opts=()
for ((i=2; i<=$#; i+=1)); do
opts+=(${!i})
done
if [ "$in_file" == "" ]; then
echo "compile: missing input file"
return 1
fi
###### finish in file #####################################################
local final_in_file=$in_file
###### finish options #####################################################
local src_opts=($(bld_opts_from_src $final_in_file))
local impl_opts=($(bld_implicit_opts))
local all_opts=($(bld_dedup ${impl_opts[@]} ${opts[@]} ${src_opts[@]}))
###### diagnostics ########################################################
local diagnostics=$(bld_has_opt diagnostics ${all_opts[@]})
###### out file name ######################################################
local dot_ext_obj=$(bld_ext_obj)
local file_base=${final_in_file##*/}
local file_base_no_ext=${file_base%.*}
local out_file="$file_base_no_ext$dot_ext_obj"
###### get real flags #####################################################
local flags=$(bld_flags_from_opts $compiler_flags_path ${all_opts[@]})
###### move to output folder ##############################################
mkdir -p "$build_path"
cd $build_path
if [ "$diagnostics" == "1" ]; then
echo "build path: $build_path"
fi
###### delete existing object file ########################################
rm -f "$out_file_base.o"
rm -f "$out_file_base.obj"
###### final flags ########################################################
local final_flags="-c -I$src_path ${flags}"
###### compile ############################################################
if [ "$diagnostics" == "1" ]; then
echo "cmp $final_in_file -- ${all_opts[@]}"
echo $compiler "$final_in_file" $final_flags
fi
if [ "$compiler" == "clang" ]; then
echo "$file_base"
fi
$compiler "$final_in_file" $final_flags
# return of status from compiler is automatic here.
}
###### Link ###################################################################
function bld_link {
###### parse arguments ####################################################
local out_name=$1
local in_files=()
for ((i=2; i<=$#; i+=1)); do
if [ "${!i}" == "--" ]; then
break
fi
in_files+=(${!i})
done
local opts=()
for ((i+=1; i<=$#; i+=1)); do
opts+=(${!i})
done
if [ "$out_name" == "" ]; then
echo "link: missing output name"
return 1
fi
if [ "${#in_files}" == "0" ]; then
echo "link: missing input file(s)"
return 1
fi
###### finish options #####################################################
local impl_opts=($(bld_implicit_opts))
local all_opts=($(bld_dedup ${opts[@]} ${impl_opts[@]}))
###### diagnostics ########################################################
local diagnostics=$(bld_has_opt diagnostics ${all_opts[@]})
###### sort in files ######################################################
local in_src=()
local in_obj=()
local in_lib=()
for ((i=0; i<${#in_files[@]}; i+=1)); do
local file="${in_files[i]}"
local ext="${file##*.}"
if [[ "$ext" == "c" || "$ext" == "cpp" ]]; then
in_src+=($file)
elif [[ "$ext" == "o" || "$ext" == "obj" ]]; then
in_obj+=($file)
elif [[ "$ext" == "lib" ]]; then
in_lib+=($file)
else
echo "WARNING: ignoring unrecognized file type $file"
fi
done
###### auto correct object files ##########################################
local dot_ext_obj=$(bld_ext_obj)
for ((i=0; i<${#in_obj[@]}; i+=1)); do
local file_name="${in_obj[i]}"
local base_name="${file_name%.*}"
in_obj[$i]="$base_name$dot_ext_obj"
done
###### compile source files ###############################################
for ((i=0; i<${#in_src[@]}; i+=1)); do
bld_compile "${in_src[i]}" ${all_opts[@]}
local status=$?
if [ $status -ne 0 ]; then
return $status
fi
done
###### intermediate object files ##########################################
local interm_obj=()
for ((i=0; i<${#in_src[@]}; i+=1)); do
local file_name="${in_src[i]}"
local base_name="${file_name##*/}"
local base_name_no_ext="${base_name%.*}"
interm_obj+=($base_name_no_ext$dot_ext_obj)
done
###### get real flags #####################################################
local flags=$(bld_flags_from_opts $linker_flags_path ${all_opts[@]})
###### out file name ######################################################
local dot_ext_out=""
local is_dll=$(bld_has_opt dll ${all_opts[@]})
if [ "$is_dll" == "0" ]; then
dot_ext_out=$(bld_ext_exe)
else
dot_ext_out=$(bld_ext_dll)
fi
out_file="$out_name$dot_ext_out"
###### move to output folder ##############################################
mkdir -p "$build_path"
cd $build_path
if [ "$diagnostics" == "1" ]; then
echo "build path: $build_path"
fi
###### final files to linker ##############################################
local final_in_files="${interm_obj[@]} ${in_obj[@]} ${in_lib[@]}"
###### set first diagnostic string ########################################
local first_diagnostic_string="lnk $final_in_files -- ${all_opts[@]}"
###### link ###############################################################
local status=0
local invokation=""
if [[ "$linker" == "link" || "$linker" == "lld-link" ]]; then
invokation="$linker -OUT:$out_file $flags $final_in_files"
elif [ "$linker" == "clang" ]; then
invokation="$linker -o \"$out_file\" $flags $final_in_files"
else
echo "ERROR: invokation not defined for this linker"
status=1
fi
if [ "$invokation" != "" ]; then
if [ "$diagnostics" == "1" ]; then
echo $first_diagnostic_string
echo $invokation
fi
echo "$out_file"
$invokation
status=$?
fi
return $status
}
###### Library ################################################################
function bld_lib {
###### parse arguments ####################################################
local out_name=$1
local in_files=()
for ((i=2; i<=$#; i+=1)); do
if [ "${!i}" == "--" ]; then
break
fi
in_files+=(${!i})
done
local opts=()
for ((i+=1; i<=$#; i+=1)); do
opts+=(${!i})
done
if [ "$out_name" == "" ]; then
echo "lib: missing output name"
return 1
fi
if [ "${#in_files}" == "0" ]; then
echo "lib: missing input file(s)"
return 1
fi
###### finish options #####################################################
local impl_opts=($(bld_implicit_opts))
local all_opts=($(bld_dedup ${opts[@]} ${impl_opts[@]}))
###### diagnostics ########################################################
local diagnostics=$(bld_has_opt diagnostics ${all_opts[@]})
###### sort in files ######################################################
local in_src=()
local in_obj=()
for ((i=0; i<${#in_files[@]}; i+=1)); do
local file="${in_files[i]}"
local ext="${file##*.}"
if [[ "$ext" == "c" || "$ext" == "cpp" ]]; then
in_src+=($file)
elif [[ "$ext" == "o" || "$ext" == "obj" ]]; then
in_obj+=($file)
else
echo "WARNING: ingnoring unrecgonized file type $file"
fi
done
###### auto correct object files ##########################################
local dot_ext_obj=$(bld_ext_obj)
for ((i=0; i<${#in_obj[@]}; i+=1)); do
local file_name="${in_obj[i]}"
local base_name="${file_name%.*}"
in_obj[$i]=$base_name$dot_ext_obj
done
###### compile source files ###############################################
for ((i=0; i<${#in_src[@]}; i+=1)); do
bld_compile "${in_src[i]}" ${all_opts[@]}
local status=$?
if [ $status -ne 0 ]; then
return $status
fi
done
###### intermediate object files ##########################################
local interm_obj=()
for ((i=0; i<${#in_src[@]}; i+=1)); do
local file_name="${in_src[i]}"
local base_name="${file_name##*/}"
local base_name_no_ext="${base_name%.*}"
interm_obj+=($base_name_no_ext$dot_ext_obj)
done
###### out file name ######################################################
local out_file=""
if [ "$os" == "windows" ]; then
out_file="$out_name.lib"
elif [ "$os" == "linux" || "$os" == "mac" ]; then
out_file="lib$out_name.a"
else
echo "ERROR: static library output not defined for OS: $os"
fi
###### final library build input files ####################################
local final_in_files="${interm_obj[@]} ${in_obj[@]}"
###### move to output folder ##############################################
mkdir -p "$build_path"
cd $build_path
if [ "$diagnostics" == "1" ]; then
echo "build path: $build_path"
fi
###### set first diagnostic string ########################################
local first_diagnostic_string="lib $final_in_files -- ${all_opts[@]}"
###### build library ######################################################
local status=0
if [ "$os" == "windows" ]; then
if [ "$diagnostics" == "1" ]; then
echo $first_diagnostic_string
echo lib -nologo -OUT:"$out_file" $final_in_files
fi
echo "$out_file"
lib -nologo -OUT:"$out_file" $final_in_files
status=$?
elif [ "$os" == "linux" || "$os" == "mac" ]; then
# TODO(allen): invoke ar here - make sure to delete the original .a first
# because ar does not (seem) to replace the output file, just append
echo "TODO: implement ar path in bld_core.sh:bld_lib"
status=1
else
echo "ERROR: static library invokation not defined for OS: $os"
status=1
fi
return $status
}
###### Unit ###################################################################
function bld_unit {
###### parse arguments ####################################################
local main_file=$1
local opts=()
for ((i=2; i<=$#; i+=1)); do
opts+=(${!i})
done
if [ "$main_file" == "" ]; then
echo "unit: missing main file"
return 1
fi
###### set out name #######################################################
local out_name=""
if [ "${#opts}" == "0" ]; then
local file_base=${main_file##*/}
local file_base_no_ext=${file_base%.*}
out_name=$file_base_no_ext
else
out_name="${opts[0]}"
fi
###### finish options #####################################################
local src_opts=$(bld_opts_from_src $main_file)
local impl_opts=($(bld_implicit_opts))
local all_opts=($(bld_dedup $out_name ${opts[@]} ${src_opts[@]} ${impl_opts[@]}))
###### link ###############################################################
bld_link $out_name $main_file ${in_files[@]} -- ${all_opts[@]}
}
###### Special Ifs ############################################################
function bld_ext_obj {
echo $(bld_flags_from_opts $file_extensions_path $compiler obj)
}
function bld_ext_exe {
echo $(bld_flags_from_opts $file_extensions_path $os exe)
}
function bld_ext_dll {
echo $(bld_flags_from_opts $file_extensions_path $os dll)
}
###### Get Paths ##############################################################
if [ ! -f "$bld_path/bld_core.sh" ]; then
echo bld_path set incorrectly
exit 1
fi
local_path="$bld_path/local"
###### Load Locals ############################################################
bld_load_local_opts
# NOTES - for future iterations of this system
# + The "source" approach creates problems for locating the bld path because
# when a script is "sourced" it inherits the $0 from the "caller". Two ideas:
# 1. There may be a way to fix this issue relating to passing parameters
# to the "sourced" script
# 2. Setup a locator script that can be called the normal way before sourcing
# the core to save the bld_path for the core to see
# + It would be nice to include an automatic slash fixer \ -> /

6
bin/bld/bld_init.sh Normal file
View File

@ -0,0 +1,6 @@
#!/bin/bash
bld_path=$(dirname "$0")
local_path="$bld_path/local"
mkdir -p "$local_path"
cp $bld_path/default.bld_params.sh $local_path/bld_params.sh

16
bin/bld/default.bld_params.sh Normal file
View File

@ -0,0 +1,16 @@
#!/bin/bash
compiler="cl"
compile_mode="debug"
arch="x64"
linker="lld-link"
ctx_opts=""
cd $bld_path/../..
root_path=$PWD
build_path="$root_path/build"
src_path="$root_path/src"
compiler_flags_path="$root_path/bin/compiler_flags.txt"
linker_flags_path="$root_path/bin/linker_flags.txt"
file_extensions_path="$root_path/bin/file_extensions.txt"

7
bin/build_experiments.sh Normal file
View File

@ -0,0 +1,7 @@
#!/bin/bash
bld_path="$(dirname $(realpath "$0"))"/bld
source "$bld_path/bld_core.sh"
bld_print_implicit_opts
bld_unit $src_path/standalone_srgb_antialiasing_experiments.c experiments

13
bin/compiler_flags.txt Normal file
View File

@ -0,0 +1,13 @@
###### CL #####################################################################
cl>-FC
cl>-GR-
cl>-EHa
cl>-nologo
###### Clang ##################################################################
clang>-Wno-writable-strings
clang>-Wno-switch
###### Debug ##################################################################
cl>debug>-Zi

10
bin/file_extensions.txt Normal file
View File

@ -0,0 +1,10 @@
obj>cl>.obj
obj>clang>.o
obj>gcc>.o
exe>windows>.exe
dll>windows>.dll
dll>linux>.so
dll>mac>.so

18
bin/linker_flags.txt Normal file
View File

@ -0,0 +1,18 @@
###### link ###################################################################
lld-link>-nologo
lld-link>-DEFAULTLIB:libcmt
lld-link>-OPT:REF
lld-link>-INCREMENTAL:NO
lld-link>-DEBUG
lld-link>x64>-MACHINE:X64
lld-link>console>-SUBSYSTEM:CONSOLE
lld-link>graphical>-SUBSYSTEM:WINDOWS
windows>Winmm.lib
windows>Userenv.lib
windows>Advapi32.lib
windows>graphical>User32.lib
windows>graphical>Gdi32.lib
freetype>libfreetype.lib

32
project.4coder Normal file
View File

@ -0,0 +1,32 @@
version(2);
project_name = "foo";
patterns = {
"*.c",
"*.cpp",
"*.h",
"*.m",
"*.bat",
"*.sh",
"*.4coder",
};
blacklist_patterns = {
".*",
};
load_paths_base = {
{ ".", .relative = true, .recursive = true, },
};
load_paths = {
.win = load_paths_base,
};
commands = {
.build = { .out = "*compilation*", .footer_panel = true, .save_dirty_files = true,
.win = "git_bash bin/build_experiments.sh", },
.run = { .out = "*run*", .footer_panel = false, .save_dirty_files = false,
.win = "pushd build & experiments", },
};
fkey_command = {
.F1 = "build",
.F2 = "run",
};

828
src/standalone_srgb_antialiasing_experiments.c Normal file
View File

@ -0,0 +1,828 @@
#include <Windows.h>
////////////////////////////////
//- Mini-Base
#include <stdint.h>
typedef int8_t S8;
typedef int16_t S16;
typedef int32_t S32;
typedef int64_t S64;
typedef uint8_t U8;
typedef uint16_t U16;
typedef uint32_t U32;
typedef uint64_t U64;
typedef S8 B8;
typedef S16 B16;
typedef S32 B32;
typedef S64 B64;
typedef float F32;
typedef double F64;
#define AssertBreak() (*(volatile int*)0 = 0)
#define Assert(c) do{ if (!(c)){ AssertBreak(); } }while(0)
#define U64FromPtr(ptr) (U64)(ptr)
#define PtrFromU64(ptr) (void*)(x)
#define Member(T,m) ((T*)0)->m
#define PtrOffsetOf(T,m) (void*)(&Member(T,m))
#define OffsetOf(T,m) U64FromPtr(&Member(T,m))
#define allocate_array(T,c) (T*)(malloc(sizeof(T)*(c)))
////////////////////////////////
//- Types, Functions & Globals
static void error_message(char *msg);
//- wgl stuff
static HGLRC graphics_context = 0;
static HWND graphics_window = 0;
static HDC graphics_dc = 0;
static F32 graphics_w = 0;
static F32 graphics_h = 0;
static void wgl_helper_make_graphics_window(HINSTANCE hInstance);
static void wgl_helper_begin_render(void);
static void wgl_helper_end_render(void);
//- opengl render stuff
typedef struct Vertex{
F32 px;
F32 py;
F32 cr;
F32 cg;
F32 cb;
F32 ca;
} Vertex;
static void opengl_render_init(void);
static void opengl_draw_test_geometry(Vertex *v, U64 count);
////////////////////////////////
//- GL Definitions
//- gl types
typedef U32 GLenum;
typedef F32 GLfloat;
typedef U32 GLbitfield;
typedef U32 GLuint;
typedef S32 GLint;
typedef S32 GLsizei;
typedef S64 GLsizeiptr;
typedef S64 GLintptr;
typedef char GLchar;
typedef unsigned char GLboolean;
//- gl constants
#define GL_COLOR_BUFFER_BIT 0x00004000
#define GL_TRIANGLES 0x0004
#define GL_FLOAT 0x1406
#define GL_MULTISAMPLE 0x809D
#define GL_STREAM_DRAW 0x88E0
#define GL_ARRAY_BUFFER 0x8892
#define GL_FRAGMENT_SHADER 0x8B30
#define GL_VERTEX_SHADER 0x8B31
#define GL_COMPILE_STATUS 0x8B81
#define GL_LINK_STATUS 0x8B82
#define GL_INFO_LOG_LENGTH 0x8B84
#define GL_SRGB 0x8C40
//- gl func x-list
#define GL_FUNC_X_LIST() \
/* common stuff */ \
X(glGetError, GLenum, (void)) \
X(glViewport, void, (GLint x, GLint y, GLsizei width, GLsizei height)) \
X(glScissor, void, (GLint x, GLint y, GLsizei width, GLsizei height)) \
X(glClearColor, void, (GLfloat r,GLfloat g,GLfloat b,GLfloat a)) \
X(glClear, void, (GLbitfield mask)) \
X(glBlendFunc, void, (GLenum sfactor, GLenum dfactor)) \
X(glBlendFuncSeparate, void, (GLenum srcRGB,GLenum dstRGB,GLenum srcAlpha,GLenum dstAlpha)) \
X(glBlendEquation, void, (GLenum mode)) \
X(glBlendEquationSeparate, void, (GLenum modeRGB, GLenum modeAlpha)) \
X(glDisable, void, (GLenum cap)) \
X(glEnable, void, (GLenum cap)) \
X(glPixelStorei, void, (GLenum pname, GLint param)) \
X(glReadPixels, void, (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void *pixels)) \
/* buffers */ \
X(glGenBuffers, void, (GLsizei n, GLuint *buffers)) \
X(glDeleteBuffers, void, (GLsizei n, const GLuint *buffers)) \
X(glBindBuffer, void, (GLenum target, GLuint buffer)) \
X(glBufferData, void, (GLenum target, GLsizeiptr size, const void *data, GLenum usage)) \
X(glBufferSubData, void, (GLenum target, GLintptr offset, GLsizeiptr size, const void *data)) \
X(glGenVertexArrays, void, (GLsizei n, GLuint *arrays)) \
X(glDeleteVertexArrays, void, (GLsizei n, const GLuint *arrays)) \
X(glBindVertexArray, void, (GLuint array)) \
/* textures */ \
X(glActiveTexture, void, (GLenum texture)) \
X(glDeleteTextures, void, (GLsizei n, const GLuint *textures)) \
X(glBindTexture, void, (GLenum target, GLuint texture)) \
X(glIsTexture, GLboolean, (GLuint texture)) \
X(glTexParameteri, void, (GLenum target, GLenum pname, GLint param)) \
X(glTexImage1D, void, (GLenum target, GLint level, GLint internalformat, GLsizei width, GLint border, GLenum format, GLenum type, const void *pixels)) \
X(glTexImage2D, void, (GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const void *pixels)) \
X(glTexSubImage1D, void, (GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const void *pixels)) \
X(glTexSubImage2D, void, (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const void *pixels)) \
X(glTexImage2DMultisample, void, (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations)) \
/* shaders */ \
X(glAttachShader, void, (GLuint program, GLuint shader)) \
X(glCompileShader, void, (GLuint shader)) \
X(glCreateProgram, GLuint, (void)) \
X(glCreateShader, GLuint, (GLenum type)) \
X(glDeleteProgram, void, (GLuint program)) \
X(glDeleteShader, void, (GLuint shader)) \
X(glGetProgramiv, void, (GLuint program, GLenum pname, GLint *params)) \
X(glGetProgramInfoLog, void, (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog)) \
X(glGetShaderiv, void, (GLuint shader, GLenum pname, GLint *params)) \
X(glGetShaderInfoLog, void, (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog)) \
X(glLinkProgram, void, (GLuint program)) \
X(glShaderSource, void, (GLuint shader, GLsizei count, const GLchar *const*string, const GLint *length)) \
X(glUseProgram, void, (GLuint program)) \
X(glGetUniformLocation, GLint, (GLuint program, const GLchar *name)) \
/* draw calls */ \
X(glDrawArrays, void, (GLenum mode, GLint first, GLsizei count)) \
X(glDrawElements, void, (GLenum mode, GLsizei count, GLenum type, const void *indices)) \
X(glDrawArraysInstanced, void, (GLenum mode, GLint first, GLsizei count, GLsizei instancecount)) \
X(glDrawElementsInstanced, void, (GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei instancecount)) \
X(glEnableVertexAttribArray, void, (GLuint index)) \
X(glDisableVertexAttribArray, void, (GLuint index)) \
X(glVertexAttribPointer, void, (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const void *pointer)) \
X(glVertexAttribIPointer, void, (GLuint index, GLint size, GLenum type, GLsizei stride, const void *pointer)) \
X(glVertexAttribDivisor, void, (GLuint index, GLuint divisor)) \
X(glUniform1f, void, (GLint location, GLfloat v0)) \
X(glUniform2f, void, (GLint location, GLfloat v0, GLfloat v1)) \
X(glUniform3f, void, (GLint location, GLfloat v0, GLfloat v1, GLfloat v2)) \
X(glUniform4f, void, (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3)) \
X(glUniform1i, void, (GLint location, GLint v0)) \
X(glUniform1fv, void, (GLint location, GLsizei count, const GLfloat *value)) \
X(glUniform2fv, void, (GLint location, GLsizei count, const GLfloat *value)) \
X(glUniform3fv, void, (GLint location, GLsizei count, const GLfloat *value)) \
X(glDrawBuffers, void, (GLsizei n, const GLenum *bufs)) \
/* framebuffers */ \
X(glGenFramebuffers, void, (GLsizei n, GLuint *framebuffers)) \
X(glDeleteFramebuffers, void, (GLsizei n, const GLuint *framebuffers)) \
X(glBindFramebuffer, void, (GLenum target, GLuint framebuffer)) \
X(glIsFramebuffer, GLboolean, (GLuint framebuffer)) \
X(glCheckFramebufferStatus, GLenum, (GLenum target)) \
X(glFramebufferTexture1D, void, (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)) \
X(glFramebufferTexture2D, void, (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)) \
X(glFramebufferTexture3D, void, (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset)) \
X(glFramebufferRenderbuffer, void, (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer)) \
X(glFramebufferTexture, void, (GLenum target, GLenum attachment, GLuint texture, GLint level)) \
X(glBlitFramebuffer, void, (GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter)) \
X(glGetFramebufferAttachmentParameteriv, void, (GLenum target, GLenum attachment, GLenum pname, GLint *params))
//- gl function types
#define X(N,R,P) typedef R GL_##N P;
GL_FUNC_X_LIST()
#undef X
//- gl function pointers
#define X(N,R,P) static GL_##N * N = 0;
GL_FUNC_X_LIST()
#undef X
////////////////////////////////
//- OpenGL Helper Declarations
static GLuint opengl_helper_make_shader(char *src, GLenum shader_type);
static GLuint opengl_helper_make_program(GLuint *shaders, U32 count);
////////////////////////////////
//- OpenGL Render
static char test_vshader[] =
"#version 330\n"
"uniform vec2 u_view_xform;\n"
"layout (location = 0) in vec2 v_p;\n"
"layout (location = 1) in vec4 v_c;\n"
"out vec4 f_c;\n"
"void main(){\n"
"vec2 norm_pos = v_p*u_view_xform + vec2(-1.0, -1.0);\n"
"gl_Position = vec4(norm_pos, 0.0, 1.0);\n"
"f_c = v_c;\n"
"}\n"
;
static char test_fshader[] =
"#version 330\n"
"in vec4 f_c;\n"
"out vec4 out_color;\n"
"void main(){\n"
"out_color = f_c;\n"
"}\n"
"";
GLuint test_program = 0;
GLint test_u_view_xform = -1;
static void
opengl_render_init(void){
//- setup test shader program
{
GLuint shaders[2] = {0};
shaders[0] = opengl_helper_make_shader(test_vshader, GL_VERTEX_SHADER);
shaders[1] = opengl_helper_make_shader(test_fshader, GL_FRAGMENT_SHADER);
test_program = opengl_helper_make_program(shaders, 2);
test_u_view_xform = glGetUniformLocation(test_program, "u_view_xform");
}
{
GLuint vao = 0;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
}
{
GLuint vertex_buffer = 0;
glGenBuffers(1, &vertex_buffer);
glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer);
}
if (glGetError() != 0){
error_message("error in opengl renderer initialization");
}
}
static void
opengl_draw_test_geometry(Vertex *v, U64 count){
glBufferData(GL_ARRAY_BUFFER, sizeof(*v)*count, v, GL_STREAM_DRAW);
glUseProgram(test_program);
glUniform2f(test_u_view_xform, 2.f/graphics_w, 2.f/graphics_h);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, 0,
sizeof(Vertex), PtrOffsetOf(Vertex, px));
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 4, GL_FLOAT, 0,
sizeof(Vertex), PtrOffsetOf(Vertex, cr));
glDrawArrays(GL_TRIANGLES, 0, count);
}
////////////////////////////////
//- Main
int
WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nShowCmd){
wgl_helper_make_graphics_window(hInstance);
U64 frame_counter = 0;
for (;;){
// wait for input
MSG msg = {0};
BOOL get_message = GetMessage(&msg, 0, 0, 0);
if (get_message <= 0){
break;
}
DispatchMessage(&msg);
// begin render
wgl_helper_begin_render();
// initialization
if (frame_counter == 0){
opengl_render_init();
}
// screen layout
F32 margin = 10.f;
F32 center_x = graphics_w*0.5f;
F32 divider_half_w = 3.f;
F32 divider_min_x = (F32)(S32)(center_x - divider_half_w);
F32 divider_max_x = divider_min_x + 2.f*divider_half_w;
// render
{
glViewport(0, 0, (S32)graphics_w, (S32)graphics_h);
// black background everywhere
glClearColor(0.f, 0.f, 0.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT);
// draw divider
{
Vertex v[6];
v[0].px = divider_min_x; v[0].py = 0.f;
v[1].px = divider_min_x; v[1].py = graphics_h;
v[2].px = divider_max_x; v[2].py = 0.f;
v[3].px = v[1].px; v[3].py = v[1].py;
v[4].px = v[2].px; v[4].py = v[2].py;
v[5].px = divider_max_x; v[5].py = graphics_h;
for (U32 i = 0; i < 6; i += 1){
v[i].cr = 1.f;
v[i].cg = 1.f;
v[i].cb = 1.f;
v[i].ca = 1.f;
}
opengl_draw_test_geometry(v, 6);
}
}
// end render
wgl_helper_end_render();
// frame counter
frame_counter += 1;
}
return(0);
}
////////////////////////////////
//- OpenGL Helpers
static GLuint
opengl_helper_make_shader(char *src, GLenum shader_type){
// create shader
GLuint shader = glCreateShader(shader_type);
GLenum error = glGetError();
// set source
glShaderSource(shader, 1, &src, 0);
// compile
glCompileShader(shader);
// read log
GLint info_log_length = 0;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &info_log_length);
if (info_log_length > 0){
char *buffer = allocate_array(char, info_log_length + 1);
GLint length = 0;
glGetShaderInfoLog(shader, info_log_length + 1, &length, buffer);
error_message(buffer);
}
// check status
{
GLint compile_status = 0;
glGetShaderiv(shader, GL_COMPILE_STATUS, &compile_status);
if (compile_status == 0){
error_message("could not create one of the shaders");
}
}
return(shader);
}
static GLuint
opengl_helper_make_program(GLuint *shaders, U32 count){
// link program
GLuint program = glCreateProgram();
for (U32 i = 0; i < count; i += 1){
glAttachShader(program, shaders[i]);
}
glLinkProgram(program);
// read log
GLint info_log_length = 0;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &info_log_length);
if (info_log_length > 0){
char *buffer = allocate_array(char, info_log_length + 1);
GLint length = 0;
glGetProgramInfoLog(program, info_log_length + 1, &length, buffer);
error_message(buffer);
}
// check status
{
GLint link_status = 0;
glGetProgramiv(program, GL_LINK_STATUS, &link_status);
if (link_status == 0){
error_message("could not create one of the GPU programs");
}
}
return(program);
}
////////////////////////////////
//- WGL Definitions
#define WGL_DRAW_TO_WINDOW_ARB 0x2001
#define WGL_ACCELERATION_ARB 0x2003
#define WGL_SWAP_METHOD_ARB 0x2007
#define WGL_SUPPORT_OPENGL_ARB 0x2010
#define WGL_DOUBLE_BUFFER_ARB 0x2011
#define WGL_PIXEL_TYPE_ARB 0x2013
#define WGL_COLOR_BITS_ARB 0x2014
#define WGL_RED_BITS_ARB 0x2015
#define WGL_GREEN_BITS_ARB 0x2017
#define WGL_BLUE_BITS_ARB 0x2019
#define WGL_FULL_ACCELERATION_ARB 0x2027
#define WGL_SWAP_EXCHANGE_ARB 0x2028
#define WGL_TYPE_RGBA_ARB 0x202B
//- WGL_ARB_create_context constants
#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
#define WGL_CONTEXT_FLAGS_ARB 0x2094
#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
//- wgl funcs x-list
#define WGL_FUNCS_X_LIST() \
X(wglCreateContext, HGLRC, (HDC dc)) \
X(wglDeleteContext, BOOL, (HGLRC glrc)) \
X(wglMakeCurrent, BOOL, (HDC dc,HGLRC glrc)) \
X(wglGetProcAddress, PROC, (LPCSTR name))
//- wgl extension funcs x-list
#define WGL_EXT_FUNCS_X_LIST() \
X(wglChoosePixelFormatARB, BOOL, (HDC,int*,FLOAT*,UINT,int*,UINT*)) \
X(wglCreateContextAttribsARB, HGLRC, (HDC dc,HGLRC share,int*atri))
//- wgl function types
#define X(N,R,P) typedef R W32_##N P;
WGL_FUNCS_X_LIST()
WGL_EXT_FUNCS_X_LIST()
#undef X
//- wgl function pointers
#define X(N,R,P) static W32_##N * w32_##N = 0;
WGL_FUNCS_X_LIST()
WGL_EXT_FUNCS_X_LIST()
#undef X
////////////////////////////////
//- WGL Helper
#define GET_PROC_ADDR(v,m,s) (*(PROC*)(&(v))) = GetProcAddress((m),(s))
#define WGL_GET_PROC_ADDR(v,s) (*(PROC*)(&(v))) = w32_wglGetProcAddress(s)
#define GL_FULL_PROC_ADDR(v,m,s) (*(PROC*)(&(v))) = wgl_helper_load((m),(s))
#define BOOTSTRAP_WINDOW_CLASS_NAME L"mr4th-opengl-bootstrap"
#define GRAPHICS_WINDOW_CLASS_NAME L"mr4th-opengl-graphics"
static LRESULT
w32_graphics_window_proc(HWND wnd,
UINT msg,
WPARAM wparam,
LPARAM lparam){
LRESULT result = 0;
switch (msg){
case WM_CLOSE:
{
ExitProcess(0);
}break;
case WM_SIZE:
{
// Here we need to re-render IF we want the window not
// to have ugly black borders during resizing.
// begin render
HDC dc = GetDC(wnd);
w32_wglMakeCurrent(dc, graphics_context);
// render
glClearColor(1.f, 0.f, 1.f, 1.f);
glClear(GL_COLOR_BUFFER_BIT);
// end render
SwapBuffers(dc);
ReleaseDC(wnd, dc);
}break;
default:
{
result = DefWindowProcW(wnd, msg, wparam, lparam);
}break;
}
return(result);
}
static PROC
wgl_helper_load(HMODULE opengl_module, char *name){
PROC result = (PROC)GetProcAddress(opengl_module, name);
if (result == 0){
result = (PROC)w32_wglGetProcAddress(name);
}
return(result);
}
static void
wgl_helper_make_graphics_window(HINSTANCE hInstance){
//- load opengl module
HMODULE w32_opengl_module = LoadLibraryA("opengl32.dll");
if (w32_opengl_module == 0){
error_message("failed to initialize opengl32.dll");
}
//- load & check wgl functions
{
#define X(N,R,P) GET_PROC_ADDR(w32_##N, w32_opengl_module, #N);
WGL_FUNCS_X_LIST()
#undef X
B32 missing_wgl_func = 0;
#define X(N,R,P) if (w32_##N == 0){ missing_wgl_func = 1; }
WGL_FUNCS_X_LIST()
#undef X
if (missing_wgl_func){
error_message("failed to load wgl function(s)");
}
}
// register bootstrap class
WNDCLASSW bs_wnd_class = {0};
bs_wnd_class.lpfnWndProc = DefWindowProcW;
bs_wnd_class.hInstance = hInstance;
bs_wnd_class.lpszClassName = BOOTSTRAP_WINDOW_CLASS_NAME;
ATOM bs_atom = RegisterClassW(&bs_wnd_class);
if (bs_atom == 0){
error_message("failed to register bootstrap class");
}
// create bootstrap window
HWND bootstrap_window =
CreateWindowW(BOOTSTRAP_WINDOW_CLASS_NAME,
L"mr4th-opengl-bootstrap",
0, 0, 0, 0, 0, // style, x,y,w,h
0, 0, hInstance, 0 // parent, menu, inst, param
);
if (bootstrap_window == 0){
error_message("failed to create bootstrap window");
}
//- load wgl extension functions
{
HDC dc = GetDC(bootstrap_window);
// create bootstrap context
HGLRC hglrc = 0;
{
PIXELFORMATDESCRIPTOR format_desc = {0};
format_desc.nSize = sizeof(format_desc);
format_desc.nVersion = 1;
format_desc.dwFlags = PFD_SUPPORT_OPENGL;
format_desc.cColorBits = 24;
format_desc.cRedBits = 8;
format_desc.cRedShift = 0;
format_desc.cGreenBits = 8;
format_desc.cGreenShift = 8;
format_desc.cBlueBits = 8;
format_desc.cBlueShift = 16;
int format_idx = ChoosePixelFormat(dc, &format_desc);
if (format_idx != 0){
BOOL spf = SetPixelFormat(dc, format_idx, &format_desc);
if (spf){
hglrc = w32_wglCreateContext(dc);
}
}
}
if (hglrc == 0){
error_message("failed to create bootstrap context");
}
// load wgl extension functions
w32_wglMakeCurrent(dc, hglrc);
#define X(N,R,P) WGL_GET_PROC_ADDR(w32_##N, #N);
WGL_EXT_FUNCS_X_LIST()
#undef X
w32_wglMakeCurrent(0, 0);
// check wgl extension functions
B32 missing_wgl_ext_func = 0;
#define X(N,R,P) if (w32_##N == 0){ missing_wgl_ext_func = 1; }
WGL_EXT_FUNCS_X_LIST()
#undef X
// report error
if (missing_wgl_ext_func){
error_message("failed to load wgl extension function(s)");
}
// delete context
{
BOOL delete_context = w32_wglDeleteContext(hglrc);
Assert(delete_context);
}
// cleanup dc
ReleaseDC(bootstrap_window, dc);
}
//- destroy bootstrap window, and class
{
BOOL destroy_window = DestroyWindow(bootstrap_window);
Assert(destroy_window);
BOOL unregister = UnregisterClassW(BOOTSTRAP_WINDOW_CLASS_NAME, hInstance);
Assert(unregister);
}
//- register graphics class
WNDCLASSW gr_wnd_class = {0};
gr_wnd_class.lpfnWndProc = w32_graphics_window_proc;
gr_wnd_class.hInstance = hInstance;
gr_wnd_class.lpszClassName = GRAPHICS_WINDOW_CLASS_NAME;
ATOM gr_atom = RegisterClassW(&gr_wnd_class);
if (gr_atom == 0){
error_message("failed to register graphics class");
}
//- create graphics context
int format_idx = 0;
{
// create dummy window
HWND dummy_window =
CreateWindowW(GRAPHICS_WINDOW_CLASS_NAME,
L"DUMMY",
WS_TILEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, // x,y
CW_USEDEFAULT, CW_USEDEFAULT, // w,h
0, 0, hInstance, 0 // parent, menu, inst, param
);
if (dummy_window == 0){
error_message("failed to create dummy window");
}
HDC dc = GetDC(dummy_window);
// choose pixel format
int format_attribs[] = {
WGL_DRAW_TO_WINDOW_ARB, TRUE,
WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
WGL_SWAP_METHOD_ARB, WGL_SWAP_EXCHANGE_ARB,
WGL_SUPPORT_OPENGL_ARB, TRUE,
WGL_DOUBLE_BUFFER_ARB, TRUE,
WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
WGL_COLOR_BITS_ARB, 24,
WGL_RED_BITS_ARB, 8,
WGL_GREEN_BITS_ARB, 8,
WGL_BLUE_BITS_ARB, 8,
0
};
UINT num_formats = 0;
BOOL cpf = w32_wglChoosePixelFormatARB(dc, format_attribs, 0,
1, &format_idx, &num_formats);
if (cpf && num_formats > 0){
// set pixel format
PIXELFORMATDESCRIPTOR format_desc = {0};
BOOL spf = SetPixelFormat(dc, format_idx, &format_desc);
if (spf){
// create context
int attribs[] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 3,
WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
0
};
graphics_context = w32_wglCreateContextAttribsARB(dc, 0, attribs);
}
}
//- load & check gl functions
w32_wglMakeCurrent(dc, graphics_context);
#define X(N,R,P) GL_FULL_PROC_ADDR(N, w32_opengl_module, #N);
GL_FUNC_X_LIST()
#undef X
w32_wglMakeCurrent(0, 0);
B32 missing_gl_func = 0;
#define X(N,R,P) if (N == 0){ missing_gl_func = 1; }
GL_FUNC_X_LIST()
#undef X
if (missing_gl_func){
error_message("failed to load gl functions");
}
// cleanup
ReleaseDC(dummy_window, dc);
DestroyWindow(dummy_window);
}
if (graphics_context == 0){
error_message("failed to create graphics context");
}
//- create the window
graphics_window =
CreateWindowW(GRAPHICS_WINDOW_CLASS_NAME,
L"TITLE ME",
WS_TILEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, // x,y
CW_USEDEFAULT, CW_USEDEFAULT, // w,h
0, 0, hInstance, 0 // parent, menu, inst, param
);
if (graphics_window == 0){
error_message("failed to create graphics window");
}
//- set pixel format
{
HDC dc = GetDC(graphics_window);
PIXELFORMATDESCRIPTOR format_desc = {0};
SetPixelFormat(dc, format_idx, &format_desc);
ReleaseDC(graphics_window, dc);
}
//- make the window full screen
{
DWORD style = GetWindowLongW(graphics_window, GWL_STYLE);
HMONITOR mon = MonitorFromWindow(graphics_window, MONITOR_DEFAULTTOPRIMARY);
if (mon != 0){
MONITORINFO moninfo = {0};
moninfo.cbSize = sizeof(moninfo);
if (GetMonitorInfoW(mon, &moninfo)){
SetWindowLongW(graphics_window, GWL_STYLE, style & ~WS_TILEDWINDOW);
SetWindowPos(graphics_window, HWND_TOP,
moninfo.rcMonitor.left, moninfo.rcMonitor.top,
moninfo.rcMonitor.right - moninfo.rcMonitor.left,
moninfo.rcMonitor.bottom - moninfo.rcMonitor.top,
SWP_NOOWNERZORDER | SWP_FRAMECHANGED);
}
}
}
//- show the window
ShowWindow(graphics_window, SW_SHOW);
}
static void
wgl_helper_begin_render(void){
graphics_dc = GetDC(graphics_window);
w32_wglMakeCurrent(graphics_dc, graphics_context);
RECT rect = {0};
if (GetClientRect(graphics_window, &rect)){
graphics_w = (F32)(rect.right - rect.left);
graphics_h = (F32)(rect.bottom - rect.top);
}
}
static void
wgl_helper_end_render(void){
SwapBuffers(graphics_dc);
ReleaseDC(graphics_window, graphics_dc);
}
////////////////////////////////
//- Error Message
static void
error_message(char *msg){
MessageBoxA(0, msg, "Error", MB_OK);
ExitProcess(1);
}
//$ graphical //