This requires SDL >= 2.0.4.
Since <https://bugzilla.libsdl.org/show_bug.cgi?id=2464> was fixed in
SDL 2.0.4, SDL behaves as a CMake "config-file package", even if it was
not itself built using CMake: it installs a sdl2-config.cmake file to
${libdir}/cmake/SDL2, which tells CMake where to find SDL's headers and
library, analogous to a pkg-config .pc file.
As a result, we no longer need to copy/paste a "find-module package"
to be able to find a system copy of SDL >= 2.0.4 with find_package(SDL2).
Find-module packages are now discouraged by the CMake developers, in
favour of having upstream projects behave as config-file packages.
This results in a small API change: FindSDL2 used to set SDL2_INCLUDE_DIR
and SDL2_LIBRARY, but the standard behaviour for config-file packages is
to set <name>_INCLUDE_DIRS and <name>_LIBRARIES. Use the CONFIG keyword
to make sure we search in config-file package mode, and will not find a
FindSDL2.cmake in some other directory that implements the old interface.
In addition to deleting redundant code, this avoids some assumptions in
FindSDL2 about the layout of a SDL installation. The current libsdl2-dev
package in Debian breaks those assumptions; this is considered a bug
and will hopefully be fixed soon, but it illustrates how fragile these
assumptions can be. We can be more robust against different installation
layouts by relying on SDL's own CMake integration.
When linking to a copy of CMake in a non-standard location, users can
now set the SDL2_DIR or CMAKE_PREFIX_PATH environment variable to point
to it; previously, these users would have used the SDL2DIR environment
variable. This continues to be unnecessary if using matching system-wide
installations of CMake and SDL2, for example both from Debian.
This is based on the patch written by Simon McVittie for OpenJK:
52030235f0
commit bbfb934e80
Author: Rachael Alexanderson <madame-rachelle@users.noreply.github.com>
Date: Sun Dec 6 23:50:15 2020 -0500
- and now it builds! but ... does it run?
commit 67096c8966
Author: Rachael Alexanderson <madame-rachelle@users.noreply.github.com>
Date: Sun Dec 6 22:25:13 2020 -0500
- one more step closer to compile
commit 5a0c84dd2d
Author: Rachael Alexanderson <madame-rachelle@users.noreply.github.com>
Date: Sun Dec 6 22:13:39 2020 -0500
- set up dynamic opengl load for windows
commit 6ef8118b80
Author: Rachael Alexanderson <madame-rachelle@users.noreply.github.com>
Date: Sat Dec 5 16:38:53 2020 -0500
- allow compiling for win-arm64
commit 7d6f3797c4
Author: Rachael Alexanderson <madame-rachelle@users.noreply.github.com>
Date: Fri Dec 4 05:18:29 2020 -0500
- allow targeting ARM64 on Windows
Co-authored-by: Rachael Alexanderson <madame-rachelle@users.noreply.github.com>
* support for SSI container format - this is an obscure format used by a few Duke Nukem mods - added to have this subsystem identical between both engines.
* removed some dead wrapper code
* made the Open methods local to their implementations, this was never called virtually.
* new texture format: ANM - this reads the first frame of a Build-ANM movie as a texture.
* some preparations for indexed (paletted) rendering.
* optimization of the patch texture checker - do not read in the entire file if checking the initial header is sufficient for rejecting it.
* removed refreshFreq variable and related code. This only got into the backend because of stupid interpolation code in some of the Build games which has long been removed.
* save FixedBitArrays as base64 in savegames.
* allow indirections in the string table - by prefixing the language string with '$$' the remaining text is interpreted as another string label to resolve.
* constexpr in palette code, also replacing #defines with enums.
This included half the game state and lots of unneeded parts of the software renderer.
The two modules that are shared between softpoly and the classic software renderer have been moved to a neutral place.
