Cameron Gutman
After updating to SDL 2.0.9, I got a user report that my app was crashing when closing a SDL_WINDOW_FULLSCREEN window to return to my Qt-based UI. It looks like the dead SDL window is getting a spurious updateLayer call which is causing SDL to dereference a null SDL_WindowData pointer.
For some reason, this only happens when using SDL_WINDOW_FULLSCREEN and not windowed or SDL_WINDOW_FULLSCREEN_DESKTOP. I was also unsuccessful in my attempt to get a simple reproducer for this crash. The Session.cpp code is available 688c4a90d9/app/streaming/session.cpp but I slightly modified it (adding a SDL_PumpEvents() call at 1179 to immediately trigger the issue, otherwise it happened when Qt next pumped the event loop).
The crashing line is:
NSMutableArray *contexts = data->nscontexts;
Luke Dashjr
Bug 3993 was "fixed" by #undef'ing bool. But this breaks C99's stdbool.h bool too.
For example, mpv's build fails with:
../audio/out/ao_sdl.c:35:5: error: unknown type name ?bool?
It seems ill-advised to be #undef'ing *anything* here - what if the code including SDL_cpuinfo.h actually wants to use altivec?
Daniel Gibson
Even though my game (dhewm3) doesn't use SDL_INIT_JOYSTICK, SDL_PumpEvent() calls SDL_JoystickUpdate() which ends up calling hid_enumerate() every three seconds, and sometimes on my Win7 box hid_enumerate() takes about 5 seconds, which causes the whole game to freeze for that time.
maxxus
The Dualshock 3's motion sensors don't seem to be reported by the call to EVIOCGBIT but they still send EV_ABS events. Because they're not reported by EVIOCGBIT they're not assigned a proper axis ids and the default of 0 is used, which is the valid id for the left analog sticks left/right axis.
zen3d
While trying to build Pixie lisp (https://github.com/pixie-lang/pixie), which uses SDL for multimedia output, the mandelbrot example won't build. The problem is that internally pixie uses a templated function to dump a value, and gcc chokes because SDL_PIXELFORMAT_RGA8888 is an anonymous enum.
I solved the problem locally by changing from:
enum {
SDL_PIXELFORMAT_UNKNOWN,
... etc. ...
SDL_PIXELFORMAT_YUYV = ... etc ...
};
to:
typedef enum {
SDL_PIXELFORMAT_UNKNOWN,
... etc. ...
SDL_PIXELFORMAT_YUYV = ... etc ...
} SDL_PIXELFORMAT_ENUM;
The net result of this change is that the enum containing SDL_PIXELFORMAT_* is no longer an anonymous enum and can now be used by a templated function.
This local change fixes Pixie lisp for me.
I did notice that you use the idiom
typedef enum {
... etc ...
} SDL_FOO;
elsewhere in your code, so that change to SDL_PIXELFORMAT doesn't look like it would have a negative impact.
midwan
When trying to compile on a Raspberry Pi 3, running Raspbian Stretch (fully updated), a warning appears:
/home/pi/projects/SDL/src/test/SDL_test_memory.c: In function ?SDL_TrackAllocation?:
/home/pi/projects/SDL/src/test/SDL_test_memory.c:112:109: warning: format ?%llx? expects argument of type ?long long unsigned int?, but argument 5 has type ?unw_word_t {aka unsigned int}? [-Wformat=]
snprintf(entry->stack_names[stack_index], sizeof(entry->stack_names[stack_index]), "%s+0x%llx", sym, offset);
Joshua Root
The change resulting from Bug 4208 changed the compatibility_version of libSDL2 from 9.0.0 to 1.0.0. This is simply wrong.
This means that programs linked against 2.0.9 are considered by the dynamic linker to be compatible with all previous versions of libSDL2. This is not the case since new public symbols have been added.
The way compatibility_version and current_version are meant to work is:
* current_version increases every time the library changes in any way.
* compatibility_version is increased to match current_version whenever new public symbols are added.
Thus both versions should only ever increase. The solution to the Xcode project and autotools not having matching versions should have been to increase the version(s) in the Xcode project.
Reference: https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPFrameworks/Concepts/VersionInformation.html
Touch device types include SDL_TOUCH_DEVICE_DIRECT (a touch screen with window-relative coordinates for touches), SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE (a trackpad-style device with absolute device coordinates), and SDL_TOUCH_DEVICE_INDIRECT_RELATIVE (a trackpad-style device with screen cursor-relative coordinates).
Phone screens are an example of a direct device type. Mac trackpads are the indirect-absolute touch device type. The Apple TV remote is an indirect-relative touch device type.
For starters, we need to correctly respond to 0,0 configure after unsetting
fullscreen. Also, turns out that there should be no drawing calls at all
in between eglSwapBuffers and wl_egl_window_resize, as otherwise EGL can
already allocate a wrongly sized buffer for a next frame, so handle those
together.
Sylvain
SDL_android.c
src/core/android/SDL_android.c:1302:5: warning: variable 'br' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
default:
^~~~~~~
src/core/android/SDL_android.c:1306:12: note: uninitialized use occurs here
return br;
^~
src/core/android/SDL_android.c:1270:12: note: initialize the variable 'br' to silence this warning
jint br;
^
Maybe we could add some basics warning flags, not to see all warnings, but so that new warnings are caught sooner.
I would go for -Wall -Wextra, and some -Wno-warning for the allowed warnings.
Ryan C. Gordon
Sam Lantinga
Ozkan Sezer
Alex Szpakowski
Sebastian Krzyszkowiak
Sylvain Beucler
Cameron Gutman