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x11: Deal with difference in GLX_EXT_swap_control_tear behavior.

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Mesa and Nvidia handle it differently, and one or the other may fix their
implementation in the future, so test which way it works at runtime.

Reference Issue #8004.
This commit is contained in:
Ryan C. Gordon
2023-11-23 13:47:13 -05:00
parent 08fac5b1b2
commit 74a2542564
3 changed files with 86 additions and 13 deletions
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21
test/testgl.c
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@@ -199,6 +199,17 @@ static void Render(void)
ctx.glRotatef(5.0, 1.0, 1.0, 1.0);
}
static void LogSwapInterval(void)
{
int interval = 0;
const int ret_interval = SDL_GL_GetSwapInterval(&interval);
if (ret_interval < 0) {
SDL_Log("Swap Interval : %d error: %s\n", interval, SDL_GetError());
} else {
SDL_Log("Swap Interval : %d\n", interval);
}
}
int main(int argc, char *argv[])
{
int fsaa, accel;
@@ -211,8 +222,6 @@ int main(int argc, char *argv[])
int status;
int dw, dh;
int swap_interval = 0;
int interval = 0;
int ret_interval = 0;
/* Initialize parameters */
fsaa = 0;
@@ -304,12 +313,7 @@ int main(int argc, char *argv[])
SDL_Log("Screen BPP : %" SDL_PRIu32 "\n", SDL_BITSPERPIXEL(mode->format));
}
ret_interval = SDL_GL_GetSwapInterval(&interval);
if (ret_interval < 0) {
SDL_Log("Swap Interval : %d error: %s\n", interval, SDL_GetError());
} else {
SDL_Log("Swap Interval : %d\n", interval);
}
LogSwapInterval();
SDL_GetWindowSize(state->windows[0], &dw, &dh);
SDL_Log("Window Size : %d,%d\n", dw, dh);
@@ -421,6 +425,7 @@ int main(int argc, char *argv[])
SDL_GL_MakeCurrent(state->windows[i], context);
if (update_swap_interval) {
SDL_GL_SetSwapInterval(swap_interval);
LogSwapInterval();
}
SDL_GetWindowSizeInPixels(state->windows[i], &w, &h);
ctx.glViewport(0, 0, w, h);