This was added in 2016, presumably to help address the move/resize issues on Windows, which have been since been addressed by the live-resize functionality.
Fixes https://github.com/libsdl-org/SDL/issues/14079
Test code:
---
int main( int argc, char *argv[] )
{
SDL_Surface *orig = SDL_LoadPNG("testyuv.png");
SDL_Surface *surf16 = SDL_ConvertSurface(orig, SDL_PIXELFORMAT_RGB565);
SDL_Surface *surf32 = SDL_ConvertSurface(surf16, SDL_PIXELFORMAT_ARGB8888);
Uint64 then = SDL_GetTicks();
for (int i = 0; i < 100000; ++i) {
SDL_BlitSurface(surf16, NULL, surf32, NULL);
}
Uint64 now = SDL_GetTicks();
SDL_Log("Blit took %d ms\n", (int)(now - then));
return 0;
}
---
Results on my system:
BlitNtoN: Blit took 34522 ms
Blit_RGB565_32 (3 LUT): Blit took 9316 ms
Blit_RGB565_32 (1 LUT): Blit took 5268 ms
Blit_RGB565_32_SSE41: Blit took 1619 ms
This beats the previous 3-LUT version and even beats SSE on my system.
Test code:
---
int main( int argc, char *argv[] )
{
SDL_Surface *orig = SDL_LoadPNG("testyuv.png");
SDL_Surface *surf16 = SDL_ConvertSurface(orig, SDL_PIXELFORMAT_RGB565);
SDL_Surface *surf32 = SDL_ConvertSurface(surf16, SDL_PIXELFORMAT_ARGB8888);
Uint64 then = SDL_GetTicks();
for (int i = 0; i < 100000; ++i) {
SDL_BlitSurface(surf16, NULL, surf32, NULL);
}
Uint64 now = SDL_GetTicks();
SDL_Log("Blit took %d ms\n", (int)(now - then));
return 0;
}
---
Results on my system:
BlitNtoN: Blit took 34522 ms
Blit_RGB565_32 (3 LUT): Blit took 9316 ms
Blit_RGB565_32 (1 LUT): Blit took 5268 ms
Blit_RGB565_32_SSE41: Blit took 6399 ms
While in a modal loop, the size in WM_WINDOWPOSCHANGING/WM_WINDOWPOSCHANGED may only be updated if the window is being resized interactively. Set the SWP_NOSIZE flag if the size hasn't changed from the last move/size event, or a size set programmatically may end up being overwritten by old size data.
When iterating over the keymap entries, a valid xkb state object has already been allocated, so use that instead of allocating/destroying a new state object for every lookup, which avoids a calloc/free operation inside libxkbcommon. Any state set by the level lookup function will be overwritten with valid state after keymap iteration has completed.
The spec doesn't guarantee that a modifier event won't arrive before a keymap event, or that it will always be sent after a keymap change if the modifiers and layout index haven't changed, so restore any valid state after allocation when building a new keymap.
This function is only available since version 1.0.0, but the SDL minimum is 0.5.0, and Steam Runtime 2 'soldier' uses 0.8.2, so add a fallback function with similar functionality for older versions.
xkb_keymap_key_get_mods_for_level() is more efficient, so it is still favored when available.
The old names made it difficult for people searching or otherwise trying to understand the codebase, as they were somewhat mangled from their expected names (e.g. configure_toplevel_xdg vs xdg_toplevel_configure, the latter of which would be expected by someone reading the spec).
If a client takes a long time to present the first frame after creating the window, a configure event to set the suspended state may arrive with libdecor increasing the content size by the decoration dimensions, which should be ignored.
Slave pointer devices report raw button values, while the master pointer device reports button values with remapping applied. Manually apply the remapping table to slave device buttons to eliminate multiple button events from one press, and allow button remapping to function when relative mode is active.
