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GUI: detect UI scale factor when moving window

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This commit is contained in:
tildearrow 2023-08-31 01:24:06 -05:00
parent 9caa2f38f4
commit a882d7bcf2
6 changed files with 107 additions and 25 deletions
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41
src/gui/scaling.cpp
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@ -42,14 +42,23 @@ typedef int (*XDS)(void*);
typedef int (*XDW)(void*,int);
#endif
double getScaleFactor(const char* driverHint) {
double getScaleFactor(const char* driverHint, void* windowHint) {
double ret=1.0;
// Windows
#ifdef _WIN32
POINT nullPoint;
nullPoint.x=-1;
nullPoint.y=-1;
if (windowHint!=NULL) {
int px=0;
int py=0;
SDL_GetWindowPosition((SDL_Window*)windowHint,&px,&py);
nullPoint.x=px;
nullPoint.y=py;
} else {
nullPoint.x=-1;
nullPoint.y=-1;
}
HMONITOR disp=MonitorFromPoint(nullPoint,MONITOR_DEFAULTTOPRIMARY);
if (disp==NULL) {
@ -93,12 +102,30 @@ double getScaleFactor(const char* driverHint) {
return ret;
#endif
// macOS - backingScaleFactor
// macOS
#ifdef __APPLE__
if (driverHint==NULL) {
return getMacDPIScale();
} else if (strcmp(driverHint,"cocoa")==0 || strcmp(driverHint,"uikit")==0) {
return getMacDPIScale();
return getMacDPIScale(NULL,false);
} else if (strcmp(driverHint,"cocoa")==0) {
void* nsWindow=NULL;
SDL_SysWMinfo wmInfo;
if (windowHint!=NULL) {
SDL_VERSION(&info.version)
if (SDL_GetWindowWMInfo((SDL_Window*)windowHint,&wmInfo)==SDL_TRUE) {
nsWindow=wmInfo.cocoa.window;
}
}
return getMacDPIScale(nsWindow,false);
} else if (strcmp(driverHint,"uikit")==0) {
void* uiWindow=NULL;
SDL_SysWMinfo wmInfo;
if (windowHint!=NULL) {
SDL_VERSION(&info.version)
if (SDL_GetWindowWMInfo((SDL_Window*)windowHint,&wmInfo)==SDL_TRUE) {
uiWindow=wmInfo.cocoa.window;
}
}
return getMacDPIScale(uiWindow,true);
}
#endif