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ensure same bpp and framerate when get and set for mac

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21pages 2023-02-25 21:26:09 +08:00
parent b9b4913ca0
commit e3d704dfde
1 changed files with 49 additions and 34 deletions
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83
src/platform/macos.mm
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@ -74,6 +74,33 @@ extern "C" float BackingScaleFactor() {
// https://github.com/jhford/screenresolution/blob/master/cg_utils.c
// https://github.com/jdoupe/screenres/blob/master/setgetscreen.m
size_t bitDepth(CGDisplayModeRef mode) {
size_t depth = 0;
// Deprecated, same display same bpp?
// https://stackoverflow.com/questions/8210824/how-to-avoid-cgdisplaymodecopypixelencoding-to-get-bpp
// https://github.com/libsdl-org/SDL/pull/6628
CFStringRef pixelEncoding = CGDisplayModeCopyPixelEncoding(mode);
// my numerical representation for kIO16BitFloatPixels and kIO32bitFloatPixels
// are made up and possibly non-sensical
if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(kIO32BitFloatPixels), kCFCompareCaseInsensitive)) {
depth = 96;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(kIO64BitDirectPixels), kCFCompareCaseInsensitive)) {
depth = 64;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(kIO16BitFloatPixels), kCFCompareCaseInsensitive)) {
depth = 48;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(IO32BitDirectPixels), kCFCompareCaseInsensitive)) {
depth = 32;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(kIO30BitDirectPixels), kCFCompareCaseInsensitive)) {
depth = 30;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(IO16BitDirectPixels), kCFCompareCaseInsensitive)) {
depth = 16;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(IO8BitIndexedPixels), kCFCompareCaseInsensitive)) {
depth = 8;
}
CFRelease(pixelEncoding);
return depth;
}
extern "C" bool MacGetModeNum(CGDirectDisplayID display, uint32_t *numModes) {
CFArrayRef allModes = CGDisplayCopyAllDisplayModes(display, NULL);
if (allModes == NULL) {
@ -85,16 +112,28 @@ extern "C" bool MacGetModeNum(CGDirectDisplayID display, uint32_t *numModes) {
}
extern "C" bool MacGetModes(CGDirectDisplayID display, uint32_t *widths, uint32_t *heights, uint32_t max, uint32_t *numModes) {
CFArrayRef allModes = CGDisplayCopyAllDisplayModes(display, NULL);
if (allModes == NULL) {
CGDisplayModeRef currentMode = CGDisplayCopyDisplayMode(display);
if (currentMode == NULL) {
return false;
}
*numModes = CFArrayGetCount(allModes);
for (uint32_t i = 0; i < *numModes && i < max; i++) {
CGDisplayModeRef mode = (CGDisplayModeRef)CFArrayGetValueAtIndex(allModes, i);
widths[i] = (uint32_t)CGDisplayModeGetWidth(mode);
heights[i] = (uint32_t)CGDisplayModeGetHeight(mode);
CFArrayRef allModes = CGDisplayCopyAllDisplayModes(display, NULL);
if (allModes == NULL) {
CGDisplayModeRelease(currentMode);
return false;
}
uint32_t allModeCount = CFArrayGetCount(allModes);
uint32_t realNum = 0;
for (uint32_t i = 0; i < allModeCount && realNum < max; i++) {
CGDisplayModeRef mode = (CGDisplayModeRef)CFArrayGetValueAtIndex(allModes, i);
if (CGDisplayModeGetRefreshRate(currentMode) == CGDisplayModeGetRefreshRate(mode) &&
bitDepth(currentMode) == bitDepth(mode)) {
widths[realNum] = (uint32_t)CGDisplayModeGetWidth(mode);
heights[realNum] = (uint32_t)CGDisplayModeGetHeight(mode);
realNum++;
}
}
*numModes = realNum;
CGDisplayModeRelease(currentMode);
CFRelease(allModes);
return true;
}
@ -110,31 +149,8 @@ extern "C" bool MacGetMode(CGDirectDisplayID display, uint32_t *width, uint32_t
return true;
}
size_t bitDepth(CGDisplayModeRef mode) {
size_t depth = 0;
CFStringRef pixelEncoding = CGDisplayModeCopyPixelEncoding(mode);
// my numerical representation for kIO16BitFloatPixels and kIO32bitFloatPixels
// are made up and possibly non-sensical
if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(kIO32BitFloatPixels), kCFCompareCaseInsensitive)) {
depth = 96;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(kIO64BitDirectPixels), kCFCompareCaseInsensitive)) {
depth = 64;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(kIO16BitFloatPixels), kCFCompareCaseInsensitive)) {
depth = 48;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(IO32BitDirectPixels), kCFCompareCaseInsensitive)) {
depth = 32;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(kIO30BitDirectPixels), kCFCompareCaseInsensitive)) {
depth = 30;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(IO16BitDirectPixels), kCFCompareCaseInsensitive)) {
depth = 16;
} else if (kCFCompareEqualTo == CFStringCompare(pixelEncoding, CFSTR(IO8BitIndexedPixels), kCFCompareCaseInsensitive)) {
depth = 8;
}
CFRelease(pixelEncoding);
return depth;
}
bool setDisplayToMode(CGDirectDisplayID display, CGDisplayModeRef mode) {
static bool setDisplayToMode(CGDirectDisplayID display, CGDisplayModeRef mode) {
CGError rc;
CGDisplayConfigRef config;
rc = CGBeginDisplayConfiguration(&config);
@ -152,7 +168,6 @@ bool setDisplayToMode(CGDirectDisplayID display, CGDisplayModeRef mode) {
return true;
}
extern "C" bool MacSetMode(CGDirectDisplayID display, uint32_t width, uint32_t height)
{
bool ret = false;
@ -170,8 +185,8 @@ extern "C" bool MacSetMode(CGDirectDisplayID display, uint32_t width, uint32_t h
CGDisplayModeRef mode = (CGDisplayModeRef)CFArrayGetValueAtIndex(allModes, i);
if (width == CGDisplayModeGetWidth(mode) &&
height == CGDisplayModeGetHeight(mode) &&
bitDepth(currentMode) == bitDepth(mode) &&
CGDisplayModeGetRefreshRate(currentMode) == CGDisplayModeGetRefreshRate(mode)) {
CGDisplayModeGetRefreshRate(currentMode) == CGDisplayModeGetRefreshRate(mode) &&
bitDepth(currentMode) == bitDepth(mode)) {
ret = setDisplayToMode(display, mode);
break;
}