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mac resolution

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Signed-off-by: 21pages <pages21@163.com>
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21pages
2023-02-12 16:09:41 +08:00
parent 18a66749a1
commit 5b8e51d6b9
2 changed files with 183 additions and 1 deletions
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111
src/platform/macos.mm
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@@ -40,3 +40,114 @@ extern "C" float BackingScaleFactor() {
if (s) return [s backingScaleFactor];
return 1;
}
// https://github.com/jhford/screenresolution/blob/master/cg_utils.c
// https://github.com/jdoupe/screenres/blob/master/setgetscreen.m
extern "C" bool MacGetModeNum(CGDirectDisplayID display, uint32_t *numModes) {
CFArrayRef allModes = CGDisplayCopyAllDisplayModes(display, NULL);
if (allModes == NULL) {
return false;
}
*numModes = CFArrayGetCount(allModes);
CFRelease(allModes);
return true;
}
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) {
return false;
}
*numModes = CFArrayGetCount(allModes);
for (int 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);
}
CFRelease(allModes);
return true;
}
extern "C" bool MacGetMode(CGDirectDisplayID display, uint32_t *width, uint32_t *height) {
CGDisplayModeRef mode = CGDisplayCopyDisplayMode(display);
if (mode == NULL) {
return false;
}
*width = (uint32_t)CGDisplayModeGetWidth(mode);
*height = (uint32_t)CGDisplayModeGetHeight(mode);
CGDisplayModeRelease(mode);
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) {
CGError rc;
CGDisplayConfigRef config;
rc = CGBeginDisplayConfiguration(&config);
if (rc != kCGErrorSuccess) {
return false;
}
rc = CGConfigureDisplayWithDisplayMode(config, display, mode, NULL);
if (rc != kCGErrorSuccess) {
return false;
}
rc = CGCompleteDisplayConfiguration(config, kCGConfigureForSession);
if (rc != kCGErrorSuccess) {
return false;
}
return true;
}
extern "C" bool MacSetMode(CGDirectDisplayID display, uint32_t width, uint32_t height)
{
bool ret = false;
CGDisplayModeRef currentMode = CGDisplayCopyDisplayMode(display);
if (currentMode == NULL) {
return ret;
}
CFArrayRef allModes = CGDisplayCopyAllDisplayModes(display, NULL);
if (allModes == NULL) {
CGDisplayModeRelease(currentMode);
return ret;
}
int numModes = CFArrayGetCount(allModes);
CGDisplayModeRef bestMode = NULL;
for (int i = 0; i < numModes; i++) {
CGDisplayModeRef mode = (CGDisplayModeRef)CFArrayGetValueAtIndex(allModes, i);
if (width == CGDisplayModeGetWidth(mode) &&
height == CGDisplayModeGetHeight(mode) &&
bitDepth(currentMode) == bitDepth(mode) &&
CGDisplayModeGetRefreshRate(currentMode) == CGDisplayModeGetRefreshRate(mode)) {
ret = setDisplayToMode(display, mode);
break;
}
}
CGDisplayModeRelease(currentMode);
CFRelease(allModes);
return ret;
}