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macOS: Expose high dpi-capable display modes on macOS 10.13+.

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Fixes an issue in macOS 10.15 where the displayed content would move up after entering, exiting and re-entering exclusive fullscreen when certain display modes were used (bug #4822).
Bug #3949 is also related to this change.
This commit is contained in:
Alex Szpakowski 2019-10-24 20:15:54 -03:00
parent 8081f11773
commit 59beaccd50
1 changed files with 89 additions and 9 deletions
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98
src/video/cocoa/SDL_cocoamodes.m
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@ -38,6 +38,10 @@
/* This gets us MAC_OS_X_VERSION_MIN_REQUIRED... */
#include <AvailabilityMacros.h>
#ifndef MAC_OS_X_VERSION_10_13
#define NSAppKitVersionNumber10_12 1504
#endif
static void
Cocoa_ToggleMenuBar(const BOOL show)
@ -100,15 +104,64 @@ CG_SetError(const char *prefix, CGDisplayErr result)
}
static SDL_bool
GetDisplayMode(_THIS, CGDisplayModeRef vidmode, CVDisplayLinkRef link, SDL_DisplayMode *mode)
GetDisplayMode(_THIS, CGDisplayModeRef vidmode, CFArrayRef modelist, CVDisplayLinkRef link, SDL_DisplayMode *mode)
{
SDL_DisplayModeData *data;
int width = 0;
int height = 0;
bool usableForDesktop = CGDisplayModeIsUsableForDesktopGUI(vidmode);
int width = (int) CGDisplayModeGetWidth(vidmode);
int height = (int) CGDisplayModeGetHeight(vidmode);
int bpp = 0;
int refreshRate = 0;
CFStringRef fmt;
/* If a list of possible diplay modes is passed in, use it to filter out
* modes that have duplicate sizes. We don't just rely on SDL's higher level
* duplicate filtering because this code can choose what properties are
* prefered.
* CGDisplayModeGetPixelWidth and friends are only available in 10.8+. */
#ifdef MAC_OS_X_VERSION_10_8
if (modelist != NULL && floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_7) {
int pixelW = (int) CGDisplayModeGetPixelWidth(vidmode);
int pixelH = (int) CGDisplayModeGetPixelHeight(vidmode);
if (width == pixelW && height == pixelH) {
CFIndex modescount = CFArrayGetCount(modelist);
for (int i = 0; i < modescount; i++) {
CGDisplayModeRef othermode = (CGDisplayModeRef) CFArrayGetValueAtIndex(modelist, i);
if (CFEqual(vidmode, othermode)) {
continue;
}
int otherW = (int) CGDisplayModeGetWidth(othermode);
int otherH = (int) CGDisplayModeGetHeight(othermode);
int otherpixelW = (int) CGDisplayModeGetPixelWidth(othermode);
int otherpixelH = (int) CGDisplayModeGetPixelHeight(othermode);
/* Ignore this mode if it's low-dpi (@1x) and we have a high-dpi
* mode in the list with the same size in points.
*/
if (width == otherW && height == otherH
&& (otherpixelW != otherW || otherpixelH != otherH)) {
return SDL_FALSE;
}
/* Ignore this mode if it's not usable for desktop UI and its
* pixel and point dimensions are equal to another GUI-capable
* mode in the list.
*/
if (width == otherW && height == otherH && pixelW == otherpixelW
&& pixelH == otherpixelH && usableForDesktop
&& CGDisplayModeIsUsableForDesktopGUI(othermode)) {
return SDL_FALSE;
}
}
}
}
#endif
data = (SDL_DisplayModeData *) SDL_malloc(sizeof(*data));
if (!data) {
return SDL_FALSE;
@ -116,8 +169,6 @@ GetDisplayMode(_THIS, CGDisplayModeRef vidmode, CVDisplayLinkRef link, SDL_Displ
data->moderef = vidmode;
fmt = CGDisplayModeCopyPixelEncoding(vidmode);
width = (int) CGDisplayModeGetWidth(vidmode);
height = (int) CGDisplayModeGetHeight(vidmode);
refreshRate = (int) (CGDisplayModeGetRefreshRate(vidmode) + 0.5);
if (CFStringCompare(fmt, CFSTR(IO32BitDirectPixels),
@ -244,7 +295,7 @@ Cocoa_InitModes(_THIS)
SDL_zero(display);
/* this returns a stddup'ed string */
display.name = (char *)Cocoa_GetDisplayName(displays[i]);
if (!GetDisplayMode(_this, moderef, link, &mode)) {
if (!GetDisplayMode(_this, moderef, NULL, link, &mode)) {
CVDisplayLinkRelease(link);
CGDisplayModeRelease(moderef);
SDL_free(display.name);
@ -341,6 +392,7 @@ Cocoa_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
CGDisplayModeRef desktopmoderef;
SDL_DisplayMode desktopmode;
CFArrayRef modes;
CFDictionaryRef dict = NULL;
CVDisplayLinkCreateWithCGDisplay(data->display, &link);
@ -352,7 +404,7 @@ Cocoa_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
* sure there are no duplicates so it's safe to always add the desktop mode
* even in cases where it is in the CopyAllDisplayModes list.
*/
if (desktopmoderef && GetDisplayMode(_this, desktopmoderef, link, &desktopmode)) {
if (desktopmoderef && GetDisplayMode(_this, desktopmoderef, NULL, link, &desktopmode)) {
if (!SDL_AddDisplayMode(display, &desktopmode)) {
CGDisplayModeRelease(desktopmoderef);
SDL_free(desktopmode.driverdata);
@ -361,7 +413,35 @@ Cocoa_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
CGDisplayModeRelease(desktopmoderef);
}
modes = CGDisplayCopyAllDisplayModes(data->display, NULL);
/* By default, CGDisplayCopyAllDisplayModes will only get a subset of the
* system's available modes. For example on a 15" 2016 MBP, users can
* choose 1920x1080@2x in System Preferences but it won't show up here,
* unless we specify the option below.
* The display modes returned by CGDisplayCopyAllDisplayModes are also not
* high dpi-capable unless this option is set.
* kCGDisplayShowDuplicateLowResolutionModes exists since 10.8, but macOS
* 10.11 and 10.12 have bugs with the modes returned when it's used:
* https://bugzilla.libsdl.org/show_bug.cgi?id=3949
* macOS 10.15 also seems to have a bug where entering, exiting, and
* re-entering exclusive fullscreen with a low dpi display mode can cause
* the content of the screen to move up, which this setting avoids:
* https://bugzilla.libsdl.org/show_bug.cgi?id=4822
*/
#ifdef MAC_OS_X_VERSION_10_8
if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_12) {
const CFStringRef dictkeys[] = {kCGDisplayShowDuplicateLowResolutionModes};
const CFBooleanRef dictvalues[] = {kCFBooleanTrue};
dict = CFDictionaryCreate(NULL,
(const void **)dictkeys,
(const void **)dictvalues,
1,
&kCFCopyStringDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
}
#endif
modes = CGDisplayCopyAllDisplayModes(data->display, dict);
CFRelease(dict);
if (modes) {
CFIndex i;
@ -371,7 +451,7 @@ Cocoa_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
CGDisplayModeRef moderef = (CGDisplayModeRef) CFArrayGetValueAtIndex(modes, i);
SDL_DisplayMode mode;
if (GetDisplayMode(_this, moderef, link, &mode)) {
if (GetDisplayMode(_this, moderef, modes, link, &mode)) {
if (SDL_AddDisplayMode(display, &mode)) {
CGDisplayModeRetain(moderef);
} else {