824b9b0a58
This function wasn't consistently correct across platforms and devices. If you want the UI scale factor, you can use display_scale in the structure returned by SDL_GetDesktopDisplayMode(). If you need an approximate DPI, you can multiply this value times 160 on iPhone and Android, and 96 on other platforms.
574 lines
21 KiB
Objective-C
574 lines
21 KiB
Objective-C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#if SDL_VIDEO_DRIVER_COCOA
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#include "SDL_cocoavideo.h"
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/* We need this for IODisplayCreateInfoDictionary and kIODisplayOnlyPreferredName */
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#include <IOKit/graphics/IOGraphicsLib.h>
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/* We need this for CVDisplayLinkGetNominalOutputVideoRefreshPeriod */
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#include <CoreVideo/CVBase.h>
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#include <CoreVideo/CVDisplayLink.h>
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/* This gets us MAC_OS_X_VERSION_MIN_REQUIRED... */
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#include <AvailabilityMacros.h>
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#ifndef MAC_OS_X_VERSION_10_13
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#define NSAppKitVersionNumber10_12 1504
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#endif
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#if (IOGRAPHICSTYPES_REV < 40)
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#define kDisplayModeNativeFlag 0x02000000
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#endif
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static int CG_SetError(const char *prefix, CGDisplayErr result)
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{
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const char *error;
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switch (result) {
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case kCGErrorFailure:
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error = "kCGErrorFailure";
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break;
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case kCGErrorIllegalArgument:
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error = "kCGErrorIllegalArgument";
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break;
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case kCGErrorInvalidConnection:
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error = "kCGErrorInvalidConnection";
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break;
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case kCGErrorInvalidContext:
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error = "kCGErrorInvalidContext";
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break;
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case kCGErrorCannotComplete:
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error = "kCGErrorCannotComplete";
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break;
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case kCGErrorNotImplemented:
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error = "kCGErrorNotImplemented";
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break;
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case kCGErrorRangeCheck:
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error = "kCGErrorRangeCheck";
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break;
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case kCGErrorTypeCheck:
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error = "kCGErrorTypeCheck";
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break;
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case kCGErrorInvalidOperation:
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error = "kCGErrorInvalidOperation";
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break;
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case kCGErrorNoneAvailable:
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error = "kCGErrorNoneAvailable";
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break;
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default:
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error = "Unknown Error";
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break;
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}
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return SDL_SetError("%s: %s", prefix, error);
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}
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static float GetDisplayModeRefreshRate(CGDisplayModeRef vidmode, CVDisplayLinkRef link)
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{
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double refreshRate = CGDisplayModeGetRefreshRate(vidmode);
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/* CGDisplayModeGetRefreshRate can return 0 (eg for built-in displays). */
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if (refreshRate == 0 && link != NULL) {
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CVTime time = CVDisplayLinkGetNominalOutputVideoRefreshPeriod(link);
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if ((time.flags & kCVTimeIsIndefinite) == 0 && time.timeValue != 0) {
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refreshRate = (double)time.timeScale / time.timeValue;
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}
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}
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return (int)(refreshRate * 100) / 100.0f;
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}
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static SDL_bool HasValidDisplayModeFlags(CGDisplayModeRef vidmode)
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{
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uint32_t ioflags = CGDisplayModeGetIOFlags(vidmode);
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/* Filter out modes which have flags that we don't want. */
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if (ioflags & (kDisplayModeNeverShowFlag | kDisplayModeNotGraphicsQualityFlag)) {
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return SDL_FALSE;
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}
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/* Filter out modes which don't have flags that we want. */
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if (!(ioflags & kDisplayModeValidFlag) || !(ioflags & kDisplayModeSafeFlag)) {
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return SDL_FALSE;
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}
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return SDL_TRUE;
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}
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static Uint32 GetDisplayModePixelFormat(CGDisplayModeRef vidmode)
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{
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/* This API is deprecated in 10.11 with no good replacement (as of 10.15). */
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CFStringRef fmt = CGDisplayModeCopyPixelEncoding(vidmode);
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Uint32 pixelformat = SDL_PIXELFORMAT_UNKNOWN;
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if (CFStringCompare(fmt, CFSTR(IO32BitDirectPixels),
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kCFCompareCaseInsensitive) == kCFCompareEqualTo) {
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pixelformat = SDL_PIXELFORMAT_ARGB8888;
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} else if (CFStringCompare(fmt, CFSTR(IO16BitDirectPixels),
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kCFCompareCaseInsensitive) == kCFCompareEqualTo) {
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pixelformat = SDL_PIXELFORMAT_ARGB1555;
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} else if (CFStringCompare(fmt, CFSTR(kIO30BitDirectPixels),
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kCFCompareCaseInsensitive) == kCFCompareEqualTo) {
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pixelformat = SDL_PIXELFORMAT_ARGB2101010;
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} else {
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/* ignore 8-bit and such for now. */
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}
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CFRelease(fmt);
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return pixelformat;
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}
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static SDL_bool GetDisplayMode(_THIS, CGDisplayModeRef vidmode, SDL_bool vidmodeCurrent, CFArrayRef modelist, CVDisplayLinkRef link, SDL_DisplayMode *mode)
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{
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SDL_DisplayModeData *data;
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bool usableForGUI = CGDisplayModeIsUsableForDesktopGUI(vidmode);
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size_t width = CGDisplayModeGetWidth(vidmode);
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size_t height = CGDisplayModeGetHeight(vidmode);
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size_t pixelW = width;
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size_t pixelH = height;
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uint32_t ioflags = CGDisplayModeGetIOFlags(vidmode);
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float refreshrate = GetDisplayModeRefreshRate(vidmode, link);
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Uint32 format = GetDisplayModePixelFormat(vidmode);
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bool interlaced = (ioflags & kDisplayModeInterlacedFlag) != 0;
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CFMutableArrayRef modes;
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if (format == SDL_PIXELFORMAT_UNKNOWN) {
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return SDL_FALSE;
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}
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/* Don't fail the current mode based on flags because this could prevent Cocoa_InitModes from
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* succeeding if the current mode lacks certain flags (esp kDisplayModeSafeFlag). */
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if (!vidmodeCurrent && !HasValidDisplayModeFlags(vidmode)) {
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return SDL_FALSE;
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}
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modes = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
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CFArrayAppendValue(modes, vidmode);
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/* If a list of possible display modes is passed in, use it to filter out
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* modes that have duplicate sizes. We don't just rely on SDL's higher level
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* duplicate filtering because this code can choose what properties are
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* prefered, and it can add CGDisplayModes to the DisplayModeData's list of
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* modes to try (see comment below for why that's necessary). */
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pixelW = CGDisplayModeGetPixelWidth(vidmode);
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pixelH = CGDisplayModeGetPixelHeight(vidmode);
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if (modelist != NULL) {
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CFIndex modescount = CFArrayGetCount(modelist);
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int i;
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for (i = 0; i < modescount; i++) {
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size_t otherW, otherH, otherpixelW, otherpixelH;
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float otherrefresh;
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Uint32 otherformat;
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bool otherGUI;
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CGDisplayModeRef othermode = (CGDisplayModeRef)CFArrayGetValueAtIndex(modelist, i);
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uint32_t otherioflags = CGDisplayModeGetIOFlags(othermode);
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if (CFEqual(vidmode, othermode)) {
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continue;
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}
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if (!HasValidDisplayModeFlags(othermode)) {
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continue;
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}
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otherW = CGDisplayModeGetWidth(othermode);
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otherH = CGDisplayModeGetHeight(othermode);
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otherpixelW = CGDisplayModeGetPixelWidth(othermode);
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otherpixelH = CGDisplayModeGetPixelHeight(othermode);
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otherrefresh = GetDisplayModeRefreshRate(othermode, link);
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otherformat = GetDisplayModePixelFormat(othermode);
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otherGUI = CGDisplayModeIsUsableForDesktopGUI(othermode);
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/* Ignore this mode if it's interlaced and there's a non-interlaced
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* mode in the list with the same properties.
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*/
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if (interlaced && ((otherioflags & kDisplayModeInterlacedFlag) == 0) && width == otherW && height == otherH && pixelW == otherpixelW && pixelH == otherpixelH && refreshrate == otherrefresh && format == otherformat && usableForGUI == otherGUI) {
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CFRelease(modes);
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return SDL_FALSE;
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}
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/* Ignore this mode if it's not usable for desktop UI and its
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* properties are equal to another GUI-capable mode in the list.
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*/
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if (width == otherW && height == otherH && pixelW == otherpixelW && pixelH == otherpixelH && !usableForGUI && otherGUI && refreshrate == otherrefresh && format == otherformat) {
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CFRelease(modes);
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return SDL_FALSE;
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}
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/* If multiple modes have the exact same properties, they'll all
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* go in the list of modes to try when SetDisplayMode is called.
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* This is needed because kCGDisplayShowDuplicateLowResolutionModes
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* (which is used to expose highdpi display modes) can make the
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* list of modes contain duplicates (according to their properties
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* obtained via public APIs) which don't work with SetDisplayMode.
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* Those duplicate non-functional modes *do* have different pixel
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* formats according to their internal data structure viewed with
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* NSLog, but currently no public API can detect that.
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* https://bugzilla.libsdl.org/show_bug.cgi?id=4822
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*
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* As of macOS 10.15.0, those duplicates have the exact same
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* properties via public APIs in every way (even their IO flags and
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* CGDisplayModeGetIODisplayModeID is the same), so we could test
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* those for equality here too, but I'm intentionally not doing that
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* in case there are duplicate modes with different IO flags or IO
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* display mode IDs in the future. In that case I think it's better
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* to try them all in SetDisplayMode than to risk one of them being
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* correct but it being filtered out by SDL_AddFullscreenDisplayMode
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* as being a duplicate.
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*/
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if (width == otherW && height == otherH && pixelW == otherpixelW && pixelH == otherpixelH && usableForGUI == otherGUI && refreshrate == otherrefresh && format == otherformat) {
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CFArrayAppendValue(modes, othermode);
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}
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}
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}
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SDL_zerop(mode);
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data = (SDL_DisplayModeData *)SDL_malloc(sizeof(*data));
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if (!data) {
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CFRelease(modes);
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return SDL_FALSE;
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}
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data->modes = modes;
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mode->format = format;
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mode->pixel_w = (int)pixelW;
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mode->pixel_h = (int)pixelH;
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mode->screen_w = (int)width;
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mode->screen_h = (int)height;
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mode->refresh_rate = refreshrate;
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mode->driverdata = data;
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return SDL_TRUE;
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}
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static const char *Cocoa_GetDisplayName(CGDirectDisplayID displayID)
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{
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/* This API is deprecated in 10.9 with no good replacement (as of 10.15). */
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io_service_t servicePort = CGDisplayIOServicePort(displayID);
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CFDictionaryRef deviceInfo = IODisplayCreateInfoDictionary(servicePort, kIODisplayOnlyPreferredName);
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NSDictionary *localizedNames = [(__bridge NSDictionary *)deviceInfo objectForKey:[NSString stringWithUTF8String:kDisplayProductName]];
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const char *displayName = NULL;
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if ([localizedNames count] > 0) {
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displayName = SDL_strdup([[localizedNames objectForKey:[[localizedNames allKeys] objectAtIndex:0]] UTF8String]);
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}
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CFRelease(deviceInfo);
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return displayName;
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}
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void Cocoa_InitModes(_THIS)
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{
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@autoreleasepool {
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CGDisplayErr result;
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CGDirectDisplayID *displays;
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CGDisplayCount numDisplays;
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SDL_bool isstack;
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int pass, i;
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result = CGGetOnlineDisplayList(0, NULL, &numDisplays);
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if (result != kCGErrorSuccess) {
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CG_SetError("CGGetOnlineDisplayList()", result);
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return;
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}
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displays = SDL_small_alloc(CGDirectDisplayID, numDisplays, &isstack);
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result = CGGetOnlineDisplayList(numDisplays, displays, &numDisplays);
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if (result != kCGErrorSuccess) {
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CG_SetError("CGGetOnlineDisplayList()", result);
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SDL_small_free(displays, isstack);
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return;
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}
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/* Pick up the primary display in the first pass, then get the rest */
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for (pass = 0; pass < 2; ++pass) {
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for (i = 0; i < numDisplays; ++i) {
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SDL_VideoDisplay display;
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SDL_DisplayData *displaydata;
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SDL_DisplayMode mode;
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CGDisplayModeRef moderef = NULL;
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CVDisplayLinkRef link = NULL;
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if (pass == 0) {
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if (!CGDisplayIsMain(displays[i])) {
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continue;
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}
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} else {
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if (CGDisplayIsMain(displays[i])) {
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continue;
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}
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}
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if (CGDisplayMirrorsDisplay(displays[i]) != kCGNullDirectDisplay) {
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continue;
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}
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moderef = CGDisplayCopyDisplayMode(displays[i]);
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if (!moderef) {
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continue;
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}
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displaydata = (SDL_DisplayData *)SDL_malloc(sizeof(*displaydata));
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if (!displaydata) {
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CGDisplayModeRelease(moderef);
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continue;
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}
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displaydata->display = displays[i];
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CVDisplayLinkCreateWithCGDisplay(displays[i], &link);
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SDL_zero(display);
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/* this returns a stddup'ed string */
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display.name = (char *)Cocoa_GetDisplayName(displays[i]);
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if (!GetDisplayMode(_this, moderef, SDL_TRUE, NULL, link, &mode)) {
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CVDisplayLinkRelease(link);
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CGDisplayModeRelease(moderef);
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SDL_free(display.name);
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SDL_free(displaydata);
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continue;
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}
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CVDisplayLinkRelease(link);
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CGDisplayModeRelease(moderef);
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display.desktop_mode = mode;
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display.driverdata = displaydata;
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SDL_AddVideoDisplay(&display, SDL_FALSE);
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SDL_free(display.name);
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}
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}
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SDL_small_free(displays, isstack);
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}
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}
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int Cocoa_GetDisplayBounds(_THIS, SDL_VideoDisplay *display, SDL_Rect *rect)
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{
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SDL_DisplayData *displaydata = display->driverdata;
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CGRect cgrect;
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cgrect = CGDisplayBounds(displaydata->display);
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rect->x = (int)cgrect.origin.x;
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rect->y = (int)cgrect.origin.y;
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rect->w = (int)cgrect.size.width;
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rect->h = (int)cgrect.size.height;
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return 0;
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}
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int Cocoa_GetDisplayUsableBounds(_THIS, SDL_VideoDisplay *display, SDL_Rect *rect)
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{
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SDL_DisplayData *displaydata = display->driverdata;
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const CGDirectDisplayID cgdisplay = displaydata->display;
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NSArray *screens = [NSScreen screens];
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NSScreen *screen = nil;
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/* !!! FIXME: maybe track the NSScreen in SDL_DisplayData? */
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for (NSScreen *i in screens) {
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const CGDirectDisplayID thisDisplay = (CGDirectDisplayID)[[[i deviceDescription] objectForKey:@"NSScreenNumber"] unsignedIntValue];
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if (thisDisplay == cgdisplay) {
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screen = i;
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break;
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}
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}
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SDL_assert(screen != nil); /* didn't find it?! */
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if (screen == nil) {
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return -1;
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}
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{
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const NSRect frame = [screen visibleFrame];
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rect->x = (int)frame.origin.x;
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rect->y = (int)(CGDisplayPixelsHigh(kCGDirectMainDisplay) - frame.origin.y - frame.size.height);
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rect->w = (int)frame.size.width;
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rect->h = (int)frame.size.height;
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}
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return 0;
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}
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int Cocoa_GetDisplayModes(_THIS, SDL_VideoDisplay *display)
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{
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SDL_DisplayData *data = display->driverdata;
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CVDisplayLinkRef link = NULL;
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CFArrayRef modes;
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CFDictionaryRef dict = NULL;
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const CFStringRef dictkeys[] = { kCGDisplayShowDuplicateLowResolutionModes };
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const CFBooleanRef dictvalues[] = { kCFBooleanTrue };
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CVDisplayLinkCreateWithCGDisplay(data->display, &link);
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/* By default, CGDisplayCopyAllDisplayModes will only get a subset of the
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* system's available modes. For example on a 15" 2016 MBP, users can
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* choose 1920x1080@2x in System Preferences but it won't show up here,
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* unless we specify the option below.
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* The display modes returned by CGDisplayCopyAllDisplayModes are also not
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* high dpi-capable unless this option is set.
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* macOS 10.15 also seems to have a bug where entering, exiting, and
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* re-entering exclusive fullscreen with a low dpi display mode can cause
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* the content of the screen to move up, which this setting avoids:
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* https://bugzilla.libsdl.org/show_bug.cgi?id=4822
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*/
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dict = CFDictionaryCreate(NULL,
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(const void **)dictkeys,
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(const void **)dictvalues,
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1,
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&kCFCopyStringDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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modes = CGDisplayCopyAllDisplayModes(data->display, dict);
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if (dict) {
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CFRelease(dict);
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}
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if (modes) {
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CFIndex i;
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const CFIndex count = CFArrayGetCount(modes);
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for (i = 0; i < count; i++) {
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CGDisplayModeRef moderef = (CGDisplayModeRef)CFArrayGetValueAtIndex(modes, i);
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SDL_DisplayMode mode;
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if (GetDisplayMode(_this, moderef, SDL_FALSE, modes, link, &mode)) {
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if (!SDL_AddFullscreenDisplayMode(display, &mode)) {
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CFRelease(((SDL_DisplayModeData *)mode.driverdata)->modes);
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SDL_free(mode.driverdata);
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}
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}
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}
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CFRelease(modes);
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}
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CVDisplayLinkRelease(link);
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return 0;
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}
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static CGError SetDisplayModeForDisplay(CGDirectDisplayID display, SDL_DisplayModeData *data)
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{
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/* SDL_DisplayModeData can contain multiple CGDisplayModes to try (with
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* identical properties), some of which might not work. See GetDisplayMode.
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*/
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CGError result = kCGErrorFailure;
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for (CFIndex i = 0; i < CFArrayGetCount(data->modes); i++) {
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CGDisplayModeRef moderef = (CGDisplayModeRef)CFArrayGetValueAtIndex(data->modes, i);
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result = CGDisplaySetDisplayMode(display, moderef, NULL);
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if (result == kCGErrorSuccess) {
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/* If this mode works, try it first next time. */
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CFArrayExchangeValuesAtIndices(data->modes, i, 0);
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break;
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}
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}
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return result;
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}
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int Cocoa_SetDisplayMode(_THIS, SDL_VideoDisplay *display, SDL_DisplayMode *mode)
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{
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SDL_DisplayData *displaydata = display->driverdata;
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SDL_DisplayModeData *data = (SDL_DisplayModeData *)mode->driverdata;
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CGDisplayFadeReservationToken fade_token = kCGDisplayFadeReservationInvalidToken;
|
|
CGError result;
|
|
|
|
/* Fade to black to hide resolution-switching flicker */
|
|
if (CGAcquireDisplayFadeReservation(5, &fade_token) == kCGErrorSuccess) {
|
|
CGDisplayFade(fade_token, 0.3, kCGDisplayBlendNormal, kCGDisplayBlendSolidColor, 0.0, 0.0, 0.0, TRUE);
|
|
}
|
|
|
|
if (data == display->desktop_mode.driverdata) {
|
|
/* Restoring desktop mode */
|
|
SetDisplayModeForDisplay(displaydata->display, data);
|
|
|
|
if (CGDisplayIsMain(displaydata->display)) {
|
|
CGReleaseAllDisplays();
|
|
} else {
|
|
CGDisplayRelease(displaydata->display);
|
|
}
|
|
} else {
|
|
/* Put up the blanking window (a window above all other windows) */
|
|
if (CGDisplayIsMain(displaydata->display)) {
|
|
/* If we don't capture all displays, Cocoa tries to rearrange windows... *sigh* */
|
|
result = CGCaptureAllDisplays();
|
|
} else {
|
|
result = CGDisplayCapture(displaydata->display);
|
|
}
|
|
if (result != kCGErrorSuccess) {
|
|
CG_SetError("CGDisplayCapture()", result);
|
|
goto ERR_NO_CAPTURE;
|
|
}
|
|
|
|
/* Do the physical switch */
|
|
result = SetDisplayModeForDisplay(displaydata->display, data);
|
|
if (result != kCGErrorSuccess) {
|
|
CG_SetError("CGDisplaySwitchToMode()", result);
|
|
goto ERR_NO_SWITCH;
|
|
}
|
|
}
|
|
|
|
/* Fade in again (asynchronously) */
|
|
if (fade_token != kCGDisplayFadeReservationInvalidToken) {
|
|
CGDisplayFade(fade_token, 0.5, kCGDisplayBlendSolidColor, kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);
|
|
CGReleaseDisplayFadeReservation(fade_token);
|
|
}
|
|
|
|
return 0;
|
|
|
|
/* Since the blanking window covers *all* windows (even force quit) correct recovery is crucial */
|
|
ERR_NO_SWITCH:
|
|
if (CGDisplayIsMain(displaydata->display)) {
|
|
CGReleaseAllDisplays();
|
|
} else {
|
|
CGDisplayRelease(displaydata->display);
|
|
}
|
|
ERR_NO_CAPTURE:
|
|
if (fade_token != kCGDisplayFadeReservationInvalidToken) {
|
|
CGDisplayFade(fade_token, 0.5, kCGDisplayBlendSolidColor, kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);
|
|
CGReleaseDisplayFadeReservation(fade_token);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
void Cocoa_QuitModes(_THIS)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < _this->num_displays; ++i) {
|
|
SDL_VideoDisplay *display = &_this->displays[i];
|
|
SDL_DisplayModeData *mode;
|
|
|
|
if (display->current_mode->driverdata != display->desktop_mode.driverdata) {
|
|
Cocoa_SetDisplayMode(_this, display, &display->desktop_mode);
|
|
}
|
|
|
|
mode = (SDL_DisplayModeData *)display->desktop_mode.driverdata;
|
|
CFRelease(mode->modes);
|
|
|
|
for (j = 0; j < display->num_fullscreen_modes; j++) {
|
|
mode = (SDL_DisplayModeData *)display->fullscreen_modes[j].driverdata;
|
|
CFRelease(mode->modes);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif /* SDL_VIDEO_DRIVER_COCOA */
|