[darwin, ios, macos] Introduces an MGLRendererConfiguration class

Instructions for enabling client-side rendering of CJK glyphs live in
this header, and this class provides the rest of the values needed for
instantiating the renderer on iOS and macOS.

1 files changed, 43 insertions, 0 deletions

diff --git a/platform/darwin/src/MGLRendererConfiguration.mm b/platform/darwin/src/MGLRendererConfiguration.mm
new file mode 100644
index 0000000000..ae7d7dd9fe
--- /dev/null
+++ b/platform/darwin/src/MGLRendererConfiguration.mm
@@ -0,0 +1,43 @@
+#import "MGLRendererConfiguration.h"
+#import "MGLOfflineStorage_Private.h"
+
+#if TARGET_OS_IPHONE
+#import <UIKit/UIKit.h>
+#else
+#import <AppKit/AppKit.h>
+#endif
+
+
+@implementation MGLRendererConfiguration
+
++ (instancetype)currentConfiguration {
+    return [[self alloc] init];
+}
+
+- (mbgl::DefaultFileSource *)fileSource {
+    return [MGLOfflineStorage sharedOfflineStorage].mbglFileSource;
+}
+
+- (mbgl::GLContextMode)contextMode {
+    return mbgl::GLContextMode::Unique;
+}
+
+- (const float)scaleFactor {
+#if TARGET_OS_IPHONE
+    return [UIScreen instancesRespondToSelector:@selector(nativeScale)] ? [[UIScreen mainScreen] nativeScale] : [[UIScreen mainScreen] scale];
+#else
+    return [NSScreen mainScreen].backingScaleFactor;
+#endif
+}
+
+- (mbgl::optional<std::string>)cacheDir {
+    return mbgl::optional<std::string>();
+}
+
+- (mbgl::optional<std::string>)localFontFamilyName {
+    NSString *fontFamilyName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"MGLIdeographicFontFamilyName"];
+
+    return fontFamilyName ? std::string([fontFamilyName UTF8String]) : mbgl::optional<std::string>();
+}
+
+@end