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#import "MGLMapSnapshotter.h"
#import <mbgl/actor/actor.hpp>
#import <mbgl/actor/scheduler.hpp>
#import <mbgl/util/geo.hpp>
#import <mbgl/map/map_snapshotter.hpp>
#import <mbgl/map/camera.hpp>
#import <mbgl/storage/default_file_source.hpp>
#import <mbgl/util/default_thread_pool.hpp>
#import <mbgl/util/string.hpp>
#import <mbgl/util/shared_thread_pool.hpp>
#import "MGLOfflineStorage_Private.h"
#import "MGLGeometry_Private.h"
#import "NSBundle+MGLAdditions.h"
#import "MGLStyle.h"
#if TARGET_OS_IPHONE
#import "UIImage+MGLAdditions.h"
#else
#import "NSImage+MGLAdditions.h"
#endif
const CGPoint MGLLogoImagePosition = CGPointMake(8, 8);
const CGFloat MGLSnapshotterMinimumPixelSize = 64;
@implementation MGLMapSnapshotOptions
- (instancetype _Nonnull)initWithStyleURL:(nullable NSURL*)styleURL camera:(MGLMapCamera*)camera size:(CGSize) size;
{
self = [super init];
if (self) {
if ( !styleURL)
{
styleURL = [MGLStyle streetsStyleURLWithVersion:MGLStyleDefaultVersion];
}
_styleURL = styleURL;
_size = size;
_camera = camera;
#if TARGET_OS_IPHONE
_scale = [UIScreen mainScreen].scale;
#else
_scale = [NSScreen mainScreen].backingScaleFactor;
#endif
}
return self;
}
@end
@interface MGLMapSnapshotter()
@property (nonatomic) MGLMapSnapshotOptions *options;
@end
@implementation MGLMapSnapshotter {
std::shared_ptr<mbgl::ThreadPool> _mbglThreadPool;
std::unique_ptr<mbgl::MapSnapshotter> _mbglMapSnapshotter;
std::unique_ptr<mbgl::Actor<mbgl::MapSnapshotter::Callback>> _snapshotCallback;
}
- (instancetype)initWithOptions:(MGLMapSnapshotOptions*)options;
{
self = [super init];
if (self) {
_options = options;
_loading = false;
mbgl::DefaultFileSource *mbglFileSource = [MGLOfflineStorage sharedOfflineStorage].mbglFileSource;
_mbglThreadPool = mbgl::sharedThreadPool();
std::string styleURL = std::string([options.styleURL.absoluteString UTF8String]);
// Size; taking into account the minimum texture size for OpenGL ES
// For non retina screens the ratio is 1:1 MGLSnapshotterMinimumPixelSize
mbgl::Size size = {
static_cast<uint32_t>(MAX(options.size.width, MGLSnapshotterMinimumPixelSize)),
static_cast<uint32_t>(MAX(options.size.height, MGLSnapshotterMinimumPixelSize))
};
float pixelRatio = MAX(options.scale, 1);
// Camera options
mbgl::CameraOptions cameraOptions;
if (CLLocationCoordinate2DIsValid(options.camera.centerCoordinate)) {
cameraOptions.center = MGLLatLngFromLocationCoordinate2D(options.camera.centerCoordinate);
}
cameraOptions.angle = MAX(0, options.camera.heading) * mbgl::util::DEG2RAD;
cameraOptions.zoom = MAX(0, options.zoomLevel);
cameraOptions.pitch = MAX(0, options.camera.pitch);
// Region
mbgl::optional<mbgl::LatLngBounds> coordinateBounds;
if (!MGLCoordinateBoundsIsEmpty(options.coordinateBounds)) {
coordinateBounds = MGLLatLngBoundsFromCoordinateBounds(options.coordinateBounds);
}
// Create the snapshotter
_mbglMapSnapshotter = std::make_unique<mbgl::MapSnapshotter>(*mbglFileSource, *_mbglThreadPool, styleURL, size, pixelRatio, cameraOptions, coordinateBounds);
}
return self;
}
- (void)startWithCompletionHandler:(MGLMapSnapshotCompletionHandler)completion;
{
[self startWithQueue:dispatch_get_main_queue() completionHandler:completion];
}
- (void)startWithQueue:(dispatch_queue_t)queue completionHandler:(MGLMapSnapshotCompletionHandler)completion;
{
if ([self isLoading]) {
[NSException raise:NSInternalInconsistencyException
format:@"Already started this snapshotter."];
}
_loading = true;
dispatch_async(queue, ^{
_snapshotCallback = std::make_unique<mbgl::Actor<mbgl::MapSnapshotter::Callback>>(*mbgl::Scheduler::GetCurrent(), [=](std::exception_ptr mbglError, mbgl::PremultipliedImage image) {
_loading = false;
if (mbglError) {
NSString *description = @(mbgl::util::toString(mbglError).c_str());
NSDictionary *userInfo = @{NSLocalizedDescriptionKey: description};
NSError *error = [NSError errorWithDomain:MGLErrorDomain code:MGLErrorCodeSnapshotFailed userInfo:userInfo];
// Dispatch result to origin queue
dispatch_async(queue, ^{
completion(nil, error);
});
} else {
#if TARGET_OS_IPHONE
MGLImage *mglImage = [[MGLImage alloc] initWithMGLPremultipliedImage:std::move(image) scale:self.options.scale];
#else
MGLImage *mglImage = [[MGLImage alloc] initWithMGLPremultipliedImage:std::move(image)];
#endif
// Process image watermark in a work queue
dispatch_queue_t workQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(workQueue, ^{
#if TARGET_OS_IPHONE
UIImage *logoImage = [UIImage imageNamed:@"mapbox" inBundle:[NSBundle mgl_frameworkBundle] compatibleWithTraitCollection:nil];
UIGraphicsBeginImageContextWithOptions(mglImage.size, NO, self.options.scale);
[mglImage drawInRect:CGRectMake(0, 0, mglImage.size.width, mglImage.size.height)];
[logoImage drawInRect:CGRectMake(MGLLogoImagePosition.x, mglImage.size.height - (MGLLogoImagePosition.y + logoImage.size.height), logoImage.size.width,logoImage.size.height)];
UIImage *compositedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
#else
NSImage *logoImage = [[NSImage alloc] initWithContentsOfFile:[[NSBundle mgl_frameworkBundle] pathForResource:@"mapbox" ofType:@"pdf"]];
NSImage *sourceImage = mglImage;
NSSize targetSize = NSMakeSize(self.options.size.width, self.options.size.height);
NSRect targetFrame = NSMakeRect(0, 0, targetSize.width, targetSize.height);
NSImage *compositedImage = nil;
NSImageRep *sourceImageRep = [sourceImage bestRepresentationForRect:targetFrame
context:nil
hints:nil];
compositedImage = [[NSImage alloc] initWithSize:targetSize];
[compositedImage lockFocus];
[sourceImageRep drawInRect: targetFrame];
[logoImage drawInRect:CGRectMake(MGLLogoImagePosition.x, MGLLogoImagePosition.y, logoImage.size.width,logoImage.size.height)];
[compositedImage unlockFocus];
#endif
// Dispatch result to origin queue
dispatch_async(queue, ^{
completion(compositedImage, nil);
});
});
}
});
_mbglMapSnapshotter->snapshot(_snapshotCallback->self());
});
}
- (void)cancel;
{
_snapshotCallback.reset();
_mbglMapSnapshotter.reset();
}
@end
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