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[ios, macos] Add attribution to snapshots.

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This commit is contained in:
Fabian Guerra
2017-11-01 19:37:31 -04:00
committed by Fabian Guerra Soto
parent 24de48b772
commit 93e363bd8c
1 changed files with 117 additions and 2 deletions
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119
platform/darwin/src/MGLMapSnapshotter.mm
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@@ -14,11 +14,14 @@
#import "MGLGeometry_Private.h"
#import "NSBundle+MGLAdditions.h"
#import "MGLStyle.h"
#import "MGLAttributionInfo_Private.h"
#if TARGET_OS_IPHONE
#import "UIImage+MGLAdditions.h"
#else
#import "NSImage+MGLAdditions.h"
#import <CoreGraphics/CoreGraphics.h>
#import <QuartzCore/QuartzCore.h>
#endif
const CGPoint MGLLogoImagePosition = CGPointMake(8, 8);
@@ -146,6 +149,33 @@ const CGFloat MGLSnapshotterMinimumPixelSize = 64;
dispatch_async(queue, ^{
_snapshotCallback = std::make_unique<mbgl::Actor<mbgl::MapSnapshotter::Callback>>(*mbgl::Scheduler::GetCurrent(), [=](std::exception_ptr mbglError, mbgl::PremultipliedImage image, mbgl::MapSnapshotter::Attributions attributions, mbgl::MapSnapshotter::PointForFn pointForFn) {
_loading = false;
NSMutableArray *infos = [NSMutableArray array];
#if TARGET_OS_IPHONE
CGFloat fontSize = [UIFont smallSystemFontSize];
UIColor *attributeFontColor = [UIColor blackColor];
#else
CGFloat fontSize = [NSFont systemFontSizeForControlSize:NSMiniControlSize];
NSColor *attributeFontColor = [NSColor blackColor];
#endif
for (auto attribution = attributions.begin(); attribution != attributions.end(); ++attribution) {
NSString *attributionHTMLString = @(attribution->c_str());
NSArray *tileSetInfos = [MGLAttributionInfo attributionInfosFromHTMLString:attributionHTMLString
fontSize:fontSize
linkColor:attributeFontColor];
[infos growArrayByAddingAttributionInfosFromArray:tileSetInfos];
}
CGSize attributionBackgroundSize = CGSizeMake(10, 0);
for (MGLAttributionInfo *info in infos) {
if (info.isFeedbackLink) {
continue;
}
attributionBackgroundSize.width += [info.title size].width + 10;
attributionBackgroundSize.height = MAX([info.title size].height, attributionBackgroundSize.height);
}
if (mbglError) {
NSString *description = @(mbgl::util::toString(mbglError).c_str());
NSDictionary *userInfo = @{NSLocalizedDescriptionKey: description};
@@ -170,10 +200,33 @@ const CGFloat MGLSnapshotterMinimumPixelSize = 64;
#if TARGET_OS_IPHONE
UIImage *logoImage = [UIImage imageNamed:@"mapbox" inBundle:[NSBundle mgl_frameworkBundle] compatibleWithTraitCollection:nil];
CGRect logoImageRect = CGRectMake(MGLLogoImagePosition.x, mglImage.size.height - (MGLLogoImagePosition.y + logoImage.size.height), logoImage.size.width, logoImage.size.height);
CGPoint attributionTextPosition = CGPointMake(mglImage.size.width - 10 - attributionBackgroundSize.width,
logoImageRect.origin.y + (logoImageRect.size.height / 2) - (attributionBackgroundSize.height / 2));
CGRect cropRect = CGRectMake(attributionTextPosition.x * mglImage.scale, (attributionTextPosition.y + 1) * mglImage.scale, attributionBackgroundSize.width * mglImage.scale, attributionBackgroundSize.height * mglImage.scale);
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)];
[logoImage drawInRect:logoImageRect];
UIImage *currentImage = UIGraphicsGetImageFromCurrentImageContext();
CGImageRef attributionImageRef = CGImageCreateWithImageInRect([currentImage CGImage], cropRect);
UIImage *attributionImage = [UIImage imageWithCGImage:attributionImageRef];
CGImageRelease(attributionImageRef);
CIImage *ciAttributionImage = [[CIImage alloc] initWithCGImage:attributionImage.CGImage];
UIImage *blurredAttributionBackground = [self blurredAttributionBackground:ciAttributionImage];
[blurredAttributionBackground drawInRect:CGRectMake(attributionTextPosition.x, attributionTextPosition.y + 1, attributionBackgroundSize.width, attributionBackgroundSize.height)];
[self drawAttributionText:infos origin:CGPointMake(attributionTextPosition.x + 10, attributionTextPosition.y)];
UIImage *compositedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
@@ -183,6 +236,11 @@ const CGFloat MGLSnapshotterMinimumPixelSize = 64;
NSSize targetSize = NSMakeSize(self.options.size.width, self.options.size.height);
NSRect targetFrame = NSMakeRect(0, 0, targetSize.width, targetSize.height);
CGRect logoImageRect = CGRectMake(MGLLogoImagePosition.x, MGLLogoImagePosition.y, logoImage.size.width, logoImage.size.height);
CGPoint attributionTextPosition = CGPointMake(targetFrame.size.width - 10 - attributionBackgroundSize.width,
logoImageRect.origin.y + (logoImageRect.size.height / 2) - (attributionBackgroundSize.height / 2));
NSImage *compositedImage = nil;
NSImageRep *sourceImageRep = [sourceImage bestRepresentationForRect:targetFrame
context:nil
@@ -190,10 +248,26 @@ const CGFloat MGLSnapshotterMinimumPixelSize = 64;
compositedImage = [[NSImage alloc] initWithSize:targetSize];
[compositedImage lockFocus];
[sourceImageRep drawInRect: targetFrame];
[logoImage drawInRect:CGRectMake(MGLLogoImagePosition.x, MGLLogoImagePosition.y, logoImage.size.width,logoImage.size.height)];
[logoImage drawInRect:logoImageRect];
NSRect cropRect = NSMakeRect(attributionTextPosition.x, MGLLogoImagePosition.y + 1, attributionBackgroundSize.width, attributionBackgroundSize.height);
NSBitmapImageRep *attributionBackground = [[NSBitmapImageRep alloc] initWithFocusedViewRect: cropRect];
CIImage *attributionBackgroundImage = [[CIImage alloc] initWithCGImage:[attributionBackground CGImage]];
NSImage *blurredAttributionBackground = [self blurredAttributionBackground:attributionBackgroundImage];
[blurredAttributionBackground drawInRect:CGRectMake(attributionTextPosition.x, MGLLogoImagePosition.y + 1, attributionBackgroundSize.width, attributionBackgroundSize.height)];
[self drawAttributionText:infos origin:CGPointMake(attributionTextPosition.x + 10, attributionTextPosition.y)];
[compositedImage unlockFocus];
#endif
// Dispatch result to origin queue
@@ -208,6 +282,47 @@ const CGFloat MGLSnapshotterMinimumPixelSize = 64;
});
}
- (void)drawAttributionText:(NSArray *)attributionInfo origin:(CGPoint)origin
{
for (MGLAttributionInfo *info in attributionInfo) {
if (info.isFeedbackLink) {
continue;
}
[info.title drawAtPoint:origin];
origin.x += [info.title size].width + 10;
}
}
- (MGLImage *)blurredAttributionBackground:(CIImage *)backgroundImage
{
CGAffineTransform transform = CGAffineTransformIdentity;
CIFilter *clamp = [CIFilter filterWithName:@"CIAffineClamp"];
[clamp setValue:backgroundImage forKey:kCIInputImageKey];
[clamp setValue:[NSValue valueWithBytes:&transform objCType:@encode(CGAffineTransform)] forKey:@"inputTransform"];
CIFilter *attributionBlurFilter = [CIFilter filterWithName:@"CIGaussianBlur"];
[attributionBlurFilter setValue:[clamp outputImage] forKey:kCIInputImageKey];
[attributionBlurFilter setValue:@10 forKey:kCIInputRadiusKey];
CIFilter *attributionColorFilter = [CIFilter filterWithName:@"CIColorControls"];
[attributionColorFilter setValue:[attributionBlurFilter outputImage] forKey:kCIInputImageKey];
[attributionColorFilter setValue:@(0.1) forKey:kCIInputBrightnessKey];
CIImage *blurredImage = attributionColorFilter.outputImage;
CIContext *ctx = [CIContext contextWithOptions:nil];
CGImageRef cgimg = [ctx createCGImage:blurredImage fromRect:[backgroundImage extent]];
#if TARGET_OS_IPHONE
return [UIImage imageWithCGImage:cgimg];
#else
return [[NSImage alloc] initWithCGImage:cgimg size:[backgroundImage extent].size];
#endif
}
- (void)cancel
{
_snapshotCallback.reset();