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#import "UIImage+MGLAdditions.h"
@implementation UIImage (MGLAdditions)
- (nullable instancetype)initWithMGLSpriteImage:(const mbgl::SpriteImage *)spriteImage
{
std::string png = encodePNG(spriteImage->image);
NSData *data = [[NSData alloc] initWithBytes:png.data() length:png.size()];
return [self initWithData:data scale:spriteImage->pixelRatio];
}
- (std::unique_ptr<mbgl::SpriteImage>)mgl_spriteImage
{
CGImageRef cgImage = self.CGImage;
size_t width = CGImageGetWidth(cgImage);
size_t height = CGImageGetHeight(cgImage);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
mbgl::PremultipliedImage cPremultipliedImage(width, height);
size_t bytesPerPixel = 4;
size_t bytesPerRow = bytesPerPixel * width;
size_t bitsPerComponent = 8;
CGContextRef context = CGBitmapContextCreate(cPremultipliedImage.data.get(),
width, height, bitsPerComponent, bytesPerRow,
colorSpace, kCGImageAlphaPremultipliedLast);
CGContextDrawImage(context, CGRectMake(0, 0, width, height), cgImage);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
return std::make_unique<mbgl::SpriteImage>(std::move(cPremultipliedImage), float(self.scale));
}
@end
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