28 lines
988 B
Plaintext
28 lines
988 B
Plaintext
#import "UIImage+MGLAdditions.h"
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@implementation UIImage (MGLAdditions)
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- (std::unique_ptr<mbgl::SpriteImage>)mgl_spriteImage
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{
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CGImageRef cgImage = self.CGImage;
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size_t width = CGImageGetWidth(cgImage);
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size_t height = CGImageGetHeight(cgImage);
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CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
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mbgl::PremultipliedImage cPremultipliedImage({ static_cast<uint32_t>(width), static_cast<uint32_t>(height) });
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size_t bytesPerPixel = 4;
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size_t bytesPerRow = bytesPerPixel * width;
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size_t bitsPerComponent = 8;
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CGContextRef context = CGBitmapContextCreate(cPremultipliedImage.data.get(),
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width, height, bitsPerComponent, bytesPerRow,
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colorSpace, kCGImageAlphaPremultipliedLast);
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CGContextDrawImage(context, CGRectMake(0, 0, width, height), cgImage);
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CGContextRelease(context);
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CGColorSpaceRelease(colorSpace);
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return std::make_unique<mbgl::SpriteImage>(std::move(cPremultipliedImage), float(self.scale));
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}
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@end
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