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#include <mbgl/util/image.hpp>
#import <ImageIO/ImageIO.h>
#if TARGET_OS_IPHONE
#import <MobileCoreServices/MobileCoreServices.h>
#else
#import <CoreServices/CoreServices.h>
#endif
namespace mbgl {
namespace util {
std::string compress_png(int width, int height, void *rgba) {
CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, rgba, width * height * 4, NULL);
if (!provider) {
return "";
}
CGColorSpaceRef color_space = CGColorSpaceCreateDeviceRGB();
if (!color_space) {
CGDataProviderRelease(provider);
return "";
}
CGImageRef image = CGImageCreate(width, height, 8, 32, 4 * width, color_space,
kCGBitmapByteOrderDefault | kCGImageAlphaLast, provider, NULL, false,
kCGRenderingIntentDefault);
if (!image) {
CGColorSpaceRelease(color_space);
CGDataProviderRelease(provider);
return "";
}
CFMutableDataRef data = CFDataCreateMutable(kCFAllocatorDefault, 0);
if (!data) {
CGImageRelease(image);
CGColorSpaceRelease(color_space);
CGDataProviderRelease(provider);
return "";
}
CGImageDestinationRef image_destination = CGImageDestinationCreateWithData(data, kUTTypePNG, 1, NULL);
if (!image_destination) {
CFRelease(data);
CGImageRelease(image);
CGColorSpaceRelease(color_space);
CGDataProviderRelease(provider);
return "";
}
CGImageDestinationAddImage(image_destination, image, NULL);
CGImageDestinationFinalize(image_destination);
const std::string result {
reinterpret_cast<const char *>(CFDataGetBytePtr(data)),
static_cast<size_t>(CFDataGetLength(data))
};
CFRelease(image_destination);
CFRelease(data);
CGImageRelease(image);
CGColorSpaceRelease(color_space);
CGDataProviderRelease(provider);
return result;
}
Image::Image(const std::string &source_data) {
CFDataRef data = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, reinterpret_cast<const unsigned char *>(source_data.data()), source_data.size(), kCFAllocatorNull);
if (!data) {
return;
}
CGImageSourceRef image_source = CGImageSourceCreateWithData(data, NULL);
if (!image_source) {
CFRelease(data);
return;
}
CGImageRef image = CGImageSourceCreateImageAtIndex(image_source, 0, NULL);
if (!image) {
CFRelease(image_source);
CFRelease(data);
return;
}
CGColorSpaceRef color_space = CGColorSpaceCreateDeviceRGB();
if (!color_space) {
CGImageRelease(image);
CFRelease(image_source);
CFRelease(data);
return;
}
width = CGImageGetWidth(image);
height = CGImageGetHeight(image);
CGRect rect = {{ 0, 0 }, { static_cast<CGFloat>(width), static_cast<CGFloat>(height) }};
img = ::std::unique_ptr<char[]>(new char[width * height * 4]());
CGContextRef context = CGBitmapContextCreate(img.get(), width, height, 8, width * 4,
color_space, kCGImageAlphaPremultipliedLast);
if (!context) {
CGColorSpaceRelease(color_space);
CGImageRelease(image);
CFRelease(image_source);
CFRelease(data);
width = 0;
height = 0;
img.release();
return;
}
CGContextSetBlendMode(context, kCGBlendModeCopy);
CGContextDrawImage(context, rect, image);
CGContextRelease(context);
CGColorSpaceRelease(color_space);
CGImageRelease(image);
CFRelease(image_source);
CFRelease(data);
}
}
}
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