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#pragma once
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/util/size.hpp>
#include <string>
#include <memory>
#include <algorithm>
namespace mbgl {
enum ImageAlphaMode {
Unassociated,
Premultiplied
};
template <ImageAlphaMode Mode>
class Image : private util::noncopyable {
public:
Image() = default;
Image(Size size_)
: size(std::move(size_)),
data(std::make_unique<uint8_t[]>(bytes())) {}
Image(Size size_, std::unique_ptr<uint8_t[]> data_)
: size(std::move(size_)),
data(std::move(data_)) {}
Image(Image&& o)
: size(o.size),
data(std::move(o.data)) {}
Image& operator=(Image&& o) {
size = o.size;
data = std::move(o.data);
return *this;
}
bool operator==(const Image& rhs) const {
return size == rhs.size &&
std::equal(data.get(), data.get() + bytes(), rhs.data.get(),
rhs.data.get() + rhs.bytes());
}
bool valid() const {
return size && data.get() != nullptr;
}
size_t stride() const { return static_cast<size_t>(size.width) * 4; }
size_t bytes() const { return stride() * size.height; }
Size size;
std::unique_ptr<uint8_t[]> data;
};
using UnassociatedImage = Image<ImageAlphaMode::Unassociated>;
using PremultipliedImage = Image<ImageAlphaMode::Premultiplied>;
// TODO: don't use std::string for binary data.
PremultipliedImage decodeImage(const std::string&);
std::string encodePNG(const PremultipliedImage&);
} // namespace mbgl
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