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#include <mbgl/style/image_impl.hpp>
#include <mbgl/util/exception.hpp>
namespace mbgl {
namespace style {
namespace {
bool validateStretch(const ImageStretches& stretches, const float size) {
if (stretches.empty()) {
return true;
}
float last = 0;
for (auto& part : stretches) {
if (part.first < last || part.second < part.first || size < part.second) {
return false;
}
last = part.second;
}
return true;
}
bool validateContent(const ImageContent& content, const Size& size) {
if (content.left < 0 || size.width < content.left) return false;
if (content.top < 0 || size.height < content.top) return false;
if (content.right < 0 || size.width < content.right) return false;
if (content.bottom < 0 || size.height < content.bottom) return false;
if (content.right < content.left) return false;
if (content.bottom < content.top) return false;
return true;
}
} // namespace
Image::Impl::Impl(std::string id_,
PremultipliedImage&& image_,
const float pixelRatio_,
bool sdf_,
ImageStretches stretchX_,
ImageStretches stretchY_,
optional<ImageContent> content_)
: id(std::move(id_)),
image(std::move(image_)),
pixelRatio(pixelRatio_),
sdf(sdf_),
stretchX(std::move(stretchX_)),
stretchY(std::move(stretchY_)),
content(content_
? std::move(*content_)
: ImageContent{0, 0, static_cast<float>(image.size.width), static_cast<float>(image.size.height)}) {
if (!image.valid()) {
throw util::StyleImageException("dimensions may not be zero");
} else if (pixelRatio <= 0) {
throw util::StyleImageException("pixelRatio may not be <= 0");
} else if (!validateStretch(stretchX, image.size.width)) {
throw util::StyleImageException("stretchX is out of bounds or overlapping");
} else if (!validateStretch(stretchY, image.size.height)) {
throw util::StyleImageException("stretchY is out of bounds or overlapping");
} else if (!validateContent(content, image.size)) {
throw util::StyleImageException("content area is invalid");
}
}
} // namespace style
} // namespace mbgl
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