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#include <mbgl/util/image.hpp>
#include <mbgl/util/premultiply.hpp>
#include <mbgl/util/logging.hpp>
extern "C"
{
#include <webp/decode.h>
}
namespace mbgl {
PremultipliedImage decodeWebP(const uint8_t* data, size_t size) {
int width = 0, height = 0;
if (WebPGetInfo(data, size, &width, &height) == 0) {
throw std::runtime_error("failed to retrieve WebP basic header information");
}
int stride = width * 4;
size_t webpSize = stride * height;
auto webp = std::make_unique<uint8_t[]>(webpSize);
if (!WebPDecodeRGBAInto(data, size, webp.get(), webpSize, stride)) {
throw std::runtime_error("failed to decode WebP data");
}
UnassociatedImage image({ static_cast<uint32_t>(width), static_cast<uint32_t>(height) },
std::move(webp));
return util::premultiply(std::move(image));
}
} // namespace mbgl
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