32 lines
884 B
C++
32 lines
884 B
C++
#include <mbgl/util/image.hpp>
|
|
#include <mbgl/util/premultiply.hpp>
|
|
#include <mbgl/platform/log.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<uint16_t>(width), static_cast<uint16_t>(height),
|
|
std::move(webp) };
|
|
return util::premultiply(std::move(image));
|
|
}
|
|
|
|
} // namespace mbgl
|