blob: 6f90fe02f5dc89c2e327767f1dbf2695a5895d35 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
#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
|
