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Update blurhash

This commit is contained in:
Nicolas Werner 2020-09-06 15:05:03 +02:00
parent b05c101021
commit c2f2e8324c
1 changed files with 4 additions and 3 deletions
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7
third_party/blurhash/blurhash.cpp vendored
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@ -260,6 +260,7 @@ decode(std::string_view blurhash, size_t width, size_t height, size_t bytesPerPi
Components components{}; Components components{};
std::vector<Color> values; std::vector<Color> values;
values.reserve(blurhash.size() / 2);
try { try {
components = unpackComponents(decode83(blurhash.substr(0, 1))); components = unpackComponents(decode83(blurhash.substr(0, 1)));
@ -277,7 +278,7 @@ decode(std::string_view blurhash, size_t width, size_t height, size_t bytesPerPi
return {}; return {};
} }
i.image.reserve(height * width * 3); i.image.reserve(height * width * bytesPerPixel);
for (size_t y = 0; y < height; y++) { for (size_t y = 0; y < height; y++) {
for (size_t x = 0; x < width; x++) { for (size_t x = 0; x < width; x++) {
@ -344,7 +345,7 @@ encode(unsigned char *image, size_t width, size_t height, int components_x, int
} }
int quantisedMaximumValue = encodeMaxAC(actualMaximumValue); int quantisedMaximumValue = encodeMaxAC(actualMaximumValue);
maximumValue = ((float)quantisedMaximumValue + 1) / 166; maximumValue = ((float)quantisedMaximumValue + 1) / 166;
h += leftPad(encode83(quantisedMaximumValue), 1); h += leftPad(encode83(quantisedMaximumValue), 1);
} else { } else {
maximumValue = 1; maximumValue = 1;
@ -406,7 +407,7 @@ TEST_CASE("AC")
{ {
auto h = "00%#MwS|WCWEM{R*bbWBbH"sv; auto h = "00%#MwS|WCWEM{R*bbWBbH"sv;
for (size_t i = 0; i < h.size(); i += 2) { for (size_t i = 0; i < h.size(); i += 2) {
auto s = h.substr(i, 2); auto s = h.substr(i, 2);
const auto maxAC = 0.289157f; const auto maxAC = 0.289157f;
CHECK(leftPad(encode83(encodeAC(decodeAC(decode83(s), maxAC), maxAC)), 2) == s); CHECK(leftPad(encode83(encodeAC(decodeAC(decode83(s), maxAC), maxAC)), 2) == s);
} }