feedc0de/NeoPixelBus
1
0 Fork 0
forked from Makuna/NeoPixelBus
Code Pull Requests Activity

Fix 8bit math (#360)

Browse Source
This commit is contained in:
Michael Miller authored and GitHub committed 2020-07-27 11:38:47 -07:00
1 parent ad38b97f8b
commit 0f45e8d481
2 files changed
+12 -6
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

src/internal/RgbColor.h
+6 -3
View File
@@ -178,18 +178,21 @@ struct RgbColor
private:
inline static uint8_t _elementDim(uint8_t value, uint8_t ratio)
{
return (value * (ratio + 1)) >> 8;
return (static_cast<uint16_t>(value) * (static_cast<uint16_t>(ratio) + 1)) >> 8;
}
inline static uint8_t _elementBrighten(uint8_t value, uint8_t ratio)
{
uint16_t element = (value << 8) / (ratio + 1);
uint16_t element = ((static_cast<uint16_t>(value) + 1) << 8) / (static_cast<uint16_t>(ratio) + 1);
if (element > 255)
{
element = 255;
}
else
{
element -= 1;
}
return element;
}
};
src/internal/RgbwColor.h
+6 -3
View File
@@ -208,18 +208,21 @@ struct RgbwColor
private:
inline static uint8_t _elementDim(uint8_t value, uint8_t ratio)
{
return (value * (ratio + 1)) >> 8;
return (static_cast<uint16_t>(value) * (static_cast<uint16_t>(ratio) + 1)) >> 8;
}
inline static uint8_t _elementBrighten(uint8_t value, uint8_t ratio)
{
uint16_t element = (value << 8) / (ratio + 1);
uint16_t element = ((static_cast<uint16_t>(value) + 1) << 8) / (static_cast<uint16_t>(ratio) + 1);
if (element > 255)
{
element = 255;
}
else
{
element -= 1;
}
return element;
}
};