Represents an 8-bit single-channel pixel, and can perform compositing operations on it.
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| PixelAlpha () noexcept=default |
| Creates a pixel without defining its colour. More...
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forcedinline uint32 | getNativeARGB () const noexcept |
| Returns a uint32 which represents the pixel in a platform dependent format which is compatible with the native format of a PixelARGB. More...
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forcedinline uint32 | getInARGBMaskOrder () const noexcept |
| Returns a uint32 which will be in argb order as if constructed with the following mask operation ((alpha << 24) | (red << 16) | (green << 8) | blue). More...
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uint32 | getInARGBMemoryOrder () const noexcept |
| Returns a uint32 which when written to memory, will be in the order a, r, g, b. More...
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forcedinline uint32 | getEvenBytes () const noexcept |
| Return channels with an even index and insert zero bytes between them. More...
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forcedinline uint32 | getOddBytes () const noexcept |
| Return channels with an odd index and insert zero bytes between them. More...
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forcedinline uint8 | getAlpha () const noexcept |
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forcedinline uint8 | getRed () const noexcept |
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forcedinline uint8 | getGreen () const noexcept |
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forcedinline uint8 | getBlue () const noexcept |
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template<class Pixel > |
forcedinline void | set (const Pixel &src) noexcept |
| Copies another pixel colour over this one. More...
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forcedinline void | setARGB (uint8 a_, uint8, uint8, uint8) noexcept |
| Sets the pixel's colour from individual components. More...
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template<class Pixel > |
forcedinline void | blend (const Pixel &src) noexcept |
| Blends another pixel onto this one. More...
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template<class Pixel > |
forcedinline void | blend (const Pixel &src, uint32 extraAlpha) noexcept |
| Blends another pixel onto this one, applying an extra multiplier to its opacity. More...
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template<class Pixel > |
forcedinline void | tween (const Pixel &src, uint32 amount) noexcept |
| Blends another pixel with this one, creating a colour that is somewhere between the two, as specified by the amount. More...
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forcedinline void | setAlpha (uint8 newAlpha) noexcept |
| Replaces the colour's alpha value with another one. More...
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forcedinline void | multiplyAlpha (int multiplier) noexcept |
| Multiplies the colour's alpha value with another one. More...
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forcedinline void | multiplyAlpha (float multiplier) noexcept |
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forcedinline void | premultiply () noexcept |
| Premultiplies the pixel's RGB values by its alpha. More...
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forcedinline void | unpremultiply () noexcept |
| Unpremultiplies the pixel's RGB values. More...
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forcedinline void | desaturate () noexcept |
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Represents an 8-bit single-channel pixel, and can perform compositing operations on it.
This is used internally by the imaging classes.
- See also
- PixelARGB, PixelRGB
uint32 PixelAlpha::getInARGBMemoryOrder |
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Returns a uint32 which when written to memory, will be in the order a, r, g, b.
In other words, if the return-value is read as a uint8 array then the elements will be in the order of a, r, g, b
Blends another pixel onto this one, applying an extra multiplier to its opacity.
The opacity of the pixel being overlaid is scaled by the extraAlpha factor before being used, so this can blend semi-transparently from a PixelRGB argument.
References gl::a, int(), gl::src, and gl::srcAlpha.