RenderScript Conversion Functions

Converts a vector from one numerical type to another. The conversion are done entry per entry.

E.g. calling a = convert_short3(b); is equivalent to doing a.x = (short)b.x; a.y = (short)b.y; a.z = (short)b.z;.

Converting floating point values to integer types truncates.

Converting numbers too large to fit the destination type yields undefined results. For example, converting a float that contains 1.0e18 to a short is undefined. Use clamp() to avoid this.

Parameters

r	Red component.
g	Green component.
b	Blue component.
a	Alpha component.
color	Vector of 3 or 4 floats containing the R, G, B, and A values.

Packs three or four floating point RGBA values into a uchar4.

The input values are typically between 0.0f and 1.0f inclusive. For input values outside of this range, the resulting outputs will be clamped to be between 0 and 255. As this clamping may be done after the input is multiplied by 255.f and converted to an integer, input numbers greater than INT_MAX/255.f or less than INT_MIN/255.f result in undefined behavior.

If the alpha component is not specified, it is assumed to be 1.0, i.e. the result will have an alpha set to 255.

Unpacks a uchar4 color to float4. The resulting floats will be between 0.0 and 1.0 inclusive.

Parameters

y	Luminance component.
u	U chrominance component.
v	V chrominance component.

Converts a color from a YUV representation to RGBA.

We currently don't provide a function to do the reverse conversion.