Reads a pixel from a bitmap.
Reads a pixel from point (x, y) in the bitmap.
Returns -1 if the point lies outside the bitmap (ignoring the clipping
rectangle), otherwise the value of the pixel in the color format of the
Warning: -1 is also a valid value for pixels contained in 32-bit bitmaps
with alpha channel (when R,G,B,A are all equal to 255) so you can't use
the test against -1 as a predicate for such bitmaps. In this cases, the
only reliable predicate is is_inside_bitmap().
To extract the individual color components, use the getr() / getg() /
getb() / geta() family of functions.
The following threads each have code containing this keyword:
Note: You can click on the numbers to jump directly to the posts that reference this page.
The following projects include source code containing this keyword: