Point
Returns the color attribute of a specified pixel coordinate
Syntax
`
result = Point( coord_x, coord_y [,buffer] )
or
result = Point( function_index )
`
Usage
`coord_x`
x coordinate of the pixel
`coord_y`
y coordinate of the pixel
`buffer`
the image buffer to read from
`function_index`
the type of screen coordinate to return: one of the values `0`, `1`, `2`, `3`
Return Value
The return datatype is a `ULong`.
If the `x, y` coordinates of a pixel are provided `Point` returns the color attribute at the specified coordinates, as an 8-bit palette index in 8 bpp indexed modes, a 24-bit RGB value in 16 bpp modes (upper 8 bits unused, limited precision of R,G,B), and a 32-bit RGB or RGBA value in 32 bpp modes (upper 8 bits unused or holding Alpha). Note that it does NOT return a 16-bit value (5 bits R + 6 bits G + 5 bits B).
If the argument is a function index, `Point` returns one of the graphics cursor coordinates set by the last graphics command.

Argument | Value Returned
0 | The current physical x coordinate.
1 | The current physical y coordinate.
2 | The current view x coordinate. This returns the same value as the POINT(0) function if the WINDOW statement has not been used.
3 | The current view y coordinate. This returns the same value as the POINT(1) function if the WINDOW statement has not been used.

Description
GfxLib Function with two different uses.
If supplied with two coordinates it reads the color of the pixel at the coordinate `coord_x`, `coord_y` of the screen, or of the `buffer`, if supplied.
The value return is a color index in a 256 or less color `Screen (Graphics)`, and an `RGB` value in true color modes. If the coordinates are off-screen or off-buffer, `-1` is returned
If supplied with a single value it returns the one of the coordinates of the graphics cursor as set by the last graphics command executed. If the last command was executed in a buffer, the values returned will be coordinates in the buffer. Arguments out of the range `0`-`3` will return `0`.
The function `Point` does not work in text modes.
Speed note: while `Point` provides valid results, it is quite slow to call repeatedly due to the overhead of additional calculations and checks. Much better performance can be achieved by using direct memory access using the results obtained from `ImageInfo` and `ScreenInfo`/`ScreenPtr`.
Example
`
' Set an appropriate screen mode - 320 x 240 x 8bpp indexed color
ScreenRes 320, 240, 8
' Draw a line using color 12 (light red)
Line (20,20)-(100,100), 12
' Print the color of a point on the line
Print Point(20,20)
' Sleep before the program closes
Sleep
`
Output:

    12

Version
Before fbc 1.08.0, the return datatype was an `Integer`.
Differences from QB

- `buffer` is new to FreeBASIC
- In 16 bpp and 32 bpp modes, a 32-bit value is returned instead of an 8-bit palette index

See also

- `PSet` - write pixels
- `PMap`
- `Color`
- `View (Graphics)`
- `Window`
- `Internal pixel formats`