1997
Spencer Kimball & Peter Mattis
Gets the value of the pixel at the specified coordinates.
This procedure gets the pixel value at the specified coordinates. The 'num_channels' argument must always be equal to the bytes-per-pixel value for the specified drawable.
unknown
Type | Name | Description |
---|---|---|
PF_DRAWABLE | drawable | The drawable |
PF_INT | x-coord | The x coordinate (x-coord >= 0) |
PF_INT | y-coord | The y coordinate (y-coord >= 0) |
Type | Name | Description |
---|---|---|
PF_INT | num-channels | The number of channels for the pixel (num-channels >= 0) |
unknown | pixel | The pixel value |