The function converts the color specified in the structure into RGB values. It then uses this RGB specification in an structure, whose three flags and are set, in a call to to change the color cell specified by the pixel member of the structure. This pixel value must be a valid index for the specified colormap, and the color cell specified by the pixel value must be a read/write cell. If the pixel value is not a valid index, a error results. If the color cell is unallocated or is allocated read-only, a error results. If the colormap is an installed map for its screen, the changes are visible immediately.
Note that has no return value; therefore, an return value from this function indicates that the conversion to RGB succeeded and the call to was made. To obtain the actual color stored, use Because of the screen's hardware limitations or gamut compression, the color stored in the colormap may not be identical to the color specified.
can generate and errors.
The function converts the colors specified in the array of structures into RGB values and then uses these RGB specifications in structures, whose three flags and are set, in a call to to change the color cells specified by the pixel member of the corresponding structure. Each pixel value must be a valid index for the specified colormap, and the color cell specified by each pixel value must be a read/write cell. If a pixel value is not a valid index, a error results. If a color cell is unallocated or is allocated read-only, a error results. If more than one pixel is in error, the one that gets reported is arbitrary. If the colormap is an installed map for its screen, the changes are visible immediately.
Note that has no return value; therefore, an return value from this function indicates that conversions to RGB succeeded and the call to was made. To obtain the actual colors stored, use Because of the screen's hardware limitations or gamut compression, the colors stored in the colormap may not be identical to the colors specified.
can generate and errors.