Legend:

G - Group.
I - Is implemented.
D - Is documented.
T - Has test.
E - Has example.

 1 - color control.
 2 - drawing commands.

Function__________________________________________|_G|I|D|T|E|
gdImageColorAllocate______________________________|__|_|_|_|_|
gdImageSetPixel___________________________________|__|_|_|_|_|
gdImageLine_______________________________________|__|_|_|_|_|
gdImageRectangle__________________________________|__|_|_|_|_|
gdImageFilledRectangle____________________________|__|_|_|_|_|
gdImageArc________________________________________|__|_|_|_|_|
gdImageFilledArc__________________________________|__|_|_|_|_|
gdImageEllipse____________________________________|__|_|_|_|_|
gdImageFilledEllipse______________________________|__|_|_|_|_|
gdImagePolygon____________________________________|__|_|_|_|_|
gdImageOpenPolygon________________________________|__|_|_|_|_|
gdImageFilledPolygon______________________________|__|_|_|_|_|
gdImageGif________________________________________|__|_|_|_|_|
gdImageCreate_____________________________________|__|_|_|_|_|
gdImageJpeg_______________________________________|__|_|_|_|_|
gdImagePng________________________________________|__|_|_|_|_|
gdImageDestroy____________________________________|__|_|_|_|_|
