Can pgf support /ShadingType 5?

[cspshare]

For complex gradients, “/ShadingType 5” is very useful, will pgf have an official implementation for that type of shading in the future? I hope it could support "/ShadingType 5" shading, such as：

/inch {72 mul} def
/DeviceRGB setcolorspace
%Define the shading dictionary
<<
    /ShadingType 5 
    /ColorSpace /DeviceRGB 
    /VerticesPerRow 2 
    /DataSource [
        1 inch 1 inch    1 0 1  %Magenta at bottom left 
        7 inch 1 inch    0 1 1  %Cyan at bottom right
        2 inch 10 inch    0 1 1  %Cyan at top left
        8 inch 10 inch    1 0 1  %Magenta at top right
  ]
>> shfill
showpage

[hmenke]

Relevated pages from the PDF 1.7 Standard

[hmenke]

Is there any information on how is the viewer support for this? I don't want to invest into anything that is only implemented by Adobe Reader.

[cspshare]

It supported well by kinds of pdf reader and web browsers and with Pretty awesome rendering efficiency. The following tools are what I have tested: Adobe Acrobat, PDF-XChange, SumatraPDF, OKular, Firefox, Google Chrome, Microsoft Edge, Brave.

here is the postscript code:

%!PS-Adobe-3.0 EPSF-3.0

<< /PageSize [80 100] >> setpagedevice
/inch {10 mul} def

/DeviceRGB setcolorspace

%Define the shading dictionary
/pic{
<<
    /ShadingType 5 
    /ColorSpace /DeviceRGB 
    /VerticesPerRow 3
    /DataSource [
        0  0    1 0 1  
        40 0    1 0 1  
        80 0    0 1 1 
        0  50    1 0.2 .1 
        40  50    1 0.2 .1 
        80  50    0.2 1 0.1 
        0  100    0 1 1 
        40  100    0 1 1 
        80  100    1 0 1
  ]

>> shfill
}def
pic 
showpage

as well as the output pdf:
ps2test.pdf