Additional Blend Modes

[Ed Harvey]

I've been meaning to post this for ages, but I always forgot...

Here are a lot of the cool blend modes that Photoshop has, but Paint.NET is missing (horrible grammar, but it's 9am and I've been working all night!) I missed them, and so took the time to code them up

These are just code snippets for UserBlendOps.Generated.H.cs - you will also need to add the appropriate DEFINE_STANDARD_OP and name resources.

This is probably of limited use unless you know your way around the codebase , but someone might benefit...

//Copyright EdHarvey 2006
//DWTFYWWI LICENSE V1.


#define HARDLIGHT(A, B, r) \
{  \
   if (( < 128) \
   { \
       INT_SCALE(2 * (, (A), r); \
   } \
   else \
   { \
       INT_SCALE(2 * (255 - (), 255 - (A), r); \
       r = 255 - r; \
   } \
}

#define SOFTLIGHT(A, B, r) \
{  \
   int r1 = ((255-() * (A) * ();\
   int r2 = ( * (65535-((255-(A)) * (255-())); \
   int r3 = r1 + r2 + 32768; \
   r = r3 >> 16; \
}

#define HARDMIX(A, B, r) \
{  \
   if (((A)+() <= 255) \
   { \
       r = 0; \
   } \
   else \
   { \
       r = 255; \
   } \
}

#define EXCLUSION(A, B, r) \
{  \
   int r1=((255 - () * (A)); \
   int r2=(( * (255 - (A))); \
   int r3 = r1 + r2;\
   r = r3>>8; \
}

#define LINEARBURN(A, B, r) \
{  \
   int sum = (A)+(; \
   if (sum <= 255) \
   { \
       r = 0; \
   } \
   else \
   { \
       r = sum - 256; \
   } \
}

#define LINEARDODGE(A, B, r) \
{ \
   int sum = (A)+(; \
   if (sum >= 255) \
   { \
       r = 255; \
   } \
   else \
   { \
       r = sum; \
   } \
}    

#define LINEARLIGHT(A, B, r) \
{ \
   r = ((2*A)+(-256); \
   if (r > 255) \
   { \
       r = 255; \
   } \
   else if (r < 0) \
   { \
       r = 0; \
   } \
}    

#define PINLIGHT(A, B, r) \
{  \
   if ((A) < 128) \
   { \
   r = Math.Min(A*2, ; \
   } \
   else \
   { \
   r = Math.Max((A-128)*2, ; \
   } \
}

#define VIVIDLIGHT(A, B, r) \
{  \
   if ((A) < 128) \
   { \
       if ((A) == 0) \
       { \
           r = 0; \
       } \
       else \
       { \
           INT_DIV(((255 - () * 255), (2*A), r); \
           r = 255 -  r; \
           r = Math.Max(0, r); \
       } \
   } \
   else \
   { \
       if ((A) == 255) \
       { \
           r = 255; \
       } \
       else \
       { \
           INT_DIV((( * 255), (255 - ((A-128)*2)), r); \
           r = Math.Min(255, r); \
       } \
   } \
}

#define SOFTDODGE(A, B, r) \
{ \
   int sum = (A)+(; \
   if (sum < 256) \
   { \
       if (( == 255) \
       { \
           r = 255; \
       } \
       else \
       { \
           int c = ((A) << 7) / (255-(); \
           if (c > 255) \
           { \
               r = 255; \
           } \
           else  \
           { \
               r = c; \
           } \
       } \
   } \
   else \
   { \
       int c = 255 - (((255-() << 7) / (A)); \
       if (c < 0)  \
       { \
           r = 0; \
       } \
       else \
       { \
           r = c; \
       } \
   } \
}   

#define SOFTBURN(A, B, r) \
{ \
   int a1 = 255-(A); \
   int b1 = 255-(; \
   int r1=0; \
   int sum = a1+b1; \
   if (sum < 256) \
   { \
       if (b1 == 255) \
       { \
           r1 = 255; \
       } \
       else \
       { \
           int c = (a1 << 7) / (255-b1); \
           if (c > 255) \
           { \
               r1 = 255; \
           } \
           else  \
           { \
               r1 = c; \
           } \
       } \
   } \
   else \
   { \
       int c = 255 - (((255-b1) << 7) / a1); \
       if (c < 0)  \
       { \
           r1 = 0; \
       } \
       else \
       { \
           r1 = c; \
       } \
   } \
   r = 255-r1; \
} 

#define SOFTMULTIPLY(A, B, r) \
{ \
   int rx = (A) * (; \
   r = (byte)Math.Sqrt(rx); \
}

[usedHONDA]

Can you do that to winxp.exe?

[Rick Brewster]

If you make modifications like this, you won't be able to share files that use these blend modes with people that have "regular" Paint.NET installed. The files just won't work. Just an FYI.

[BoltBait]

I guess that means you need to include them in the standard build...

[Rick Brewster]

Well there's no way they can make it in for 3.0 -- everything's locked down.

[Ed Harvey]

If you make modifications like this, you won't be able to share files that use these blend modes with people that have "regular" Paint.NET installed. The files just won't work. Just an FYI.

Absolutely - I have the new modes listed after the official ones and the names have an asterisk at the start specifically to remind me not to use them for 'public' stuff

[Ed Harvey]

Well there's no way they can make it in for 3.0 -- everything's locked down.

Yeah, and you wouldn't want to just tack them on as I did; The blend mode drop-down needs to be enhanced because the usability is pretty dreadful with ~20 items in one 'lump' :shock: