Big Muscle

Yeah, vertex layout is known. Draw is classic device->Draw. I have no problem to modify the vertex buffer. The only problem is how to correctly and fastly compute the new coordinates (the request is to add 8 pixels to each edge of rendered primitive).

 Yes, the old functions come back (as I remember correctly it was something like Draw<0> is executed e.g. 500x, then function was swapped). Weird thing is that it does not happen always. Currently I wanted to track down how often the functions are swapped but it does not occur now :-/

However, some time ago, I was using following snippet running as background thread:

while(true)
{
   if(device->Draw != myDraw)
      rehook();

   Sleep(xxx);
}

it just hooks Draw function still around. If sleep is not used then it works "correctly" (there is still possible race condition but very rare) - but consumes 100% CPU.. When there is Sleep (with > 0 ms) then it does not work, so the functions are swapped very often. Also, it is not something like "if(some_condition_is_true) Draw<0> else Draw<1>", The function pointer is changed directly in the device object's virtual address table.

so still something wrong, sometimes the value is incorrect.

Yes! +2 works with correct RGBA offset! thanks!

I tried to dump that buffer and it seems to be stored there, but not as pure alpha, but rather (1.0 - alpha). The blend state is following if it depends:

blendStateDesc.RenderTarget[0].BlendEnable = TRUE
blendStateDesc.RenderTarget[0].SrcBlend = D3D11_BLEND_ONE

blendStateDesc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA

blendStateDesc.RenderTarget[0].BlendOp =  D3D11_BLEND_OP_ADD

blendStateDesc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ONE

blendStateDesc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA6
blendStateDesc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD

blendStateDesc.RenderTarget[0].RenderTargetWriteMask = 15

Now I need to find the correct index in constant buffer as it is on different position than I computed. I would expect that R-G-B-A has offsets 0-4-8-12, so alpha value is at offset 12. But here it seems to be at 8, so I think I have overlooked something in the shader assembly.