Hello !
First, thanks for this forum, as I got my answers here very often.
I'm trying to make some graphic modifications to an old 2D game, and because the .exe is not easily reverse-engineerable (nor the game data file) I succeeded by creating a d3d9.dll proxy.
The modifications were simple so far (removing some elements, adjusting screen size), I've done that by hooking the SetViewport function and the DrawIndexedPrimitiveUP (and checking textures of elements I wanted to remove).
Now what I wanted is to rotate some letters elements (drew by a DrawPrimitiveUP call).
I tried SetTransform methods with no luck.
Checking when letters are drawn gives this inside PIX:
I think I read somewhere that using a vertex shader may avoid SetTransform to work ? Is this correct ?
So I thought that I could create a new VertexShader that is the same as the disassembled one (as it is not too complex, I think I can do that) that also adds the rotation, and applying it in a proxy DrawPrimitiveUP method before drawing the letter.
Am I going in the right direction ?
How should I override the VertexShader ?
I've never done this before (directx programming, custom dll injection), so I'm maybe missing something obvious here.
Thanks for any help !
