What I want to implement is: The application writes texts on a window using GDI as usual, and sets the color key. The inside blends the window content onto a d3d9 surface and show in that window. When using ddraw7, I can easily set the color key and overlay to realize this. Now I want to use pixel shader, so it should be a d3dsurface9. I don''t want to change the code to d3d DrawText. I can use Id3dsurface9->GetDC() and provide the dc to the application. But to be able to getdc, the surface should not be A8R8G8B8, it should be X8R8G8B8, etc., so I can not alpha blend it directly. I can copy from X8R8G8B8 to A8R8G8B8, but that''s slow. I can blend it in the shader program, that''s the only solution I''ve found, it increases the shader length. Any better solution?

quote:Original post by Nik02
One optimization you could do, if I didn''t convert you to ID3DXFont: draw the text to a texture, and use that texture to transfer the text to the backbuffer. You don''t presumably fill the screen with text, do you?

Kind rgds,
-Nik

What do you mean by using the texture to transfer the text to the backbuffer?
Do you mean setting the texture with the text onto a small object, instead of changing the format and blend onto the full screen?
But it''s a pity that the position of the text is not fixed.
A full screen covering is better.