I am trying to use fragment shaders to convert 2x2 image to 2x4 image which is basically I am trying to convert an image to double sized vertical only (not horizontal, atleast not yet)
Even though I have specified the texture parameters as GL_LINEAR for min and mag I am getting the final image sampled as GL_NEAREST.
I am not using any mipmaps
eg on how the double vertical should be sampled is as below
Original 2x2 Image
| a | b |
| c | d |
Final 2x4 image should look like
| a | b |
| ac | bd |
| c | d |
| c~ | d~ |
but the final 2x4 image looks like (which is wrong and I believe its doing GL_NEAREST)
| a | b |
| a | b |
| c | d |
| c | d |
Let me know what I am doing wrong, apart from setting the GL_LINEAR is there anything else I am missing.
Appreciate your reply.
thx
Chidu