Thijs Koerselman

I can't get mipmapping to work on my computer. I'm using power-of-two

textures (1024x1024), but setting mipmap or filter settings just gives me

@mipmap linear or nearest generates the following error: "jit.gl.texture:

setting texture filter mode.: GL Error: Invalid operation."

I guess bilinear and trilinear are not supported by my videocard because I

get: "jit.gl.texture: invalid filter mode bilinear".

I'm animating photos and the quality of the pictures is important. Scaling

from thumbs to fullscreen and back without interpolation looks really bad. I

hope someone knows a fix / workaround for this.

I'm using jitter 1.5.2 + nvidea go6800 (forceware 84.25)

I can't get mipmapping to work on my computer. I'm using power-of-two
textures (1024x1024), but setting mipmap or filter settings just gives me
errors.

@mipmap linear or nearest generates the following error: "jit.gl.texture:
setting texture filter mode.: GL Error: Invalid operation."

I guess bilinear and trilinear are not supported by my videocard because I
get: "jit.gl.texture: invalid filter mode bilinear".

I'm animating photos and the quality of the pictures is important. Scaling
from thumbs to fullscreen and back without interpolation looks really bad. I
hope someone knows a fix / workaround for this.

texture-mipmap

Unfortunately, the filter attribute of jit.gl.texture is broken in 

1.5.2 and should be fixed in 1.5.3. I haven't performed testing of 

the mipmap case, but we can do this to verify. Standard bilinear 

texture filtering is the default (same as linear), however it doesn't 

For image scaling, one could write a decent quality texture scaling 

shader which uses something like a lancszos or mitchell filter for 

texture sampling. Perhaps we'll find time to make one for the jitter 

1.5.3 release, but one quick workaround might be to use one of the 

blurring shaders where blur width is increased as the scale is 

Unfortunately, the filter attribute of jit.gl.texture is broken in  
1.5.2 and should be fixed in 1.5.3. I haven't performed testing of  
the mipmap case, but we can do this to verify. Standard bilinear  
texture filtering is the default (same as linear), however it doesn't  
do a very good job at downsampling.

For image scaling, one could write a decent quality texture scaling  
shader which uses something like a lancszos or mitchell filter for  
texture sampling. Perhaps we'll find time to make one for the jitter  
1.5.3 release, but one quick workaround might be to use one of the  
blurring shaders where blur width is increased as the scale is  
decreased.

That's too bad. I'll see if I have the time to get the shader thing working

for now. I just ran into a bigger problem... patch is on the way.

That's too bad. I'll see if I have the time to get the shader thing working
for now. I just ran into a bigger problem... patch is on the way.

texture mipmap