Commit Graph

5 Commits

Author SHA1 Message Date
Emmanuele Bassi
de32ba1ddf interactive/image-box: Clarify the label contents 2012-03-16 15:05:42 +00:00
Emmanuele Bassi
ae554a5061 Rename 'bilinear' scaling filter to 'trilinear'
Yes, it's not really the proper GL name for a linear-on-every-axis of a
texture plus linear-between-mipmap-levels minification filter, but it
has three redeeming qualities as a name:

  - LINEAR_MIPMAP_LINEAR sucks, as it introduces GL concepts like
    mipmaps in the API naming, while we're trying to avoid that;
  - people using GL already know what 'trilinear' means in this context
    without going all Khronos on their asses;
  - we're using 2D textures anyway, so 'linear on two axes and linear
    between mipmap levels' can be effectively approximated to
    'trilinear'.

I mean, if even the OpenGL official wiki says:

  Unfortunately, what most people think of as "trilinear" is not linear
  filtering of a 3D texture, but what in OpenGL terms is GL_LINEAR mag
  filter and GL_LINEAR_MIPMAP_LINEAR in the min filter in a 2D texture.
  That is, it is bilinear filtering of each appropriate mipmap level,
  and doing a third linear filter between the adjacent mipmap levels.
  Hence the term "trilinear".
                -- http://www.opengl.org/wiki/Texture

then the horse has already been flogged to death, and I don't intend to
be accused of necrophilia and sadism by flogging it some more.

Prior art: every single GL tutorial in the history of ever;
CoreAnimation's scaling filter enumerations.

If people want to start using 1D or 3D textures they they are probably
going to be using Cogl API directly, and that has the GL naming scheme
for minification and magnification filters anyway.
2012-03-16 12:33:40 +00:00
Emmanuele Bassi
90784a025a interactive/image-box: Remove unneeded stuff 2012-03-16 12:33:39 +00:00
Emmanuele Bassi
9845ce9d89 actor: Fix RESIZE_ASPECT mode for the content box 2012-03-16 12:33:38 +00:00
Emmanuele Bassi
1b4bfb04e5 interactive/image-box: Add a pure Image test, suitable for docs 2012-03-16 12:33:38 +00:00