This assumptions are now made:
- Internally float buffers are always linear alpha-premul colors
- Readers should worry about delivering float buffers with that
assumptions.
- There's an input image setting to say whether it's stored with
straight/premul alpha on the disk.
- Byte buffers are now assumed have straight alpha, readers should
deliver straight alpha.
Some implementation details:
- Removed scene's color unpremultiply setting, which was very
much confusing and was wrong for default settings.
Now all renderers assumes to deliver premultiplied alpha.
- IMB_buffer_byte_from_float will now linearize alpha when
converting from buffer.
- Sequencer's effects were changed to assume bytes have got
straight alpha. Most of effects will work with bytes still,
however for glow it was more tricky to avoid data loss, so
there's a commented out glow implementation which converts
byte buffer to floats first, operates on floats and returns
bytes back. It's slower and not sure if it should actually
be used -- who're using glow on alpha anyway?
- Sequencer modifiers should also be working nice with straight
bytes now.
- GLSL preview will predivide float textures to make nice shading,
shading with byte textures worked nice (GLSL was assuming straight
alpha).
- Blender Internal will set alpha=1 to the whole sky. The same
happens in Cycles and there's no way to avoid this -- sky is
neither straight nor premul and doesn't fit color pipeline well.
- Straight alpha mode for render result was also eliminated.
- Conversion to correct alpha need to be done before linearizing
float buffer.
- TIFF will now load and save files with proper alpha mode setting
in file meta data header.
- Remove Use Alpha from texture mapping and replaced with image
datablock setting.
Behaves much more predictable and clear from code point of view
and solves possible regressions when non-premultiplied images were
used as textures with ignoring alpha channel.
now blenlib/BLI doesn't depend on any blenkern/BKE functions,
there are still some bad level includes but these are only to access G.background and the blender version define.
Documentation & Test blend files:
------------------
http://wiki.blender.org/index.php/User:MiikaH/GSoC-2012-Smoke-Simulator-Improvements
Credits:
------------------
Miika Hamalainen (MiikaH): Student / Main programmer
Daniel Genrich (Genscher): Mentor / Programmer of merged patches from Smoke2 branch
Google: For Google Summer of Code 2012
* Remove all code for Texture and Sequencer plugin system, this never worked in 2.5x / 2.6x and is therefore not needed anymore.
* DNA structures are kept, all read/writefile code is gone.
Quick shows over 2x speedup in my tests, will give bigger speedup with more vertex groups.
If you happen to have vertices with no faces using them - vertex colors will be calculated unnecessarily, but this isnt a common use case for weight paint mode.
Warning!
Angles in nodes have just been moved to consistant Radians values (ANGLE subtype of RNA Float property). You will still see them as degrees in the GUI, though, unless you chose otherwise in Scene properties, Units panel.
Conversion from degrees to radians for old files is obviously done at loading time, but if you use a mixed pipeline of trunk and releases, be carefull!
Loading a 2.60.4 file (or higher) into any previous version of Blender, your angles in nodes will have odd values (well, radians interpreted as degrees)!
And if you save such file in a pre-2.60.4 version, the angle node values will be converted again when loaded in Blender 2.60.4 or higher...
This affects following nodes:
* Compo: Rotate, Defocus, ChromaMatte, Glare and DirectionalBlur
* Shader: Mapping
And all future code using the TexMapping struct’s rotation part (its rot memember is now in radians).
ColorMapping struct for color manipulation of textures. These will be the
standard built-in texture node options for manipulating the incoming texture
coordinate and outgoing color.
- remove unneeded type check from convert grease pencil operator.
- correct some error prints & use __func__.
- make copy_libblock take an ID* argument rather than void*.
so path manipulation functions dont run multiple times on the same path in the case of sequence strips where the one directory is used as the base for many images.
Files created in blender before this revision should be rendered in
exactly the same way they used to render before.
Patch by Morten Mikkelsen, finished by Ton and me.
This would previously break because begin/end functions for each tree type still have some checks of the ntree->execdata pointer in them, despite the intended use of execdata instances instead of trees themselves for execution data storage. This is an artifact of the old execution system that required these checks to be made in the functions to avoid multiple execution of top-level trees. Now these functions take an additional argument, so group nodes can prevent them from setting and checking the nodetree->execdata pointers.
This branch adds mostly organizational improvements to the node system by renaming the node folders and files. A couple of internal features have been added too.
Detailed information can be found on the wiki page:
http://wiki.blender.org/index.php/User:Phonybone/Particles2010
in a particular setup with two nested material nodes. Material active texture
was looking also recursively into material node, but this was already done
outside of this function.
* Noise is now considered an animated texture as it changes with every frame
* Converted a few places in particles code to use the particle system's own random table instead of BLI_frand.
