Blend factor was used to adjust alpha of background image, which is not
correct. This was done in fdee84fd56 where another change was, that
background alpha is copied into result, which is correct.
Apply blend factor to foreground image alpha channel.
Some effect functions looped over alternating lines, previously with
different factors. Since only one factor is used, code can be
simplified by looping all lines in one for loop.
There should be no functional changes.
2 factor variables were passed to effects, but they were hard coded to
have same value.
Remove duplicate variable from arguments, rename single argument to
`fac`. Inverted factor variables were renamed to `mfac`. Any other
factor related variables are prefixed with `temp_`.
There should be no functional changes.
When scaling down image, users expect to see background, which doesn't
currently happen in VSE. This is because strips use cross blend mode by
default, because alpha over is much slower. Reason is, because any area
of image can be transparent, and therefore it can't have early out
implemented in a way that cross blend mode can.
Flag images rendered by codecs that don't support transparency as fully
opaque and implement a form of early out for alpha over blend mode.
When rendering image stack, 2-input effects are ignored on the
"way down". Alpha over needs rendered overlay image to decide whether it
will use only overlay or background too. Therefore overlay can be
rendered safely before it is used. Image flags can be checked and it can
be freed if needed. Freeing doesn't cause any performance degradation,
because image is always stored in cache.
This feature does not improve blend mode performance. In summary, it
only allowes for having alpha over blend mode on background images
without suffering from lower performance.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D12914
Allow the use of floating-point values for font point sizes, which
allows greater precision and flexibility for text output.
See D8960 for more information, details, and justification.
Differential Revision: https://developer.blender.org/D8960
Reviewed by Campbell Barton
When using downscaled preview size with proxies, transform effect
doesn't compensate for fact, that pixels are effectively larger. There
was compensation for scene render size already.
Use same compensation method as text effect uses for font size.
The clamp added will ensure immediate speed direction change on
changing to/from positive/negative speed factor when using the Speed
effect strip's Multiply mode.
Reviewed By: ISS, sergey
Differential Revision: https://developer.blender.org/D12462
Math implemented in 929d7597b3 was incorrect, but also inconsistent
with previous behavior.
`SEQ_SPEED_STRETCH` should change length only when right handle is
moved. This is now documented in code.
Simplify logic of speed effect frame calculation by using discrete math
where possible. Only `SEQ_SPEED_MULTIPLY` mode with animation requires
frame map to be built. Frame map building was simplified by removing
unused branches.
Functional change: Animating strip in negative range will reverse playback.
I assume this was limitation of previous system, where each frame map item
was limited to be within correct frame range. Now frame map can contain
values that point beyond usable range and they are limited by
`seq_speed_effect_target_frame_get`. This way it is possible to control
playback rate in both directions.
Mostly fixes T89120 apart from offset handling.
Reviewed By: mano-wii
Differential Revision: https://developer.blender.org/D11939
**Drawing Changes:**
- F-curve drawing for Stretch, Multiply, Length and Frame Number.
- Value drawing when no keyframes for Stretch, Length and Frame Numbers.
General view of the new drawing for each speed effect mode:
{F9796642, size=full}
Detail of the horizontal zero (blue) line in the new `Multiply` mode:
{F9798520, size=full}
Nice to have (but I don't know how):
- Auto adjusting of endframe when using Multiply or Boost.
Differential Revision: https://developer.blender.org/D6110
**Changes:**
- New enums correspond to 4 modes: `Stretch`, `Multiply`, `Frame Number` and `Length`.
- "`Multiply Factor`" has been removed;
- Value corresponding to "`use as speed`" enabled is now the value appended to the `Multiply` enum;
- Value corresponding to "`use as speed`" disabled is now the value appended to the `Frame Number` enum;
- Value corresponding to "`Scale to Length`" enabled is now the value appended to the `Length` enum;
- Except `Stretch` each mode has now its respective control values.
Differential Revision: https://developer.blender.org/D11856
When transition effect is placed between 2 adjustment layer strips,
only first adjustment layer was rendered by effect.
Limit timeline_frame range to adjustment strip frame range.
This timeline configuration is technically invalid, because strips
should overlap when using transition effect. This was never restricted
and instead of producing no image, transition effect used first and
last frame of source strip. Many users got used to this "feature" so
I think it make sense to fix this case so it behaves like other strip
types.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D10562
- Position text in center of image
- Increase default font size so it's more visible
- Increase font size limit
- Increase limit for location, so text can be scolled off screen
- Wrap text by default
- Tweak default box and shadow color
- Change text shadow position
- Text box no longer casts shadow
Reviewed By: ISS
Differential Revision: https://developer.blender.org/D10571
Bold and italic fonts can be switched quickly by presing corresponding
button.
Reviewed By: ISS
Differential Revision: https://developer.blender.org/D10542
`seq_effect_speed_get_strip_content_length()` checked only for number
of inputs of target strip, even if it's not an effect.
Only effects are treated in different way, so check for type as well.
Broken by 93c10797dc
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D10356
Generator strips with zero inputs have their length set to 1 pernamently.
In some cases it is useful to use speed effect on these strips because they
can be animated. This can be done by using their length as is on timeline as
content length.
This is very simplified and temporary solution, as cutting these strips won't
give expected results. Lot of code relies on length of these strips being fixed
to 1, resolving this properly should be done by T59540.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D10026
Remove DNA headers, using forward declarations where possible.
Also removed duplicate header, header including it's self
and unnecessary inclusion of libc system headers from BKE header.
Use either scene render size or fixed preview scale factor.
Previously scene render size was used as baseline value for text size
correction. This is incorrect.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D9563
Move most functions into separate files.
File sequencer.c is reserved for alloc, free and duplicating functions.
There should be no functional changes.
This adds a Box option to the Text strip's style properties, plus related Box Margin value:
{F9208309}
When enabled the text is placed on top of a solid-filled rectangle of a chosen color, as shown below:
{F9208324}
When the box option is disabled the text strip works the same as it does now. When the box option is enabled the meaning of the Shadow option changes to provide a drop-shadow on the rectangle (and not on the text itself). The latter made more sense to me.
The box margin is specified as a fraction of the image width. The offset of the drop-down box shadow is fixed to a specific fraction of the image width as well.
I tested this feature on a movie of a couple of minutes containing dozens of text strips (all with box background), edge cases like multi-line strings and text overlapping the image edges.
Reviewed By: ISS
Differential Revision: https://developer.blender.org/D9468
Variables renaned:
- cfra -> timeline_frame
- nr -> frame index
- cfra_over -> overlap_frame
Function seq_give_stripelem_index was renamed to seq_give_frame_index.
Replace BKE_sequencer wirh SEQ_render or SEQ_proxy prefixes.
In cases where function is very generic, only SEQ prefix is used.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D9439
Move functions closely related to rendering images and proxies into
render.c and proxy.c files. render.h and proxy.h are created for
functions used internally.
There should be no functional changes.
Intern definitions are moved to sequencer/intern/sequencer.h
BKE_sequencer.h was also cleaned up a bit to make sure that functions
and structs are in correct category.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D9259
This is first step of refactoring task T77580.
Next step will be breaking up files into smaller ones.
Reviewed By: sergey, brecht
Differential Revision: https://developer.blender.org/D8492
