VSE: Add filter method to strip transform

Previously, nearest interpolation filter was used for preview, because
it offered good performance and bilinear was used for rendering. This
is not always desirable behavior, so filter method can now be chosen by
user. Chosen method will be used for preview and for rendering.

Reviewed By: ISS

Differential Revision: https://developer.blender.org/D12807

1 files changed, 9 insertions, 2 deletions

diff --git a/source/blender/sequencer/intern/render.c b/source/blender/sequencer/intern/render.c
index 482425e70d3..a6c627e5ce7 100644
--- a/source/blender/sequencer/intern/render.c
+++ b/source/blender/sequencer/intern/render.c
@@ -524,8 +524,15 @@ static void sequencer_preprocess_transform_crop(
   const float crop_scale_factor = do_scale_to_render_size ? preview_scale_factor : 1.0f;
   sequencer_image_crop_init(seq, in, crop_scale_factor, &source_crop);
 
-  const eIMBInterpolationFilterMode filter = context->for_render ? IMB_FILTER_BILINEAR :
-                                                                   IMB_FILTER_NEAREST;
+  eIMBInterpolationFilterMode filter;
+  const StripTransform *transform = seq->strip->transform;
+  if (transform->filter == SEQ_TRANSFORM_FILTER_NEAREST) {
+    filter = IMB_FILTER_NEAREST;
+  }
+  else {
+    filter = IMB_FILTER_BILINEAR;
+  }
+
   IMB_transform(in, out, IMB_TRANSFORM_MODE_CROP_SRC, filter, transform_matrix, &source_crop);
 
   if (!seq_image_transform_transparency_gained(context, seq)) {