VSE: Improve motion-picture workflow

This commit resolves problem introduced in e1665c3d3190 - it was
difficult to import media at their original resolution.
This is done by using original resolution as reference for scale.

All crop and strip transform values and their animation is converted
form old files.

To make both workflows easy to use, sequencer tool settings have been
created with preset for preffered scaling method. This setting is in
sequencer timeline header and add image or movie strip operator
properties.

Two new operators have been added:
`sequencer.strip_transform_fit` operator with 3 options: Scale To Fit,
Scale to Fill and Stretch To Fill.
Operator can fail if strip image or video is not loaded currently, this
case should be either sanitized or data loaded on demand.

`sequencer.strip_transform_clear` operator with 4 options:
Clear position, scale, rotation and all (previous 3 options combined).

Reviewed By: sergey, fsiddi

Differential Revision: https://developer.blender.org/D9582

1 files changed, 38 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_scene.c b/source/blender/makesrna/intern/rna_scene.c
index e149bb4ecad..7cae88d292b 100644
--- a/source/blender/makesrna/intern/rna_scene.c
+++ b/source/blender/makesrna/intern/rna_scene.c
@@ -2200,6 +2200,11 @@ static char *rna_CurvePaintSettings_path(PointerRNA *UNUSED(ptr))
   return BLI_strdup("tool_settings.curve_paint_settings");
 }
 
+static char *rna_SequencerToolSettings_path(PointerRNA *UNUSED(ptr))
+{
+  return BLI_strdup("tool_settings.sequencer_tool_settings");
+}
+
 /* generic function to recalc geometry */
 static void rna_EditMesh_update(bContext *C, PointerRNA *UNUSED(ptr))
 {
@@ -3584,6 +3589,38 @@ static void rna_def_tool_settings(BlenderRNA *brna)
   RNA_def_property_pointer_sdna(prop, NULL, "custom_bevel_profile_preset");
   RNA_def_property_struct_type(prop, "CurveProfile");
   RNA_def_property_ui_text(prop, "Curve Profile Widget", "Used for defining a profile's path");
+
+  /* Sequencer tool settings */
+  prop = RNA_def_property(srna, "sequencer_tool_settings", PROP_POINTER, PROP_NONE);
+  RNA_def_property_flag(prop, PROP_NEVER_NULL);
+  RNA_def_property_struct_type(prop, "SequencerToolSettings");
+  RNA_def_property_ui_text(prop, "Sequencer Tool Settings", NULL);
+}
+
+static void rna_def_sequencer_tool_settings(BlenderRNA *brna)
+{
+  StructRNA *srna;
+  PropertyRNA *prop;
+
+  static const EnumPropertyItem scale_fit_methods[] = {
+      {SEQ_SCALE_TO_FIT, "FIT", 0, "Scale to Fit", "Scale image to fit within the canvas"},
+      {SEQ_SCALE_TO_FILL, "FILL", 0, "Scale to Fill", "Scale image to completely fill the canvas"},
+      {SEQ_STRETCH_TO_FILL, "STRETCH", 0, "Stretch to Fill", "Stretch image to fill the canvas"},
+      {SEQ_USE_ORIGINAL_SIZE,
+       "ORIGINAL",
+       0,
+       "Use Original Size",
+       "Keep image at its original size"},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  srna = RNA_def_struct(brna, "SequencerToolSettings", NULL);
+  RNA_def_struct_path_func(srna, "rna_SequencerToolSettings_path");
+  RNA_def_struct_ui_text(srna, "Sequencer Tool Settings", "");
+
+  prop = RNA_def_property(srna, "fit_method", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, scale_fit_methods);
+  RNA_def_property_ui_text(prop, "Fit Method", "Scale fit method");
 }
 
 static void rna_def_unified_paint_settings(BlenderRNA *brna)
@@ -7968,6 +8005,7 @@ void RNA_def_scene(BlenderRNA *brna)
   rna_def_gpencil_interpolate(brna);
   rna_def_unified_paint_settings(brna);
   rna_def_curve_paint_settings(brna);
+  rna_def_sequencer_tool_settings(brna);
   rna_def_statvis(brna);
   rna_def_unit_settings(brna);
   rna_def_scene_image_format_data(brna);