VSE: Image transform tools

Add tools for image manipulation in sequencer preview region.

This includes:
- Translate, rotate and resize operators, tools and gizmos
- Origin for image transformation
- Median point and individual origins pivot modes
- Select and Box select operator works in preview
- Image overlay drawing

ref T90156

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D12105

3 files changed, 25 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_scene.c b/source/blender/makesrna/intern/rna_scene.c
index badaaa14aa4..1762b964f8d 100644
--- a/source/blender/makesrna/intern/rna_scene.c
+++ b/source/blender/makesrna/intern/rna_scene.c
@@ -3525,6 +3525,16 @@ static void rna_def_sequencer_tool_settings(BlenderRNA *brna)
       {0, NULL, 0, NULL, NULL},
   };
 
+    static const EnumPropertyItem pivot_points[] = {
+      {V3D_AROUND_CENTER_MEDIAN, "MEDIAN", ICON_PIVOT_MEDIAN, "Median Point", ""},
+      {V3D_AROUND_LOCAL_ORIGINS,
+       "INDIVIDUAL_ORIGINS",
+       ICON_PIVOT_INDIVIDUAL,
+       "Individual Origins",
+       "Pivot around each selected island's own median point"},
+      {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", "");
@@ -3568,6 +3578,10 @@ static void rna_def_sequencer_tool_settings(BlenderRNA *brna)
   prop = RNA_def_property(srna, "overlap_mode", PROP_ENUM, PROP_NONE);
   RNA_def_property_enum_items(prop, scale_overlap_modes);
   RNA_def_property_ui_text(prop, "Overlap Mode", "How to resolve overlap after transformation");
+
+  prop = RNA_def_property(srna, "pivot_point", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, pivot_points);
+  RNA_def_property_ui_text(prop, "Pivot Point", "Rotation or scaling pivot point");
 }
 
 static void rna_def_unified_paint_settings(BlenderRNA *brna)
diff --git a/source/blender/makesrna/intern/rna_sequencer.c b/source/blender/makesrna/intern/rna_sequencer.c
index cd87e4d10c1..b713ffb68b4 100644
--- a/source/blender/makesrna/intern/rna_sequencer.c
+++ b/source/blender/makesrna/intern/rna_sequencer.c
@@ -1442,6 +1442,12 @@ static void rna_def_strip_transform(BlenderRNA *brna)
   RNA_def_property_ui_text(prop, "Rotation", "Rotate around image center");
   RNA_def_property_update(prop, NC_SCENE | ND_SEQUENCER, "rna_SequenceTransform_update");
 
+  prop = RNA_def_property(srna, "origin", PROP_FLOAT, PROP_NONE);
+  RNA_def_property_float_sdna(prop, NULL, "origin");
+  RNA_def_property_ui_text(prop, "Origin", "Origin of image for transformation");
+  RNA_def_property_ui_range(prop, 0, 1, 1, 3);
+  RNA_def_property_update(prop, NC_SCENE | ND_SEQUENCER, "rna_SequenceTransform_update");
+
   RNA_def_struct_path_func(srna, "rna_SequenceTransform_path");
 }
 
diff --git a/source/blender/makesrna/intern/rna_space.c b/source/blender/makesrna/intern/rna_space.c
index 8c331bd1911..70fe2dbc75a 100644
--- a/source/blender/makesrna/intern/rna_space.c
+++ b/source/blender/makesrna/intern/rna_space.c
@@ -5371,6 +5371,11 @@ static void rna_def_space_sequencer_preview_overlay(BlenderRNA *brna)
   RNA_def_property_boolean_sdna(prop, NULL, "flag", SEQ_PREVIEW_SHOW_GPENCIL);
   RNA_def_property_ui_text(prop, "Show Annotation", "Show annotations for this view");
   RNA_def_property_update(prop, NC_SPACE | ND_SPACE_SEQUENCER, NULL);
+
+  prop = RNA_def_property(srna, "show_image_outline", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "flag", SEQ_PREVIEW_SHOW_OUTLINE_SELECTED);
+  RNA_def_property_ui_text(prop, "Image Outline", "");
+  RNA_def_property_update(prop, NC_SPACE | ND_SPACE_SEQUENCER, NULL);
 }
 
 static void rna_def_space_sequencer_timeline_overlay(BlenderRNA *brna)