VSE: Strip drawing improvements

This patch include changes:
- Thicker and clearer selection indication
- Slimmer handles
- More transparent muted strips
- Trim frame number is drawn inside the strip
- Strip text is drawn in upper part of strip
- Color strips now have specific color, with chosen color drawn under strip text
- Transition strip will use color of input strips showing direction of transition
- Selecting effect strip will highlight input strips
- Selecting multicam strips will highlight target channel
- Missing media state is now indicated by a red line drawn on the top part of the strip
- A checkerboard pattern is now drawn on the outsides of the meta range
- Hold still regions are now always drawn if existent, with a darker shade of the strip’s background color

Author: Alessio Monti di Sopra <a.monti>

Reviewed By: ISS

Differential Revision: https://developer.blender.org/D6883

1 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/makesdna/DNA_userdef_types.h b/source/blender/makesdna/DNA_userdef_types.h
index d5ebe4f8778..6a3eaf2ca9a 100644
--- a/source/blender/makesdna/DNA_userdef_types.h
+++ b/source/blender/makesdna/DNA_userdef_types.h
@@ -324,7 +324,7 @@ typedef struct ThemeSpace {
   unsigned char syntaxd[4], syntaxr[4];  // in nodespace used for distort
 
   unsigned char line_numbers[4];
-  char _pad6[3];
+  char _pad6[7];
 
   unsigned char nodeclass_output[4], nodeclass_filter[4];
   unsigned char nodeclass_vector[4], nodeclass_texture[4];
@@ -333,7 +333,8 @@ typedef struct ThemeSpace {
 
   /** For sequence editor. */
   unsigned char movie[4], movieclip[4], mask[4], image[4], scene[4], audio[4];
-  unsigned char effect[4], transition[4], meta[4], text_strip[4];
+  unsigned char effect[4], transition[4], meta[4], text_strip[4], color_strip[4];
+  unsigned char active_strip[4], selected_strip[4];
 
   /** For dopesheet - scale factor for size of keyframes (i.e. height of channels). */
   float keyframe_scale_fac;