Sculpt: Support pen pressure modulation in Paint Brush properties

This allows to use pen pressure modulation in hardness, wet mix, wet
persistence, flow and density, as well as inverting the modulation (more
pressure, less density...). With this, it is possible to create brushes
that mix paint or apply a new color based on the pressure.

Reviewed By: sergey, campbellbarton

Differential Revision: https://developer.blender.org/D8267

1 files changed, 15 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_brush_types.h b/source/blender/makesdna/DNA_brush_types.h
index 0ad249ef2cd..76a172d6fda 100644
--- a/source/blender/makesdna/DNA_brush_types.h
+++ b/source/blender/makesdna/DNA_brush_types.h
@@ -388,6 +388,19 @@ typedef enum eAutomasking_flag {
   BRUSH_AUTOMASKING_BOUNDARY_FACE_SETS = (1 << 3),
 } eAutomasking_flag;
 
+typedef enum ePaintBrush_flag {
+  BRUSH_PAINT_HARDNESS_PRESSURE = (1 << 0),
+  BRUSH_PAINT_HARDNESS_PRESSURE_INVERT = (1 << 1),
+  BRUSH_PAINT_FLOW_PRESSURE = (1 << 2),
+  BRUSH_PAINT_FLOW_PRESSURE_INVERT = (1 << 3),
+  BRUSH_PAINT_WET_MIX_PRESSURE = (1 << 4),
+  BRUSH_PAINT_WET_MIX_PRESSURE_INVERT = (1 << 5),
+  BRUSH_PAINT_WET_PERSISTENCE_PRESSURE = (1 << 6),
+  BRUSH_PAINT_WET_PERSISTENCE_PRESSURE_INVERT = (1 << 7),
+  BRUSH_PAINT_DENSITY_PRESSURE = (1 << 8),
+  BRUSH_PAINT_DENSITY_PRESSURE_INVERT = (1 << 9),
+} ePaintBrush_flag;
+
 typedef struct Brush {
   ID id;
 
@@ -454,6 +467,7 @@ typedef struct Brush {
   float wet_persistence;
   /** Density */
   float density;
+  int paint_flags;
 
   /** Tip Shape */
   /* Factor that controls the shape of the brush tip by rounding the corners of a square. */
@@ -480,7 +494,7 @@ typedef struct Brush {
   /** Source for fill tool color gradient application. */
   char gradient_fill_mode;
 
-  char _pad0[1];
+  char _pad0[5];
 
   /** Projection shape (sphere, circle). */
   char falloff_shape;