Painting: migrated curve mask generation to CPP.

Curve mask generation is done during 2d texture painting. There are some
performance issues in this part of the code. Before addressing those we
move the code to CPP.

1 files changed, 39 insertions, 2 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_intern.h b/source/blender/editors/sculpt_paint/paint_intern.h
index 7341d984c91..13ae2b34860 100644
--- a/source/blender/editors/sculpt_paint/paint_intern.h
+++ b/source/blender/editors/sculpt_paint/paint_intern.h
@@ -23,6 +23,13 @@
 
 #pragma once
 
+#include "BKE_paint.h"
+#include "DNA_scene_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ARegion;
 struct Brush;
 struct ColorManagedDisplay;
@@ -43,8 +50,6 @@ struct wmEvent;
 struct wmKeyConfig;
 struct wmOperator;
 struct wmOperatorType;
-enum ePaintMode;
-enum ePaintSymmetryFlags;
 
 typedef struct CoNo {
   float co[3];
@@ -245,6 +250,33 @@ void PAINT_OT_add_texture_paint_slot(struct wmOperatorType *ot);
 void PAINT_OT_image_paint(struct wmOperatorType *ot);
 void PAINT_OT_add_simple_uvs(struct wmOperatorType *ot);
 
+/* paint_image_2d_curve_mask.cc */
+/**
+ * \brief Caching structure for curve mask.
+ *
+ * When 2d painting images the curve mask is used as an input.
+ */
+typedef struct CurveMaskCache {
+  /**
+   * \brief Size in bytes of the curve_mask field.
+   *
+   * Used to determine if the curve_mask needs to be re-allocated.
+   */
+  size_t curve_mask_size;
+
+  /**
+   * \brief Curve mask that can be passed as curve_mask parameter when.
+   */
+  ushort *curve_mask;
+} CurveMaskCache;
+
+void paint_curve_mask_cache_free_data(CurveMaskCache *curve_mask_cache);
+void paint_curve_mask_cache_update(CurveMaskCache *curve_mask_cache,
+                                   const struct Brush *brush,
+                                   const int diameter,
+                                   const float radius,
+                                   const float cursor_position[2]);
+
 /* sculpt_uv.c */
 void SCULPT_OT_uv_sculpt_stroke(struct wmOperatorType *ot);
 
@@ -366,3 +398,8 @@ void paint_delete_blur_kernel(BlurKernel *);
 
 /* paint curve defines */
 #define PAINT_CURVE_NUM_SEGMENTS 40
+
+#ifdef __cplusplus
+}
+#endif
+