Fix #31093: Brush's "Paint curve presets" in Image paint in UV\Image Editor doesn't work if weight paint mode is active

Some operators like curve presets, color sample and some more were using object's
mode to distinguish in which mode user is currently painting. Such approach fails
in cases when there's paint mode active in 3D viewport and Image Editor.

Changed logic here to use some context's state like active space which helps
distinguishing current paint mode more accurate.

Ported all areas which uses paint_get_active() to new paint_get_active_from_context().
There're still some calls to paint_get_active(), but that shouldn't be harmful due
to that places indeed have object's mode as priority when getting paint mode.

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_intern.h b/source/blender/editors/sculpt_paint/paint_intern.h
index de149bf2806..794e7755636 100644
--- a/source/blender/editors/sculpt_paint/paint_intern.h
+++ b/source/blender/editors/sculpt_paint/paint_intern.h
@@ -137,7 +137,7 @@ float paint_get_tex_pixel(struct Brush *br, float u, float v);
 int imapaint_pick_face(struct ViewContext *vc, const int mval[2], unsigned int *index, unsigned int totface);
 void imapaint_pick_uv(struct Scene *scene, struct Object *ob, unsigned int faceindex, const int xy[2], float uv[2]);
 
-void paint_sample_color(struct Scene *scene, struct ARegion *ar, int x, int y);
+void paint_sample_color(const struct bContext *C, struct ARegion *ar, int x, int y);
 void BRUSH_OT_curve_preset(struct wmOperatorType *ot);
 
 void PAINT_OT_face_select_linked(struct wmOperatorType *ot);