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, 4 insertions, 4 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_utils.c b/source/blender/editors/sculpt_paint/paint_utils.c
index 4c374674c9a..082e40f8e4c 100644
--- a/source/blender/editors/sculpt_paint/paint_utils.c
+++ b/source/blender/editors/sculpt_paint/paint_utils.c
@@ -333,9 +333,9 @@ int imapaint_pick_face(ViewContext *vc, const int mval[2], unsigned int *index,
 }
 
 /* used for both 3d view and image window */
-void paint_sample_color(Scene *scene, ARegion *ar, int x, int y)    /* frontbuf */
+void paint_sample_color(const bContext *C, ARegion *ar, int x, int y)    /* frontbuf */
 {
-	Brush *br = paint_brush(paint_get_active(scene));
+	Brush *br = paint_brush(paint_get_active_from_context(C));
 	unsigned int col;
 	char *cp;
 
@@ -357,7 +357,7 @@ void paint_sample_color(Scene *scene, ARegion *ar, int x, int y)    /* frontbuf
 
 static int brush_curve_preset_exec(bContext *C, wmOperator *op)
 {
-	Brush *br = paint_brush(paint_get_active(CTX_data_scene(C)));
+	Brush *br = paint_brush(paint_get_active_from_context(C));
 	BKE_brush_curve_preset(br, RNA_enum_get(op->ptr, "shape"));
 
 	return OPERATOR_FINISHED;
@@ -365,7 +365,7 @@ static int brush_curve_preset_exec(bContext *C, wmOperator *op)
 
 static int brush_curve_preset_poll(bContext *C)
 {
-	Brush *br = paint_brush(paint_get_active(CTX_data_scene(C)));
+	Brush *br = paint_brush(paint_get_active_from_context(C));
 
 	return br && br->curve;
 }