Mask node: create a copy of layers to be rasterized in initExecution

This creates a list of splines to be rasterized in nitExecution which
is being called from main thread. This should resolve possible threading
issues discovered in tomato branch.

source/blender/blenkernel/BKE_mask.h

@@ -27,6 +27,7 @@
 #ifndef __BKE_MASK_H__
 #define __BKE_MASK_H__
 
+struct ListBase;
 struct Main;
 struct Mask;
 struct MaskParent;
@@ -50,12 +51,16 @@ void BKE_mask_layer_remove(struct Mask *mask, struct MaskLayer *masklay);
 
 void BKE_mask_layer_free_shapes(struct MaskLayer *masklay);
 void BKE_mask_layer_free(struct MaskLayer *masklay);
+void BKE_mask_layer_free_list(struct ListBase *masklayers);
 void BKE_mask_spline_free(struct MaskSpline *spline);
 struct MaskSpline *BKE_mask_spline_copy(struct MaskSpline *spline);
 void BKE_mask_point_free(struct MaskSplinePoint *point);
 
 void BKE_mask_layer_unique_name(struct Mask *mask, struct MaskLayer *masklay);
 
+struct MaskLayer *BKE_mask_layer_copy(struct MaskLayer *layer);
+void BKE_mask_layer_copy_list(struct ListBase *masklayers_new, struct ListBase *masklayers);
+
 /* splines */
 struct MaskSpline *BKE_mask_spline_add(struct MaskLayer *masklay);
 
@@ -170,6 +175,11 @@ void BKE_mask_layer_shape_changed_remove(struct MaskLayer *masklay, int index, i
 
 /* rasterization */
 int BKE_mask_get_duration(struct Mask *mask);
+
+void BKE_mask_rasterize_layers(struct ListBase *masklayers, int width, int height, float *buffer,
+                               const short do_aspect_correct, const short do_mask_aa,
+                               const short do_feather);
+
 void BKE_mask_rasterize(struct Mask *mask, int width, int height, float *buffer,
                         const short do_aspect_correct, const short do_mask_aa,
                         const short do_feather);

source/blender/blenkernel/intern/mask.c

@@ -188,6 +188,41 @@ void BKE_mask_layer_unique_name(Mask *mask, MaskLayer *masklay)
 	BLI_uniquename(&mask->masklayers, masklay, "MaskLayer", '.', offsetof(MaskLayer, name), sizeof(masklay->name));
 }
 
+MaskLayer *BKE_mask_layer_copy(MaskLayer *layer)
+{
+	MaskLayer *layer_new;
+	MaskSpline *spline;
+
+	layer_new = MEM_callocN(sizeof(MaskLayer), "new mask layer");
+
+	BLI_strncpy(layer_new->name, layer->name, sizeof(layer_new->name));
+
+	layer_new->alpha = layer->alpha;
+	layer_new->blend = layer->blend;
+	layer_new->blend_flag = layer->blend_flag;
+	layer_new->flag = layer->flag;
+	layer_new->restrictflag = layer->restrictflag;
+
+	for (spline = layer->splines.first; spline; spline = spline->next) {
+		MaskSpline *spline_new = BKE_mask_spline_copy(spline);
+
+		BLI_addtail(&layer_new->splines, spline_new);
+	}
+
+	return layer_new;
+}
+
+void BKE_mask_layer_copy_list(ListBase *masklayers_new, ListBase *masklayers)
+{
+	MaskLayer *layer;
+
+	for (layer = masklayers->first; layer; layer = layer->next) {
+		MaskLayer *layer_new = BKE_mask_layer_copy(layer);
+
+		BLI_addtail(masklayers_new, layer_new);
+	}
+}
+
 /* splines */
 
 MaskSpline *BKE_mask_spline_add(MaskLayer *masklay)
@@ -988,21 +1023,34 @@ void BKE_mask_spline_free(MaskSpline *spline)
 	MEM_freeN(spline);
 }
 
+static MaskSplinePoint *mask_spline_points_copy(MaskSplinePoint *points, int tot_point)
+{
+	MaskSplinePoint *npoints;
+	int i;
+
+	npoints = MEM_dupallocN(points);
+
+	for (i = 0; i < tot_point; i++) {
+		MaskSplinePoint *point = &npoints[i];
+
+		if (point->uw)
+			point->uw = MEM_dupallocN(point->uw);
+	}
+
+	return npoints;
+}
+
 MaskSpline *BKE_mask_spline_copy(MaskSpline *spline)
 {
 	MaskSpline *nspline = MEM_callocN(sizeof(MaskSpline), "new spline");
-	int i;
 
 	*nspline = *spline;
 
 	nspline->points_deform = NULL;
-	nspline->points = MEM_dupallocN(nspline->points);
+	nspline->points = mask_spline_points_copy(spline->points, spline->tot_point);
 
-	for (i = 0; i < nspline->tot_point; i++) {
-		MaskSplinePoint *point = &nspline->points[i];
-
-		if (point->uw)
-			point->uw = MEM_dupallocN(point->uw);
+	if (spline->points_deform) {
+		nspline->points_deform = mask_spline_points_copy(spline->points_deform, spline->tot_point);
 	}
 
 	return nspline;
@@ -1068,20 +1116,25 @@ void BKE_mask_layer_free(MaskLayer *masklay)
 	MEM_freeN(masklay);
 }
 
-void BKE_mask_free(Mask *mask)
+void BKE_mask_layer_free_list(ListBase *masklayers)
 {
-	MaskLayer *masklay = mask->masklayers.first;
+	MaskLayer *masklay = masklayers->first;
 
 	while (masklay) {
-		MaskLayer *next_masklay = masklay->next;
+		MaskLayer *masklay_next = masklay->next;
 
-		BLI_remlink(&mask->masklayers, masklay);
+		BLI_remlink(masklayers, masklay);
 		BKE_mask_layer_free(masklay);
 
-		masklay = next_masklay;
+		masklay = masklay_next;
 	}
 }
 
+void BKE_mask_free(Mask *mask)
+{
+	BKE_mask_layer_free_list(&mask->masklayers);
+}
+
 void BKE_mask_unlink(Main *bmain, Mask *mask)
 {
 	bScreen *scr;
@@ -2093,9 +2146,9 @@ int BKE_mask_get_duration(Mask *mask)
 }
 
 /* rasterization */
-void BKE_mask_rasterize(Mask *mask, int width, int height, float *buffer,
-                        const short do_aspect_correct, const short do_mask_aa,
-                        const short do_feather)
+void BKE_mask_rasterize_layers(ListBase *masklayers, int width, int height, float *buffer,
+                               const short do_aspect_correct, const short do_mask_aa,
+                               const short do_feather)
 {
 	MaskLayer *masklay;
 
@@ -2103,7 +2156,7 @@ void BKE_mask_rasterize(Mask *mask, int width, int height, float *buffer,
 	const int buffer_size = width * height;
 	float *buffer_tmp = MEM_mallocN(sizeof(float) * buffer_size, __func__);
 
-	for (masklay = mask->masklayers.first; masklay; masklay = masklay->next) {
+	for (masklay = masklayers->first; masklay; masklay = masklay->next) {
 		MaskSpline *spline;
 		float alpha;
 
@@ -2226,3 +2279,10 @@ void BKE_mask_rasterize(Mask *mask, int width, int height, float *buffer,
 
 	MEM_freeN(buffer_tmp);
 }
+
+void BKE_mask_rasterize(Mask *mask, int width, int height, float *buffer,
+                        const short do_aspect_correct, const short do_mask_aa,
+                        const short do_feather)
+{
+	BKE_mask_rasterize_layers(&mask->masklayers, width, height, buffer, do_aspect_correct, do_mask_aa, do_feather);
+}

source/blender/compositor/operations/COM_MaskOperation.cpp

@@ -49,11 +49,19 @@ MaskOperation::MaskOperation() : NodeOperation()
 void MaskOperation::initExecution()
 {
 	initMutex();
+
 	this->m_rasterizedMask = NULL;
+	this->m_maskLayers.first = this->m_maskLayers.last = NULL;
+
+	if (this->m_mask) {
+		BKE_mask_layer_copy_list(&this->m_maskLayers, &this->m_mask->masklayers);
+	}
 }
 
 void MaskOperation::deinitExecution()
 {
+	BKE_mask_layer_free_list(&this->m_maskLayers);
+
 	if (this->m_rasterizedMask) {
 		MEM_freeN(this->m_rasterizedMask);
 		this->m_rasterizedMask = NULL;
@@ -75,7 +83,10 @@ void *MaskOperation::initializeTileData(rcti *rect, MemoryBuffer **memoryBuffers
 		float *buffer;
 
 		buffer = (float *)MEM_callocN(sizeof(float) * width * height, "rasterized mask");
-		BKE_mask_rasterize(this->m_mask, width, height, buffer, TRUE, this->m_do_smooth, this->m_do_feather);
+
+		BKE_mask_rasterize_layers(&this->m_maskLayers, width, height, buffer, TRUE,
+		                          this->m_do_smooth, this->m_do_feather);
+
 		if (this->m_do_smooth) {
 			PLX_antialias_buffer(buffer, width, height);
 		}

source/blender/compositor/operations/COM_MaskOperation.h

@@ -43,6 +43,7 @@ protected:
 	bool m_do_smooth;
 	bool m_do_feather;
 	float *m_rasterizedMask;
+	ListBase m_maskLayers;
 
 	/**
 	 * Determine the output resolution. The resolution is retrieved from the Renderer