Reduce peak memory usage of queue processing, Issue 2527

rtengine/labimage.h

@@ -24,7 +24,23 @@ namespace rtengine {
 class LabImage {
 private:
 	bool fromImage;
+	void allocLab(int w, int h) {
+	    L = new float*[H];
+		a = new float*[H];
+		b = new float*[H];
 
+		data = new float [W*H*3];
+		float * index = data;
+		for (int i=0; i<H; i++)
+			L[i] = index + i*W;
+		index+=W*H;
+		for (int i=0; i<H; i++)
+			a[i] = index + i*W;
+		index+=W*H;
+
+		for (int i=0; i<H; i++)
+			b[i] = index + i*W;
+	};
 public:
 	int W, H;
 	float * data;
@@ -38,6 +54,16 @@ public:
 	//Copies image data in Img into this instance.
 	void CopyFrom(LabImage *Img);
 	void getPipetteData (float &L, float &a, float &b, int posX, int posY, int squareSize);
+	void deleteLab( ) {
+		if (!fromImage) {
+			delete [] L;
+			delete [] a;
+			delete [] b;
+			delete [] data;
+		}
+	}
+	void reallocLab( ) { allocLab(W,H); };
+
 };
 
 }