Issue 2311: improved "Decoding..." progress bar

rtengine/labimage.cc

@@ -0,0 +1,59 @@
+#include "labimage.h"
+#include <memory.h>
+namespace rtengine {
+
+LabImage::LabImage (int w, int h) : fromImage(false), W(w), H(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;
+}
+
+LabImage::~LabImage () {
+
+    if (!fromImage) {
+        delete [] L;
+        delete [] a;
+        delete [] b;
+        delete [] data;
+    }
+}
+
+void LabImage::CopyFrom(LabImage *Img){
+    memcpy(data, Img->data, W*H*3*sizeof(float));
+}
+
+void LabImage::getPipetteData (float &v1, float &v2, float &v3, int posX, int posY, int squareSize) {
+    float accumulator_L = 0.f;
+    float accumulator_a = 0.f;
+    float accumulator_b = 0.f;
+    unsigned long int n = 0;
+    int halfSquare = squareSize/2;
+    for (int iy=posY-halfSquare; iy<posY-halfSquare+squareSize; ++iy) {
+        for (int ix=posX-halfSquare; ix<posX-halfSquare+squareSize; ++ix) {
+            if (ix>=0 && iy>=0 && ix<W && iy<H) {
+                accumulator_L += L[iy][ix];
+                accumulator_a += a[iy][ix];
+                accumulator_b += b[iy][ix];
+                ++n;
+            }
+        }
+    }
+    v1 = n ? accumulator_L/float(n) : 0.f;
+    v2 = n ? accumulator_a/float(n) : 0.f;
+    v3 = n ? accumulator_b/float(n) : 0.f;
+}
+
+}