tempo-plotter Changeset - 2e6f48de66b4 · protofusion repositories

Changeset - 2e6f48de66b4

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Hasan Yavuz ÖZDERYA - 10 years ago 2015-08-15 15:24:42
hy@ozderya.net

cache bounding rectangle

2 files changed with 25 insertions and 1 deletions:

framebuffer.cpp

framebuffer.h

0 comments (0 inline, 0 general)

framebuffer.cpp

➞

Show inline comments

@@ @@ -15,24 +15,26 @@ @@
   You should have received a copy of the GNU General Public License
   along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include "framebuffer.h"
 FrameBuffer::FrameBuffer(size_t size)
+{
     _size = size;
     data = new double[_size]();
     headIndex = 0;
     _boundingRect.setCoords(0, 0, size, 0);
+}
 FrameBuffer::~FrameBuffer()
+{
     delete data;
+}
 void FrameBuffer::resize(size_t size)
+{
     int offset = size - _size;
     if (offset == 0) return;
@@ @@ -51,24 +53,27 @@ void FrameBuffer::resize(size_t size) @@
+    {
         for (int i = 0; i < fill_start; i++)
+        {
             newData[i] = 0;
+        }
+    }
     // data is ready, clean and re-point
     delete data;
     data = newData;
     headIndex = 0;
     _size = size;
     // update the bounding rectangle
     _boundingRect.setRight(_size);
+}
 void FrameBuffer::addSamples(double* samples, size_t size)
+{
     unsigned shift = size;
     if (shift < _size)
+    {
         unsigned x = _size - headIndex; // distance of `head` to end
         if (shift <= x) // there is enough room at the end of array
+        {
             for (size_t i = 0; i < shift; i++)
@@ @@ -98,40 +103,57 @@ void FrameBuffer::addSamples(double* sam @@
             headIndex = shift-x;
+        }
+    }
     else // number of new samples equal or bigger than current size
+    {
         int x = shift - _size;
         for (size_t i = 0; i < _size; i++)
+        {
             data[i] = samples[i+x];
+        }
         headIndex = 0;
+    }
     // update bounding rectangle
     double minValue = 0;
     double maxValue = 0;
     for (size_t i = 0; i < _size; i++)
+    {
         if (data[i] > maxValue)
+        {
             maxValue = data[i];
+        }
         else if (data[i] < minValue)
+        {
             minValue = data[i];
+        }
+    }
     _boundingRect.setTop(minValue);
     _boundingRect.setBottom(maxValue);
+}
 void FrameBuffer::clear()
+{
     for (size_t i=0; i < _size; i++) data[i] = 0.;
+}
 size_t FrameBuffer::size() const
+{
     return _size;
+}
 QPointF FrameBuffer::sample(size_t i) const
+{
     return QPointF(i, _sample(i));
+}
 QRectF FrameBuffer::boundingRect() const
+{
-    return qwtBoundingRect(*this);
+    return _boundingRect;
+}
 double FrameBuffer::_sample(size_t i) const
+{
     size_t index = headIndex + i;
     if (index >= _size) index -= _size;
     return data[index];
+}

framebuffer.h

➞

Show inline comments

@@ @@ -35,16 +35,18 @@ public: @@
     void clear(); // fill 0
     // QwtSeriesData implementations
     size_t size() const;
     QPointF sample(size_t i) const;
     QRectF boundingRect() const;
 private:
     size_t _size; // size of `data`
     double* data;
     size_t headIndex; // indicates the actual `0` index of the ring buffer
     QRectF _boundingRect;
     double _sample(size_t i) const;
 };
 #endif // FRAMEBUFFER_H

0 comments (0 inline, 0 general)