Initial rendering of traces

[pulseview.git] / logicsignal.cpp

diff --git a/logicsignal.cpp b/logicsignal.cpp
index 8f984ea7ab4616c5d054cbedd01f09a5e88dfe76..1587bddd473002d4264d47abafd118d5c3c0cfd2 100644 (file)
--- a/logicsignal.cpp
+++ b/logicsignal.cpp
@@ -22,16 +22,17 @@
 #include <GL/gl.h>
 #include <GL/glext.h>
 
+#include "logicdata.h"
+#include "logicdatasnapshot.h"
 #include "logicsignal.h"
 
-struct LogicVertex
-{
-       GLfloat x, y;
-};
+using namespace boost;
+using namespace std;
 
-LogicSignal::LogicSignal(QString name, boost::shared_ptr<SignalData> data,
+LogicSignal::LogicSignal(QString name, shared_ptr<LogicData> data,
        int probe_index) :
-       Signal(name, data),
+       Signal(name),
+       _data(data),
        _probe_index(probe_index)
 {
        assert(_probe_index >= 0);
@@ -40,28 +41,93 @@ LogicSignal::LogicSignal(QString name, boost::shared_ptr<SignalData> data,
 void LogicSignal::paint(QGLWidget &widget, const QRect &rect,
        uint64_t scale, int64_t offset)
 {
-       GLuint vbo_id;
+       Point2F *vertex;
+
+       vector< pair<int64_t, bool> > edges;
+
+       assert(_data);
+
+       const queue< shared_ptr<LogicDataSnapshot> > &snapshots =
+               _data->get_snapshots();
+       if(snapshots.empty())
+               return;
+
+       const shared_ptr<LogicDataSnapshot> &snapshot = snapshots.front();
+
+       const int64_t start = 0;
+       const int64_t end = 8000;
+       const int64_t quantization_length = 4;
+
+       snapshot->get_subsampled_edges(edges, start, end,
+               quantization_length, _probe_index);
+
+       // Paint the edges
+       const unsigned int edge_point_count = (edges.size() - 2) * 2;
+       Point2F *const edge_points = new Point2F[edge_point_count];
+       vertex = edge_points;
+
+       for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin() + 1;
+           i != edges.end() - 1; i++)
+       {
+               const int x = edge.first / quantization_length +
+                       rect.left();
+
+               vertex->x = x, vertex->y = 10 + rect.top() - 1;
+               vertex++;
+               vertex->x = x, vertex->y = 40 + rect.top();
+               vertex++;
+       }
 
        glColor3f(0,0,1);
-       LogicVertex vetices[3];
-       vetices[0].x = rect.left();
-       vetices[0].y = rect.top();
-       vetices[1].x = rect.right();
-       vetices[1].y = rect.bottom();
-       vetices[2].x = rect.right();
-       vetices[2].y = rect.top();
+       paint_lines(edge_points, edge_point_count);
+       delete[] edge_points;
+
+       // Paint the caps
+       const unsigned int cap_point_count = (edges.size() - 1) * 2;
+       Point2F *const cap_points = new Point2F[cap_point_count];
+       vertex = cap_points;
+
+       for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin();
+           i != (edges.end() - 1); i++)
+       {
+               const int y = ((*i).second ? 10 : 40) + rect.top();
+
+               vertex->x = (*i).first / quantization_length +
+                       rect.left() - 1;
+               vertex->y = y;
+               vertex++;
+
+               vertex->x = (*(i+1)).first / quantization_length +
+                       rect.left();
+               vertex->y = y;
+               vertex++;
+       }
+
+       glColor3f(0,0,1);
+       paint_lines(cap_points, cap_point_count);
+       delete[] cap_points;
+}
+
+void LogicSignal::paint_lines(Point2F *points, int count)
+{
+       GLuint vbo_id;
+
+       assert(points);
 
        glGenBuffers(1, &vbo_id);
        glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
 
-       glBufferData(GL_ARRAY_BUFFER, sizeof(vetices), NULL, GL_STATIC_DRAW);
-       glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vetices), vetices);
+       const unsigned int vbo_length = count * sizeof(Point2F);
+       glBufferData(GL_ARRAY_BUFFER, vbo_length, NULL, GL_STATIC_DRAW);
+       glBufferSubData(GL_ARRAY_BUFFER, 0, vbo_length, points);
 
        glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
 
-       glVertexPointer(2, GL_FLOAT, sizeof(LogicVertex), 0);
+       glVertexPointer(2, GL_FLOAT, sizeof(Point2F), 0);
 
        glEnableClientState(GL_VERTEX_ARRAY);
-       glDrawArrays(GL_LINE_STRIP,  0,  2);
+       glDrawArrays(GL_LINES,  0,  count);
        glDisableClientState(GL_VERTEX_ARRAY);
+
+       glDeleteBuffers(1, &vbo_id);
 }