#include <GL/gl.h>
#include <GL/glext.h>
+#include <math.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,
+const float Log2 = logf(2.0f);
+
+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);
}
void LogicSignal::paint(QGLWidget &widget, const QRect &rect,
- uint64_t scale, int64_t offset)
+ double scale, double offset)
{
- GLuint vbo_id;
+ Point2F *vertex;
+
+ vector< pair<int64_t, bool> > edges;
+
+ assert(scale > 0);
+ assert(_data);
+
+ const queue< shared_ptr<LogicDataSnapshot> > &snapshots =
+ _data->get_snapshots();
+ if(snapshots.empty())
+ return;
+
+ const shared_ptr<LogicDataSnapshot> &snapshot = snapshots.front();
+
+ const double pixels_offset = offset / scale;
+ const double samplerate = _data->get_samplerate();
+ const double start_time = _data->get_start_time();
+ const int64_t last_sample = (int64_t)snapshot->get_sample_count() - 1;
+ const double samples_per_pixel = samplerate * scale;
+ const int64_t start = min(max((int64_t)(samplerate * (offset - start_time)),
+ (int64_t)0), last_sample);
+ const int64_t end = min((int64_t)(start + samples_per_pixel * rect.width()),
+ last_sample);
+ const int64_t quantization_length = 1LL << (int64_t)floorf(
+ max(logf(samples_per_pixel / Log2), 0.0f));
+
+ 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 = (int)((*i).first / samples_per_pixel - pixels_offset) +
+ 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 = (int)((*i).first / samples_per_pixel - pixels_offset) +
+ rect.left() - 1;
+ vertex->y = y;
+ vertex++;
+
+ vertex->x = (int)((*(i+1)).first / samples_per_pixel - pixels_offset) +
+ 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);
}