X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=logicsignal.cpp;h=584be441acfad737330ea0ac87d1bda99b7ab029;hp=09a65afca5a32188186f9352f77e328ff00f979f;hb=7cd5faf8cfed1871195aed7a4c325342172944b3;hpb=3b18c57d8f224791481e0b768065bd4d11a3d79e

diff --git a/logicsignal.cpp b/logicsignal.cpp
index 09a65afc..584be441 100644
--- a/logicsignal.cpp
+++ b/logicsignal.cpp
@@ -18,11 +18,25 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#define GL_GLEXT_PROTOTYPES
+#include <GL/gl.h>
+#include <GL/glext.h>
+
+#include <math.h>
+
+#include "logicdata.h"
+#include "logicdatasnapshot.h"
 #include "logicsignal.h"
 
-LogicSignal::LogicSignal(QString name, boost::shared_ptr<SignalData> data,
+using namespace boost;
+using namespace std;
+
+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);
@@ -31,10 +45,98 @@ LogicSignal::LogicSignal(QString name, boost::shared_ptr<SignalData> data,
 void LogicSignal::paint(QGLWidget &widget, const QRect &rect,
 	uint64_t scale, int64_t offset)
 {
-	glColor3f(1,0,0);
-	glBegin(GL_POLYGON);
-	glVertex2f(rect.left(), rect.top());
-	glVertex2f(rect.right(), rect.top());
-	glVertex2f(rect.right(), rect.bottom());
-	glEnd();
+	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 uint64_t samplerate = _data->get_samplerate();
+	const int64_t start_time = _data->get_start_time();
+	const float samples_per_pixel = samplerate * scale / 1e15f;
+	const int64_t start = samplerate * (offset - start_time) /
+		1000000000000000ULL;
+	const int64_t end = start + samples_per_pixel * rect.width();
+	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) +
+			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);
+	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) +
+			rect.left() - 1;
+		vertex->y = y;
+		vertex++;
+
+		vertex->x = (int)((*(i+1)).first / samples_per_pixel) +
+			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);
+
+	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(Point2F), 0);
+
+	glEnableClientState(GL_VERTEX_ARRAY);
+	glDrawArrays(GL_LINES,  0,  count);
+	glDisableClientState(GL_VERTEX_ARRAY);
+
+	glDeleteBuffers(1, &vbo_id);
 }