X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=logicsignal.cpp;h=79a27ddd05c97996cc6f7332b3b6b3a7ab4e4058;hp=8f984ea7ab4616c5d054cbedd01f09a5e88dfe76;hb=215f9499495716d6a33b53b0fa9cac47f0e43fbd;hpb=81a635d1f697166ce7bf78eda52c58ddf268d371

diff --git a/logicsignal.cpp b/logicsignal.cpp
index 8f984ea7..79a27ddd 100644
--- a/logicsignal.cpp
+++ b/logicsignal.cpp
@@ -22,46 +22,172 @@
 #include <GL/gl.h>
 #include <GL/glext.h>
 
+#include <math.h>
+
+#include "extdef.h"
+
+#include "logicdata.h"
+#include "logicdatasnapshot.h"
 #include "logicsignal.h"
 
-struct LogicVertex
-{
-	GLfloat x, y;
+using namespace boost;
+using namespace std;
+
+const float Log2 = logf(2.0f);
+
+const float LogicSignal::Margin = 10.0f;
+
+const float LogicSignal::EdgeColour[3] =	{0.50f, 0.50f, 0.50f};
+const float LogicSignal::HighColour[3] =	{0.00f, 0.75f, 0.00f};
+const float LogicSignal::LowColour[3] =	{0.75f, 0.00f, 0.00f};
+
+const QColor LogicSignal::LogicSignalColours[10] = {
+	QColor(0x16, 0x19, 0x1A),	// Black
+	QColor(0x8F, 0x52, 0x02),	// Brown
+	QColor(0xCC, 0x00, 0x00),	// Red
+	QColor(0xF5, 0x79, 0x00),	// Orange
+	QColor(0xED, 0xD4, 0x00),	// Yellow
+	QColor(0x73, 0xD2, 0x16),	// Green
+	QColor(0x34, 0x65, 0xA4),	// Blue
+	QColor(0x75, 0x50, 0x7B),	// Violet
+	QColor(0x88, 0x8A, 0x85),	// Grey
+	QColor(0xEE, 0xEE, 0xEC),	// White
 };
 
-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);
 }
 
 void LogicSignal::paint(QGLWidget &widget, const QRect &rect,
-	uint64_t scale, int64_t offset)
+	double scale, double offset)
+{
+	Point2F *vertex;
+
+	vector< pair<int64_t, bool> > edges;
+
+	assert(scale > 0);
+	assert(_data);
+
+	const float high_offset = rect.top() + Margin;
+	const float low_offset = rect.bottom() - Margin;
+
+	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 = snapshot->get_sample_count() - 1;
+	const double samples_per_pixel = samplerate * scale;
+	const double start = samplerate * (offset - start_time);
+	const double end = start + samples_per_pixel * rect.width();
+	const int64_t quantization_length = 1LL << (int64_t)floorf(
+		max(logf((float)samples_per_pixel) / Log2, 0.0f));
+
+	snapshot->get_subsampled_edges(edges,
+		min(max((int64_t)floor(start), (int64_t)0), last_sample),
+		min(max((int64_t)ceil(end), (int64_t)0), last_sample),
+		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 = high_offset;
+		vertex++;
+		vertex->x = x, vertex->y = low_offset;
+		vertex++;
+	}
+
+	glColor3fv(EdgeColour);
+	paint_lines(edge_points, edge_point_count);
+	delete[] edge_points;
+
+	// Paint the caps
+	const unsigned int max_cap_point_count = (edges.size() - 1) * 2;
+	Point2F *const cap_points = new Point2F[max_cap_point_count];
+
+	glColor3fv(HighColour);
+	paint_caps(cap_points, edges, true, samples_per_pixel,
+		pixels_offset, rect.left(), high_offset);
+	glColor3fv(LowColour);
+	paint_caps(cap_points, edges, false, samples_per_pixel,
+		pixels_offset, rect.left(), low_offset);
+
+	delete[] cap_points;
+}
+
+int LogicSignal::paint_caps(Point2F *const cap_points,
+	vector< pair<int64_t, bool> > &edges, bool level,
+	double samples_per_pixel, double pixels_offset, int x_offset,
+	int y_offset)
+{
+	Point2F *vertex = cap_points;
+
+	for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin();
+	    i != (edges.end() - 1); i++)
+		if((*i).second == level)
+		{
+			vertex->x = (int)((*i).first / samples_per_pixel -
+				pixels_offset) + x_offset - 1;
+			vertex->y = y_offset;
+			vertex++;
+
+			vertex->x = (int)((*(i+1)).first / samples_per_pixel -
+				pixels_offset) + x_offset;
+			vertex->y = y_offset;
+			vertex++;
+		}
+
+	paint_lines(cap_points, vertex - cap_points);
+}
+
+void LogicSignal::paint_lines(Point2F *points, int count)
 {
 	GLuint vbo_id;
 
-	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();
+	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);
+}
+
+QColor LogicSignal::get_colour() const
+{
+	return LogicSignalColours[_probe_index % countof(LogicSignalColours)];
+}
+
+int LogicSignal::get_nominal_offset(const QRect &rect) const
+{
+	return rect.bottom() - Margin;
 }