Initial VBO code

[pulseview.git] / logicsignal.cpp

diff --git a/logicsignal.cpp b/logicsignal.cpp
index 09a65afca5a32188186f9352f77e328ff00f979f..8f984ea7ab4616c5d054cbedd01f09a5e88dfe76 100644 (file)
--- a/logicsignal.cpp
+++ b/logicsignal.cpp
@@ -18,8 +18,17 @@
  * 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 "logicsignal.h"
 
+struct LogicVertex
+{
+       GLfloat x, y;
+};
+
 LogicSignal::LogicSignal(QString name, boost::shared_ptr<SignalData> data,
        int probe_index) :
        Signal(name, data),
@@ -31,10 +40,28 @@ 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();
+       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();
+
+       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);
+
+       glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
+
+       glVertexPointer(2, GL_FLOAT, sizeof(LogicVertex), 0);
+
+       glEnableClientState(GL_VERTEX_ARRAY);
+       glDrawArrays(GL_LINE_STRIP,  0,  2);
+       glDisableClientState(GL_VERTEX_ARRAY);
 }