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/* Copyright (c) 2012 Patrick Ruoff
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*/
#include "video_widget.h"
#include <QDebug>
using namespace std;
// ----------------------------------------------------------------------------
void VideoWidget::initializeGL()
{
glClearColor(0.0, 0.0, 0.0, 0.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void VideoWidget::resizeGL(int w, int h)
{
// setup 1 to 1 projection
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, w, 0, h, -1, 1);
resize_frame(resized_qframe);
glDisable(GL_DEPTH_TEST);
glBegin(GL_QUADS);
glVertex2f(0,0);
glVertex2f(1,0);
glVertex2f(1,1);
glVertex2f(0,1);
glEnd();
}
void VideoWidget::paintGL()
{
QMutexLocker lck(&mtx);
if (resized_qframe.size() == size() || (resized_qframe.width() <= width() && resized_qframe.height() <= height()))
{
glDrawPixels(resized_qframe.width(), resized_qframe.height(), GL_RGB, GL_UNSIGNED_BYTE, resized_qframe.bits());
}
else
glClear(GL_DEPTH_BUFFER_BIT);
glFlush();
}
void VideoWidget::resize_frame(QImage& qframe)
{
QMutexLocker lck(&mtx);
if (qframe.size() == size() || (qframe.width() <= width() && qframe.height() <= height()))
resized_qframe = qframe.copy();
else
resized_qframe = qframe.scaled(size(), Qt::IgnoreAspectRatio, Qt::FastTransformation).copy();
}
void VideoWidget::updateImage(unsigned char *frame, int width, int height)
{
QImage foo = QImage(frame, width, height, 3 * width, QImage::Format_RGB888).rgbSwapped().mirrored();
resize_frame(foo);
}
void VideoWidget::update() {
updateGL();
}
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