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@ -16,54 +16,145 @@
@@ -16,54 +16,145 @@
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#include "selfcamview.h" |
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#include "camera.h" |
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#include <QCloseEvent> |
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#include <QShowEvent> |
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#include <QTimer> |
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#include <QLabel> |
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#include <QHBoxLayout> |
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#include <opencv2/opencv.hpp> |
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using namespace cv; |
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#include <QOpenGLBuffer> |
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#include <QOpenGLShaderProgram> |
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#include <QDebug> |
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SelfCamView::SelfCamView(Camera* Cam, QWidget* parent) |
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: QWidget(parent), displayLabel{new QLabel}, |
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mainLayout{new QHBoxLayout()}, cam(Cam), updateDisplayTimer{new QTimer} |
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: QGLWidget(QGLFormat(QGL::SampleBuffers), parent) |
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, camera(Cam) |
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, pbo(nullptr) |
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, program(nullptr) |
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, textureId(0) |
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, pboAllocSize(0) |
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{ |
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setLayout(mainLayout); |
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setWindowTitle(SelfCamView::tr("Tox video test","Title of the window to test the video/webcam")); |
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setMinimumSize(320,240); |
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updateDisplayTimer->setInterval(5); |
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updateDisplayTimer->setSingleShot(false); |
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displayLabel->setAlignment(Qt::AlignCenter); |
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mainLayout->addWidget(displayLabel); |
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camera->suscribe(); |
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camera->setVideoMode(camera->getBestVideoMode()); |
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connect(updateDisplayTimer, SIGNAL(timeout()), this, SLOT(updateDisplay())); |
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setFixedSize(camera->getBestVideoMode().res); |
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} |
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void SelfCamView::closeEvent(QCloseEvent* event) |
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SelfCamView::~SelfCamView() |
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{ |
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cam->unsuscribe(); |
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updateDisplayTimer->stop(); |
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event->accept(); |
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if (pbo) |
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delete pbo; |
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if (textureId != 0) |
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glDeleteTextures(1, &textureId); |
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} |
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void SelfCamView::showEvent(QShowEvent* event) |
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void SelfCamView::initializeGL() |
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{ |
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cam->suscribe(); |
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updateDisplayTimer->start(); |
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event->accept(); |
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updateTimer = new QTimer(this); |
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updateTimer->setSingleShot(false); |
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updateTimer->setInterval(1000.0 / camera->getVideoMode().fps); |
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connect(updateTimer, &QTimer::timeout, this, &SelfCamView::update); |
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updateTimer->start(); |
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} |
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void SelfCamView::updateDisplay() |
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void SelfCamView::paintGL() |
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{ |
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displayLabel->setPixmap(QPixmap::fromImage(cam->getLastImage()).scaled(displayLabel->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation)); |
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cv::Mat3b frame = camera->getLastFrame(); |
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int frameBytes = frame.total() * frame.channels(); |
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if (!pbo) |
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{ |
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qDebug() << "Creating pbo, program"; |
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// pbo
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pbo = new QOpenGLBuffer(QOpenGLBuffer::PixelUnpackBuffer); |
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pbo->setUsagePattern(QOpenGLBuffer::StreamDraw); |
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pbo->create(); |
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// shaders
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program = new QOpenGLShaderProgram; |
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program->addShaderFromSourceCode(QOpenGLShader::Vertex, |
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"attribute vec4 vertices;" |
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"varying vec2 coords;" |
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"void main() {" |
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" gl_Position = vec4(vertices.xy,0.0,1.0);" |
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" coords = vertices.xy*vec2(0.5,0.5)+vec2(0.5,0.5);" |
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"}"); |
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program->addShaderFromSourceCode(QOpenGLShader::Fragment, |
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"uniform sampler2D texture0;" |
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"varying vec2 coords;" |
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"void main() {" |
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" gl_FragColor = texture2D(texture0,coords*vec2(1.0, -1.0));" |
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"}"); |
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program->bindAttributeLocation("vertices", 0); |
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program->link(); |
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// a texture used to render the pbo (has the match the pixelformat of the source)
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GLuint texture[1]; |
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glGenTextures(1,texture); |
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glBindTexture(GL_TEXTURE_2D,texture[0]); |
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glTexImage2D(GL_TEXTURE_2D,0, GL_RGB, frame.cols, frame.rows, 0, GL_RGB, GL_UNSIGNED_BYTE, 0); |
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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textureId = texture[0]; |
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} |
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if (pboAllocSize != frameBytes) |
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{ |
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qDebug() << "Resize pbo " << frameBytes << "bytes (was" << pboAllocSize << ")"; |
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pbo->bind(); |
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pbo->allocate(frameBytes); |
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pbo->release(); |
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pboAllocSize = frameBytes; |
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} |
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// transfer data
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pbo->bind(); |
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void* ptr = pbo->map(QOpenGLBuffer::WriteOnly); |
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if (ptr) |
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memcpy(ptr, frame.data, frameBytes); |
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pbo->unmap(); |
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//transfer pbo data to texture
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glBindTexture(GL_TEXTURE_2D, textureId); |
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glTexSubImage2D(GL_TEXTURE_2D,0,0,0, frame.cols, frame.rows, GL_RGB, GL_UNSIGNED_BYTE, 0); |
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glBindTexture(GL_TEXTURE_2D, 0); |
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// render pbo
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float values[] = { |
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-1, -1, |
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1, -1, |
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-1, 1, |
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1, 1 |
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}; |
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program->setAttributeArray(0, GL_FLOAT, values, 2); |
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glClearColor(0, 0, 0, 1); |
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glClear(GL_COLOR_BUFFER_BIT); |
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glViewport(0, 0, width(), height()); |
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program->bind(); |
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program->enableAttributeArray(0); |
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glBindTexture(GL_TEXTURE_2D, textureId); |
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//draw fullscreen quad
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |
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program->disableAttributeArray(0); |
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program->release(); |
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pbo->release(); |
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} |
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void SelfCamView::resizeEvent(QResizeEvent *e) |
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void SelfCamView::update() |
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{ |
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Q_UNUSED(e) |
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updateDisplay(); |
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QGLWidget::update(); |
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} |
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krepa098
11 years ago