qt 环境下 显示gif或者采集相机数据 并显示

#include "widget.h" #include <QGLWidget> #include "myvideosurface.h" Widget::Widget(QWidget *parent) : QOpenGLWidget(parent) , m_eType(type_gif) , m_pSurface(NULL) , m_tex_id(-1) { connect(&m_movie, SIGNAL(frameChanged(int)), this, SLOT(slotframeChanged(int))); //如果你想显示本地相机，请去掉下面代码的注释 //m_eType = type_camera; } Widget::~Widget() { m_pSurface = NULL; m_movie.stop(); } void Widget::startpaint() { if(type_gif == m_eType) { m_movie.stop(); m_movie.setFileName(":/imageexample1.gif"); m_movie.start(); } else if(type_camera == m_eType) { if(NULL == m_pSurface) { m_pSurface = new MyVideoSurface(this); connect(m_pSurface, SIGNAL(signalsurfacepaintimage(QImage)), this, SLOT(updatacameraimage(QImage))); } m_pSurface->slotstartcamera(); } } void Widget::slotframeChanged(int frame) { Q_UNUSED(frame); m_image = m_movie.currentImage(); update(); } void Widget::updatacameraimage(QImage image) { m_image = image; update(); } QSize Widget::sizeHint() const { return QSize(640, 480); } void Widget::initializeGL() { initializeOpenGLFunctions(); } void Widget::paintGL() { if(m_image.isNull()) return; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //开启纹理; glEnable(GL_TEXTURE_2D); paintglid(); glBegin(GL_QUADS); glTexCoord2f(0.0f,0.0f); glVertex2f(-1.0f,-1.0f); glTexCoord2f(1.0f, 0.0f); glVertex2f(1.0f, -1.0f); glTexCoord2f(1.0f, 1.0f); glVertex2f( 1.0f, 1.0f); glTexCoord2f(0.0f, 1.0f); glVertex2f( -1.0f, 1.0f); glEnd(); } void Widget::resizeGL(int w, int h) { Q_UNUSED(w); Q_UNUSED(h); } void Widget::paintglid() { QImage tex = m_image.mirrored(); //tex = QGLWidget::convertToGLFormat(m_image); if(-1 == (int)m_tex_id) { glGenTextures(1, &m_tex_id); //绑定纹理 glBindTexture(GL_TEXTURE_2D, m_tex_id); glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); //绘制图片; glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, tex.width(), tex.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, tex.bits() ); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST); } else { glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, tex.width(), tex.height(), GL_RGBA, GL_UNSIGNED_BYTE, tex.bits() ); } }