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got video working with gl

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This commit is contained in:
Jared Bruni
2020-01-23 22:29:53 -08:00
parent 7b773f0e8f
commit a94d9c4bb1
3 changed files with 59 additions and 29 deletions
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6
src/display_window.cpp
View File

@@ -30,13 +30,13 @@ void DisplayWindow::createControls() {
img_label->setGeometry(0,0,640, 480);
}
void DisplayWindow::displayImage(const QImage &img) {
gl_display->setNewFrame(img);
QRect src(QPoint(0, 0), size());
gl_display->setNewFrame(img.copy());
/*QRect src(QPoint(0, 0), size());
QPixmap p = QPixmap::fromImage(img).scaled(size(),Qt::KeepAspectRatio, Qt::FastTransformation);
QRect dst(QPoint(0,0),p.size());
dst.moveCenter(src.center());
img_label->setGeometry(dst);
img_label->setPixmap(p);
img_label->setPixmap(p); */
}
void DisplayWindow::paintEvent(QPaintEvent *) {

74
src/gl_display.cpp
View File

@@ -13,7 +13,7 @@ glDisplayWindow::glDisplayWindow(QWindow *parent)
: QWindow(parent)
, m_animating(false)
, m_context(0)
, m_device(0)
, m_device(0), updated(false)
{
setSurfaceType(QWindow::OpenGLSurface);
}
@@ -27,6 +27,8 @@ void glDisplayWindow::render(QPainter *painter) {
}
void glDisplayWindow::initialize() {
resize(1280, 720);
glEnable(GL_TEXTURE_2D);
glClearDepth(1.0f);
glClearColor(0, 0, 0, 0);
glMatrixMode(GL_PROJECTION);
@@ -35,35 +37,61 @@ void glDisplayWindow::initialize() {
glEnable (GL_DEPTH_TEST);
}
void glDisplayWindow::setNewFrame(const QImage &new_one) {
frame_copy = new_one;
void glDisplayWindow::setNewFrame(QImage image) {
frame = image;
updated = true;
}
unsigned int texID;
void glDisplayWindow::updateTexture(QImage image) {
static int lazy = 0;
QImage new_one = image.mirrored();
if(lazy == 0) {
glEnable(GL_TEXTURE_2D);
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, new_one.width(), new_one.height(), 0, GL_BGR, GL_UNSIGNED_BYTE, new_one.bits());
lazy = 1;
} else {
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, new_one.width(), new_one.height(), GL_BGR, GL_UNSIGNED_BYTE, new_one.bits());
}
}
void glDisplayWindow::render() {
if (!m_device)
m_device = new QOpenGLPaintDevice;
if(frame_copy.width()>100 && isVisible()) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
float aspect=(float)width()/(float)height();
if(width() <= height())
glOrtho ( -5.0, 5.0, -5.0/aspect, 5.0/aspect, -5.0, 5.0);
else
glOrtho (-5.0*aspect, 5.0*aspect, -5.0, 5.0, -5.0, 5.0);
if(frame_copy.width() > 25 && frame_copy.height() > 25) {
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glDrawPixels(frame_copy.width(), frame_copy.height(), GL_RGB,GL_UNSIGNED_BYTE,(unsigned char*)frame_copy.bits());
glFlush();
}
if(updated == true && frame.width()>100 && frame.height()>100) {
updateTexture(frame);
updated = false;
}
m_device->setPaintFlipped(true);
m_device->setSize(size() * devicePixelRatio());
m_device->setDevicePixelRatio(devicePixelRatio());
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, 1280, 0, 720, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClear(GL_COLOR_BUFFER_BIT);
glBindTexture(GL_TEXTURE_2D, tex);
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
glTexCoord2i(0, 0); glVertex2i(0, 0);
glTexCoord2i(0, 1); glVertex2i(0, 720);
glTexCoord2i(1, 1); glVertex2i(1280, 720);
glTexCoord2i(1, 0); glVertex2i(1280, 0);
glEnd();
glDisable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
//m_device->setSize(size() * devicePixelRatio());
//m_device->setDevicePixelRatio(devicePixelRatio());
QPainter painter(m_device);
render(&painter);
}

8
src/gl_display.h
View File

@@ -24,8 +24,8 @@ public:
virtual void initialize();
void setAnimating(bool animating);
void setNewFrame(const QImage &image);
void setNewFrame(QImage image);
void updateTexture(QImage image);
public slots:
void renderLater();
void renderNow();
@@ -37,9 +37,11 @@ protected:
private:
bool m_animating;
QImage frame_copy;
QOpenGLContext *m_context;
QOpenGLPaintDevice *m_device;
GLuint tex;
QImage frame;
bool updated;
};
#endif