void NightModeGraphicsEffect::draw(QPainter* painter)
{
int pixelRatio = painter->device()->devicePixelRatio();
QSize size(painter->device()->width() * pixelRatio, painter->device()->height() * pixelRatio);
if (fbo && fbo->size() != size)
{
delete fbo;
fbo = NULL;
}
if (!fbo)
{
QGLFramebufferObjectFormat format;
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
format.setInternalTextureFormat(GL_RGBA);
fbo = new NightModeGraphicsEffectFbo(size, format, pixelRatio);
}
QPainter fboPainter(fbo);
drawSource(&fboPainter);
painter->save();
painter->beginNativePainting();
program->bind();
const GLfloat pos[] = {-1, -1, +1, -1, -1, +1, +1, +1};
const GLfloat texCoord[] = {0, 0, 1, 0, 0, 1, 1, 1};
program->setUniformValue(vars.source, 0);
program->setAttributeArray(vars.pos, pos, 2);
program->setAttributeArray(vars.texCoord, texCoord, 2);
program->enableAttributeArray(vars.pos);
program->enableAttributeArray(vars.texCoord);
glBindTexture(GL_TEXTURE_2D, fbo->texture());
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
program->release();
painter->endNativePainting();
painter->restore();
}
void CubeItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
// Render the inner scene into a framebuffer object.
// We do this while the ordinary Qt paint engine has
// control of the GL context rather than later when the
// QGLPainter has control of the GL context.
if (mScene) {
if (!fbo) {
QGLFramebufferObjectFormat format;
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
//format.setSamples(8);
fbo = new QGLFramebufferObject
(mScene->sceneRect().size().toSize(), format);
}
QRectF rect(0, 0, fbo->size().width(), fbo->size().height());
QPainter fboPainter(fbo);
fboPainter.save();
QLinearGradient gradient(rect.topLeft(), rect.bottomRight());
gradient.setColorAt(0, QColor(0, 128, 192, 255));
gradient.setColorAt(1, QColor(0, 0, 128, 255));
fboPainter.setPen(QPen(Qt::black, 3));
fboPainter.setBrush(gradient);
fboPainter.drawRect(rect);
fboPainter.restore();
mScene->render(&fboPainter, rect);
}
// Now render the GL parts of the item using QGLPainter.
QGLGraphicsViewportItem::paint(painter, option, widget);
}
void QwtPlotGLCanvas::paintGL()
{
const bool hasFocusIndicator =
hasFocus() && focusIndicator() == CanvasFocusIndicator;
QPainter painter;
#if QT_VERSION < 0x040600
painter.begin( this );
draw( &painter );
#else
if ( testPaintAttribute( QwtPlotGLCanvas::BackingStore ) )
{
if ( d_data->fbo == NULL || d_data->fbo->size() != size() )
{
invalidateBackingStore();
const int numSamples = 16;
QGLFramebufferObjectFormat format;
format.setSamples( numSamples );
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
QGLFramebufferObject fbo( size(), format );
QPainter fboPainter( &fbo );
draw( &fboPainter);
fboPainter.end();
d_data->fbo = new QGLFramebufferObject( size() );
QRect rect(0, 0, width(), height());
QGLFramebufferObject::blitFramebuffer(d_data->fbo, rect, &fbo, rect);
}
// drawTexture( QRectF( -1.0, 1.0, 2.0, -2.0 ), d_data->fbo->texture() );
if ( hasFocusIndicator )
painter.begin( this );
glBindTexture(GL_TEXTURE_2D, d_data->fbo->texture());
glEnable(GL_TEXTURE_2D);
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();
}
else
{
painter.begin( this );
draw( &painter );
}
#endif
if ( hasFocus() && focusIndicator() == CanvasFocusIndicator )
drawFocusIndicator( &painter );
}
