QGLFramebufferObject *QGLFramebufferObjectPool::acquire(const QSize &requestSize, const QGLFramebufferObjectFormat &requestFormat, bool strictSize)
{
QGLFramebufferObject *chosen = 0;
QGLFramebufferObject *candidate = 0;
for (int i = 0; !chosen && i < m_fbos.size(); ++i) {
QGLFramebufferObject *fbo = m_fbos.at(i);
if (strictSize) {
if (fbo->size() == requestSize && fbo->format() == requestFormat) {
chosen = fbo;
break;
} else {
continue;
}
}
if (fbo->format() == requestFormat) {
// choose the fbo with a matching format and the closest size
if (!candidate || areaDiff(requestSize, candidate) > areaDiff(requestSize, fbo))
candidate = fbo;
}
if (candidate) {
m_fbos.removeOne(candidate);
const QSize fboSize = candidate->size();
QSize sz = fboSize;
if (sz.width() < requestSize.width())
sz.setWidth(qMax(requestSize.width(), qRound(sz.width() * 1.5)));
if (sz.height() < requestSize.height())
sz.setHeight(qMax(requestSize.height(), qRound(sz.height() * 1.5)));
// wasting too much space?
if (sz.width() * sz.height() > requestSize.width() * requestSize.height() * 4)
sz = requestSize;
if (sz != fboSize) {
delete candidate;
candidate = new QGLFramebufferObject(maybeRoundToNextPowerOfTwo(sz), requestFormat);
}
chosen = candidate;
}
}
if (!chosen) {
if (strictSize)
chosen = new QGLFramebufferObject(requestSize, requestFormat);
else
chosen = new QGLFramebufferObject(maybeRoundToNextPowerOfTwo(requestSize), requestFormat);
}
if (!chosen->isValid()) {
delete chosen;
chosen = 0;
}
return chosen;
}
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 VideoView::paintGL(QGLPainter *painter)
{
QGLFramebufferObject *fbo = fboSurface->framebufferObject();
if (fbo) {
painter->setStandardEffect(QGL::FlatReplaceTexture2D);
painter->setTexture(QGLTexture2D::fromTextureId(fbo->texture(), fbo->size()));
} else {
painter->setStandardEffect(QGL::LitMaterial);
}
teapot.draw(painter);
}
void resizeGL(int width, int height)
{
#if 0
fbObject->bind();
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (width <= height) {
glOrtho(0.0, 20.0, 0.0, 20.0 * GLfloat(height) / GLfloat(width),
-10.0, 10.0);
} else {
glOrtho(0.0, 20.0 * GLfloat(width) / GLfloat(height), 0.0, 20.0,
-10.0, 10.0);
}
glMatrixMode(GL_MODELVIEW);
drawTeapots();
fbObject->release();
#else
fbObject->bind();
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LINE_SMOOTH);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDepthRange(0.1,1.0);
SoGLRenderAction gl(SbViewportRegion(fbObject->size().width(),fbObject->size().height()));
gl.apply(view->getSoRenderManager()->getSceneGraph());
fbObject->release();
#endif
}
void paintGL()
{
const SbViewportRegion vp = view->getSoRenderManager()->getViewportRegion();
SbVec2s size = vp.getViewportSizePixels();
glDisable(GL_LIGHTING);
glViewport(0, 0, size[0], size[1]);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glDisable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, fbObject->texture());
glColor3f(1.0, 1.0, 1.0);
GLfloat s = size[0] / GLfloat(fbObject->size().width());
GLfloat t = size[1] / GLfloat(fbObject->size().height());
glBegin(GL_QUADS);
glTexCoord2f(0.0, 0.0);
glVertex2f(-1.0, -1.0);
glTexCoord2f(s, 0.0);
glVertex2f(1.0, -1.0);
glTexCoord2f(s, t);
glVertex2f(1.0, 1.0);
glTexCoord2f(0.0, t);
glVertex2f(-1.0, 1.0);
glEnd();
if (rubberBandIsShown) {
glMatrixMode(GL_PROJECTION);
glOrtho(0, size[0], size[1], 0, 0, 100);
glMatrixMode(GL_MODELVIEW);
glDisable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glLineWidth(4.0);
glColor4f(1.0f, 1.0f, 1.0f, 0.2f);
glRecti(rubberBandCorner1.x(), rubberBandCorner1.y(),
rubberBandCorner2.x(), rubberBandCorner2.y());
glColor4f(1.0, 1.0, 0.0, 0.5);
glLineStipple(3, 0xAAAA);
glEnable(GL_LINE_STIPPLE);
glBegin(GL_LINE_LOOP);
glVertex2i(rubberBandCorner1.x(), rubberBandCorner1.y());
glVertex2i(rubberBandCorner2.x(), rubberBandCorner1.y());
glVertex2i(rubberBandCorner2.x(), rubberBandCorner2.y());
glVertex2i(rubberBandCorner1.x(), rubberBandCorner2.y());
glEnd();
glLineWidth(1.0);
glDisable(GL_LINE_STIPPLE);
glDisable(GL_BLEND);
}
glEnable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
}
