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Qt5OpenGL: implement grabFramebuffer

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This commit is contained in:
wmayer
2017-03-12 19:08:38 +01:00
parent ed33adc35d
commit e1c5597a5e
2 changed files with 44 additions and 35 deletions
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78
src/Gui/View3DInventorViewer.cpp
View File

@@ -1356,41 +1356,7 @@ void View3DInventorViewer::setRenderType(const RenderType type)
break;
case Image:
{
QtGLWidget* gl = static_cast<QtGLWidget*>(this->viewport());
gl->makeCurrent();
#if !defined(HAVE_QT5_OPENGL)
int w = gl->width();
int h = gl->height();
QImage img(QSize(w,h), QImage::Format_RGB32);
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, img.bits());
glImage = img;
#else
const SbViewportRegion vp = this->getSoRenderManager()->getViewportRegion();
SbVec2s size = vp.getViewportSizePixels();
int width = size[0];
int height = size[1];
int samples = getNumSamples();
if (samples == 0) {
// if anti-aliasing is off we can directly use glReadPixels
QImage img(QSize(width, height), QImage::Format_RGB32);
glReadPixels(0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, img.bits());
glImage = img;
}
else {
QOpenGLFramebufferObjectFormat fboFormat;
fboFormat.setSamples(getNumSamples());
fboFormat.setAttachment(QOpenGLFramebufferObject::Depth);
fboFormat.setTextureTarget(GL_TEXTURE_2D);
fboFormat.setInternalTextureFormat(GL_RGBA32F_ARB);
QOpenGLFramebufferObject fbo(width, height, fboFormat);
renderToFramebuffer(&fbo);
glImage = fbo.toImage(false);
}
#endif
gl->doneCurrent();
glImage = grabFramebuffer();
}
break;
}
@@ -1401,6 +1367,48 @@ View3DInventorViewer::RenderType View3DInventorViewer::getRenderType() const
return this->renderType;
}
QImage View3DInventorViewer::grabFramebuffer()
{
QtGLWidget* gl = static_cast<QtGLWidget*>(this->viewport());
gl->makeCurrent();
QImage res;
#if !defined(HAVE_QT5_OPENGL)
int w = gl->width();
int h = gl->height();
QImage img(QSize(w,h), QImage::Format_RGB32);
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, img.bits());
res = img;
#else
const SbViewportRegion vp = this->getSoRenderManager()->getViewportRegion();
SbVec2s size = vp.getViewportSizePixels();
int width = size[0];
int height = size[1];
int samples = getNumSamples();
if (samples == 0) {
// if anti-aliasing is off we can directly use glReadPixels
QImage img(QSize(width, height), QImage::Format_RGB32);
glReadPixels(0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, img.bits());
res = img;
}
else {
QOpenGLFramebufferObjectFormat fboFormat;
fboFormat.setSamples(getNumSamples());
fboFormat.setAttachment(QOpenGLFramebufferObject::Depth);
fboFormat.setTextureTarget(GL_TEXTURE_2D);
fboFormat.setInternalTextureFormat(GL_RGB32F_ARB);
QOpenGLFramebufferObject fbo(width, height, fboFormat);
renderToFramebuffer(&fbo);
res = fbo.toImage(false);
}
#endif
gl->doneCurrent();
return res;
}
void View3DInventorViewer::renderToFramebuffer(QtGLFramebufferObject* fbo)
{
static_cast<QtGLWidget*>(this->viewport())->makeCurrent();

1
src/Gui/View3DInventorViewer.h
View File

@@ -159,6 +159,7 @@ public:
void setRenderType(const RenderType type);
RenderType getRenderType() const;
void renderToFramebuffer(QtGLFramebufferObject*);
QImage grabFramebuffer();
virtual void setViewing(SbBool enable);
virtual void setCursorEnabled(SbBool enable);