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Using std future promises to get thumbnail of render view

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Bruno
2021-04-24 13:14:57 +02:00
parent 5473c0b38b
commit f643e80de7
4 changed files with 32 additions and 16 deletions
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35
RenderView.cpp
View File

@@ -13,6 +13,7 @@
RenderView::RenderView() : View(RENDERING), frame_buffer_(nullptr), fading_overlay_(nullptr)
// ,thumbnail_(nullptr), thumbnail_ready_(false)
{
}
@@ -81,26 +82,32 @@ void RenderView::draw()
fading_overlay_->draw(glm::identity<glm::mat4>(), projection);
frame_buffer_->end();
}
}
if (thumbnailer_.valid()) {
FrameBufferImage *RenderView::thumbnail () const
{
FrameBufferImage *thumbnail = nullptr;
if (frame_buffer_) {
FrameBuffer *frame_thumbnail = new FrameBuffer( glm::vec3(SESSION_THUMBNAIL_HEIGHT * frame_buffer_->aspectRatio(), SESSION_THUMBNAIL_HEIGHT, 1.f) );
if (frame_buffer_) {
FrameBufferSurface *thumb = new FrameBufferSurface(frame_buffer_);
FrameBuffer *frame_thumbnail = new FrameBuffer( glm::vec3(SESSION_THUMBNAIL_HEIGHT * frame_buffer_->aspectRatio(), SESSION_THUMBNAIL_HEIGHT, 1.f) );
FrameBufferSurface *thumb = new FrameBufferSurface(frame_buffer_);
frame_thumbnail->begin();
thumb->draw(glm::identity<glm::mat4>(), frame_thumbnail->projection());
frame_thumbnail->end();
delete thumb;
frame_thumbnail->begin();
thumb->draw(glm::identity<glm::mat4>(), frame_thumbnail->projection());
frame_thumbnail->end();
// frame_buffer_->blit(frame_thumbnail); // a tester...
thumbnail = frame_thumbnail->image();
thumbnail_.set_value( frame_thumbnail->image() );
delete thumb;
delete frame_thumbnail;
delete frame_thumbnail;
}
}
return thumbnail;
}
FrameBufferImage *RenderView::thumbnail ()
{
thumbnailer_ = thumbnail_.get_future();
return thumbnailer_.get();
}