itsmattkc
76c0399b75
While very much incomplete, transitions can now be created and will render correctly.
77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
#ifndef OPENGLPROCESSOR_H
|
|
#define OPENGLPROCESSOR_H
|
|
|
|
#include <QOffscreenSurface>
|
|
#include <QOpenGLContext>
|
|
|
|
#include "../videorenderworker.h"
|
|
#include "openglframebuffer.h"
|
|
#include "openglshadercache.h"
|
|
#include "opengltexturecache.h"
|
|
|
|
class OpenGLWorker : public VideoRenderWorker {
|
|
Q_OBJECT
|
|
public:
|
|
OpenGLWorker(QOpenGLContext* share_ctx,
|
|
OpenGLShaderCache* shader_cache,
|
|
OpenGLTextureCache* texture_cache,
|
|
VideoRenderFrameCache* frame_cache,
|
|
QObject* parent = nullptr);
|
|
|
|
virtual ~OpenGLWorker() override;
|
|
|
|
protected:
|
|
/**
|
|
* @brief Initialize OpenGL instance in whatever thread this object is a part of
|
|
*
|
|
* This function creates a context (shared with share_ctx provided in the constructor) as well as various other
|
|
* OpenGL thread-specific objects necessary for rendering. This function should only ever be called from the main
|
|
* thread (i.e. the thread where share_ctx is current on) but AFTER this object has been pushed to its thread with
|
|
* moveToThread(). If this function is called from a different thread, it could fail or even segfault on some
|
|
* platforms.
|
|
*
|
|
* The reason this function must be called in the main thread (rather than initializing asynchronously in a separate
|
|
* thread) is because different platforms have different rules about creating a share context with a context that
|
|
* is still "current" in another thread. While some implementations do allow this, Windows OpenGL (wgl) explicitly
|
|
* forbids it and other platforms/drivers will segfault attempting it. While we can obviously call "doneCurrent", I
|
|
* haven't found any reliable way to prevent the main thread from making it current again before initialization is
|
|
* complete other than blocking it entirely.
|
|
*
|
|
* To get around this, we create all share contexts in the main thread and then move them to the other thread
|
|
* afterwards (which is completely legal). While annoying, this gets around the issue listed above by both preventing
|
|
* the main thread from using the context during initialization and preventing more than one shared context being made
|
|
* at the same time (which may or may not actually make a difference).
|
|
*/
|
|
virtual bool InitInternal() override;
|
|
|
|
virtual void CloseInternal() override;
|
|
|
|
virtual void FrameToValue(StreamPtr stream, FramePtr frame, NodeValueTable* table) override;
|
|
|
|
virtual void RunNodeAccelerated(const Node *node, const TimeRange &range, const NodeValueDatabase *input_params, NodeValueTable* output_params) override;
|
|
|
|
virtual void TextureToBuffer(const QVariant& texture, QByteArray& buffer) override;
|
|
|
|
virtual void ParametersChangedEvent() override;
|
|
|
|
private:
|
|
QOpenGLContext* share_ctx_;
|
|
|
|
QOpenGLContext* ctx_;
|
|
QOffscreenSurface surface_;
|
|
|
|
QOpenGLFunctions* functions_;
|
|
|
|
OpenGLFramebuffer buffer_;
|
|
|
|
OpenGLShaderCache* shader_cache_;
|
|
|
|
OpenGLTextureCache* texture_cache_;
|
|
|
|
private slots:
|
|
void FinishInit();
|
|
|
|
};
|
|
|
|
#endif // OPENGLPROCESSOR_H
|