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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef INCLUDED_VCL_OPENGL_OPENGLCONTEXT_HXX
#define INCLUDED_VCL_OPENGL_OPENGLCONTEXT_HXX
#include <epoxy/gl.h>
#include <vcl/dllapi.h>
#include <vcl/syschild.hxx>
#include <rtl/ref.hxx>
#include <memory>
#include <unordered_map>
class OpenGLFramebuffer;
class OpenGLProgram;
class OpenGLTexture;
class RenderState;
/// Holds the information of our new child window
struct VCL_DLLPUBLIC GLWindow
{
unsigned int Width;
unsigned int Height;
bool bMultiSampleSupported;
GLWindow()
: Width(0)
, Height(0)
, bMultiSampleSupported(false)
{
}
virtual bool Synchronize(bool bOnoff) const;
virtual ~GLWindow();
};
struct VCL_DLLPUBLIC OpenGLCapabilitySwitch
{
bool mbLimitedShaderRegisters;
OpenGLCapabilitySwitch()
: mbLimitedShaderRegisters(false)
{}
};
class VCL_DLLPUBLIC OpenGLContext
{
friend class OpenGLTests;
protected:
OpenGLContext();
public:
static rtl::Reference<OpenGLContext> Create();
virtual ~OpenGLContext();
void acquire() { mnRefCount++; }
void release() { if ( --mnRefCount == 0 ) delete this; }
void dispose();
void requestLegacyContext();
bool init(vcl::Window* pParent);
void reset();
// use these methods right after setting a context to make sure drawing happens
// in the right FBO (default one is for onscreen painting)
void BindFramebuffer( OpenGLFramebuffer* pFramebuffer );
void AcquireDefaultFramebuffer();
OpenGLFramebuffer* AcquireFramebuffer( const OpenGLTexture& rTexture );
static void ReleaseFramebuffer( OpenGLFramebuffer* pFramebuffer );
void UnbindTextureFromFramebuffers( GLuint nTexture );
static bool IsTextureAttachedAnywhere( GLuint nTexture );
void ReleaseFramebuffer( const OpenGLTexture& rTexture );
void ReleaseFramebuffers();
// retrieve a program from the cache or compile/link it
OpenGLProgram* GetProgram( const OUString& rVertexShader, const OUString& rFragmentShader, const OString& preamble = "" );
OpenGLProgram* UseProgram( const OUString& rVertexShader, const OUString& rFragmentShader, const OString& preamble = "" );
RenderState& state()
{
return *mpRenderState;
}
OpenGLCapabilitySwitch& getOpenGLCapabilitySwitch()
{
return maOpenGLCapabilitySwitch;
}
/// Is this GL context the current context ?
virtual bool isCurrent();
/// Is any GL context the current context ?
virtual bool isAnyCurrent();
/// release bound resources from the current context
static void clearCurrent();
/// release contexts etc. before (potentially) allowing another thread run.
static void prepareForYield();
/// Is there a current GL context ?
static bool hasCurrent();
/// make a VCL context (any context) current, create it if necessary.
static void makeVCLCurrent();
/// fetch any VCL context, creating one if bMakeIfNecessary is set.
static rtl::Reference<OpenGLContext> getVCLContext(bool bMakeIfNecessary = true);
/// make this GL context current - so it is implicit in subsequent GL calls
virtual void makeCurrent();
/// Put this GL context to the end of the context list.
void registerAsCurrent();
/// reset the GL context so this context is not implicit in subsequent GL calls.
virtual void resetCurrent();
/// unbind the GL_FRAMEBUFFER to its default state, needed for gtk3
virtual void restoreDefaultFramebuffer();
virtual void swapBuffers();
virtual void sync();
void show();
void setWinPosAndSize(const Point &rPos, const Size& rSize);
virtual const GLWindow& getOpenGLWindow() const = 0;
SystemChildWindow* getChildWindow();
const SystemChildWindow* getChildWindow() const;
bool isInitialized() const
{
return mbInitialized;
}
/// VCL promiscuously re-uses its own contexts:
void setVCLOnly() { mbVCLOnly = true; }
bool isVCLOnly() const { return mbVCLOnly; }
virtual SystemWindowData generateWinData(vcl::Window* pParent, bool bRequestLegacyContext);
private:
virtual void initWindow();
virtual void destroyCurrentContext();
virtual void adjustToNewSize();
protected:
bool InitGL();
static void InitGLDebugging();
static void InitChildWindow(SystemChildWindow *pChildWindow);
static void BuffersSwapped();
virtual GLWindow& getModifiableOpenGLWindow() = 0;
virtual bool ImplInit();
VclPtr<vcl::Window> m_xWindow;
VclPtr<vcl::Window> mpWindow; //points to m_pWindow or the parent window, don't delete it
VclPtr<SystemChildWindow> m_pChildWindow;
bool mbInitialized;
int mnRefCount;
bool mbRequestLegacyContext;
bool mbVCLOnly;
int mnFramebufferCount;
OpenGLFramebuffer* mpCurrentFramebuffer;
OpenGLFramebuffer* mpFirstFramebuffer;
OpenGLFramebuffer* mpLastFramebuffer;
OpenGLCapabilitySwitch maOpenGLCapabilitySwitch;
private:
typedef std::unordered_map< OString, std::shared_ptr<OpenGLProgram> > ProgramCollection;
ProgramCollection maPrograms;
OpenGLProgram* mpCurrentProgram;
std::unique_ptr<RenderState> mpRenderState;
public:
vcl::Region maClipRegion;
// Don't hold references to ourselves:
OpenGLContext *mpPrevContext;
OpenGLContext *mpNextContext;
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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