mirror of
https://github.com/crystalidea/qt6windows7.git
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213 lines
7.0 KiB
C
213 lines
7.0 KiB
C
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// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
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#ifndef QWINDOWSGLCONTEXT_H
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#define QWINDOWSGLCONTEXT_H
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#include <QtCore/qt_windows.h>
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#include "qwindowsopenglcontext.h"
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#include <QtGui/qopenglcontext.h>
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#include <vector>
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QT_BEGIN_NAMESPACE
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#ifndef QT_NO_OPENGL
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class QDebug;
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enum QWindowsGLFormatFlags
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{
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QWindowsGLDirectRendering = 0x1,
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QWindowsGLOverlay = 0x2,
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QWindowsGLRenderToPixmap = 0x4,
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QWindowsGLAccumBuffer = 0x8
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};
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// Additional format information for Windows.
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struct QWindowsOpenGLAdditionalFormat
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{
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QWindowsOpenGLAdditionalFormat(unsigned formatFlagsIn = 0, unsigned pixmapDepthIn = 0) :
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formatFlags(formatFlagsIn), pixmapDepth(pixmapDepthIn) { }
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unsigned formatFlags; // QWindowsGLFormatFlags.
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unsigned pixmapDepth; // for QWindowsGLRenderToPixmap
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};
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// Per-window data for active OpenGL contexts.
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struct QOpenGLContextData
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{
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QOpenGLContextData(HGLRC r, HWND h, HDC d) : renderingContext(r), hwnd(h), hdc(d) {}
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QOpenGLContextData() {}
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HGLRC renderingContext = nullptr;
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HWND hwnd = nullptr;
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HDC hdc = nullptr;
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};
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class QOpenGLStaticContext;
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struct QWindowsOpenGLContextFormat
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{
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static QWindowsOpenGLContextFormat current();
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void apply(QSurfaceFormat *format) const;
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QSurfaceFormat::OpenGLContextProfile profile = QSurfaceFormat::NoProfile;
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int version = 0; //! majorVersion<<8 + minorVersion
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QSurfaceFormat::FormatOptions options;
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};
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#ifndef QT_NO_DEBUG_STREAM
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QDebug operator<<(QDebug d, const PIXELFORMATDESCRIPTOR &);
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QDebug operator<<(QDebug d, const QWindowsOpenGLContextFormat &);
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QDebug operator<<(QDebug d, const QOpenGLStaticContext &s);
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#endif
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struct QWindowsOpengl32DLL
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{
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bool init(bool softwareRendering);
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void *moduleHandle() const { return m_lib; }
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bool moduleIsNotOpengl32() const { return m_nonOpengl32; }
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// Wrappers. Always use these instead of SwapBuffers/wglSwapBuffers/etc.
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BOOL swapBuffers(HDC dc);
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BOOL setPixelFormat(HDC dc, int pf, const PIXELFORMATDESCRIPTOR *pfd);
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int describePixelFormat(HDC dc, int pf, UINT size, PIXELFORMATDESCRIPTOR *pfd);
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// WGL
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HGLRC (WINAPI * wglCreateContext)(HDC dc);
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BOOL (WINAPI * wglDeleteContext)(HGLRC context);
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HGLRC (WINAPI * wglGetCurrentContext)();
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HDC (WINAPI * wglGetCurrentDC)();
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PROC (WINAPI * wglGetProcAddress)(LPCSTR name);
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BOOL (WINAPI * wglMakeCurrent)(HDC dc, HGLRC context);
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BOOL (WINAPI * wglShareLists)(HGLRC context1, HGLRC context2);
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// GL1+GLES2 common
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GLenum (APIENTRY * glGetError)();
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void (APIENTRY * glGetIntegerv)(GLenum pname, GLint* params);
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const GLubyte * (APIENTRY * glGetString)(GLenum name);
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QFunctionPointer resolve(const char *name);
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private:
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HMODULE m_lib;
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bool m_nonOpengl32;
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// For Mesa llvmpipe shipped with a name other than opengl32.dll
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BOOL (WINAPI * wglSwapBuffers)(HDC dc);
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BOOL (WINAPI * wglSetPixelFormat)(HDC dc, int pf, const PIXELFORMATDESCRIPTOR *pfd);
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int (WINAPI * wglDescribePixelFormat)(HDC dc, int pf, UINT size, PIXELFORMATDESCRIPTOR *pfd);
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};
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class QOpenGLStaticContext : public QWindowsStaticOpenGLContext
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{
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Q_DISABLE_COPY_MOVE(QOpenGLStaticContext)
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QOpenGLStaticContext();
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public:
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enum Extensions
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{
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SampleBuffers = 0x1,
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sRGBCapableFramebuffer = 0x2,
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Robustness = 0x4,
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};
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typedef bool
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(APIENTRY *WglGetPixelFormatAttribIVARB)
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(HDC hdc, int iPixelFormat, int iLayerPlane,
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uint nAttributes, const int *piAttributes, int *piValues);
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typedef bool
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(APIENTRY *WglChoosePixelFormatARB)(HDC hdc, const int *piAttribList,
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const float *pfAttribFList, uint nMaxFormats, int *piFormats,
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UINT *nNumFormats);
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typedef HGLRC
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(APIENTRY *WglCreateContextAttribsARB)(HDC, HGLRC, const int *);
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typedef BOOL
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(APIENTRY *WglSwapInternalExt)(int interval);
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typedef int
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(APIENTRY *WglGetSwapInternalExt)(void);
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typedef const char *
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(APIENTRY *WglGetExtensionsStringARB)(HDC);
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bool hasExtensions() const
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{ return wglGetPixelFormatAttribIVARB && wglChoosePixelFormatARB && wglCreateContextAttribsARB; }
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static QOpenGLStaticContext *create(bool softwareRendering = false);
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static QByteArray getGlString(unsigned int which);
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QWindowsOpenGLContext *createContext(QOpenGLContext *context) override;
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QWindowsOpenGLContext *createContext(HGLRC context, HWND window) override;
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void *moduleHandle() const override { return opengl32.moduleHandle(); }
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QOpenGLContext::OpenGLModuleType moduleType() const override
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{ return QOpenGLContext::LibGL; }
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// For a regular opengl32.dll report the ThreadedOpenGL capability.
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// For others, which are likely to be software-only, don't.
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bool supportsThreadedOpenGL() const override
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{ return !opengl32.moduleIsNotOpengl32(); }
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const QByteArray vendor;
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const QByteArray renderer;
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const QByteArray extensionNames;
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unsigned extensions;
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const QWindowsOpenGLContextFormat defaultFormat;
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WglGetPixelFormatAttribIVARB wglGetPixelFormatAttribIVARB;
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WglChoosePixelFormatARB wglChoosePixelFormatARB;
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WglCreateContextAttribsARB wglCreateContextAttribsARB;
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WglSwapInternalExt wglSwapInternalExt;
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WglGetSwapInternalExt wglGetSwapInternalExt;
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WglGetExtensionsStringARB wglGetExtensionsStringARB;
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static QWindowsOpengl32DLL opengl32;
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};
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class QWindowsGLContext : public QWindowsOpenGLContext, public QNativeInterface::QWGLContext
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{
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public:
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explicit QWindowsGLContext(QOpenGLStaticContext *staticContext, QOpenGLContext *context);
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explicit QWindowsGLContext(QOpenGLStaticContext *staticContext, HGLRC context, HWND window);
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~QWindowsGLContext() override;
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bool isSharing() const override { return context()->shareHandle(); }
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bool isValid() const override { return m_renderingContext && !m_lost; }
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QSurfaceFormat format() const override { return m_obtainedFormat; }
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void swapBuffers(QPlatformSurface *surface) override;
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bool makeCurrent(QPlatformSurface *surface) override;
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void doneCurrent() override;
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typedef void (*GL_Proc) ();
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QFunctionPointer getProcAddress(const char *procName) override;
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HGLRC renderingContext() const { return m_renderingContext; }
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HGLRC nativeContext() const override { return m_renderingContext; }
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private:
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typedef GLenum (APIENTRY *GlGetGraphicsResetStatusArbType)();
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inline void releaseDCs();
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bool updateObtainedParams(HDC hdc, int *obtainedSwapInterval = nullptr);
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QOpenGLStaticContext *m_staticContext = nullptr;
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QSurfaceFormat m_obtainedFormat;
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HGLRC m_renderingContext = nullptr;
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std::vector<QOpenGLContextData> m_windowContexts;
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PIXELFORMATDESCRIPTOR m_obtainedPixelFormatDescriptor;
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int m_pixelFormat = 0;
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bool m_extensionsUsed = false;
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int m_swapInterval = -1;
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bool m_ownsContext = true;
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GlGetGraphicsResetStatusArbType m_getGraphicsResetStatus = nullptr;
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bool m_lost = false;
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};
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#endif
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QT_END_NAMESPACE
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#endif // QWINDOWSGLCONTEXT_H
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