diff options
Diffstat (limited to 'src/opengl/qgl_p.h')
| -rw-r--r-- | src/opengl/qgl_p.h | 95 |
1 files changed, 59 insertions, 36 deletions
diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h index 30f5591..0104f07 100644 --- a/src/opengl/qgl_p.h +++ b/src/opengl/qgl_p.h @@ -261,6 +261,60 @@ private: // "ctx" is destroyed. Returns null if nothing is sharing with ctx. Q_OPENGL_EXPORT const QGLContext *qt_gl_transfer_context(const QGLContext *); +// GL extension definitions +class QGLExtensions { +public: + enum Extension { + TextureRectangle = 0x00000001, + SampleBuffers = 0x00000002, + GenerateMipmap = 0x00000004, + TextureCompression = 0x00000008, + FragmentProgram = 0x00000010, + MirroredRepeat = 0x00000020, + FramebufferObject = 0x00000040, + StencilTwoSide = 0x00000080, + StencilWrap = 0x00000100, + PackedDepthStencil = 0x00000200, + NVFloatBuffer = 0x00000400, + PixelBufferObject = 0x00000800, + FramebufferBlit = 0x00001000, + NPOTTextures = 0x00002000, + BGRATextureFormat = 0x00004000, + DDSTextureCompression = 0x00008000, + ETC1TextureCompression = 0x00010000, + PVRTCTextureCompression = 0x00020000, + FragmentShader = 0x00040000 + }; + Q_DECLARE_FLAGS(Extensions, Extension) + + static Extensions glExtensions(); + +private: + static Extensions currentContextExtensions(); +}; + +/* + QGLTemporaryContext - the main objective of this class is to have a way of + creating a GL context and making it current, without going via QGLWidget + and friends. At certain points during GL initialization we need a current + context in order decide what GL features are available, and to resolve GL + extensions. Having a light-weight way of creating such a context saves + initial application startup time, and it doesn't wind up creating recursive + conflicts. + The class currently uses a private d pointer to hide the platform specific + types. This could possibly been done inline with #ifdef'ery, but it causes + major headaches on e.g. X11 due to namespace pollution. +*/ +class QGLTemporaryContextPrivate; +class QGLTemporaryContext { +public: + QGLTemporaryContext(bool directRendering = true, QWidget *parent = 0); + ~QGLTemporaryContext(); + +private: + QScopedPointer<QGLTemporaryContextPrivate> d; +}; + class QGLTexture; // This probably needs to grow to GL_MAX_VERTEX_ATTRIBS, but 3 is ok for now as that's @@ -333,10 +387,12 @@ public: uint crWin : 1; uint internal_context : 1; uint version_flags_cached : 1; + uint extension_flags_cached : 1; QPaintDevice *paintDevice; QColor transpColor; QGLContext *q_ptr; QGLFormat::OpenGLVersionFlags version_flags; + QGLExtensions::Extensions extension_flags; QGLContextGroup *group; GLint max_texture_size; @@ -375,41 +431,8 @@ Q_SIGNALS: void aboutToDestroyContext(const QGLContext *context); }; -// GL extension definitions -class QGLExtensions { -public: - enum Extension { - TextureRectangle = 0x00000001, - SampleBuffers = 0x00000002, - GenerateMipmap = 0x00000004, - TextureCompression = 0x00000008, - FragmentProgram = 0x00000010, - MirroredRepeat = 0x00000020, - FramebufferObject = 0x00000040, - StencilTwoSide = 0x00000080, - StencilWrap = 0x00000100, - PackedDepthStencil = 0x00000200, - NVFloatBuffer = 0x00000400, - PixelBufferObject = 0x00000800, - FramebufferBlit = 0x00001000, - NPOTTextures = 0x00002000, - BGRATextureFormat = 0x00004000, - DDSTextureCompression = 0x00008000, - ETC1TextureCompression = 0x00010000, - PVRTCTextureCompression = 0x00020000, - FragmentShader = 0x00040000 - }; - Q_DECLARE_FLAGS(Extensions, Extension) - - static Extensions glExtensions; - static bool nvidiaFboNeedsFinish; - static void init(); // sys dependent - static void init_extensions(); // general: called by init() -}; - Q_DECLARE_OPERATORS_FOR_FLAGS(QGLExtensions::Extensions) - // Temporarily make a context current if not already current or // shared with the current contex. The previous context is made // current when the object goes out of scope. @@ -533,7 +556,7 @@ bool qt_gl_preferGL2Engine(); inline GLenum qt_gl_preferredTextureFormat() { - return (QGLExtensions::glExtensions & QGLExtensions::BGRATextureFormat) && QSysInfo::ByteOrder == QSysInfo::LittleEndian + return (QGLExtensions::glExtensions() & QGLExtensions::BGRATextureFormat) && QSysInfo::ByteOrder == QSysInfo::LittleEndian ? GL_BGRA : GL_RGBA; } @@ -542,7 +565,7 @@ inline GLenum qt_gl_preferredTextureTarget() #if defined(QT_OPENGL_ES_2) return GL_TEXTURE_2D; #else - return (QGLExtensions::glExtensions & QGLExtensions::TextureRectangle) + return (QGLExtensions::glExtensions() & QGLExtensions::TextureRectangle) && !qt_gl_preferGL2Engine() ? GL_TEXTURE_RECTANGLE_NV : GL_TEXTURE_2D; @@ -614,7 +637,7 @@ private: }; -// This class can be used to match GL extensions with doing any mallocs. The +// This class can be used to match GL extensions without doing any mallocs. The // class assumes that the GL extension string ends with a space character, // which it should do on all conformant platforms. Create the object and pass // in a pointer to the extension string, then call match() on each extension |