Merge branch '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.6-integration

* '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2:
  Fix rules for recreating the Makefile in a subdir
  Disable some tests that require high floating point precision.
  Replace the truncate function with fuzzierCompare().
  Rework how Qt handles GL extensions.
  More changelog additions for QtWebKit
  Make compile on symbian/Linux
  Removed pointless image comparison in raster colorize filter.
  Improved performance of translating device coordinate graphics effects.

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