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| author | Michael Dominic K <mdk@codethink.co.uk> | 2010-08-27 07:28:40 (GMT) |
|---|---|---|
| committer | Samuel Rødal <samuel.rodal@nokia.com> | 2010-08-31 08:15:42 (GMT) |
| commit | 34d0cd1e65644970d890e52bd3c880fc941d99f9 (patch) | |
| tree | 1944351b30cffcd623c88bc339c36355198b183e /src/opengl | |
| parent | 63aa8c467941cf6cb19fc6fcad5c0efde0b53216 (diff) | |
| download | Qt-34d0cd1e65644970d890e52bd3c880fc941d99f9.zip Qt-34d0cd1e65644970d890e52bd3c880fc941d99f9.tar.gz Qt-34d0cd1e65644970d890e52bd3c880fc941d99f9.tar.bz2 | |
Clear the QGLWindowSurface in ::beginPaint when needed.
Merge-request: 2462
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
Diffstat (limited to 'src/opengl')
| -rw-r--r-- | src/opengl/qwindowsurface_gl.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp index b86fb78..d602000 100644 --- a/src/opengl/qwindowsurface_gl.cpp +++ b/src/opengl/qwindowsurface_gl.cpp @@ -426,6 +426,20 @@ static void drawTexture(const QRectF &rect, GLuint tex_id, const QSize &texSize, void QGLWindowSurface::beginPaint(const QRegion &) { + if (! context()) + return; + + int clearFlags = 0; + + if (context()->d_func()->workaround_needsFullClearOnEveryFrame) + clearFlags = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT; + else if (context()->format().alpha()) + clearFlags = GL_COLOR_BUFFER_BIT; + + if (clearFlags) { + glClearColor(0.0, 0.0, 0.0, 0.0); + glClear(clearFlags); + } } void QGLWindowSurface::endPaint(const QRegion &rgn) |