diff options
Diffstat (limited to 'src/opengl/qpaintengine_opengl.cpp')
| -rw-r--r-- | src/opengl/qpaintengine_opengl.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/opengl/qpaintengine_opengl.cpp b/src/opengl/qpaintengine_opengl.cpp index d5bf1dc..e3d8a1d 100644 --- a/src/opengl/qpaintengine_opengl.cpp +++ b/src/opengl/qpaintengine_opengl.cpp @@ -1330,9 +1330,15 @@ bool QOpenGLPaintEngine::begin(QPaintDevice *pdev) d->offscreen.begin(); - const QColor &c = d->drawable.backgroundColor(); - glClearColor(c.redF(), c.greenF(), c.blueF(), d->drawable.format().alpha() ? c.alphaF() : 1.0); if (d->drawable.context()->d_func()->clear_on_painter_begin && d->drawable.autoFillBackground()) { + + if (d->drawable.hasTransparentBackground()) + glClearColor(0.0, 0.0, 0.0, 0.0); + else { + const QColor &c = d->drawable.backgroundColor(); + glClearColor(c.redF(), c.greenF(), c.blueF(), 1.0); + } + GLbitfield clearBits = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT; #ifndef QT_OPENGL_ES clearBits |= GL_ACCUM_BUFFER_BIT; |