Commit ca5b49a2ec0ee9d7030b8d03b561717addd3441f

Jason McDonald <jason.mcdonald @no…a.com> (Committer)
Tue Oct 13 15:23:05 GMT 2009
gunnar (Author)
Tue Oct 13 08:18:59 UTC 2009

Tree SHA1: 36f556b
Parent SHA1: c59eff4 (Add known issues wiki to docs.)
raw diff | raw patch

Work around broken ATI X1600 drivers on Mac OS X

The GLSL implementation messes up return values from functions so that
all our srcPixel()'s become black and several matrices are off. We
don't want to rewrite the shader code to fit an "ancient" graphics
card, so we simply fall back to the GL 1 engine.

Reviewed-by: Trond
(cherry picked from commit 33ed3d0bacddce214a43be60eb6481903e753a88)
(cherry picked from commit bd94c6df873ab196e537f5a49b57c86ccd66ad90)

Diff rendering mode:
inline
side by side


150	150	class QGLEngineSelector
151	151	{
152	152	public:
153		QGLEngineSelector() : engineType(QPaintEngine::MaxUser) { }
	153	QGLEngineSelector() : engineType(QPaintEngine::MaxUser)
	154	{
	155	#ifdef Q_WS_MAC
	156	// The ATI X1600 driver for Mac OS X does not support return
	157	// values from functions in GLSL. Since working around this in
	158	// the GL2 engine would require a big, ugly rewrite, we're
	159	// falling back to the GL 1 engine..
	160	QGLWidget *tmp = 0;
	161	if (!QGLContext::currentContext()) {
	162	tmp = new QGLWidget();
	163	tmp->makeCurrent();
	164	}
	165	if (strstr((char *) glGetString(GL_RENDERER), "X1600"))
	166	setPreferredPaintEngine(QPaintEngine::OpenGL);
	167	if (tmp)
	168	delete tmp;
	169	#endif
	170
	171	}
154	172
155	173	void setPreferredPaintEngine(QPaintEngine::Type type) {
156	174	if (type == QPaintEngine::OpenGL \|\| type == QPaintEngine::OpenGL2)

Commit ca5b49a2ec0ee9d7030b8d03b561717addd3441f

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