From 3fb5fce61b6f64534ad292a78250e4256a6514b6 Mon Sep 17 00:00:00 2001 From: Robin Burchell Date: Thu, 17 Mar 2011 18:32:58 +0100 Subject: Changes to driver workarounds. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - Force enable brokenFBOReadBack on non-Nokia v1.4 SGX drivers (as this is apparantly not fixed, except on the Nokia drivers) - Add debug when workarounds are enabled to ease debugging This fixes the following MeeGo bug: https://bugs.meego.com/show_bug.cgi?id=5616 Merge-request: 1144 Reviewed-by: Samuel Rødal --- src/opengl/qgl_egl.cpp | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/src/opengl/qgl_egl.cpp b/src/opengl/qgl_egl.cpp index 674d80d..d6b2d3b 100644 --- a/src/opengl/qgl_egl.cpp +++ b/src/opengl/qgl_egl.cpp @@ -39,6 +39,7 @@ ** ****************************************************************************/ +#include #include #include #include "qgl_p.h" @@ -195,6 +196,7 @@ void QGLContext::makeCurrent() // PowerVR MBX/SGX chips needs to clear all buffers when starting to render // a new frame, otherwise there will be a performance penalty to pay for // each frame. + qDebug() << "Found SGX/MBX driver, enabling FullClearOnEveryFrame"; d->workaround_needsFullClearOnEveryFrame = true; // Older PowerVR SGX drivers (like the one in the N900) have a @@ -202,10 +204,31 @@ void QGLContext::makeCurrent() // or GL_ALPHA texture bound to an FBO. The only way to // identify that driver is to check the EGL version number for it. const char *egl_version = eglQueryString(d->eglContext->display(), EGL_VERSION); - if (egl_version && strstr(egl_version, "1.3")) + + if (egl_version && strstr(egl_version, "1.3")) { + qDebug() << "Found v1.3 driver, enabling brokenFBOReadBack"; d->workaround_brokenFBOReadBack = true; - else if (egl_version && strstr(egl_version, "1.4")) + } else if (egl_version && strstr(egl_version, "1.4")) { + qDebug() << "Found v1.4 driver, enabling brokenTexSubImage"; d->workaround_brokenTexSubImage = true; + + // this is a bit complicated; 1.4 version SGX drivers from + // Nokia have fixed the brokenFBOReadBack problem, but + // official drivers from TI haven't, meaning that things + // like the beagleboard are broken unless we hack around it + // - but at the same time, we want to not reduce performance + // by not enabling this elsewhere. + // + // so, let's check for a Nokia-specific addon, and only + // enable if it isn't present. + // (see MeeGo bug #5616) + if (!QEgl::hasExtension("EGL_NOK_image_shared")) { + // no Nokia extension, this is probably a standard SGX + // driver, so enable the workaround + qDebug() << "Found non-Nokia v1.4 driver, enabling brokenFBOReadBack"; + d->workaround_brokenFBOReadBack = true; + } + } } } } -- cgit v0.12