void KisOpenGL::initialize()
{
if (initialized) return;
setDefaultFormat();
// we need a QSurface active to get our GL functions from the context
QWindow surface;
surface.setSurfaceType( QSurface::OpenGLSurface );
surface.create();
QOpenGLContext context;
context.create();
context.makeCurrent( &surface );
QOpenGLFunctions *funcs = context.functions();
funcs->initializeOpenGLFunctions();
qDebug() << "OpenGL Info";
qDebug() << " Vendor: " << reinterpret_cast<const char *>(funcs->glGetString(GL_VENDOR));
qDebug() << " Renderer: " << reinterpret_cast<const char *>(funcs->glGetString(GL_RENDERER));
qDebug() << " Version: " << reinterpret_cast<const char *>(funcs->glGetString(GL_VERSION));
qDebug() << " Shading language: " << reinterpret_cast<const char *>(funcs->glGetString(GL_SHADING_LANGUAGE_VERSION));
qDebug() << " Requested format: " << QSurfaceFormat::defaultFormat();
qDebug() << " Current format: " << context.format();
glMajorVersion = context.format().majorVersion();
glMinorVersion = context.format().minorVersion();
supportsDeprecatedFunctions = (context.format().options() & QSurfaceFormat::DeprecatedFunctions);
initialized = true;
}
void KisOpenGL::initializeContext(QOpenGLContext *ctx)
{
initialize();
dbgUI << "OpenGL: Opening new context";
// Double check we were given the version we requested
QSurfaceFormat format = ctx->format();
QOpenGLFunctions *f = ctx->functions();
f->initializeOpenGLFunctions();
#ifndef GL_RENDERER
# define GL_RENDERER 0x1F01
#endif
Renderer = QString((const char*)f->glGetString(GL_RENDERER));
QFile log(QDesktopServices::storageLocation(QDesktopServices::TempLocation) + "/krita-opengl.txt");
log.open(QFile::WriteOnly);
QString vendor((const char*)f->glGetString(GL_VENDOR));
log.write(vendor.toLatin1());
log.write(", ");
log.write(Renderer.toLatin1());
log.write(", ");
QString version((const char*)f->glGetString(GL_VERSION));
log.write(version.toLatin1());
log.close();
// Check if we have a bugged driver that needs fence workaround
bool isOnX11 = false;
#ifdef HAVE_X11
isOnX11 = true;
#endif
KisConfig cfg;
if ((isOnX11 && Renderer.startsWith("AMD")) || cfg.forceOpenGLFenceWorkaround()) {
NeedsFenceWorkaround = true;
}
}