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authorEskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>2010-10-28 07:27:24 (GMT)
committerEskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>2010-10-29 10:07:24 (GMT)
commitc76f9f15d1c604cdf3d68d2147a4a06d227871fa (patch)
treeb92a53c12a38e7f8282ce92d47ea80c1510dd6b9 /src/opengl/gl2paintengineex
parentcb2a108d79b09ec6ea91106e7f33826dceac4a42 (diff)
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Fix possible crash in QStaticText and QDeclarativeTextLayout
The QStaticTextItem held an uncounted reference to QFontEngine. The pointer would dangle in some cases where there was no font object referencing the engine and the cache was cleaned out (e.g. when a new application font is added.) Properly count the reference, and also add reference counting to userData to make it harder to shoot yourself in the foot, since the QStaticTextItem class is now being used in different places, Task-number: QTBUG-14446 Reviewed-by: Martin Jones
Diffstat (limited to 'src/opengl/gl2paintengineex')
-rw-r--r--src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp24
1 files changed, 12 insertions, 12 deletions
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
index 84c7fed..1dcb773 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
@@ -1350,8 +1350,8 @@ void QGL2PaintEngineEx::drawStaticTextItem(QStaticTextItem *textItem)
ensureActive();
- QFontEngineGlyphCache::Type glyphType = textItem->fontEngine->glyphFormat >= 0
- ? QFontEngineGlyphCache::Type(textItem->fontEngine->glyphFormat)
+ QFontEngineGlyphCache::Type glyphType = textItem->fontEngine()->glyphFormat >= 0
+ ? QFontEngineGlyphCache::Type(textItem->fontEngine()->glyphFormat)
: d->glyphCacheType;
if (glyphType == QFontEngineGlyphCache::Raster_RGBMask) {
if (d->device->alphaRequested() || state()->matrix.type() > QTransform::TxTranslate
@@ -1430,7 +1430,7 @@ void QGL2PaintEngineEx::drawTextItem(const QPointF &p, const QTextItem &textItem
{
QStaticTextItem staticTextItem;
staticTextItem.chars = const_cast<QChar *>(ti.chars);
- staticTextItem.fontEngine = ti.fontEngine;
+ staticTextItem.setFontEngine(ti.fontEngine);
staticTextItem.glyphs = glyphs.data();
staticTextItem.numChars = ti.num_chars;
staticTextItem.numGlyphs = glyphs.size();
@@ -1475,18 +1475,18 @@ void QGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type glyp
QOpenGL2PaintEngineState *s = q->state();
QGLTextureGlyphCache *cache =
- (QGLTextureGlyphCache *) staticTextItem->fontEngine->glyphCache(ctx, glyphType, QTransform());
+ (QGLTextureGlyphCache *) staticTextItem->fontEngine()->glyphCache(ctx, glyphType, QTransform());
if (!cache || cache->cacheType() != glyphType) {
cache = new QGLTextureGlyphCache(ctx, glyphType, QTransform());
- staticTextItem->fontEngine->setGlyphCache(ctx, cache);
+ staticTextItem->fontEngine()->setGlyphCache(ctx, cache);
}
bool recreateVertexArrays = false;
if (staticTextItem->userDataNeedsUpdate)
recreateVertexArrays = true;
- else if (staticTextItem->userData == 0)
+ else if (staticTextItem->userData() == 0)
recreateVertexArrays = true;
- else if (staticTextItem->userData->type != QStaticTextUserData::OpenGLUserData)
+ else if (staticTextItem->userData()->type != QStaticTextUserData::OpenGLUserData)
recreateVertexArrays = true;
// We only need to update the cache with new glyphs if we are actually going to recreate the vertex arrays.
@@ -1494,8 +1494,8 @@ void QGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type glyp
// cache so this text is performed before we test if the cache size has changed.
if (recreateVertexArrays) {
cache->setPaintEnginePrivate(this);
- cache->populate(staticTextItem->fontEngine, staticTextItem->numGlyphs, staticTextItem->glyphs,
- staticTextItem->glyphPositions);
+ cache->populate(staticTextItem->fontEngine(), staticTextItem->numGlyphs,
+ staticTextItem->glyphs, staticTextItem->glyphPositions);
}
if (cache->width() == 0 || cache->height() == 0)
@@ -1515,14 +1515,14 @@ void QGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type glyp
if (staticTextItem->useBackendOptimizations) {
QOpenGLStaticTextUserData *userData = 0;
- if (staticTextItem->userData == 0
- || staticTextItem->userData->type != QStaticTextUserData::OpenGLUserData) {
+ if (staticTextItem->userData() == 0
+ || staticTextItem->userData()->type != QStaticTextUserData::OpenGLUserData) {
userData = new QOpenGLStaticTextUserData();
staticTextItem->setUserData(userData);
} else {
- userData = static_cast<QOpenGLStaticTextUserData*>(staticTextItem->userData);
+ userData = static_cast<QOpenGLStaticTextUserData*>(staticTextItem->userData());
}
// Use cache if backend optimizations is turned on