Remove reference to OpenGL from distance field cache superclass

QSGDefaultDistanceFieldGlyphCache is the OpenGL-specific implementation,
but for some reason the core profile flag was stored in the superclass.
It is ever only used from QSGDefaultDistanceFieldGlyphCache and the
rest of the superclass has no OpenGL-dependency, so we just move it.

This is needed to be able to share the generic QSGDistanceFieldGlyphCache
with Qt 3D Runtime, where there is no current OpenGL context when the
scene graph is built and resources have to be allocated through an
abstraction layer in Qt 3D.

Task-number: QT3DS-1419
Change-Id: I7f4e26eecc21635ff81030b32ecc89c6dc4fcfbe
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

4 files changed, 7 insertions, 15 deletions

diff --git a/src/quick/scenegraph/qsgadaptationlayer.cpp b/src/quick/scenegraph/qsgadaptationlayer.cpp
index c99e149aa5..252e5a9c55 100644
--- a/src/quick/scenegraph/qsgadaptationlayer.cpp
+++ b/src/quick/scenegraph/qsgadaptationlayer.cpp
@@ -56,7 +56,7 @@ static QElapsedTimer qsg_render_timer;
 
 QSGDistanceFieldGlyphCache::Texture QSGDistanceFieldGlyphCache::s_emptyTexture;
 
-QSGDistanceFieldGlyphCache::QSGDistanceFieldGlyphCache(QOpenGLContext *c, const QRawFont &font)
+QSGDistanceFieldGlyphCache::QSGDistanceFieldGlyphCache(const QRawFont &font)
     : m_pendingGlyphs(64)
 {
     Q_ASSERT(font.isValid());
@@ -71,11 +71,6 @@ QSGDistanceFieldGlyphCache::QSGDistanceFieldGlyphCache(QOpenGLContext *c, const
     // this allows us to call pathForGlyph once and reuse the result.
     m_referenceFont.setPixelSize(QT_DISTANCEFIELD_BASEFONTSIZE(m_doubleGlyphResolution) * QT_DISTANCEFIELD_SCALE(m_doubleGlyphResolution));
     Q_ASSERT(m_referenceFont.isValid());
-#if QT_CONFIG(opengl)
-    m_coreProfile = (c->format().profile() == QSurfaceFormat::CoreProfile);
-#else
-    Q_UNUSED(c)
-#endif
 }
 
 QSGDistanceFieldGlyphCache::~QSGDistanceFieldGlyphCache()
diff --git a/src/quick/scenegraph/qsgadaptationlayer_p.h b/src/quick/scenegraph/qsgadaptationlayer_p.h
index ba5c4353b2..58ecae94e7 100644
--- a/src/quick/scenegraph/qsgadaptationlayer_p.h
+++ b/src/quick/scenegraph/qsgadaptationlayer_p.h
@@ -62,7 +62,6 @@
 #include <QtCore/qurl.h>
 #include <private/qfontengine_p.h>
 #include <QtGui/private/qdatabuffer_p.h>
-#include <private/qopenglcontext_p.h>
 #include <private/qdistancefield_p.h>
 #include <private/qintrusivelist_p.h>
 
@@ -75,7 +74,6 @@ class QSGNode;
 class QImage;
 class TextureReference;
 class QSGDistanceFieldGlyphNode;
-class QOpenGLContext;
 class QSGInternalImageNode;
 class QSGPainterNode;
 class QSGInternalRectangleNode;
@@ -413,7 +411,7 @@ typedef QIntrusiveList<QSGDistanceFieldGlyphConsumer, &QSGDistanceFieldGlyphCons
 class Q_QUICK_PRIVATE_EXPORT QSGDistanceFieldGlyphCache
 {
 public:
-    QSGDistanceFieldGlyphCache(QOpenGLContext *c, const QRawFont &font);
+    QSGDistanceFieldGlyphCache(const QRawFont &font);
     virtual ~QSGDistanceFieldGlyphCache();
 
     struct Metrics {
@@ -514,8 +512,6 @@ protected:
     void saveTexture(GLuint textureId, int width, int height) const;
 #endif
 
-    inline bool isCoreProfile() const { return m_coreProfile; }
-
     bool m_doubleGlyphResolution;
 
 protected:
@@ -523,9 +519,6 @@ protected:
 
 private:
     int m_glyphCount;
-
-    bool m_coreProfile;
-
     QList<Texture> m_textures;
     QHash<glyph_t, GlyphData> m_glyphsData;
     QDataBuffer<glyph_t> m_pendingGlyphs;
diff --git a/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache.cpp b/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache.cpp
index ccc57b0b86..8121b4559e 100644
--- a/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache.cpp
+++ b/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache.cpp
@@ -67,7 +67,7 @@ DEFINE_BOOL_CONFIG_OPTION(qsgPreferFullSizeGlyphCacheTextures, QSG_PREFER_FULLSI
 
 QSGDefaultDistanceFieldGlyphCache::QSGDefaultDistanceFieldGlyphCache(QOpenGLContext *c,
                                                                      const QRawFont &font)
-    : QSGDistanceFieldGlyphCache(c, font)
+    : QSGDistanceFieldGlyphCache(font)
     , m_maxTextureSize(0)
     , m_maxTextureCount(3)
     , m_areaAllocator(nullptr)
@@ -89,6 +89,8 @@ QSGDefaultDistanceFieldGlyphCache::QSGDefaultDistanceFieldGlyphCache(QOpenGLCont
         qWarning("Buffer creation failed");
     }
 
+    m_coreProfile = (c->format().profile() == QSurfaceFormat::CoreProfile);
+
     // Load a pregenerated cache if the font contains one
     loadPregeneratedCache(font);
 }
diff --git a/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache_p.h b/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache_p.h
index a0e4387af9..c64adddd91 100644
--- a/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache_p.h
+++ b/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache_p.h
@@ -88,6 +88,7 @@ public:
 
 private:
     bool loadPregeneratedCache(const QRawFont &font);
+    inline bool isCoreProfile() const { return m_coreProfile; }
 
     struct TextureInfo {
         GLuint texture;
@@ -137,6 +138,7 @@ private:
 
     mutable int m_maxTextureSize;
     int m_maxTextureCount;
+    bool m_coreProfile;
 
     QList<TextureInfo> m_textures;
     QHash<glyph_t, TextureInfo *> m_glyphsTexture;