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-rw-r--r--src/quick/scenegraph/qsgdefaultdistancefieldglyphcache.cpp40
-rw-r--r--src/quick/scenegraph/qsgdefaultdistancefieldglyphcache_p.h9
2 files changed, 27 insertions, 22 deletions
diff --git a/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache.cpp b/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache.cpp
index 8121b4559e..c51358df7c 100644
--- a/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache.cpp
+++ b/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache.cpp
@@ -68,7 +68,8 @@ DEFINE_BOOL_CONFIG_OPTION(qsgPreferFullSizeGlyphCacheTextures, QSG_PREFER_FULLSI
QSGDefaultDistanceFieldGlyphCache::QSGDefaultDistanceFieldGlyphCache(QOpenGLContext *c,
const QRawFont &font)
: QSGDistanceFieldGlyphCache(font)
- , m_maxTextureSize(0)
+ , m_maxTextureWidth(0)
+ , m_maxTextureHeight(0)
, m_maxTextureCount(3)
, m_areaAllocator(nullptr)
, m_blitProgram(nullptr)
@@ -112,13 +113,23 @@ void QSGDefaultDistanceFieldGlyphCache::requestGlyphs(const QSet<glyph_t> &glyph
QList<GlyphPosition> glyphPositions;
QVector<glyph_t> glyphsToRender;
+ const int padding = QSG_DEFAULT_DISTANCEFIELD_GLYPH_CACHE_PADDING;
+ const qreal scaleFactor = qreal(1) / QT_DISTANCEFIELD_SCALE(m_doubleGlyphResolution);
+
+ if (m_maxTextureHeight == 0) {
+ m_funcs->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &m_maxTextureWidth);
+
+ // We need to add a buffer to avoid glyphs that overlap the border between two
+ // textures causing the height of the textures to extend beyond the limit.
+ m_maxTextureHeight = m_maxTextureWidth - (qCeil(m_referenceFont.pixelSize() * scaleFactor) + distanceFieldRadius() * 2 + padding * 2);
+ }
+
if (m_areaAllocator == nullptr)
- m_areaAllocator = new QSGAreaAllocator(QSize(maxTextureSize(), m_maxTextureCount * maxTextureSize()));
+ m_areaAllocator = new QSGAreaAllocator(QSize(m_maxTextureWidth, m_maxTextureCount * m_maxTextureHeight));
for (QSet<glyph_t>::const_iterator it = glyphs.constBegin(); it != glyphs.constEnd() ; ++it) {
glyph_t glyphIndex = *it;
- int padding = QSG_DEFAULT_DISTANCEFIELD_GLYPH_CACHE_PADDING;
QRectF boundingRect = glyphData(glyphIndex).boundingRect;
int glyphWidth = qCeil(boundingRect.width()) + distanceFieldRadius() * 2;
int glyphHeight = qCeil(boundingRect.height()) + distanceFieldRadius() * 2;
@@ -151,8 +162,8 @@ void QSGDefaultDistanceFieldGlyphCache::requestGlyphs(const QSet<glyph_t> &glyph
continue;
}
- TextureInfo *tex = textureInfo(alloc.y() / maxTextureSize());
- alloc = QRect(alloc.x(), alloc.y() % maxTextureSize(), alloc.width(), alloc.height());
+ TextureInfo *tex = textureInfo(alloc.y() / m_maxTextureHeight);
+ alloc = QRect(alloc.x(), alloc.y() % m_maxTextureHeight, alloc.width(), alloc.height());
tex->allocatedArea |= alloc;
Q_ASSERT(tex->padding == padding || tex->padding < 0);
@@ -539,13 +550,6 @@ bool QSGDefaultDistanceFieldGlyphCache::createFullSizeTextures() const
return qsgPreferFullSizeGlyphCacheTextures() && glyphCount() > QT_DISTANCEFIELD_HIGHGLYPHCOUNT();
}
-int QSGDefaultDistanceFieldGlyphCache::maxTextureSize() const
-{
- if (!m_maxTextureSize)
- m_funcs->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &m_maxTextureSize);
- return m_maxTextureSize;
-}
-
namespace {
struct Qtdf {
// We need these structs to be tightly packed, but some compilers we use do not
@@ -644,7 +648,7 @@ bool QSGDefaultDistanceFieldGlyphCache::loadPregeneratedCache(const QRawFont &fo
}
qreal pixelSize = qreal(Qtdf::fetch<quint16>(qtdfTableStart, Qtdf::pixelSize));
- m_maxTextureSize = Qtdf::fetch<quint32>(qtdfTableStart, Qtdf::textureSize);
+ m_maxTextureWidth = m_maxTextureHeight = Qtdf::fetch<quint32>(qtdfTableStart, Qtdf::textureSize);
m_doubleGlyphResolution = Qtdf::fetch<quint8>(qtdfTableStart, Qtdf::flags) == 1;
padding = Qtdf::fetch<quint8>(qtdfTableStart, Qtdf::headerPadding);
@@ -653,7 +657,7 @@ bool QSGDefaultDistanceFieldGlyphCache::loadPregeneratedCache(const QRawFont &fo
return false;
}
- if (m_maxTextureSize <= 0) {
+ if (m_maxTextureWidth <= 0) {
qWarning("Invalid texture size in '%s'", qPrintable(font.familyName()));
return false;
}
@@ -661,11 +665,11 @@ bool QSGDefaultDistanceFieldGlyphCache::loadPregeneratedCache(const QRawFont &fo
int systemMaxTextureSize;
m_funcs->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &systemMaxTextureSize);
- if (m_maxTextureSize > systemMaxTextureSize) {
+ if (m_maxTextureWidth > systemMaxTextureSize) {
qWarning("System maximum texture size is %d. This is lower than the value in '%s', which is %d",
systemMaxTextureSize,
qPrintable(font.familyName()),
- m_maxTextureSize);
+ m_maxTextureWidth);
}
if (padding != QSG_DEFAULT_DISTANCEFIELD_GLYPH_CACHE_PADDING) {
@@ -688,12 +692,12 @@ bool QSGDefaultDistanceFieldGlyphCache::loadPregeneratedCache(const QRawFont &fo
return false;
}
- if (m_areaAllocator->size().height() % m_maxTextureSize != 0) {
+ if (m_areaAllocator->size().height() % m_maxTextureHeight != 0) {
qWarning("Area allocator size mismatch in '%s'", qPrintable(font.familyName()));
return false;
}
- textureCount = m_areaAllocator->size().height() / m_maxTextureSize;
+ textureCount = m_areaAllocator->size().height() / m_maxTextureHeight;
m_maxTextureCount = qMax(m_maxTextureCount, textureCount);
const char *textureRecord = allocatorData;
diff --git a/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache_p.h b/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache_p.h
index c64adddd91..0420ef251e 100644
--- a/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache_p.h
+++ b/src/quick/scenegraph/qsgdefaultdistancefieldglyphcache_p.h
@@ -80,7 +80,6 @@ public:
bool useTextureResizeWorkaround() const;
bool useTextureUploadWorkaround() const;
bool createFullSizeTextures() const;
- int maxTextureSize() const;
void setMaxTextureCount(int max) { m_maxTextureCount = max; }
int maxTextureCount() const { return m_maxTextureCount; }
@@ -97,7 +96,7 @@ private:
QDistanceField image;
int padding = -1;
- TextureInfo(const QRect &preallocRect = QRect()) : texture(0), allocatedArea(preallocRect) { }
+ TextureInfo(const QRect &preallocRect = QRect(0, 0, 1, 1)) : texture(0), allocatedArea(preallocRect) { }
};
void createTexture(TextureInfo * texInfo, int width, int height, const void *pixels);
@@ -106,9 +105,10 @@ private:
TextureInfo *textureInfo(int index)
{
+ Q_ASSERT(m_maxTextureWidth > 0 && m_maxTextureHeight > 0);
for (int i = m_textures.count(); i <= index; ++i) {
if (createFullSizeTextures())
- m_textures.append(QRect(0, 0, maxTextureSize(), maxTextureSize()));
+ m_textures.append(QRect(0, 0, m_maxTextureWidth, m_maxTextureWidth));
else
m_textures.append(TextureInfo());
}
@@ -136,7 +136,8 @@ private:
m_blitProgram->link();
}
- mutable int m_maxTextureSize;
+ int m_maxTextureWidth;
+ int m_maxTextureHeight;
int m_maxTextureCount;
bool m_coreProfile;