Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++
++ #include "qsgopenvgfontglyphcache.h"
++ #include "qsgopenvghelpers.h"
++ #include <private/qfontengine_p.h>
++ #include <private/qrawfont_p.h>
++
++ QT_BEGIN_NAMESPACE
++
++ QSGOpenVGFontGlyphCacheManager::QSGOpenVGFontGlyphCacheManager()
++ {
++
++ }
++
++ QSGOpenVGFontGlyphCacheManager::~QSGOpenVGFontGlyphCacheManager()
++ {
++ qDeleteAll(m_caches);
++ }
++
++ QSGOpenVGFontGlyphCache *QSGOpenVGFontGlyphCacheManager::cache(const QRawFont &font)
++ {
++ return m_caches.value(font, nullptr);
++ }
++
++ void QSGOpenVGFontGlyphCacheManager::insertCache(const QRawFont &font, QSGOpenVGFontGlyphCache *cache)
++ {
++ m_caches.insert(font, cache);
++ }
++
++ QSGOpenVGFontGlyphCache::QSGOpenVGFontGlyphCache(QSGOpenVGFontGlyphCacheManager *manager, const QRawFont &font)
++ : m_manager(manager)
++ {
++ m_referenceFont = font;
++ QRawFontPrivate *fontD = QRawFontPrivate::get(font);
++ m_glyphCount = fontD->fontEngine->glyphCount();
++ m_font = vgCreateFont(0);
++ }
++
++ QSGOpenVGFontGlyphCache::~QSGOpenVGFontGlyphCache()
++ {
++ if (m_font != VG_INVALID_HANDLE)
++ vgDestroyFont(m_font);
++ }
++
++ void QSGOpenVGFontGlyphCache::populate(const QList<quint32> &glyphs)
++ {
++ QSet<quint32> referencedGlyphs;
++ QSet<quint32> newGlyphs;
++ int count = glyphs.count();
++ for (int i = 0; i < count; ++i) {
++ quint32 glyphIndex = glyphs.at(i);
++ if ((int) glyphIndex >= glyphCount()) {
++ qWarning("Warning: glyph is not available with index %d", glyphIndex);
++ continue;
++ }
++
++ referencedGlyphs.insert(glyphIndex);
++
++
++ if (!m_glyphReferences.contains(glyphIndex)) {
++ newGlyphs.insert(glyphIndex);
++ }
++ }
++
++ referenceGlyphs(referencedGlyphs);
++ if (!newGlyphs.isEmpty())
++ requestGlyphs(newGlyphs);
++ }
++
++ void QSGOpenVGFontGlyphCache::release(const QList<quint32> &glyphs)
++ {
++ QSet<quint32> unusedGlyphs;
++ int count = glyphs.count();
++ for (int i = 0; i < count; ++i) {
++ quint32 glyphIndex = glyphs.at(i);
++ unusedGlyphs.insert(glyphIndex);
++ }
++ releaseGlyphs(unusedGlyphs);
++ }
++
++ void QSGOpenVGFontGlyphCache::requestGlyphs(const QSet<quint32> &glyphs)
++ {
++ VGfloat origin[2];
++ VGfloat escapement[2];
++ QRawFont rawFont = m_referenceFont;
++
++ for (auto glyph : glyphs) {
++ // Calculate the path for the glyph and cache it.
++ QPainterPath path = rawFont.pathForGlyph(glyph);
++ VGPath vgPath;
++ if (!path.isEmpty()) {
++ vgPath = QSGOpenVGHelpers::qPainterPathToVGPath(path);
++ } else {
++ // Probably a "space" character with no visible outline.
++ vgPath = VG_INVALID_HANDLE;
++ }
++ origin[0] = 0;
++ origin[1] = 0;
++ escapement[0] = 0;
++ escapement[1] = 0;
++ vgSetGlyphToPath(m_font, glyph, vgPath, VG_FALSE, origin, escapement);
++ vgDestroyPath(vgPath); // Reduce reference count.
++ }
++
++ }
++
++ void QSGOpenVGFontGlyphCache::referenceGlyphs(const QSet<quint32> &glyphs)
++ {
++ for (auto glyph : glyphs) {
++ if (m_glyphReferences.contains(glyph))
++ m_glyphReferences[glyph] += 1;
++ else
++ m_glyphReferences.insert(glyph, 1);
++ }
++ }
++
++ void QSGOpenVGFontGlyphCache::releaseGlyphs(const QSet<quint32> &glyphs)
++ {
++ for (auto glyph : glyphs) {
++ int references = m_glyphReferences[glyph] -= 1;
++ if (references == 0) {
++ vgClearGlyph(m_font, glyph);
++ m_glyphReferences.remove(glyph);
++ }
++ }
++ }
++
++ QT_END_NAMESPACE