From b4954701093739e7a4e54a0669f306922d0d4605 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pasi=20Kera=CC=88nen?= <pasi.keranen@qt.io>
Date: Thu, 6 Jun 2019 16:22:02 +0300
Subject: Long live the slayer!
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Initial commit of OpenGL Runtime to repository.
Based on SHA1 61823aaccc6510699a54b34a2fe3f7523dab3b4e
of qt3dstudio repository.

Task-number: QT3DS-3600
Change-Id: Iaeb80237399f0e5656a19ebec9d1ab3a681d8832
Reviewed-by: Pasi Keränen <pasi.keranen@qt.io>
---
 src/runtimerender/Qt3DSDistanceFieldGlyphCache_p.h | 101 +++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 src/runtimerender/Qt3DSDistanceFieldGlyphCache_p.h

(limited to 'src/runtimerender/Qt3DSDistanceFieldGlyphCache_p.h')

diff --git a/src/runtimerender/Qt3DSDistanceFieldGlyphCache_p.h b/src/runtimerender/Qt3DSDistanceFieldGlyphCache_p.h
new file mode 100644
index 0000000..679d3ad
--- /dev/null
+++ b/src/runtimerender/Qt3DSDistanceFieldGlyphCache_p.h
@@ -0,0 +1,101 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef Q3DSDISTANCEFIELDGLYPHCACHE_P_H
+#define Q3DSDISTANCEFIELDGLYPHCACHE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtQuick/private/qsgadaptationlayer_p.h>
+#include "render/Qt3DSRenderTexture2D.h"
+#include "Qt3DSRenderContextCore.h"
+
+#if QT_VERSION >= QT_VERSION_CHECK(5,12,2)
+
+QT_BEGIN_NAMESPACE
+
+class QSGAreaAllocator;
+class Q3DSDistanceFieldGlyphCache : public QSGDistanceFieldGlyphCache
+{
+public:
+    struct TextureInfo {
+        qt3ds::render::NVRenderTexture2D *texture;
+        int padding = -1;
+
+        QRect allocatedArea;
+        QImage copy;
+    };
+
+    Q3DSDistanceFieldGlyphCache(const QRawFont &font,
+                                qt3ds::render::IQt3DSRenderContext &context);
+    ~Q3DSDistanceFieldGlyphCache() override;
+
+    void requestGlyphs(const QSet<glyph_t> &glyphs) override;
+    void storeGlyphs(const QList<QDistanceField> &glyphs) override;
+    void referenceGlyphs(const QSet<glyph_t> &glyphs) override;
+    void releaseGlyphs(const QSet<glyph_t> &glyphs) override;
+
+    void processPendingGlyphs() override;
+
+    TextureInfo *textureInfoById(uint textureId) const;
+
+    qreal fontSize() const;
+
+private:
+    bool loadPregeneratedCache(const QRawFont &font);
+    TextureInfo *textureInfo(int index) const;
+
+    int maxTextureSize() const;
+    void resizeTexture(TextureInfo *info, int width, int height);
+    void setTextureData(qt3ds::render::NVRenderTexture2D *texture, QImage &image);
+
+    QSGAreaAllocator *m_areaAllocator = nullptr;
+    int m_maxTextureSize              = 0;
+    int m_maxTextureCount             = 3;
+
+    mutable QVector<TextureInfo> m_textures;
+    QHash<glyph_t, TextureInfo *> m_glyphsTexture;
+    QSet<glyph_t> m_unusedGlyphs;
+    qt3ds::render::IQt3DSRenderContext &m_context;
+};
+
+QT_END_NAMESPACE
+
+#endif // Q3DSDISTANCEFIELDGLYPHCACHE_P_H
+
+#endif // QT_VERSION >= QT_VERSION_CHECK(5,12,2)
-- 
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