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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 166 insertions, 0 deletions

diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
new file mode 100644
index 0000000000..133289e81c
--- /dev/null
+++ b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
@@ -0,0 +1,166 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTEXTUREGLYPHCACHE_GL_P_H
+#define QTEXTUREGLYPHCACHE_GL_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of the QLibrary class.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <private/qtextureglyphcache_p.h>
+#include <private/qgl_p.h>
+#include <qglshaderprogram.h>
+
+// #define QT_GL_TEXTURE_GLYPH_CACHE_DEBUG
+
+QT_BEGIN_NAMESPACE
+
+class QGL2PaintEngineExPrivate;
+
+struct QGLGlyphTexture
+{
+    QGLGlyphTexture(const QGLContext *ctx)
+        : m_width(0)
+        , m_height(0)
+    {
+        if (ctx && !ctx->d_ptr->workaround_brokenFBOReadBack)
+            glGenFramebuffers(1, &m_fbo);
+
+#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG
+        qDebug(" -> QGLGlyphTexture() %p for context %p.", this, ctx);
+#endif
+    }
+
+    ~QGLGlyphTexture() {
+        const QGLContext *ctx = QGLContext::currentContext();
+#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG
+        qDebug("~QGLGlyphTexture() %p for context %p.", this, ctx);
+#endif
+        // At this point, the context group is made current, so it's safe to
+        // release resources without a makeCurrent() call
+        if (ctx) {
+            if (!ctx->d_ptr->workaround_brokenFBOReadBack)
+                glDeleteFramebuffers(1, &m_fbo);
+            if (m_width || m_height)
+                glDeleteTextures(1, &m_texture);
+        }
+    }
+
+    GLuint m_texture;
+    GLuint m_fbo;
+    int m_width;
+    int m_height;
+};
+
+class Q_OPENGL_EXPORT QGLTextureGlyphCache : public QImageTextureGlyphCache, public QGLContextGroupResourceBase
+{
+public:
+    QGLTextureGlyphCache(const QGLContext *context, QFontEngineGlyphCache::Type type, const QTransform &matrix);
+    ~QGLTextureGlyphCache();
+
+    virtual void createTextureData(int width, int height);
+    virtual void resizeTextureData(int width, int height);
+    virtual void fillTexture(const Coord &c, glyph_t glyph, QFixed subPixelPosition);
+    virtual int glyphPadding() const;
+    virtual int maxTextureWidth() const;
+    virtual int maxTextureHeight() const;
+
+    inline GLuint texture() const {
+        QGLTextureGlyphCache *that = const_cast<QGLTextureGlyphCache *>(this);
+        QGLGlyphTexture *glyphTexture = that->m_textureResource.value(ctx);
+        return glyphTexture ? glyphTexture->m_texture : 0;
+    }
+
+    inline int width() const {
+        QGLTextureGlyphCache *that = const_cast<QGLTextureGlyphCache *>(this);
+        QGLGlyphTexture *glyphTexture = that->m_textureResource.value(ctx);
+        return glyphTexture ? glyphTexture->m_width : 0;
+    }
+    inline int height() const {
+        QGLTextureGlyphCache *that = const_cast<QGLTextureGlyphCache *>(this);
+        QGLGlyphTexture *glyphTexture = that->m_textureResource.value(ctx);
+        return glyphTexture ? glyphTexture->m_height : 0;
+    }
+
+    inline void setPaintEnginePrivate(QGL2PaintEngineExPrivate *p) { pex = p; }
+
+    void setContext(const QGLContext *context);
+    inline const QGLContext *context() const { return ctx; }
+
+    inline int serialNumber() const { return m_serialNumber; }
+
+    enum FilterMode {
+        Nearest,
+        Linear
+    };
+    FilterMode filterMode() const { return m_filterMode; }
+    void setFilterMode(FilterMode m) { m_filterMode = m; }
+
+    void clear();
+
+    void freeResource(void *) { ctx = 0; }
+
+private:
+    QGLContextGroupResource<QGLGlyphTexture> m_textureResource;
+
+    const QGLContext *ctx;
+    QGL2PaintEngineExPrivate *pex;
+    QGLShaderProgram *m_blitProgram;
+    FilterMode m_filterMode;
+
+    GLfloat m_vertexCoordinateArray[8];
+    GLfloat m_textureCoordinateArray[8];
+
+    int m_serialNumber;
+};
+
+QT_END_NAMESPACE
+
+#endif
+