diff options
Diffstat (limited to 'src/quick/scenegraph/qsgopengldistancefieldglyphcache_p.h')
| -rw-r--r-- | src/quick/scenegraph/qsgopengldistancefieldglyphcache_p.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/quick/scenegraph/qsgopengldistancefieldglyphcache_p.h b/src/quick/scenegraph/qsgopengldistancefieldglyphcache_p.h new file mode 100644 index 0000000000..99cfe27b9c --- /dev/null +++ b/src/quick/scenegraph/qsgopengldistancefieldglyphcache_p.h @@ -0,0 +1,163 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtQuick module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or 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.GPL2 and 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-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QSGOPENGLDISTANCEFIELDGLYPHCACHE_H +#define QSGOPENGLDISTANCEFIELDGLYPHCACHE_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 "qsgadaptationlayer_p.h" +#include <QtGui/qopenglfunctions.h> +#include <qopenglshaderprogram.h> +#include <qopenglbuffer.h> +#include <qopenglvertexarrayobject.h> +#include <QtGui/private/qopenglengineshadersource_p.h> +#include <private/qsgareaallocator_p.h> + +QT_BEGIN_NAMESPACE + +class QOpenGLSharedResourceGuard; +#if !defined(QT_OPENGL_ES_2) +class QOpenGLFunctions_3_2_Core; +#endif + +class Q_QUICK_PRIVATE_EXPORT QSGOpenGLDistanceFieldGlyphCache : public QSGDistanceFieldGlyphCache +{ +public: + QSGOpenGLDistanceFieldGlyphCache(QOpenGLContext *c, const QRawFont &font); + virtual ~QSGOpenGLDistanceFieldGlyphCache(); + + 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; + + 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; } + + bool eightBitFormatIsAlphaSwizzled() const override { return !m_coreProfile; } + +private: + bool loadPregeneratedCache(const QRawFont &font); + inline bool isCoreProfile() const { return m_coreProfile; } + + struct TextureInfo { + GLuint texture; + QSize size; + QRect allocatedArea; + QDistanceField image; + int padding = -1; + + TextureInfo(const QRect &preallocRect = QRect()) : texture(0), allocatedArea(preallocRect) { } + }; + + void createTexture(TextureInfo * texInfo, int width, int height, const void *pixels); + void createTexture(TextureInfo * texInfo, int width, int height); + void resizeTexture(TextureInfo * texInfo, int width, int height); + + TextureInfo *textureInfo(int index) + { + for (int i = m_textures.count(); i <= index; ++i) { + if (createFullSizeTextures()) + m_textures.append(QRect(0, 0, maxTextureSize(), maxTextureSize())); + else + m_textures.append(TextureInfo()); + } + + return &m_textures[index]; + } + + void createBlitProgram() + { + m_blitProgram = new QOpenGLShaderProgram; + { + const QString source = QLatin1String(qopenglslMainWithTexCoordsVertexShader) + + QLatin1String(qopenglslUntransformedPositionVertexShader); + + m_blitProgram->addCacheableShaderFromSourceCode(QOpenGLShader::Vertex, source); + } + { + const QString source = QLatin1String(qopenglslMainFragmentShader) + + QLatin1String(qopenglslImageSrcFragmentShader); + + m_blitProgram->addCacheableShaderFromSourceCode(QOpenGLShader::Fragment, source); + } + m_blitProgram->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR); + m_blitProgram->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR); + m_blitProgram->link(); + } + + mutable int m_maxTextureSize; + int m_maxTextureCount; + bool m_coreProfile; + + QList<TextureInfo> m_textures; + QHash<glyph_t, TextureInfo *> m_glyphsTexture; + QSet<glyph_t> m_unusedGlyphs; + + QSGAreaAllocator *m_areaAllocator; + + QOpenGLShaderProgram *m_blitProgram; + QOpenGLBuffer m_blitBuffer; + QOpenGLVertexArrayObject m_vao; + + QOpenGLSharedResourceGuard *m_fboGuard; + QOpenGLFunctions *m_funcs; +#if !defined(QT_OPENGL_ES_2) + QOpenGLFunctions_3_2_Core *m_coreFuncs; +#endif +}; + +QT_END_NAMESPACE + +#endif // QSGOPENGLDISTANCEFIELDGLYPHCACHE_H |