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Diffstat (limited to 'src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h')
| -rw-r--r-- | src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h | 166 |
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 + |