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| |
| #ifndef QOPENGLTEXTUREGLYPHCACHE_P_H |
| #define QOPENGLTEXTUREGLYPHCACHE_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/qopenglcontext_p.h> |
| #include <qopenglshaderprogram.h> |
| #include <qopenglfunctions.h> |
| #include <qopenglbuffer.h> |
| #include <qopenglvertexarrayobject.h> |
| |
| // #define QT_GL_TEXTURE_GLYPH_CACHE_DEBUG |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QOpenGL2PaintEngineExPrivate; |
| |
| class QOpenGLGlyphTexture : public QOpenGLSharedResource |
| { |
| public: |
| explicit QOpenGLGlyphTexture(QOpenGLContext *ctx) |
| : QOpenGLSharedResource(ctx->shareGroup()) |
| , m_width(0) |
| , m_height(0) |
| { |
| if (!ctx->d_func()->workaround_brokenFBOReadBack) |
| QOpenGLFunctions(ctx).glGenFramebuffers(1, &m_fbo); |
| |
| #ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG |
| qDebug(" -> QOpenGLGlyphTexture() %p for context %p.", this, ctx); |
| #endif |
| } |
| |
| void freeResource(QOpenGLContext *context) Q_DECL_OVERRIDE |
| { |
| QOpenGLContext *ctx = context; |
| #ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG |
| qDebug("~QOpenGLGlyphTexture() %p for context %p.", this, ctx); |
| #endif |
| if (!ctx->d_func()->workaround_brokenFBOReadBack) |
| ctx->functions()->glDeleteFramebuffers(1, &m_fbo); |
| if (m_width || m_height) |
| ctx->functions()->glDeleteTextures(1, &m_texture); |
| } |
| |
| void invalidateResource() Q_DECL_OVERRIDE |
| { |
| m_texture = 0; |
| m_fbo = 0; |
| m_width = 0; |
| m_height = 0; |
| } |
| |
| GLuint m_texture; |
| GLuint m_fbo; |
| int m_width; |
| int m_height; |
| }; |
| |
| class Q_GUI_EXPORT QOpenGLTextureGlyphCache : public QImageTextureGlyphCache |
| { |
| public: |
| QOpenGLTextureGlyphCache(QFontEngine::GlyphFormat glyphFormat, const QTransform &matrix); |
| ~QOpenGLTextureGlyphCache(); |
| |
| virtual void createTextureData(int width, int height) Q_DECL_OVERRIDE; |
| virtual void resizeTextureData(int width, int height) Q_DECL_OVERRIDE; |
| virtual void fillTexture(const Coord &c, glyph_t glyph, QFixed subPixelPosition) Q_DECL_OVERRIDE; |
| virtual int glyphPadding() const Q_DECL_OVERRIDE; |
| virtual int maxTextureWidth() const Q_DECL_OVERRIDE; |
| virtual int maxTextureHeight() const Q_DECL_OVERRIDE; |
| |
| inline GLuint texture() const { |
| QOpenGLTextureGlyphCache *that = const_cast<QOpenGLTextureGlyphCache *>(this); |
| QOpenGLGlyphTexture *glyphTexture = that->m_textureResource; |
| return glyphTexture ? glyphTexture->m_texture : 0; |
| } |
| |
| inline int width() const { |
| QOpenGLTextureGlyphCache *that = const_cast<QOpenGLTextureGlyphCache *>(this); |
| QOpenGLGlyphTexture *glyphTexture = that->m_textureResource; |
| return glyphTexture ? glyphTexture->m_width : 0; |
| } |
| inline int height() const { |
| QOpenGLTextureGlyphCache *that = const_cast<QOpenGLTextureGlyphCache *>(this); |
| QOpenGLGlyphTexture *glyphTexture = that->m_textureResource; |
| return glyphTexture ? glyphTexture->m_height : 0; |
| } |
| |
| inline void setPaintEnginePrivate(QOpenGL2PaintEngineExPrivate *p) { pex = p; } |
| |
| inline const QOpenGLContextGroup *contextGroup() const { return m_textureResource ? m_textureResource->group() : 0; } |
| |
| 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(); |
| |
| private: |
| void setupVertexAttribs(); |
| |
| QOpenGLGlyphTexture *m_textureResource; |
| |
| QOpenGL2PaintEngineExPrivate *pex; |
| QOpenGLShaderProgram *m_blitProgram; |
| FilterMode m_filterMode; |
| |
| GLfloat m_vertexCoordinateArray[8]; |
| GLfloat m_textureCoordinateArray[8]; |
| |
| int m_serialNumber; |
| |
| QOpenGLBuffer m_buffer; |
| QOpenGLVertexArrayObject m_vao; |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QOPENGLTEXTUREGLYPHCACHE_P_H |
| |