123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147 | // Copyright (C) 2016 The Qt Company Ltd.// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only#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 purely as an// implementation detail. This header file may change from version to// version without notice, or even be removed.//// We mean it.//#include <QtOpenGL/qtopenglglobal.h>#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:explicitQOpenGLGlyphTexture(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_DEBUGqDebug(" -> QOpenGLGlyphTexture() %p for context %p.",this, ctx);#endif}voidfreeResource(QOpenGLContext *context) override { QOpenGLContext *ctx = context;#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUGqDebug("~QOpenGLGlyphTexture() %p for context %p.",this, ctx);#endifif(!ctx->d_func()->workaround_brokenFBOReadBack) ctx->functions()->glDeleteFramebuffers(1, &m_fbo);if(m_width || m_height) ctx->functions()->glDeleteTextures(1, &m_texture);}voidinvalidateResource() 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_OPENGL_EXPORT QOpenGLTextureGlyphCache :public QImageTextureGlyphCache {public:QOpenGLTextureGlyphCache(QFontEngine::GlyphFormat glyphFormat,const QTransform &matrix,const QColor &color =QColor());~QOpenGLTextureGlyphCache();virtualvoidcreateTextureData(int width,int height) override;virtualvoidresizeTextureData(int width,int height) override;virtualvoidfillTexture(const Coord &c, glyph_t glyph,const QFixedPoint &subPixelPosition) override;virtualintglyphPadding()const override;virtualintmaxTextureWidth()const override;virtualintmaxTextureHeight()const override;inline GLuint texture()const{ QOpenGLTextureGlyphCache *that =const_cast<QOpenGLTextureGlyphCache *>(this); QOpenGLGlyphTexture *glyphTexture = that->m_textureResource;return glyphTexture ? glyphTexture->m_texture :0;}inlineintwidth()const{ QOpenGLTextureGlyphCache *that =const_cast<QOpenGLTextureGlyphCache *>(this); QOpenGLGlyphTexture *glyphTexture = that->m_textureResource;return glyphTexture ? glyphTexture->m_width :0;}inlineintheight()const{ QOpenGLTextureGlyphCache *that =const_cast<QOpenGLTextureGlyphCache *>(this); QOpenGLGlyphTexture *glyphTexture = that->m_textureResource;return glyphTexture ? glyphTexture->m_height :0;}inlinevoidsetPaintEnginePrivate(QOpenGL2PaintEngineExPrivate *p) { pex = p; }inlineconst QOpenGLContextGroup *contextGroup()const{return m_textureResource ? m_textureResource->group() :nullptr; }inlineintserialNumber()const{return m_serialNumber; }enum FilterMode { Nearest, Linear }; FilterMode filterMode()const{return m_filterMode; }voidsetFilterMode(FilterMode m) { m_filterMode = m; }voidclear(); QOpenGL2PaintEngineExPrivate *paintEnginePrivate()const{return pex;}private:voidsetupVertexAttribs(); 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
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