qopengltextureglyphcache.cpp

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#include "qopengltextureglyphcache_p.h"
#include "qopenglpaintengine_p.h"
#include "private/qopenglengineshadersource_p.h"
#include "qopenglextensions_p.h"
#include <qrgb.h>
#include <private/qdrawhelper_p.h>

QT_BEGIN_NAMESPACE


QBasicAtomicInt qopengltextureglyphcache_serial_number = Q_BASIC_ATOMIC_INITIALIZER(1);

QOpenGLTextureGlyphCache::QOpenGLTextureGlyphCache(QFontEngine::GlyphFormat format, const QTransform &matrix)
    : QImageTextureGlyphCache(format, matrix)
    , m_textureResource(0)
    , pex(0)
    , m_blitProgram(0)
    , m_filterMode(Nearest)
    , m_serialNumber(qopengltextureglyphcache_serial_number.fetchAndAddRelaxed(1))
    , m_buffer(QOpenGLBuffer::VertexBuffer)
{
#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG
    qDebug(" -> QOpenGLTextureGlyphCache() %p for context %p.", this, QOpenGLContext::currentContext());
#endif
    m_vertexCoordinateArray[0] = -1.0f;
    m_vertexCoordinateArray[1] = -1.0f;
    m_vertexCoordinateArray[2] =  1.0f;
    m_vertexCoordinateArray[3] = -1.0f;
    m_vertexCoordinateArray[4] =  1.0f;
    m_vertexCoordinateArray[5] =  1.0f;
    m_vertexCoordinateArray[6] = -1.0f;
    m_vertexCoordinateArray[7] =  1.0f;

    m_textureCoordinateArray[0] = 0.0f;
    m_textureCoordinateArray[1] = 0.0f;
    m_textureCoordinateArray[2] = 1.0f;
    m_textureCoordinateArray[3] = 0.0f;