QGLContextPrivate Class Reference

#include <qgl_p.h>

Collaboration diagram for QGLContextPrivate:

[legend]List of all members.

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Detailed Description

Definition at line 185 of file qgl_p.h.

Public Member Functions
	QGLContextPrivate (QGLContext *context)
	~QGLContextPrivate ()
GLuint	bindTexture (const QImage &image, GLenum target, GLint format, const QString &key, qint64 qt_id, bool clean=false)
GLuint	bindTexture (const QPixmap &pixmap, GLenum target, GLint format, bool clean)
GLuint	bindTexture (const QImage &image, GLenum target, GLint format, bool clean)
bool	textureCacheLookup (const QString &key, GLuint *id, qint64 *qt_id)
void	init (QPaintDevice *dev, const QGLFormat &format)
QImage	convertToBGRA (const QImage &image, bool force_premul)
Public Attributes
QGLFormat	glFormat
QGLFormat	reqFormat
uint	valid: 1
uint	sharing: 1
uint	initDone: 1
uint	crWin: 1
QPaintDevice *	paintDevice
QColor	transpColor
QGLContext *	q_ptr

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Constructor & Destructor Documentation

QGLContextPrivate::QGLContextPrivate

(

QGLContext *

context

)

[inline, explicit]

Definition at line 189 of file qgl_p.h.

References qt_glAttachShader, qt_glBindFramebufferEXT, qt_glBindProgramARB, qt_glBindRenderbufferEXT, qt_glCheckFramebufferStatusEXT, qt_glCompileShader, qt_glCreateProgram, qt_glCreateShader, qt_glDeleteFramebuffersEXT, qt_glDeleteProgram, qt_glDeleteProgramsARB, qt_glDeleteRenderbuffersEXT, qt_glDeleteShader, qt_glDetachShader, qt_glFramebufferRenderbufferEXT, qt_glFramebufferTexture1DEXT, qt_glFramebufferTexture2DEXT, qt_glFramebufferTexture3DEXT, qt_glGenerateMipmapEXT, qt_glGenFramebuffersEXT, qt_glGenProgramsARB, qt_glGenRenderbuffersEXT, qt_glGetFramebufferAttachmentParameterivEXT, qt_glGetProgramiv, qt_glGetRenderbufferParameterivEXT, qt_glGetShaderInfoLog, qt_glGetUniformLocation, qt_glIsFramebufferEXT, qt_glIsRenderbufferEXT, qt_glLinkProgram, qt_glProgramLocalParameter4fvARB, qt_glProgramStringARB, qt_glRenderbufferStorageEXT, qt_glShaderSource, qt_glUniform1fv, qt_glUniform1i, qt_glUniform2fv, qt_glUniform3fv, qt_glUniform4fv, and qt_glUseProgram.

                                                    : q_ptr(context)
    {
#ifdef Q_WS_WIN
        qt_glProgramStringARB = 0;
        qt_glBindProgramARB = 0;
        qt_glDeleteProgramsARB = 0;
        qt_glGenProgramsARB = 0;
        qt_glProgramLocalParameter4fvARB = 0;

        qt_glCreateShader = 0;
        qt_glShaderSource = 0;
        qt_glCompileShader = 0;
        qt_glDeleteShader = 0;

        qt_glCreateProgram = 0;
        qt_glAttachShader = 0;
        qt_glDetachShader = 0;
        qt_glLinkProgram = 0;
        qt_glUseProgram = 0;
        qt_glDeleteProgram = 0;

        qt_glGetShaderInfoLog = 0;
        qt_glGetProgramiv = 0;

        qt_glGetUniformLocation = 0;
        qt_glUniform4fv = 0;
        qt_glUniform3fv = 0;
        qt_glUniform2fv = 0;
        qt_glUniform1fv = 0;
        qt_glUniform1i = 0;

        qt_glIsRenderbufferEXT = 0;
        qt_glBindRenderbufferEXT = 0;
        qt_glDeleteRenderbuffersEXT = 0;
        qt_glGenRenderbuffersEXT = 0;
        qt_glRenderbufferStorageEXT = 0;
        qt_glGetRenderbufferParameterivEXT = 0;
        qt_glIsFramebufferEXT = 0;
        qt_glBindFramebufferEXT = 0;
        qt_glDeleteFramebuffersEXT = 0;
        qt_glGenFramebuffersEXT = 0;
        qt_glCheckFramebufferStatusEXT = 0;
        qt_glFramebufferTexture1DEXT = 0;
        qt_glFramebufferTexture2DEXT = 0;
        qt_glFramebufferTexture3DEXT = 0;
        qt_glFramebufferRenderbufferEXT = 0;
        qt_glGetFramebufferAttachmentParameterivEXT = 0;
        qt_glGenerateMipmapEXT = 0;
#endif
    }

QGLContextPrivate::~QGLContextPrivate

(

)

[inline]

Definition at line 239 of file qgl_p.h.

{}

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Member Function Documentation

GLuint QGLContextPrivate::bindTexture	(	const QImage &	image,
		GLenum	target,
		GLint	format,
		const QString &	key,
		qint64	qt_id,
		bool	clean = false
	)

Definition at line 1642 of file qgl.cpp.

References QGLTexture::context, convertToBGRA(), QGLExtensions::GenerateMipmap, GL_BGRA, GL_GENERATE_MIPMAP_HINT_SGIS, GL_GENERATE_MIPMAP_SGIS, QGLExtensions::glExtensions, i, image, QCache< Key, T >::insert(), key, QCache< Key, T >::keys(), QCache< Key, T >::maxCost(), nearest_gl_texture_size(), QCache< Key, T >::object(), qt_gl_image_cleanup(), qt_gl_pixmap_cleanup(), qt_image_cleanup_hook, qt_pixmap_cleanup_hook, qt_tex_cache, qt_tex_cache_limit, QCache< Key, T >::remove(), and QCache< Key, T >::totalCost().

Referenced by bindTexture().

{
    Q_Q(QGLContext);

    if (!qt_tex_cache) {
        qt_tex_cache = new QGLTextureCache(qt_tex_cache_limit);
        qt_pixmap_cleanup_hook = qt_gl_pixmap_cleanup;
        qt_image_cleanup_hook = qt_gl_image_cleanup;
    }

    // Scale the pixmap if needed. GL textures needs to have the
    // dimensions 2^n+2(border) x 2^m+2(border).
    QImage tx;
    int tx_w = nearest_gl_texture_size(image.width());
    int tx_h = nearest_gl_texture_size(image.height());

    // Note: the clean param is only true when a texture is bound
    // from the QOpenGLPaintEngine - in that case we have to force
    // a premultiplied texture format
    if (target == GL_TEXTURE_2D && (tx_w != image.width() || tx_h != image.height()))
        tx = convertToBGRA(image.scaled(tx_w, tx_h), clean);
    else
        tx = convertToBGRA(image, clean);

    GLuint tx_id;
    glGenTextures(1, &tx_id);
    glBindTexture(target, tx_id);
    glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    if (QGLExtensions::glExtensions & QGLExtensions::GenerateMipmap
        && target == GL_TEXTURE_2D)
    {
        glHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_NICEST);
        glTexParameteri(target, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
        glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    } else {
        glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    }

    glTexImage2D(target, 0, format, tx.width(), tx.height(), 0, GL_BGRA,
                 GL_UNSIGNED_BYTE, tx.bits());

    // this assumes the size of a texture is always smaller than the max cache size
    int cost = tx.width()*tx.height()*4/1024;
    if (qt_tex_cache->totalCost() + cost > qt_tex_cache->maxCost()) {
        // the cache is full - make an attempt to remove something
        const QList<QString> keys = qt_tex_cache->keys();
        int i = 0;
        while (i < qt_tex_cache->count()
               && (qt_tex_cache->totalCost() + cost > qt_tex_cache->maxCost())) {
            QGLTexture *tex = qt_tex_cache->object(keys.at(i));
            if (tex->context == q)
                qt_tex_cache->remove(keys.at(i));
            ++i;
        }
    }
    qt_tex_cache->insert(key, new QGLTexture(q, tx_id, qt_id, clean), cost);
    return tx_id;
}

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GLuint QGLContextPrivate::bindTexture	(	const QPixmap &	pixmap,
		GLenum	target,
		GLint	format,
		bool	clean
	)

Definition at line 1735 of file qgl.cpp.

References bindTexture(), id, key, qt_pixmap_id(), QPixmap::serialNumber(), textureCacheLookup(), and QPixmap::toImage().

{
    Q_Q(QGLContext);
    const QString key = QString(QLatin1String("%1_%2_%3")).arg(QString().sprintf("p%08x",pixmap.serialNumber())).arg(target).arg(format);
    GLuint id;
    qint64 qt_id;
    if (textureCacheLookup(key, &id, &qt_id)) {
        if (qt_pixmap_id(pixmap) == qt_id) {
            glBindTexture(target, id);
            return id;
        } else {
            q->deleteTexture(id);
        }
    }
    return bindTexture(pixmap.toImage(), target, format, key, qt_pixmap_id(pixmap), clean);
}

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GLuint QGLContextPrivate::bindTexture	(	const QImage &	image,
		GLenum	target,
		GLint	format,
		bool	clean
	)

Definition at line 1717 of file qgl.cpp.

References bindTexture(), id, image, key, qt_image_id(), and textureCacheLookup().

{
    Q_Q(QGLContext);
    const QString key = QString(QLatin1String("%1_%2_%3")).arg(QString().sprintf("i%08x",image.serialNumber())).arg(target).arg(format);
    GLuint id;
    qint64 qt_id;
    if (textureCacheLookup(key, &id, &qt_id)) {
        if (qt_image_id(image) == qt_id) {
            glBindTexture(target, id);
            return id;
        } else {
            q->deleteTexture(id);
        }
    }
    return bindTexture(image, target, format, key, qt_image_id(image), clean);
}

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bool QGLContextPrivate::textureCacheLookup	(	const QString &	key,
		GLuint *	id,
		qint64 *	qt_id
	)

Definition at line 1702 of file qgl.cpp.

References key, QCache< Key, T >::object(), and qt_tex_cache.

Referenced by bindTexture().

{
    Q_Q(QGLContext);
    if (qt_tex_cache) {
        QGLTexture *texture = qt_tex_cache->object(key);
        if (texture && texture->context == q) {
            *id = texture->id;
            *qt_id = texture->qt_id;
            return true;
        }
    }
    return false;
}

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void QGLContextPrivate::init	(	QPaintDevice *	dev,
		const QGLFormat &	format
	)

Definition at line 1239 of file qgl.cpp.

References crWin, glFormat, initDone, reqFormat, sharing, and valid.

{
    Q_Q(QGLContext);
    glFormat = reqFormat = format;
    valid = false;
    q->setDevice(dev);
#if defined(Q_WS_X11)
    gpm = 0;
#endif
#if defined(Q_WS_WIN)
    dc = 0;
    win = 0;
    pixelFormatId = 0;
    cmap = 0;
    hbitmap = 0;
    hbitmap_hdc = 0;
#endif
#if defined(Q_WS_MAC)
    update = false;
#endif
#if defined(Q_WS_QWS)
    dpy = 0;
    cx = 0;
    config = 0;
    surface = 0;
#endif
    crWin = false;
    initDone = false;
    sharing = false;
}

QImage QGLContextPrivate::convertToBGRA	(	const QImage &	image,
		bool	force_premul
	)

Definition at line 1610 of file qgl.cpp.

References QImage::copy(), QImage::Format_ARGB32, QImage::Format_ARGB32_Premultiplied, QImage::height(), i, image, QImage::mirrored(), p, QImage::scanLine(), and QImage::width().

Referenced by bindTexture().

{
    QImage img = image;

    if ((force_premul && image.format() != QImage::Format_ARGB32_Premultiplied)
        || (!force_premul && image.format() != QImage::Format_ARGB32_Premultiplied
            && image.format() != QImage::Format_ARGB32)) {
        img = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
    }

    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
        // mirror + swizzle
        QImage res = img.copy();
        for (int i=0; i < img.height(); i++) {
            uint *p = (uint*) img.scanLine(i);
            uint *q = (uint*) res.scanLine(img.height() - i - 1);
            uint *end = p + img.width();
            while (p < end) {
                *q = ((*p << 24) & 0xff000000)
                     | ((*p >> 24) & 0x000000ff)
                     | ((*p << 8) & 0x00ff0000)
                     | ((*p >> 8) & 0x0000ff00);
                p++;
                q++;
            }
        }
        return res;
    } else {
        return img.mirrored();
    }
}

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Member Data Documentation

QGLFormat QGLContextPrivate::glFormat

Definition at line 272 of file qgl_p.h.

Referenced by init().

QGLFormat QGLContextPrivate::reqFormat

Definition at line 273 of file qgl_p.h.

Referenced by init().

uint QGLContextPrivate::valid

Definition at line 275 of file qgl_p.h.

Referenced by init().

uint QGLContextPrivate::sharing

Definition at line 276 of file qgl_p.h.

Referenced by init().

uint QGLContextPrivate::initDone

Definition at line 277 of file qgl_p.h.

Referenced by init().

uint QGLContextPrivate::crWin

Definition at line 278 of file qgl_p.h.

Referenced by init().

QPaintDevice* QGLContextPrivate::paintDevice

Definition at line 279 of file qgl_p.h.

QColor QGLContextPrivate::transpColor

Definition at line 280 of file qgl_p.h.

QGLContext* QGLContextPrivate::q_ptr

Definition at line 281 of file qgl_p.h.

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The documentation for this class was generated from the following files:

• src/opengl/qgl_p.h
• src/opengl/qgl.cpp

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