ShivaVGWindowSurfacePrivate Class Reference

Public Functions
void	ensureContext (QWidget *widget)
	ShivaVGWindowSurfacePrivate ()
	~ShivaVGWindowSurfacePrivate ()

Public Variables
GLXContext	context
GLXDrawable	drawable
QVGPaintEngine *	engine
bool	isCurrent
bool	needsResize
QSize	size

Detailed Description

Definition at line 76 of file shivavgwindowsurface.cpp.

Constructors and Destructors

ShivaVGWindowSurfacePrivate()

ShivaVGWindowSurfacePrivate::ShivaVGWindowSurfacePrivate ( )

inline

Definition at line 79 of file shivavgwindowsurface.cpp.

        : isCurrent(false)
        , needsResize(true)
        , engine(0)
#if defined(QVG_USE_FBO)
        , fbo(0)
        , texture(0)
#endif
#if defined(Q_WS_X11)
        , drawable(0)
        , context(0)
#endif
    {
    }

~ShivaVGWindowSurfacePrivate()

ShivaVGWindowSurfacePrivate::~ShivaVGWindowSurfacePrivate

(

)

Definition at line 162 of file shivavgwindowsurface.cpp.

{
#if defined(QVG_USE_FBO)
    if (fbo) {
        glDeleteTextures(1, &texture);
        glDeleteFramebuffersEXT(1, &fbo);
    }
#endif
}

Functions

ensureContext()

void ShivaVGWindowSurfacePrivate::ensureContext

(

QWidget *

widget

)

Definition at line 172 of file shivavgwindowsurface.cpp.

Referenced by ShivaVGWindowSurface::flush(), and ShivaVGWindowSurface::paintDevice().

{
#if defined(Q_WS_X11)
    Window win = widget->winId();
    if (win != drawable) {
        if (context)
            glXDestroyContext(X11->display, context);
        drawable = win;
    }
    if (context == 0) {
        const QX11Info *xinfo = qt_x11Info(widget);
        int spec[64];
        int i = 0;
        spec[i++] = GLX_DOUBLEBUFFER;
        spec[i++] = GLX_DEPTH_SIZE;
        spec[i++] = 1;
        spec[i++] = GLX_STENCIL_SIZE;
        spec[i++] = 1;
        spec[i++] = GLX_RGBA;
        spec[i++] = GLX_RED_SIZE;
        spec[i++] = 1;
        spec[i++] = GLX_GREEN_SIZE;
        spec[i++] = 1;
        spec[i++] = GLX_BLUE_SIZE;
        spec[i++] = 1;
        spec[i++] = GLX_SAMPLE_BUFFERS_ARB;
        spec[i++] = 1;
        spec[i++] = GLX_SAMPLES_ARB;
        spec[i++] = 4;
        spec[i] = XNone;
        XVisualInfo *visual = glXChooseVisual
            (xinfo->display(), xinfo->screen(), spec);
        context = glXCreateContext(X11->display, visual, 0, True);
        if (!context)
            qWarning("glXCreateContext: could not create GL context for VG rendering");
    }
#else
    Q_UNUSED(widget);
#endif
#if defined(QVG_USE_FBO)
    if (needsResize && fbo) {
#if defined(Q_WS_X11)
        glXMakeCurrent(X11->display, drawable, context);
#endif
        glDeleteTextures(1, &texture);
        glDeleteFramebuffersEXT(1, &fbo);
#if defined(Q_WS_X11)
        glXMakeCurrent(X11->display, 0, 0);
#endif
        fbo = 0;
        texture = 0;
    }
    if (!fbo) {
#if defined(Q_WS_X11)
        glXMakeCurrent(X11->display, drawable, context);
#endif
        glGenFramebuffersEXT(1, &fbo);
        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);

        glGenTextures(1, &texture);
        glBindTexture(GL_TEXTURE_2D, texture);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, size.width(), size.height(), 0,
                     GL_RGBA, GL_UNSIGNED_BYTE, NULL);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
        glFramebufferTexture2DEXT
            (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D,
             texture, 0);

        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
#if defined(Q_WS_X11)
        glXMakeCurrent(X11->display, 0, 0);
#endif
    }
#endif
    needsResize = false;
}

Properties

context

GLXContext ShivaVGWindowSurfacePrivate::context

Definition at line 107 of file shivavgwindowsurface.cpp.

Referenced by QShivaContext::makeCurrent(), and ShivaVGWindowSurface::~ShivaVGWindowSurface().

drawable

GLXDrawable ShivaVGWindowSurfacePrivate::drawable

Definition at line 106 of file shivavgwindowsurface.cpp.

Referenced by ShivaVGWindowSurface::flush(), and QShivaContext::makeCurrent().

engine

QVGPaintEngine* ShivaVGWindowSurfacePrivate::engine

Definition at line 100 of file shivavgwindowsurface.cpp.

Referenced by ShivaVGWindowSurface::paintEngine().

isCurrent

bool ShivaVGWindowSurfacePrivate::isCurrent

Definition at line 98 of file shivavgwindowsurface.cpp.

Referenced by QShivaContext::doneCurrent(), ShivaVGWindowSurface::flush(), QShivaContext::makeCurrent(), and ShivaVGWindowSurface::~ShivaVGWindowSurface().

needsResize

bool ShivaVGWindowSurfacePrivate::needsResize

Definition at line 99 of file shivavgwindowsurface.cpp.

Referenced by ShivaVGWindowSurface::setGeometry().

size

QSize ShivaVGWindowSurfacePrivate::size

Definition at line 97 of file shivavgwindowsurface.cpp.

Referenced by QShivaContext::makeCurrent(), and ShivaVGWindowSurface::setGeometry().

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

• /src/plugins/graphicssystems/shivavg/shivavgwindowsurface.cpp