gecko/gfx/thebes/gfxXlibSurface.h

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 *   Stuart Parmenter <pavlov@pavlov.net>
 *   Vladimir Vukicevic <vladimir@pobox.com>
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#ifndef GFX_XLIBSURFACE_H
#define GFX_XLIBSURFACE_H

#include "gfxASurface.h"

#include <X11/extensions/Xrender.h>
#include <X11/Xlib.h>

class THEBES_API gfxXlibSurface : public gfxASurface {
public:
    // construct a wrapper around the specified drawable with dpy/visual.
    // Will use XGetGeometry to query the window/pixmap size.
    gfxXlibSurface(Display *dpy, Drawable drawable, Visual *visual);

    // construct a wrapper around the specified drawable with dpy/visual,
    // and known width/height.
    gfxXlibSurface(Display *dpy, Drawable drawable, Visual *visual, const gfxIntSize& size);

    // construct a wrapper around the specified drawable with dpy/format,
    // and known width/height.
    gfxXlibSurface(Screen *screen, Drawable drawable, XRenderPictFormat *format,
                   const gfxIntSize& size);

    gfxXlibSurface(cairo_surface_t *csurf);

    // create a new Pixmap and wrapper surface.
    // |relatedDrawable| provides a hint to the server for determining whether
    // the pixmap should be in video or system memory.  It must be on
    // |screen| (if specified).
    static already_AddRefed<gfxXlibSurface>
    Create(Screen *screen, Visual *visual, const gfxIntSize& size,
           Drawable relatedDrawable = None);
    static already_AddRefed<gfxXlibSurface>
    Create(Screen* screen, XRenderPictFormat *format, const gfxIntSize& size,
           Drawable relatedDrawable = None);

    virtual ~gfxXlibSurface();

    virtual already_AddRefed<gfxASurface>
    CreateSimilarSurface(gfxContentType aType, const gfxIntSize& aSize);

    virtual TextQuality GetTextQualityInTransparentSurfaces()
    {
      return TEXT_QUALITY_OK_OVER_OPAQUE_PIXELS;
    }

    virtual const gfxIntSize GetSize() const { return mSize; }

    Display* XDisplay() { return mDisplay; }
    Screen* XScreen();
    Drawable XDrawable() { return mDrawable; }
    XRenderPictFormat* XRenderFormat();

    static int DepthOfVisual(const Screen* screen, const Visual* visual);
    static Visual* FindVisual(Screen* screen, gfxImageFormat format);
    static XRenderPictFormat *FindRenderFormat(Display *dpy, gfxImageFormat format);

    // take ownership of a passed-in Pixmap, calling XFreePixmap on it
    // when the gfxXlibSurface is destroyed.
    void TakePixmap() {
        NS_ASSERTION(!mPixmapTaken, "I already own the Pixmap!");
        mPixmapTaken = PR_TRUE;
    }

    // Release ownership of this surface's Pixmap.  This is only valid
    // on gfxXlibSurfaces for which the user called TakePixmap(), or
    // on those created by a Create() factory method.
    Drawable ReleasePixmap() {
        NS_ASSERTION(mPixmapTaken, "I don't own the Pixmap!");
        mPixmapTaken = PR_FALSE;
        return mDrawable;
    }

    // Find a visual and colormap pair suitable for rendering to this surface.
    PRBool GetColormapAndVisual(Colormap* colormap, Visual **visual);

protected:
    // if TakePixmap() has been called on this
    PRBool mPixmapTaken;
    
    Display *mDisplay;
    Drawable mDrawable;

    void DoSizeQuery();

    gfxIntSize mSize;
};

#endif /* GFX_XLIBSURFACE_H */