michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "gfxXlibSurface.h"
michael@0: 
michael@0: #include "cairo.h"
michael@0: #include "cairo-xlib.h"
michael@0: #include "cairo-xlib-xrender.h"
michael@0: #include <X11/Xlibint.h>	/* For XESetCloseDisplay */
michael@0: #undef max // Xlibint.h defines this and it breaks std::max
michael@0: #undef min // Xlibint.h defines this and it breaks std::min
michael@0: 
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsTArray.h"
michael@0: #include "nsAlgorithm.h"
michael@0: #include "mozilla/Preferences.h"
michael@0: #include <algorithm>
michael@0: #include "mozilla/CheckedInt.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: // Although the dimension parameters in the xCreatePixmapReq wire protocol are
michael@0: // 16-bit unsigned integers, the server's CreatePixmap returns BadAlloc if
michael@0: // either dimension cannot be represented by a 16-bit *signed* integer.
michael@0: #define XLIB_IMAGE_SIDE_SIZE_LIMIT 0x7fff
michael@0: 
michael@0: gfxXlibSurface::gfxXlibSurface(Display *dpy, Drawable drawable, Visual *visual)
michael@0:     : mPixmapTaken(false), mDisplay(dpy), mDrawable(drawable)
michael@0: #if defined(GL_PROVIDER_GLX)
michael@0:     , mGLXPixmap(None)
michael@0: #endif
michael@0: {
michael@0:     const gfxIntSize size = DoSizeQuery();
michael@0:     cairo_surface_t *surf = cairo_xlib_surface_create(dpy, drawable, visual, size.width, size.height);
michael@0:     Init(surf);
michael@0: }
michael@0: 
michael@0: gfxXlibSurface::gfxXlibSurface(Display *dpy, Drawable drawable, Visual *visual, const gfxIntSize& size)
michael@0:     : mPixmapTaken(false), mDisplay(dpy), mDrawable(drawable)
michael@0: #if defined(GL_PROVIDER_GLX)
michael@0:     , mGLXPixmap(None)
michael@0: #endif
michael@0: {
michael@0:     NS_ASSERTION(CheckSurfaceSize(size, XLIB_IMAGE_SIDE_SIZE_LIMIT),
michael@0:                  "Bad size");
michael@0: 
michael@0:     cairo_surface_t *surf = cairo_xlib_surface_create(dpy, drawable, visual, size.width, size.height);
michael@0:     Init(surf);
michael@0: }
michael@0: 
michael@0: gfxXlibSurface::gfxXlibSurface(Screen *screen, Drawable drawable, XRenderPictFormat *format,
michael@0:                                const gfxIntSize& size)
michael@0:     : mPixmapTaken(false), mDisplay(DisplayOfScreen(screen)),
michael@0:       mDrawable(drawable)
michael@0: #if defined(GL_PROVIDER_GLX)
michael@0:       , mGLXPixmap(None)
michael@0: #endif
michael@0: {
michael@0:     NS_ASSERTION(CheckSurfaceSize(size, XLIB_IMAGE_SIDE_SIZE_LIMIT),
michael@0:                  "Bad Size");
michael@0: 
michael@0:     cairo_surface_t *surf =
michael@0:         cairo_xlib_surface_create_with_xrender_format(mDisplay, drawable,
michael@0:                                                       screen, format,
michael@0:                                                       size.width, size.height);
michael@0:     Init(surf);
michael@0: }
michael@0: 
michael@0: gfxXlibSurface::gfxXlibSurface(cairo_surface_t *csurf)
michael@0:     : mPixmapTaken(false)
michael@0: #if defined(GL_PROVIDER_GLX)
michael@0:       , mGLXPixmap(None)
michael@0: #endif
michael@0: {
michael@0:     NS_PRECONDITION(cairo_surface_status(csurf) == 0,
michael@0:                     "Not expecting an error surface");
michael@0: 
michael@0:     mDrawable = cairo_xlib_surface_get_drawable(csurf);
michael@0:     mDisplay = cairo_xlib_surface_get_display(csurf);
michael@0: 
michael@0:     Init(csurf, true);
michael@0: }
michael@0: 
michael@0: gfxXlibSurface::~gfxXlibSurface()
michael@0: {
michael@0: #if defined(GL_PROVIDER_GLX)
michael@0:     if (mGLXPixmap) {
michael@0:         gl::sGLXLibrary.DestroyPixmap(mDisplay, mGLXPixmap);
michael@0:     }
michael@0: #endif
michael@0:     // gfxASurface's destructor calls RecordMemoryFreed().
michael@0:     if (mPixmapTaken) {
michael@0:         XFreePixmap (mDisplay, mDrawable);
michael@0:     }
michael@0: }
michael@0: 
michael@0: static Drawable
michael@0: CreatePixmap(Screen *screen, const gfxIntSize& size, unsigned int depth,
michael@0:              Drawable relatedDrawable)
michael@0: {
michael@0:     if (!gfxASurface::CheckSurfaceSize(size, XLIB_IMAGE_SIDE_SIZE_LIMIT))
michael@0:         return None;
michael@0: 
michael@0:     if (relatedDrawable == None) {
michael@0:         relatedDrawable = RootWindowOfScreen(screen);
michael@0:     }
michael@0:     Display *dpy = DisplayOfScreen(screen);
michael@0:     // X gives us a fatal error if we try to create a pixmap of width
michael@0:     // or height 0
michael@0:     return XCreatePixmap(dpy, relatedDrawable,
michael@0:                          std::max(1, size.width), std::max(1, size.height),
michael@0:                          depth);
michael@0: }
michael@0: 
michael@0: void
michael@0: gfxXlibSurface::TakePixmap()
michael@0: {
michael@0:     NS_ASSERTION(!mPixmapTaken, "I already own the Pixmap!");
michael@0:     mPixmapTaken = true;
michael@0: 
michael@0:     // The bit depth returned from Cairo is technically int, but this is
michael@0:     // the last place we'd be worried about that scenario.
michael@0:     unsigned int bitDepth = cairo_xlib_surface_get_depth(CairoSurface());
michael@0:     MOZ_ASSERT((bitDepth % 8) == 0, "Memory used not recorded correctly");    
michael@0: 
michael@0:     // Divide by 8 because surface_get_depth gives us the number of *bits* per
michael@0:     // pixel.
michael@0:     gfxIntSize size = GetSize();
michael@0:     CheckedInt32 totalBytes = CheckedInt32(size.width) * CheckedInt32(size.height) * (bitDepth/8);
michael@0: 
michael@0:     // Don't do anything in the "else" case.  We could add INT32_MAX, but that
michael@0:     // would overflow the memory used counter.  It would also mean we tried for
michael@0:     // a 2G image.  For now, we'll just assert,
michael@0:     MOZ_ASSERT(totalBytes.isValid(),"Did not expect to exceed 2Gb image");
michael@0:     if (totalBytes.isValid()) {
michael@0:         RecordMemoryUsed(totalBytes.value());
michael@0:     }
michael@0: }
michael@0: 
michael@0: Drawable
michael@0: gfxXlibSurface::ReleasePixmap() {
michael@0:     NS_ASSERTION(mPixmapTaken, "I don't own the Pixmap!");
michael@0:     mPixmapTaken = false;
michael@0:     RecordMemoryFreed();
michael@0:     return mDrawable;
michael@0: }
michael@0: 
michael@0: static cairo_user_data_key_t gDestroyPixmapKey;
michael@0: 
michael@0: struct DestroyPixmapClosure {
michael@0:     DestroyPixmapClosure(Drawable d, Screen *s) : mPixmap(d), mScreen(s) {}
michael@0:     Drawable mPixmap;
michael@0:     Screen *mScreen;
michael@0: };
michael@0: 
michael@0: static void
michael@0: DestroyPixmap(void *data)
michael@0: {
michael@0:     DestroyPixmapClosure *closure = static_cast<DestroyPixmapClosure*>(data);
michael@0:     XFreePixmap(DisplayOfScreen(closure->mScreen), closure->mPixmap);
michael@0:     delete closure;
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: cairo_surface_t *
michael@0: gfxXlibSurface::CreateCairoSurface(Screen *screen, Visual *visual,
michael@0:                                    const gfxIntSize& size, Drawable relatedDrawable)
michael@0: {
michael@0:     Drawable drawable =
michael@0:         CreatePixmap(screen, size, DepthOfVisual(screen, visual),
michael@0:                      relatedDrawable);
michael@0:     if (!drawable)
michael@0:         return nullptr;
michael@0: 
michael@0:     cairo_surface_t* surface =
michael@0:         cairo_xlib_surface_create(DisplayOfScreen(screen), drawable, visual,
michael@0:                                   size.width, size.height);
michael@0:     if (cairo_surface_status(surface)) {
michael@0:         cairo_surface_destroy(surface);
michael@0:         XFreePixmap(DisplayOfScreen(screen), drawable);
michael@0:         return nullptr;
michael@0:     }
michael@0: 
michael@0:     DestroyPixmapClosure *closure = new DestroyPixmapClosure(drawable, screen);
michael@0:     cairo_surface_set_user_data(surface, &gDestroyPixmapKey,
michael@0:                                 closure, DestroyPixmap);
michael@0:     return surface;
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: already_AddRefed<gfxXlibSurface>
michael@0: gfxXlibSurface::Create(Screen *screen, Visual *visual,
michael@0:                        const gfxIntSize& size, Drawable relatedDrawable)
michael@0: {
michael@0:     Drawable drawable =
michael@0:         CreatePixmap(screen, size, DepthOfVisual(screen, visual),
michael@0:                      relatedDrawable);
michael@0:     if (!drawable)
michael@0:         return nullptr;
michael@0: 
michael@0:     nsRefPtr<gfxXlibSurface> result =
michael@0:         new gfxXlibSurface(DisplayOfScreen(screen), drawable, visual, size);
michael@0:     result->TakePixmap();
michael@0: 
michael@0:     if (result->CairoStatus() != 0)
michael@0:         return nullptr;
michael@0: 
michael@0:     return result.forget();
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: already_AddRefed<gfxXlibSurface>
michael@0: gfxXlibSurface::Create(Screen *screen, XRenderPictFormat *format,
michael@0:                        const gfxIntSize& size, Drawable relatedDrawable)
michael@0: {
michael@0:     Drawable drawable =
michael@0:         CreatePixmap(screen, size, format->depth, relatedDrawable);
michael@0:     if (!drawable)
michael@0:         return nullptr;
michael@0: 
michael@0:     nsRefPtr<gfxXlibSurface> result =
michael@0:         new gfxXlibSurface(screen, drawable, format, size);
michael@0:     result->TakePixmap();
michael@0: 
michael@0:     if (result->CairoStatus() != 0)
michael@0:         return nullptr;
michael@0: 
michael@0:     return result.forget();
michael@0: }
michael@0: 
michael@0: static bool GetForce24bppPref()
michael@0: {
michael@0:     return Preferences::GetBool("mozilla.widget.force-24bpp", false);
michael@0: }
michael@0: 
michael@0: already_AddRefed<gfxASurface>
michael@0: gfxXlibSurface::CreateSimilarSurface(gfxContentType aContent,
michael@0:                                      const gfxIntSize& aSize)
michael@0: {
michael@0:     if (!mSurface || !mSurfaceValid) {
michael@0:       return nullptr;
michael@0:     }
michael@0: 
michael@0:     if (aContent == gfxContentType::COLOR) {
michael@0:         // cairo_surface_create_similar will use a matching visual if it can.
michael@0:         // However, systems with 16-bit or indexed default visuals may benefit
michael@0:         // from rendering with 24-bit formats.
michael@0:         static bool force24bpp = GetForce24bppPref();
michael@0:         if (force24bpp
michael@0:             && cairo_xlib_surface_get_depth(CairoSurface()) != 24) {
michael@0:             XRenderPictFormat* format =
michael@0:                 XRenderFindStandardFormat(mDisplay, PictStandardRGB24);
michael@0:             if (format) {
michael@0:                 // Cairo only performs simple self-copies as desired if it
michael@0:                 // knows that this is a Pixmap surface.  It only knows that
michael@0:                 // surfaces are pixmap surfaces if it creates the Pixmap
michael@0:                 // itself, so we use cairo_surface_create_similar with a
michael@0:                 // temporary reference surface to indicate the format.
michael@0:                 Screen* screen = cairo_xlib_surface_get_screen(CairoSurface());
michael@0:                 nsRefPtr<gfxXlibSurface> depth24reference =
michael@0:                     gfxXlibSurface::Create(screen, format,
michael@0:                                            gfxIntSize(1, 1), mDrawable);
michael@0:                 if (depth24reference)
michael@0:                     return depth24reference->
michael@0:                         gfxASurface::CreateSimilarSurface(aContent, aSize);
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     return gfxASurface::CreateSimilarSurface(aContent, aSize);
michael@0: }
michael@0: 
michael@0: void
michael@0: gfxXlibSurface::Finish()
michael@0: {
michael@0: #if defined(GL_PROVIDER_GLX)
michael@0:     if (mGLXPixmap) {
michael@0:         gl::sGLXLibrary.DestroyPixmap(mDisplay, mGLXPixmap);
michael@0:         mGLXPixmap = None;
michael@0:     }
michael@0: #endif
michael@0:     gfxASurface::Finish();
michael@0: }
michael@0: 
michael@0: const gfxIntSize
michael@0: gfxXlibSurface::GetSize() const
michael@0: {
michael@0:     if (!mSurfaceValid)
michael@0:         return gfxIntSize(0,0);
michael@0: 
michael@0:     return gfxIntSize(cairo_xlib_surface_get_width(mSurface),
michael@0:                       cairo_xlib_surface_get_height(mSurface));
michael@0: }
michael@0: 
michael@0: const gfxIntSize
michael@0: gfxXlibSurface::DoSizeQuery()
michael@0: {
michael@0:     // figure out width/height/depth
michael@0:     Window root_ignore;
michael@0:     int x_ignore, y_ignore;
michael@0:     unsigned int bwidth_ignore, width, height, depth;
michael@0: 
michael@0:     XGetGeometry(mDisplay,
michael@0:                  mDrawable,
michael@0:                  &root_ignore, &x_ignore, &y_ignore,
michael@0:                  &width, &height,
michael@0:                  &bwidth_ignore, &depth);
michael@0: 
michael@0:     return gfxIntSize(width, height);
michael@0: }
michael@0: 
michael@0: class DisplayTable {
michael@0: public:
michael@0:     static bool GetColormapAndVisual(Screen* screen,
michael@0:                                        XRenderPictFormat* format,
michael@0:                                        Visual* visual, Colormap* colormap,
michael@0:                                        Visual** visualForColormap);
michael@0: 
michael@0: private:
michael@0:     struct ColormapEntry {
michael@0:         XRenderPictFormat* mFormat;
michael@0:         // The Screen is needed here because colormaps (and their visuals) may
michael@0:         // only be used on one Screen, but XRenderPictFormats are not unique
michael@0:         // to any one Screen.
michael@0:         Screen* mScreen;
michael@0:         Visual* mVisual;
michael@0:         Colormap mColormap;
michael@0:     };
michael@0: 
michael@0:     class DisplayInfo {
michael@0:     public:
michael@0:         DisplayInfo(Display* display) : mDisplay(display) { }
michael@0:         Display* mDisplay;
michael@0:         nsTArray<ColormapEntry> mColormapEntries;
michael@0:     };
michael@0: 
michael@0:     // Comparator for finding the DisplayInfo
michael@0:     class FindDisplay {
michael@0:     public:
michael@0:         bool Equals(const DisplayInfo& info, const Display *display) const
michael@0:         {
michael@0:             return info.mDisplay == display;
michael@0:         }
michael@0:     };
michael@0: 
michael@0:     static int DisplayClosing(Display *display, XExtCodes* codes);
michael@0: 
michael@0:     nsTArray<DisplayInfo> mDisplays;
michael@0:     static DisplayTable* sDisplayTable;
michael@0: };
michael@0: 
michael@0: DisplayTable* DisplayTable::sDisplayTable;
michael@0: 
michael@0: // Pixmaps don't have a particular associated visual but the pixel values are
michael@0: // interpreted according to a visual/colormap pairs.
michael@0: //
michael@0: // cairo is designed for surfaces with either TrueColor visuals or the
michael@0: // default visual (which may not be true color).  TrueColor visuals don't
michael@0: // really need a colormap because the visual indicates the pixel format,
michael@0: // and cairo uses the default visual with the default colormap, so cairo
michael@0: // surfaces don't need an explicit colormap.
michael@0: //
michael@0: // However, some toolkits (e.g. GDK) need a colormap even with TrueColor
michael@0: // visuals.  We can create a colormap for these visuals, but it will use about
michael@0: // 20kB of memory in the server, so we use the default colormap when
michael@0: // suitable and share colormaps between surfaces.  Another reason for
michael@0: // minimizing colormap turnover is that the plugin process must leak resources
michael@0: // for each new colormap id when using older GDK libraries (bug 569775).
michael@0: //
michael@0: // Only the format of the pixels is important for rendering to Pixmaps, so if
michael@0: // the format of a visual matches that of the surface, then that visual can be
michael@0: // used for rendering to the surface.  Multiple visuals can match the same
michael@0: // format (but have different GLX properties), so the visual returned may
michael@0: // differ from the visual passed in.  Colormaps are tied to a visual, so
michael@0: // should only be used with their visual.
michael@0: 
michael@0: /* static */ bool
michael@0: DisplayTable::GetColormapAndVisual(Screen* aScreen, XRenderPictFormat* aFormat,
michael@0:                                    Visual* aVisual, Colormap* aColormap,
michael@0:                                    Visual** aVisualForColormap)
michael@0: 
michael@0: {
michael@0:     Display* display = DisplayOfScreen(aScreen);
michael@0: 
michael@0:     // Use the default colormap if the default visual matches.
michael@0:     Visual *defaultVisual = DefaultVisualOfScreen(aScreen);
michael@0:     if (aVisual == defaultVisual
michael@0:         || (aFormat
michael@0:             && aFormat == XRenderFindVisualFormat(display, defaultVisual)))
michael@0:     {
michael@0:         *aColormap = DefaultColormapOfScreen(aScreen);
michael@0:         *aVisualForColormap = defaultVisual;
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     // Only supporting TrueColor non-default visuals
michael@0:     if (!aVisual || aVisual->c_class != TrueColor)
michael@0:         return false;
michael@0: 
michael@0:     if (!sDisplayTable) {
michael@0:         sDisplayTable = new DisplayTable();
michael@0:     }
michael@0: 
michael@0:     nsTArray<DisplayInfo>* displays = &sDisplayTable->mDisplays;
michael@0:     uint32_t d = displays->IndexOf(display, 0, FindDisplay());
michael@0: 
michael@0:     if (d == displays->NoIndex) {
michael@0:         d = displays->Length();
michael@0:         // Register for notification of display closing, when this info
michael@0:         // becomes invalid.
michael@0:         XExtCodes *codes = XAddExtension(display);
michael@0:         if (!codes)
michael@0:             return false;
michael@0: 
michael@0:         XESetCloseDisplay(display, codes->extension, DisplayClosing);
michael@0:         // Add a new DisplayInfo.
michael@0:         displays->AppendElement(display);
michael@0:     }
michael@0: 
michael@0:     nsTArray<ColormapEntry>* entries =
michael@0:         &displays->ElementAt(d).mColormapEntries;
michael@0: 
michael@0:     // Only a small number of formats are expected to be used, so just do a
michael@0:     // simple linear search.
michael@0:     for (uint32_t i = 0; i < entries->Length(); ++i) {
michael@0:         const ColormapEntry& entry = entries->ElementAt(i);
michael@0:         // Only the format and screen need to match.  (The visual may differ.)
michael@0:         // If there is no format (e.g. no RENDER extension) then just compare
michael@0:         // the visual.
michael@0:         if ((aFormat && entry.mFormat == aFormat && entry.mScreen == aScreen)
michael@0:             || aVisual == entry.mVisual) {
michael@0:             *aColormap = entry.mColormap;
michael@0:             *aVisualForColormap = entry.mVisual;
michael@0:             return true;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     // No existing entry.  Create a colormap and add an entry.
michael@0:     Colormap colormap = XCreateColormap(display, RootWindowOfScreen(aScreen),
michael@0:                                         aVisual, AllocNone);
michael@0:     ColormapEntry* newEntry = entries->AppendElement();
michael@0:     newEntry->mFormat = aFormat;
michael@0:     newEntry->mScreen = aScreen;
michael@0:     newEntry->mVisual = aVisual;
michael@0:     newEntry->mColormap = colormap;
michael@0: 
michael@0:     *aColormap = colormap;
michael@0:     *aVisualForColormap = aVisual;
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: /* static */ int
michael@0: DisplayTable::DisplayClosing(Display *display, XExtCodes* codes)
michael@0: {
michael@0:     // No need to free the colormaps explicitly as they will be released when
michael@0:     // the connection is closed.
michael@0:     sDisplayTable->mDisplays.RemoveElement(display, FindDisplay());
michael@0:     if (sDisplayTable->mDisplays.Length() == 0) {
michael@0:         delete sDisplayTable;
michael@0:         sDisplayTable = nullptr;
michael@0:     }
michael@0:     return 0;
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: bool
michael@0: gfxXlibSurface::GetColormapAndVisual(cairo_surface_t* aXlibSurface,
michael@0:                                      Colormap* aColormap, Visual** aVisual)
michael@0: {
michael@0:     XRenderPictFormat* format =
michael@0:         cairo_xlib_surface_get_xrender_format(aXlibSurface);
michael@0:     Screen* screen = cairo_xlib_surface_get_screen(aXlibSurface);
michael@0:     Visual* visual = cairo_xlib_surface_get_visual(aXlibSurface);
michael@0: 
michael@0:     return DisplayTable::GetColormapAndVisual(screen, format, visual,
michael@0:                                               aColormap, aVisual);
michael@0: }
michael@0: 
michael@0: bool
michael@0: gfxXlibSurface::GetColormapAndVisual(Colormap* aColormap, Visual** aVisual)
michael@0: {
michael@0:     if (!mSurfaceValid)
michael@0:         return false;
michael@0: 
michael@0:     return GetColormapAndVisual(CairoSurface(), aColormap, aVisual);
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: int
michael@0: gfxXlibSurface::DepthOfVisual(const Screen* screen, const Visual* visual)
michael@0: {
michael@0:     for (int d = 0; d < screen->ndepths; d++) {
michael@0:         const Depth& d_info = screen->depths[d];
michael@0:         if (visual >= &d_info.visuals[0]
michael@0:             && visual < &d_info.visuals[d_info.nvisuals])
michael@0:             return d_info.depth;
michael@0:     }
michael@0: 
michael@0:     NS_ERROR("Visual not on Screen.");
michael@0:     return 0;
michael@0: }
michael@0:     
michael@0: /* static */
michael@0: Visual*
michael@0: gfxXlibSurface::FindVisual(Screen *screen, gfxImageFormat format)
michael@0: {
michael@0:     int depth;
michael@0:     unsigned long red_mask, green_mask, blue_mask;
michael@0:     switch (format) {
michael@0:         case gfxImageFormat::ARGB32:
michael@0:             depth = 32;
michael@0:             red_mask = 0xff0000;
michael@0:             green_mask = 0xff00;
michael@0:             blue_mask = 0xff;
michael@0:             break;
michael@0:         case gfxImageFormat::RGB24:
michael@0:             depth = 24;
michael@0:             red_mask = 0xff0000;
michael@0:             green_mask = 0xff00;
michael@0:             blue_mask = 0xff;
michael@0:             break;
michael@0:         case gfxImageFormat::RGB16_565:
michael@0:             depth = 16;
michael@0:             red_mask = 0xf800;
michael@0:             green_mask = 0x7e0;
michael@0:             blue_mask = 0x1f;
michael@0:             break;
michael@0:         case gfxImageFormat::A8:
michael@0:         case gfxImageFormat::A1:
michael@0:         default:
michael@0:             return nullptr;
michael@0:     }
michael@0: 
michael@0:     for (int d = 0; d < screen->ndepths; d++) {
michael@0:         const Depth& d_info = screen->depths[d];
michael@0:         if (d_info.depth != depth)
michael@0:             continue;
michael@0: 
michael@0:         for (int v = 0; v < d_info.nvisuals; v++) {
michael@0:             Visual* visual = &d_info.visuals[v];
michael@0: 
michael@0:             if (visual->c_class == TrueColor &&
michael@0:                 visual->red_mask == red_mask &&
michael@0:                 visual->green_mask == green_mask &&
michael@0:                 visual->blue_mask == blue_mask)
michael@0:                 return visual;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     return nullptr;
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: XRenderPictFormat*
michael@0: gfxXlibSurface::FindRenderFormat(Display *dpy, gfxImageFormat format)
michael@0: {
michael@0:     switch (format) {
michael@0:         case gfxImageFormat::ARGB32:
michael@0:             return XRenderFindStandardFormat (dpy, PictStandardARGB32);
michael@0:         case gfxImageFormat::RGB24:
michael@0:             return XRenderFindStandardFormat (dpy, PictStandardRGB24);
michael@0:         case gfxImageFormat::RGB16_565: {
michael@0:             // PictStandardRGB16_565 is not standard Xrender format
michael@0:             // we should try to find related visual
michael@0:             // and find xrender format by visual
michael@0:             Visual *visual = FindVisual(DefaultScreenOfDisplay(dpy), format);
michael@0:             if (!visual)
michael@0:                 return nullptr;
michael@0:             return XRenderFindVisualFormat(dpy, visual);
michael@0:         }
michael@0:         case gfxImageFormat::A8:
michael@0:             return XRenderFindStandardFormat (dpy, PictStandardA8);
michael@0:         case gfxImageFormat::A1:
michael@0:             return XRenderFindStandardFormat (dpy, PictStandardA1);
michael@0:         default:
michael@0:             break;
michael@0:     }
michael@0: 
michael@0:     return nullptr;
michael@0: }
michael@0: 
michael@0: Screen*
michael@0: gfxXlibSurface::XScreen()
michael@0: {
michael@0:     return cairo_xlib_surface_get_screen(CairoSurface());
michael@0: }
michael@0: 
michael@0: XRenderPictFormat*
michael@0: gfxXlibSurface::XRenderFormat()
michael@0: {
michael@0:     return cairo_xlib_surface_get_xrender_format(CairoSurface());
michael@0: }
michael@0: 
michael@0: #if defined(GL_PROVIDER_GLX)
michael@0: GLXPixmap
michael@0: gfxXlibSurface::GetGLXPixmap()
michael@0: {
michael@0:     if (!mGLXPixmap) {
michael@0: #ifdef DEBUG
michael@0:         // cairo_surface_has_show_text_glyphs is used solely for the
michael@0:         // side-effect of setting the error on surface if
michael@0:         // cairo_surface_finish() has been called.
michael@0:         cairo_surface_has_show_text_glyphs(CairoSurface());
michael@0:         NS_ASSERTION(CairoStatus() != CAIRO_STATUS_SURFACE_FINISHED,
michael@0:             "GetGLXPixmap called after surface finished");
michael@0: #endif
michael@0:         mGLXPixmap = gl::sGLXLibrary.CreatePixmap(this);
michael@0:     }
michael@0:     return mGLXPixmap;
michael@0: }
michael@0: #endif
michael@0: 
michael@0: gfxMemoryLocation
michael@0: gfxXlibSurface::GetMemoryLocation() const
michael@0: {
michael@0:     return gfxMemoryLocation::OUT_OF_PROCESS;
michael@0: }