The Tor Browser: gfx/thebes/gfxGdkNativeRenderer.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef GFXGDKNATIVERENDER_H_

     7 #define GFXGDKNATIVERENDER_H_

     9 #include <gdk/gdk.h>

    10 #include "nsSize.h"

    11 #ifdef MOZ_X11

    12 #include "gfxXlibNativeRenderer.h"

    13 #endif

    15 class gfxContext;

    17 /**

    18  * This class lets us take code that draws into an GDK drawable and lets us

    19  * use it to draw into any Thebes context. The user should subclass this class,

    20  * override DrawWithGDK, and then call Draw(). The drawing will be subjected

    21  * to all Thebes transformations, clipping etc.

    22  */

    23 class gfxGdkNativeRenderer

    24 #ifdef MOZ_X11

    25     : private gfxXlibNativeRenderer

    26 #endif

    27 {

    28 public:

    29     /**

    30      * Perform the native drawing.

    31      * @param offsetX draw at this offset into the given drawable

    32      * @param offsetY draw at this offset into the given drawable

    33      * @param clipRects an array of rects; clip to the union

    34      * @param numClipRects the number of rects in the array, or zero if

    35      * no clipping is required

    36      */

    38 #if (MOZ_WIDGET_GTK == 2)

    39     virtual nsresult DrawWithGDK(GdkDrawable * drawable, gint offsetX,

    40             gint offsetY, GdkRectangle * clipRects, uint32_t numClipRects) = 0;

    41 #endif

    43     enum {

    44         // If set, then Draw() is opaque, i.e., every pixel in the intersection

    45         // of the clipRect and (offset.x,offset.y,bounds.width,bounds.height)

    46         // will be set and there is no dependence on what the existing pixels

    47         // in the drawable are set to.

    48         DRAW_IS_OPAQUE =

    49 #ifdef MOZ_X11

    50             gfxXlibNativeRenderer::DRAW_IS_OPAQUE

    51 #else

    52             0x1

    53 #endif

    54         // If set, then numClipRects can be zero or one.

    55         // If not set, then numClipRects will be zero.

    56         , DRAW_SUPPORTS_CLIP_RECT =

    57 #ifdef MOZ_X11

    58             gfxXlibNativeRenderer::DRAW_SUPPORTS_CLIP_RECT

    59 #else

    60             0x2

    61 #endif

    62     };

    64     /**

    65      * @param flags see above

    66      * @param bounds Draw()'s drawing is guaranteed to be restricted to

    67      * the rectangle (offset.x,offset.y,bounds.width,bounds.height)

    68      * @param dpy a display to use for the drawing if ctx doesn't have one

    69      */

    70 #if (MOZ_WIDGET_GTK == 2)

    71     void Draw(gfxContext* ctx, nsIntSize size,

    72               uint32_t flags, GdkColormap* colormap);

    73 #endif

    75 private:

    76 #ifdef MOZ_X11

    77     // for gfxXlibNativeRenderer:

    78     virtual nsresult DrawWithXlib(cairo_surface_t* surface,

    79                                   nsIntPoint offset,

    80                                   nsIntRect* clipRects, uint32_t numClipRects) MOZ_OVERRIDE;

    82 #if (MOZ_WIDGET_GTK == 2)

    83     GdkColormap *mColormap;

    84 #endif

    85 #endif

    86 };

    88 #endif /*GFXGDKNATIVERENDER_H_*/

The Tor Browser / file revision

gfx/thebes/gfxGdkNativeRenderer.h@97036ab72558

gfx/thebes/gfxGdkNativeRenderer.h