1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/thebes/gfxXlibNativeRenderer.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,105 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef GFXXLIBNATIVERENDER_H_
1.10 +#define GFXXLIBNATIVERENDER_H_
1.11 +
1.12 +#include "nsPoint.h"
1.13 +#include "nsRect.h"
1.14 +#include <X11/Xlib.h>
1.15 +
1.16 +namespace mozilla {
1.17 +namespace gfx {
1.18 + class DrawTarget;
1.19 +}
1.20 +}
1.21 +
1.22 +class gfxASurface;
1.23 +class gfxContext;
1.24 +struct nsIntRect;
1.25 +struct nsIntPoint;
1.26 +struct nsIntSize;
1.27 +typedef struct _cairo cairo_t;
1.28 +typedef struct _cairo_surface cairo_surface_t;
1.29 +
1.30 +/**
1.31 + * This class lets us take code that draws into an X drawable and lets us
1.32 + * use it to draw into any Thebes context. The user should subclass this class,
1.33 + * override DrawWithXib, and then call Draw(). The drawing will be subjected
1.34 + * to all Thebes transformations, clipping etc.
1.35 + */
1.36 +class gfxXlibNativeRenderer {
1.37 +public:
1.38 + /**
1.39 + * Perform the native drawing.
1.40 + * @param surface the cairo_surface_t for drawing. Must be a cairo_xlib_surface_t.
1.41 + * The extents of this surface do not necessarily cover the
1.42 + * entire rectangle with size provided to Draw().
1.43 + * @param offset draw at this offset into the given drawable
1.44 + * @param clipRects an array of rectangles; clip to the union.
1.45 + * Any rectangles provided will be contained by the
1.46 + * rectangle with size provided to Draw and by the
1.47 + * surface extents.
1.48 + * @param numClipRects the number of rects in the array, or zero if
1.49 + * no clipping is required.
1.50 + */
1.51 + virtual nsresult DrawWithXlib(cairo_surface_t* surface,
1.52 + nsIntPoint offset,
1.53 + nsIntRect* clipRects, uint32_t numClipRects) = 0;
1.54 +
1.55 + enum {
1.56 + // If set, then Draw() is opaque, i.e., every pixel in the intersection
1.57 + // of the clipRect and (offset.x,offset.y,bounds.width,bounds.height)
1.58 + // will be set and there is no dependence on what the existing pixels
1.59 + // in the drawable are set to.
1.60 + DRAW_IS_OPAQUE = 0x01,
1.61 + // If set, then numClipRects can be zero or one
1.62 + DRAW_SUPPORTS_CLIP_RECT = 0x04,
1.63 + // If set, then numClipRects can be any value. If neither this
1.64 + // nor CLIP_RECT are set, then numClipRects will be zero
1.65 + DRAW_SUPPORTS_CLIP_LIST = 0x08,
1.66 + // If set, then the surface in the callback may have any visual;
1.67 + // otherwise the pixels will have the same format as the visual
1.68 + // passed to 'Draw'.
1.69 + DRAW_SUPPORTS_ALTERNATE_VISUAL = 0x10,
1.70 + // If set, then the Screen 'screen' in the callback can be different
1.71 + // from the default Screen of the display passed to 'Draw' and can be
1.72 + // on a different display.
1.73 + DRAW_SUPPORTS_ALTERNATE_SCREEN = 0x20
1.74 + };
1.75 +
1.76 + /**
1.77 + * @param flags see above
1.78 + * @param size the size of the rectangle being drawn;
1.79 + * the caller guarantees that drawing will not extend beyond the rectangle
1.80 + * (0,0,size.width,size.height).
1.81 + * @param screen a Screen to use for the drawing if ctx doesn't have one.
1.82 + * @param visual a Visual to use for the drawing if ctx doesn't have one.
1.83 + * @param result if non-null, we will try to capture a copy of the
1.84 + * rendered image into a surface similar to the surface of ctx; if
1.85 + * successful, a pointer to the new gfxASurface is stored in *resultSurface,
1.86 + * otherwise *resultSurface is set to nullptr.
1.87 + */
1.88 + void Draw(gfxContext* ctx, nsIntSize size,
1.89 + uint32_t flags, Screen *screen, Visual *visual);
1.90 +
1.91 +private:
1.92 + bool DrawDirect(gfxContext *ctx, nsIntSize bounds,
1.93 + uint32_t flags, Screen *screen, Visual *visual);
1.94 +
1.95 + bool DrawCairo(cairo_t* cr, nsIntSize size,
1.96 + uint32_t flags, Screen *screen, Visual *visual);
1.97 +
1.98 + void DrawFallback(mozilla::gfx::DrawTarget* dt, gfxContext* ctx,
1.99 + gfxASurface* aSurface, nsIntSize& size,
1.100 + nsIntRect& drawingRect, bool canDrawOverBackground,
1.101 + uint32_t flags, Screen* screen, Visual* visual);
1.102 +
1.103 + bool DrawOntoTempSurface(cairo_surface_t *tempXlibSurface,
1.104 + nsIntPoint offset);
1.105 +
1.106 +};
1.107 +
1.108 +#endif /*GFXXLIBNATIVERENDER_H_*/
