/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef GFXXLIBNATIVERENDER_H_ #define GFXXLIBNATIVERENDER_H_ #include "nsPoint.h" #include "nsRect.h" #include "mozilla/gfx/Rect.h" #include "mozilla/gfx/Point.h" #include <X11/Xlib.h> namespace mozilla { namespace gfx { class DrawTarget; } } class gfxASurface; class gfxContext; typedef struct _cairo cairo_t; typedef struct _cairo_surface cairo_surface_t; /** * This class lets us take code that draws into an X drawable and lets us * use it to draw into any Thebes context. The user should subclass this class, * override DrawWithXib, and then call Draw(). The drawing will be subjected * to all Thebes transformations, clipping etc. */ class gfxXlibNativeRenderer { public: /** * Perform the native drawing. * @param surface the cairo_surface_t for drawing. Must be a cairo_xlib_surface_t. * The extents of this surface do not necessarily cover the * entire rectangle with size provided to Draw(). * @param offset draw at this offset into the given drawable * @param clipRects an array of rectangles; clip to the union. * Any rectangles provided will be contained by the * rectangle with size provided to Draw and by the * surface extents. * @param numClipRects the number of rects in the array, or zero if * no clipping is required. */ virtual nsresult DrawWithXlib(cairo_surface_t* surface, mozilla::gfx::IntPoint offset, mozilla::gfx::IntRect* clipRects, uint32_t numClipRects) = 0; enum { // If set, then Draw() is opaque, i.e., every pixel in the intersection // of the clipRect and (offset.x,offset.y,bounds.width,bounds.height) // will be set and there is no dependence on what the existing pixels // in the drawable are set to. DRAW_IS_OPAQUE = 0x01, // If set, then numClipRects can be zero or one DRAW_SUPPORTS_CLIP_RECT = 0x04, // If set, then numClipRects can be any value. If neither this // nor CLIP_RECT are set, then numClipRects will be zero DRAW_SUPPORTS_CLIP_LIST = 0x08, // If set, then the surface in the callback may have any visual; // otherwise the pixels will have the same format as the visual // passed to 'Draw'. DRAW_SUPPORTS_ALTERNATE_VISUAL = 0x10, // If set, then the Screen 'screen' in the callback can be different // from the default Screen of the display passed to 'Draw' and can be // on a different display. DRAW_SUPPORTS_ALTERNATE_SCREEN = 0x20 }; /** * @param flags see above * @param size the size of the rectangle being drawn; * the caller guarantees that drawing will not extend beyond the rectangle * (0,0,size.width,size.height). * @param screen a Screen to use for the drawing if ctx doesn't have one. * @param visual a Visual to use for the drawing if ctx doesn't have one. * @param result if non-null, we will try to capture a copy of the * rendered image into a surface similar to the surface of ctx; if * successful, a pointer to the new gfxASurface is stored in *resultSurface, * otherwise *resultSurface is set to nullptr. */ void Draw(gfxContext* ctx, mozilla::gfx::IntSize size, uint32_t flags, Screen *screen, Visual *visual); private: bool DrawDirect(mozilla::gfx::DrawTarget* aDT, mozilla::gfx::IntSize bounds, uint32_t flags, Screen *screen, Visual *visual); bool DrawCairo(cairo_t* cr, mozilla::gfx::IntSize size, uint32_t flags, Screen *screen, Visual *visual); void DrawFallback(mozilla::gfx::DrawTarget* dt, gfxContext* ctx, gfxASurface* aSurface, mozilla::gfx::IntSize& size, mozilla::gfx::IntRect& drawingRect, bool canDrawOverBackground, uint32_t flags, Screen* screen, Visual* visual); bool DrawOntoTempSurface(cairo_surface_t *tempXlibSurface, mozilla::gfx::IntPoint offset); }; #endif /*GFXXLIBNATIVERENDER_H_*/