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comparison: gfx/thebes/gfxXlibNativeRenderer.h
gfx/thebes/gfxXlibNativeRenderer.h
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| 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/. */ | |
| 5 | |
| 6 #ifndef GFXXLIBNATIVERENDER_H_ | |
| 7 #define GFXXLIBNATIVERENDER_H_ | |
| 8 | |
| 9 #include "nsPoint.h" | |
| 10 #include "nsRect.h" | |
| 11 #include <X11/Xlib.h> | |
| 12 | |
| 13 namespace mozilla { | |
| 14 namespace gfx { | |
| 15 class DrawTarget; | |
| 16 } | |
| 17 } | |
| 18 | |
| 19 class gfxASurface; | |
| 20 class gfxContext; | |
| 21 struct nsIntRect; | |
| 22 struct nsIntPoint; | |
| 23 struct nsIntSize; | |
| 24 typedef struct _cairo cairo_t; | |
| 25 typedef struct _cairo_surface cairo_surface_t; | |
| 26 | |
| 27 /** | |
| 28 * This class lets us take code that draws into an X drawable and lets us | |
| 29 * use it to draw into any Thebes context. The user should subclass this class, | |
| 30 * override DrawWithXib, and then call Draw(). The drawing will be subjected | |
| 31 * to all Thebes transformations, clipping etc. | |
| 32 */ | |
| 33 class gfxXlibNativeRenderer { | |
| 34 public: | |
| 35 /** | |
| 36 * Perform the native drawing. | |
| 37 * @param surface the cairo_surface_t for drawing. Must be a cairo_xlib_surface_t. | |
| 38 * The extents of this surface do not necessarily cover the | |
| 39 * entire rectangle with size provided to Draw(). | |
| 40 * @param offset draw at this offset into the given drawable | |
| 41 * @param clipRects an array of rectangles; clip to the union. | |
| 42 * Any rectangles provided will be contained by the | |
| 43 * rectangle with size provided to Draw and by the | |
| 44 * surface extents. | |
| 45 * @param numClipRects the number of rects in the array, or zero if | |
| 46 * no clipping is required. | |
| 47 */ | |
| 48 virtual nsresult DrawWithXlib(cairo_surface_t* surface, | |
| 49 nsIntPoint offset, | |
| 50 nsIntRect* clipRects, uint32_t numClipRects) = 0; | |
| 51 | |
| 52 enum { | |
| 53 // If set, then Draw() is opaque, i.e., every pixel in the intersection | |
| 54 // of the clipRect and (offset.x,offset.y,bounds.width,bounds.height) | |
| 55 // will be set and there is no dependence on what the existing pixels | |
| 56 // in the drawable are set to. | |
| 57 DRAW_IS_OPAQUE = 0x01, | |
| 58 // If set, then numClipRects can be zero or one | |
| 59 DRAW_SUPPORTS_CLIP_RECT = 0x04, | |
| 60 // If set, then numClipRects can be any value. If neither this | |
| 61 // nor CLIP_RECT are set, then numClipRects will be zero | |
| 62 DRAW_SUPPORTS_CLIP_LIST = 0x08, | |
| 63 // If set, then the surface in the callback may have any visual; | |
| 64 // otherwise the pixels will have the same format as the visual | |
| 65 // passed to 'Draw'. | |
| 66 DRAW_SUPPORTS_ALTERNATE_VISUAL = 0x10, | |
| 67 // If set, then the Screen 'screen' in the callback can be different | |
| 68 // from the default Screen of the display passed to 'Draw' and can be | |
| 69 // on a different display. | |
| 70 DRAW_SUPPORTS_ALTERNATE_SCREEN = 0x20 | |
| 71 }; | |
| 72 | |
| 73 /** | |
| 74 * @param flags see above | |
| 75 * @param size the size of the rectangle being drawn; | |
| 76 * the caller guarantees that drawing will not extend beyond the rectangle | |
| 77 * (0,0,size.width,size.height). | |
| 78 * @param screen a Screen to use for the drawing if ctx doesn't have one. | |
| 79 * @param visual a Visual to use for the drawing if ctx doesn't have one. | |
| 80 * @param result if non-null, we will try to capture a copy of the | |
| 81 * rendered image into a surface similar to the surface of ctx; if | |
| 82 * successful, a pointer to the new gfxASurface is stored in *resultSurface, | |
| 83 * otherwise *resultSurface is set to nullptr. | |
| 84 */ | |
| 85 void Draw(gfxContext* ctx, nsIntSize size, | |
| 86 uint32_t flags, Screen *screen, Visual *visual); | |
| 87 | |
| 88 private: | |
| 89 bool DrawDirect(gfxContext *ctx, nsIntSize bounds, | |
| 90 uint32_t flags, Screen *screen, Visual *visual); | |
| 91 | |
| 92 bool DrawCairo(cairo_t* cr, nsIntSize size, | |
| 93 uint32_t flags, Screen *screen, Visual *visual); | |
| 94 | |
| 95 void DrawFallback(mozilla::gfx::DrawTarget* dt, gfxContext* ctx, | |
| 96 gfxASurface* aSurface, nsIntSize& size, | |
| 97 nsIntRect& drawingRect, bool canDrawOverBackground, | |
| 98 uint32_t flags, Screen* screen, Visual* visual); | |
| 99 | |
| 100 bool DrawOntoTempSurface(cairo_surface_t *tempXlibSurface, | |
| 101 nsIntPoint offset); | |
| 102 | |
| 103 }; | |
| 104 | |
| 105 #endif /*GFXXLIBNATIVERENDER_H_*/ |
