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comparison: gfx/thebes/gfxQtNativeRenderer.h
gfx/thebes/gfxQtNativeRenderer.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 GFXQTNATIVERENDER_H_ | |
| 7 #define GFXQTNATIVERENDER_H_ | |
| 8 | |
| 9 #include "gfxColor.h" | |
| 10 #include "gfxContext.h" | |
| 11 #include "gfxXlibSurface.h" | |
| 12 | |
| 13 class QRect; | |
| 14 struct nsIntRect; | |
| 15 | |
| 16 /** | |
| 17 * This class lets us take code that draws into an Xlib surface drawable and lets us | |
| 18 * use it to draw into any Thebes context. The user should subclass this class, | |
| 19 * override NativeDraw, and then call Draw(). The drawing will be subjected | |
| 20 * to all Thebes transformations, clipping etc. | |
| 21 */ | |
| 22 class gfxQtNativeRenderer { | |
| 23 public: | |
| 24 /** | |
| 25 * Perform the native drawing. | |
| 26 * @param offsetX draw at this offset into the given drawable | |
| 27 * @param offsetY draw at this offset into the given drawable | |
| 28 * @param clipRects an array of rects; clip to the union | |
| 29 * @param numClipRects the number of rects in the array, or zero if | |
| 30 * no clipping is required | |
| 31 */ | |
| 32 virtual nsresult DrawWithXlib(cairo_surface_t* surface, | |
| 33 nsIntPoint offset, | |
| 34 nsIntRect* clipRects, uint32_t numClipRects) = 0; | |
| 35 | |
| 36 enum { | |
| 37 // If set, then Draw() is opaque, i.e., every pixel in the intersection | |
| 38 // of the clipRect and (offset.x,offset.y,bounds.width,bounds.height) | |
| 39 // will be set and there is no dependence on what the existing pixels | |
| 40 // in the drawable are set to. | |
| 41 DRAW_IS_OPAQUE = 0x01, | |
| 42 // If set, then numClipRects can be zero or one | |
| 43 DRAW_SUPPORTS_CLIP_RECT = 0x04, | |
| 44 // If set, then numClipRects can be any value. If neither this | |
| 45 // nor CLIP_RECT are set, then numClipRects will be zero | |
| 46 DRAW_SUPPORTS_CLIP_LIST = 0x08, | |
| 47 // If set, then the visual passed in can be any visual, otherwise the | |
| 48 // visual passed in must be the default visual for dpy's default screen | |
| 49 DRAW_SUPPORTS_ALTERNATE_VISUAL = 0x10, | |
| 50 // If set, then the Screen 'screen' in the callback can be different | |
| 51 // from the default Screen of the display passed to 'Draw' and can be | |
| 52 // on a different display. | |
| 53 DRAW_SUPPORTS_ALTERNATE_SCREEN = 0x20 | |
| 54 }; | |
| 55 | |
| 56 /** | |
| 57 * @param flags see above | |
| 58 * @param size Draw()'s drawing is guaranteed to be restricted to | |
| 59 * the rectangle (offset.x,offset.y,size.width,size.height) | |
| 60 * @param dpy a display to use for the drawing if ctx doesn't have one | |
| 61 * @param resultSurface if non-null, we will try to capture a copy of the | |
| 62 * rendered image into a surface similar to the surface of ctx; if | |
| 63 * successful, a pointer to the new gfxASurface is stored in *resultSurface, | |
| 64 * otherwise *resultSurface is set to nullptr. | |
| 65 */ | |
| 66 nsresult Draw(gfxContext* ctx, nsIntSize size, | |
| 67 uint32_t flags, Screen* screen, Visual* visual); | |
| 68 }; | |
| 69 | |
| 70 #endif /*GFXQTNATIVERENDER_H_*/ |
