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80 lines
3.2 KiB
C++
80 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFXQTNATIVERENDER_H_
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#define GFXQTNATIVERENDER_H_
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#include "gfxColor.h"
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#include "gfxASurface.h"
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#include "gfxContext.h"
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#include "gfxXlibSurface.h"
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#include "nsRect.h"
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class QRect;
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/**
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* This class lets us take code that draws into an Xlib surface drawable and lets us
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* use it to draw into any Thebes context. The user should subclass this class,
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* override NativeDraw, and then call Draw(). The drawing will be subjected
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* to all Thebes transformations, clipping etc.
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*/
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class THEBES_API gfxQtNativeRenderer {
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public:
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/**
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* Perform the native drawing.
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* @param offsetX draw at this offset into the given drawable
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* @param offsetY draw at this offset into the given drawable
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* @param clipRects an array of rects; clip to the union
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* @param numClipRects the number of rects in the array, or zero if
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* no clipping is required
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*/
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virtual nsresult DrawWithXlib(gfxXlibSurface *xsurf,
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nsIntPoint offset,
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nsIntRect* clipRects, PRUint32 numClipRects) = 0;
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enum {
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// If set, then Draw() is opaque, i.e., every pixel in the intersection
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// of the clipRect and (offset.x,offset.y,bounds.width,bounds.height)
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// will be set and there is no dependence on what the existing pixels
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// in the drawable are set to.
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DRAW_IS_OPAQUE = 0x01,
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// If set, then numClipRects can be zero or one
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DRAW_SUPPORTS_CLIP_RECT = 0x04,
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// If set, then numClipRects can be any value. If neither this
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// nor CLIP_RECT are set, then numClipRects will be zero
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DRAW_SUPPORTS_CLIP_LIST = 0x08,
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// If set, then the visual passed in can be any visual, otherwise the
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// visual passed in must be the default visual for dpy's default screen
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DRAW_SUPPORTS_ALTERNATE_VISUAL = 0x10,
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// If set, then the Screen 'screen' in the callback can be different
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// from the default Screen of the display passed to 'Draw' and can be
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// on a different display.
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DRAW_SUPPORTS_ALTERNATE_SCREEN = 0x20
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};
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struct DrawOutput {
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nsRefPtr<gfxASurface> mSurface;
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bool mUniformAlpha;
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bool mUniformColor;
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gfxRGBA mColor;
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};
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/**
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* @param flags see above
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* @param size Draw()'s drawing is guaranteed to be restricted to
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* the rectangle (offset.x,offset.y,size.width,size.height)
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* @param dpy a display to use for the drawing if ctx doesn't have one
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* @param resultSurface if non-null, we will try to capture a copy of the
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* rendered image into a surface similar to the surface of ctx; if
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* successful, a pointer to the new gfxASurface is stored in *resultSurface,
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* otherwise *resultSurface is set to nullptr.
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*/
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nsresult Draw(gfxContext* ctx, nsIntSize size,
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PRUint32 flags, Screen* screen, Visual* visual,
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DrawOutput* output);
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};
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#endif /*GFXQTNATIVERENDER_H_*/
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