зеркало из https://github.com/mozilla/gecko-dev.git
98 строки
4.0 KiB
C++
98 строки
4.0 KiB
C++
/* -*- 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 "gfxColor.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "nsRect.h"
|
|
#include <X11/Xlib.h>
|
|
|
|
class gfxASurface;
|
|
class gfxXlibSurface;
|
|
class gfxContext;
|
|
|
|
/**
|
|
* 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 THEBES_API gfxXlibNativeRenderer {
|
|
public:
|
|
/**
|
|
* Perform the native drawing.
|
|
* @param surface the drawable for drawing.
|
|
* The extents of this surface do not necessarily cover the
|
|
* entire rectangle with size provided to Draw().
|
|
* @param offsetX draw at this offset into the given drawable
|
|
* @param offsetY 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(gfxXlibSurface* surface,
|
|
nsIntPoint offset,
|
|
nsIntRect* 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
|
|
};
|
|
|
|
struct DrawOutput {
|
|
nsRefPtr<gfxASurface> mSurface;
|
|
bool mUniformAlpha;
|
|
bool mUniformColor;
|
|
gfxRGBA mColor;
|
|
};
|
|
|
|
/**
|
|
* @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, nsIntSize size,
|
|
uint32_t flags, Screen *screen, Visual *visual,
|
|
DrawOutput* result);
|
|
|
|
private:
|
|
bool DrawDirect(gfxContext *ctx, nsIntSize bounds,
|
|
uint32_t flags, Screen *screen, Visual *visual);
|
|
|
|
bool DrawOntoTempSurface(gfxXlibSurface *tempXlibSurface,
|
|
nsIntPoint offset);
|
|
|
|
};
|
|
|
|
#endif /*GFXXLIBNATIVERENDER_H_*/
|