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138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/* Region-related definitions and prototypes */
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#ifndef _FE_RGN_H_
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#define _FE_RGN_H_
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#ifdef LAYERS
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#include "xp_core.h"
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#include "xp_rect.h"
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/******************Definitions and Types************/
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/* For Windows only: Should we use the MFC CRgn class for region stuff? */
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#ifdef XP_WIN
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#undef FE_RGN_USE_MFC
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#endif /* XP_WIN */
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#ifdef XP_WIN
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#ifdef FE_RGN_USE_MFC
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#define FE_GetMDRegion(rgn) ((CRgn *)rgn)
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#else
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/*
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* Note that the resultant CRgn * does not have to be
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* explicitly deleted. It is considered a temporary object
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* by the MFC and is deleted the next time we have idle
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* time in the event loop.
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*/
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#define FE_GetMDRegion(rgn) ((HRGN)rgn)
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#endif /* FE_RGN_USE_MFC */
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#elif defined(XP_UNIX)
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#define FE_GetMDRegion(rgn) ((Region)rgn)
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#elif defined(XP_MAC)
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#define FE_GetMDRegion(rgn) ((RgnHandle)rgn)
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#else
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#define FE_GetMDRegion(rgn) (rgn)
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#endif /* XP_WIN */
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#ifdef XP_WIN
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#define FE_MAX_REGION_COORDINATE 0x7FFFFFFF
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#else
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#define FE_MAX_REGION_COORDINATE 0x7FFF
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#endif
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/* Setting the clip region to this effectively unsets the clip */
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#define FE_NULL_REGION NULL
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#define FE_CLEAR_REGION(region) \
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do {FE_SubtractRegion((region), (region), (region)); } while (0)
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/* Function called by FE_ForEachRectInRegion */
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typedef void (*FE_RectInRegionFunc)(void *closure, XP_Rect *rect);
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/*******************Prototypes**********************/
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XP_BEGIN_PROTOS
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extern FE_Region FE_CreateRegion(void);
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/* Creates a region from a rectangle. Returns */
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/* NULL if region can't be created. */
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extern FE_Region FE_CreateRectRegion(XP_Rect *rect);
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/* Destroys region. */
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extern void FE_DestroyRegion(FE_Region region);
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/* Makes a copy of a region. If dst is NULL, creates a new region */
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extern FE_Region FE_CopyRegion(FE_Region src, FE_Region dst);
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/* Set an existing region to a rectangle */
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extern FE_Region FE_SetRectRegion(FE_Region region, XP_Rect *rect);
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/* dst = src1 intersect sr2 */
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/* dst can be one of src1 or src2 */
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extern void FE_IntersectRegion(FE_Region src1, FE_Region src2, FE_Region dst);
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/* dst = src1 union src2 */
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/* dst can be one of src1 or src2 */
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extern void FE_UnionRegion(FE_Region src1, FE_Region src2, FE_Region dst);
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/* dst = src1 - src2 */
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/* dst can be one of src1 or src2 */
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extern void FE_SubtractRegion(FE_Region src1, FE_Region src2, FE_Region dst);
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/* Returns TRUE if the region contains no pixels */
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extern XP_Bool FE_IsEmptyRegion(FE_Region region);
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/* Returns the bounding rectangle of the region */
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extern void FE_GetRegionBoundingBox(FE_Region region, XP_Rect *bbox);
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/* TRUE if rgn1 == rgn2 */
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extern XP_Bool FE_IsEqualRegion(FE_Region rgn1, FE_Region rgn2);
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/* Moves a region by the specified offsets */
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extern void FE_OffsetRegion(FE_Region region, int32 xOffset, int32 yOffset);
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/* Is any part of the rectangle in the specified region */
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extern XP_Bool FE_RectInRegion(FE_Region region, XP_Rect *rect);
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/* For each rectangle that makes up this region, call the func */
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extern void FE_ForEachRectInRegion(FE_Region region,
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FE_RectInRegionFunc func,
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void * closure);
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#ifdef DEBUG
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extern void FE_HighlightRect(void *context, XP_Rect *rect, int how_much);
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extern void FE_HighlightRegion(void *context, FE_Region region, int how_much);
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#endif /* DEBUG */
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XP_END_PROTOS
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#endif /* LAYERS */
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#endif /* _FE_RGN_H_ */
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