555 lines
16 KiB
C
555 lines
16 KiB
C
/*
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* GDI region objects
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*
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* Copyright 1993, 1994, 1995 Alexandre Julliard
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*/
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#define NO_TRANSITION_TYPES /* This file is Win32-clean */
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#include <stdlib.h>
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#include <stdio.h>
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#include "region.h"
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#include "stddebug.h"
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#include "debug.h"
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/***********************************************************************
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* REGION_DeleteObject
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*/
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BOOL16 REGION_DeleteObject( HRGN32 hrgn, RGNOBJ * obj )
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{
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dprintf_region(stddeb, "DeleteRegion: %04x\n", hrgn );
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if (obj->xrgn) XDestroyRegion( obj->xrgn );
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return GDI_FreeObject( hrgn );
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}
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/***********************************************************************
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* OffsetRgn (GDI.101) (GDI32.256)
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*/
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INT16 OffsetRgn( HRGN32 hrgn, INT32 x, INT32 y )
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{
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RGNOBJ * obj = (RGNOBJ *) GDI_GetObjPtr( hrgn, REGION_MAGIC );
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if (!obj) return ERROR;
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dprintf_region(stddeb, "OffsetRgn: %04x %d,%d\n", hrgn, x, y );
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if (!obj->xrgn) return NULLREGION;
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XOffsetRegion( obj->xrgn, x, y );
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return COMPLEXREGION;
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}
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/***********************************************************************
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* GetRgnBox16 (GDI.134)
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*/
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INT16 GetRgnBox16( HRGN16 hrgn, LPRECT16 rect )
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{
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RGNOBJ * obj = (RGNOBJ *) GDI_GetObjPtr( hrgn, REGION_MAGIC );
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if (!obj) return ERROR;
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dprintf_region(stddeb, "GetRgnBox: %04x\n", hrgn );
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if (!obj->xrgn)
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{
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SetRectEmpty16( rect );
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return NULLREGION;
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}
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else
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{
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XRectangle xrect;
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XClipBox( obj->xrgn, &xrect );
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SetRect16( rect, xrect.x, xrect.y,
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xrect.x + xrect.width, xrect.y + xrect.height);
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return COMPLEXREGION;
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}
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}
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/***********************************************************************
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* GetRgnBox32 (GDI32.219)
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*/
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INT32 GetRgnBox32( HRGN32 hrgn, LPRECT32 rect )
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{
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RECT16 r;
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INT16 ret = GetRgnBox16( hrgn, &r );
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CONV_RECT16TO32( &r, rect );
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return ret;
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}
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/***********************************************************************
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* CreateRectRgn (GDI.64) (GDI32.59)
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*/
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HRGN16 CreateRectRgn( INT32 left, INT32 top, INT32 right, INT32 bottom )
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{
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HRGN16 hrgn;
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RGNOBJ *obj;
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if (!(hrgn = GDI_AllocObject( sizeof(RGNOBJ), REGION_MAGIC ))) return 0;
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obj = (RGNOBJ *) GDI_HEAP_LIN_ADDR( hrgn );
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if ((right > left) && (bottom > top))
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{
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XRectangle rect = { left, top, right - left, bottom - top };
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if (!(obj->xrgn = XCreateRegion()))
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{
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GDI_FreeObject( hrgn );
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return 0;
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}
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XUnionRectWithRegion( &rect, obj->xrgn, obj->xrgn );
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}
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else obj->xrgn = 0;
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dprintf_region( stddeb, "CreateRectRgn(%d,%d-%d,%d): returning %04x\n",
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left, top, right, bottom, hrgn );
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return hrgn;
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}
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/***********************************************************************
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* CreateRectRgnIndirect16 (GDI.65)
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*/
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HRGN16 CreateRectRgnIndirect16( const RECT16* rect )
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{
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return CreateRectRgn( rect->left, rect->top, rect->right, rect->bottom );
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}
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/***********************************************************************
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* CreateRectRgnIndirect32 (GDI32.60)
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*/
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HRGN32 CreateRectRgnIndirect32( const RECT32* rect )
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{
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return CreateRectRgn( rect->left, rect->top, rect->right, rect->bottom );
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}
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/***********************************************************************
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* SetRectRgn (GDI.172) (GDI32.332)
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*/
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VOID SetRectRgn( HRGN32 hrgn, INT32 left, INT32 top, INT32 right, INT32 bottom)
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{
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RGNOBJ * obj;
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dprintf_region(stddeb, "SetRectRgn: %04x %d,%d-%d,%d\n",
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hrgn, left, top, right, bottom );
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if (!(obj = (RGNOBJ *) GDI_GetObjPtr( hrgn, REGION_MAGIC ))) return;
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if (obj->xrgn) XDestroyRegion( obj->xrgn );
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if ((right > left) && (bottom > top))
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{
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XRectangle rect = { left, top, right - left, bottom - top };
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if ((obj->xrgn = XCreateRegion()) != 0)
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XUnionRectWithRegion( &rect, obj->xrgn, obj->xrgn );
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}
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else obj->xrgn = 0;
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}
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/***********************************************************************
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* CreateRoundRectRgn (GDI.444) (GDI32.61)
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*/
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HRGN16 CreateRoundRectRgn( INT32 left, INT32 top, INT32 right, INT32 bottom,
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INT32 ellipse_width, INT32 ellipse_height )
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{
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RGNOBJ * obj;
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HRGN16 hrgn;
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XRectangle rect;
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int asq, bsq, d, xd, yd;
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/* Check if we can do a normal rectangle instead */
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if ((right <= left) || (bottom <= top) ||
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(ellipse_width <= 0) || (ellipse_height <= 0))
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return CreateRectRgn( left, top, right, bottom );
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/* Create region */
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if (!(hrgn = GDI_AllocObject( sizeof(RGNOBJ), REGION_MAGIC ))) return 0;
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obj = (RGNOBJ *) GDI_HEAP_LIN_ADDR( hrgn );
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obj->xrgn = XCreateRegion();
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dprintf_region(stddeb,"CreateRoundRectRgn(%d,%d-%d,%d %dx%d): return=%04x\n",
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left, top, right, bottom, ellipse_width, ellipse_height, hrgn );
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/* Check parameters */
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if (ellipse_width > right-left) ellipse_width = right-left;
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if (ellipse_height > bottom-top) ellipse_height = bottom-top;
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/* Ellipse algorithm, based on an article by K. Porter */
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/* in DDJ Graphics Programming Column, 8/89 */
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asq = ellipse_width * ellipse_width / 4; /* a^2 */
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bsq = ellipse_height * ellipse_height / 4; /* b^2 */
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d = bsq - asq * ellipse_height / 2 + asq / 4; /* b^2 - a^2b + a^2/4 */
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xd = 0;
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yd = asq * ellipse_height; /* 2a^2b */
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rect.x = left + ellipse_width / 2;
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rect.width = right - left - ellipse_width;
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rect.height = 1;
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/* Loop to draw first half of quadrant */
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while (xd < yd)
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{
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if (d > 0) /* if nearest pixel is toward the center */
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{
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/* move toward center */
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rect.y = top++;
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XUnionRectWithRegion( &rect, obj->xrgn, obj->xrgn );
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rect.y = --bottom;
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XUnionRectWithRegion( &rect, obj->xrgn, obj->xrgn );
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yd -= 2*asq;
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d -= yd;
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}
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rect.x--; /* next horiz point */
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rect.width += 2;
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xd += 2*bsq;
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d += bsq + xd;
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}
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/* Loop to draw second half of quadrant */
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d += (3 * (asq-bsq) / 2 - (xd+yd)) / 2;
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while (yd >= 0)
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{
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/* next vertical point */
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rect.y = top++;
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XUnionRectWithRegion( &rect, obj->xrgn, obj->xrgn );
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rect.y = --bottom;
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XUnionRectWithRegion( &rect, obj->xrgn, obj->xrgn );
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if (d < 0) /* if nearest pixel is outside ellipse */
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{
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rect.x--; /* move away from center */
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rect.width += 2;
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xd += 2*bsq;
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d += xd;
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}
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yd -= 2*asq;
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d += asq - yd;
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}
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/* Add the inside rectangle */
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if (top <= bottom)
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{
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rect.y = top;
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rect.height = bottom - top + 1;
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XUnionRectWithRegion( &rect, obj->xrgn, obj->xrgn );
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}
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return hrgn;
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}
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/***********************************************************************
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* CreateEllipticRgn (GDI.54) (GDI32.39)
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*/
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HRGN16 CreateEllipticRgn( INT32 left, INT32 top, INT32 right, INT32 bottom )
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{
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return CreateRoundRectRgn( left, top, right, bottom,
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right-left, bottom-top );
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}
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/***********************************************************************
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* CreateEllipticRgnIndirect16 (GDI.55)
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*/
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HRGN16 CreateEllipticRgnIndirect16( const RECT16 *rect )
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{
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return CreateRoundRectRgn(rect->left, rect->top, rect->right, rect->bottom,
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rect->right-rect->left, rect->bottom-rect->top );
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}
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/***********************************************************************
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* CreateEllipticRgnIndirect32 (GDI32.40)
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*/
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HRGN32 CreateEllipticRgnIndirect32( const RECT32 *rect )
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{
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return CreateRoundRectRgn(rect->left, rect->top, rect->right, rect->bottom,
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rect->right-rect->left, rect->bottom-rect->top );
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}
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/***********************************************************************
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* CreatePolygonRgn16 (GDI.63)
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*/
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HRGN16 CreatePolygonRgn16( const POINT16 * points, INT16 count, INT16 mode )
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{
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return CreatePolyPolygonRgn16( points, &count, 1, mode );
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}
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/***********************************************************************
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* CreatePolyPolygonRgn16 (GDI.451)
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*/
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HRGN16 CreatePolyPolygonRgn16( const POINT16 * points, const INT16 * count,
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INT16 nbpolygons, INT16 mode )
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{
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RGNOBJ * obj;
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HRGN16 hrgn;
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int i, j, maxPoints;
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XPoint *xpoints, *pt;
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Region xrgn;
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/* Allocate points array */
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if (!nbpolygons) return 0;
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for (i = maxPoints = 0; i < nbpolygons; i++)
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if (maxPoints < count[i]) maxPoints = count[i];
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if (!maxPoints) return 0;
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if (!(xpoints = (XPoint *) malloc( sizeof(XPoint) * maxPoints )))
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return 0;
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/* Allocate region */
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if (!(hrgn = GDI_AllocObject( sizeof(RGNOBJ), REGION_MAGIC )))
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{
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free( xpoints );
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return 0;
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}
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obj = (RGNOBJ *) GDI_HEAP_LIN_ADDR( hrgn );
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obj->xrgn = 0;
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dprintf_region(stddeb, "CreatePolyPolygonRgn: %d polygons, returning %04x\n",
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nbpolygons, hrgn );
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/* Create X region */
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for (i = 0; i < nbpolygons; i++, count++)
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{
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for (j = *count, pt = xpoints; j > 0; j--, points++, pt++)
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{
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pt->x = points->x;
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pt->y = points->y;
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}
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xrgn = XPolygonRegion( xpoints, *count,
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(mode == WINDING) ? WindingRule : EvenOddRule );
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if (!xrgn)
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{
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if (obj->xrgn) XDestroyRegion( obj->xrgn );
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free( xpoints );
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GDI_FreeObject( hrgn );
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return 0;
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}
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if (i > 0)
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{
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Region tmprgn = XCreateRegion();
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if (mode == WINDING) XUnionRegion( xrgn, obj->xrgn, tmprgn );
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else XXorRegion( xrgn, obj->xrgn, tmprgn );
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XDestroyRegion( obj->xrgn );
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obj->xrgn = tmprgn;
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}
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else obj->xrgn = xrgn;
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}
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free( xpoints );
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return hrgn;
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}
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/***********************************************************************
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* PtInRegion (GDI.161) (GDI32.278)
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*/
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BOOL16 PtInRegion( HRGN32 hrgn, INT32 x, INT32 y )
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{
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RGNOBJ * obj;
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if (!(obj = (RGNOBJ *) GDI_GetObjPtr( hrgn, REGION_MAGIC ))) return FALSE;
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if (!obj->xrgn) return FALSE;
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return XPointInRegion( obj->xrgn, x, y );
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}
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/***********************************************************************
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* RectInRegion16 (GDI.181)
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*/
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BOOL16 RectInRegion16( HRGN16 hrgn, const RECT16 *rect )
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{
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RGNOBJ * obj;
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if (!(obj = (RGNOBJ *) GDI_GetObjPtr( hrgn, REGION_MAGIC ))) return FALSE;
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if (!obj->xrgn) return FALSE;
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return (XRectInRegion( obj->xrgn, rect->left, rect->top,
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rect->right-rect->left,
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rect->bottom-rect->top ) != RectangleOut);
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}
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/***********************************************************************
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* RectInRegion32 (GDI32.281)
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*/
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BOOL32 RectInRegion32( HRGN32 hrgn, const RECT32 *rect )
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{
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RGNOBJ * obj;
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if (!(obj = (RGNOBJ *) GDI_GetObjPtr( hrgn, REGION_MAGIC ))) return FALSE;
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if (!obj->xrgn) return FALSE;
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return (XRectInRegion( obj->xrgn, rect->left, rect->top,
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rect->right-rect->left,
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rect->bottom-rect->top ) != RectangleOut);
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}
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/***********************************************************************
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* EqualRgn (GDI.72) (GDI32.90)
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*/
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BOOL16 EqualRgn( HRGN32 rgn1, HRGN32 rgn2 )
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{
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RGNOBJ *obj1, *obj2;
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if (!(obj1 = (RGNOBJ *) GDI_GetObjPtr( rgn1, REGION_MAGIC ))) return FALSE;
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if (!(obj2 = (RGNOBJ *) GDI_GetObjPtr( rgn2, REGION_MAGIC ))) return FALSE;
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if (!obj1->xrgn || !obj2->xrgn) return (!obj1->xrgn && !obj2->xrgn);
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return XEqualRegion( obj1->xrgn, obj2->xrgn );
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}
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/***********************************************************************
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* REGION_CopyRegion
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*
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* Copy region src into dest.
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*/
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static int REGION_CopyRegion( RGNOBJ *src, RGNOBJ *dest )
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{
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Region tmprgn;
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if (src->xrgn)
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{
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if (src->xrgn == dest->xrgn) return COMPLEXREGION;
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tmprgn = XCreateRegion();
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if (!dest->xrgn) dest->xrgn = XCreateRegion();
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XUnionRegion( tmprgn, src->xrgn, dest->xrgn );
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XDestroyRegion( tmprgn );
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return COMPLEXREGION;
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}
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else
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{
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if (dest->xrgn) XDestroyRegion( dest->xrgn );
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dest->xrgn = 0;
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return NULLREGION;
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}
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}
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/***********************************************************************
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* REGION_UnionRectWithRgn
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*
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* Add rectangle to region
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*/
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BOOL16 REGION_UnionRectWithRgn( HRGN32 hRgn, LPRECT16 rc )
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{
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RGNOBJ *rgnObj = (RGNOBJ*) GDI_GetObjPtr( hRgn, REGION_MAGIC );
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XRectangle rect = { rc->left, rc->top, rc->right - rc->left, rc->bottom - rc->top };
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BOOL16 ret = 0;
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if( rgnObj )
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{
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if( !rgnObj->xrgn )
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{
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if (!(rgnObj->xrgn = XCreateRegion()))
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{
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GDI_FreeObject( hRgn );
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return 0;
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}
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ret = SIMPLEREGION;
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}
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else
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ret = COMPLEXREGION;
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XUnionRectWithRegion( &rect, rgnObj->xrgn, rgnObj->xrgn );
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}
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return ret;
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}
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/***********************************************************************
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* REGION_CreateFrameRgn
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*
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* Create a region that is a frame around another region
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*/
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BOOL16 REGION_FrameRgn( HRGN32 hDest, HRGN32 hSrc, INT32 x, INT32 y )
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{
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RGNOBJ *destObj,*srcObj;
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Region result;
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destObj = (RGNOBJ*) GDI_GetObjPtr( hDest, REGION_MAGIC );
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srcObj = (RGNOBJ*) GDI_GetObjPtr( hSrc, REGION_MAGIC );
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if (!srcObj->xrgn) return 0;
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REGION_CopyRegion( srcObj, destObj );
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XShrinkRegion( destObj->xrgn, -x, -y );
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result = XCreateRegion();
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XSubtractRegion( destObj->xrgn, srcObj->xrgn, result );
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XDestroyRegion( destObj->xrgn );
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destObj->xrgn = result;
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return 1;
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}
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/***********************************************************************
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* CombineRgn (GDI.451) (GDI32.19)
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*
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* The behavior is correct even if src and dest regions are the same.
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*/
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INT16 CombineRgn( HRGN32 hDest, HRGN32 hSrc1, HRGN32 hSrc2, INT32 mode )
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{
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RGNOBJ *destObj, *src1Obj, *src2Obj;
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Region destrgn;
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dprintf_region(stddeb, "CombineRgn: %04x,%04x -> %04x mode=%x\n",
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hSrc1, hSrc2, hDest, mode );
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if (!(destObj = (RGNOBJ *) GDI_GetObjPtr( hDest, REGION_MAGIC )))
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return ERROR;
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if (!(src1Obj = (RGNOBJ *) GDI_GetObjPtr( hSrc1, REGION_MAGIC )))
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return ERROR;
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if (mode == RGN_COPY) return REGION_CopyRegion( src1Obj, destObj );
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if (!(src2Obj = (RGNOBJ *) GDI_GetObjPtr( hSrc2, REGION_MAGIC )))
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return ERROR;
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/* Some optimizations for null regions */
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if (!src1Obj->xrgn || !src2Obj->xrgn)
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{
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switch(mode)
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{
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case RGN_DIFF:
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if (src1Obj->xrgn)
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return REGION_CopyRegion( src1Obj, destObj );
|
|
/* else fall through */
|
|
case RGN_AND:
|
|
if (destObj->xrgn) XDestroyRegion( destObj->xrgn );
|
|
destObj->xrgn = 0;
|
|
return NULLREGION;
|
|
case RGN_OR:
|
|
case RGN_XOR:
|
|
if (src1Obj->xrgn)
|
|
return REGION_CopyRegion( src1Obj, destObj );
|
|
else
|
|
return REGION_CopyRegion( src2Obj, destObj );
|
|
default:
|
|
return ERROR;
|
|
}
|
|
}
|
|
|
|
/* Perform the operation with the two X regions */
|
|
|
|
if (!(destrgn = XCreateRegion())) return ERROR;
|
|
switch(mode)
|
|
{
|
|
case RGN_AND:
|
|
XIntersectRegion( src1Obj->xrgn, src2Obj->xrgn, destrgn );
|
|
break;
|
|
case RGN_OR:
|
|
XUnionRegion( src1Obj->xrgn, src2Obj->xrgn, destrgn );
|
|
break;
|
|
case RGN_XOR:
|
|
XXorRegion( src1Obj->xrgn, src2Obj->xrgn, destrgn );
|
|
break;
|
|
case RGN_DIFF:
|
|
XSubtractRegion( src1Obj->xrgn, src2Obj->xrgn, destrgn );
|
|
break;
|
|
default:
|
|
XDestroyRegion( destrgn );
|
|
return ERROR;
|
|
}
|
|
if (destObj->xrgn) XDestroyRegion( destObj->xrgn );
|
|
destObj->xrgn = destrgn;
|
|
if (XEmptyRegion(destObj->xrgn))
|
|
{
|
|
XDestroyRegion( destObj->xrgn );
|
|
destObj->xrgn = 0;
|
|
return NULLREGION;
|
|
}
|
|
return COMPLEXREGION;
|
|
}
|