628 lines
17 KiB
C
628 lines
17 KiB
C
/*
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* GDI region objects
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*
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* Copyright 1993 Alexandre Julliard
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*/
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static char Copyright[] = "Copyright Alexandre Julliard, 1993";
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#include <stdlib.h>
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#include <stdio.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include "gdi.h"
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/* GC used for region operations */
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static GC regionGC = 0;
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/***********************************************************************
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* REGION_Init
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*/
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BOOL REGION_Init()
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{
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Pixmap tmpPixmap;
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/* CreateGC needs a drawable */
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tmpPixmap = XCreatePixmap( display, rootWindow, 1, 1, 1 );
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if (tmpPixmap)
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{
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regionGC = XCreateGC( XT_display, tmpPixmap, 0, NULL );
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XFreePixmap( XT_display, tmpPixmap );
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if (!regionGC) return FALSE;
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XSetForeground( XT_display, regionGC, 1 );
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XSetGraphicsExposures( XT_display, regionGC, False );
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return TRUE;
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}
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else return FALSE;
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}
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/***********************************************************************
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* REGION_SetRect
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*
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* Set the bounding box of the region and create the pixmap.
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* The hrgn must be valid.
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*/
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static BOOL REGION_SetRect( HRGN hrgn, LPRECT rect )
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{
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int width, height;
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/* Fill region */
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REGION * region = &((RGNOBJ *)GDI_HEAP_ADDR( hrgn ))->region;
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width = rect->right - rect->left;
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height = rect->bottom - rect->top;
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if ((width <= 0) || (height <= 0))
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{
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region->type = NULLREGION;
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region->box.left = 0;
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region->box.right = 0;
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region->box.top = 0;
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region->box.bottom = 0;
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region->pixmap = 0;
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return TRUE;
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}
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region->type = SIMPLEREGION;
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region->box = *rect;
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/* Create pixmap */
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region->pixmap = XCreatePixmap( display, rootWindow, width, height, 1 );
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if (!region->pixmap) return FALSE;
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/* Fill pixmap */
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XSetFunction( XT_display, regionGC, GXclear );
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XFillRectangle( XT_display, region->pixmap, regionGC,
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0, 0, width, height );
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return TRUE;
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}
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/***********************************************************************
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* REGION_DeleteObject
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*/
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BOOL REGION_DeleteObject( HRGN hrgn, RGNOBJ * obj )
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{
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if (obj->region.pixmap) XFreePixmap( XT_display, obj->region.pixmap );
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return GDI_FreeObject( hrgn );
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}
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/***********************************************************************
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* OffsetRgn (GDI.101)
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*/
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int OffsetRgn( HRGN hrgn, short x, short 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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#ifdef DEBUG_REGION
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printf( "OffsetRgn: %d %d,%d\n", hrgn, x, y );
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#endif
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OffsetRect( &obj->region.box, x, y );
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return obj->region.type;
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}
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/***********************************************************************
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* GetRgnBox (GDI.134)
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*/
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int GetRgnBox( HRGN hrgn, LPRECT 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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#ifdef DEBUG_REGION
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printf( "GetRgnBox: %d\n", hrgn );
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#endif
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*rect = obj->region.box;
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return obj->region.type;
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}
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/***********************************************************************
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* CreateRectRgn (GDI.64)
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*/
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HRGN CreateRectRgn( short left, short top, short right, short bottom )
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{
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RECT rect = { left, top, right, bottom };
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return CreateRectRgnIndirect( &rect );
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}
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/***********************************************************************
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* CreateRectRgnIndirect (GDI.65)
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*/
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HRGN CreateRectRgnIndirect( LPRECT rect )
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{
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RGNOBJ * rgnObj;
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HRGN hrgn;
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#ifdef DEBUG_REGION
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printf( "CreateRectRgnIndirect: %d,%d-%d,%d\n",
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rect->left, rect->top, rect->right, rect->bottom );
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#endif
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/* Create region */
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if (!(hrgn = GDI_AllocObject( sizeof(RGNOBJ), REGION_MAGIC ))) return 0;
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if (!REGION_SetRect( hrgn, rect ))
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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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rgnObj = (RGNOBJ *) GDI_HEAP_ADDR( hrgn );
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/* Fill pixmap */
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if (rgnObj->region.type != NULLREGION)
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{
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int width = rgnObj->region.box.right - rgnObj->region.box.left;
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int height = rgnObj->region.box.bottom - rgnObj->region.box.top;
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XSetFunction( XT_display, regionGC, GXcopy );
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XFillRectangle( XT_display, rgnObj->region.pixmap, regionGC,
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0, 0, width, height );
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}
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return hrgn;
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}
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/***********************************************************************
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* CreateRoundRectRgn (GDI.444)
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*/
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HRGN CreateRoundRectRgn( short left, short top, short right, short bottom,
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short ellipse_width, short ellipse_height )
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{
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RECT rect = { left, top, right, bottom };
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RGNOBJ * rgnObj;
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HRGN hrgn;
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#ifdef DEBUG_REGION
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printf( "CreateRoundRectRgn: %d,%d-%d,%d %dx%d\n",
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left, top, right, bottom, ellipse_width, ellipse_height );
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#endif
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/* Create region */
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if (!(hrgn = GDI_AllocObject( sizeof(RGNOBJ), REGION_MAGIC ))) return 0;
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if (!REGION_SetRect( hrgn, &rect ))
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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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rgnObj = (RGNOBJ *) GDI_HEAP_ADDR( hrgn );
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/* Fill pixmap */
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if (rgnObj->region.type != NULLREGION)
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{
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int width = rgnObj->region.box.right - rgnObj->region.box.left;
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int height = rgnObj->region.box.bottom - rgnObj->region.box.top;
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XSetFunction( XT_display, regionGC, GXcopy );
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XFillRectangle( XT_display, rgnObj->region.pixmap, regionGC,
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0, ellipse_height / 2,
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width, height - ellipse_height );
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XFillRectangle( XT_display, rgnObj->region.pixmap, regionGC,
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ellipse_width / 2, 0,
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width - ellipse_width, height );
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XFillArc( XT_display, rgnObj->region.pixmap, regionGC,
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0, 0,
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ellipse_width, ellipse_height, 0, 360*64 );
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XFillArc( XT_display, rgnObj->region.pixmap, regionGC,
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width - ellipse_width, 0,
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ellipse_width, ellipse_height, 0, 360*64 );
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XFillArc( XT_display, rgnObj->region.pixmap, regionGC,
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0, height - ellipse_height,
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ellipse_width, ellipse_height, 0, 360*64 );
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XFillArc( XT_display, rgnObj->region.pixmap, regionGC,
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width - ellipse_width, height - ellipse_height,
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ellipse_width, ellipse_height, 0, 360*64 );
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}
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return hrgn;
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}
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/***********************************************************************
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* SetRectRgn (GDI.172)
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*/
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void SetRectRgn( HRGN hrgn, short left, short top, short right, short bottom )
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{
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RECT rect = { left, top, right, bottom };
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RGNOBJ * rgnObj;
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#ifdef DEBUG_REGION
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printf( "SetRectRgn: %d %d,%d-%d,%d\n", hrgn, left, top, right, bottom );
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#endif
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/* Free previous pixmap */
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if (!(rgnObj = (RGNOBJ *) GDI_GetObjPtr( hrgn, REGION_MAGIC ))) return;
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if (rgnObj->region.pixmap)
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XFreePixmap( XT_display, rgnObj->region.pixmap );
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if (!REGION_SetRect( hrgn, &rect )) return;
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/* Fill pixmap */
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if (rgnObj->region.type != NULLREGION)
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{
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int width = rgnObj->region.box.right - rgnObj->region.box.left;
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int height = rgnObj->region.box.bottom - rgnObj->region.box.top;
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XSetFunction( XT_display, regionGC, GXcopy );
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XFillRectangle( XT_display, rgnObj->region.pixmap, regionGC,
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0, 0, width, height );
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}
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}
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/***********************************************************************
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* CreateEllipticRgn (GDI.54)
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*/
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HRGN CreateEllipticRgn( short left, short top, short right, short bottom )
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{
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RECT rect = { left, top, right, bottom };
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return CreateEllipticRgnIndirect( &rect );
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}
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/***********************************************************************
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* CreateEllipticRgnIndirect (GDI.55)
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*/
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HRGN CreateEllipticRgnIndirect( LPRECT rect )
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{
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RGNOBJ * rgnObj;
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HRGN hrgn;
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#ifdef DEBUG_REGION
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printf( "CreateEllipticRgnIndirect: %d,%d-%d,%d\n",
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rect->left, rect->top, rect->right, rect->bottom );
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#endif
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/* Create region */
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if (!(hrgn = GDI_AllocObject( sizeof(RGNOBJ), REGION_MAGIC ))) return 0;
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if (!REGION_SetRect( hrgn, rect ))
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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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rgnObj = (RGNOBJ *) GDI_HEAP_ADDR( hrgn );
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/* Fill pixmap */
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if (rgnObj->region.type != NULLREGION)
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{
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int width = rgnObj->region.box.right - rgnObj->region.box.left;
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int height = rgnObj->region.box.bottom - rgnObj->region.box.top;
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XSetFunction( XT_display, regionGC, GXcopy );
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XFillArc( XT_display, rgnObj->region.pixmap, regionGC,
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0, 0, width, height, 0, 360*64 );
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}
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return hrgn;
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}
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/***********************************************************************
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* CreatePolygonRgn (GDI.63)
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*/
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HRGN CreatePolygonRgn( POINT * points, short count, short mode )
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{
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return CreatePolyPolygonRgn( points, &count, 1, mode );
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}
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/***********************************************************************
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* CreatePolyPolygonRgn (GDI.451)
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*/
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HRGN CreatePolyPolygonRgn( POINT * points, short * count,
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short nbpolygons, short mode )
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{
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RGNOBJ * rgnObj;
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HRGN hrgn;
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RECT box;
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int i, j, totalPoints;
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POINT * pt;
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XPoint * xpoints;
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if (!nbpolygons) return 0;
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#ifdef DEBUG_REGION
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printf( "CreatePolyPolygonRgn: %d polygons\n", nbpolygons );
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#endif
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/* Find bounding box */
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box.top = box.left = 32767;
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box.right = box.bottom = 0;
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for (i = totalPoints = 0, pt = points; i < nbpolygons; i++)
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{
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totalPoints += count[i];
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for (j = 0; j < count[i]; j++, pt++)
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{
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if (pt->x < box.left) box.left = pt->x;
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if (pt->x > box.right) box.right = pt->x;
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if (pt->y < box.top) box.top = pt->y;
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if (pt->y > box.bottom) box.bottom = pt->y;
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}
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}
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if (!totalPoints) return 0;
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/* Build points array */
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xpoints = (XPoint *) malloc( sizeof(XPoint) * totalPoints );
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if (!xpoints) return 0;
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for (i = 0, pt = points; i < totalPoints; i++, pt++)
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{
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xpoints[i].x = pt->x - box.left;
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xpoints[i].y = pt->y - box.top;
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}
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/* Create region */
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if (!(hrgn = GDI_AllocObject( sizeof(RGNOBJ), REGION_MAGIC )) ||
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!REGION_SetRect( hrgn, &box ))
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{
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if (hrgn) GDI_FreeObject( hrgn );
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free( xpoints );
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return 0;
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}
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rgnObj = (RGNOBJ *) GDI_HEAP_ADDR( hrgn );
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/* Fill pixmap */
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if (rgnObj->region.type != NULLREGION)
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{
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XSetFunction( XT_display, regionGC, GXcopy );
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if (mode == WINDING) XSetFillRule( XT_display, regionGC, WindingRule );
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else XSetFillRule( XT_display, regionGC, EvenOddRule );
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for (i = j = 0; i < nbpolygons; i++)
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{
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XFillPolygon( XT_display, rgnObj->region.pixmap, regionGC,
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&xpoints[j], count[i], Complex, CoordModeOrigin );
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j += count[i];
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}
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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)
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*/
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BOOL PtInRegion( HRGN hrgn, short x, short y )
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{
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XImage * image;
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BOOL res;
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RGNOBJ * obj;
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POINT pt = { x, y };
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if (!(obj = (RGNOBJ *) GDI_GetObjPtr( hrgn, REGION_MAGIC ))) return FALSE;
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if (!PtInRect( &obj->region.box, pt )) return FALSE;
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image = XGetImage( XT_display, obj->region.pixmap,
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x - obj->region.box.left, y - obj->region.box.top,
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1, 1, AllPlanes, ZPixmap );
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if (!image) return FALSE;
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res = (XGetPixel( image, 0, 0 ) != 0);
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XDestroyImage( image );
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return res;
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}
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/***********************************************************************
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* RectInRegion (GDI.181)
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*/
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BOOL RectInRegion( HRGN hrgn, LPRECT rect )
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{
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XImage * image;
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RGNOBJ * obj;
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RECT intersect;
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int x, y;
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if (!(obj = (RGNOBJ *) GDI_GetObjPtr( hrgn, REGION_MAGIC ))) return FALSE;
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if (!IntersectRect( &intersect, &obj->region.box, rect )) return FALSE;
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image = XGetImage( XT_display, obj->region.pixmap,
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intersect.left - obj->region.box.left,
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intersect.top - obj->region.box.top,
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intersect.right - intersect.left,
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intersect.bottom - intersect.top,
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AllPlanes, ZPixmap );
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if (!image) return FALSE;
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for (y = 0; y < image->height; y++)
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for (x = 0; x < image->width; x++)
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if (XGetPixel( image, x, y ) != 0)
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{
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XDestroyImage( image );
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return TRUE;
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}
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XDestroyImage( image );
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return FALSE;
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}
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/***********************************************************************
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* EqualRgn (GDI.72)
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*/
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BOOL EqualRgn( HRGN rgn1, HRGN rgn2 )
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{
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RGNOBJ *obj1, *obj2;
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XImage *image1, *image2;
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int width, height, x, y;
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/* Compare bounding boxes */
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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->region.type == NULLREGION)
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return (obj2->region.type == NULLREGION);
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else if (obj2->region.type == NULLREGION) return FALSE;
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if (!EqualRect( &obj1->region.box, &obj2->region.box )) return FALSE;
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/* Get pixmap contents */
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width = obj1->region.box.right - obj1->region.box.left;
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height = obj1->region.box.bottom - obj1->region.box.top;
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image1 = XGetImage( XT_display, obj1->region.pixmap,
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0, 0, width, height, AllPlanes, ZPixmap );
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if (!image1) return FALSE;
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image2 = XGetImage( XT_display, obj2->region.pixmap,
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0, 0, width, height, AllPlanes, ZPixmap );
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if (!image2)
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{
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XDestroyImage( image1 );
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return FALSE;
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}
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/* Compare pixmaps */
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for (y = 0; y < height; y++)
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for (x = 0; x < width; x++)
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if (XGetPixel( image1, x, y ) != XGetPixel( image2, x, y))
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{
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XDestroyImage( image1 );
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XDestroyImage( image2 );
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return FALSE;
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}
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XDestroyImage( image1 );
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XDestroyImage( image2 );
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return TRUE;
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}
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/***********************************************************************
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* REGION_CopyIntersection
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*
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* Copy to dest->pixmap the area of src->pixmap delimited by
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* the intersection of dest and src regions, using the current GC function.
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*/
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void REGION_CopyIntersection( REGION * dest, REGION * src )
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{
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RECT inter;
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if (!IntersectRect( &inter, &dest->box, &src->box )) return;
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XCopyArea( XT_display, src->pixmap, dest->pixmap, regionGC,
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inter.left - src->box.left, inter.top - src->box.top,
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inter.right - inter.left, inter.bottom - inter.top,
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inter.left - dest->box.left, inter.top - dest->box.top );
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}
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/***********************************************************************
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* CombineRgn (GDI.451)
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*/
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int CombineRgn( HRGN hDest, HRGN hSrc1, HRGN hSrc2, short mode )
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{
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RGNOBJ *destObj, *src1Obj, *src2Obj;
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REGION * region;
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int width, height;
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BOOL res;
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#ifdef DEBUG_REGION
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printf( "CombineRgn: %d %d %d %d\n", hDest, hSrc1, hSrc2, mode );
|
|
#endif
|
|
|
|
if (!(destObj = (RGNOBJ *) GDI_GetObjPtr( hDest, REGION_MAGIC )))
|
|
return ERROR;
|
|
if (!(src1Obj = (RGNOBJ *) GDI_GetObjPtr( hSrc1, REGION_MAGIC )))
|
|
return ERROR;
|
|
if (mode != RGN_COPY)
|
|
if (!(src2Obj = (RGNOBJ *) GDI_GetObjPtr( hSrc2, REGION_MAGIC )))
|
|
return ERROR;
|
|
region = &destObj->region;
|
|
|
|
switch(mode)
|
|
{
|
|
case RGN_AND:
|
|
res = IntersectRect( ®ion->box, &src1Obj->region.box,
|
|
&src2Obj->region.box );
|
|
region->type = COMPLEXREGION;
|
|
break;
|
|
|
|
case RGN_OR:
|
|
case RGN_XOR:
|
|
res = UnionRect( ®ion->box, &src1Obj->region.box,
|
|
&src2Obj->region.box );
|
|
region->type = COMPLEXREGION;
|
|
break;
|
|
|
|
case RGN_DIFF:
|
|
res = SubtractRect( ®ion->box, &src1Obj->region.box,
|
|
&src2Obj->region.box );
|
|
region->type = COMPLEXREGION;
|
|
break;
|
|
|
|
case RGN_COPY:
|
|
region->box = src1Obj->region.box;
|
|
region->type = src1Obj->region.type;
|
|
res = (region->type != NULLREGION);
|
|
break;
|
|
|
|
default:
|
|
return ERROR;
|
|
}
|
|
|
|
if (region->pixmap) XFreePixmap( XT_display, region->pixmap );
|
|
if (!res)
|
|
{
|
|
region->type = NULLREGION;
|
|
region->pixmap = 0;
|
|
return NULLREGION;
|
|
}
|
|
|
|
width = region->box.right - region->box.left;
|
|
height = region->box.bottom - region->box.top;
|
|
if (!width || !height)
|
|
{
|
|
printf( "CombineRgn: width or height is 0. Please report this.\n" );
|
|
printf( "src1=%d,%d-%d,%d src2=%d,%d-%d,%d dst=%d,%d-%d,%d op=%d\n",
|
|
src1Obj->region.box.left, src1Obj->region.box.top,
|
|
src1Obj->region.box.right, src1Obj->region.box.bottom,
|
|
src2Obj->region.box.left, src2Obj->region.box.top,
|
|
src2Obj->region.box.right, src2Obj->region.box.bottom,
|
|
region->box.left, region->box.top,
|
|
region->box.right, region->box.bottom, mode );
|
|
exit(1);
|
|
}
|
|
region->pixmap = XCreatePixmap( display, rootWindow, width, height, 1 );
|
|
|
|
switch(mode)
|
|
{
|
|
case RGN_AND:
|
|
XSetFunction( XT_display, regionGC, GXcopy );
|
|
REGION_CopyIntersection( region, &src1Obj->region );
|
|
XSetFunction( XT_display, regionGC, GXand );
|
|
REGION_CopyIntersection( region, &src2Obj->region );
|
|
break;
|
|
|
|
case RGN_OR:
|
|
case RGN_XOR:
|
|
XSetFunction( XT_display, regionGC, GXclear );
|
|
XFillRectangle( XT_display, region->pixmap, regionGC,
|
|
0, 0, width, height );
|
|
XSetFunction( XT_display, regionGC, (mode == RGN_OR) ? GXor : GXxor);
|
|
REGION_CopyIntersection( region, &src1Obj->region );
|
|
REGION_CopyIntersection( region, &src2Obj->region );
|
|
break;
|
|
|
|
case RGN_DIFF:
|
|
XSetFunction( XT_display, regionGC, GXclear );
|
|
XFillRectangle( XT_display, region->pixmap, regionGC,
|
|
0, 0, width, height );
|
|
XSetFunction( XT_display, regionGC, GXcopy );
|
|
REGION_CopyIntersection( region, &src1Obj->region );
|
|
XSetFunction( XT_display, regionGC, GXandInverted );
|
|
REGION_CopyIntersection( region, &src2Obj->region );
|
|
break;
|
|
|
|
case RGN_COPY:
|
|
XSetFunction( XT_display, regionGC, GXcopy );
|
|
XCopyArea( XT_display, src1Obj->region.pixmap, region->pixmap,
|
|
regionGC, 0, 0, width, height, 0, 0 );
|
|
break;
|
|
}
|
|
return region->type;
|
|
}
|