winemac: Implement ScrollDC().
This commit is contained in:
Ken Thomases
Alexandre Julliard
parent
4126d1d378
commit
6efd198c52
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@ -8,6 +8,7 @@ C_SRCS = \
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gdi.c \
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macdrv_main.c \
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mouse.c \
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scroll.c \
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surface.c \
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window.c
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@ -0,0 +1,188 @@
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/*
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* MACDRV window/DC scrolling
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*
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* Copyright 1993 David W. Metcalfe
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* Copyright 1995, 1996 Alex Korobka
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* Copyright 2001 Alexandre Julliard
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* Copyright 2011, 2013 Ken Thomases for CodeWeavers Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "macdrv.h"
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#include "winuser.h"
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WINE_DEFAULT_DEBUG_CHANNEL(scroll);
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static void dump_region(const char *p, HRGN hrgn)
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{
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DWORD i, size;
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RGNDATA *data = NULL;
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RECT *rect;
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if (!hrgn)
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{
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TRACE("%s null region\n", p);
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return;
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}
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if (!(size = GetRegionData(hrgn, 0, NULL)))
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return;
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if (!(data = HeapAlloc(GetProcessHeap(), 0, size))) return;
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GetRegionData(hrgn, size, data);
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TRACE("%s %d rects:", p, data->rdh.nCount);
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for (i = 0, rect = (RECT *)data->Buffer; i<20 && i < data->rdh.nCount; i++, rect++)
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TRACE(" %s", wine_dbgstr_rect(rect));
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TRACE("\n");
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HeapFree(GetProcessHeap(), 0, data);
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}
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/*************************************************************************
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* ScrollDC (MACDRV.@)
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*/
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BOOL CDECL macdrv_ScrollDC(HDC hdc, INT dx, INT dy, const RECT *lprcScroll,
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const RECT *lprcClip, HRGN hrgnUpdate, LPRECT lprcUpdate)
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{
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RECT rcSrc, rcClip, offset;
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INT dxdev, dydev, res;
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HRGN DstRgn, clipRgn, visrgn;
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TRACE("dx,dy %d,%d rcScroll %s rcClip %s hrgnUpdate %p lprcUpdate %p\n",
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dx, dy, wine_dbgstr_rect(lprcScroll), wine_dbgstr_rect(lprcClip),
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hrgnUpdate, lprcUpdate);
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/* get the visible region */
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visrgn = CreateRectRgn(0, 0, 0, 0);
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GetRandomRgn(hdc, visrgn, SYSRGN);
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if (!(GetVersion() & 0x80000000))
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{
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/* Window NT/2k/XP */
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POINT org;
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GetDCOrgEx(hdc, &org);
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OffsetRgn(visrgn, -org.x, -org.y);
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}
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/* intersect with the clipping Region if the DC has one */
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clipRgn = CreateRectRgn(0, 0, 0, 0);
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if (GetClipRgn(hdc, clipRgn) != 1)
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{
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DeleteObject(clipRgn);
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clipRgn = NULL;
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}
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else
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CombineRgn(visrgn, visrgn, clipRgn, RGN_AND);
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/* only those pixels in the scroll rectangle that remain in the clipping
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* rect are scrolled. */
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if (lprcClip)
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rcClip = *lprcClip;
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else
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GetClipBox(hdc, &rcClip);
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rcSrc = rcClip;
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OffsetRect(&rcClip, -dx, -dy);
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IntersectRect(&rcSrc, &rcSrc, &rcClip);
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/* if an scroll rectangle is specified, only the pixels within that
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* rectangle are scrolled */
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if (lprcScroll)
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IntersectRect(&rcSrc, &rcSrc, lprcScroll);
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/* now convert to device coordinates */
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LPtoDP(hdc, (LPPOINT)&rcSrc, 2);
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TRACE("source rect: %s\n", wine_dbgstr_rect(&rcSrc));
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/* also dx and dy */
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SetRect(&offset, 0, 0, dx, dy);
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LPtoDP(hdc, (LPPOINT)&offset, 2);
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dxdev = offset.right - offset.left;
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dydev = offset.bottom - offset.top;
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/* now intersect with the visible region to get the pixels that will
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* actually scroll */
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DstRgn = CreateRectRgnIndirect(&rcSrc);
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res = CombineRgn(DstRgn, DstRgn, visrgn, RGN_AND);
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/* and translate, giving the destination region */
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OffsetRgn(DstRgn, dxdev, dydev);
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if (TRACE_ON(scroll)) dump_region("Destination scroll region: ", DstRgn);
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/* if there are any, do it */
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if (res > NULLREGION)
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{
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RECT rect ;
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/* clip to the destination region, so we can BitBlt with a simple
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* bounding rectangle */
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if (clipRgn)
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ExtSelectClipRgn(hdc, DstRgn, RGN_AND);
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else
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SelectClipRgn(hdc, DstRgn);
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GetRgnBox(DstRgn, &rect);
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DPtoLP(hdc, (LPPOINT)&rect, 2);
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TRACE("destination rect: %s\n", wine_dbgstr_rect(&rect));
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BitBlt(hdc, rect.left, rect.top,
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rect.right - rect.left, rect.bottom - rect.top,
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hdc, rect.left - dx, rect.top - dy, SRCCOPY);
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}
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/* compute the update areas. This is the combined clip rectangle
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* minus the scrolled region, and intersected with the visible
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* region. */
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if (hrgnUpdate || lprcUpdate)
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{
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HRGN hrgn = hrgnUpdate;
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/* Intersect clip and scroll rectangles, allowing NULL values */
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if (lprcScroll)
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if (lprcClip)
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IntersectRect(&rcClip, lprcClip, lprcScroll);
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else
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rcClip = *lprcScroll;
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else
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if (lprcClip)
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rcClip = *lprcClip;
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else
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GetClipBox(hdc, &rcClip);
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/* Convert the combined clip rectangle to device coordinates */
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LPtoDP(hdc, (LPPOINT)&rcClip, 2);
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if (hrgn)
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SetRectRgn(hrgn, rcClip.left, rcClip.top, rcClip.right, rcClip.bottom);
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else
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hrgn = CreateRectRgnIndirect(&rcClip);
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CombineRgn(hrgn, hrgn, visrgn, RGN_AND);
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CombineRgn(hrgn, hrgn, DstRgn, RGN_DIFF);
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if (TRACE_ON(scroll)) dump_region("Update region: ", hrgn);
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if (lprcUpdate)
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{
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GetRgnBox(hrgn, lprcUpdate);
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/* Put the lprcUpdate in logical coordinates */
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DPtoLP(hdc, (LPPOINT)lprcUpdate, 2);
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TRACE("returning lprcUpdate %s\n", wine_dbgstr_rect(lprcUpdate));
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}
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if (!hrgnUpdate)
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DeleteObject(hrgn);
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}
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/* restore original clipping region */
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SelectClipRgn(hdc, clipRgn);
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DeleteObject(visrgn);
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DeleteObject(DstRgn);
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if (clipRgn) DeleteObject(clipRgn);
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return TRUE;
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}
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@ -10,6 +10,7 @@
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@ cdecl EnumDisplayMonitors(long ptr ptr long) macdrv_EnumDisplayMonitors
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@ cdecl GetMonitorInfo(long ptr) macdrv_GetMonitorInfo
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@ cdecl MsgWaitForMultipleObjectsEx(long ptr long long long) macdrv_MsgWaitForMultipleObjectsEx
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@ cdecl ScrollDC(long long long ptr ptr long ptr) macdrv_ScrollDC
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@ cdecl SetFocus(long) macdrv_SetFocus
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@ cdecl SetLayeredWindowAttributes(long long long long) macdrv_SetLayeredWindowAttributes
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@ cdecl SetParent(long long long) macdrv_SetParent
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