wine/dlls/ddraw/clipper.c

/* DirectDrawClipper implementation
 *
 * Copyright 2000 (c) Marcus Meissner
 * Copyright 2000 (c) TransGaming Technologies Inc.
 * Copyright 2006 (c) Stefan Dösinger
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include "wine/port.h"

#include "ddraw_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(ddraw);

static inline struct ddraw_clipper *impl_from_IDirectDrawClipper(IDirectDrawClipper *iface)
{
    return CONTAINING_RECORD(iface, struct ddraw_clipper, IDirectDrawClipper_iface);
}

static HRESULT WINAPI ddraw_clipper_QueryInterface(IDirectDrawClipper *iface, REFIID iid, void **object)
{
    struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);

    TRACE("iface %p, iid %s, object %p.\n", iface, debugstr_guid(iid), object);

    if (IsEqualGUID(&IID_IDirectDrawClipper, iid)
            || IsEqualGUID(&IID_IUnknown, iid))
    {
        IDirectDrawClipper_AddRef(&clipper->IDirectDrawClipper_iface);
        *object = &clipper->IDirectDrawClipper_iface;
        return S_OK;
    }

    WARN("%s not implemented, returning E_NOINTERFACE.\n", debugstr_guid(iid));
    *object = NULL;

    return E_NOINTERFACE;
}

static ULONG WINAPI ddraw_clipper_AddRef(IDirectDrawClipper *iface)
{
    struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
    ULONG refcount = InterlockedIncrement(&clipper->ref);

    TRACE("%p increasing refcount to %u.\n", clipper, refcount);

    return refcount;
}

static ULONG WINAPI ddraw_clipper_Release(IDirectDrawClipper *iface)
{
    struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
    ULONG refcount = InterlockedDecrement(&clipper->ref);

    TRACE("%p decreasing refcount to %u.\n", clipper, refcount);

    if (!refcount)
        HeapFree(GetProcessHeap(), 0, clipper);

    return refcount;
}

static HRESULT WINAPI ddraw_clipper_SetHWnd(IDirectDrawClipper *iface, DWORD flags, HWND window)
{
    struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);

    TRACE("iface %p, flags %#x, window %p.\n", iface, flags, window);

    if (flags)
    {
        FIXME("flags %#x, not supported.\n", flags);
        return DDERR_INVALIDPARAMS;
    }

    wined3d_mutex_lock();
    clipper->window = window;
    wined3d_mutex_unlock();

    return DD_OK;
}

/*****************************************************************************
 * IDirectDrawClipper::GetClipList
 *
 * Retrieve a copy of the clip list
 *
 * Arguments:
 *  rect: Rectangle to be used to clip the clip list or NULL for the
 *      entire clip list.
 *  clip_list: structure for the resulting copy of the clip list.
 *      If NULL, fills Size up to the number of bytes necessary to hold
 *      the entire clip.
 *  clip_list_size: Size of resulting clip list; size of the buffer at clip_list
 *      or, if clip_list is NULL, receives the required size of the buffer
 *      in bytes.
 *
 * RETURNS
 *  Either DD_OK or DDERR_*
 ************************************************************************/
static HRESULT WINAPI ddraw_clipper_GetClipList(IDirectDrawClipper *iface, RECT *rect,
        RGNDATA *clip_list, DWORD *clip_list_size)
{
    struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
    static unsigned int once;

    TRACE("iface %p, rect %s, clip_list %p, clip_list_size %p.\n",
            iface, wine_dbgstr_rect(rect), clip_list, clip_list_size);

    wined3d_mutex_lock();

    if (clipper->window)
    {
        HDC dc = GetDCEx(clipper->window, NULL, DCX_WINDOW);
        if (dc)
        {
            HRGN rgn = CreateRectRgn(0, 0, 0, 0);
            if (GetRandomRgn(dc, rgn, SYSRGN))
            {
                if (GetVersion() & 0x80000000)
                {
                    POINT origin;
                    GetDCOrgEx(dc, &origin);
                    OffsetRgn(rgn, origin.x, origin.y);
                }
                if (rect)
                {
                    HRGN clip_rgn = CreateRectRgn(rect->left, rect->top,
                            rect->right, rect->bottom);
                    CombineRgn(rgn, rgn, clip_rgn, RGN_AND);
                    DeleteObject(clip_rgn);
                }
                *clip_list_size = GetRegionData(rgn, *clip_list_size, clip_list);
            }
            DeleteObject(rgn);
            ReleaseDC(clipper->window, dc);
        }

        wined3d_mutex_unlock();
        return DD_OK;
    }

    if (!once++)
        FIXME("clipper %p, rect %s, clip_list %p, clip_list_size %p stub!\n",
                clipper, wine_dbgstr_rect(rect), clip_list, clip_list_size);

    if (clip_list_size)
        *clip_list_size = 0;

    wined3d_mutex_unlock();
    return DDERR_NOCLIPLIST;
}

/*****************************************************************************
 * IDirectDrawClipper::SetClipList
 *
 * Sets or deletes (if region is NULL) the clip list
 *
 * This implementation is a stub and returns DD_OK always to make the app
 * happy.
 *
 * PARAMS
 *  region  Pointer to a LRGNDATA structure or NULL
 *  flags   not used, must be 0
 * RETURNS
 *  Either DD_OK or DDERR_*
 *****************************************************************************/
static HRESULT WINAPI ddraw_clipper_SetClipList(IDirectDrawClipper *iface, RGNDATA *region, DWORD flags)
{
    struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);

    FIXME("iface %p, region %p, flags %#x stub!\n", iface, region, flags);

    if (clipper->window)
        return DDERR_CLIPPERISUSINGHWND;

    return DD_OK;
}

static HRESULT WINAPI ddraw_clipper_GetHWnd(IDirectDrawClipper *iface, HWND *window)
{
    struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);

    TRACE("iface %p, window %p.\n", iface, window);

    wined3d_mutex_lock();
    *window = clipper->window;
    wined3d_mutex_unlock();

    return DD_OK;
}

static HRESULT WINAPI ddraw_clipper_Initialize(IDirectDrawClipper *iface,
        IDirectDraw *ddraw, DWORD flags)
{
    struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);

    TRACE("iface %p, ddraw %p, flags %#x.\n", iface, ddraw, flags);

    wined3d_mutex_lock();
    if (clipper->initialized)
    {
        wined3d_mutex_unlock();
        return DDERR_ALREADYINITIALIZED;
    }

    clipper->initialized = TRUE;
    wined3d_mutex_unlock();

    return DD_OK;
}

static HRESULT WINAPI ddraw_clipper_IsClipListChanged(IDirectDrawClipper *iface, BOOL *changed)
{
    FIXME("iface %p, changed %p stub!\n", iface, changed);

    /* XXX What is safest? */
    *changed = FALSE;

    return DD_OK;
}

static const struct IDirectDrawClipperVtbl ddraw_clipper_vtbl =
{
    ddraw_clipper_QueryInterface,
    ddraw_clipper_AddRef,
    ddraw_clipper_Release,
    ddraw_clipper_GetClipList,
    ddraw_clipper_GetHWnd,
    ddraw_clipper_Initialize,
    ddraw_clipper_IsClipListChanged,
    ddraw_clipper_SetClipList,
    ddraw_clipper_SetHWnd,
};

HRESULT ddraw_clipper_init(struct ddraw_clipper *clipper)
{
    clipper->IDirectDrawClipper_iface.lpVtbl = &ddraw_clipper_vtbl;
    clipper->ref = 1;

    return DD_OK;
}

struct ddraw_clipper *unsafe_impl_from_IDirectDrawClipper(IDirectDrawClipper *iface)
{
    if (!iface)
        return NULL;
    assert(iface->lpVtbl == &ddraw_clipper_vtbl);

    return impl_from_IDirectDrawClipper(iface);
}