/*
 *Copyright (C) 2001-2004 Harold L Hunt II All Rights Reserved.
 *
 *Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 *"Software"), to deal in the Software without restriction, including
 *without limitation the rights to use, copy, modify, merge, publish,
 *distribute, sublicense, and/or sell copies of the Software, and to
 *permit persons to whom the Software is furnished to do so, subject to
 *the following conditions:
 *
 *The above copyright notice and this permission notice shall be
 *included in all copies or substantial portions of the Software.
 *
 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *Except as contained in this notice, the name of Harold L Hunt II
 *shall not be used in advertising or otherwise to promote the sale, use
 *or other dealings in this Software without prior written authorization
 *from Harold L Hunt II.
 *
 * Authors:	Harold L Hunt II
 */

#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include "win.h"

/*
 * Local prototypes
 */

static void

winValidateGCNativeGDI(GCPtr pGC, unsigned long changes, DrawablePtr pDrawable);

static void
 winDestroyGCNativeGDI(GCPtr pGC);

const GCFuncs winGCFuncs = {
    winValidateGCNativeGDI,
    miChangeGC,
    miCopyGC,
    winDestroyGCNativeGDI,
    miChangeClip,
    miDestroyClip,
    miCopyClip,
};

/* Drawing Primitives */
const GCOps winGCOps = {
    winFillSpansNativeGDI,
    winSetSpansNativeGDI,
    miPutImage,
    miCopyArea,
    miCopyPlane,
    miPolyPoint,
    winPolyLineNativeGDI,
    miPolySegment,
    miPolyRectangle,
    miPolyArc,
    miFillPolygon,
    miPolyFillRect,
    miPolyFillArc,
    miPolyText8,
    miPolyText16,
    miImageText8,
    miImageText16,
    miImageGlyphBlt,
    miPolyGlyphBlt,
    miPushPixels,
};

/* See Porting Layer Definition - p. 45 */
/* See mfb/mfbgc.c - mfbCreateGC() */
/* See Strategies for Porting - pp. 15, 16 */
Bool
winCreateGCNativeGDI(GCPtr pGC)
{
    winPrivGCPtr pGCPriv = NULL;
    winPrivScreenPtr pScreenPriv = NULL;

  winDebug ("winCreateGCNativeGDI - depth: %d\n", pGC->depth);

    pGC->ops = (GCOps *) &winGCOps;
    pGC->funcs = (GCFuncs *) &winGCFuncs;

    /* We want all coordinates passed to spans functions to be screen relative */
    pGC->miTranslate = TRUE;

    /* Allocate privates for this GC */
    pGCPriv = winGetGCPriv(pGC);
    if (pGCPriv == NULL) {
        ErrorF("winCreateGCNativeGDI () - Privates pointer was NULL\n");
        return FALSE;
    }

    /* Create a new screen DC for the display window */
    pScreenPriv = winGetScreenPriv(pGC->pScreen);
    pGCPriv->hdc = GetDC(pScreenPriv->hwndScreen);

    /* Allocate a memory DC for the GC */
    pGCPriv->hdcMem = CreateCompatibleDC(pGCPriv->hdc);

    return TRUE;
}

static void
winValidateGCNativeGDI(GCPtr pGC,
                       unsigned long ulChanges, DrawablePtr pDrawable)
{
    if ((ulChanges &
         (GCClipXOrigin | GCClipYOrigin | GCClipMask | GCSubwindowMode))
        || (pDrawable->serialNumber !=
            (pGC->serialNumber & DRAWABLE_SERIAL_BITS))) {
        miComputeCompositeClip(pGC, pDrawable);
    }
}

/* See Porting Layer Definition - p. 46 */
static void
winDestroyGCNativeGDI(GCPtr pGC)
{
    winGCPriv(pGC);
    winScreenPriv(pGC->pScreen);

    if (pGC->freeCompClip)
        RegionDestroy(pGC->pCompositeClip);

    /* Free the memory DC */
    if (pGCPriv->hdcMem != NULL) {
        DeleteDC(pGCPriv->hdcMem);
        pGCPriv->hdcMem = NULL;
    }

    /* Release the screen DC for the display window */
    if (pGCPriv->hdc != NULL) {
        ReleaseDC(pScreenPriv->hwndScreen, pGCPriv->hdc);
        pGCPriv->hdc = NULL;
    }

    /* Invalidate the GC privates pointer */
    winSetGCPriv(pGC, NULL);
}