src/windows/native/sun/java2d/d3d/D3DMaskBlit.cpp

/*
 * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

#include <stdlib.h>
#include <jlong.h>

#include "D3DMaskBlit.h"
#include "D3DRenderQueue.h"
#include "D3DSurfaceData.h"

/**
 * REMIND: This method assumes that the dimensions of the incoming pixel
 *         array are less than or equal to the cached blit texture tile;
 *         these are rather fragile assumptions, and should be cleaned up...
 */
HRESULT
D3DMaskBlit_MaskBlit(JNIEnv *env, D3DContext *d3dc,
                     jint dstx, jint dsty,
                     jint width, jint height,
                     void *pPixels)
{
    HRESULT res = S_OK;
    jfloat dx1, dy1, dx2, dy2;
    jfloat tx1, ty1, tx2, ty2;

    J2dTraceLn(J2D_TRACE_INFO, "D3DMaskBlit_MaskBlit");

    if (width <= 0 || height <= 0) {
        J2dTraceLn(J2D_TRACE_WARNING,
                   "D3DMaskBlit_MaskBlit: invalid dimensions");
        return res;
    }

    RETURN_STATUS_IF_NULL(pPixels, E_FAIL);
    RETURN_STATUS_IF_NULL(d3dc, E_FAIL);
    if (FAILED(res = d3dc->BeginScene(STATE_TEXTUREOP))) {
        return res;
    }

    D3DResource *pBlitTexRes;
    if (FAILED(res =
               d3dc->GetResourceManager()->GetBlitTexture(&pBlitTexRes)))
    {
        return res;
    }
    IDirect3DTexture9 *pBlitTex = pBlitTexRes->GetTexture();

    if (FAILED(res = d3dc->SetTexture(pBlitTex, 0))) {
        return res;
    }

    IDirect3DDevice9 *pd3dDevice = d3dc->Get3DDevice();
    D3DTEXTUREFILTERTYPE fhint =
        d3dc->IsTextureFilteringSupported(D3DTEXF_NONE) ?
            D3DTEXF_NONE : D3DTEXF_POINT;
    pd3dDevice->SetSamplerState(0, D3DSAMP_MAGFILTER, fhint);
    pd3dDevice->SetSamplerState(0, D3DSAMP_MINFILTER, fhint);

    // copy system memory IntArgbPre surface into cached texture
    if (FAILED(res = d3dc->UploadTileToTexture(pBlitTexRes, pPixels,
                                               0, 0, 0, 0,
                                               width, height,
                                               width*4,
                                               TILEFMT_4BYTE_ARGB_PRE)))
    {
        return res;
    }

    dx1 = (jfloat)dstx;
    dy1 = (jfloat)dsty;
    dx2 = dx1 + width;
    dy2 = dy1 + height;

    tx1 = 0.0f;
    ty1 = 0.0f;
    tx2 = ((jfloat)width) / D3DC_BLIT_TILE_SIZE;
    ty2 = ((jfloat)height) / D3DC_BLIT_TILE_SIZE;

    // render cached texture to the destination surface
    res = d3dc->pVCacher->DrawTexture(dx1, dy1, dx2, dy2,
                                      tx1, ty1, tx2, ty2);
    res = d3dc->pVCacher->Render();

    return res;
}