src/java.desktop/share/native/libawt/java2d/loops/IntArgbPre.h

/*
 * Copyright (c) 2000, 2016, 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.
 */

#ifndef IntArgbPre_h_Included
#define IntArgbPre_h_Included

#include "IntDcm.h"

/*
 * This file contains macro and type definitions used by the macros in
 * LoopMacros.h to manipulate a surface of type "IntArgbPre".
 */

typedef jint    IntArgbPrePixelType;
typedef jint    IntArgbPreDataType;

#define IntArgbPreIsOpaque 0

#define IntArgbPrePixelStride   4

#define DeclareIntArgbPreLoadVars(PREFIX)
#define DeclareIntArgbPreStoreVars(PREFIX)
#define InitIntArgbPreLoadVars(PREFIX, pRasInfo)
#define SetIntArgbPreStoreVarsYPos(PREFIX, pRasInfo, y)
#define SetIntArgbPreStoreVarsXPos(PREFIX, pRasInfo, x)
#define InitIntArgbPreStoreVarsY(PREFIX, pRasInfo)
#define InitIntArgbPreStoreVarsX(PREFIX, pRasInfo)
#define NextIntArgbPreStoreVarsX(PREFIX)
#define NextIntArgbPreStoreVarsY(PREFIX)


#define IntArgbPrePixelFromArgb(pixel, rgb, pRasInfo) \
    do { \
        if ((((rgb) >> 24) + 1) == 0) { \
            (pixel) = (rgb); \
        } else { \
            jint a, r, g, b; \
            ExtractIntDcmComponents1234(rgb, a, r, g, b); \
            r = MUL8(a, r); \
            g = MUL8(a, g); \
            b = MUL8(a, b); \
            (pixel) = ComposeIntDcmComponents1234(a, r, g, b); \
        } \
    } while (0)

#define StoreIntArgbPrePixel(pRas, x, pixel) \
    (pRas)[x] = (pixel)

#define DeclareIntArgbPrePixelData(PREFIX)

#define ExtractIntArgbPrePixelData(PIXEL, PREFIX)

#define StoreIntArgbPrePixelData(pPix, x, pixel, PREFIX) \
    (pPix)[x] = (pixel)


/*
 * REMIND: we delegate to the ...To1IntArgb macro here, although it does
 *         slightly more work (may pack the alpha value into the RGB result)
 */
#define LoadIntArgbPreTo1IntRgb(pRas, PREFIX, x, rgb) \
    LoadIntArgbPreTo1IntArgb(pRas, PREFIX, x, rgb)

#define LoadIntArgbPreTo1IntArgb(pRas, PREFIX, x, argb) \
    do { \
        jint pixel = (pRas)[x]; \
        jint a = ((juint) pixel) >> 24; \
        if ((a == 0xff) || (a == 0)) { \
            (argb) = pixel; \
        } else { \
            jint r, g, b; \
            ExtractIntDcmComponentsX123(pixel, r, g, b); \
            r = DIV8(r, a); \
            g = DIV8(g, a); \
            b = DIV8(b, a); \
            (argb) = ComposeIntDcmComponents1234(a, r, g, b); \
        } \
    } while (0)

#define LoadIntArgbPreTo3ByteRgb(pRas, PREFIX, x, r, g, b) \
    do { \
        jint a; \
        LoadIntArgbPreTo4ByteArgb(pRas, PREFIX, x, a, r, g, b); \
    } while (0)

#define LoadIntArgbPreTo4ByteArgb(pRas, PREFIX, x, a, r, g, b) \
    do { \
        jint pixel = (pRas)[x]; \
        ExtractIntDcmComponents1234(pixel, a, r, g, b); \
        if (((a) != 0xff) && ((a) != 0)) { \
            (r) = DIV8(r, a); \
            (g) = DIV8(g, a); \
            (b) = DIV8(b, a); \
        } \
    } while (0)

#define StoreIntArgbPreFrom1IntRgb(pRas, PREFIX, x, rgb) \
    (pRas)[x] = 0xff000000 | (rgb)

#define StoreIntArgbPreFrom1IntArgb(pRas, PREFIX, x, argb) \
    do { \
        if ((((argb) >> 24) + 1) == 0) { \
            (pRas)[x] = (argb); \
        } else { \
            jint a, r, g, b; \
            ExtractIntDcmComponents1234(argb, a, r, g, b); \
            r = MUL8(a, r); \
            g = MUL8(a, g); \
            b = MUL8(a, b); \
            (pRas)[x] = ComposeIntDcmComponents1234(a, r, g, b); \
        } \
    } while (0)

#define StoreIntArgbPreFrom3ByteRgb(pRas, PREFIX, x, r, g, b) \
    (pRas)[x] = ComposeIntDcmComponents1234(0xff, r, g, b)

#define StoreIntArgbPreFrom4ByteArgb(pRas, PREFIX, x, a, r, g, b) \
    do { \
        if ((a) != 0xff) { \
            (r) = MUL8(a, r); \
            (g) = MUL8(a, g); \
            (b) = MUL8(a, b); \
        } \
        (pRas)[x] = ComposeIntDcmComponents1234(a, r, g, b); \
    } while (0)

#define CopyIntArgbPreToIntArgbPre(pRGB, i, PREFIX, pRow, x) \
    (pRGB)[i] = (pRow)[x]


#define DeclareIntArgbPreAlphaLoadData(PREFIX) \
    jint PREFIX;

#define InitIntArgbPreAlphaLoadData(PREFIX, pRasInfo) \
    PREFIX = 0

#define LoadAlphaFromIntArgbPreFor4ByteArgb(pRas, PREFIX, COMP_PREFIX) \
    do { \
        PREFIX = (pRas)[0]; \
        COMP_PREFIX ## A = ((juint) PREFIX) >> 24; \
    } while (0)

#define LoadAlphaFromIntArgbPreFor1ByteGray(pRas, PREFIX, COMP_PREFIX) \
    LoadAlphaFromIntArgbPreFor4ByteArgb(pRas, PREFIX, COMP_PREFIX)

#define LoadAlphaFromIntArgbPreFor1ShortGray(pRas, PREFIX, COMP_PREFIX) \
    do { \
        LoadAlphaFromIntArgbFor4ByteArgb(pRas, PREFIX, COMP_PREFIX); \
        COMP_PREFIX ## A = (COMP_PREFIX ## A << 8) + COMP_PREFIX ## A; \
    } while (0)

#define Postload4ByteArgbFromIntArgbPre(pRas, PREFIX, COMP_PREFIX) \
    do { \
        ExtractIntDcmComponentsX123(PREFIX, COMP_PREFIX ## R, \
                                    COMP_PREFIX ## G, COMP_PREFIX ## B); \
    } while (0)

#define Postload1ByteGrayFromIntArgbPre(pRas, PREFIX, COMP_PREFIX) \
    do { \
        int r, g, b; \
        ExtractIntDcmComponentsX123(PREFIX, r, g, b); \
        COMP_PREFIX ## G = ComposeByteGrayFrom3ByteRgb(r, g, b); \
    } while (0)

#define Postload1ShortGrayFromIntArgbPre(pRas, PREFIX, COMP_PREFIX) \
    do { \
        int r, g, b; \
        ExtractIntDcmComponentsX123(PREFIX, r, g, b); \
        COMP_PREFIX ## G = ComposeUshortGrayFrom3ByteRgb(r, g, b); \
    } while (0)


#define IntArgbPreIsPremultiplied       1

#define DeclareIntArgbPreBlendFillVars(PREFIX)

#define ClearIntArgbPreBlendFillVars(PREFIX, argb) \
    argb = 0

#define InitIntArgbPreBlendFillVarsNonPre(PREFIX, argb, COMP_PREFIX)

#define InitIntArgbPreBlendFillVarsPre(PREFIX, argb, COMP_PREFIX) \
    argb = ComposeIntDcmComponents1234(COMP_PREFIX ## A, \
                                       COMP_PREFIX ## R, \
                                       COMP_PREFIX ## G, \
                                       COMP_PREFIX ## B)

#define StoreIntArgbPreBlendFill(pRas, PREFIX, x, argb, COMP_PREFIX) \
    (pRas)[x] = (argb)

#define StoreIntArgbPreFrom4ByteArgbComps(pRas, PREFIX, x, COMP_PREFIX) \
    (pRas)[x] = ComposeIntDcmComponents1234(COMP_PREFIX ## A, \
                                            COMP_PREFIX ## R, \
                                            COMP_PREFIX ## G, \
                                            COMP_PREFIX ## B)

/*
 * SrcOver ## TYPE ## BlendFactor
 * Returns appropriate blend value for use in blending calculations.
 */
#define SrcOverIntArgbPreBlendFactor(dF, dA) \
    (dF)

#endif /* IntArgbPre_h_Included */