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Java example source code file (UshortGray.h)

This example Java source code file (UshortGray.h) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

comp_prefix, composeushortgrayfrom3bytergb, extractintdcmcomponentsx123, initushortgrayblendfillvarsnonpre, initushortgraystorevarsy, loadushortgrayto3bytergb, prefix, storeushortgrayfrom1intargb, storeushortgrayfrom1intrgb, storeushortgrayfrom3bytergb, storeushortgraypixel, ushortgray_h_included, ushortgraydatatype, ushortgraypixeltype

The UshortGray.h Java example source code

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

#ifndef UshortGray_h_Included
#define UshortGray_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 "UshortGray".
 */

typedef jushort UshortGrayPixelType;
typedef jushort UshortGrayDataType;

#define UshortGrayIsOpaque 1

#define UshortGrayPixelStride           2
#define UshortGrayBitsPerPixel         16

#define DeclareUshortGrayLoadVars(PREFIX)
#define DeclareUshortGrayStoreVars(PREFIX)
#define SetUshortGrayStoreVarsYPos(PREFIX, pRasInfo, y)
#define SetUshortGrayStoreVarsXPos(PREFIX, pRasInfo, x)
#define InitUshortGrayLoadVars(PREFIX, pRasInfo)
#define InitUshortGrayStoreVarsY(PREFIX, pRasInfo)
#define InitUshortGrayStoreVarsX(PREFIX, pRasInfo)
#define NextUshortGrayStoreVarsX(PREFIX)
#define NextUshortGrayStoreVarsY(PREFIX)
#define DeclareUshortGrayPixelData(PREFIX)
#define ExtractUshortGrayPixelData(PIXEL, PREFIX)

#define UshortGrayXparLutEntry                  -1
#define UshortGrayIsXparLutEntry(pix)           (pix < 0)
#define StoreUshortGrayNonXparFromArgb          StoreUshortGrayFrom1IntArgb


/*
 * Note: The following (original) equation was incorrect:
 *   gray = (((19595*r) + (38470*g) + (7471*b) + 32768) / 65536);
 *
 * The new component coefficients were derived from the following equation:
 *   k*rf*255 + k*gf*255 + k*bf*255 = 2^24 - 1
 *
 * The new calculated coefficients are:
 *   rf = 19672
 *   gf = 38620
 *   bf = 7500
 *
 * Thus the new equation would be:
 *   gray = (((19672*r) + (38620*g) + (7500*b) + 128) / 255)
 * but it has been tweaked so the faster "divide by 256" can be performed and
 * the "add 128" can be removed.  Therefore, the resultant formula is optimal:
 *   gray = (((19672*r) + (38621*g) + (7500*b)) / 256)
 */
#define ComposeUshortGrayFrom3ByteRgb(r, g, b) \
    (UshortGrayPixelType)(((19672*(r)) + (38621*(g)) + (7500*(b))) / 256)

#define UshortGrayPixelFromArgb(pixel, rgb, pRasInfo) \
    do { \
        int r, g, b; \
        ExtractIntDcmComponentsX123(rgb, r, g, b); \
        (pixel) = ComposeUshortGrayFrom3ByteRgb(r, g, b); \
    } while (0)

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

#define StoreUshortGrayPixelData(pPix, x, pixel, PREFIX) \
    StoreUshortGrayPixel(pPix, x, pixel)


#define LoadUshortGrayTo1IntRgb(pRas, PREFIX, x, rgb) \
    do { \
        int gray = (pRas)[x] >> 8; \
        (rgb) = (((gray << 8) | gray) << 8) | gray; \
    } while (0)

#define LoadUshortGrayTo1IntArgb(pRas, PREFIX, x, argb) \
    do { \
        int gray = (pRas)[x] >> 8; \
        (argb) = (((((0xff << 8) | gray) << 8) | gray) << 8) | gray; \
    } while (0)

#define LoadUshortGrayTo3ByteRgb(pRas, PREFIX, x, r, g, b) \
    ((r) = (g) = (b) = ((pRas)[x] >> 8))

#define LoadUshortGrayTo4ByteArgb(pRas, PREFIX, x, a, r, g, b) \
    do { \
        LoadUshortGrayTo3ByteRgb(pRas, PREFIX, x, r, g, b); \
        (a) = 0xff; \
    } while (0)

#define LoadUshortGrayTo1ByteGray(pRas, PREFIX, x, gray) \
    (gray) = ((pRas)[x] >> 8)

#define LoadUshortGrayTo1ShortGray(pRas, PREFIX, x, gray) \
    (gray) = (pRas)[x]

#define StoreUshortGrayFrom1IntRgb(pRas, PREFIX, x, rgb) \
    do { \
        int r, g, b; \
        ExtractIntDcmComponentsX123(rgb, r, g, b); \
        StoreUshortGrayFrom3ByteRgb(pRas, PREFIX, x, r, g, b); \
    } while (0)

#define StoreUshortGrayFrom1IntArgb(pRas, PREFIX, x, argb) \
    StoreUshortGrayFrom1IntRgb(pRas, PREFIX, x, argb)

#define StoreUshortGrayFrom3ByteRgb(pRas, PREFIX, x, r, g, b) \
    (pRas)[x] = ComposeUshortGrayFrom3ByteRgb(r, g, b)

#define StoreUshortGrayFrom4ByteArgb(pRas, PREFIX, x, a, r, g, b) \
    StoreUshortGrayFrom3ByteRgb(pRas, PREFIX, x, r, g, b)

#define StoreUshortGrayFrom1ByteGray(pRas, PREFIX, x, gray) \
    (pRas)[x] = (jushort) (((gray) << 8) + (gray))

#define StoreUshortGrayFrom1ShortGray(pRas, PREFIX, x, gray) \
    StoreUshortGrayPixel(pRas, x, gray)


#define DeclareUshortGrayAlphaLoadData(PREFIX)
#define InitUshortGrayAlphaLoadData(PREFIX, pRasInfo)

#define LoadAlphaFromUshortGrayFor1ShortGray(pRas, PREFIX, COMP_PREFIX) \
    COMP_PREFIX ## A = 0xffff

#define Postload1ShortGrayFromUshortGray(pRas, PREFIX, COMP_PREFIX) \
    COMP_PREFIX ## G = (pRas)[0]


#define UshortGrayIsPremultiplied       0

#define DeclareUshortGrayBlendFillVars(PREFIX) \
    jushort PREFIX;

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

#define InitUshortGrayBlendFillVarsNonPre(PREFIX, argb, COMP_PREFIX) \
    PREFIX = (jushort) COMP_PREFIX ## G

#define InitUshortGrayBlendFillVarsPre(PREFIX, argb, COMP_PREFIX)

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

#define StoreUshortGrayFrom1ShortGrayComps(pRas, PREFIX, x, COMP_PREFIX) \
    StoreUshortGrayPixel(pRas, x, COMP_PREFIX ## G)

#endif /* UshortGray_h_Included */

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