/*
* 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
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*/
#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]
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