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/*
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* Copyright 2000-2008 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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#ifndef UshortGray_h_Included
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#define UshortGray_h_Included
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#include "IntDcm.h"
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/*
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* This file contains macro and type definitions used by the macros in
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* LoopMacros.h to manipulate a surface of type "UshortGray".
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*/
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typedef jushort UshortGrayPixelType;
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typedef jushort UshortGrayDataType;
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#define UshortGrayIsOpaque 1
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2
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#define UshortGrayPixelStride 2
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#define UshortGrayBitsPerPixel 16
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#define DeclareUshortGrayLoadVars(PREFIX)
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#define DeclareUshortGrayStoreVars(PREFIX)
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#define SetUshortGrayStoreVarsYPos(PREFIX, pRasInfo, y)
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#define SetUshortGrayStoreVarsXPos(PREFIX, pRasInfo, x)
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#define InitUshortGrayLoadVars(PREFIX, pRasInfo)
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#define InitUshortGrayStoreVarsY(PREFIX, pRasInfo)
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#define InitUshortGrayStoreVarsX(PREFIX, pRasInfo)
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#define NextUshortGrayStoreVarsX(PREFIX)
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#define NextUshortGrayStoreVarsY(PREFIX)
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#define DeclareUshortGrayPixelData(PREFIX)
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#define ExtractUshortGrayPixelData(PIXEL, PREFIX)
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#define UshortGrayXparLutEntry -1
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#define UshortGrayIsXparLutEntry(pix) (pix < 0)
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#define StoreUshortGrayNonXparFromArgb StoreUshortGrayFrom1IntArgb
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/*
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* Note: The following (original) equation was incorrect:
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* gray = (((19595*r) + (38470*g) + (7471*b) + 32768) / 65536);
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*
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* The new component coefficients were derived from the following equation:
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* k*rf*255 + k*gf*255 + k*bf*255 = 2^24 - 1
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*
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* The new calculated coefficients are:
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* rf = 19672
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* gf = 38620
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* bf = 7500
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*
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* Thus the new equation would be:
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* gray = (((19672*r) + (38620*g) + (7500*b) + 128) / 255)
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* but it has been tweaked so the faster "divide by 256" can be performed and
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* the "add 128" can be removed. Therefore, the resultant formula is optimal:
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* gray = (((19672*r) + (38621*g) + (7500*b)) / 256)
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*/
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#define ComposeUshortGrayFrom3ByteRgb(r, g, b) \
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(UshortGrayPixelType)(((19672*(r)) + (38621*(g)) + (7500*(b))) / 256)
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#define UshortGrayPixelFromArgb(pixel, rgb, pRasInfo) \
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do { \
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int r, g, b; \
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ExtractIntDcmComponentsX123(rgb, r, g, b); \
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(pixel) = ComposeUshortGrayFrom3ByteRgb(r, g, b); \
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} while (0)
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#define StoreUshortGrayPixel(pRas, x, pixel) \
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((pRas)[x] = (jushort) (pixel))
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#define StoreUshortGrayPixelData(pPix, x, pixel, PREFIX) \
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StoreUshortGrayPixel(pPix, x, pixel)
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#define LoadUshortGrayTo1IntRgb(pRas, PREFIX, x, rgb) \
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do { \
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int gray = (pRas)[x] >> 8; \
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(rgb) = (((gray << 8) | gray) << 8) | gray; \
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} while (0)
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#define LoadUshortGrayTo1IntArgb(pRas, PREFIX, x, argb) \
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do { \
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int gray = (pRas)[x] >> 8; \
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(argb) = (((((0xff << 8) | gray) << 8) | gray) << 8) | gray; \
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} while (0)
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#define LoadUshortGrayTo3ByteRgb(pRas, PREFIX, x, r, g, b) \
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((r) = (g) = (b) = ((pRas)[x] >> 8))
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#define LoadUshortGrayTo4ByteArgb(pRas, PREFIX, x, a, r, g, b) \
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do { \
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LoadUshortGrayTo3ByteRgb(pRas, PREFIX, x, r, g, b); \
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(a) = 0xff; \
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} while (0)
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#define LoadUshortGrayTo1ByteGray(pRas, PREFIX, x, gray) \
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(gray) = ((pRas)[x] >> 8)
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#define LoadUshortGrayTo1ShortGray(pRas, PREFIX, x, gray) \
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(gray) = (pRas)[x]
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#define StoreUshortGrayFrom1IntRgb(pRas, PREFIX, x, rgb) \
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do { \
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int r, g, b; \
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ExtractIntDcmComponentsX123(rgb, r, g, b); \
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StoreUshortGrayFrom3ByteRgb(pRas, PREFIX, x, r, g, b); \
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} while (0)
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#define StoreUshortGrayFrom1IntArgb(pRas, PREFIX, x, argb) \
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StoreUshortGrayFrom1IntRgb(pRas, PREFIX, x, argb)
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#define StoreUshortGrayFrom3ByteRgb(pRas, PREFIX, x, r, g, b) \
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(pRas)[x] = ComposeUshortGrayFrom3ByteRgb(r, g, b)
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#define StoreUshortGrayFrom4ByteArgb(pRas, PREFIX, x, a, r, g, b) \
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StoreUshortGrayFrom3ByteRgb(pRas, PREFIX, x, r, g, b)
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#define StoreUshortGrayFrom1ByteGray(pRas, PREFIX, x, gray) \
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(pRas)[x] = (jushort) (((gray) << 8) + (gray))
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#define StoreUshortGrayFrom1ShortGray(pRas, PREFIX, x, gray) \
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StoreUshortGrayPixel(pRas, x, gray)
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#define DeclareUshortGrayAlphaLoadData(PREFIX)
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#define InitUshortGrayAlphaLoadData(PREFIX, pRasInfo)
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#define LoadAlphaFromUshortGrayFor1ShortGray(pRas, PREFIX, COMP_PREFIX) \
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COMP_PREFIX ## A = 0xffff
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#define Postload1ShortGrayFromUshortGray(pRas, PREFIX, COMP_PREFIX) \
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COMP_PREFIX ## G = (pRas)[0]
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#define UshortGrayIsPremultiplied 0
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#define DeclareUshortGrayBlendFillVars(PREFIX) \
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jushort PREFIX;
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#define ClearUshortGrayBlendFillVars(PREFIX, argb) \
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PREFIX = 0
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#define InitUshortGrayBlendFillVarsNonPre(PREFIX, argb, COMP_PREFIX) \
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PREFIX = (jushort) COMP_PREFIX ## G
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#define InitUshortGrayBlendFillVarsPre(PREFIX, argb, COMP_PREFIX)
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#define StoreUshortGrayBlendFill(pRas, PREFIX, x, argb, COMP_PREFIX) \
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(pRas)[x] = PREFIX
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#define StoreUshortGrayFrom1ShortGrayComps(pRas, PREFIX, x, COMP_PREFIX) \
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StoreUshortGrayPixel(pRas, x, COMP_PREFIX ## G)
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#endif /* UshortGray_h_Included */
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