J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2004 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #ifndef UshortGray_h_Included |
| 27 | #define UshortGray_h_Included |
| 28 | |
| 29 | #include "IntDcm.h" |
| 30 | |
| 31 | /* |
| 32 | * This file contains macro and type definitions used by the macros in |
| 33 | * LoopMacros.h to manipulate a surface of type "UshortGray". |
| 34 | */ |
| 35 | |
| 36 | typedef jushort UshortGrayPixelType; |
| 37 | typedef jushort UshortGrayDataType; |
| 38 | |
| 39 | #define UshortGrayPixelStride 2 |
| 40 | #define UshortGrayBitsPerPixel 16 |
| 41 | |
| 42 | #define DeclareUshortGrayLoadVars(PREFIX) |
| 43 | #define DeclareUshortGrayStoreVars(PREFIX) |
| 44 | #define SetUshortGrayStoreVarsYPos(PREFIX, pRasInfo, y) |
| 45 | #define SetUshortGrayStoreVarsXPos(PREFIX, pRasInfo, x) |
| 46 | #define InitUshortGrayLoadVars(PREFIX, pRasInfo) |
| 47 | #define InitUshortGrayStoreVarsY(PREFIX, pRasInfo) |
| 48 | #define InitUshortGrayStoreVarsX(PREFIX, pRasInfo) |
| 49 | #define NextUshortGrayStoreVarsX(PREFIX) |
| 50 | #define NextUshortGrayStoreVarsY(PREFIX) |
| 51 | #define DeclareUshortGrayPixelData(PREFIX) |
| 52 | #define ExtractUshortGrayPixelData(PIXEL, PREFIX) |
| 53 | |
| 54 | #define UshortGrayXparLutEntry -1 |
| 55 | #define UshortGrayIsXparLutEntry(pix) (pix < 0) |
| 56 | #define StoreUshortGrayNonXparFromArgb StoreUshortGrayFrom1IntArgb |
| 57 | |
| 58 | |
| 59 | /* |
| 60 | * Note: The following (original) equation was incorrect: |
| 61 | * gray = (((19595*r) + (38470*g) + (7471*b) + 32768) / 65536); |
| 62 | * |
| 63 | * The new component coefficients were derived from the following equation: |
| 64 | * k*rf*255 + k*gf*255 + k*bf*255 = 2^24 - 1 |
| 65 | * |
| 66 | * The new calculated coefficients are: |
| 67 | * rf = 19672 |
| 68 | * gf = 38620 |
| 69 | * bf = 7500 |
| 70 | * |
| 71 | * Thus the new equation would be: |
| 72 | * gray = (((19672*r) + (38620*g) + (7500*b) + 128) / 255) |
| 73 | * but it has been tweaked so the faster "divide by 256" can be performed and |
| 74 | * the "add 128" can be removed. Therefore, the resultant formula is optimal: |
| 75 | * gray = (((19672*r) + (38621*g) + (7500*b)) / 256) |
| 76 | */ |
| 77 | #define ComposeUshortGrayFrom3ByteRgb(r, g, b) \ |
| 78 | (UshortGrayPixelType)(((19672*(r)) + (38621*(g)) + (7500*(b))) / 256) |
| 79 | |
| 80 | #define UshortGrayPixelFromArgb(pixel, rgb, pRasInfo) \ |
| 81 | do { \ |
| 82 | int r, g, b; \ |
| 83 | ExtractIntDcmComponentsX123(rgb, r, g, b); \ |
| 84 | (pixel) = ComposeUshortGrayFrom3ByteRgb(r, g, b); \ |
| 85 | } while (0) |
| 86 | |
| 87 | #define StoreUshortGrayPixel(pRas, x, pixel) \ |
| 88 | ((pRas)[x] = (jushort) (pixel)) |
| 89 | |
| 90 | #define StoreUshortGrayPixelData(pPix, x, pixel, PREFIX) \ |
| 91 | StoreUshortGrayPixel(pPix, x, pixel) |
| 92 | |
| 93 | |
| 94 | #define LoadUshortGrayTo1IntRgb(pRas, PREFIX, x, rgb) \ |
| 95 | do { \ |
| 96 | int gray = (pRas)[x] >> 8; \ |
| 97 | (rgb) = (((gray << 8) | gray) << 8) | gray; \ |
| 98 | } while (0) |
| 99 | |
| 100 | #define LoadUshortGrayTo1IntArgb(pRas, PREFIX, x, argb) \ |
| 101 | do { \ |
| 102 | int gray = (pRas)[x] >> 8; \ |
| 103 | (argb) = (((((0xff << 8) | gray) << 8) | gray) << 8) | gray; \ |
| 104 | } while (0) |
| 105 | |
| 106 | #define LoadUshortGrayTo3ByteRgb(pRas, PREFIX, x, r, g, b) \ |
| 107 | ((r) = (g) = (b) = ((pRas)[x] >> 8)) |
| 108 | |
| 109 | #define LoadUshortGrayTo4ByteArgb(pRas, PREFIX, x, a, r, g, b) \ |
| 110 | do { \ |
| 111 | LoadUshortGrayTo3ByteRgb(pRas, PREFIX, x, r, g, b); \ |
| 112 | (a) = 0xff; \ |
| 113 | } while (0) |
| 114 | |
| 115 | #define LoadUshortGrayTo1ByteGray(pRas, PREFIX, x, gray) \ |
| 116 | (gray) = ((pRas)[x] >> 8) |
| 117 | |
| 118 | #define LoadUshortGrayTo1ShortGray(pRas, PREFIX, x, gray) \ |
| 119 | (gray) = (pRas)[x] |
| 120 | |
| 121 | #define StoreUshortGrayFrom1IntRgb(pRas, PREFIX, x, rgb) \ |
| 122 | do { \ |
| 123 | int r, g, b; \ |
| 124 | ExtractIntDcmComponentsX123(rgb, r, g, b); \ |
| 125 | StoreUshortGrayFrom3ByteRgb(pRas, PREFIX, x, r, g, b); \ |
| 126 | } while (0) |
| 127 | |
| 128 | #define StoreUshortGrayFrom1IntArgb(pRas, PREFIX, x, argb) \ |
| 129 | StoreUshortGrayFrom1IntRgb(pRas, PREFIX, x, argb) |
| 130 | |
| 131 | #define StoreUshortGrayFrom3ByteRgb(pRas, PREFIX, x, r, g, b) \ |
| 132 | (pRas)[x] = ComposeUshortGrayFrom3ByteRgb(r, g, b) |
| 133 | |
| 134 | #define StoreUshortGrayFrom4ByteArgb(pRas, PREFIX, x, a, r, g, b) \ |
| 135 | StoreUshortGrayFrom3ByteRgb(pRas, PREFIX, x, r, g, b) |
| 136 | |
| 137 | #define StoreUshortGrayFrom1ByteGray(pRas, PREFIX, x, gray) \ |
| 138 | (pRas)[x] = (jushort) (((gray) << 8) + (gray)) |
| 139 | |
| 140 | #define StoreUshortGrayFrom1ShortGray(pRas, PREFIX, x, gray) \ |
| 141 | StoreUshortGrayPixel(pRas, x, gray) |
| 142 | |
| 143 | |
| 144 | #define DeclareUshortGrayAlphaLoadData(PREFIX) |
| 145 | #define InitUshortGrayAlphaLoadData(PREFIX, pRasInfo) |
| 146 | |
| 147 | #define LoadAlphaFromUshortGrayFor1ShortGray(pRas, PREFIX, COMP_PREFIX) \ |
| 148 | COMP_PREFIX ## A = 0xffff |
| 149 | |
| 150 | #define Postload1ShortGrayFromUshortGray(pRas, PREFIX, COMP_PREFIX) \ |
| 151 | COMP_PREFIX ## G = (pRas)[0] |
| 152 | |
| 153 | |
| 154 | #define UshortGrayIsPremultiplied 0 |
| 155 | |
| 156 | #define DeclareUshortGrayBlendFillVars(PREFIX) \ |
| 157 | jushort PREFIX; |
| 158 | |
| 159 | #define ClearUshortGrayBlendFillVars(PREFIX, argb) \ |
| 160 | PREFIX = 0 |
| 161 | |
| 162 | #define InitUshortGrayBlendFillVarsNonPre(PREFIX, argb, COMP_PREFIX) \ |
| 163 | PREFIX = (jushort) COMP_PREFIX ## G |
| 164 | |
| 165 | #define InitUshortGrayBlendFillVarsPre(PREFIX, argb, COMP_PREFIX) |
| 166 | |
| 167 | #define StoreUshortGrayBlendFill(pRas, PREFIX, x, argb, COMP_PREFIX) \ |
| 168 | (pRas)[x] = PREFIX |
| 169 | |
| 170 | #define StoreUshortGrayFrom1ShortGrayComps(pRas, PREFIX, x, COMP_PREFIX) \ |
| 171 | StoreUshortGrayPixel(pRas, x, COMP_PREFIX ## G) |
| 172 | |
| 173 | #endif /* UshortGray_h_Included */ |