Constantin Kaplinsky | a2adc8d | 2006-05-25 05:01:55 +0000 | [diff] [blame^] | 1 | /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved. |
| 2 | * |
| 3 | * This is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This software is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this software; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 16 | * USA. |
| 17 | */ |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <rfb/PixelFormat.h> |
| 21 | #include <rfb/Exception.h> |
| 22 | #include <rfb/ConnParams.h> |
| 23 | #include <rfb/SMsgWriter.h> |
| 24 | #include <rfb/ColourMap.h> |
| 25 | #include <rfb/TrueColourMap.h> |
| 26 | #include <rfb/PixelBuffer.h> |
| 27 | #include <rfb/ColourCube.h> |
| 28 | #include <rfb/TransImageGetter.h> |
| 29 | |
| 30 | using namespace rfb; |
| 31 | |
| 32 | const PixelFormat bgr233PF(8, 8, false, true, 7, 7, 3, 0, 3, 6); |
| 33 | |
| 34 | static void noTransFn(void* table_, |
| 35 | const PixelFormat& inPF, void* inPtr, int inStride, |
| 36 | const PixelFormat& outPF, void* outPtr, int outStride, |
| 37 | int width, int height) |
| 38 | { |
| 39 | rdr::U8* ip = (rdr::U8*)inPtr; |
| 40 | rdr::U8* op = (rdr::U8*)outPtr; |
| 41 | int inStrideBytes = inStride * (inPF.bpp/8); |
| 42 | int outStrideBytes = outStride * (outPF.bpp/8); |
| 43 | int widthBytes = width * (outPF.bpp/8); |
| 44 | |
| 45 | while (height > 0) { |
| 46 | memcpy(op, ip, widthBytes); |
| 47 | ip += inStrideBytes; |
| 48 | op += outStrideBytes; |
| 49 | height--; |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | #define BPPOUT 8 |
| 54 | #include "transInitTempl.h" |
| 55 | #define BPPIN 8 |
| 56 | #include "transTempl.h" |
| 57 | #undef BPPIN |
| 58 | #define BPPIN 16 |
| 59 | #include "transTempl.h" |
| 60 | #undef BPPIN |
| 61 | #define BPPIN 32 |
| 62 | #include "transTempl.h" |
| 63 | #undef BPPIN |
| 64 | #undef BPPOUT |
| 65 | |
| 66 | #define BPPOUT 16 |
| 67 | #include "transInitTempl.h" |
| 68 | #define BPPIN 8 |
| 69 | #include "transTempl.h" |
| 70 | #undef BPPIN |
| 71 | #define BPPIN 16 |
| 72 | #include "transTempl.h" |
| 73 | #undef BPPIN |
| 74 | #define BPPIN 32 |
| 75 | #include "transTempl.h" |
| 76 | #undef BPPIN |
| 77 | #undef BPPOUT |
| 78 | |
| 79 | #define BPPOUT 32 |
| 80 | #include "transInitTempl.h" |
| 81 | #define BPPIN 8 |
| 82 | #include "transTempl.h" |
| 83 | #undef BPPIN |
| 84 | #define BPPIN 16 |
| 85 | #include "transTempl.h" |
| 86 | #undef BPPIN |
| 87 | #define BPPIN 32 |
| 88 | #include "transTempl.h" |
| 89 | #undef BPPIN |
| 90 | #undef BPPOUT |
| 91 | |
| 92 | |
| 93 | // Translation functions. Note that transSimple* is only used for 8/16bpp and |
| 94 | // transRGB* is used for 16/32bpp |
| 95 | |
| 96 | static transFnType transSimpleFns[][3] = { |
| 97 | { transSimple8to8, transSimple8to16, transSimple8to32 }, |
| 98 | { transSimple16to8, transSimple16to16, transSimple16to32 }, |
| 99 | }; |
| 100 | static transFnType transRGBFns[][3] = { |
| 101 | { transRGB16to8, transRGB16to16, transRGB16to32 }, |
| 102 | { transRGB32to8, transRGB32to16, transRGB32to32 } |
| 103 | }; |
| 104 | static transFnType transRGBCubeFns[][3] = { |
| 105 | { transRGBCube16to8, transRGBCube16to16, transRGBCube16to32 }, |
| 106 | { transRGBCube32to8, transRGBCube32to16, transRGBCube32to32 } |
| 107 | }; |
| 108 | |
| 109 | // Table initialisation functions. |
| 110 | |
| 111 | typedef void (*initCMtoTCFnType)(rdr::U8** tablep, const PixelFormat& inPF, |
| 112 | ColourMap* cm, const PixelFormat& outPF); |
| 113 | typedef void (*initTCtoTCFnType)(rdr::U8** tablep, const PixelFormat& inPF, |
| 114 | const PixelFormat& outPF); |
| 115 | typedef void (*initCMtoCubeFnType)(rdr::U8** tablep, const PixelFormat& inPF, |
| 116 | ColourMap* cm, ColourCube* cube); |
| 117 | typedef void (*initTCtoCubeFnType)(rdr::U8** tablep, const PixelFormat& inPF, |
| 118 | ColourCube* cube); |
| 119 | |
| 120 | |
| 121 | static initCMtoTCFnType initSimpleCMtoTCFns[] = { |
| 122 | initSimpleCMtoTC8, initSimpleCMtoTC16, initSimpleCMtoTC32 |
| 123 | }; |
| 124 | |
| 125 | static initTCtoTCFnType initSimpleTCtoTCFns[] = { |
| 126 | initSimpleTCtoTC8, initSimpleTCtoTC16, initSimpleTCtoTC32 |
| 127 | }; |
| 128 | |
| 129 | static initCMtoCubeFnType initSimpleCMtoCubeFns[] = { |
| 130 | initSimpleCMtoCube8, initSimpleCMtoCube16, initSimpleCMtoCube32 |
| 131 | }; |
| 132 | |
| 133 | static initTCtoCubeFnType initSimpleTCtoCubeFns[] = { |
| 134 | initSimpleTCtoCube8, initSimpleTCtoCube16, initSimpleTCtoCube32 |
| 135 | }; |
| 136 | |
| 137 | static initTCtoTCFnType initRGBTCtoTCFns[] = { |
| 138 | initRGBTCtoTC8, initRGBTCtoTC16, initRGBTCtoTC32 |
| 139 | }; |
| 140 | |
| 141 | static initTCtoCubeFnType initRGBTCtoCubeFns[] = { |
| 142 | initRGBTCtoCube8, initRGBTCtoCube16, initRGBTCtoCube32 |
| 143 | }; |
| 144 | |
| 145 | |
| 146 | TransImageGetter::TransImageGetter(bool econ) |
| 147 | : economic(econ), pb(0), table(0), transFn(0), cube(0) |
| 148 | { |
| 149 | } |
| 150 | |
| 151 | TransImageGetter::~TransImageGetter() |
| 152 | { |
| 153 | delete [] table; |
| 154 | } |
| 155 | |
| 156 | void TransImageGetter::init(PixelBuffer* pb_, const PixelFormat& out, |
| 157 | SMsgWriter* writer, ColourCube* cube_) |
| 158 | { |
| 159 | pb = pb_; |
| 160 | outPF = out; |
| 161 | transFn = 0; |
| 162 | cube = cube_; |
| 163 | const PixelFormat& inPF = pb->getPF(); |
| 164 | |
| 165 | if ((inPF.bpp != 8) && (inPF.bpp != 16) && (inPF.bpp != 32)) |
| 166 | throw Exception("TransImageGetter: bpp in not 8, 16 or 32"); |
| 167 | |
| 168 | if ((outPF.bpp != 8) && (outPF.bpp != 16) && (outPF.bpp != 32)) |
| 169 | throw Exception("TransImageGetter: bpp out not 8, 16 or 32"); |
| 170 | |
| 171 | if (!outPF.trueColour) { |
| 172 | if (outPF.bpp != 8) |
| 173 | throw Exception("TransImageGetter: outPF has color map but not 8bpp"); |
| 174 | |
| 175 | if (!inPF.trueColour) { |
| 176 | if (inPF.bpp != 8) |
| 177 | throw Exception("TransImageGetter: inPF has colorMap but not 8bpp"); |
| 178 | |
| 179 | // CM to CM/Cube |
| 180 | |
| 181 | if (cube) { |
| 182 | transFn = transSimpleFns[inPF.bpp/16][outPF.bpp/16]; |
| 183 | (*initSimpleCMtoCubeFns[outPF.bpp/16]) (&table, inPF, |
| 184 | pb->getColourMap(), cube); |
| 185 | } else { |
| 186 | transFn = noTransFn; |
| 187 | setColourMapEntries(0, 256, writer); |
| 188 | } |
| 189 | return; |
| 190 | } |
| 191 | |
| 192 | // TC to CM/Cube |
| 193 | |
| 194 | ColourCube defaultCube(6,6,6); |
| 195 | if (!cube) cube = &defaultCube; |
| 196 | |
| 197 | if ((inPF.bpp > 16) || (economic && (inPF.bpp == 16))) { |
| 198 | transFn = transRGBCubeFns[inPF.bpp/32][outPF.bpp/16]; |
| 199 | (*initRGBTCtoCubeFns[outPF.bpp/16]) (&table, inPF, cube); |
| 200 | } else { |
| 201 | transFn = transSimpleFns[inPF.bpp/16][outPF.bpp/16]; |
| 202 | (*initSimpleTCtoCubeFns[outPF.bpp/16]) (&table, inPF, cube); |
| 203 | } |
| 204 | |
| 205 | if (cube != &defaultCube) |
| 206 | return; |
| 207 | |
| 208 | if (writer) writer->writeSetColourMapEntries(0, 216, cube); |
| 209 | cube = 0; |
| 210 | return; |
| 211 | } |
| 212 | |
| 213 | if (inPF.equal(outPF)) { |
| 214 | transFn = noTransFn; |
| 215 | return; |
| 216 | } |
| 217 | |
| 218 | if (!inPF.trueColour) { |
| 219 | |
| 220 | // CM to TC |
| 221 | |
| 222 | if (inPF.bpp != 8) |
| 223 | throw Exception("TransImageGetter: inPF has colorMap but not 8bpp"); |
| 224 | transFn = transSimpleFns[inPF.bpp/16][outPF.bpp/16]; |
| 225 | (*initSimpleCMtoTCFns[outPF.bpp/16]) (&table, inPF, pb->getColourMap(), |
| 226 | outPF); |
| 227 | return; |
| 228 | } |
| 229 | |
| 230 | // TC to TC |
| 231 | |
| 232 | if ((inPF.bpp > 16) || (economic && (inPF.bpp == 16))) { |
| 233 | transFn = transRGBFns[inPF.bpp/32][outPF.bpp/16]; |
| 234 | (*initRGBTCtoTCFns[outPF.bpp/16]) (&table, inPF, outPF); |
| 235 | } else { |
| 236 | transFn = transSimpleFns[inPF.bpp/16][outPF.bpp/16]; |
| 237 | (*initSimpleTCtoTCFns[outPF.bpp/16]) (&table, inPF, outPF); |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | void TransImageGetter::setColourMapEntries(int firstCol, int nCols, |
| 242 | SMsgWriter* writer) |
| 243 | { |
| 244 | if (nCols == 0) |
| 245 | nCols = (1 << pb->getPF().depth) - firstCol; |
| 246 | if (pb->getPF().trueColour) return; // shouldn't be called in this case |
| 247 | |
| 248 | if (outPF.trueColour) { |
| 249 | (*initSimpleCMtoTCFns[outPF.bpp/16]) (&table, pb->getPF(), |
| 250 | pb->getColourMap(), outPF); |
| 251 | } else if (cube) { |
| 252 | (*initSimpleCMtoCubeFns[outPF.bpp/16]) (&table, pb->getPF(), |
| 253 | pb->getColourMap(), cube); |
| 254 | } else if (writer && pb->getColourMap()) { |
| 255 | writer->writeSetColourMapEntries(firstCol, nCols, pb->getColourMap()); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | void TransImageGetter::getImage(void* outPtr, const Rect& r, int outStride) |
| 260 | { |
| 261 | if (!transFn) |
| 262 | throw Exception("TransImageGetter: not initialised yet"); |
| 263 | |
| 264 | int inStride; |
| 265 | const rdr::U8* inPtr = pb->getPixelsR(r.translate(offset.negate()), &inStride); |
| 266 | |
| 267 | if (!outStride) outStride = r.width(); |
| 268 | |
| 269 | (*transFn)(table, pb->getPF(), (void*)inPtr, inStride, |
| 270 | outPF, outPtr, outStride, r.width(), r.height()); |
| 271 | } |
| 272 | |
| 273 | void TransImageGetter::translatePixels(void* inPtr, void* outPtr, |
| 274 | int nPixels) const |
| 275 | { |
| 276 | (*transFn)(table, pb->getPF(), inPtr, nPixels, |
| 277 | outPF, outPtr, nPixels, nPixels, 1); |
| 278 | } |