xpdf-4.04.tar.gz: xpdf-4.04/xpdf/PreScanOutputDev.cc

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Member "xpdf-4.04/xpdf/PreScanOutputDev.cc" (18 Apr 2022, 8588 Bytes) of package /linux/misc/xpdf-4.04.tar.gz:

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1 //======================================================================== 2 // 3 // PreScanOutputDev.cc 4 // 5 // Copyright 2005 Glyph & Cog, LLC 6 // 7 //======================================================================== 8 9 #include <aconf.h> 10 11 #ifdef USE_GCC_PRAGMAS 12 #pragma implementation 13 #endif 14 15 #include <math.h> 16 #include "gmempp.h" 17 #include "GlobalParams.h" 18 #include "Page.h" 19 #include "Gfx.h" 20 #include "GfxFont.h" 21 #include "Link.h" 22 #include "PreScanOutputDev.h" 23 24 //------------------------------------------------------------------------ 25 // PreScanOutputDev 26 //------------------------------------------------------------------------ 27 28 PreScanOutputDev::PreScanOutputDev() { 29 clearStats(); 30 } 31 32 PreScanOutputDev::~PreScanOutputDev() { 33 } 34 35 void PreScanOutputDev::startPage(int pageNum, GfxState *state) { 36 } 37 38 void PreScanOutputDev::endPage() { 39 } 40 41 void PreScanOutputDev::stroke(GfxState *state) { 42 double *dash; 43 int dashLen; 44 double dashStart; 45 46 check(state, state->getStrokeColorSpace(), state->getStrokeColor(), 47 state->getStrokeOpacity(), state->getBlendMode()); 48 state->getLineDash(&dash, &dashLen, &dashStart); 49 if (dashLen != 0) { 50 gdi = gFalse; 51 } 52 } 53 54 void PreScanOutputDev::fill(GfxState *state) { 55 check(state, state->getFillColorSpace(), state->getFillColor(), 56 state->getFillOpacity(), state->getBlendMode()); 57 } 58 59 void PreScanOutputDev::eoFill(GfxState *state) { 60 check(state, state->getFillColorSpace(), state->getFillColor(), 61 state->getFillOpacity(), state->getBlendMode()); 62 } 63 64 void PreScanOutputDev::tilingPatternFill(GfxState *state, Gfx *gfx, 65 Object *strRef, 66 int paintType, int tilingType, 67 Dict *resDict, 68 double *mat, double *bbox, 69 int x0, int y0, int x1, int y1, 70 double xStep, double yStep) { 71 if (paintType == 1) { 72 gfx->drawForm(strRef, resDict, mat, bbox); 73 } else { 74 check(state, state->getFillColorSpace(), state->getFillColor(), 75 state->getFillOpacity(), state->getBlendMode()); 76 } 77 } 78 79 GBool PreScanOutputDev::shadedFill(GfxState *state, GfxShading *shading) { 80 if (shading->getColorSpace()->getMode() != csDeviceGray && 81 shading->getColorSpace()->getMode() != csCalGray) { 82 gray = gFalse; 83 } 84 mono = gFalse; 85 if (state->getFillOpacity() != 1 || 86 state->getBlendMode() != gfxBlendNormal) { 87 transparency = gTrue; 88 } 89 return gTrue; 90 } 91 92 void PreScanOutputDev::clip(GfxState *state) { 93 //~ check for a rectangle "near" the edge of the page; 94 //~ else set gdi to false 95 } 96 97 void PreScanOutputDev::eoClip(GfxState *state) { 98 //~ see clip() 99 } 100 101 void PreScanOutputDev::beginStringOp(GfxState *state) { 102 int render; 103 GfxFont *font; 104 double m11, m12, m21, m22; 105 GBool simpleTTF; 106 107 render = state->getRender(); 108 if (!(render & 1)) { 109 check(state, state->getFillColorSpace(), state->getFillColor(), 110 state->getFillOpacity(), state->getBlendMode()); 111 } 112 if ((render & 3) == 1 || (render & 3) == 2) { 113 check(state, state->getStrokeColorSpace(), state->getStrokeColor(), 114 state->getStrokeOpacity(), state->getBlendMode()); 115 } 116 117 font = state->getFont(); 118 state->getFontTransMat(&m11, &m12, &m21, &m22); 119 //~ this should check for external fonts that are non-TrueType 120 simpleTTF = fabs(m11 + m22) < 0.01 && 121 m11 > 0 && 122 fabs(m12) < 0.01 && 123 fabs(m21) < 0.01 && 124 fabs(state->getHorizScaling() - 1) < 0.001 && 125 (font->getType() == fontTrueType || 126 font->getType() == fontTrueTypeOT); 127 if (simpleTTF) { 128 //~ need to create a FoFiTrueType object, and check for a Unicode cmap 129 } 130 if (state->getRender() != 0 || !simpleTTF) { 131 gdi = gFalse; 132 } 133 } 134 135 void PreScanOutputDev::endStringOp(GfxState *state) { 136 } 137 138 GBool PreScanOutputDev::beginType3Char(GfxState *state, double x, double y, 139 double dx, double dy, 140 CharCode code, Unicode *u, int uLen) { 141 // return false so all Type 3 chars get rendered (no caching) 142 return gFalse; 143 } 144 145 void PreScanOutputDev::endType3Char(GfxState *state) { 146 } 147 148 void PreScanOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str, 149 int width, int height, GBool invert, 150 GBool inlineImg, GBool interpolate) { 151 check(state, state->getFillColorSpace(), state->getFillColor(), 152 state->getFillOpacity(), state->getBlendMode()); 153 if (state->getFillColorSpace()->getMode() == csPattern) { 154 patternImgMask = gTrue; 155 } 156 gdi = gFalse; 157 158 if (inlineImg) { 159 str->reset(); 160 str->discardChars(height * ((width + 7) / 8)); 161 str->close(); 162 } 163 } 164 165 void PreScanOutputDev::drawImage(GfxState *state, Object *ref, Stream *str, 166 int width, int height, 167 GfxImageColorMap *colorMap, 168 int *maskColors, GBool inlineImg, 169 GBool interpolate) { 170 GfxColorSpace *colorSpace; 171 172 colorSpace = colorMap->getColorSpace(); 173 if (colorSpace->getMode() == csIndexed) { 174 colorSpace = ((GfxIndexedColorSpace *)colorSpace)->getBase(); 175 } 176 if (colorSpace->getMode() == csDeviceGray || 177 colorSpace->getMode() == csCalGray) { 178 if (colorMap->getBits() > 1) { 179 mono = gFalse; 180 } 181 } else { 182 gray = gFalse; 183 mono = gFalse; 184 } 185 if (state->getFillOpacity() != 1 || 186 state->getBlendMode() != gfxBlendNormal) { 187 transparency = gTrue; 188 } 189 gdi = gFalse; 190 191 if (inlineImg) { 192 str->reset(); 193 str->discardChars(height * ((width * colorMap->getNumPixelComps() * 194 colorMap->getBits() + 7) / 8)); 195 str->close(); 196 } 197 } 198 199 void PreScanOutputDev::drawMaskedImage(GfxState *state, Object *ref, 200 Stream *str, 201 int width, int height, 202 GfxImageColorMap *colorMap, 203 Object *maskRef, Stream *maskStr, 204 int maskWidth, int maskHeight, 205 GBool maskInvert, GBool interpolate) { 206 GfxColorSpace *colorSpace; 207 208 colorSpace = colorMap->getColorSpace(); 209 if (colorSpace->getMode() == csIndexed) { 210 colorSpace = ((GfxIndexedColorSpace *)colorSpace)->getBase(); 211 } 212 if (colorSpace->getMode() == csDeviceGray || 213 colorSpace->getMode() == csCalGray) { 214 if (colorMap->getBits() > 1) { 215 mono = gFalse; 216 } 217 } else { 218 gray = gFalse; 219 mono = gFalse; 220 } 221 if (state->getFillOpacity() != 1 || 222 state->getBlendMode() != gfxBlendNormal) { 223 transparency = gTrue; 224 } 225 gdi = gFalse; 226 } 227 228 void PreScanOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, 229 Stream *str, 230 int width, int height, 231 GfxImageColorMap *colorMap, 232 Object *maskRef, Stream *maskStr, 233 int maskWidth, int maskHeight, 234 GfxImageColorMap *maskColorMap, 235 double *matte, GBool interpolate) { 236 GfxColorSpace *colorSpace; 237 238 colorSpace = colorMap->getColorSpace(); 239 if (colorSpace->getMode() == csIndexed) { 240 colorSpace = ((GfxIndexedColorSpace *)colorSpace)->getBase(); 241 } 242 if (colorSpace->getMode() != csDeviceGray && 243 colorSpace->getMode() != csCalGray) { 244 gray = gFalse; 245 } 246 mono = gFalse; 247 transparency = gTrue; 248 gdi = gFalse; 249 } 250 251 GBool PreScanOutputDev::beginTransparencyGroup( 252 GfxState *state, double *bbox, 253 GfxColorSpace *blendingColorSpace, 254 GBool isolated, GBool knockout, 255 GBool forSoftMask) { 256 transparency = gTrue; 257 gdi = gFalse; 258 return gTrue; 259 } 260 261 void PreScanOutputDev::check(GfxState *state, 262 GfxColorSpace *colorSpace, GfxColor *color, 263 double opacity, GfxBlendMode blendMode) { 264 GfxGray gr; 265 GfxCMYK cmyk; 266 GfxRGB rgb; 267 268 if (colorSpace->getMode() == csPattern) { 269 mono = gFalse; 270 gray = gFalse; 271 gdi = gFalse; 272 } else if (colorSpace->getMode() == csDeviceGray || 273 colorSpace->getMode() == csCalGray) { 274 colorSpace->getGray(color, &gr, state->getRenderingIntent()); 275 if (!(gr == 0 || gr == gfxColorComp1)) { 276 mono = gFalse; 277 } 278 } else if (colorSpace->getMode() == csDeviceCMYK) { 279 colorSpace->getCMYK(color, &cmyk, state->getRenderingIntent()); 280 if (cmyk.c != 0 || cmyk.m != 0 || cmyk.y != 0) { 281 mono = gFalse; 282 gray = gFalse; 283 } else if (!(cmyk.k == 0 || cmyk.k == gfxColorComp1)) { 284 mono = gFalse; 285 } 286 } else { 287 colorSpace->getRGB(color, &rgb, state->getRenderingIntent()); 288 if (rgb.r != rgb.g || rgb.g != rgb.b || rgb.b != rgb.r) { 289 mono = gFalse; 290 gray = gFalse; 291 } else if (!((rgb.r == 0 && rgb.g == 0 && rgb.b == 0) || 292 (rgb.r == gfxColorComp1 && 293 rgb.g == gfxColorComp1 && 294 rgb.b == gfxColorComp1))) { 295 mono = gFalse; 296 } 297 } 298 if (opacity != 1 || blendMode != gfxBlendNormal) { 299 transparency = gTrue; 300 } 301 } 302 303 void PreScanOutputDev::clearStats() { 304 mono = gTrue; 305 gray = gTrue; 306 transparency = gFalse; 307 patternImgMask = gFalse; 308 gdi = gTrue; 309 }