Diffstat (limited to 'noncore/unsupported/qpdf/xpdf/GfxState.cc') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | noncore/unsupported/qpdf/xpdf/GfxState.cc | 246 |
1 files changed, 235 insertions, 11 deletions
diff --git a/noncore/unsupported/qpdf/xpdf/GfxState.cc b/noncore/unsupported/qpdf/xpdf/GfxState.cc index af4e0d4..befd45a 100644 --- a/noncore/unsupported/qpdf/xpdf/GfxState.cc +++ b/noncore/unsupported/qpdf/xpdf/GfxState.cc @@ -1,11 +1,11 @@ //======================================================================== // // GfxState.cc // -// Copyright 1996 Derek B. Noonburg +// Copyright 1996-2002 Glyph & Cog, LLC // //======================================================================== #ifdef __GNUC__ #pragma implementation #endif @@ -405,15 +405,28 @@ void GfxDeviceCMYKColorSpace::getGray(GfxColor *color, fouble *gray) { - 0.299 * color->c[0] - 0.587 * color->c[1] - 0.114 * color->c[2]); } void GfxDeviceCMYKColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) { - rgb->r = clip01(1 - (color->c[0] + color->c[3])); - rgb->g = clip01(1 - (color->c[1] + color->c[3])); - rgb->b = clip01(1 - (color->c[2] + color->c[3])); + fouble c, m, y, aw, ac, am, ay, ar, ag, ab; + + c = clip01(color->c[0] + color->c[3]); + m = clip01(color->c[1] + color->c[3]); + y = clip01(color->c[2] + color->c[3]); + aw = (1-c) * (1-m) * (1-y); + ac = c * (1-m) * (1-y); + am = (1-c) * m * (1-y); + ay = (1-c) * (1-m) * y; + ar = (1-c) * m * y; + ag = c * (1-m) * y; + ab = c * m * (1-y); + rgb->r = clip01(aw + 0.9137*am + 0.9961*ay + 0.9882*ar); + rgb->g = clip01(aw + 0.6196*ac + ay + 0.5176*ag); + rgb->b = clip01(aw + 0.7804*ac + 0.5412*am + 0.0667*ar + 0.2118*ag + + 0.4863*ab); } void GfxDeviceCMYKColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) { cmyk->c = clip01(color->c[0]); cmyk->m = clip01(color->c[1]); cmyk->y = clip01(color->c[2]); @@ -1265,16 +1278,12 @@ GfxShading *GfxShading::parse(Object *obj) { error(-1, "Invalid ShadingType in shading dictionary"); obj1.free(); goto err1; } typeA = obj1.getInt(); obj1.free(); - if (typeA != 2) { - error(-1, "Unimplemented shading type %d", typeA); - goto err1; - } obj->dictLookup("ColorSpace", &obj1); if (!(colorSpaceA = GfxColorSpace::parse(&obj1))) { error(-1, "Bad color space in shading dictionary"); obj1.free(); goto err1; @@ -1314,13 +1323,23 @@ GfxShading *GfxShading::parse(Object *obj) { } else { error(-1, "Bad BBox in shading dictionary"); } } obj1.free(); - shading = GfxAxialShading::parse(obj->getDict()); + switch (typeA) { + case 2: + shading = GfxAxialShading::parse(obj->getDict()); + break; + case 3: + shading = GfxRadialShading::parse(obj->getDict()); + break; + default: + error(-1, "Unimplemented shading type %d", typeA); + goto err1; + } if (shading) { shading->type = typeA; shading->colorSpace = colorSpaceA; shading->background = backgroundA; shading->hasBackground = hasBackgroundA; @@ -1454,12 +1473,134 @@ void GfxAxialShading::getColor(fouble t, GfxColor *color) { for (i = 0; i < nFuncs; ++i) { funcs[i]->transform(&t, &color->c[i]); } } //------------------------------------------------------------------------ +// GfxRadialShading +//------------------------------------------------------------------------ + +GfxRadialShading::GfxRadialShading(fouble x0A, fouble y0A, fouble r0A, + fouble x1A, fouble y1A, fouble r1A, + fouble t0A, fouble t1A, + Function **funcsA, int nFuncsA, + GBool extend0A, GBool extend1A) { + int i; + + x0 = x0A; + y0 = y0A; + r0 = r0A; + x1 = x1A; + y1 = y1A; + r1 = r1A; + t0 = t0A; + t1 = t1A; + nFuncs = nFuncsA; + for (i = 0; i < nFuncs; ++i) { + funcs[i] = funcsA[i]; + } + extend0 = extend0A; + extend1 = extend1A; +} + +GfxRadialShading::~GfxRadialShading() { + int i; + + for (i = 0; i < nFuncs; ++i) { + delete funcs[i]; + } +} + +GfxRadialShading *GfxRadialShading::parse(Dict *dict) { + fouble x0A, y0A, r0A, x1A, y1A, r1A; + fouble t0A, t1A; + Function *funcsA[gfxColorMaxComps]; + int nFuncsA; + GBool extend0A, extend1A; + Object obj1, obj2; + int i; + + x0A = y0A = r0A = x1A = y1A = r1A = 0; + if (dict->lookup("Coords", &obj1)->isArray() && + obj1.arrayGetLength() == 6) { + x0A = obj1.arrayGet(0, &obj2)->getNum(); + obj2.free(); + y0A = obj1.arrayGet(1, &obj2)->getNum(); + obj2.free(); + r0A = obj1.arrayGet(2, &obj2)->getNum(); + obj2.free(); + x1A = obj1.arrayGet(3, &obj2)->getNum(); + obj2.free(); + y1A = obj1.arrayGet(4, &obj2)->getNum(); + obj2.free(); + r1A = obj1.arrayGet(5, &obj2)->getNum(); + obj2.free(); + } else { + error(-1, "Missing or invalid Coords in shading dictionary"); + goto err1; + } + obj1.free(); + + t0A = 0; + t1A = 1; + if (dict->lookup("Domain", &obj1)->isArray() && + obj1.arrayGetLength() == 2) { + t0A = obj1.arrayGet(0, &obj2)->getNum(); + obj2.free(); + t1A = obj1.arrayGet(1, &obj2)->getNum(); + obj2.free(); + } + obj1.free(); + + dict->lookup("Function", &obj1); + if (obj1.isArray()) { + nFuncsA = obj1.arrayGetLength(); + for (i = 0; i < nFuncsA; ++i) { + obj1.arrayGet(i, &obj2); + if (!(funcsA[i] = Function::parse(&obj2))) { + obj1.free(); + obj2.free(); + goto err1; + } + obj2.free(); + } + } else { + nFuncsA = 1; + if (!(funcsA[0] = Function::parse(&obj1))) { + obj1.free(); + goto err1; + } + } + obj1.free(); + + extend0A = extend1A = gFalse; + if (dict->lookup("Extend", &obj1)->isArray() && + obj1.arrayGetLength() == 2) { + extend0A = obj1.arrayGet(0, &obj2)->getBool(); + obj2.free(); + extend1A = obj1.arrayGet(1, &obj2)->getBool(); + obj2.free(); + } + obj1.free(); + + return new GfxRadialShading(x0A, y0A, r0A, x1A, y1A, r1A, t0A, t1A, + funcsA, nFuncsA, extend0A, extend1A); + + err1: + return NULL; +} + +void GfxRadialShading::getColor(fouble t, GfxColor *color) { + int i; + + for (i = 0; i < nFuncs; ++i) { + funcs[i]->transform(&t, &color->c[i]); + } +} + +//------------------------------------------------------------------------ // GfxImageColorMap //------------------------------------------------------------------------ GfxImageColorMap::GfxImageColorMap(int bitsA, Object *decode, GfxColorSpace *colorSpaceA) { GfxIndexedColorSpace *indexedCS; @@ -1915,12 +2056,73 @@ GfxState::GfxState(GfxState *state) { lineDash = (fouble *)gmalloc(lineDashLength * sizeof(fouble)); memcpy(lineDash, state->lineDash, lineDashLength * sizeof(fouble)); } saved = NULL; } +void GfxState::getUserClipBBox(fouble *xMin, fouble *yMin, + fouble *xMax, fouble *yMax) { + fouble ictm[6]; + fouble xMin1, yMin1, xMax1, yMax1, det, tx, ty; + + // invert the CTM + det = 1 / (ctm[0] * ctm[3] - ctm[1] * ctm[2]); + ictm[0] = ctm[3] * det; + ictm[1] = -ctm[1] * det; + ictm[2] = -ctm[2] * det; + ictm[3] = ctm[0] * det; + ictm[4] = (ctm[2] * ctm[5] - ctm[3] * ctm[4]) * det; + ictm[5] = (ctm[1] * ctm[4] - ctm[0] * ctm[5]) * det; + + // transform all four corners of the clip bbox; find the min and max + // x and y values + xMin1 = xMax1 = clipXMin * ictm[0] + clipYMin * ictm[2] + ictm[4]; + yMin1 = yMax1 = clipXMin * ictm[1] + clipYMin * ictm[3] + ictm[5]; + tx = clipXMin * ictm[0] + clipYMax * ictm[2] + ictm[4]; + ty = clipXMin * ictm[1] + clipYMax * ictm[3] + ictm[5]; + if (tx < xMin1) { + xMin1 = tx; + } else if (tx > xMax1) { + xMax1 = tx; + } + if (ty < yMin1) { + yMin1 = ty; + } else if (ty > yMax1) { + yMax1 = ty; + } + tx = clipXMax * ictm[0] + clipYMin * ictm[2] + ictm[4]; + ty = clipXMax * ictm[1] + clipYMin * ictm[3] + ictm[5]; + if (tx < xMin1) { + xMin1 = tx; + } else if (tx > xMax1) { + xMax1 = tx; + } + if (ty < yMin1) { + yMin1 = ty; + } else if (ty > yMax1) { + yMax1 = ty; + } + tx = clipXMax * ictm[0] + clipYMax * ictm[2] + ictm[4]; + ty = clipXMax * ictm[1] + clipYMax * ictm[3] + ictm[5]; + if (tx < xMin1) { + xMin1 = tx; + } else if (tx > xMax1) { + xMax1 = tx; + } + if (ty < yMin1) { + yMin1 = ty; + } else if (ty > yMax1) { + yMax1 = ty; + } + + *xMin = xMin1; + *yMin = yMin1; + *xMax = xMax1; + *yMax = yMax1; +} + fouble GfxState::transformWidth(fouble w) { fouble x, y; x = ctm[0] + ctm[2]; y = ctm[1] + ctm[3]; return w * sqrt(0.5 * (x * x + y * y)); @@ -1943,33 +2145,54 @@ void GfxState::getFontTransMat(fouble *m11, fouble *m12, *m21 = (textMat[2] * ctm[0] + textMat[3] * ctm[2]) * fontSize; *m22 = (textMat[2] * ctm[1] + textMat[3] * ctm[3]) * fontSize; } void GfxState::setCTM(fouble a, fouble b, fouble c, fouble d, fouble e, fouble f) { + int i; + ctm[0] = a; ctm[1] = b; ctm[2] = c; ctm[3] = d; ctm[4] = e; ctm[5] = f; + + // avoid FP exceptions on badly messed up PDF files + for (i = 0; i < 6; ++i) { + if (ctm[i] > fouble(1e3)) { + ctm[i] = fouble(1e3); + } else if (ctm[i] < -fouble(1e3)) { + ctm[i] = -fouble(1e3); + } + } } void GfxState::concatCTM(fouble a, fouble b, fouble c, fouble d, fouble e, fouble f) { fouble a1 = ctm[0]; fouble b1 = ctm[1]; fouble c1 = ctm[2]; fouble d1 = ctm[3]; + int i; ctm[0] = a * a1 + b * c1; ctm[1] = a * b1 + b * d1; ctm[2] = c * a1 + d * c1; ctm[3] = c * b1 + d * d1; ctm[4] = e * a1 + f * c1 + ctm[4]; ctm[5] = e * b1 + f * d1 + ctm[5]; + + // avoid FP exceptions on badly messed up PDF files + for (i = 0; i < 6; ++i) { + if (ctm[i] > fouble(1e3)) { + ctm[i] = fouble(1e3); + } else if (ctm[i] < -fouble(1e3)) { + ctm[i] = -fouble(1e3); + } + } } void GfxState::setFillColorSpace(GfxColorSpace *colorSpace) { if (fillColorSpace) { delete fillColorSpace; } @@ -2048,16 +2271,16 @@ void GfxState::clip() { } if (yMax < clipYMax) { clipYMax = yMax; } } -void GfxState::textShift(fouble tx) { +void GfxState::textShift(fouble tx, fouble ty) { fouble dx, dy; - textTransformDelta(tx, 0, &dx, &dy); + textTransformDelta(tx, ty, &dx, &dy); curX += dx; curY += dy; } void GfxState::shift(fouble dx, fouble dy) { curX += dx; @@ -2092,6 +2315,7 @@ GfxState *GfxState::restore() { } else { oldState = this; } return oldState; } + |