+#include <stddef.h>
+#include <math.h>
+#include <string.h> // for memcpy()
+#include "gmem.h"
+#include "Error.h"
+#include "Object.h"
+#include "Array.h"
+#include "Page.h"
+#include "GfxState.h"
+
+//------------------------------------------------------------------------
+
+static inline double clip01(double x) {
+ return (x < 0) ? 0 : ((x > 1) ? 1 : x);
+}
+
+//------------------------------------------------------------------------
+
+static char *gfxColorSpaceModeNames[] = {
+ "DeviceGray",
+ "CalGray",
+ "DeviceRGB",
+ "CalRGB",
+ "DeviceCMYK",
+ "Lab",
+ "ICCBased",
+ "Indexed",
+ "Separation",
+ "DeviceN",
+ "Pattern"
+};
+
+#define nGfxColorSpaceModes ((sizeof(gfxColorSpaceModeNames) / sizeof(char *)))
+
+//------------------------------------------------------------------------
+// GfxColorSpace
+//------------------------------------------------------------------------
+
+GfxColorSpace::GfxColorSpace() {
+}
+
+GfxColorSpace::~GfxColorSpace() {
+}
+
+GfxColorSpace *GfxColorSpace::parse(Object *csObj) {
+ GfxColorSpace *cs;
+ Object obj1;
+
+ cs = NULL;
+ if (csObj->isName()) {
+ if (csObj->isName("DeviceGray") || csObj->isName("G")) {
+ cs = new GfxDeviceGrayColorSpace();
+ } else if (csObj->isName("DeviceRGB") || csObj->isName("RGB")) {
+ cs = new GfxDeviceRGBColorSpace();
+ } else if (csObj->isName("DeviceCMYK") || csObj->isName("CMYK")) {
+ cs = new GfxDeviceCMYKColorSpace();
+ } else if (csObj->isName("Pattern")) {
+ cs = new GfxPatternColorSpace(NULL);
+ } else {
+ error(-1, "Bad color space '%s'", csObj->getName());
+ }
+ } else if (csObj->isArray()) {
+ csObj->arrayGet(0, &obj1);
+ if (obj1.isName("DeviceGray") || obj1.isName("G")) {
+ cs = new GfxDeviceGrayColorSpace();
+ } else if (obj1.isName("DeviceRGB") || obj1.isName("RGB")) {
+ cs = new GfxDeviceRGBColorSpace();
+ } else if (obj1.isName("DeviceCMYK") || obj1.isName("CMYK")) {
+ cs = new GfxDeviceCMYKColorSpace();
+ } else if (obj1.isName("CalGray")) {
+ cs = GfxCalGrayColorSpace::parse(csObj->getArray());
+ } else if (obj1.isName("CalRGB")) {
+ cs = GfxCalRGBColorSpace::parse(csObj->getArray());
+ } else if (obj1.isName("Lab")) {
+ cs = GfxLabColorSpace::parse(csObj->getArray());
+ } else if (obj1.isName("ICCBased")) {
+ cs = GfxICCBasedColorSpace::parse(csObj->getArray());
+ } else if (obj1.isName("Indexed") || obj1.isName("I")) {
+ cs = GfxIndexedColorSpace::parse(csObj->getArray());
+ } else if (obj1.isName("Separation")) {
+ cs = GfxSeparationColorSpace::parse(csObj->getArray());
+ } else if (obj1.isName("DeviceN")) {
+ cs = GfxDeviceNColorSpace::parse(csObj->getArray());
+ } else if (obj1.isName("Pattern")) {
+ cs = GfxPatternColorSpace::parse(csObj->getArray());
+ } else {
+ error(-1, "Bad color space");
+ }
+ obj1.free();
+ } else {
+ error(-1, "Bad color space - expected name or array");
+ }
+ return cs;
+}
+
+void GfxColorSpace::getDefaultRanges(double *decodeLow, double *decodeRange,
+ int maxImgPixel) {
+ int i;
+
+ for (i = 0; i < getNComps(); ++i) {
+ decodeLow[i] = 0;
+ decodeRange[i] = 1;
+ }
+}
+
+int GfxColorSpace::getNumColorSpaceModes() {
+ return nGfxColorSpaceModes;
+}
+
+char *GfxColorSpace::getColorSpaceModeName(int idx) {
+ return gfxColorSpaceModeNames[idx];
+}
+
+//------------------------------------------------------------------------
+// GfxDeviceGrayColorSpace
+//------------------------------------------------------------------------
+
+GfxDeviceGrayColorSpace::GfxDeviceGrayColorSpace() {
+}
+
+GfxDeviceGrayColorSpace::~GfxDeviceGrayColorSpace() {
+}
+
+GfxColorSpace *GfxDeviceGrayColorSpace::copy() {
+ return new GfxDeviceGrayColorSpace();
+}
+
+void GfxDeviceGrayColorSpace::getGray(GfxColor *color, double *gray) {
+ *gray = clip01(color->c[0]);
+}
+
+void GfxDeviceGrayColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ rgb->r = rgb->g = rgb->b = clip01(color->c[0]);
+}
+
+void GfxDeviceGrayColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ cmyk->c = cmyk->m = cmyk->y = 0;
+ cmyk->k = clip01(1 - color->c[0]);
+}
+
+//------------------------------------------------------------------------
+// GfxCalGrayColorSpace
+//------------------------------------------------------------------------
+
+GfxCalGrayColorSpace::GfxCalGrayColorSpace() {
+ whiteX = whiteY = whiteZ = 1;
+ blackX = blackY = blackZ = 0;
+ gamma = 1;
+}
+
+GfxCalGrayColorSpace::~GfxCalGrayColorSpace() {
+}
+
+GfxColorSpace *GfxCalGrayColorSpace::copy() {
+ GfxCalGrayColorSpace *cs;
+
+ cs = new GfxCalGrayColorSpace();
+ cs->whiteX = whiteX;
+ cs->whiteY = whiteY;
+ cs->whiteZ = whiteZ;
+ cs->blackX = blackX;
+ cs->blackY = blackY;
+ cs->blackZ = blackZ;
+ cs->gamma = gamma;
+ return cs;
+}
+
+GfxColorSpace *GfxCalGrayColorSpace::parse(Array *arr) {
+ GfxCalGrayColorSpace *cs;
+ Object obj1, obj2, obj3;
+
+ arr->get(1, &obj1);
+ if (!obj1.isDict()) {
+ error(-1, "Bad CalGray color space");
+ obj1.free();
+ return NULL;
+ }
+ cs = new GfxCalGrayColorSpace();
+ if (obj1.dictLookup("WhitePoint", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 3) {
+ obj2.arrayGet(0, &obj3);
+ cs->whiteX = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(1, &obj3);
+ cs->whiteY = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(2, &obj3);
+ cs->whiteZ = obj3.getNum();
+ obj3.free();
+ }
+ obj2.free();
+ if (obj1.dictLookup("BlackPoint", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 3) {
+ obj2.arrayGet(0, &obj3);
+ cs->blackX = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(1, &obj3);
+ cs->blackY = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(2, &obj3);
+ cs->blackZ = obj3.getNum();
+ obj3.free();
+ }
+ obj2.free();
+ if (obj1.dictLookup("Gamma", &obj2)->isNum()) {
+ cs->gamma = obj2.getNum();
+ }
+ obj2.free();
+ obj1.free();
+ return cs;
+}
+
+void GfxCalGrayColorSpace::getGray(GfxColor *color, double *gray) {
+ *gray = clip01(color->c[0]);
+}
+
+void GfxCalGrayColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ rgb->r = rgb->g = rgb->b = clip01(color->c[0]);
+}
+
+void GfxCalGrayColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ cmyk->c = cmyk->m = cmyk->y = 0;
+ cmyk->k = clip01(1 - color->c[0]);
+}
+
+//------------------------------------------------------------------------
+// GfxDeviceRGBColorSpace
+//------------------------------------------------------------------------
+
+GfxDeviceRGBColorSpace::GfxDeviceRGBColorSpace() {
+}
+
+GfxDeviceRGBColorSpace::~GfxDeviceRGBColorSpace() {
+}
+
+GfxColorSpace *GfxDeviceRGBColorSpace::copy() {
+ return new GfxDeviceRGBColorSpace();
+}
+
+void GfxDeviceRGBColorSpace::getGray(GfxColor *color, double *gray) {
+ *gray = clip01(0.299 * color->c[0] +
+ 0.587 * color->c[1] +
+ 0.114 * color->c[2]);
+}
+
+void GfxDeviceRGBColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ rgb->r = clip01(color->c[0]);
+ rgb->g = clip01(color->c[1]);
+ rgb->b = clip01(color->c[2]);
+}
+
+void GfxDeviceRGBColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ double c, m, y, k;
+
+ c = clip01(1 - color->c[0]);
+ m = clip01(1 - color->c[1]);
+ y = clip01(1 - color->c[2]);
+ k = c;
+ if (m < k) {
+ k = m;
+ }
+ if (y < k) {
+ k = y;
+ }
+ cmyk->c = c - k;
+ cmyk->m = m - k;
+ cmyk->y = y - k;
+ cmyk->k = k;
+}
+
+//------------------------------------------------------------------------
+// GfxCalRGBColorSpace
+//------------------------------------------------------------------------
+
+GfxCalRGBColorSpace::GfxCalRGBColorSpace() {
+ whiteX = whiteY = whiteZ = 1;
+ blackX = blackY = blackZ = 0;
+ gammaR = gammaG = gammaB = 1;
+ mat[0] = 1; mat[1] = 0; mat[2] = 0;
+ mat[3] = 0; mat[4] = 1; mat[5] = 0;
+ mat[6] = 0; mat[7] = 0; mat[8] = 1;
+}
+
+GfxCalRGBColorSpace::~GfxCalRGBColorSpace() {
+}
+
+GfxColorSpace *GfxCalRGBColorSpace::copy() {
+ GfxCalRGBColorSpace *cs;
+ int i;
+
+ cs = new GfxCalRGBColorSpace();
+ cs->whiteX = whiteX;
+ cs->whiteY = whiteY;
+ cs->whiteZ = whiteZ;
+ cs->blackX = blackX;
+ cs->blackY = blackY;
+ cs->blackZ = blackZ;
+ cs->gammaR = gammaR;
+ cs->gammaG = gammaG;
+ cs->gammaB = gammaB;
+ for (i = 0; i < 9; ++i) {
+ cs->mat[i] = mat[i];
+ }
+ return cs;
+}
+
+GfxColorSpace *GfxCalRGBColorSpace::parse(Array *arr) {
+ GfxCalRGBColorSpace *cs;
+ Object obj1, obj2, obj3;
+ int i;
+
+ arr->get(1, &obj1);
+ if (!obj1.isDict()) {
+ error(-1, "Bad CalRGB color space");
+ obj1.free();
+ return NULL;
+ }
+ cs = new GfxCalRGBColorSpace();
+ if (obj1.dictLookup("WhitePoint", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 3) {
+ obj2.arrayGet(0, &obj3);
+ cs->whiteX = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(1, &obj3);
+ cs->whiteY = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(2, &obj3);
+ cs->whiteZ = obj3.getNum();
+ obj3.free();
+ }
+ obj2.free();
+ if (obj1.dictLookup("BlackPoint", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 3) {
+ obj2.arrayGet(0, &obj3);
+ cs->blackX = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(1, &obj3);
+ cs->blackY = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(2, &obj3);
+ cs->blackZ = obj3.getNum();
+ obj3.free();
+ }
+ obj2.free();
+ if (obj1.dictLookup("Gamma", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 3) {
+ obj2.arrayGet(0, &obj3);
+ cs->gammaR = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(1, &obj3);
+ cs->gammaG = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(2, &obj3);
+ cs->gammaB = obj3.getNum();
+ obj3.free();
+ }
+ obj2.free();
+ if (obj1.dictLookup("Matrix", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 9) {
+ for (i = 0; i < 9; ++i) {
+ obj2.arrayGet(i, &obj3);
+ cs->mat[i] = obj3.getNum();
+ obj3.free();
+ }
+ }
+ obj2.free();
+ obj1.free();
+ return cs;
+}
+
+void GfxCalRGBColorSpace::getGray(GfxColor *color, double *gray) {
+ *gray = clip01(0.299 * color->c[0] +
+ 0.587 * color->c[1] +
+ 0.114 * color->c[2]);
+}
+
+void GfxCalRGBColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ rgb->r = clip01(color->c[0]);
+ rgb->g = clip01(color->c[1]);
+ rgb->b = clip01(color->c[2]);
+}
+
+void GfxCalRGBColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ double c, m, y, k;
+
+ c = clip01(1 - color->c[0]);
+ m = clip01(1 - color->c[1]);
+ y = clip01(1 - color->c[2]);
+ k = c;
+ if (m < k) {
+ k = m;
+ }
+ if (y < k) {
+ k = y;
+ }
+ cmyk->c = c - k;
+ cmyk->m = m - k;
+ cmyk->y = y - k;
+ cmyk->k = k;
+}
+
+//------------------------------------------------------------------------
+// GfxDeviceCMYKColorSpace
+//------------------------------------------------------------------------
+
+GfxDeviceCMYKColorSpace::GfxDeviceCMYKColorSpace() {
+}
+
+GfxDeviceCMYKColorSpace::~GfxDeviceCMYKColorSpace() {
+}
+
+GfxColorSpace *GfxDeviceCMYKColorSpace::copy() {
+ return new GfxDeviceCMYKColorSpace();
+}
+
+void GfxDeviceCMYKColorSpace::getGray(GfxColor *color, double *gray) {
+ *gray = clip01(1 - color->c[3]
+ - 0.299 * color->c[0]
+ - 0.587 * color->c[1]
+ - 0.114 * color->c[2]);
+}
+
+void GfxDeviceCMYKColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ double c, m, y, aw, ac, am, ay, ar, ag, ab;
+
+ /* FIXME ask Derek */
+ if (color->c[0] == 0.0 && color->c[1] == 0 && color->c[2] == 0) {
+ rgb->r = rgb->g = rgb->b = 1 - color->c[3];
+ return;
+ }
+
+ 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]);
+ cmyk->k = clip01(color->c[3]);
+}
+
+//------------------------------------------------------------------------
+// GfxLabColorSpace
+//------------------------------------------------------------------------
+
+// This is the inverse of MatrixLMN in Example 4.10 from the PostScript
+// Language Reference, Third Edition.
+static double xyzrgb[3][3] = {
+ { 3.240449, -1.537136, -0.498531 },
+ { -0.969265, 1.876011, 0.041556 },
+ { 0.055643, -0.204026, 1.057229 }
+};
+
+GfxLabColorSpace::GfxLabColorSpace() {
+ whiteX = whiteY = whiteZ = 1;
+ blackX = blackY = blackZ = 0;
+ aMin = bMin = -100;
+ aMax = bMax = 100;
+}
+
+GfxLabColorSpace::~GfxLabColorSpace() {
+}
+
+GfxColorSpace *GfxLabColorSpace::copy() {
+ GfxLabColorSpace *cs;
+
+ cs = new GfxLabColorSpace();
+ cs->whiteX = whiteX;
+ cs->whiteY = whiteY;
+ cs->whiteZ = whiteZ;
+ cs->blackX = blackX;
+ cs->blackY = blackY;
+ cs->blackZ = blackZ;
+ cs->aMin = aMin;
+ cs->aMax = aMax;
+ cs->bMin = bMin;
+ cs->bMax = bMax;
+ cs->kr = kr;
+ cs->kg = kg;
+ cs->kb = kb;
+ return cs;
+}
+
+GfxColorSpace *GfxLabColorSpace::parse(Array *arr) {
+ GfxLabColorSpace *cs;
+ Object obj1, obj2, obj3;
+
+ arr->get(1, &obj1);
+ if (!obj1.isDict()) {
+ error(-1, "Bad Lab color space");
+ obj1.free();
+ return NULL;
+ }
+ cs = new GfxLabColorSpace();
+ if (obj1.dictLookup("WhitePoint", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 3) {
+ obj2.arrayGet(0, &obj3);
+ cs->whiteX = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(1, &obj3);
+ cs->whiteY = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(2, &obj3);
+ cs->whiteZ = obj3.getNum();
+ obj3.free();
+ }
+ obj2.free();
+ if (obj1.dictLookup("BlackPoint", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 3) {
+ obj2.arrayGet(0, &obj3);
+ cs->blackX = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(1, &obj3);
+ cs->blackY = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(2, &obj3);
+ cs->blackZ = obj3.getNum();
+ obj3.free();
+ }
+ obj2.free();
+ if (obj1.dictLookup("Range", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 4) {
+ obj2.arrayGet(0, &obj3);
+ cs->aMin = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(1, &obj3);
+ cs->aMax = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(2, &obj3);
+ cs->bMin = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(3, &obj3);
+ cs->bMax = obj3.getNum();
+ obj3.free();
+ }
+ obj2.free();
+ obj1.free();
+
+ cs->kr = 1 / (xyzrgb[0][0] * cs->whiteX +
+ xyzrgb[0][1] * cs->whiteY +
+ xyzrgb[0][2] * cs->whiteZ);
+ cs->kg = 1 / (xyzrgb[1][0] * cs->whiteX +
+ xyzrgb[1][1] * cs->whiteY +
+ xyzrgb[1][2] * cs->whiteZ);
+ cs->kb = 1 / (xyzrgb[2][0] * cs->whiteX +
+ xyzrgb[2][1] * cs->whiteY +
+ xyzrgb[2][2] * cs->whiteZ);
+
+ return cs;
+}
+
+void GfxLabColorSpace::getGray(GfxColor *color, double *gray) {
+ GfxRGB rgb;
+
+ getRGB(color, &rgb);
+ *gray = clip01(0.299 * rgb.r +
+ 0.587 * rgb.g +
+ 0.114 * rgb.b);
+}
+
+void GfxLabColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ double X, Y, Z;
+ double t1, t2;
+ double r, g, b;
+
+ // convert L*a*b* to CIE 1931 XYZ color space
+ t1 = (color->c[0] + 16) / 116;
+ t2 = t1 + color->c[1] / 500;
+ if (t2 >= (6.0 / 29.0)) {
+ X = t2 * t2 * t2;
+ } else {
+ X = (108.0 / 841.0) * (t2 - (4.0 / 29.0));
+ }
+ X *= whiteX;
+ if (t1 >= (6.0 / 29.0)) {
+ Y = t1 * t1 * t1;
+ } else {
+ Y = (108.0 / 841.0) * (t1 - (4.0 / 29.0));
+ }
+ Y *= whiteY;
+ t2 = t1 - color->c[2] / 200;
+ if (t2 >= (6.0 / 29.0)) {
+ Z = t2 * t2 * t2;
+ } else {
+ Z = (108.0 / 841.0) * (t2 - (4.0 / 29.0));
+ }
+ Z *= whiteZ;
+
+ // convert XYZ to RGB, including gamut mapping and gamma correction
+ r = xyzrgb[0][0] * X + xyzrgb[0][1] * Y + xyzrgb[0][2] * Z;
+ g = xyzrgb[1][0] * X + xyzrgb[1][1] * Y + xyzrgb[1][2] * Z;
+ b = xyzrgb[2][0] * X + xyzrgb[2][1] * Y + xyzrgb[2][2] * Z;
+ rgb->r = pow(clip01(r * kr), 0.5);
+ rgb->g = pow(clip01(g * kg), 0.5);
+ rgb->b = pow(clip01(b * kb), 0.5);
+}
+
+void GfxLabColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ GfxRGB rgb;
+ double c, m, y, k;
+
+ getRGB(color, &rgb);
+ c = clip01(1 - rgb.r);
+ m = clip01(1 - rgb.g);
+ y = clip01(1 - rgb.b);
+ k = c;
+ if (m < k) {
+ k = m;
+ }
+ if (y < k) {
+ k = y;
+ }
+ cmyk->c = c - k;
+ cmyk->m = m - k;
+ cmyk->y = y - k;
+ cmyk->k = k;
+}
+
+void GfxLabColorSpace::getDefaultRanges(double *decodeLow, double *decodeRange,
+ int maxImgPixel) {
+ decodeLow[0] = 0;
+ decodeRange[0] = 100;
+ decodeLow[1] = aMin;
+ decodeRange[1] = aMax - aMin;
+ decodeLow[2] = bMin;
+ decodeRange[2] = bMax - bMin;
+}
+
+//------------------------------------------------------------------------
+// GfxICCBasedColorSpace
+//------------------------------------------------------------------------
+
+GfxICCBasedColorSpace::GfxICCBasedColorSpace(int nCompsA, GfxColorSpace *altA,
+ Ref *iccProfileStreamA) {
+ nComps = nCompsA;
+ alt = altA;
+ iccProfileStream = *iccProfileStreamA;
+ rangeMin[0] = rangeMin[1] = rangeMin[2] = rangeMin[3] = 0;
+ rangeMax[0] = rangeMax[1] = rangeMax[2] = rangeMax[3] = 1;
+}
+
+GfxICCBasedColorSpace::~GfxICCBasedColorSpace() {
+ delete alt;
+}
+
+GfxColorSpace *GfxICCBasedColorSpace::copy() {
+ GfxICCBasedColorSpace *cs;
+ int i;
+
+ cs = new GfxICCBasedColorSpace(nComps, alt->copy(), &iccProfileStream);
+ for (i = 0; i < 4; ++i) {
+ cs->rangeMin[i] = rangeMin[i];
+ cs->rangeMax[i] = rangeMax[i];
+ }
+ return cs;
+}
+
+GfxColorSpace *GfxICCBasedColorSpace::parse(Array *arr) {
+ GfxICCBasedColorSpace *cs;
+ Ref iccProfileStreamA;
+ int nCompsA;
+ GfxColorSpace *altA;
+ Dict *dict;
+ Object obj1, obj2, obj3;
+ int i;
+
+ arr->getNF(1, &obj1);
+ if (obj1.isRef()) {
+ iccProfileStreamA = obj1.getRef();
+ } else {
+ iccProfileStreamA.num = 0;
+ iccProfileStreamA.gen = 0;
+ }
+ obj1.free();
+ arr->get(1, &obj1);
+ if (!obj1.isStream()) {
+ error(-1, "Bad ICCBased color space (stream)");
+ obj1.free();
+ return NULL;
+ }
+ dict = obj1.streamGetDict();
+ if (!dict->lookup("N", &obj2)->isInt()) {
+ error(-1, "Bad ICCBased color space (N)");
+ obj2.free();
+ obj1.free();
+ return NULL;
+ }
+ nCompsA = obj2.getInt();
+ obj2.free();
+ if (nCompsA > gfxColorMaxComps) {
+ error(-1, "ICCBased color space with too many (%d > %d) components",
+ nCompsA, gfxColorMaxComps);
+ nCompsA = gfxColorMaxComps;
+ }
+ if (dict->lookup("Alternate", &obj2)->isNull() ||
+ !(altA = GfxColorSpace::parse(&obj2))) {
+ switch (nCompsA) {
+ case 1:
+ altA = new GfxDeviceGrayColorSpace();
+ break;
+ case 3:
+ altA = new GfxDeviceRGBColorSpace();
+ break;
+ case 4:
+ altA = new GfxDeviceCMYKColorSpace();
+ break;
+ default:
+ error(-1, "Bad ICCBased color space - invalid N");
+ obj2.free();
+ obj1.free();
+ return NULL;
+ }
+ }
+ obj2.free();
+ cs = new GfxICCBasedColorSpace(nCompsA, altA, &iccProfileStreamA);
+ if (dict->lookup("Range", &obj2)->isArray() &&
+ obj2.arrayGetLength() == 2 * nCompsA) {
+ for (i = 0; i < nCompsA; ++i) {
+ obj2.arrayGet(2*i, &obj3);
+ cs->rangeMin[i] = obj3.getNum();
+ obj3.free();
+ obj2.arrayGet(2*i+1, &obj3);
+ cs->rangeMax[i] = obj3.getNum();
+ obj3.free();
+ }
+ }
+ obj2.free();
+ obj1.free();
+ return cs;
+}
+
+void GfxICCBasedColorSpace::getGray(GfxColor *color, double *gray) {
+ alt->getGray(color, gray);
+}
+
+void GfxICCBasedColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ alt->getRGB(color, rgb);
+}
+
+void GfxICCBasedColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ alt->getCMYK(color, cmyk);
+}
+
+void GfxICCBasedColorSpace::getDefaultRanges(double *decodeLow,
+ double *decodeRange,
+ int maxImgPixel) {
+ alt->getDefaultRanges(decodeLow, decodeRange, maxImgPixel);
+
+#if 0
+ // this is nominally correct, but some PDF files don't set the
+ // correct ranges in the ICCBased dict
+ int i;
+
+ for (i = 0; i < nComps; ++i) {
+ decodeLow[i] = rangeMin[i];
+ decodeRange[i] = rangeMax[i] - rangeMin[i];
+ }
+#endif
+}
+
+//------------------------------------------------------------------------
+// GfxIndexedColorSpace
+//------------------------------------------------------------------------
+
+GfxIndexedColorSpace::GfxIndexedColorSpace(GfxColorSpace *baseA,
+ int indexHighA) {
+ base = baseA;
+ indexHigh = indexHighA;
+ lookup = (Guchar *)gmalloc((indexHigh + 1) * base->getNComps() *
+ sizeof(Guchar));
+}
+
+GfxIndexedColorSpace::~GfxIndexedColorSpace() {
+ delete base;
+ gfree(lookup);
+}
+
+GfxColorSpace *GfxIndexedColorSpace::copy() {
+ GfxIndexedColorSpace *cs;
+
+ cs = new GfxIndexedColorSpace(base->copy(), indexHigh);
+ memcpy(cs->lookup, lookup,
+ (indexHigh + 1) * base->getNComps() * sizeof(Guchar));
+ return cs;
+}
+
+GfxColorSpace *GfxIndexedColorSpace::parse(Array *arr) {
+ GfxIndexedColorSpace *cs;
+ GfxColorSpace *baseA;
+ int indexHighA;
+ Object obj1;
+ int x;
+ char *s;
+ int n, i, j;
+
+ if (arr->getLength() != 4) {
+ error(-1, "Bad Indexed color space");
+ goto err1;
+ }
+ arr->get(1, &obj1);
+ if (!(baseA = GfxColorSpace::parse(&obj1))) {
+ error(-1, "Bad Indexed color space (base color space)");
+ goto err2;
+ }
+ obj1.free();
+ if (!arr->get(2, &obj1)->isInt()) {
+ error(-1, "Bad Indexed color space (hival)");
+ delete baseA;
+ goto err2;
+ }
+ indexHighA = obj1.getInt();
+ if (indexHighA < 0 || indexHighA > 255) {
+ // the PDF spec requires indexHigh to be in [0,255] -- allowing
+ // values larger than 255 creates a security hole: if nComps *
+ // indexHigh is greater than 2^31, the loop below may overwrite
+ // past the end of the array
+ error(-1, "Bad Indexed color space (invalid indexHigh value)");
+ delete baseA;
+ goto err2;
+ }
+ obj1.free();
+ cs = new GfxIndexedColorSpace(baseA, indexHighA);
+ arr->get(3, &obj1);
+ n = baseA->getNComps();
+ if (obj1.isStream()) {
+ obj1.streamReset();
+ for (i = 0; i <= indexHighA; ++i) {
+ for (j = 0; j < n; ++j) {
+ if ((x = obj1.streamGetChar()) == EOF) {
+ error(-1, "Bad Indexed color space (lookup table stream too short)");
+ goto err3;
+ }
+ cs->lookup[i*n + j] = (Guchar)x;
+ }
+ }
+ obj1.streamClose();
+ } else if (obj1.isString()) {
+ if (obj1.getString()->getLength() < (indexHighA + 1) * n) {
+ error(-1, "Bad Indexed color space (lookup table string too short)");
+ goto err3;
+ }
+ s = obj1.getString()->getCString();
+ for (i = 0; i <= indexHighA; ++i) {
+ for (j = 0; j < n; ++j) {
+ cs->lookup[i*n + j] = (Guchar)*s++;
+ }
+ }
+ } else {
+ error(-1, "Bad Indexed color space (lookup table)");
+ goto err3;
+ }
+ obj1.free();
+ return cs;
+
+ err3:
+ delete cs;
+ err2:
+ obj1.free();
+ err1:
+ return NULL;
+}
+
+GfxColor *GfxIndexedColorSpace::mapColorToBase(GfxColor *color,
+ GfxColor *baseColor) {
+ Guchar *p;
+ double low[gfxColorMaxComps], range[gfxColorMaxComps];
+ int n, i;
+
+ n = base->getNComps();
+ base->getDefaultRanges(low, range, indexHigh);
+ p = &lookup[(int)(color->c[0] + 0.5) * n];
+ for (i = 0; i < n; ++i) {
+ baseColor->c[i] = low[i] + (p[i] / 255.0) * range[i];
+ }
+ return baseColor;
+}
+
+void GfxIndexedColorSpace::getGray(GfxColor *color, double *gray) {
+ GfxColor color2;
+
+ base->getGray(mapColorToBase(color, &color2), gray);
+}
+
+void GfxIndexedColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ GfxColor color2;
+
+ base->getRGB(mapColorToBase(color, &color2), rgb);
+}
+
+void GfxIndexedColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ GfxColor color2;
+
+ base->getCMYK(mapColorToBase(color, &color2), cmyk);
+}
+
+void GfxIndexedColorSpace::getDefaultRanges(double *decodeLow,
+ double *decodeRange,
+ int maxImgPixel) {
+ decodeLow[0] = 0;
+ decodeRange[0] = maxImgPixel;
+}
+
+//------------------------------------------------------------------------
+// GfxSeparationColorSpace
+//------------------------------------------------------------------------
+
+GfxSeparationColorSpace::GfxSeparationColorSpace(GString *nameA,
+ GfxColorSpace *altA,
+ Function *funcA) {
+ name = nameA;
+ alt = altA;
+ func = funcA;
+}
+
+GfxSeparationColorSpace::~GfxSeparationColorSpace() {
+ delete name;
+ delete alt;
+ delete func;
+}
+
+GfxColorSpace *GfxSeparationColorSpace::copy() {
+ return new GfxSeparationColorSpace(name->copy(), alt->copy(), func->copy());
+}
+
+//~ handle the 'All' and 'None' colorants
+GfxColorSpace *GfxSeparationColorSpace::parse(Array *arr) {
+ GfxSeparationColorSpace *cs;
+ GString *nameA;
+ GfxColorSpace *altA;
+ Function *funcA;
+ Object obj1;
+
+ if (arr->getLength() != 4) {
+ error(-1, "Bad Separation color space");
+ goto err1;
+ }
+ if (!arr->get(1, &obj1)->isName()) {
+ error(-1, "Bad Separation color space (name)");
+ goto err2;
+ }
+ nameA = new GString(obj1.getName());
+ obj1.free();
+ arr->get(2, &obj1);
+ if (!(altA = GfxColorSpace::parse(&obj1))) {
+ error(-1, "Bad Separation color space (alternate color space)");
+ goto err3;
+ }
+ obj1.free();
+ arr->get(3, &obj1);
+ if (!(funcA = Function::parse(&obj1))) {
+ goto err4;
+ }
+ obj1.free();
+ cs = new GfxSeparationColorSpace(nameA, altA, funcA);
+ return cs;
+
+ err4:
+ delete altA;
+ err3:
+ delete nameA;
+ err2:
+ obj1.free();
+ err1:
+ return NULL;
+}
+
+void GfxSeparationColorSpace::getGray(GfxColor *color, double *gray) {
+ GfxColor color2;
+
+ func->transform(color->c, color2.c);
+ alt->getGray(&color2, gray);
+}
+
+void GfxSeparationColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ GfxColor color2;
+
+ func->transform(color->c, color2.c);
+ alt->getRGB(&color2, rgb);
+}
+
+void GfxSeparationColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ GfxColor color2;
+
+ func->transform(color->c, color2.c);
+ alt->getCMYK(&color2, cmyk);
+}
+
+//------------------------------------------------------------------------
+// GfxDeviceNColorSpace
+//------------------------------------------------------------------------
+
+GfxDeviceNColorSpace::GfxDeviceNColorSpace(int nCompsA,
+ GfxColorSpace *altA,
+ Function *funcA) {
+ nComps = nCompsA;
+ alt = altA;
+ func = funcA;
+}
+
+GfxDeviceNColorSpace::~GfxDeviceNColorSpace() {
+ int i;
+
+ for (i = 0; i < nComps; ++i) {
+ delete names[i];
+ }
+ delete alt;
+ delete func;
+}
+
+GfxColorSpace *GfxDeviceNColorSpace::copy() {
+ GfxDeviceNColorSpace *cs;
+ int i;
+
+ cs = new GfxDeviceNColorSpace(nComps, alt->copy(), func->copy());
+ for (i = 0; i < nComps; ++i) {
+ cs->names[i] = names[i]->copy();
+ }
+ return cs;
+}
+
+//~ handle the 'None' colorant
+GfxColorSpace *GfxDeviceNColorSpace::parse(Array *arr) {
+ GfxDeviceNColorSpace *cs;
+ int nCompsA;
+ GString *namesA[gfxColorMaxComps];
+ GfxColorSpace *altA;
+ Function *funcA;
+ Object obj1, obj2;
+ int i;
+
+ if (arr->getLength() != 4 && arr->getLength() != 5) {
+ error(-1, "Bad DeviceN color space");
+ goto err1;
+ }
+ if (!arr->get(1, &obj1)->isArray()) {
+ error(-1, "Bad DeviceN color space (names)");
+ goto err2;
+ }
+ nCompsA = obj1.arrayGetLength();
+ if (nCompsA > gfxColorMaxComps) {
+ error(-1, "DeviceN color space with too many (%d > %d) components",
+ nCompsA, gfxColorMaxComps);
+ nCompsA = gfxColorMaxComps;
+ }
+ for (i = 0; i < nCompsA; ++i) {
+ if (!obj1.arrayGet(i, &obj2)->isName()) {
+ error(-1, "Bad DeviceN color space (names)");
+ obj2.free();
+ goto err2;
+ }
+ namesA[i] = new GString(obj2.getName());
+ obj2.free();
+ }
+ obj1.free();
+ arr->get(2, &obj1);
+ if (!(altA = GfxColorSpace::parse(&obj1))) {
+ error(-1, "Bad DeviceN color space (alternate color space)");
+ goto err3;
+ }
+ obj1.free();
+ arr->get(3, &obj1);
+ if (!(funcA = Function::parse(&obj1))) {
+ goto err4;
+ }
+ obj1.free();
+ cs = new GfxDeviceNColorSpace(nCompsA, altA, funcA);
+ for (i = 0; i < nCompsA; ++i) {
+ cs->names[i] = namesA[i];
+ }
+ return cs;
+
+ err4:
+ delete altA;
+ err3:
+ for (i = 0; i < nCompsA; ++i) {
+ delete namesA[i];
+ }
+ err2:
+ obj1.free();
+ err1:
+ return NULL;
+}
+
+void GfxDeviceNColorSpace::getGray(GfxColor *color, double *gray) {
+ GfxColor color2;
+
+ func->transform(color->c, color2.c);
+ alt->getGray(&color2, gray);
+}
+
+void GfxDeviceNColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ GfxColor color2;
+
+ func->transform(color->c, color2.c);
+ alt->getRGB(&color2, rgb);
+}
+
+void GfxDeviceNColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ GfxColor color2;
+
+ func->transform(color->c, color2.c);
+ alt->getCMYK(&color2, cmyk);
+}
+
+//------------------------------------------------------------------------
+// GfxPatternColorSpace
+//------------------------------------------------------------------------
+
+GfxPatternColorSpace::GfxPatternColorSpace(GfxColorSpace *underA) {
+ under = underA;
+}
+
+GfxPatternColorSpace::~GfxPatternColorSpace() {
+ if (under) {
+ delete under;
+ }
+}
+
+GfxColorSpace *GfxPatternColorSpace::copy() {
+ return new GfxPatternColorSpace(under ? under->copy() :
+ (GfxColorSpace *)NULL);
+}
+
+GfxColorSpace *GfxPatternColorSpace::parse(Array *arr) {
+ GfxPatternColorSpace *cs;
+ GfxColorSpace *underA;
+ Object obj1;
+
+ if (arr->getLength() != 1 && arr->getLength() != 2) {
+ error(-1, "Bad Pattern color space");
+ return NULL;
+ }
+ underA = NULL;
+ if (arr->getLength() == 2) {
+ arr->get(1, &obj1);
+ if (!(underA = GfxColorSpace::parse(&obj1))) {
+ error(-1, "Bad Pattern color space (underlying color space)");
+ obj1.free();
+ return NULL;
+ }
+ obj1.free();
+ }
+ cs = new GfxPatternColorSpace(underA);
+ return cs;
+}
+
+void GfxPatternColorSpace::getGray(GfxColor *color, double *gray) {
+ *gray = 0;
+}
+
+void GfxPatternColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
+ rgb->r = rgb->g = rgb->b = 0;
+}
+
+void GfxPatternColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
+ cmyk->c = cmyk->m = cmyk->y = 0;
+ cmyk->k = 1;
+}