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-rw-r--r--xpdf/PreScanOutputDev.cc309
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diff --git a/xpdf/PreScanOutputDev.cc b/xpdf/PreScanOutputDev.cc
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+//========================================================================
+//
+// PreScanOutputDev.cc
+//
+// Copyright 2005 Glyph & Cog, LLC
+//
+//========================================================================
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma implementation
+#endif
+
+#include <math.h>
+#include "gmempp.h"
+#include "GlobalParams.h"
+#include "Page.h"
+#include "Gfx.h"
+#include "GfxFont.h"
+#include "Link.h"
+#include "PreScanOutputDev.h"
+
+//------------------------------------------------------------------------
+// PreScanOutputDev
+//------------------------------------------------------------------------
+
+PreScanOutputDev::PreScanOutputDev() {
+ clearStats();
+}
+
+PreScanOutputDev::~PreScanOutputDev() {
+}
+
+void PreScanOutputDev::startPage(int pageNum, GfxState *state) {
+}
+
+void PreScanOutputDev::endPage() {
+}
+
+void PreScanOutputDev::stroke(GfxState *state) {
+ double *dash;
+ int dashLen;
+ double dashStart;
+
+ check(state, state->getStrokeColorSpace(), state->getStrokeColor(),
+ state->getStrokeOpacity(), state->getBlendMode());
+ state->getLineDash(&dash, &dashLen, &dashStart);
+ if (dashLen != 0) {
+ gdi = gFalse;
+ }
+}
+
+void PreScanOutputDev::fill(GfxState *state) {
+ check(state, state->getFillColorSpace(), state->getFillColor(),
+ state->getFillOpacity(), state->getBlendMode());
+}
+
+void PreScanOutputDev::eoFill(GfxState *state) {
+ check(state, state->getFillColorSpace(), state->getFillColor(),
+ state->getFillOpacity(), state->getBlendMode());
+}
+
+void PreScanOutputDev::tilingPatternFill(GfxState *state, Gfx *gfx,
+ Object *strRef,
+ int paintType, int tilingType,
+ Dict *resDict,
+ double *mat, double *bbox,
+ int x0, int y0, int x1, int y1,
+ double xStep, double yStep) {
+ if (paintType == 1) {
+ gfx->drawForm(strRef, resDict, mat, bbox);
+ } else {
+ check(state, state->getFillColorSpace(), state->getFillColor(),
+ state->getFillOpacity(), state->getBlendMode());
+ }
+}
+
+GBool PreScanOutputDev::shadedFill(GfxState *state, GfxShading *shading) {
+ if (shading->getColorSpace()->getMode() != csDeviceGray &&
+ shading->getColorSpace()->getMode() != csCalGray) {
+ gray = gFalse;
+ }
+ mono = gFalse;
+ if (state->getFillOpacity() != 1 ||
+ state->getBlendMode() != gfxBlendNormal) {
+ transparency = gTrue;
+ }
+ return gTrue;
+}
+
+void PreScanOutputDev::clip(GfxState *state) {
+ //~ check for a rectangle "near" the edge of the page;
+ //~ else set gdi to false
+}
+
+void PreScanOutputDev::eoClip(GfxState *state) {
+ //~ see clip()
+}
+
+void PreScanOutputDev::beginStringOp(GfxState *state) {
+ int render;
+ GfxFont *font;
+ double m11, m12, m21, m22;
+ GBool simpleTTF;
+
+ render = state->getRender();
+ if (!(render & 1)) {
+ check(state, state->getFillColorSpace(), state->getFillColor(),
+ state->getFillOpacity(), state->getBlendMode());
+ }
+ if ((render & 3) == 1 || (render & 3) == 2) {
+ check(state, state->getStrokeColorSpace(), state->getStrokeColor(),
+ state->getStrokeOpacity(), state->getBlendMode());
+ }
+
+ font = state->getFont();
+ state->getFontTransMat(&m11, &m12, &m21, &m22);
+ //~ this should check for external fonts that are non-TrueType
+ simpleTTF = fabs(m11 + m22) < 0.01 &&
+ m11 > 0 &&
+ fabs(m12) < 0.01 &&
+ fabs(m21) < 0.01 &&
+ fabs(state->getHorizScaling() - 1) < 0.001 &&
+ (font->getType() == fontTrueType ||
+ font->getType() == fontTrueTypeOT);
+ if (simpleTTF) {
+ //~ need to create a FoFiTrueType object, and check for a Unicode cmap
+ }
+ if (state->getRender() != 0 || !simpleTTF) {
+ gdi = gFalse;
+ }
+}
+
+void PreScanOutputDev::endStringOp(GfxState *state) {
+}
+
+GBool PreScanOutputDev::beginType3Char(GfxState *state, double x, double y,
+ double dx, double dy,
+ CharCode code, Unicode *u, int uLen) {
+ // return false so all Type 3 chars get rendered (no caching)
+ return gFalse;
+}
+
+void PreScanOutputDev::endType3Char(GfxState *state) {
+}
+
+void PreScanOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
+ int width, int height, GBool invert,
+ GBool inlineImg, GBool interpolate) {
+ check(state, state->getFillColorSpace(), state->getFillColor(),
+ state->getFillOpacity(), state->getBlendMode());
+ if (state->getFillColorSpace()->getMode() == csPattern) {
+ patternImgMask = gTrue;
+ }
+ gdi = gFalse;
+
+ if (inlineImg) {
+ str->reset();
+ str->discardChars(height * ((width + 7) / 8));
+ str->close();
+ }
+}
+
+void PreScanOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
+ int width, int height,
+ GfxImageColorMap *colorMap,
+ int *maskColors, GBool inlineImg,
+ GBool interpolate) {
+ GfxColorSpace *colorSpace;
+
+ colorSpace = colorMap->getColorSpace();
+ if (colorSpace->getMode() == csIndexed) {
+ colorSpace = ((GfxIndexedColorSpace *)colorSpace)->getBase();
+ }
+ if (colorSpace->getMode() == csDeviceGray ||
+ colorSpace->getMode() == csCalGray) {
+ if (colorMap->getBits() > 1) {
+ mono = gFalse;
+ }
+ } else {
+ gray = gFalse;
+ mono = gFalse;
+ }
+ if (state->getFillOpacity() != 1 ||
+ state->getBlendMode() != gfxBlendNormal) {
+ transparency = gTrue;
+ }
+ gdi = gFalse;
+
+ if (inlineImg) {
+ str->reset();
+ str->discardChars(height * ((width * colorMap->getNumPixelComps() *
+ colorMap->getBits() + 7) / 8));
+ str->close();
+ }
+}
+
+void PreScanOutputDev::drawMaskedImage(GfxState *state, Object *ref,
+ Stream *str,
+ int width, int height,
+ GfxImageColorMap *colorMap,
+ Object *maskRef, Stream *maskStr,
+ int maskWidth, int maskHeight,
+ GBool maskInvert, GBool interpolate) {
+ GfxColorSpace *colorSpace;
+
+ colorSpace = colorMap->getColorSpace();
+ if (colorSpace->getMode() == csIndexed) {
+ colorSpace = ((GfxIndexedColorSpace *)colorSpace)->getBase();
+ }
+ if (colorSpace->getMode() == csDeviceGray ||
+ colorSpace->getMode() == csCalGray) {
+ if (colorMap->getBits() > 1) {
+ mono = gFalse;
+ }
+ } else {
+ gray = gFalse;
+ mono = gFalse;
+ }
+ if (state->getFillOpacity() != 1 ||
+ state->getBlendMode() != gfxBlendNormal) {
+ transparency = gTrue;
+ }
+ gdi = gFalse;
+}
+
+void PreScanOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref,
+ Stream *str,
+ int width, int height,
+ GfxImageColorMap *colorMap,
+ Object *maskRef, Stream *maskStr,
+ int maskWidth, int maskHeight,
+ GfxImageColorMap *maskColorMap,
+ double *matte, GBool interpolate) {
+ GfxColorSpace *colorSpace;
+
+ colorSpace = colorMap->getColorSpace();
+ if (colorSpace->getMode() == csIndexed) {
+ colorSpace = ((GfxIndexedColorSpace *)colorSpace)->getBase();
+ }
+ if (colorSpace->getMode() != csDeviceGray &&
+ colorSpace->getMode() != csCalGray) {
+ gray = gFalse;
+ }
+ mono = gFalse;
+ transparency = gTrue;
+ gdi = gFalse;
+}
+
+GBool PreScanOutputDev::beginTransparencyGroup(
+ GfxState *state, double *bbox,
+ GfxColorSpace *blendingColorSpace,
+ GBool isolated, GBool knockout,
+ GBool forSoftMask) {
+ transparency = gTrue;
+ gdi = gFalse;
+ return gTrue;
+}
+
+void PreScanOutputDev::check(GfxState *state,
+ GfxColorSpace *colorSpace, GfxColor *color,
+ double opacity, GfxBlendMode blendMode) {
+ GfxGray gr;
+ GfxCMYK cmyk;
+ GfxRGB rgb;
+
+ if (colorSpace->getMode() == csPattern) {
+ mono = gFalse;
+ gray = gFalse;
+ gdi = gFalse;
+ } else if (colorSpace->getMode() == csDeviceGray ||
+ colorSpace->getMode() == csCalGray) {
+ colorSpace->getGray(color, &gr, state->getRenderingIntent());
+ if (!(gr == 0 || gr == gfxColorComp1)) {
+ mono = gFalse;
+ }
+ } else if (colorSpace->getMode() == csDeviceCMYK) {
+ colorSpace->getCMYK(color, &cmyk, state->getRenderingIntent());
+ if (cmyk.c != 0 || cmyk.m != 0 || cmyk.y != 0) {
+ mono = gFalse;
+ gray = gFalse;
+ } else if (!(cmyk.k == 0 || cmyk.k == gfxColorComp1)) {
+ mono = gFalse;
+ }
+ } else {
+ colorSpace->getRGB(color, &rgb, state->getRenderingIntent());
+ if (rgb.r != rgb.g || rgb.g != rgb.b || rgb.b != rgb.r) {
+ mono = gFalse;
+ gray = gFalse;
+ } else if (!((rgb.r == 0 && rgb.g == 0 && rgb.b == 0) ||
+ (rgb.r == gfxColorComp1 &&
+ rgb.g == gfxColorComp1 &&
+ rgb.b == gfxColorComp1))) {
+ mono = gFalse;
+ }
+ }
+ if (opacity != 1 || blendMode != gfxBlendNormal) {
+ transparency = gTrue;
+ }
+}
+
+void PreScanOutputDev::clearStats() {
+ mono = gTrue;
+ gray = gTrue;
+ transparency = gFalse;
+ patternImgMask = gFalse;
+ gdi = gTrue;
+}
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