splash.cc

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      *pipe->destColorPtr++ = cResult0;
      *pipe->destColorPtr++ = cResult1;
      *pipe->destColorPtr++ = cResult2;
      break;
    case splashModeBGR8:
      *pipe->destColorPtr++ = cResult2;
      *pipe->destColorPtr++ = cResult1;
      *pipe->destColorPtr++ = cResult0;
      break;
#if SPLASH_CMYK
    case splashModeCMYK8:
      *pipe->destColorPtr++ = cResult0;
      *pipe->destColorPtr++ = cResult1;
      *pipe->destColorPtr++ = cResult2;
      *pipe->destColorPtr++ = cResult3;
      break;
#endif
    }
    if (pipe->destAlphaPtr) {
      *pipe->destAlphaPtr++ = aResult;
    }

  }

  ++pipe->x;
}

inline void Splash::pipeSetXY(SplashPipe *pipe, int x, int y) {
  pipe->x = x;
  pipe->y = y;
  if (state->softMask) {
    pipe->softMaskPtr =
        &state->softMask->data[y * state->softMask->rowSize + x];
  }
  switch (bitmap->mode) {
  case splashModeMono1:
    pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + (x >> 3)];
    pipe->destColorMask = 0x80 >> (x & 7);
    break;
  case splashModeMono8:
    pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + x];
    break;
  case splashModeRGB8:
  case splashModeBGR8:
    pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + 3 * x];
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    pipe->destColorPtr = &bitmap->data[y * bitmap->rowSize + 4 * x];
    break;
#endif
  }
  if (bitmap->alpha) {
    pipe->destAlphaPtr = &bitmap->alpha[y * bitmap->width + x];
  } else {
    pipe->destAlphaPtr = NULL;
  }
  if (state->inNonIsolatedGroup && alpha0Bitmap->alpha) {
    pipe->alpha0Ptr =
        &alpha0Bitmap->alpha[(alpha0Y + y) * alpha0Bitmap->width +
			     (alpha0X + x)];
  } else {
    pipe->alpha0Ptr = NULL;
  }
}

inline void Splash::pipeIncX(SplashPipe *pipe) {
  ++pipe->x;
  if (state->softMask) {
    ++pipe->softMaskPtr;
  }
  switch (bitmap->mode) {
  case splashModeMono1:
    if (!(pipe->destColorMask >>= 1)) {
      pipe->destColorMask = 0x80;
      ++pipe->destColorPtr;
    }
    break;
  case splashModeMono8:
    ++pipe->destColorPtr;
    break;
  case splashModeRGB8:
  case splashModeBGR8:
    pipe->destColorPtr += 3;
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    pipe->destColorPtr += 4;
    break;
#endif
  }
  if (pipe->destAlphaPtr) {
    ++pipe->destAlphaPtr;
  }
  if (pipe->alpha0Ptr) {
    ++pipe->alpha0Ptr;
  }
}

inline void Splash::drawPixel(SplashPipe *pipe, int x, int y, GBool noClip) {
  if (noClip || state->clip->test(x, y)) {
    pipeSetXY(pipe, x, y);
    pipeRun(pipe);
    updateModX(x);
    updateModY(y);
  }
}

inline void Splash::drawAAPixelInit() {
  aaBufY = -1;
}

inline void Splash::drawAAPixel(SplashPipe *pipe, int x, int y) {
#if splashAASize == 4
  static int bitCount4[16] = { 0, 1, 1, 2, 1, 2, 2, 3,
			       1, 2, 2, 3, 2, 3, 3, 4 };
  int w;
#else
  int xx, yy;
#endif
  SplashColorPtr p;
  int x0, x1, t;

  if (x < 0 || x >= bitmap->width ||
      y < state->clip->getYMinI() || y > state->clip->getYMaxI()) {
    return;
  }

  // update aaBuf
  if (y != aaBufY) {
    memset(aaBuf->getDataPtr(), 0xff,
	   aaBuf->getRowSize() * aaBuf->getHeight());
    x0 = 0;
    x1 = bitmap->width - 1;
    state->clip->clipAALine(aaBuf, &x0, &x1, y);
    aaBufY = y;
  }

  // compute the shape value
#if splashAASize == 4
  p = aaBuf->getDataPtr() + (x >> 1);
  w = aaBuf->getRowSize();
  if (x & 1) {
    t = bitCount4[*p & 0x0f] + bitCount4[p[w] & 0x0f] +
        bitCount4[p[2*w] & 0x0f] + bitCount4[p[3*w] & 0x0f];
  } else {
    t = bitCount4[*p >> 4] + bitCount4[p[w] >> 4] +
        bitCount4[p[2*w] >> 4] + bitCount4[p[3*w] >> 4];
  }
#else
  t = 0;
  for (yy = 0; yy < splashAASize; ++yy) {
    for (xx = 0; xx < splashAASize; ++xx) {
      p = aaBuf->getDataPtr() + yy * aaBuf->getRowSize() +
	  ((x * splashAASize + xx) >> 3);
      t += (*p >> (7 - ((x * splashAASize + xx) & 7))) & 1;
    }
  }
#endif

  // draw the pixel
  if (t != 0) {
    pipeSetXY(pipe, x, y);
    pipe->shape *= aaGamma[t];
    pipeRun(pipe);
    updateModX(x);
    updateModY(y);
  }
}

inline void Splash::drawSpan(SplashPipe *pipe, int x0, int x1, int y,
			     GBool noClip) {
  int x;

  pipeSetXY(pipe, x0, y);
  if (noClip) {
    for (x = x0; x <= x1; ++x) {
      pipeRun(pipe);
    }
    updateModX(x0);
    updateModX(x1);
    updateModY(y);
  } else {
    for (x = x0; x <= x1; ++x) {
      if (state->clip->test(x, y)) {
	pipeRun(pipe);
	updateModX(x);
	updateModY(y);
      } else {
	pipeIncX(pipe);
      }
    }
  }
}

inline void Splash::drawAALine(SplashPipe *pipe, int x0, int x1, int y) {
#if splashAASize == 4
  static int bitCount4[16] = { 0, 1, 1, 2, 1, 2, 2, 3,
			       1, 2, 2, 3, 2, 3, 3, 4 };
  SplashColorPtr p0, p1, p2, p3;
  int t;
#else
  SplashColorPtr p;
  int xx, yy, t;
#endif
  int x;

#if splashAASize == 4
  p0 = aaBuf->getDataPtr() + (x0 >> 1);
  p1 = p0 + aaBuf->getRowSize();
  p2 = p1 + aaBuf->getRowSize();
  p3 = p2 + aaBuf->getRowSize();
#endif
  pipeSetXY(pipe, x0, y);
  for (x = x0; x <= x1; ++x) {

    // compute the shape value
#if splashAASize == 4
    if (x & 1) {
      t = bitCount4[*p0 & 0x0f] + bitCount4[*p1 & 0x0f] +
	  bitCount4[*p2 & 0x0f] + bitCount4[*p3 & 0x0f];
      ++p0; ++p1; ++p2; ++p3;
    } else {
      t = bitCount4[*p0 >> 4] + bitCount4[*p1 >> 4] +
	  bitCount4[*p2 >> 4] + bitCount4[*p3 >> 4];
    }
#else
    t = 0;
    for (yy = 0; yy < splashAASize; ++yy) {
      for (xx = 0; xx < splashAASize; ++xx) {
	p = aaBuf->getDataPtr() + yy * aaBuf->getRowSize() +
	    ((x * splashAASize + xx) >> 3);
	t += (*p >> (7 - ((x * splashAASize + xx) & 7))) & 1;
      }
    }
#endif

    if (t != 0) {
      pipe->shape = aaGamma[t];
      pipeRun(pipe);
      updateModX(x);
      updateModY(y);
    } else {
      pipeIncX(pipe);
    }
  }
}

//------------------------------------------------------------------------

// Transform a point from user space to device space.
inline void Splash::transform(SplashCoord *matrix,
			      SplashCoord xi, SplashCoord yi,
			      SplashCoord *xo, SplashCoord *yo) {
  //                          [ m[0] m[1] 0 ]
  // [xo yo 1] = [xi yi 1] *  [ m[2] m[3] 0 ]
  //                          [ m[4] m[5] 1 ]
  *xo = xi * matrix[0] + yi * matrix[2] + matrix[4];
  *yo = xi * matrix[1] + yi * matrix[3] + matrix[5];
}

//------------------------------------------------------------------------
// Splash
//------------------------------------------------------------------------

Splash::Splash(SplashBitmap *bitmapA, GBool vectorAntialiasA,
	       SplashScreenParams *screenParams) {
  int i;

  bitmap = bitmapA;
  vectorAntialias = vectorAntialiasA;
  state = new SplashState(bitmap->width, bitmap->height, vectorAntialias,
			  screenParams);
  if (vectorAntialias) {
    aaBuf = new SplashBitmap(splashAASize * bitmap->width, splashAASize,
			     1, splashModeMono1, gFalse);
    for (i = 0; i <= splashAASize * splashAASize; ++i) {
      aaGamma[i] = splashPow((SplashCoord)i /
			       (SplashCoord)(splashAASize * splashAASize),
			     1.5);
    }
  } else {
    aaBuf = NULL;
  }
  clearModRegion();
  debugMode = gFalse;
}

Splash::Splash(SplashBitmap *bitmapA, GBool vectorAntialiasA,
	       SplashScreen *screenA) {
  int i;

  bitmap = bitmapA;
  vectorAntialias = vectorAntialiasA;
  state = new SplashState(bitmap->width, bitmap->height, vectorAntialias,
			  screenA);
  if (vectorAntialias) {
    aaBuf = new SplashBitmap(splashAASize * bitmap->width, splashAASize,
			     1, splashModeMono1, gFalse);
    for (i = 0; i <= splashAASize * splashAASize; ++i) {
      aaGamma[i] = splashPow((SplashCoord)i /
			       (SplashCoord)(splashAASize * splashAASize),
			     1.5);
    }
  } else {
    aaBuf = NULL;
  }
  clearModRegion();
  debugMode = gFalse;
}

Splash::~Splash() {
  while (state->next) {
    restoreState();
  }
  delete state;
  if (vectorAntialias) {
    delete aaBuf;
  }
}

//------------------------------------------------------------------------
// state read
//------------------------------------------------------------------------

SplashCoord *Splash::getMatrix() {
  return state->matrix;
}

SplashPattern *Splash::getStrokePattern() {
  return state->strokePattern;
}

SplashPattern *Splash::getFillPattern() {
  return state->fillPattern;
}

SplashScreen *Splash::getScreen() {
  return state->screen;
}

SplashBlendFunc Splash::getBlendFunc() {
  return state->blendFunc;
}

SplashCoord Splash::getStrokeAlpha() {
  return state->strokeAlpha;
}

SplashCoord Splash::getFillAlpha() {
  return state->fillAlpha;
}

SplashCoord Splash::getLineWidth() {
  return state->lineWidth;
}

int Splash::getLineCap() {
  return state->lineCap;
}

int Splash::getLineJoin() {
  return state->lineJoin;
}

SplashCoord Splash::getMiterLimit() {
  return state->miterLimit;
}

SplashCoord Splash::getFlatness() {
  return state->flatness;
}

SplashCoord *Splash::getLineDash() {
  return state->lineDash;
}

int Splash::getLineDashLength() {
  return state->lineDashLength;
}

SplashCoord Splash::getLineDashPhase() {
  return state->lineDashPhase;
}

SplashClip *Splash::getClip() {
  return state->clip;
}

SplashBitmap *Splash::getSoftMask() {
  return state->softMask;
}

GBool Splash::getInNonIsolatedGroup() {
  return state->inNonIsolatedGroup;
}

//------------------------------------------------------------------------
// state write
//------------------------------------------------------------------------

void Splash::setMatrix(SplashCoord *matrix) {
  memcpy(state->matrix, matrix, 6 * sizeof(SplashCoord));
}

void Splash::setStrokePattern(SplashPattern *strokePattern) {
  state->setStrokePattern(strokePattern);
}

void Splash::setFillPattern(SplashPattern *fillPattern) {
  state->setFillPattern(fillPattern);
}

void Splash::setScreen(SplashScreen *screen) {
  state->setScreen(screen);
}

void Splash::setBlendFunc(SplashBlendFunc func) {
  state->blendFunc = func;
}

void Splash::setStrokeAlpha(SplashCoord alpha) {
  state->strokeAlpha = alpha;
}

void Splash::setFillAlpha(SplashCoord alpha) {
  state->fillAlpha = alpha;
}

void Splash::setLineWidth(SplashCoord lineWidth) {
  state->lineWidth = lineWidth;
}

void Splash::setLineCap(int lineCap) {
  state->lineCap = lineCap;
}

void Splash::setLineJoin(int lineJoin) {
  state->lineJoin = lineJoin;
}

void Splash::setMiterLimit(SplashCoord miterLimit) {
  state->miterLimit = miterLimit;
}

void Splash::setFlatness(SplashCoord flatness) {
  if (flatness < 1) {
    state->flatness = 1;
  } else {
    state->flatness = flatness;
  }
}

void Splash::setLineDash(SplashCoord *lineDash, int lineDashLength,
			 SplashCoord lineDashPhase) {
  state->setLineDash(lineDash, lineDashLength, lineDashPhase);
}

void Splash::setStrokeAdjust(GBool strokeAdjust) {
  state->strokeAdjust = strokeAdjust;
}

void Splash::clipResetToRect(SplashCoord x0, SplashCoord y0,
			     SplashCoord x1, SplashCoord y1) {
  state->clip->resetToRect(x0, y0, x1, y1);
}

SplashError Splash::clipToRect(SplashCoord x0, SplashCoord y0,
			       SplashCoord x1, SplashCoord y1) {
  return state->clip->clipToRect(x0, y0, x1, y1);
}

SplashError Splash::clipToPath(SplashPath *path, GBool eo) {
  return state->clip->clipToPath(path, state->matrix, state->flatness, eo);
}

void Splash::setSoftMask(SplashBitmap *softMask) {
  state->setSoftMask(softMask);
}

void Splash::setInNonIsolatedGroup(SplashBitmap *alpha0BitmapA,
				   int alpha0XA, int alpha0YA) {
  alpha0Bitmap = alpha0BitmapA;
  alpha0X = alpha0XA;
  alpha0Y = alpha0YA;
  state->inNonIsolatedGroup = gTrue;
}

//------------------------------------------------------------------------
// state save/restore
//------------------------------------------------------------------------

void Splash::saveState() {
  SplashState *newState;

  newState = state->copy();
  newState->next = state;
  state = newState;
}

SplashError Splash::restoreState() {
  SplashState *oldState;

  if (!state->next) {
    return splashErrNoSave;