438 lines
16 KiB
C
438 lines
16 KiB
C
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//========================================================================
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//
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// Splash.h
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//
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// Copyright 2003-2013 Glyph & Cog, LLC
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//
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//========================================================================
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#ifndef SPLASH_H
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#define SPLASH_H
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#include <aconf.h>
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#ifdef USE_GCC_PRAGMAS
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#pragma interface
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#endif
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#include "SplashTypes.h"
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#include "SplashClip.h"
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class Splash;
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class SplashBitmap;
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struct SplashGlyphBitmap;
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class SplashState;
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class SplashPattern;
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class SplashScreen;
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class SplashPath;
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class SplashXPath;
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class SplashFont;
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struct SplashPipe;
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//------------------------------------------------------------------------
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// Retrieves the next line of pixels in an image mask. Normally,
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// fills in *<line> and returns true. If the image stream is
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// exhausted, returns false.
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typedef GBool (*SplashImageMaskSource)(void *data, Guchar *pixel);
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// Retrieves the next line of pixels in an image. Normally, fills in
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// *<line> and returns true. If the image stream is exhausted,
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// returns false.
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typedef GBool (*SplashImageSource)(void *data, SplashColorPtr colorLine,
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Guchar *alphaLine);
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//------------------------------------------------------------------------
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enum SplashPipeResultColorCtrl {
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splashPipeResultColorNoAlphaBlendMono,
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splashPipeResultColorNoAlphaBlendRGB,
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#if SPLASH_CMYK
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splashPipeResultColorNoAlphaBlendCMYK,
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#endif
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splashPipeResultColorAlphaNoBlendMono,
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splashPipeResultColorAlphaNoBlendRGB,
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#if SPLASH_CMYK
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splashPipeResultColorAlphaNoBlendCMYK,
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#endif
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splashPipeResultColorAlphaBlendMono,
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splashPipeResultColorAlphaBlendRGB
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#if SPLASH_CMYK
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,
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splashPipeResultColorAlphaBlendCMYK
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#endif
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};
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//------------------------------------------------------------------------
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// Splash
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//------------------------------------------------------------------------
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class Splash {
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public:
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// Create a new rasterizer object.
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Splash(SplashBitmap *bitmapA, GBool vectorAntialiasA,
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SplashScreenParams *screenParams = NULL);
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Splash(SplashBitmap *bitmapA, GBool vectorAntialiasA,
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SplashScreen *screenA);
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~Splash();
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//----- state read
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SplashCoord *getMatrix();
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SplashPattern *getStrokePattern();
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SplashPattern *getFillPattern();
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SplashScreen *getScreen();
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SplashBlendFunc getBlendFunc();
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SplashCoord getStrokeAlpha();
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SplashCoord getFillAlpha();
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SplashCoord getLineWidth();
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int getLineCap();
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int getLineJoin();
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SplashCoord getMiterLimit();
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SplashCoord getFlatness();
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SplashCoord *getLineDash();
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int getLineDashLength();
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SplashCoord getLineDashPhase();
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SplashStrokeAdjustMode getStrokeAdjust();
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SplashClip *getClip();
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SplashBitmap *getSoftMask();
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GBool getInNonIsolatedGroup();
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GBool getInKnockoutGroup();
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//----- state write
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void setMatrix(SplashCoord *matrix);
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void setStrokePattern(SplashPattern *strokeColor);
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void setFillPattern(SplashPattern *fillColor);
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void setScreen(SplashScreen *screen);
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void setBlendFunc(SplashBlendFunc func);
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void setStrokeAlpha(SplashCoord alpha);
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void setFillAlpha(SplashCoord alpha);
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void setLineWidth(SplashCoord lineWidth);
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void setLineCap(int lineCap);
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void setLineJoin(int lineJoin);
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void setMiterLimit(SplashCoord miterLimit);
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void setFlatness(SplashCoord flatness);
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// the <lineDash> array will be copied
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void setLineDash(SplashCoord *lineDash, int lineDashLength,
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SplashCoord lineDashPhase);
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void setStrokeAdjust(SplashStrokeAdjustMode strokeAdjust);
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// NB: uses transformed coordinates.
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void clipResetToRect(SplashCoord x0, SplashCoord y0,
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SplashCoord x1, SplashCoord y1);
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// NB: uses transformed coordinates.
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SplashError clipToRect(SplashCoord x0, SplashCoord y0,
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SplashCoord x1, SplashCoord y1);
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// NB: uses untransformed coordinates.
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SplashError clipToPath(SplashPath *path, GBool eo);
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void setSoftMask(SplashBitmap *softMask);
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void setInTransparencyGroup(SplashBitmap *groupBackBitmapA,
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int groupBackXA, int groupBackYA,
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GBool nonIsolated, GBool knockout);
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void setTransfer(Guchar *red, Guchar *green, Guchar *blue, Guchar *gray);
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void setOverprintMask(Guint overprintMask);
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void setEnablePathSimplification(GBool en);
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//----- state save/restore
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void saveState();
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SplashError restoreState();
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//----- drawing operations
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// Fill the bitmap with <color>. This is not subject to clipping.
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void clear(SplashColorPtr color, Guchar alpha = 0x00);
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// Stroke a path using the current stroke pattern.
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SplashError stroke(SplashPath *path);
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// Fill a path using the current fill pattern.
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SplashError fill(SplashPath *path, GBool eo);
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// Draw a character, using the current fill pattern.
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SplashError fillChar(SplashCoord x, SplashCoord y, int c, SplashFont *font);
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// Draw a glyph, using the current fill pattern. This function does
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// not free any data, i.e., it ignores glyph->freeData.
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SplashError fillGlyph(SplashCoord x, SplashCoord y,
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SplashGlyphBitmap *glyph);
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// Draws an image mask using the fill color. This will read <h>
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// lines of <w> pixels from <src>, starting with the top line. "1"
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// pixels will be drawn with the current fill color; "0" pixels are
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// transparent. The matrix:
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// [ mat[0] mat[1] 0 ]
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// [ mat[2] mat[3] 0 ]
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// [ mat[4] mat[5] 1 ]
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// maps a unit square to the desired destination for the image, in
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// PostScript style:
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// [x' y' 1] = [x y 1] * mat
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// Note that the Splash y axis points downward, and the image source
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// is assumed to produce pixels in raster order, starting from the
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// top line.
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SplashError fillImageMask(SplashImageMaskSource src, void *srcData,
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int w, int h, SplashCoord *mat,
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GBool glyphMode, GBool interpolate);
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// Draw an image. This will read <h> lines of <w> pixels from
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// <src>, starting with the top line. These pixels are assumed to
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// be in the source mode, <srcMode>. If <srcAlpha> is true, the
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// alpha values returned by <src> are used; otherwise they are
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// ignored. The following combinations of source and target modes
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// are supported:
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// source target
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// ------ ------
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// Mono8 Mono1 -- with dithering
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// Mono8 Mono8
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// RGB8 RGB8
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// BGR8 RGB8
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// CMYK8 CMYK8
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// The matrix behaves as for fillImageMask.
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SplashError drawImage(SplashImageSource src, void *srcData,
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SplashColorMode srcMode, GBool srcAlpha,
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int w, int h, SplashCoord *mat,
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GBool interpolate);
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// Composite a rectangular region from <src> onto this Splash
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// object.
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SplashError composite(SplashBitmap *src, int xSrc, int ySrc,
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int xDest, int yDest, int w, int h,
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GBool noClip, GBool nonIsolated);
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// Composite this Splash object onto a background color. The
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// background alpha is assumed to be 1.
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void compositeBackground(SplashColorPtr color);
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// Copy a rectangular region from <src> onto the bitmap belonging to
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// this Splash object. The destination alpha values are all set to
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// zero.
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SplashError blitTransparent(SplashBitmap *src, int xSrc, int ySrc,
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int xDest, int yDest, int w, int h);
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// Copy a rectangular region from the bitmap belonging to this
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// Splash object to <dest>. The alpha values are corrected for a
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// non-isolated group.
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SplashError blitCorrectedAlpha(SplashBitmap *dest, int xSrc, int ySrc,
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int xDest, int yDest, int w, int h);
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//----- misc
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// Construct a path for a stroke, given the path to be stroked and
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// the line width <w>. All other stroke parameters are taken from
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// the current state. If <flatten> is true, this function will
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// first flatten the path and handle the linedash.
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SplashPath *makeStrokePath(SplashPath *path, SplashCoord w,
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int lineCap, int lineJoin,
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GBool flatten = gTrue);
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// Reduce the size of a rectangle as much as possible by moving any
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// edges that are completely outside the clip region. Returns the
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// clipping status of the resulting rectangle.
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SplashClipResult limitRectToClipRect(int *xMin, int *yMin,
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int *xMax, int *yMax);
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// Return the associated bitmap.
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SplashBitmap *getBitmap() { return bitmap; }
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// Set the minimum line width.
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void setMinLineWidth(SplashCoord w) { minLineWidth = w; }
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// Get a bounding box which includes all modifications since the
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// last call to clearModRegion.
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void getModRegion(int *xMin, int *yMin, int *xMax, int *yMax)
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{ *xMin = modXMin; *yMin = modYMin; *xMax = modXMax; *yMax = modYMax; }
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// Clear the modified region bounding box.
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void clearModRegion();
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// Get clipping status for the last drawing operation subject to
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// clipping.
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SplashClipResult getClipRes() { return opClipRes; }
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// Toggle debug mode on or off.
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void setDebugMode(GBool debugModeA) { debugMode = debugModeA; }
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#if 1 //~tmp: turn off anti-aliasing temporarily
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void setInShading(GBool sh) { inShading = sh; }
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#endif
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private:
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void pipeInit(SplashPipe *pipe, SplashPattern *pattern,
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Guchar aInput, GBool usesShape,
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GBool nonIsolatedGroup);
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void pipeRun(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunSimpleMono1(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunSimpleMono8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunSimpleRGB8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunSimpleBGR8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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#if SPLASH_CMYK
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void pipeRunSimpleCMYK8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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#endif
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void pipeRunShapeMono1(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunShapeMono8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunShapeRGB8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunShapeBGR8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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#if SPLASH_CMYK
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void pipeRunShapeCMYK8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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#endif
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void pipeRunAAMono1(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunAAMono8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunAARGB8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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void pipeRunAABGR8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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#if SPLASH_CMYK
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void pipeRunAACMYK8(SplashPipe *pipe, int x0, int x1, int y,
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Guchar *shapePtr, SplashColorPtr cSrcPtr);
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#endif
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void transform(SplashCoord *matrix, SplashCoord xi, SplashCoord yi,
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SplashCoord *xo, SplashCoord *yo);
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void updateModX(int x);
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void updateModY(int y);
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void strokeNarrow(SplashPath *path);
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void drawStrokeSpan(SplashPipe *pipe, int x0, int x1, int y, GBool noClip);
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void strokeWide(SplashPath *path, SplashCoord w,
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int lineCap, int lineJoin);
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SplashPath *flattenPath(SplashPath *path, SplashCoord *matrix,
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SplashCoord flatness);
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void flattenCurve(SplashCoord x0, SplashCoord y0,
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SplashCoord x1, SplashCoord y1,
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SplashCoord x2, SplashCoord y2,
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SplashCoord x3, SplashCoord y3,
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SplashCoord *matrix, SplashCoord flatness2,
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SplashPath *fPath);
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SplashPath *makeDashedPath(SplashPath *xPath);
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SplashError fillWithPattern(SplashPath *path, GBool eo,
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SplashPattern *pattern, SplashCoord alpha);
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SplashPath *tweakFillPath(SplashPath *path);
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GBool pathAllOutside(SplashPath *path);
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SplashError fillGlyph2(int x0, int y0, SplashGlyphBitmap *glyph);
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void getImageBounds(SplashCoord xyMin, SplashCoord xyMax,
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int *xyMinI, int *xyMaxI);
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void upscaleMask(SplashImageMaskSource src, void *srcData,
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int srcWidth, int srcHeight,
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SplashCoord *mat, GBool glyphMode,
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GBool interpolate);
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void arbitraryTransformMask(SplashImageMaskSource src, void *srcData,
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int srcWidth, int srcHeight,
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SplashCoord *mat, GBool glyphMode,
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GBool interpolate);
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SplashBitmap *scaleMask(SplashImageMaskSource src, void *srcData,
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int srcWidth, int srcHeight,
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int scaledWidth, int scaledHeight,
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GBool interpolate);
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void scaleMaskYdXd(SplashImageMaskSource src, void *srcData,
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int srcWidth, int srcHeight,
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int scaledWidth, int scaledHeight,
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||
|
|
SplashBitmap *dest);
|
||
|
|
void scaleMaskYdXu(SplashImageMaskSource src, void *srcData,
|
||
|
|
int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
SplashBitmap *dest);
|
||
|
|
void scaleMaskYuXd(SplashImageMaskSource src, void *srcData,
|
||
|
|
int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
SplashBitmap *dest);
|
||
|
|
void scaleMaskYuXu(SplashImageMaskSource src, void *srcData,
|
||
|
|
int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
SplashBitmap *dest);
|
||
|
|
void scaleMaskYuXuI(SplashImageMaskSource src, void *srcData,
|
||
|
|
int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
SplashBitmap *dest);
|
||
|
|
void blitMask(SplashBitmap *src, int xDest, int yDest,
|
||
|
|
SplashClipResult clipRes);
|
||
|
|
void upscaleImage(SplashImageSource src, void *srcData,
|
||
|
|
SplashColorMode srcMode, int nComps,
|
||
|
|
GBool srcAlpha, int srcWidth, int srcHeight,
|
||
|
|
SplashCoord *mat, GBool interpolate);
|
||
|
|
void arbitraryTransformImage(SplashImageSource src, void *srcData,
|
||
|
|
SplashColorMode srcMode, int nComps,
|
||
|
|
GBool srcAlpha,
|
||
|
|
int srcWidth, int srcHeight,
|
||
|
|
SplashCoord *mat, GBool interpolate);
|
||
|
|
SplashBitmap *scaleImage(SplashImageSource src, void *srcData,
|
||
|
|
SplashColorMode srcMode, int nComps,
|
||
|
|
GBool srcAlpha, int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
GBool interpolate);
|
||
|
|
void scaleImageYdXd(SplashImageSource src, void *srcData,
|
||
|
|
SplashColorMode srcMode, int nComps,
|
||
|
|
GBool srcAlpha, int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
SplashBitmap *dest);
|
||
|
|
void scaleImageYdXu(SplashImageSource src, void *srcData,
|
||
|
|
SplashColorMode srcMode, int nComps,
|
||
|
|
GBool srcAlpha, int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
SplashBitmap *dest);
|
||
|
|
void scaleImageYuXd(SplashImageSource src, void *srcData,
|
||
|
|
SplashColorMode srcMode, int nComps,
|
||
|
|
GBool srcAlpha, int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
SplashBitmap *dest);
|
||
|
|
void scaleImageYuXu(SplashImageSource src, void *srcData,
|
||
|
|
SplashColorMode srcMode, int nComps,
|
||
|
|
GBool srcAlpha, int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
SplashBitmap *dest);
|
||
|
|
void scaleImageYuXuI(SplashImageSource src, void *srcData,
|
||
|
|
SplashColorMode srcMode, int nComps,
|
||
|
|
GBool srcAlpha, int srcWidth, int srcHeight,
|
||
|
|
int scaledWidth, int scaledHeight,
|
||
|
|
SplashBitmap *dest);
|
||
|
|
void vertFlipImage(SplashBitmap *img, int width, int height,
|
||
|
|
int nComps);
|
||
|
|
void horizFlipImage(SplashBitmap *img, int width, int height,
|
||
|
|
int nComps);
|
||
|
|
void blitImage(SplashBitmap *src, GBool srcAlpha, int xDest, int yDest,
|
||
|
|
SplashClipResult clipRes);
|
||
|
|
void blitImageClipped(SplashBitmap *src, GBool srcAlpha,
|
||
|
|
int xSrc, int ySrc, int xDest, int yDest,
|
||
|
|
int w, int h);
|
||
|
|
void dumpPath(SplashPath *path);
|
||
|
|
void dumpXPath(SplashXPath *path);
|
||
|
|
|
||
|
|
|
||
|
|
static SplashPipeResultColorCtrl pipeResultColorNoAlphaBlend[];
|
||
|
|
static SplashPipeResultColorCtrl pipeResultColorAlphaNoBlend[];
|
||
|
|
static SplashPipeResultColorCtrl pipeResultColorAlphaBlend[];
|
||
|
|
static int pipeNonIsoGroupCorrection[];
|
||
|
|
|
||
|
|
SplashBitmap *bitmap;
|
||
|
|
int bitmapComps;
|
||
|
|
SplashState *state;
|
||
|
|
Guchar *scanBuf;
|
||
|
|
Guchar *scanBuf2;
|
||
|
|
SplashBitmap // for transparency groups, this is the bitmap
|
||
|
|
*groupBackBitmap; // containing the alpha0/color0 values
|
||
|
|
int groupBackX, groupBackY; // offset within groupBackBitmap
|
||
|
|
SplashCoord minLineWidth;
|
||
|
|
int modXMin, modYMin, modXMax, modYMax;
|
||
|
|
SplashClipResult opClipRes;
|
||
|
|
GBool vectorAntialias;
|
||
|
|
GBool inShading;
|
||
|
|
GBool debugMode;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|