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GNU GENERAL PUBLIC LICENSE
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the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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pdf2htmlEX/3rdparty/poppler/git/CairoFontEngine.cc vendored
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@ -1,856 +0,0 @@
//========================================================================
//
// CairoFontEngine.cc
//
// Copyright 2003 Glyph & Cog, LLC
// Copyright 2004 Red Hat, Inc
//
//========================================================================
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2005-2007 Jeff Muizelaar <jeff@infidigm.net>
// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
// Copyright (C) 2005 Martin Kretzschmar <martink@gnome.org>
// Copyright (C) 2005, 2009, 2012, 2013, 2015, 2017-2019 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2006, 2007, 2010, 2011 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2007 Koji Otani <sho@bbr.jp>
// Copyright (C) 2008, 2009 Chris Wilson <chris@chris-wilson.co.uk>
// Copyright (C) 2008, 2012, 2014, 2016, 2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2009 Darren Kenny <darren.kenny@sun.com>
// Copyright (C) 2010 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp>
// Copyright (C) 2010 Jan Kümmel <jan+freedesktop@snorc.org>
// Copyright (C) 2012 Hib Eris <hib@hiberis.nl>
// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2015, 2016 Jason Crain <jason@aquaticape.us>
// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
// Copyright (C) 2019 Christian Persch <chpe@src.gnome.org>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
#include <poppler-config.h>
#include <string.h>
#include "CairoFontEngine.h"
#include "CairoOutputDev.h"
#include "GlobalParams.h"
#include <fofi/FoFiTrueType.h>
#include <fofi/FoFiType1C.h>
#include "goo/gfile.h"
#include "Error.h"
#include "XRef.h"
#include "Gfx.h"
#include "Page.h"
#if defined(HAVE_FCNTL_H) && defined(HAVE_SYS_MMAN_H) && defined(HAVE_SYS_STAT_H)
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#define CAN_CHECK_OPEN_FACES 1
#endif
//------------------------------------------------------------------------
// CairoFont
//------------------------------------------------------------------------
CairoFont::CairoFont(Ref refA,
cairo_font_face_t *cairo_font_faceA,
int *codeToGIDA,
unsigned int codeToGIDLenA,
bool substituteA,
bool printingA) : ref(refA),
cairo_font_face(cairo_font_faceA),
codeToGID(codeToGIDA),
codeToGIDLen(codeToGIDLenA),
substitute(substituteA),
printing(printingA) { }
CairoFont::~CairoFont() {
cairo_font_face_destroy (cairo_font_face);
gfree(codeToGID);
}
bool
CairoFont::matches(Ref &other, bool printingA) {
return (other == ref);
}
cairo_font_face_t *
CairoFont::getFontFace(void) {
return cairo_font_face;
}
unsigned long
CairoFont::getGlyph(CharCode code,
const Unicode *u, int uLen) {
FT_UInt gid;
if (codeToGID && code < codeToGIDLen) {
gid = (FT_UInt)codeToGID[code];
} else {
gid = (FT_UInt)code;
}
return gid;
}
double
CairoFont::getSubstitutionCorrection(GfxFont *gfxFont)
{
double w1, w2, w3;
CharCode code;
const char *name;
// for substituted fonts: adjust the font matrix -- compare the
// width of 'm' in the original font and the substituted font
if (isSubstitute() && !gfxFont->isCIDFont()) {
for (code = 0; code < 256; ++code) {
if ((name = ((Gfx8BitFont *)gfxFont)->getCharName(code)) &&
name[0] == 'm' && name[1] == '\0') {
break;
}
}
if (code < 256) {
w1 = ((Gfx8BitFont *)gfxFont)->getWidth(code);
{
cairo_matrix_t m;
cairo_matrix_init_identity(&m);
cairo_font_options_t *options = cairo_font_options_create();
cairo_font_options_set_hint_style(options, CAIRO_HINT_STYLE_NONE);
cairo_font_options_set_hint_metrics(options, CAIRO_HINT_METRICS_OFF);
cairo_scaled_font_t *scaled_font = cairo_scaled_font_create(cairo_font_face, &m, &m, options);
cairo_text_extents_t extents;
cairo_scaled_font_text_extents(scaled_font, "m", &extents);
cairo_scaled_font_destroy(scaled_font);
cairo_font_options_destroy(options);
w2 = extents.x_advance;
}
w3 = ((Gfx8BitFont *)gfxFont)->getWidth(0);
if (!gfxFont->isSymbolic() && w2 > 0 && w1 > w3) {
// if real font is substantially narrower than substituted
// font, reduce the font size accordingly
if (w1 > 0.01 && w1 < 0.9 * w2) {
w1 /= w2;
return w1;
}
}
}
}
return 1.0;
}
//------------------------------------------------------------------------
// CairoFreeTypeFont
//------------------------------------------------------------------------
static cairo_user_data_key_t _ft_cairo_key;
static void
_ft_done_face_uncached (void *closure)
{
FT_Face face = (FT_Face) closure;
FT_Done_Face (face);
}
static bool
_ft_new_face_uncached (FT_Library lib,
const char *filename,
char *font_data,
int font_data_len,
FT_Face *face_out,
cairo_font_face_t **font_face_out)
{
FT_Face face;
cairo_font_face_t *font_face;
if (font_data == nullptr) {
if (FT_New_Face (lib, filename, 0, &face))
return false;
} else {
if (FT_New_Memory_Face (lib, (unsigned char *)font_data, font_data_len, 0, &face))
return false;
}
font_face = cairo_ft_font_face_create_for_ft_face (face,
FT_LOAD_NO_HINTING |
FT_LOAD_NO_BITMAP);
if (cairo_font_face_set_user_data (font_face,
&_ft_cairo_key,
face,
_ft_done_face_uncached))
{
_ft_done_face_uncached (face);
cairo_font_face_destroy (font_face);
return false;
}
*face_out = face;
*font_face_out = font_face;
return true;
}
#ifdef CAN_CHECK_OPEN_FACES
static struct _ft_face_data {
struct _ft_face_data *prev, *next, **head;
int fd;
unsigned long hash;
size_t size;
unsigned char *bytes;
FT_Library lib;
FT_Face face;
cairo_font_face_t *font_face;
} *_ft_open_faces;
static unsigned long
_djb_hash (const unsigned char *bytes, size_t len)
{
unsigned long hash = 5381;
while (len--) {
unsigned char c = *bytes++;
hash *= 33;
hash ^= c;
}
return hash;
}
static bool
_ft_face_data_equal (struct _ft_face_data *a, struct _ft_face_data *b)
{
if (a->lib != b->lib)
return false;
if (a->size != b->size)
return false;
if (a->hash != b->hash)
return false;
return memcmp (a->bytes, b->bytes, a->size) == 0;
}
static void
_ft_done_face (void *closure)
{
struct _ft_face_data *data = (struct _ft_face_data *) closure;
if (data->next)
data->next->prev = data->prev;
if (data->prev)
data->prev->next = data->next;
else
_ft_open_faces = data->next;
if (data->fd != -1) {
#if defined(__SUNPRO_CC) && defined(__sun) && defined(__SVR4)
munmap ((char*)data->bytes, data->size);
#else
munmap (data->bytes, data->size);
#endif
close (data->fd);
} else {
gfree (data->bytes);
}
FT_Done_Face (data->face);
gfree (data);
}
static bool
_ft_new_face (FT_Library lib,
const char *filename,
char *font_data,
int font_data_len,
FT_Face *face_out,
cairo_font_face_t **font_face_out)
{
struct _ft_face_data *l;
struct stat st;
struct _ft_face_data tmpl;
tmpl.fd = -1;
if (font_data == nullptr) {
/* if we fail to mmap the file, just pass it to FreeType instead */
tmpl.fd = openFileDescriptor (filename, O_RDONLY);
if (tmpl.fd == -1)
return _ft_new_face_uncached (lib, filename, font_data, font_data_len, face_out, font_face_out);
if (fstat (tmpl.fd, &st) == -1) {
close (tmpl.fd);
return _ft_new_face_uncached (lib, filename, font_data, font_data_len, face_out, font_face_out);
}
tmpl.bytes = (unsigned char *) mmap (nullptr, st.st_size,
PROT_READ, MAP_PRIVATE,
tmpl.fd, 0);
if (tmpl.bytes == MAP_FAILED) {
close (tmpl.fd);
return _ft_new_face_uncached (lib, filename, font_data, font_data_len, face_out, font_face_out);
}
tmpl.size = st.st_size;
} else {
tmpl.bytes = (unsigned char*) font_data;
tmpl.size = font_data_len;
}
/* check to see if this is a duplicate of any of the currently open fonts */
tmpl.lib = lib;
tmpl.hash = _djb_hash (tmpl.bytes, tmpl.size);
for (l = _ft_open_faces; l; l = l->next) {
if (_ft_face_data_equal (l, &tmpl)) {
if (tmpl.fd != -1) {
#if defined(__SUNPRO_CC) && defined(__sun) && defined(__SVR4)
munmap ((char*)tmpl.bytes, tmpl.size);
#else
munmap (tmpl.bytes, tmpl.size);
#endif
close (tmpl.fd);
} else {
gfree (tmpl.bytes);
}
*face_out = l->face;
*font_face_out = cairo_font_face_reference (l->font_face);
return true;
}
}
/* not a dup, open and insert into list */
if (FT_New_Memory_Face (lib,
(FT_Byte *) tmpl.bytes, tmpl.size,
0, &tmpl.face))
{
if (tmpl.fd != -1) {
#if defined(__SUNPRO_CC) && defined(__sun) && defined(__SVR4)
munmap ((char*)tmpl.bytes, tmpl.size);
#else
munmap (tmpl.bytes, tmpl.size);
#endif
close (tmpl.fd);
}
return false;
}
l = (struct _ft_face_data *) gmallocn (1, sizeof (struct _ft_face_data));
*l = tmpl;
l->prev = nullptr;
l->next = _ft_open_faces;
if (_ft_open_faces)
_ft_open_faces->prev = l;
_ft_open_faces = l;
l->font_face = cairo_ft_font_face_create_for_ft_face (tmpl.face,
FT_LOAD_NO_HINTING |
FT_LOAD_NO_BITMAP);
if (cairo_font_face_set_user_data (l->font_face,
&_ft_cairo_key,
l,
_ft_done_face))
{
cairo_font_face_destroy (l->font_face);
_ft_done_face (l);
return false;
}
*face_out = l->face;
*font_face_out = l->font_face;
return true;
}
#else
#define _ft_new_face _ft_new_face_uncached
#endif
CairoFreeTypeFont::CairoFreeTypeFont(Ref refA,
cairo_font_face_t *cairo_font_faceA,
int *codeToGIDA,
unsigned int codeToGIDLenA,
bool substituteA) : CairoFont(refA,
cairo_font_faceA,
codeToGIDA,
codeToGIDLenA,
substituteA,
true) { }
CairoFreeTypeFont::~CairoFreeTypeFont() { }
CairoFreeTypeFont *CairoFreeTypeFont::create(GfxFont *gfxFont, XRef *xref,
FT_Library lib, bool useCIDs) {
GooString *fileName;
const char *fileNameC;
char *font_data;
int font_data_len;
int i, n;
GfxFontType fontType;
GfxFontLoc *fontLoc;
char **enc;
const char *name;
FoFiTrueType *ff;
FoFiType1C *ff1c;
Ref ref;
FT_Face face;
cairo_font_face_t *font_face;
int *codeToGID;
unsigned int codeToGIDLen;
codeToGID = nullptr;
codeToGIDLen = 0;
font_data = nullptr;
font_data_len = 0;
fileName = nullptr;
fileNameC = nullptr;
bool substitute = false;
ref = *gfxFont->getID();
fontType = gfxFont->getType();
if (!(fontLoc = gfxFont->locateFont(xref, nullptr))) {
error(errSyntaxError, -1, "Couldn't find a font for '{0:s}'",
gfxFont->getName() ? gfxFont->getName()->c_str()
: "(unnamed)");
goto err2;
}
// embedded font
if (fontLoc->locType == gfxFontLocEmbedded) {
font_data = gfxFont->readEmbFontFile(xref, &font_data_len);
if (nullptr == font_data)
goto err2;
// external font
} else { // gfxFontLocExternal
fileName = fontLoc->path;
fontType = fontLoc->fontType;
substitute = true;
}
if (fileName != nullptr) {
fileNameC = fileName->c_str();
}
switch (fontType) {
case fontType1:
case fontType1C:
case fontType1COT:
if (! _ft_new_face (lib, fileNameC, font_data, font_data_len, &face, &font_face)) {
error(errSyntaxError, -1, "could not create type1 face");
goto err2;
}
enc = ((Gfx8BitFont *)gfxFont)->getEncoding();
codeToGID = (int *)gmallocn(256, sizeof(int));
codeToGIDLen = 256;
for (i = 0; i < 256; ++i) {
codeToGID[i] = 0;
if ((name = enc[i])) {
codeToGID[i] = FT_Get_Name_Index(face, (char*)name);
if (codeToGID[i] == 0) {
Unicode u;
u = globalParams->mapNameToUnicodeText (name);
codeToGID[i] = FT_Get_Char_Index (face, u);
}
if (codeToGID[i] == 0) {
name = GfxFont::getAlternateName(name);
if (name) {
codeToGID[i] = FT_Get_Name_Index(face, (char*)name);
}
}
}
}
break;
case fontCIDType2:
case fontCIDType2OT:
codeToGID = nullptr;
n = 0;
if (((GfxCIDFont *)gfxFont)->getCIDToGID()) {
n = ((GfxCIDFont *)gfxFont)->getCIDToGIDLen();
if (n) {
codeToGID = (int *)gmallocn(n, sizeof(int));
memcpy(codeToGID, ((GfxCIDFont *)gfxFont)->getCIDToGID(),
n * sizeof(int));
}
} else {
if (font_data != nullptr) {
ff = FoFiTrueType::make(font_data, font_data_len);
} else {
ff = FoFiTrueType::load(fileNameC);
}
if (! ff)
goto err2;
codeToGID = ((GfxCIDFont *)gfxFont)->getCodeToGIDMap(ff, &n);
delete ff;
}
codeToGIDLen = n;
/* Fall through */
case fontTrueType:
case fontTrueTypeOT:
if (font_data != nullptr) {
ff = FoFiTrueType::make(font_data, font_data_len);
} else {
ff = FoFiTrueType::load(fileNameC);
}
if (! ff) {
error(errSyntaxError, -1, "failed to load truetype font\n");
goto err2;
}
/* This might be set already for the CIDType2 case */
if (fontType == fontTrueType || fontType == fontTrueTypeOT) {
codeToGID = ((Gfx8BitFont *)gfxFont)->getCodeToGIDMap(ff);
codeToGIDLen = 256;
}
delete ff;
if (! _ft_new_face (lib, fileNameC, font_data, font_data_len, &face, &font_face)) {
error(errSyntaxError, -1, "could not create truetype face\n");
goto err2;
}
break;
case fontCIDType0:
case fontCIDType0C:
codeToGID = nullptr;
codeToGIDLen = 0;
if (!useCIDs)
{
if (font_data != nullptr) {
ff1c = FoFiType1C::make(font_data, font_data_len);
} else {
ff1c = FoFiType1C::load(fileNameC);
}
if (ff1c) {
codeToGID = ff1c->getCIDToGIDMap((int *)&codeToGIDLen);
delete ff1c;
}
}
if (! _ft_new_face (lib, fileNameC, font_data, font_data_len, &face, &font_face)) {
error(errSyntaxError, -1, "could not create cid face\n");
goto err2;
}
break;
case fontCIDType0COT:
codeToGID = nullptr;
n = 0;
if (((GfxCIDFont *)gfxFont)->getCIDToGID()) {
n = ((GfxCIDFont *)gfxFont)->getCIDToGIDLen();
if (n) {
codeToGID = (int *)gmallocn(n, sizeof(int));
memcpy(codeToGID, ((GfxCIDFont *)gfxFont)->getCIDToGID(),
n * sizeof(int));
}
}
codeToGIDLen = n;
if (!codeToGID) {
if (!useCIDs) {
if (font_data != nullptr) {
ff = FoFiTrueType::make(font_data, font_data_len);
} else {
ff = FoFiTrueType::load(fileNameC);
}
if (ff) {
if (ff->isOpenTypeCFF()) {
codeToGID = ff->getCIDToGIDMap((int *)&codeToGIDLen);
}
delete ff;
}
}
}
if (! _ft_new_face (lib, fileNameC, font_data, font_data_len, &face, &font_face)) {
error(errSyntaxError, -1, "could not create cid (OT) face\n");
goto err2;
}
break;
default:
fprintf (stderr, "font type %d not handled\n", (int)fontType);
goto err2;
break;
}
delete fontLoc;
return new CairoFreeTypeFont(ref,
font_face,
codeToGID, codeToGIDLen,
substitute);
err2:
/* hmm? */
delete fontLoc;
gfree (codeToGID);
gfree (font_data);
fprintf (stderr, "some font thing failed\n");
return nullptr;
}
//------------------------------------------------------------------------
// CairoType3Font
//------------------------------------------------------------------------
static const cairo_user_data_key_t type3_font_key = {0};
typedef struct _type3_font_info {
GfxFont *font;
PDFDoc *doc;
CairoFontEngine *fontEngine;
bool printing;
XRef *xref;
} type3_font_info_t;
static void
_free_type3_font_info(void *closure)
{
type3_font_info_t *info = (type3_font_info_t *) closure;
info->font->decRefCnt();
free (info);
}
static cairo_status_t
_init_type3_glyph (cairo_scaled_font_t *scaled_font,
cairo_t *cr,
cairo_font_extents_t *extents)
{
type3_font_info_t *info;
GfxFont *font;
info = (type3_font_info_t *)
cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
&type3_font_key);
font = info->font;
const double *mat = font->getFontBBox();
extents->ascent = mat[3]; /* y2 */
extents->descent = -mat[3]; /* -y1 */
extents->height = extents->ascent + extents->descent;
extents->max_x_advance = mat[2] - mat[1]; /* x2 - x1 */
extents->max_y_advance = 0;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_render_type3_glyph (cairo_scaled_font_t *scaled_font,
unsigned long glyph,
cairo_t *cr,
cairo_text_extents_t *metrics)
{
Dict *charProcs;
Object charProc;
CairoOutputDev *output_dev;
cairo_matrix_t matrix, invert_y_axis;
const double *mat;
double wx, wy;
PDFRectangle box;
type3_font_info_t *info;
GfxFont *font;
Dict *resDict;
Gfx *gfx;
info = (type3_font_info_t *)
cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
&type3_font_key);
font = info->font;
resDict = ((Gfx8BitFont *)font)->getResources();
charProcs = ((Gfx8BitFont *)(info->font))->getCharProcs();
if (!charProcs)
return CAIRO_STATUS_USER_FONT_ERROR;
if ((int)glyph >= charProcs->getLength())
return CAIRO_STATUS_USER_FONT_ERROR;
mat = font->getFontMatrix();
matrix.xx = mat[0];
matrix.yx = mat[1];
matrix.xy = mat[2];
matrix.yy = mat[3];
matrix.x0 = mat[4];
matrix.y0 = mat[5];
cairo_matrix_init_scale (&invert_y_axis, 1, -1);
cairo_matrix_multiply (&matrix, &matrix, &invert_y_axis);
cairo_transform (cr, &matrix);
output_dev = new CairoOutputDev();
output_dev->setCairo(cr);
output_dev->setPrinting(info->printing);
mat = font->getFontBBox();
box.x1 = mat[0];
box.y1 = mat[1];
box.x2 = mat[2];
box.y2 = mat[3];
gfx = new Gfx(info->doc, output_dev, resDict, &box, nullptr);
output_dev->startDoc(info->doc, info->fontEngine);
output_dev->startPage (1, gfx->getState(), gfx->getXRef());
output_dev->setInType3Char(true);
charProc = charProcs->getVal(glyph);
gfx->display(&charProc);
output_dev->getType3GlyphWidth (&wx, &wy);
cairo_matrix_transform_distance (&matrix, &wx, &wy);
metrics->x_advance = wx;
metrics->y_advance = wy;
if (output_dev->hasType3GlyphBBox()) {
double *bbox = output_dev->getType3GlyphBBox();
cairo_matrix_transform_point (&matrix, &bbox[0], &bbox[1]);
cairo_matrix_transform_point (&matrix, &bbox[2], &bbox[3]);
metrics->x_bearing = bbox[0];
metrics->y_bearing = bbox[1];
metrics->width = bbox[2] - bbox[0];
metrics->height = bbox[3] - bbox[1];
}
delete gfx;
delete output_dev;
return CAIRO_STATUS_SUCCESS;
}
CairoType3Font *CairoType3Font::create(GfxFont *gfxFont, PDFDoc *doc,
CairoFontEngine *fontEngine,
bool printing, XRef *xref) {
type3_font_info_t *info;
cairo_font_face_t *font_face;
Ref ref;
int *codeToGID;
unsigned int codeToGIDLen;
int i, j;
char **enc;
Dict *charProcs;
char *name;
charProcs = ((Gfx8BitFont *)gfxFont)->getCharProcs();
info = (type3_font_info_t *) malloc(sizeof(*info));
ref = *gfxFont->getID();
font_face = cairo_user_font_face_create();
cairo_user_font_face_set_init_func (font_face, _init_type3_glyph);
cairo_user_font_face_set_render_glyph_func (font_face, _render_type3_glyph);
gfxFont->incRefCnt();
info->font = gfxFont;
info->doc = doc;
info->fontEngine = fontEngine;
info->printing = printing;
info->xref = xref;
cairo_font_face_set_user_data (font_face, &type3_font_key, (void *) info, _free_type3_font_info);
enc = ((Gfx8BitFont *)gfxFont)->getEncoding();
codeToGID = (int *)gmallocn(256, sizeof(int));
codeToGIDLen = 256;
for (i = 0; i < 256; ++i) {
codeToGID[i] = 0;
if (charProcs && (name = enc[i])) {
for (j = 0; j < charProcs->getLength(); j++) {
if (strcmp(name, charProcs->getKey(j)) == 0) {
codeToGID[i] = j;
}
}
}
}
return new CairoType3Font(ref, font_face, codeToGID, codeToGIDLen, printing, xref);
}
CairoType3Font::CairoType3Font(Ref refA,
cairo_font_face_t *cairo_font_faceA,
int *codeToGIDA,
unsigned int codeToGIDLenA,
bool printingA, XRef *xref) : CairoFont(refA,
cairo_font_faceA,
codeToGIDA,
codeToGIDLenA,
false,
printingA)
{ }
CairoType3Font::~CairoType3Font() { }
bool
CairoType3Font::matches(Ref &other, bool printingA) {
return (other == ref && printing == printingA);
}
//------------------------------------------------------------------------
// CairoFontEngine
//------------------------------------------------------------------------
#define fontEngineLocker() std::unique_lock<std::recursive_mutex> locker(mutex)
CairoFontEngine::CairoFontEngine(FT_Library libA) {
int i;
lib = libA;
for (i = 0; i < cairoFontCacheSize; ++i) {
fontCache[i] = nullptr;
}
FT_Int major, minor, patch;
// as of FT 2.1.8, CID fonts are indexed by CID instead of GID
FT_Library_Version(lib, &major, &minor, &patch);
useCIDs = major > 2 ||
(major == 2 && (minor > 1 || (minor == 1 && patch > 7)));
}
CairoFontEngine::~CairoFontEngine() {
int i;
for (i = 0; i < cairoFontCacheSize; ++i) {
if (fontCache[i])
delete fontCache[i];
}
}
CairoFont *
CairoFontEngine::getFont(GfxFont *gfxFont, PDFDoc *doc, bool printing, XRef *xref) {
int i, j;
Ref ref;
CairoFont *font;
GfxFontType fontType;
fontEngineLocker();
ref = *gfxFont->getID();
for (i = 0; i < cairoFontCacheSize; ++i) {
font = fontCache[i];
if (font && font->matches(ref, printing)) {
for (j = i; j > 0; --j) {
fontCache[j] = fontCache[j-1];
}
fontCache[0] = font;
return font;
}
}
fontType = gfxFont->getType();
if (fontType == fontType3)
font = CairoType3Font::create (gfxFont, doc, this, printing, xref);
else
font = CairoFreeTypeFont::create (gfxFont, xref, lib, useCIDs);
//XXX: if font is null should we still insert it into the cache?
if (fontCache[cairoFontCacheSize - 1]) {
delete fontCache[cairoFontCacheSize - 1];
}
for (j = cairoFontCacheSize - 1; j > 0; --j) {
fontCache[j] = fontCache[j-1];
}
fontCache[0] = font;
return font;
}

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//========================================================================
//
// CairoFontEngine.h
//
// Copyright 2003 Glyph & Cog, LLC
// Copyright 2004 Red Hat, Inc
//
//========================================================================
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
// Copyright (C) 2005, 2018, 2019 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2006, 2007 Jeff Muizelaar <jeff@infidigm.net>
// Copyright (C) 2006, 2010 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2008, 2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
#ifndef CAIROFONTENGINE_H
#define CAIROFONTENGINE_H
#include <mutex>
#include "poppler-config.h"
#include <cairo-ft.h>
#include "GfxFont.h"
#include "PDFDoc.h"
class CairoFontEngine;
class CairoFont {
public:
CairoFont(Ref ref,
cairo_font_face_t *face,
int *codeToGID,
unsigned int codeToGIDLen,
bool substitute,
bool printing);
virtual ~CairoFont();
CairoFont(const CairoFont &) = delete;
CairoFont& operator=(const CairoFont &other) = delete;
virtual bool matches(Ref &other, bool printing);
cairo_font_face_t *getFontFace(void);
unsigned long getGlyph(CharCode code, const Unicode *u, int uLen);
double getSubstitutionCorrection(GfxFont *gfxFont);
bool isSubstitute() { return substitute; }
protected:
Ref ref;
cairo_font_face_t *cairo_font_face;
int *codeToGID;
unsigned int codeToGIDLen;
bool substitute;
bool printing;
};
//------------------------------------------------------------------------
class CairoFreeTypeFont : public CairoFont {
public:
static CairoFreeTypeFont *create(GfxFont *gfxFont, XRef *xref, FT_Library lib, bool useCIDs);
~CairoFreeTypeFont();
private:
CairoFreeTypeFont(Ref ref, cairo_font_face_t *cairo_font_face,
int *codeToGID, unsigned int codeToGIDLen, bool substitute);
};
//------------------------------------------------------------------------
class CairoType3Font : public CairoFont {
public:
static CairoType3Font *create(GfxFont *gfxFont, PDFDoc *doc,
CairoFontEngine *fontEngine,
bool printing, XRef *xref);
~CairoType3Font();
bool matches(Ref &other, bool printing) override;
private:
CairoType3Font(Ref ref,
cairo_font_face_t *cairo_font_face,
int *codeToGID, unsigned int codeToGIDLen,
bool printing, XRef *xref);
};
//------------------------------------------------------------------------
#define cairoFontCacheSize 64
//------------------------------------------------------------------------
// CairoFontEngine
//------------------------------------------------------------------------
class CairoFontEngine {
public:
// Create a font engine.
CairoFontEngine(FT_Library libA);
~CairoFontEngine();
CairoFontEngine(const CairoFontEngine &) = delete;
CairoFontEngine& operator=(const CairoFontEngine &other) = delete;
CairoFont *getFont(GfxFont *gfxFont, PDFDoc *doc, bool printing, XRef *xref);
private:
CairoFont *fontCache[cairoFontCacheSize];
FT_Library lib;
bool useCIDs;
mutable std::recursive_mutex mutex;
};
#endif

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//========================================================================
//
// CairoOutputDev.h
//
// Copyright 2003 Glyph & Cog, LLC
// Copyright 2004 Red Hat, INC
//
//========================================================================
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2005-2008 Jeff Muizelaar <jeff@infidigm.net>
// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
// Copyright (C) 2005 Nickolay V. Shmyrev <nshmyrev@yandex.ru>
// Copyright (C) 2006-2011, 2013 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2008, 2009, 2011-2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2008 Michael Vrable <mvrable@cs.ucsd.edu>
// Copyright (C) 2010-2013 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2015 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp>
// Copyright (C) 2016 Jason Crain <jason@aquaticape.us>
// Copyright (C) 2018, 2019 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by the LiMux project of the city of Munich
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
#ifndef CAIROOUTPUTDEV_H
#define CAIROOUTPUTDEV_H
#include <cairo-ft.h>
#include "OutputDev.h"
#include "TextOutputDev.h"
#include "GfxState.h"
class PDFDoc;
class GfxState;
class GfxPath;
class Gfx8BitFont;
struct GfxRGB;
class CairoFontEngine;
class CairoFont;
//------------------------------------------------------------------------
//------------------------------------------------------------------------
// CairoImage
//------------------------------------------------------------------------
class CairoImage {
public:
// Constructor.
CairoImage (double x1, double y1, double x2, double y2);
// Destructor.
~CairoImage ();
CairoImage(const CairoImage &) = delete;
CairoImage& operator=(const CairoImage &) = delete;
// Set the image cairo surface
void setImage (cairo_surface_t *image);
// Get the image cairo surface
cairo_surface_t *getImage () const { return image; }
// Get the image rectangle
void getRect (double *xa1, double *ya1, double *xa2, double *ya2)
{ *xa1 = x1; *ya1 = y1; *xa2 = x2; *ya2 = y2; }
private:
cairo_surface_t *image; // image cairo surface
double x1, y1; // upper left corner
double x2, y2; // lower right corner
};
//------------------------------------------------------------------------
// CairoOutputDev
//------------------------------------------------------------------------
class CairoOutputDev: public OutputDev {
public:
// Constructor.
CairoOutputDev();
// Destructor.
virtual ~CairoOutputDev();
//----- get info about output device
// Does this device use upside-down coordinates?
// (Upside-down means (0,0) is the top left corner of the page.)
bool upsideDown() override { return true; }
// Does this device use drawChar() or drawString()?
bool useDrawChar() override { return true; }
// Does this device use tilingPatternFill()? If this returns false,
// tiling pattern fills will be reduced to a series of other drawing
// operations.
bool useTilingPatternFill() override { return true; }
// Does this device use functionShadedFill(), axialShadedFill(), and
// radialShadedFill()? If this returns false, these shaded fills
// will be reduced to a series of other drawing operations.
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 12, 0)
bool useShadedFills(int type) override { return type <= 7; }
#else
bool useShadedFills(int type) override { return type > 1 && type < 4; }
#endif
// Does this device use FillColorStop()?
bool useFillColorStop() override { return true; }
// Does this device use beginType3Char/endType3Char? Otherwise,
// text in Type 3 fonts will be drawn with drawChar/drawString.
bool interpretType3Chars() override { return false; }
// Does this device need to clip pages to the crop box even when the
// box is the crop box?
bool needClipToCropBox() override { return true; }
//----- initialization and control
// Start a page.
void startPage(int pageNum, GfxState *state, XRef *xref) override;
// End a page.
void endPage() override;
//----- save/restore graphics state
void saveState(GfxState *state) override;
void restoreState(GfxState *state) override;
//----- update graphics state
void updateAll(GfxState *state) override;
void setDefaultCTM(const double *ctm) override;
void updateCTM(GfxState *state, double m11, double m12,
double m21, double m22, double m31, double m32) override;
void updateLineDash(GfxState *state) override;
void updateFlatness(GfxState *state) override;
void updateLineJoin(GfxState *state) override;
void updateLineCap(GfxState *state) override;
void updateMiterLimit(GfxState *state) override;
void updateLineWidth(GfxState *state) override;
void updateFillColor(GfxState *state) override;
void updateStrokeColor(GfxState *state) override;
void updateFillOpacity(GfxState *state) override;
void updateStrokeOpacity(GfxState *state) override;
void updateFillColorStop(GfxState *state, double offset) override;
void updateBlendMode(GfxState *state) override;
//----- update text state
void updateFont(GfxState *state) override;
//----- path painting
void stroke(GfxState *state) override;
void fill(GfxState *state) override;
void eoFill(GfxState *state) override;
void clipToStrokePath(GfxState *state) override;
bool tilingPatternFill(GfxState *state, Gfx *gfx, Catalog *cat, Object *str,
const double *pmat, int paintType, int tilingType, Dict *resDict,
const double *mat, const double *bbox,
int x0, int y0, int x1, int y1,
double xStep, double yStep) override;
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 12, 0)
bool functionShadedFill(GfxState *state, GfxFunctionShading *shading) override;
#endif
bool axialShadedFill(GfxState *state, GfxAxialShading *shading, double tMin, double tMax) override;
bool axialShadedSupportExtend(GfxState *state, GfxAxialShading *shading) override;
bool radialShadedFill(GfxState *state, GfxRadialShading *shading, double sMin, double sMax) override;
bool radialShadedSupportExtend(GfxState *state, GfxRadialShading *shading) override;
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 12, 0)
bool gouraudTriangleShadedFill(GfxState *state, GfxGouraudTriangleShading *shading) override;
bool patchMeshShadedFill(GfxState *state, GfxPatchMeshShading *shading) override;
#endif
//----- path clipping
void clip(GfxState *state) override;
void eoClip(GfxState *state) override;
//----- text drawing
void beginString(GfxState *state, const GooString *s) override;
void endString(GfxState *state) override;
void drawChar(GfxState *state, double x, double y,
double dx, double dy,
double originX, double originY,
CharCode code, int nBytes, const Unicode *u, int uLen) override;
void beginActualText(GfxState *state, const GooString *text) override;
void endActualText(GfxState *state) override;
bool beginType3Char(GfxState *state, double x, double y,
double dx, double dy,
CharCode code, const Unicode *u, int uLen) override;
void endType3Char(GfxState *state) override;
void beginTextObject(GfxState *state) override;
void endTextObject(GfxState *state) override;
//----- image drawing
void drawImageMask(GfxState *state, Object *ref, Stream *str,
int width, int height, bool invert, bool interpolate,
bool inlineImg) override;
void setSoftMaskFromImageMask(GfxState *state,
Object *ref, Stream *str,
int width, int height, bool invert,
bool inlineImg, double *baseMatrix) override;
void unsetSoftMaskFromImageMask(GfxState *state, double *baseMatrix) override;
void drawImageMaskPrescaled(GfxState *state, Object *ref, Stream *str,
int width, int height, bool invert, bool interpolate,
bool inlineImg);
void drawImageMaskRegular(GfxState *state, Object *ref, Stream *str,
int width, int height, bool invert, bool interpolate,
bool inlineImg);
void drawImage(GfxState *state, Object *ref, Stream *str,
int width, int height, GfxImageColorMap *colorMap,
bool interpolate, const int *maskColors, bool inlineImg) override;
void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
int width, int height,
GfxImageColorMap *colorMap,
bool interpolate,
Stream *maskStr,
int maskWidth, int maskHeight,
GfxImageColorMap *maskColorMap,
bool maskInterpolate) override;
void drawMaskedImage(GfxState *state, Object *ref, Stream *str,
int width, int height,
GfxImageColorMap *colorMap,
bool interpolate,
Stream *maskStr,
int maskWidth, int maskHeight,
bool maskInvert, bool maskInterpolate) override;
//----- transparency groups and soft masks
void beginTransparencyGroup(GfxState * /*state*/, const double * /*bbox*/,
GfxColorSpace * /*blendingColorSpace*/,
bool /*isolated*/, bool /*knockout*/,
bool /*forSoftMask*/) override;
void endTransparencyGroup(GfxState * /*state*/) override;
void popTransparencyGroup();
void paintTransparencyGroup(GfxState * /*state*/, const double * /*bbox*/) override;
void setSoftMask(GfxState * /*state*/, const double * /*bbox*/, bool /*alpha*/,
Function * /*transferFunc*/, GfxColor * /*backdropColor*/) override;
void clearSoftMask(GfxState * /*state*/) override;
//----- Type 3 font operators
void type3D0(GfxState *state, double wx, double wy) override;
void type3D1(GfxState *state, double wx, double wy,
double llx, double lly, double urx, double ury) override;
//----- special access
// Called to indicate that a new PDF document has been loaded.
void startDoc(PDFDoc *docA, CairoFontEngine *fontEngine = nullptr);
bool isReverseVideo() { return false; }
void setCairo (cairo_t *cr);
void setTextPage (TextPage *text);
void setPrinting (bool printingA) { printing = printingA; needFontUpdate = true; }
void setAntialias(cairo_antialias_t antialias);
void setInType3Char(bool inType3CharA) { inType3Char = inType3CharA; }
void getType3GlyphWidth (double *wx, double *wy) { *wx = t3_glyph_wx; *wy = t3_glyph_wy; }
bool hasType3GlyphBBox () { return t3_glyph_has_bbox; }
double *getType3GlyphBBox () { return t3_glyph_bbox; }
protected:
void doPath(cairo_t *cairo, GfxState *state, const GfxPath *path);
cairo_surface_t *downscaleSurface(cairo_surface_t *orig_surface);
void getScaledSize(const cairo_matrix_t *matrix,
int orig_width, int orig_height,
int *scaledWidth, int *scaledHeight);
cairo_filter_t getFilterForSurface(cairo_surface_t *image,
bool interpolate);
bool getStreamData (Stream *str, char **buffer, int *length);
void setMimeData(GfxState *state, Stream *str, Object *ref,
GfxImageColorMap *colorMap, cairo_surface_t *image, int height);
void fillToStrokePathClip(GfxState *state);
void alignStrokeCoords(const GfxSubpath *subpath, int i, double *x, double *y);
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 14, 0)
bool setMimeDataForJBIG2Globals (Stream *str, cairo_surface_t *image);
#endif
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 15, 10)
bool setMimeDataForCCITTParams(Stream *str, cairo_surface_t *image, int height);
#endif
static void setContextAntialias(cairo_t *cr, cairo_antialias_t antialias);
GfxRGB fill_color, stroke_color;
cairo_pattern_t *fill_pattern, *stroke_pattern;
double fill_opacity;
double stroke_opacity;
bool stroke_adjust;
bool adjusted_stroke_width;
bool align_stroke_coords;
CairoFont *currentFont;
XRef *xref;
struct StrokePathClip {
GfxPath *path;
cairo_matrix_t ctm;
double line_width;
double *dashes;
int dash_count;
double dash_offset;
cairo_line_cap_t cap;
cairo_line_join_t join;
double miter;
int ref_count;
} *strokePathClip;
PDFDoc *doc; // the current document
static FT_Library ft_lib;
static bool ft_lib_initialized;
CairoFontEngine *fontEngine;
bool fontEngine_owner;
cairo_t *cairo;
cairo_matrix_t orig_matrix;
bool needFontUpdate; // set when the font needs to be updated
bool printing;
bool use_show_text_glyphs;
bool text_matrix_valid;
cairo_glyph_t *glyphs;
int glyphCount;
cairo_text_cluster_t *clusters;
int clusterCount;
char *utf8;
int utf8Count;
int utf8Max;
cairo_path_t *textClipPath;
bool inUncoloredPattern; // inside a uncolored pattern (PaintType = 2)
bool inType3Char; // inside a Type 3 CharProc
double t3_glyph_wx, t3_glyph_wy;
bool t3_glyph_has_bbox;
double t3_glyph_bbox[4];
cairo_antialias_t antialias;
bool prescaleImages;
TextPage *textPage; // text for the current page
ActualText *actualText;
cairo_pattern_t *group;
cairo_pattern_t *shape;
cairo_pattern_t *mask;
cairo_matrix_t mask_matrix;
cairo_t *cairo_shape;
int knockoutCount;
struct ColorSpaceStack {
bool knockout;
GfxColorSpace *cs;
cairo_matrix_t group_matrix;
struct ColorSpaceStack *next;
} * groupColorSpaceStack;
struct MaskStack {
cairo_pattern_t *mask;
cairo_matrix_t mask_matrix;
struct MaskStack *next;
} *maskStack;
};
//------------------------------------------------------------------------
// CairoImageOutputDev
//------------------------------------------------------------------------
//XXX: this should ideally not inherit from CairoOutputDev but use it instead perhaps
class CairoImageOutputDev: public CairoOutputDev {
public:
// Constructor.
CairoImageOutputDev();
// Destructor.
virtual ~CairoImageOutputDev();
//----- get info about output device
// Does this device use upside-down coordinates?
// (Upside-down means (0,0) is the top left corner of the page.)
bool upsideDown() override { return true; }
// Does this device use drawChar() or drawString()?
bool useDrawChar() override { return false; }
// Does this device use tilingPatternFill()? If this returns false,
// tiling pattern fills will be reduced to a series of other drawing
// operations.
bool useTilingPatternFill() override { return true; }
// Does this device use functionShadedFill(), axialShadedFill(), and
// radialShadedFill()? If this returns false, these shaded fills
// will be reduced to a series of other drawing operations.
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 11, 2)
bool useShadedFills(int type) override { return type <= 7; }
#else
bool useShadedFills(int type) override { return type < 4; }
#endif
// Does this device use FillColorStop()?
bool useFillColorStop() override { return false; }
// Does this device use beginType3Char/endType3Char? Otherwise,
// text in Type 3 fonts will be drawn with drawChar/drawString.
bool interpretType3Chars() override { return false; }
// Does this device need non-text content?
bool needNonText() override { return true; }
//----- save/restore graphics state
void saveState(GfxState *state) override { }
void restoreState(GfxState *state) override { }
//----- update graphics state
void updateAll(GfxState *state) override { }
void setDefaultCTM(const double *ctm) override { }
void updateCTM(GfxState *state, double m11, double m12,
double m21, double m22, double m31, double m32) override { }
void updateLineDash(GfxState *state) override { }
void updateFlatness(GfxState *state) override { }
void updateLineJoin(GfxState *state) override { }
void updateLineCap(GfxState *state) override { }
void updateMiterLimit(GfxState *state) override { }
void updateLineWidth(GfxState *state) override { }
void updateFillColor(GfxState *state) override { }
void updateStrokeColor(GfxState *state) override { }
void updateFillOpacity(GfxState *state) override { }
void updateStrokeOpacity(GfxState *state) override { }
void updateBlendMode(GfxState *state) override { }
//----- update text state
void updateFont(GfxState *state) override { }
//----- path painting
void stroke(GfxState *state) override { }
void fill(GfxState *state) override { }
void eoFill(GfxState *state) override { }
void clipToStrokePath(GfxState *state) override { }
bool tilingPatternFill(GfxState *state, Gfx *gfx, Catalog *cat, Object *str,
const double *pmat, int paintType, int tilingType, Dict *resDict,
const double *mat, const double *bbox,
int x0, int y0, int x1, int y1,
double xStep, double yStep) override { return true; }
bool axialShadedFill(GfxState *state,
GfxAxialShading *shading,
double tMin, double tMax) override { return true; }
bool radialShadedFill(GfxState *state,
GfxRadialShading *shading,
double sMin, double sMax) override { return true; }
//----- path clipping
void clip(GfxState *state) override { }
void eoClip(GfxState *state) override { }
//----- image drawing
void drawImageMask(GfxState *state, Object *ref, Stream *str,
int width, int height, bool invert,
bool interpolate, bool inlineImg) override;
void drawImage(GfxState *state, Object *ref, Stream *str,
int width, int height, GfxImageColorMap *colorMap,
bool interpolate, const int *maskColors, bool inlineImg) override;
void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
int width, int height,
GfxImageColorMap *colorMap,
bool interpolate,
Stream *maskStr,
int maskWidth, int maskHeight,
GfxImageColorMap *maskColorMap,
bool maskInterpolate) override;
void drawMaskedImage(GfxState *state, Object *ref, Stream *str,
int width, int height,
GfxImageColorMap *colorMap,
bool interpolate,
Stream *maskStr,
int maskWidth, int maskHeight,
bool maskInvert, bool maskInterpolate) override;
void setSoftMaskFromImageMask(GfxState *state, Object *ref, Stream *str,
int width, int height, bool invert,
bool inlineImg, double *baseMatrix) override;
void unsetSoftMaskFromImageMask(GfxState *state, double *baseMatrix) override {}
//----- transparency groups and soft masks
void beginTransparencyGroup(GfxState * /*state*/, const double * /*bbox*/,
GfxColorSpace * /*blendingColorSpace*/,
bool /*isolated*/, bool /*knockout*/,
bool /*forSoftMask*/) override {}
void endTransparencyGroup(GfxState * /*state*/) override {}
void paintTransparencyGroup(GfxState * /*state*/, const double * /*bbox*/) override {}
void setSoftMask(GfxState * /*state*/, const double * /*bbox*/, bool /*alpha*/,
Function * /*transferFunc*/, GfxColor * /*backdropColor*/) override {}
void clearSoftMask(GfxState * /*state*/) override {}
//----- Image list
// By default images are not rendred
void setImageDrawDecideCbk(bool (*cbk)(int img_id, void *data),
void *data) { imgDrawCbk = cbk; imgDrawCbkData = data; }
// Iterate through list of images.
int getNumImages() const { return numImages; }
CairoImage *getImage(int i) const { return images[i]; }
private:
void saveImage(CairoImage *image);
void getBBox(GfxState *state, int width, int height,
double *x1, double *y1, double *x2, double *y2);
CairoImage **images;
int numImages;
int size;
bool (*imgDrawCbk)(int img_id, void *data);
void *imgDrawCbkData;
};
#endif

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/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
/*
* Copyright © 2009 Mozilla Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Mozilla Corporation not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Mozilla Corporation makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
* SHALL MOZILLA CORPORATION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*
* Author: Jeff Muizelaar, Mozilla Corp.
*/
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2012 Hib Eris <hib@hiberis.nl>
// Copyright (C) 2012, 2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
// Copyright (C) 2019 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2019 Marek Kasik <mkasik@redhat.com>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
/* This implements a box filter that supports non-integer box sizes */
#include <poppler-config.h>
#include <cstdint>
#include <stdint.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <math.h>
#include "goo/gmem.h"
#include "CairoRescaleBox.h"
/* we work in fixed point where 1. == 1 << 24 */
#define FIXED_SHIFT 24
static void downsample_row_box_filter (
int start, int width,
uint32_t *src, const uint32_t *src_limit, uint32_t *dest,
const int coverage[], int pixel_coverage)
{
/* we need an array of the pixel contribution of each destination pixel on the boundaries.
* we invert the value to get the value on the other size of the box */
/*
value = a * contribution * 1/box_size
value += a * 1/box_size
value += a * 1/box_size
value += a * 1/box_size
value += a * (1 - contribution) * 1/box_size
a * (1/box_size - contribution * 1/box_size)
box size is constant
value = a * contribution_a * 1/box_size + b * contribution_b * 1/box_size
contribution_b = (1 - contribution_a)
= (1 - contribution_a_next)
*/
/* box size = ceil(src_width/dest_width) */
int x = 0;
/* skip to start */
/* XXX: it might be possible to do this directly instead of iteratively, however
* the iterative solution is simple */
while (x < start && src < src_limit)
{
int box = 1 << FIXED_SHIFT;
int start_coverage = coverage[x];
box -= start_coverage;
src++;
while (box >= pixel_coverage && src < src_limit)
{
src++;
box -= pixel_coverage;
}
x++;
}
while (x < start + width && src < src_limit)
{
uint32_t a = 0;
uint32_t r = 0;
uint32_t g = 0;
uint32_t b = 0;
int box = 1 << FIXED_SHIFT;
int start_coverage = coverage[x];
a = ((*src >> 24) & 0xff) * start_coverage;
r = ((*src >> 16) & 0xff) * start_coverage;
g = ((*src >> 8) & 0xff) * start_coverage;
b = ((*src >> 0) & 0xff) * start_coverage;
src++;
x++;
box -= start_coverage;
while (box >= pixel_coverage && src < src_limit)
{
a += ((*src >> 24) & 0xff) * pixel_coverage;
r += ((*src >> 16) & 0xff) * pixel_coverage;
g += ((*src >> 8) & 0xff) * pixel_coverage;
b += ((*src >> 0) & 0xff) * pixel_coverage;
src++;
box -= pixel_coverage;
}
/* multiply by whatever is leftover
* this ensures that we don't bias down.
* i.e. start_coverage + n*pixel_coverage + box == 1 << 24 */
if (box > 0 && src < src_limit)
{
a += ((*src >> 24) & 0xff) * box;
r += ((*src >> 16) & 0xff) * box;
g += ((*src >> 8) & 0xff) * box;
b += ((*src >> 0) & 0xff) * box;
}
a >>= FIXED_SHIFT;
r >>= FIXED_SHIFT;
g >>= FIXED_SHIFT;
b >>= FIXED_SHIFT;
*dest = (a << 24) | (r << 16) | (g << 8) | b;
dest++;
}
}
static void downsample_columns_box_filter (
int n,
int start_coverage,
int pixel_coverage,
uint32_t *src, uint32_t *dest)
{
int stride = n;
while (n--) {
uint32_t a = 0;
uint32_t r = 0;
uint32_t g = 0;
uint32_t b = 0;
uint32_t *column_src = src;
int box = 1 << FIXED_SHIFT;
a = ((*column_src >> 24) & 0xff) * start_coverage;
r = ((*column_src >> 16) & 0xff) * start_coverage;
g = ((*column_src >> 8) & 0xff) * start_coverage;
b = ((*column_src >> 0) & 0xff) * start_coverage;
column_src += stride;
box -= start_coverage;
while (box >= pixel_coverage)
{
a += ((*column_src >> 24) & 0xff) * pixel_coverage;
r += ((*column_src >> 16) & 0xff) * pixel_coverage;
g += ((*column_src >> 8) & 0xff) * pixel_coverage;
b += ((*column_src >> 0) & 0xff) * pixel_coverage;
column_src += stride;
box -= pixel_coverage;
}
if (box > 0) {
a += ((*column_src >> 24) & 0xff) * box;
r += ((*column_src >> 16) & 0xff) * box;
g += ((*column_src >> 8) & 0xff) * box;
b += ((*column_src >> 0) & 0xff) * box;
}
a >>= FIXED_SHIFT;
r >>= FIXED_SHIFT;
g >>= FIXED_SHIFT;
b >>= FIXED_SHIFT;
*dest = (a << 24) | (r << 16) | (g << 8) | b;
dest++;
src++;
}
}
static int compute_coverage (int coverage[], int src_length, int dest_length)
{
int i;
/* num = src_length/dest_length
total = sum(pixel) / num
pixel * 1/num == pixel * dest_length / src_length
*/
/* the average contribution of each source pixel */
int ratio = ((1 << 24)*(long long int)dest_length)/src_length;
/* because ((1 << 24)*(long long int)dest_length) won't always be divisible by src_length
* we'll need someplace to put the other bits.
*
* We want to ensure a + n*ratio < 1<<24
*
* 1<<24
* */
double scale = (double)src_length/dest_length;
/* for each destination pixel compute the coverage of the left most pixel included in the box */
/* I have a proof of this, which this margin is too narrow to contain */
for (i=0; i<dest_length; i++)
{
double left_side = i*scale;
double right_side = (i+1)*scale;
double right_fract = right_side - floor (right_side);
double left_fract = ceil (left_side) - left_side;
int overage;
/* find out how many source pixels will be used to fill the box */
int count = floor (right_side) - ceil (left_side);
/* what's the maximum value this expression can become?
floor((i+1)*scale) - ceil(i*scale)
(i+1)*scale - i*scale == scale
since floor((i+1)*scale) <= (i+1)*scale
and ceil(i*scale) >= i*scale
floor((i+1)*scale) - ceil(i*scale) <= scale
further since: floor((i+1)*scale) - ceil(i*scale) is an integer
therefore:
floor((i+1)*scale) - ceil(i*scale) <= floor(scale)
*/
if (left_fract == 0.)
count--;
/* compute how much the right-most pixel contributes */
overage = ratio*(right_fract);
/* the remainder is the amount that the left-most pixel
* contributes */
coverage[i] = (1<<24) - (count * ratio + overage);
}
return ratio;
}
bool CairoRescaleBox::downScaleImage(unsigned orig_width, unsigned orig_height,
signed scaled_width, signed scaled_height,
unsigned short int start_column, unsigned short int start_row,
unsigned short int width, unsigned short int height,
cairo_surface_t *dest_surface) {
int pixel_coverage_x, pixel_coverage_y;
int dest_y;
int src_y = 0;
uint32_t *scanline;
int *x_coverage = nullptr;
int *y_coverage = nullptr;
uint32_t *temp_buf = nullptr;
bool retval = false;
unsigned int *dest;
int dst_stride;
dest = reinterpret_cast<unsigned int *>(cairo_image_surface_get_data (dest_surface));
dst_stride = cairo_image_surface_get_stride (dest_surface);
scanline = (uint32_t*)gmallocn (orig_width, sizeof(int));
x_coverage = (int *)gmallocn (orig_width, sizeof(int));
y_coverage = (int *)gmallocn (orig_height, sizeof(int));
/* we need to allocate enough room for ceil(src_height/dest_height)+1
Example:
src_height = 140
dest_height = 50
src_height/dest_height = 2.8
|-------------| 2.8 pixels
|----|----|----|----| 4 pixels
need to sample 3 pixels
|-------------| 2.8 pixels
|----|----|----|----| 4 pixels
need to sample 4 pixels
*/
temp_buf = (uint32_t *)gmallocn3 ((orig_height + scaled_height-1)/scaled_height+1, scaled_width, sizeof(uint32_t));
if (!x_coverage || !y_coverage || !scanline || !temp_buf)
goto cleanup;
pixel_coverage_x = compute_coverage (x_coverage, orig_width, scaled_width);
pixel_coverage_y = compute_coverage (y_coverage, orig_height, scaled_height);
assert (width + start_column <= scaled_width);
/* skip the rows at the beginning */
for (dest_y = 0; dest_y < start_row; dest_y++)
{
int box = 1 << FIXED_SHIFT;
int start_coverage_y = y_coverage[dest_y];
box -= start_coverage_y;
src_y++;
while (box >= pixel_coverage_y)
{
box -= pixel_coverage_y;
src_y++;
}
}
for (; dest_y < start_row + height; dest_y++)
{
int columns = 0;
int box = 1 << FIXED_SHIFT;
int start_coverage_y = y_coverage[dest_y];
getRow(src_y, scanline);
downsample_row_box_filter (start_column, width, scanline, scanline + orig_width, temp_buf + width * columns, x_coverage, pixel_coverage_x);
columns++;
src_y++;
box -= start_coverage_y;
while (box >= pixel_coverage_y)
{
getRow(src_y, scanline);
downsample_row_box_filter (start_column, width, scanline, scanline + orig_width, temp_buf + width * columns, x_coverage, pixel_coverage_x);
columns++;
src_y++;
box -= pixel_coverage_y;
}
/* downsample any leftovers */
if (box > 0)
{
getRow(src_y, scanline);
downsample_row_box_filter (start_column, width, scanline, scanline + orig_width, temp_buf + width * columns, x_coverage, pixel_coverage_x);
columns++;
}
/* now scale the rows we just downsampled in the y direction */
downsample_columns_box_filter (width, start_coverage_y, pixel_coverage_y, temp_buf, dest);
dest += dst_stride / 4;
// assert(width*columns <= ((orig_height + scaled_height-1)/scaled_height+1) * width);
}
// assert (src_y<=orig_height);
retval = true;
cleanup:
free (x_coverage);
free (y_coverage);
free (temp_buf);
free (scanline);
return retval;
}

64
pdf2htmlEX/3rdparty/poppler/git/CairoRescaleBox.h vendored
View File

@ -1,64 +0,0 @@
/*
* Copyright © 2009 Mozilla Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Mozilla Corporation not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Mozilla Corporation makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* MOZILLA CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
* SHALL MOZILLA CORPORATION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*
* Author: Jeff Muizelaar, Mozilla Corp.
*/
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2012 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2018 Albert Astals Cid <aacid@kde.org>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
#ifndef CAIRO_RESCALE_BOX_H
#define CAIRO_RESCALE_BOX_H
#include <cairo.h>
class CairoRescaleBox {
public:
CairoRescaleBox() {};
virtual ~CairoRescaleBox() {};
CairoRescaleBox(const CairoRescaleBox &) = delete;
CairoRescaleBox& operator=(const CairoRescaleBox &) = delete;
virtual bool downScaleImage(unsigned orig_width, unsigned orig_height,
signed scaled_width, signed scaled_height,
unsigned short int start_column, unsigned short int start_row,
unsigned short int width, unsigned short int height,
cairo_surface_t *dest_surface);
virtual void getRow(int row_num, uint32_t *row_data) = 0;
};
#endif /* CAIRO_RESCALE_BOX_H */

29
pdf2htmlEX/CMakeLists.txt
View File

@ -23,41 +23,32 @@ find_package(PkgConfig)
# SINCE we have a very intimate relationship with a particular version of # SINCE we have a very intimate relationship with a particular version of
# poppler... we explicitly describe the poppler include and library # poppler... we explicitly describe the poppler include and library
# paths. # paths.
#
include_directories( include_directories(
../poppler/build/poppler ../poppler/build/poppler
../poppler/build ../poppler/build
../poppler/poppler ../poppler/poppler
../poppler ../poppler
) )
#
#link_directories( # The following order is critical as the glib functions use functions
# ../poppler/build # located in the main poppler library
#) #
set(POPPLER_LIBRARIES ${POPPLER_LIBRARIES} set(POPPLER_LIBRARIES ${POPPLER_LIBRARIES}
${CMAKE_SOURCE_DIR}/../poppler/build/libpoppler.a
${CMAKE_SOURCE_DIR}/../poppler/build/glib/libpoppler-glib.a ${CMAKE_SOURCE_DIR}/../poppler/build/glib/libpoppler-glib.a
${CMAKE_SOURCE_DIR}/../poppler/build/libpoppler.a
) )
if(ENABLE_SVG) if(ENABLE_SVG)
pkg_check_modules(CAIRO REQUIRED cairo>=1.10.0) pkg_check_modules(CAIRO REQUIRED cairo>=1.10.0)
message("Trying to locate cairo-svg...") message("-- Trying to locate cairo-svg...")
find_path(CAIRO_SVG_INCLUDE_PATH cairo-svg.h PATHS ${CAIRO_INCLUDE_DIRS} NO_DEFAULT_PATH) find_path(CAIRO_SVG_INCLUDE_PATH cairo-svg.h PATHS ${CAIRO_INCLUDE_DIRS} NO_DEFAULT_PATH)
if(CAIRO_SVG_INCLUDE_PATH) if(CAIRO_SVG_INCLUDE_PATH)
message("-- found cairo-svg...")
include_directories(${CAIRO_INCLUDE_DIRS}) include_directories(${CAIRO_INCLUDE_DIRS})
link_directories(${CAIRO_LIBRARY_DIRS}) link_directories(${CAIRO_LIBRARY_DIRS})
set(PDF2HTMLEX_LIBS ${PDF2HTMLEX_LIBS} ${CAIRO_LIBRARIES}) set(PDF2HTMLEX_LIBS ${PDF2HTMLEX_LIBS} ${CAIRO_LIBRARIES})
set(ENABLE_SVG 1) set(ENABLE_SVG 1)
set(CAIROOUTPUTDEV_PATH 3rdparty/poppler/git)
include_directories(${CAIROOUTPUTDEV_PATH})
set(PDF2HTMLEX_SRC ${PDF2HTMLEX_SRC}
${CAIROOUTPUTDEV_PATH}/CairoFontEngine.h
${CAIROOUTPUTDEV_PATH}/CairoFontEngine.cc
${CAIROOUTPUTDEV_PATH}/CairoRescaleBox.h
${CAIROOUTPUTDEV_PATH}/CairoRescaleBox.cc
${CAIROOUTPUTDEV_PATH}/CairoOutputDev.h
${CAIROOUTPUTDEV_PATH}/CairoOutputDev.cc
)
else() else()
message(FATAL_ERROR "Error: no SVG support found in Cairo") message(FATAL_ERROR "Error: no SVG support found in Cairo")
endif() endif()
@ -71,14 +62,14 @@ endif()
# SINCE we have a very intimate relationship with a particular version of # SINCE we have a very intimate relationship with a particular version of
# fontforge... we explicitly describe the fontforge include and library # fontforge... we explicitly describe the fontforge include and library
# paths. # paths.
#
include_directories( include_directories(
../fontforge/fontforge ../fontforge/fontforge
../fontforge ../fontforge
../fontforge/build/inc ../fontforge/build/inc
../fontforge/inc ../fontforge/inc
) )
#
include_directories(${FONTFORGE_INCLUDE_DIRS}) include_directories(${FONTFORGE_INCLUDE_DIRS})
link_directories(${FONTFORGE_LIBRARY_DIRS}) link_directories(${FONTFORGE_LIBRARY_DIRS})
set(FONTFORGE_LIBRARIES ${FONTFORGE_LIBRARIES} set(FONTFORGE_LIBRARIES ${FONTFORGE_LIBRARIES}