fz_error
pdf_loadinlineimage(fz_pixmap **pixp, pdf_xref *xref, fz_obj *rdb, fz_obj *dict, fz_stream *file)
{
fz_error error;
pdf_logimage("load inline image {\n");
error = pdf_loadimageimp(pixp, xref, rdb, dict, file, 0);
if (error)
return fz_rethrow(error, "cannot load inline image");
pdf_logimage("}\n");
return fz_okay;
}
void pdf_convpixmap(fz_colorspace *ss, fz_pixmap *sp, fz_colorspace *ds, fz_pixmap *dp)
{
pdf_logimage("convert pixmap from %s to %s\n", ss->name, ds->name);
if (ss == pdf_devicegray)
{
if (ds == pdf_devicergb) fastgraytorgb(sp, dp);
else if (ds == pdf_devicecmyk) fastgraytocmyk(sp, dp);
else fz_stdconvpixmap(ss, sp, ds, dp);
}
else if (ss == pdf_devicergb)
{
if (ds == pdf_devicegray) fastrgbtogray(sp, dp);
else if (ds == pdf_devicecmyk) fastrgbtocmyk(sp, dp);
else fz_stdconvpixmap(ss, sp, ds, dp);
}
else if (ss == pdf_devicecmyk)
{
if (ds == pdf_devicegray) fastcmyktogray(sp, dp);
else if (ds == pdf_devicergb) fastcmyktorgb(sp, dp);
else fz_stdconvpixmap(ss, sp, ds, dp);
}
else fz_stdconvpixmap(ss, sp, ds, dp);
}
fz_error
pdf_loadimage(fz_pixmap **pixp, pdf_xref *xref, fz_obj *dict)
{
fz_error error;
if ((*pixp = pdf_finditem(xref->store, fz_droppixmap, dict)))
{
fz_keeppixmap(*pixp);
return fz_okay;
}
pdf_logimage("load image (%d 0 R) {\n", fz_tonum(dict));
error = pdf_loadimageimp(pixp, xref, nil, dict, nil, 0);
if (error)
return fz_rethrow(error, "cannot load image (%d 0 R)", fz_tonum(dict));
pdf_storeitem(xref->store, fz_keeppixmap, fz_droppixmap, dict, *pixp);
pdf_logimage("}\n");
return fz_okay;
}
static void
loadcolorkey(int *colorkey, int bpc, int indexed, fz_obj *obj)
{
int scale = 1;
int i;
pdf_logimage("keyed mask\n");
if (!indexed)
{
switch (bpc)
{
case 1: scale = 255; break;
case 2: scale = 85; break;
case 4: scale = 17; break;
case 8: scale = 1; break;
}
}
for (i = 0; i < fz_arraylen(obj); i++)
colorkey[i] = fz_toint(fz_arrayget(obj, i)) * scale;
}
static fz_error
pdf_loadjpximage(fz_pixmap **imgp, pdf_xref *xref, fz_obj *dict)
{
fz_error error;
fz_buffer *buf;
fz_pixmap *img;
fz_obj *obj;
pdf_logimage("jpeg2000\n");
error = pdf_loadstream(&buf, xref, fz_tonum(dict), fz_togen(dict));
if (error)
return fz_rethrow(error, "cannot load jpx image data");
error = fz_loadjpximage(&img, buf->data, buf->len);
if (error)
{
fz_dropbuffer(buf);
return fz_rethrow(error, "cannot load jpx image");
}
fz_dropbuffer(buf);
obj = fz_dictgetsa(dict, "SMask", "Mask");
if (fz_isdict(obj))
{
error = pdf_loadimageimp(&img->mask, xref, nil, obj, nil, 1);
if (error)
{
fz_droppixmap(img);
return fz_rethrow(error, "cannot load image mask/softmask");
}
}
obj = fz_dictgets(dict, "ColorSpace");
if (obj)
{
fz_colorspace *original = img->colorspace;
img->colorspace = nil;
error = pdf_loadcolorspace(&img->colorspace, xref, obj);
if (error)
{
fz_dropcolorspace(original);
return fz_rethrow(error, "cannot load image colorspace");
}
if (original->n != img->colorspace->n)
{
fz_warn("jpeg-2000 colorspace (%s) does not match promised colorspace (%s)", original->name, img->colorspace->name);
fz_dropcolorspace(img->colorspace);
img->colorspace = original;
}
else
fz_dropcolorspace(original);
if (!strcmp(img->colorspace->name, "Indexed"))
{
fz_pixmap *conv;
conv = pdf_expandindexedpixmap(img);
fz_droppixmap(img);
img = conv;
}
}
*imgp = img;
return fz_okay;
}
static fz_error
pdf_loadimageimp(fz_pixmap **imgp, pdf_xref *xref, fz_obj *rdb, fz_obj *dict, fz_stream *cstm, int forcemask)
{
fz_stream *stm;
fz_pixmap *tile;
fz_obj *obj, *res;
fz_error error;
int w, h, bpc, n;
int imagemask;
int interpolate;
int indexed;
fz_colorspace *colorspace;
fz_pixmap *mask; /* explicit mask/softmask image */
int usecolorkey;
int colorkey[FZ_MAXCOLORS * 2];
float decode[FZ_MAXCOLORS * 2];
int scale;
int stride;
unsigned char *samples;
int i, len;
/* special case for JPEG2000 images */
if (pdf_isjpximage(dict))
{
tile = nil;
error = pdf_loadjpximage(&tile, xref, dict);
if (error)
return fz_rethrow(error, "cannot load jpx image");
if (forcemask)
{
if (tile->n != 2)
{
fz_droppixmap(tile);
return fz_throw("softmask must be grayscale");
}
mask = fz_alphafromgray(tile, 1);
fz_droppixmap(tile);
*imgp = mask;
return fz_okay;
}
*imgp = tile;
return fz_okay;
}
w = fz_toint(fz_dictgetsa(dict, "Width", "W"));
h = fz_toint(fz_dictgetsa(dict, "Height", "H"));
bpc = fz_toint(fz_dictgetsa(dict, "BitsPerComponent", "BPC"));
imagemask = fz_tobool(fz_dictgetsa(dict, "ImageMask", "IM"));
interpolate = fz_tobool(fz_dictgetsa(dict, "Interpolate", "I"));
indexed = 0;
usecolorkey = 0;
colorspace = nil;
mask = nil;
if (imagemask)
bpc = 1;
if (w == 0)
return fz_throw("image width is zero");
if (h == 0)
return fz_throw("image height is zero");
if (bpc == 0)
return fz_throw("image depth is zero");
if (w > (1 << 16))
return fz_throw("image is too wide");
if (h > (1 << 16))
return fz_throw("image is too high");
obj = fz_dictgetsa(dict, "ColorSpace", "CS");
if (obj && !imagemask && !forcemask)
{
/* colorspace resource lookup is only done for inline images */
if (fz_isname(obj))
{
res = fz_dictget(fz_dictgets(rdb, "ColorSpace"), obj);
if (res)
obj = res;
}
error = pdf_loadcolorspace(&colorspace, xref, obj);
if (error)
return fz_rethrow(error, "cannot load image colorspace");
if (!strcmp(colorspace->name, "Indexed"))
indexed = 1;
n = colorspace->n;
}
else
{
n = 1;
}
obj = fz_dictgetsa(dict, "Decode", "D");
if (obj)
{
for (i = 0; i < n * 2; i++)
decode[i] = fz_toreal(fz_arrayget(obj, i));
}
else
{
float maxval = indexed ? (1 << bpc) - 1 : 1;
for (i = 0; i < n * 2; i++)
decode[i] = i & 1 ? maxval : 0;
}
obj = fz_dictgetsa(dict, "SMask", "Mask");
if (fz_isdict(obj))
{
/* Not allowed for inline images */
if (!cstm)
{
error = pdf_loadimageimp(&mask, xref, rdb, obj, nil, 1);
if (error)
{
if (colorspace)
fz_dropcolorspace(colorspace);
return fz_rethrow(error, "cannot load image mask/softmask");
}
}
}
else if (fz_isarray(obj))
{
usecolorkey = 1;
for (i = 0; i < n * 2; i++)
colorkey[i] = fz_toint(fz_arrayget(obj, i));
}
stride = (w * n * bpc + 7) / 8;
samples = fz_calloc(h, stride);
if (cstm)
{
stm = pdf_openinlinestream(cstm, xref, dict, stride * h);
}
else
{
error = pdf_openstream(&stm, xref, fz_tonum(dict), fz_togen(dict));
if (error)
{
if (colorspace)
fz_dropcolorspace(colorspace);
if (mask)
fz_droppixmap(mask);
return fz_rethrow(error, "cannot open image data stream (%d 0 R)", fz_tonum(dict));
}
}
len = fz_read(stm, samples, h * stride);
if (len < 0)
{
fz_close(stm);
if (colorspace)
fz_dropcolorspace(colorspace);
if (mask)
fz_droppixmap(mask);
return fz_rethrow(len, "cannot read image data");
}
/* Make sure we read the EOF marker (for inline images only) */
if (cstm)
{
unsigned char tbuf[512];
int tlen = fz_read(stm, tbuf, sizeof tbuf);
if (tlen < 0)
fz_catch(tlen, "ignoring error at end of image");
if (tlen > 0)
fz_warn("ignoring garbage at end of image");
}
fz_close(stm);
/* Pad truncated images */
if (len < stride * h)
{
fz_warn("padding truncated image (%d 0 R)", fz_tonum(dict));
memset(samples + len, 0, stride * h - len);
}
/* Invert 1-bit image masks */
if (imagemask)
{
/* 0=opaque and 1=transparent so we need to invert */
unsigned char *p = samples;
len = h * stride;
for (i = 0; i < len; i++)
p[i] = ~p[i];
}
pdf_logimage("size %dx%d n=%d bpc=%d imagemask=%d indexed=%d\n", w, h, n, bpc, imagemask, indexed);
/* Unpack samples into pixmap */
tile = fz_newpixmap(colorspace, 0, 0, w, h);
scale = 1;
if (!indexed)
{
switch (bpc)
{
case 1: scale = 255; break;
case 2: scale = 85; break;
case 4: scale = 17; break;
}
}
fz_unpacktile(tile, samples, n, bpc, stride, scale);
if (usecolorkey)
pdf_maskcolorkey(tile, n, colorkey);
if (indexed)
{
fz_pixmap *conv;
fz_decodeindexedtile(tile, decode, (1 << bpc) - 1);
conv = pdf_expandindexedpixmap(tile);
fz_droppixmap(tile);
tile = conv;
}
else
{
fz_decodetile(tile, decode);
}
if (colorspace)
fz_dropcolorspace(colorspace);
tile->mask = mask;
tile->interpolate = interpolate;
fz_free(samples);
*imgp = tile;
return fz_okay;
}
/* TODO error cleanup */
fz_error *
pdf_loadimage(pdf_image **imgp, pdf_xref *xref, fz_obj *dict, fz_obj *ref)
{
fz_error *error;
pdf_image *img;
pdf_image *mask;
int ismask;
fz_obj *obj;
fz_obj *sub;
int i;
int w, h, bpc;
int n = 0;
int a = 0;
int usecolorkey = 0;
fz_colorspace *cs = nil;
pdf_indexed *indexed = nil;
int stride;
#ifndef PSP
printf("LI\n");
#endif
if ((*imgp = pdf_finditem(xref->store, PDF_KIMAGE, ref)))
{
fz_keepimage((fz_image*)*imgp);
return nil;
}
img = fz_malloc(sizeof(pdf_image));
if (!img)
return fz_outofmem;
img->super.refs = 0;
pdf_logimage("load image %d %d (%p) {\n", fz_tonum(ref), fz_togen(ref), img);
/*
* Dimensions, BPC and ColorSpace
*/
w = fz_toint(fz_dictgets(dict, "Width"));
h = fz_toint(fz_dictgets(dict, "Height"));
bpc = fz_toint(fz_dictgets(dict, "BitsPerComponent"));
pdf_logimage("size %dx%d %d\n", w, h, bpc);
cs = nil;
obj = fz_dictgets(dict, "ColorSpace");
if (obj)
{
cs = pdf_finditem(xref->store, PDF_KCOLORSPACE, obj);
if (cs)
fz_keepcolorspace(cs);
else
{
error = pdf_resolve(&obj, xref);
if (error)
return error;
error = pdf_loadcolorspace(&cs, xref, obj);
if (error)
return error;
fz_dropobj(obj);
}
if (!strcmp(cs->name, "Indexed"))
{
pdf_logimage("indexed\n");
indexed = (pdf_indexed*)cs;
cs = indexed->base;
}
n = cs->n;
a = 0;
pdf_logimage("colorspace %s\n", cs->name);
}
/*
* ImageMask, Mask and SoftMask
*/
mask = nil;
ismask = fz_tobool(fz_dictgets(dict, "ImageMask"));
if (ismask)
{
pdf_logimage("is mask\n");
bpc = 1;
n = 0;
a = 1;
}
obj = fz_dictgets(dict, "SMask");
if (fz_isindirect(obj))
{
pdf_logimage("has soft mask\n");
error = pdf_loadindirect(&sub, xref, obj);
if (error)
return error;
error = pdf_loadimage(&mask, xref, sub, obj);
if (error)
return error;
if (mask->super.cs != pdf_devicegray)
return fz_throw("syntaxerror: SMask must be DeviceGray");
mask->super.cs = 0;
mask->super.n = 0;
mask->super.a = 1;
fz_dropobj(sub);
}
obj = fz_dictgets(dict, "Mask");
if (fz_isindirect(obj))
{
error = pdf_loadindirect(&sub, xref, obj);
if (error)
return error;
if (fz_isarray(sub))
{
usecolorkey = 1;
loadcolorkey(img->colorkey, bpc, indexed != nil, sub);
}
else
{
pdf_logimage("has mask\n");
error = pdf_loadimage(&mask, xref, sub, obj);
if (error)
return error;
}
fz_dropobj(sub);
}
else if (fz_isarray(obj))
{
usecolorkey = 1;
loadcolorkey(img->colorkey, bpc, indexed != nil, obj);
}
/*
* Decode
*/
obj = fz_dictgets(dict, "Decode");
if (fz_isarray(obj))
{
pdf_logimage("decode array\n");
if (indexed)
for (i = 0; i < 2; i++)
img->decode[i] = fz_toreal(fz_arrayget(obj, i));
else
for (i = 0; i < (n + a) * 2; i++)
img->decode[i] = fz_toreal(fz_arrayget(obj, i));
}
else
{
if (indexed)
for (i = 0; i < 2; i++)
img->decode[i] = i & 1 ? (1 << bpc) - 1 : 0;
else
for (i = 0; i < (n + a) * 2; i++)
img->decode[i] = i & 1;
}
/*
* Load samples
*/
if (indexed)
stride = (w * bpc + 7) / 8;
else
stride = (w * (n + a) * bpc + 7) / 8;
// ccm
// do not load images larger than 2MB uncompressed
int early_reject = 0;
if (h * stride <= 2*1024*1024) {
error = pdf_loadstream(&img->samples, xref, fz_tonum(ref), fz_togen(ref));
if (error)
{
/* TODO: colorspace? */
fz_free(img);
return error;
}
if (img->samples->wp - img->samples->bp < stride * h)
{
/* TODO: colorspace? */
fz_dropbuffer(img->samples);
fz_free(img);
return fz_throw("syntaxerror: truncated image data");
}
/* 0 means opaque and 1 means transparent, so we invert to get alpha */
if (ismask)
{
unsigned char *p;
for (p = img->samples->bp; p < img->samples->ep; p++)
*p = ~*p;
}
} else {
#ifndef PSP
printf("LI - %p - early reject\n", img);
#endif
img->samples = nil;
early_reject = 1;
}
/*
* Create image object
*/
img->super.loadtile = pdf_loadtile;
img->super.drop = pdf_dropimage;
img->super.cs = cs;
img->super.w = w;
img->super.h = h;
img->super.n = n;
img->super.a = a;
img->indexed = indexed;
img->stride = stride;
img->bpc = bpc;
img->mask = (fz_image*)mask;
img->usecolorkey = usecolorkey;
if (img->mask)
fz_keepimage(img->mask);
// ccm
#if 1
int bs = 0;
if (img->samples)
bs = (int)(img->samples->wp) - (int)(img->samples->rp);
if (early_reject || (image_buffers_size + bs >= image_buffers_size_max)) {
#ifndef PSP
printf("LI - %p - optimized out\n", img);
#endif
if (img->samples)
fz_dropbuffer(img->samples);
if (img->mask)
fz_dropimage(img->mask);
fz_newbuffer(&img->samples, 8);
img->super.w = 1;
img->super.h = 1;
img->super.n = 3;
img->super.a = 0;
img->super.refs = 0;
unsigned char *p;
for (p = img->samples->bp; p < img->samples->ep; p++)
*p = 0x7f;
img->indexed = 0;
img->stride = (1 * (3 + 0) * 8 + 7) / 8; //(w * (n + a) * bpc + 7) / 8;
img->super.cs = cs;
img->super.loadtile = fakeImageTile;
img->bpc = 8;
img->mask = NULL;
img->usecolorkey = 0;
} else {
image_buffers_size += bs;
}
#endif
pdf_logimage("}\n");
error = pdf_storeitem(xref->store, PDF_KIMAGE, ref, img);
if (error)
{
fz_dropimage((fz_image*)img);
return error;
}
*imgp = img;
return nil;
}
fz_error *
pdf_loadinlineimage(pdf_image **imgp, pdf_xref *xref,
fz_obj *rdb, fz_obj *dict, fz_stream *file)
{
fz_error *error;
pdf_image *img;
fz_filter *filter;
fz_obj *f;
fz_obj *cs;
fz_obj *d;
int ismask;
int i;
img = fz_malloc(sizeof(pdf_image));
if (!img)
return fz_outofmem;
pdf_logimage("load inline image %p {\n", img);
img->super.loadtile = pdf_loadtile;
img->super.drop = pdf_dropimage;
img->super.n = 0;
img->super.a = 0;
img->super.refs = 0;
img->indexed = nil;
img->usecolorkey = 0;
img->mask = nil;
img->super.w = fz_toint(fz_dictgetsa(dict, "Width", "W"));
img->super.h = fz_toint(fz_dictgetsa(dict, "Height", "H"));
img->bpc = fz_toint(fz_dictgetsa(dict, "BitsPerComponent", "BPC"));
ismask = fz_tobool(fz_dictgetsa(dict, "ImageMask", "IM"));
d = fz_dictgetsa(dict, "Decode", "D");
cs = fz_dictgetsa(dict, "ColorSpace", "CS");
pdf_logimage("size %dx%d %d\n", img->super.w, img->super.h, img->bpc);
if (ismask)
{
pdf_logimage("is mask\n");
img->super.cs = nil;
img->super.n = 0;
img->super.a = 1;
img->bpc = 1;
}
if (cs)
{
img->super.cs = nil;
if (fz_isname(cs))
{
fz_obj *csd = fz_dictgets(rdb, "ColorSpace");
if (csd)
{
fz_obj *cso = fz_dictget(csd, cs);
img->super.cs = pdf_finditem(xref->store, PDF_KCOLORSPACE, cso);
if (img->super.cs)
fz_keepcolorspace(img->super.cs);
}
}
if (!img->super.cs)
{
/* XXX danger! danger! does this resolve? */
error = pdf_loadcolorspace(&img->super.cs, xref, cs);
if (error)
return error;
}
if (!strcmp(img->super.cs->name, "Indexed"))
{
pdf_logimage("indexed\n");
img->indexed = (pdf_indexed*)img->super.cs;
img->super.cs = img->indexed->base;
}
pdf_logimage("colorspace %s\n", img->super.cs->name);
img->super.n = img->super.cs->n;
img->super.a = 0;
}
if (fz_isarray(d))
{
pdf_logimage("decode array\n");
if (img->indexed)
for (i = 0; i < 2; i++)
img->decode[i] = fz_toreal(fz_arrayget(d, i));
else
for (i = 0; i < (img->super.n + img->super.a) * 2; i++)
img->decode[i] = fz_toreal(fz_arrayget(d, i));
}
else
{
if (img->indexed)
for (i = 0; i < 2; i++)
img->decode[i] = i & 1 ? (1 << img->bpc) - 1 : 0;
else
for (i = 0; i < (img->super.n + img->super.a) * 2; i++)
img->decode[i] = i & 1;
}
if (img->indexed)
img->stride = (img->super.w * img->bpc + 7) / 8;
else
img->stride = (img->super.w * (img->super.n + img->super.a) * img->bpc + 7) / 8;
/* load image data */
f = fz_dictgetsa(dict, "Filter", "F");
if (f)
{
fz_stream *tempfile;
error = pdf_buildinlinefilter(&filter, dict);
if (error)
return error;
error = fz_openrfilter(&tempfile, filter, file);
if (error)
return error;
i = fz_readall(&img->samples, tempfile);
if (i < 0)
return fz_ioerror(tempfile);
fz_dropfilter(filter);
fz_dropstream(tempfile);
}
else
{
error = fz_newbuffer(&img->samples, img->super.h * img->stride);
if (error)
return error;
i = fz_read(file, img->samples->bp, img->super.h * img->stride);
if (i < 0)
return fz_ioerror(file);
img->samples->wp += img->super.h * img->stride;
}
/* 0 means opaque and 1 means transparent, so we invert to get alpha */
if (ismask)
{
unsigned char *p;
for (p = img->samples->bp; p < img->samples->ep; p++)
*p = ~*p;
}
pdf_logimage("}\n");
*imgp = img;
return nil;
}
