fz_image *
fz_new_image_from_data(fz_context *ctx, unsigned char *data, int len)
{
fz_buffer *buffer = NULL;
fz_image *image;
fz_var(buffer);
fz_var(data);
fz_try(ctx)
{
buffer = fz_new_buffer_from_data(ctx, data, len);
data = NULL;
image = fz_new_image_from_buffer(ctx, buffer);
}
fz_always(ctx)
{
fz_drop_buffer(ctx, buffer);
}
fz_catch(ctx)
{
fz_free(ctx, data);
fz_rethrow(ctx);
}
return image;
}
/* SumatraPDF: allow to clone a stream */
static fz_stream *reopen_buffer(fz_context *ctx, fz_stream *stm)
{
fz_stream *clone;
fz_buffer *orig = stm->state;
fz_buffer *buf = fz_new_buffer_from_data(ctx, orig->data, orig->len);
clone = fz_open_buffer(ctx, buf);
fz_drop_buffer(ctx, buf);
return clone;
}
fz_font *
xps_lookup_font(fz_context *ctx, xps_document *doc, char *base_uri, char *font_uri, char *style_att)
{
char partname[1024];
char fakename[1024];
char *subfont;
int subfontid = 0;
xps_part *part;
fz_font *font;
xps_resolve_url(ctx, doc, partname, base_uri, font_uri, sizeof partname);
subfont = strrchr(partname, '#');
if (subfont)
{
subfontid = atoi(subfont + 1);
*subfont = 0;
}
/* Make a new part name for font with style simulation applied */
fz_strlcpy(fakename, partname, sizeof fakename);
if (style_att)
{
if (!strcmp(style_att, "BoldSimulation"))
fz_strlcat(fakename, "#Bold", sizeof fakename);
else if (!strcmp(style_att, "ItalicSimulation"))
fz_strlcat(fakename, "#Italic", sizeof fakename);
else if (!strcmp(style_att, "BoldItalicSimulation"))
fz_strlcat(fakename, "#BoldItalic", sizeof fakename);
}
font = xps_lookup_font_imp(ctx, doc, fakename);
if (!font)
{
fz_buffer *buf = NULL;
fz_var(buf);
fz_try(ctx)
{
part = xps_read_part(ctx, doc, partname);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot find font resource part '%s'", partname);
return NULL;
}
/* deobfuscate if necessary */
if (strstr(part->name, ".odttf"))
xps_deobfuscate_font_resource(ctx, doc, part);
if (strstr(part->name, ".ODTTF"))
xps_deobfuscate_font_resource(ctx, doc, part);
fz_try(ctx)
{
buf = fz_new_buffer_from_data(ctx, part->data, part->size);
/* part->data is now owned by buf */
part->data = NULL;
font = fz_new_font_from_buffer(ctx, NULL, buf, subfontid, 1);
}
fz_always(ctx)
{
fz_drop_buffer(ctx, buf);
xps_drop_part(ctx, doc, part);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot load font resource '%s'", partname);
return NULL;
}
if (style_att)
{
font->ft_bold = !!strstr(style_att, "Bold");
font->ft_italic = !!strstr(style_att, "Italic");
}
xps_select_best_font_encoding(ctx, doc, font);
xps_insert_font(ctx, doc, fakename, font);
}
void
xps_parse_glyphs(fz_context *ctx, xps_document *doc, const fz_matrix *ctm,
char *base_uri, xps_resource *dict, fz_xml *root)
{
fz_device *dev = doc->dev;
fz_xml *node;
char *fill_uri;
char *opacity_mask_uri;
char *bidi_level_att;
char *fill_att;
char *font_size_att;
char *font_uri_att;
char *origin_x_att;
char *origin_y_att;
char *is_sideways_att;
char *indices_att;
char *unicode_att;
char *style_att;
char *transform_att;
char *clip_att;
char *opacity_att;
char *opacity_mask_att;
char *navigate_uri_att;
fz_xml *transform_tag = NULL;
fz_xml *clip_tag = NULL;
fz_xml *fill_tag = NULL;
fz_xml *opacity_mask_tag = NULL;
char *fill_opacity_att = NULL;
xps_part *part;
fz_font *font;
char partname[1024];
char fakename[1024];
char *subfont;
float font_size = 10;
int subfontid = 0;
int is_sideways = 0;
int bidi_level = 0;
fz_text *text;
fz_rect area;
fz_matrix local_ctm = *ctm;
/*
* Extract attributes and extended attributes.
*/
bidi_level_att = fz_xml_att(root, "BidiLevel");
fill_att = fz_xml_att(root, "Fill");
font_size_att = fz_xml_att(root, "FontRenderingEmSize");
font_uri_att = fz_xml_att(root, "FontUri");
origin_x_att = fz_xml_att(root, "OriginX");
origin_y_att = fz_xml_att(root, "OriginY");
is_sideways_att = fz_xml_att(root, "IsSideways");
indices_att = fz_xml_att(root, "Indices");
unicode_att = fz_xml_att(root, "UnicodeString");
style_att = fz_xml_att(root, "StyleSimulations");
transform_att = fz_xml_att(root, "RenderTransform");
clip_att = fz_xml_att(root, "Clip");
opacity_att = fz_xml_att(root, "Opacity");
opacity_mask_att = fz_xml_att(root, "OpacityMask");
navigate_uri_att = fz_xml_att(root, "FixedPage.NavigateUri");
for (node = fz_xml_down(root); node; node = fz_xml_next(node))
{
if (fz_xml_is_tag(node, "Glyphs.RenderTransform"))
transform_tag = fz_xml_down(node);
if (fz_xml_is_tag(node, "Glyphs.OpacityMask"))
opacity_mask_tag = fz_xml_down(node);
if (fz_xml_is_tag(node, "Glyphs.Clip"))
clip_tag = fz_xml_down(node);
if (fz_xml_is_tag(node, "Glyphs.Fill"))
fill_tag = fz_xml_down(node);
}
fill_uri = base_uri;
opacity_mask_uri = base_uri;
xps_resolve_resource_reference(ctx, doc, dict, &transform_att, &transform_tag, NULL);
xps_resolve_resource_reference(ctx, doc, dict, &clip_att, &clip_tag, NULL);
xps_resolve_resource_reference(ctx, doc, dict, &fill_att, &fill_tag, &fill_uri);
xps_resolve_resource_reference(ctx, doc, dict, &opacity_mask_att, &opacity_mask_tag, &opacity_mask_uri);
/*
* Check that we have all the necessary information.
*/
if (!font_size_att || !font_uri_att || !origin_x_att || !origin_y_att) {
fz_warn(ctx, "missing attributes in glyphs element");
return;
}
if (!indices_att && !unicode_att)
return; /* nothing to draw */
if (is_sideways_att)
is_sideways = !strcmp(is_sideways_att, "true");
if (bidi_level_att)
bidi_level = atoi(bidi_level_att);
/*
* Find and load the font resource
*/
xps_resolve_url(ctx, doc, partname, base_uri, font_uri_att, sizeof partname);
subfont = strrchr(partname, '#');
if (subfont)
{
subfontid = atoi(subfont + 1);
*subfont = 0;
}
/* Make a new part name for font with style simulation applied */
fz_strlcpy(fakename, partname, sizeof fakename);
if (style_att)
{
if (!strcmp(style_att, "BoldSimulation"))
fz_strlcat(fakename, "#Bold", sizeof fakename);
else if (!strcmp(style_att, "ItalicSimulation"))
fz_strlcat(fakename, "#Italic", sizeof fakename);
else if (!strcmp(style_att, "BoldItalicSimulation"))
fz_strlcat(fakename, "#BoldItalic", sizeof fakename);
}
font = xps_lookup_font(ctx, doc, fakename);
if (!font)
{
fz_buffer *buf = NULL;
fz_var(buf);
fz_try(ctx)
{
part = xps_read_part(ctx, doc, partname);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot find font resource part '%s'", partname);
return;
}
/* deobfuscate if necessary */
if (strstr(part->name, ".odttf"))
xps_deobfuscate_font_resource(ctx, doc, part);
if (strstr(part->name, ".ODTTF"))
xps_deobfuscate_font_resource(ctx, doc, part);
fz_try(ctx)
{
buf = fz_new_buffer_from_data(ctx, part->data, part->size);
/* part->data is now owned by buf */
part->data = NULL;
font = fz_new_font_from_buffer(ctx, NULL, buf, subfontid, 1);
}
fz_always(ctx)
{
fz_drop_buffer(ctx, buf);
xps_drop_part(ctx, doc, part);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot load font resource '%s'", partname);
return;
}
if (style_att)
{
font->ft_bold = !!strstr(style_att, "Bold");
font->ft_italic = !!strstr(style_att, "Italic");
}
xps_select_best_font_encoding(ctx, doc, font);
xps_insert_font(ctx, doc, fakename, font);
}
pdf_obj *
pdf_add_image(fz_context *ctx, pdf_document *doc, fz_image *image)
{
fz_pixmap *pixmap = NULL;
pdf_obj *imobj = NULL;
pdf_obj *dp;
fz_buffer *buffer = NULL;
pdf_obj *imref = NULL;
fz_compressed_buffer *cbuffer;
unsigned char digest[16];
int i, n;
/* If we can maintain compression, do so */
cbuffer = fz_compressed_image_buffer(ctx, image);
fz_var(pixmap);
fz_var(buffer);
fz_var(imobj);
fz_var(imref);
/* Check if the same image already exists in this doc. */
imref = pdf_find_image_resource(ctx, doc, image, digest);
if (imref)
return imref;
imobj = pdf_add_new_dict(ctx, doc, 3);
fz_try(ctx)
{
dp = pdf_dict_put_dict(ctx, imobj, PDF_NAME(DecodeParms), 3);
pdf_dict_put(ctx, imobj, PDF_NAME(Type), PDF_NAME(XObject));
pdf_dict_put(ctx, imobj, PDF_NAME(Subtype), PDF_NAME(Image));
if (cbuffer)
{
fz_compression_params *cp = &cbuffer->params;
switch (cp ? cp->type : FZ_IMAGE_UNKNOWN)
{
default:
goto raw_or_unknown_compression;
case FZ_IMAGE_JPEG:
if (cp->u.jpeg.color_transform != -1)
pdf_dict_put_int(ctx, dp, PDF_NAME(ColorTransform), cp->u.jpeg.color_transform);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(DCTDecode));
break;
case FZ_IMAGE_JPX:
if (cp->u.jpx.smask_in_data)
pdf_dict_put_int(ctx, dp, PDF_NAME(SMaskInData), cp->u.jpx.smask_in_data);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(JPXDecode));
break;
case FZ_IMAGE_FAX:
if (cp->u.fax.columns)
pdf_dict_put_int(ctx, dp, PDF_NAME(Columns), cp->u.fax.columns);
if (cp->u.fax.rows)
pdf_dict_put_int(ctx, dp, PDF_NAME(Rows), cp->u.fax.rows);
if (cp->u.fax.k)
pdf_dict_put_int(ctx, dp, PDF_NAME(K), cp->u.fax.k);
if (cp->u.fax.end_of_line)
pdf_dict_put_bool(ctx, dp, PDF_NAME(EndOfLine), cp->u.fax.end_of_line);
if (cp->u.fax.encoded_byte_align)
pdf_dict_put_bool(ctx, dp, PDF_NAME(EncodedByteAlign), cp->u.fax.encoded_byte_align);
if (cp->u.fax.end_of_block)
pdf_dict_put_bool(ctx, dp, PDF_NAME(EndOfBlock), cp->u.fax.end_of_block);
if (cp->u.fax.black_is_1)
pdf_dict_put_bool(ctx, dp, PDF_NAME(BlackIs1), cp->u.fax.black_is_1);
if (cp->u.fax.damaged_rows_before_error)
pdf_dict_put_int(ctx, dp, PDF_NAME(DamagedRowsBeforeError), cp->u.fax.damaged_rows_before_error);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(CCITTFaxDecode));
break;
case FZ_IMAGE_FLATE:
if (cp->u.flate.columns)
pdf_dict_put_int(ctx, dp, PDF_NAME(Columns), cp->u.flate.columns);
if (cp->u.flate.colors)
pdf_dict_put_int(ctx, dp, PDF_NAME(Colors), cp->u.flate.colors);
if (cp->u.flate.predictor)
pdf_dict_put_int(ctx, dp, PDF_NAME(Predictor), cp->u.flate.predictor);
if (cp->u.flate.bpc)
pdf_dict_put_int(ctx, dp, PDF_NAME(BitsPerComponent), cp->u.flate.bpc);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(FlateDecode));
pdf_dict_put_int(ctx, imobj, PDF_NAME(BitsPerComponent), image->bpc);
break;
case FZ_IMAGE_LZW:
if (cp->u.lzw.columns)
pdf_dict_put_int(ctx, dp, PDF_NAME(Columns), cp->u.lzw.columns);
if (cp->u.lzw.colors)
pdf_dict_put_int(ctx, dp, PDF_NAME(Colors), cp->u.lzw.colors);
if (cp->u.lzw.predictor)
pdf_dict_put_int(ctx, dp, PDF_NAME(Predictor), cp->u.lzw.predictor);
if (cp->u.lzw.early_change)
pdf_dict_put_int(ctx, dp, PDF_NAME(EarlyChange), cp->u.lzw.early_change);
if (cp->u.lzw.bpc)
pdf_dict_put_int(ctx, dp, PDF_NAME(BitsPerComponent), cp->u.lzw.bpc);
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(LZWDecode));
break;
case FZ_IMAGE_RLD:
pdf_dict_put(ctx, imobj, PDF_NAME(Filter), PDF_NAME(RunLengthDecode));
break;
}
if (!pdf_dict_len(ctx, dp))
pdf_dict_del(ctx, imobj, PDF_NAME(DecodeParms));
buffer = fz_keep_buffer(ctx, cbuffer->buffer);
if (image->use_decode)
{
pdf_obj *ary = pdf_dict_put_array(ctx, imobj, PDF_NAME(Decode), image->n * 2);
for (i = 0; i < image->n * 2; ++i)
pdf_array_push_real(ctx, ary, image->decode[i]);
}
}
else
{
unsigned int size;
int h;
unsigned char *d, *s;
raw_or_unknown_compression:
/* Currently, set to maintain resolution; should we consider
* subsampling here according to desired output res? */
pixmap = fz_get_pixmap_from_image(ctx, image, NULL, NULL, NULL, NULL);
n = pixmap->n - pixmap->alpha - pixmap->s; /* number of colorants */
if (n == 0)
n = 1; /* treat pixmaps with only alpha or spots as grayscale */
size = image->w * n;
h = image->h;
s = pixmap->samples;
d = fz_malloc(ctx, size * h);
buffer = fz_new_buffer_from_data(ctx, d, size * h);
if (n == pixmap->n)
{
/* If we use all channels, we can copy the data as is. */
while (h--)
{
memcpy(d, s, size);
d += size;
s += pixmap->stride;
}
}
else
{
/* Need to remove the alpha and spot planes. */
/* TODO: extract alpha plane to a soft mask. */
/* TODO: convert spots to colors. */
int line_skip = pixmap->stride - pixmap->w * pixmap->n;
int skip = pixmap->n - n;
while (h--)
{
int w = pixmap->w;
while (w--)
{
int k;
for (k = 0; k < n; ++k)
*d++ = *s++;
s += skip;
}
s += line_skip;
}
}
}
pdf_dict_put_int(ctx, imobj, PDF_NAME(Width), pixmap ? pixmap->w : image->w);
pdf_dict_put_int(ctx, imobj, PDF_NAME(Height), pixmap ? pixmap->h : image->h);
if (image->imagemask)
{
pdf_dict_put_bool(ctx, imobj, PDF_NAME(ImageMask), 1);
}
else
{
fz_colorspace *cs;
pdf_dict_put_int(ctx, imobj, PDF_NAME(BitsPerComponent), image->bpc);
cs = pixmap ? pixmap->colorspace : image->colorspace;
switch (fz_colorspace_type(ctx, cs))
{
case FZ_COLORSPACE_INDEXED:
{
fz_colorspace *basecs;
unsigned char *lookup = NULL;
int high = 0;
int basen;
pdf_obj *arr;
lookup = fz_indexed_colorspace_palette(ctx, cs, &high);
basecs = fz_colorspace_base(ctx, cs);
basen = fz_colorspace_n(ctx, basecs);
arr = pdf_dict_put_array(ctx, imobj, PDF_NAME(ColorSpace), 4);
pdf_array_push(ctx, arr, PDF_NAME(Indexed));
switch (fz_colorspace_type(ctx, basecs))
{
case FZ_COLORSPACE_GRAY:
pdf_array_push(ctx, arr, PDF_NAME(DeviceGray));
break;
case FZ_COLORSPACE_RGB:
pdf_array_push(ctx, arr, PDF_NAME(DeviceRGB));
break;
case FZ_COLORSPACE_CMYK:
pdf_array_push(ctx, arr, PDF_NAME(DeviceCMYK));
break;
default:
// TODO: convert to RGB!
fz_throw(ctx, FZ_ERROR_GENERIC, "only indexed Gray, RGB, and CMYK colorspaces supported");
break;
}
pdf_array_push_int(ctx, arr, high);
pdf_array_push_string(ctx, arr, (char *) lookup, basen * (high + 1));
}
break;
case FZ_COLORSPACE_NONE:
case FZ_COLORSPACE_GRAY:
pdf_dict_put(ctx, imobj, PDF_NAME(ColorSpace), PDF_NAME(DeviceGray));
break;
case FZ_COLORSPACE_RGB:
pdf_dict_put(ctx, imobj, PDF_NAME(ColorSpace), PDF_NAME(DeviceRGB));
break;
case FZ_COLORSPACE_CMYK:
pdf_dict_put(ctx, imobj, PDF_NAME(ColorSpace), PDF_NAME(DeviceCMYK));
break;
default:
// TODO: convert to RGB!
fz_throw(ctx, FZ_ERROR_GENERIC, "only Gray, RGB, and CMYK colorspaces supported");
break;
}
}
if (image->mask)
{
pdf_dict_put_drop(ctx, imobj, PDF_NAME(SMask), pdf_add_image(ctx, doc, image->mask));
}
pdf_update_stream(ctx, doc, imobj, buffer, 1);
/* Add ref to our image resource hash table. */
imref = pdf_insert_image_resource(ctx, doc, digest, imobj);
}
fz_always(ctx)
{
fz_drop_pixmap(ctx, pixmap);
fz_drop_buffer(ctx, buffer);
pdf_drop_obj(ctx, imobj);
}
fz_catch(ctx)
fz_rethrow(ctx);
return imref;
}