static void read_scale_img(image * a)
{
image_dict *ad;
if (a == NULL) {
luaL_error(Luas, "the image scaler needs a valid image");
} else {
ad = img_dict(a);
if (a == NULL) {
luaL_error(Luas, "the image scaler needs a valid dictionary");
} else {
if (img_state(ad) == DICT_NEW) {
if (img_type(ad) == IMG_TYPE_PDFSTREAM)
check_pdfstream_dict(ad);
else {
read_img(ad);
}
}
if ((img_type(ad) == IMG_TYPE_NONE) || (img_state(ad) == DICT_NEW)) {
normal_warning("image","don't rely on the image data to be okay");
img_width(a) = 0;
img_height(a) = 0;
img_depth(a) = 0;
} else if (is_wd_running(a) || is_ht_running(a) || is_dp_running(a)) {
img_dimen(a) = scale_img(ad, img_dimen(a), img_transform(a));
}
}
}
}
void write_img(PDF pdf, image_dict * idict)
{
if (img_state(idict) < DICT_WRITTEN) {
report_start_file(filetype_image, img_filepath(idict));
switch (img_type(idict)) {
case IMG_TYPE_PNG:
write_png(pdf, idict);
break;
case IMG_TYPE_JPG:
write_jpg(pdf, idict);
break;
case IMG_TYPE_JP2:
write_jp2(pdf, idict);
break;
case IMG_TYPE_JBIG2:
write_jbig2(pdf, idict);
break;
case IMG_TYPE_PDFMEMSTREAM:
case IMG_TYPE_PDF:
write_epdf(pdf, idict,(int) pdf_suppress_optional_info);
break;
case IMG_TYPE_PDFSTREAM:
write_pdfstream(pdf, idict);
break;
default:
normal_error("pdf backend","internal error: writing unknown image type");
}
report_stop_file(filetype_image);
if (img_type(idict) == IMG_TYPE_PNG) {
write_additional_png_objects(pdf);
}
}
if (img_state(idict) < DICT_WRITTEN)
img_state(idict) = DICT_WRITTEN;
}
void pdf_dict_add_img_filename(PDF pdf, image_dict * idict)
{
char *p;
if ((pdf_image_addfilename > 0) && ((pdf_suppress_optional_info & 2) == 0)) {
/*tex
For now |PTEX.FileName| is only used for \PDF, but we're prepared
for \JPG, \PNG, ...
*/
if (! ( (img_type(idict) == IMG_TYPE_PDF) || (img_type(idict) == IMG_TYPE_PDFMEMSTREAM) ))
return;
if (img_visiblefilename(idict) != NULL) {
if (strlen(img_visiblefilename(idict)) == 0) {
/*tex empty string blocks PTEX.FileName output */
return;
} else {
p = img_visiblefilename(idict);
}
} else {
/*tex unset so let's use the default */
p = img_filepath(idict);
}
/*tex write additional information */
pdf_add_name(pdf, "PTEX.FileName");
pdf_printf(pdf, " (%s)", convertStringToPDFString(p, strlen(p)));
}
}
static void check_type_by_header(image_dict * idict)
{
int i;
FILE *file = NULL;
char header[MAX_HEADER];
char prefix[LEN_PDF_MEMSTREAM+1];
if (idict == NULL)
return;
if (img_type(idict) != IMG_TYPE_NONE)
return;
/*tex Here we read the and also check for a memstream object. */
if (!img_filepath(idict) || !FOPEN_RBIN_MODE) {
normal_error("pdf backend","reading image file failed");
}
file = fopen(img_filepath(idict), FOPEN_RBIN_MODE);
if (file == NULL) {
/*tex We check the prefix of img_filepath(idict). */
for (i = 0; (unsigned) i < LEN_PDF_MEMSTREAM; i++) {
prefix[i] = (char) (img_filepath(idict)[i]);
}
prefix[LEN_PDF_MEMSTREAM]='\0';
if (strncmp(prefix, HEADER_PDF_MEMSTREAM, LEN_PDF_MEMSTREAM) == 0) {
img_type(idict) = IMG_TYPE_PDFMEMSTREAM;
return;
} else {
formatted_error("pdf backend","reading image file '%s' failed",img_filepath(idict));
}
}
/*tex Do we have a valid file but perhaps unsupported? */
for (i = 0; (unsigned) i < MAX_HEADER; i++) {
header[i] = (char) xgetc(file);
if (feof(file)) {
normal_error("pdf backend","reading image file failed");
}
}
xfclose(file, img_filepath(idict));
/*tex Further tests: */
if (strncmp(header, HEADER_JPG, sizeof(HEADER_JPG) - 1) == 0)
img_type(idict) = IMG_TYPE_JPG;
else if (strncmp(header + 4, HEADER_JP2, sizeof(HEADER_JP2) - 1) == 0)
img_type(idict) = IMG_TYPE_JP2;
else if (strncmp(header, HEADER_PNG, sizeof(HEADER_PNG) - 1) == 0)
img_type(idict) = IMG_TYPE_PNG;
else if (strncmp(header, HEADER_JBIG2, sizeof(HEADER_JBIG2) - 1) == 0)
img_type(idict) = IMG_TYPE_JBIG2;
else if (strncmp(header, HEADER_PDF, sizeof(HEADER_PDF) - 1) == 0)
img_type(idict) = IMG_TYPE_PDF;
}
static void read_scale_img(image * a)
{
image_dict *ad;
assert(a != NULL);
ad = img_dict(a);
assert(ad != NULL);
if (img_state(ad) == DICT_NEW) {
if (img_type(ad) == IMG_TYPE_PDFSTREAM)
check_pdfstream_dict(ad);
else {
fix_pdf_minorversion(static_pdf);
read_img(static_pdf,
ad, pdf_minor_version, pdf_inclusion_errorlevel);
}
}
if (is_wd_running(a) || is_ht_running(a) || is_dp_running(a))
img_dimen(a) = scale_img(ad, img_dimen(a), img_transform(a));
}
void free_image_dict(image_dict * p)
{
if (ini_version) {
/*tex The image may be \.{\\dump}ed to a format. */
return;
}
/*tex Called from limglib.c. */
switch (img_type(p)) {
case IMG_TYPE_PDFMEMSTREAM:
case IMG_TYPE_PDF:
flush_pdf_info(p);
break;
case IMG_TYPE_PNG:
flush_png_info(p);
break;
case IMG_TYPE_JPG:
flush_jpg_info(p);
break;
case IMG_TYPE_JP2:
flush_jp2_info(p);
break;
case IMG_TYPE_JBIG2:
flush_jbig2_info(p);
break;
case IMG_TYPE_PDFSTREAM:
if (img_pdfstream_ptr(p) != NULL) {
xfree(img_pdfstream_stream(p));
xfree(img_pdfstream_ptr(p));
}
break;
case IMG_TYPE_NONE:
break;
default:
normal_error("pdf backend","unknown image type");
}
free_dict_strings(p);
xfree(p);
}
image_dict *new_image_dict(void)
{
image_dict *p = xtalloc(1, image_dict);
memset(p, 0, sizeof(image_dict));
set_wd_running(p);
set_ht_running(p);
set_dp_running(p);
img_transform(p) = 0;
img_pagenum(p) = 1;
img_type(p) = IMG_TYPE_NONE;
img_pagebox(p) = PDF_BOX_SPEC_MEDIA;
img_unset_bbox(p);
img_unset_group(p);
img_state(p) = DICT_NEW;
/*tex A value of -1 means unused while the used counts from 0 */
img_index(p) = -1;
img_luaref(p) = 0;
img_errorlevel(p) = pdf_inclusion_errorlevel;
fix_pdf_version(static_pdf);
img_pdfmajorversion(p) = pdf_major_version;
img_pdfminorversion(p) = pdf_minor_version;
return p;
}
static void check_type_by_extension(image_dict * idict)
{
char *image_suffix;
if (idict != NULL)
return;
if (img_type(idict) != IMG_TYPE_NONE)
return;
if ((image_suffix = strrchr(img_filename(idict), '.')) == 0)
img_type(idict) = IMG_TYPE_NONE;
else if (strcasecmp(image_suffix, ".png") == 0)
img_type(idict) = IMG_TYPE_PNG;
else if (strcasecmp(image_suffix, ".jpg") == 0 ||
strcasecmp(image_suffix, ".jpeg") == 0)
img_type(idict) = IMG_TYPE_JPG;
else if (strcasecmp(image_suffix, ".jp2") == 0)
img_type(idict) = IMG_TYPE_JP2;
else if (strcasecmp(image_suffix, ".jbig2") == 0 ||
strcasecmp(image_suffix, ".jb2") == 0)
img_type(idict) = IMG_TYPE_JBIG2;
else if (strcasecmp(image_suffix, ".pdf") == 0)
img_type(idict) = IMG_TYPE_PDF;
}
static void lua_to_image(lua_State * L, image * a)
{ /* value key table ... */
int i;
image_dict *d = img_dict(a);
assert(d != NULL);
lua_pushstring(L, IMG_ENV); /* s v k t ... */
lua_gettable(L, LUA_REGISTRYINDEX); /* t v k t ... */
lua_pushvalue(L, -3); /* k t v k t ... */
lua_gettable(L, -2); /* i? t v k t ... */
if (!lua_isnumber(L, -1)) /* !i t v k t ... */
luaL_error(L, "lua_to_image(): %s is not a valid image key",
lua_tostring(L, -4));
i = (int) lua_tointeger(L, -1); /* i t v k t ... */
lua_pop(L, 2); /* v k t ... */
switch (i) {
case P_WIDTH:
if (lua_isnil(L, -1))
set_wd_running(a);
else if (lua_type(L, -1) == LUA_TNUMBER)
img_width(a) = (int) lua_tointeger(L, -1);
else if (lua_type(L, -1) == LUA_TSTRING)
img_width(a) = dimen_to_number(L, lua_tostring(L, -1));
else
luaL_error(L,
"image.width needs integer or nil value or dimension string");
break;
case P_HEIGHT:
if (lua_isnil(L, -1))
set_ht_running(a);
else if (lua_type(L, -1) == LUA_TNUMBER)
img_height(a) = (int) lua_tointeger(L, -1);
else if (lua_type(L, -1) == LUA_TSTRING)
img_height(a) = dimen_to_number(L, lua_tostring(L, -1));
else
luaL_error(L,
"image.height needs integer or nil value or dimension string");
break;
case P_DEPTH:
if (lua_isnil(L, -1))
set_dp_running(a);
else if (lua_type(L, -1) == LUA_TNUMBER)
img_depth(a) = (int) lua_tointeger(L, -1);
else if (lua_type(L, -1) == LUA_TSTRING)
img_depth(a) = dimen_to_number(L, lua_tostring(L, -1));
else
luaL_error(L,
"image.depth needs integer or nil value or dimension string");
break;
case P_TRANSFORM:
if (lua_isnumber(L, -1))
img_transform(a) = (int) lua_tointeger(L, -1);
else
luaL_error(L, "image.transform needs integer value");
break;
/* now follow all image_dict entries */
case P_FILENAME:
if (img_state(d) >= DICT_FILESCANNED)
luaL_error(L, "image.filename is now read-only");
if (img_type(d) == IMG_TYPE_PDFSTREAM)
luaL_error(L, "image.filename can't be used with image.stream");
if (lua_isstring(L, -1)) {
xfree(img_filename(d));
img_filename(d) = xstrdup(lua_tostring(L, -1));
} else
luaL_error(L, "image.filename needs string value");
break;
case P_VISIBLEFILENAME:
if (img_state(d) >= DICT_FILESCANNED)
luaL_error(L, "image.visiblefilename is now read-only");
if (img_type(d) == IMG_TYPE_PDFSTREAM)
luaL_error(L,
"image.visiblefilename can't be used with image.stream");
if (lua_isstring(L, -1)) {
xfree(img_visiblefilename(d));
img_visiblefilename(d) = xstrdup(lua_tostring(L, -1));
} else
luaL_error(L, "image.visiblefilename needs string value");
break;
case P_ATTR:
if (img_state(d) >= DICT_FILESCANNED)
luaL_error(L, "image.attr is now read-only");
if (lua_isstring(L, -1) || lua_isnil(L, -1)) {
xfree(img_attr(d));
if (lua_isstring(L, -1))
img_attr(d) = xstrdup(lua_tostring(L, -1));
} else
luaL_error(L, "image.attr needs string or nil value");
break;
case P_PAGE:
if (img_state(d) >= DICT_FILESCANNED)
luaL_error(L, "image.page is now read-only");
if (lua_type(L, -1) == LUA_TSTRING) {
xfree(img_pagename(d));
img_pagename(d) = xstrdup(lua_tostring(L, -1));
img_pagenum(d) = 0;
} else if (lua_type(L, -1) == LUA_TNUMBER) {
img_pagenum(d) = (int) lua_tointeger(L, -1);
xfree(img_pagename(d));
} else
luaL_error(L, "image.page needs integer or string value");
break;
case P_COLORSPACE:
if (img_state(d) >= DICT_FILESCANNED)
luaL_error(L, "image.colorspace is now read-only");
if (lua_isnil(L, -1))
img_colorspace(d) = 0;
else if (lua_isnumber(L, -1))
img_colorspace(d) = (int) lua_tointeger(L, -1);
else
luaL_error(L, "image.colorspace needs integer or nil value");
break;
case P_PAGEBOX:
if (img_state(d) >= DICT_FILESCANNED)
luaL_error(L, "image.pagebox is now read-only");
if (lua_isnil(L, -1))
img_pagebox(d) = PDF_BOX_SPEC_NONE;
else if (lua_isstring(L, -1))
img_pagebox(d) = luaL_checkoption(L, -1, "none", pdfboxspec_s);
else
luaL_error(L, "image.pagebox needs string or nil value");
break;
case P_BBOX:
if (img_state(d) >= DICT_FILESCANNED)
luaL_error(L, "image.bbox is now read-only");
if (!lua_istable(L, -1))
luaL_error(L, "image.bbox needs table value");
if (lua_objlen(L, -1) != 4)
luaL_error(L, "image.bbox table must have exactly 4 elements");
for (i = 1; i <= 4; i++) { /* v k t ... */
lua_pushinteger(L, i); /* idx v k t ... */
lua_gettable(L, -2); /* int v k t ... */
if (lua_type(L, -1) == LUA_TNUMBER)
img_bbox(d)[i - 1] = (int) lua_tointeger(L, -1);
else if (lua_type(L, -1) == LUA_TSTRING)
img_bbox(d)[i - 1] = dimen_to_number(L, lua_tostring(L, -1));
else
luaL_error(L,
"image.bbox table needs integer value or dimension string elements");
lua_pop(L, 1); /* v k t ... */
}
img_set_bbox(d);
break;
case P_STREAM:
if (img_filename(d) != NULL)
luaL_error(L, "image.stream can't be used with image.filename");
if (img_state(d) >= DICT_FILESCANNED)
luaL_error(L, "image.stream is now read-only");
if (img_pdfstream_ptr(d) == NULL)
new_img_pdfstream_struct(d);
xfree(img_pdfstream_stream(d));
img_pdfstream_stream(d) = xstrdup(lua_tostring(L, -1));
img_type(d) = IMG_TYPE_PDFSTREAM;
break;
case P_FILEPATH:
case P_TOTALPAGES:
case P_XSIZE:
case P_YSIZE:
case P_XRES:
case P_YRES:
case P_ROTATION:
case P_IMAGETYPE:
case P_OBJNUM:
case P_INDEX:
case P_COLORDEPTH:
luaL_error(L, "image.%s is a read-only variable", img_parms[i].name);
break;
default:
assert(0);
} /* v k t ... */
}
static void image_to_lua(lua_State * L, image * a)
{ /* key user ... */
int i, j;
image_dict *d = img_dict(a);
assert(d != NULL);
lua_pushstring(L, IMG_ENV); /* s k u ... */
lua_gettable(L, LUA_REGISTRYINDEX); /* t k u ... */
lua_pushvalue(L, -2); /* k t k u ... */
lua_gettable(L, -2); /* i? t k u ... */
if (!lua_isnumber(L, -1)) /* !i t k u ... */
luaL_error(L, "image_to_lua(): %s is not a valid image key",
lua_tostring(L, -3));
i = (int) lua_tointeger(L, -1); /* i t k u ... */
lua_pop(L, 3); /* u ... */
switch (i) {
case P_WIDTH:
if (is_wd_running(a))
lua_pushnil(L);
else
lua_pushinteger(L, img_width(a));
break;
case P_HEIGHT:
if (is_ht_running(a))
lua_pushnil(L);
else
lua_pushinteger(L, img_height(a));
break;
case P_DEPTH:
if (is_dp_running(a))
lua_pushnil(L);
else
lua_pushinteger(L, img_depth(a));
break;
case P_TRANSFORM:
lua_pushinteger(L, img_transform(a));
break;
/* now follow all image_dict entries */
case P_FILENAME:
if (img_filename(d) == NULL || strlen(img_filename(d)) == 0)
lua_pushnil(L);
else
lua_pushstring(L, img_filename(d));
break;
case P_VISIBLEFILENAME:
if (img_visiblefilename(d) == NULL
|| strlen(img_visiblefilename(d)) == 0)
lua_pushnil(L);
else
lua_pushstring(L, img_visiblefilename(d));
break;
case P_FILEPATH:
if (img_filepath(d) == NULL || strlen(img_filepath(d)) == 0)
lua_pushnil(L);
else
lua_pushstring(L, img_filepath(d));
break;
case P_ATTR:
if (img_attr(d) == NULL || strlen(img_attr(d)) == 0)
lua_pushnil(L);
else
lua_pushstring(L, img_attr(d));
break;
case P_PAGE:
if (img_pagename(d) != NULL && strlen(img_pagename(d)) != 0)
lua_pushstring(L, img_pagename(d));
else
lua_pushinteger(L, img_pagenum(d));
break;
case P_TOTALPAGES:
lua_pushinteger(L, img_totalpages(d));
break;
case P_XSIZE: /* Modify by /Rotate only for output */
if ((img_rotation(d) & 1) == 0)
lua_pushinteger(L, img_xsize(d));
else
lua_pushinteger(L, img_ysize(d));
break;
case P_YSIZE: /* Modify by /Rotate only for output */
if ((img_rotation(d) & 1) == 0)
lua_pushinteger(L, img_ysize(d));
else
lua_pushinteger(L, img_xsize(d));
break;
case P_XRES:
lua_pushinteger(L, img_xres(d));
break;
case P_YRES:
lua_pushinteger(L, img_yres(d));
break;
case P_ROTATION:
lua_pushinteger(L, img_rotation(d));
break;
case P_COLORSPACE:
if (img_colorspace(d) == 0)
lua_pushnil(L);
else
lua_pushinteger(L, img_colorspace(d));
break;
case P_COLORDEPTH:
if (img_colordepth(d) == 0)
lua_pushnil(L);
else
lua_pushinteger(L, img_colordepth(d));
break;
case P_IMAGETYPE:
j = img_type(d);
if (j >= 0 && j <= imgtype_max) {
if (j == IMG_TYPE_NONE)
lua_pushnil(L);
else
lua_pushstring(L, imgtype_s[j]);
} else
assert(0);
break;
case P_PAGEBOX:
j = img_pagebox(d);
if (j >= 0 && j <= pagebox_max) {
if (j == PDF_BOX_SPEC_NONE)
lua_pushnil(L);
else
lua_pushstring(L, pdfboxspec_s[j]);
} else
assert(0);
break;
case P_BBOX:
if (!img_is_bbox(d)) {
img_bbox(d)[0] = img_xorig(d);
img_bbox(d)[1] = img_yorig(d);
img_bbox(d)[2] = img_xorig(d) + img_xsize(d);
img_bbox(d)[3] = img_yorig(d) + img_ysize(d);
}
lua_newtable(L);
lua_pushinteger(L, 1);
lua_pushinteger(L, img_bbox(d)[0]);
lua_settable(L, -3);
lua_pushinteger(L, 2);
lua_pushinteger(L, img_bbox(d)[1]);
lua_settable(L, -3);
lua_pushinteger(L, 3);
lua_pushinteger(L, img_bbox(d)[2]);
lua_settable(L, -3);
lua_pushinteger(L, 4);
lua_pushinteger(L, img_bbox(d)[3]);
lua_settable(L, -3);
break;
case P_OBJNUM:
if (img_objnum(d) == 0)
lua_pushnil(L);
else
lua_pushinteger(L, img_objnum(d));
break;
case P_INDEX:
if (img_index(d) == 0)
lua_pushnil(L);
else
lua_pushinteger(L, img_index(d));
break;
case P_STREAM:
if (img_type(d) != IMG_TYPE_PDFSTREAM || img_pdfstream_ptr(d) == NULL
|| img_pdfstream_stream(d) == NULL
|| strlen(img_pdfstream_stream(d)) == 0)
lua_pushnil(L);
else
lua_pushstring(L, img_pdfstream_stream(d));
break;
default:
assert(0);
} /* v u ... */
}
static void lua_to_image(lua_State * L, image * a, image_dict * d)
{
int i, t;
const char *s;
s = lua_tostring(L,-2);
t = lua_type(L, -1);
if (lua_key_eq(s,width)) {
if (t == LUA_TNIL) {
set_wd_running(a);
} else if (t == LUA_TNUMBER) {
img_width(a) = (int) lua_roundnumber(L, -1);
} else if (t == LUA_TSTRING) {
img_width(a) = dimen_to_number(L, lua_tostring(L, -1));
} else {
luaL_error(L, "image.width needs integer or nil value or dimension string");
}
} else if (lua_key_eq(s,height)) {
if (t == LUA_TNIL) {
set_ht_running(a);
} else if (t == LUA_TNUMBER) {
img_height(a) = (int) lua_roundnumber(L, -1);
} else if (t == LUA_TSTRING) {
img_height(a) = dimen_to_number(L, lua_tostring(L, -1));
} else {
luaL_error(L, "image.height needs integer or nil value or dimension string");
}
} else if (lua_key_eq(s,depth)) {
if (t == LUA_TNIL) {
set_dp_running(a);
} else if (t == LUA_TNUMBER) {
img_depth(a) = (int) lua_roundnumber(L, -1);
} else if (t == LUA_TSTRING) {
img_depth(a) = dimen_to_number(L, lua_tostring(L, -1));
} else {
luaL_error(L, "image.depth needs integer or nil value or dimension string");
}
} else if (lua_key_eq(s,transform)) {
if (t == LUA_TNUMBER) {
img_transform(a) = (int) lua_tointeger(L, -1);
} else {
luaL_error(L, "image.transform needs integer value");
}
} else if (lua_key_eq(s,filename)) {
if (img_state(d) >= DICT_FILESCANNED) {
luaL_error(L, "image.filename is now read-only");
} else if (img_type(d) == IMG_TYPE_PDFSTREAM) {
luaL_error(L, "image.filename can't be used with image.stream");
} else if (t == LUA_TSTRING) {
xfree(img_filename(d));
img_filename(d) = xstrdup(lua_tostring(L, -1));
} else {
luaL_error(L, "image.filename needs string value");
}
} else if (lua_key_eq(s,visiblefilename)) {
if (img_state(d) >= DICT_FILESCANNED) {
luaL_error(L, "image.visiblefilename is now read-only");
} else if (img_type(d) == IMG_TYPE_PDFSTREAM) {
luaL_error(L, "image.visiblefilename can't be used with image.stream");
} else if (t == LUA_TSTRING) {
xfree(img_visiblefilename(d));
img_visiblefilename(d) = xstrdup(lua_tostring(L, -1));
} else {
luaL_error(L, "image.visiblefilename needs string value");
}
} else if (lua_key_eq(s,attr)) {
if (img_state(d) >= DICT_FILESCANNED) {
luaL_error(L, "image.attr is now read-only");
} else if (t == LUA_TSTRING) {
xfree(img_attr(d));
img_attr(d) = xstrdup(lua_tostring(L, -1));
} else if (t == LUA_TNIL) {
xfree(img_attr(d));
} else {
luaL_error(L, "image.attr needs string or nil value");
}
} else if (lua_key_eq(s,page)) {
if (img_state(d) >= DICT_FILESCANNED) {
luaL_error(L, "image.page is now read-only");
} else if (t == LUA_TSTRING) {
xfree(img_pagename(d));
img_pagename(d) = xstrdup(lua_tostring(L, -1));
img_pagenum(d) = 0;
} else if (t == LUA_TNUMBER) {
img_pagenum(d) = (int) lua_tointeger(L, -1);
xfree(img_pagename(d));
} else {
luaL_error(L, "image.page needs integer or string value");
}
} else if (lua_key_eq(s,colorspace)) {
if (img_state(d) >= DICT_FILESCANNED) {
luaL_error(L, "image.colorspace is now read-only");
} else if (t == LUA_TNIL) {
img_colorspace(d) = 0;
} else if (t == LUA_TNUMBER) {
img_colorspace(d) = (int) lua_tointeger(L, -1);
} else {
luaL_error(L, "image.colorspace needs integer or nil value");
}
} else if (lua_key_eq(s,pagebox)) {
if (img_state(d) >= DICT_FILESCANNED) {
luaL_error(L, "image.pagebox is now read-only");
} else if (t == LUA_TNIL) {
img_pagebox(d) = PDF_BOX_SPEC_MEDIA;
} else if (t == LUA_TNUMBER) {
i = lua_tointeger(L,-1);
if (i < 0 || i >= img_pageboxes_max) {
img_pagebox(d) = PDF_BOX_SPEC_MEDIA;
} else {
img_pagebox(d) = i;
}
} else if (t == LUA_TSTRING) {
img_pagebox(d) = PDF_BOX_SPEC_MEDIA;
for (i = 0; i < img_pageboxes_max; i++) {
lua_rawgeti(L, LUA_REGISTRYINDEX, img_pageboxes[i]);
if (lua_rawequal(L,-1,-2)) {
img_pagebox(d) = i;
lua_pop(L, 1);
break;
} else {
lua_pop(L, 1);
}
}
} else {
luaL_error(L, "image.pagebox needs string, number or nil value");
}
} else if (lua_key_eq(s,keepopen)) {
if (img_state(d) >= DICT_FILESCANNED) {
luaL_error(L, "image.keepopen is now read-only");
} else if (t != LUA_TBOOLEAN) {
luaL_error(L, "image.bbox needs boolean value");
} else {
img_keepopen(d) = lua_toboolean(L, -1);
}
} else if (lua_key_eq(s,bbox)) {
if (img_state(d) >= DICT_FILESCANNED) {
luaL_error(L, "image.bbox is now read-only");
} else if (t != LUA_TTABLE) {
luaL_error(L, "image.bbox needs table value");
} else if (lua_rawlen(L, -1) != 4) {
luaL_error(L, "image.bbox table must have exactly 4 elements");
} else {
for (i = 1; i <= 4; i++) { /* v k t ... */
lua_pushinteger(L, i); /* idx v k t ... */
lua_gettable(L, -2); /* int v k t ... */
t = lua_type(L, -1);
if (t == LUA_TNUMBER) {
img_bbox(d)[i - 1] = (int) lua_roundnumber(L, -1);
} else if (t == LUA_TSTRING) {
img_bbox(d)[i - 1] = dimen_to_number(L, lua_tostring(L, -1));
} else {
luaL_error(L, "image.bbox table needs integer value or dimension string elements");
}
lua_pop(L, 1); /* v k t ... */
}
img_set_bbox(d);
}
} else if (lua_key_eq(s,stream)) {
if (img_filename(d) != NULL) {
luaL_error(L, "image.stream can't be used with image.filename");
} else if (img_state(d) >= DICT_FILESCANNED) {
luaL_error(L, "image.stream is now read-only");
} else {
if (img_pdfstream_ptr(d) == NULL) {
new_img_pdfstream_struct(d);
}
xfree(img_pdfstream_stream(d));
img_pdfstream_stream(d) = xstrdup(lua_tostring(L, -1));
img_type(d) = IMG_TYPE_PDFSTREAM;
}
} else {
luaL_error(L, "image.%s can not be set", s);
}
}
static int m_img_get(lua_State * L)
{
int j;
const char *s;
image **a = (image **) luaL_checkudata(L, 1, TYPE_IMG); /* k u */
image_dict *d = img_dict(*a);
if (d == NULL) {
luaL_error(L, "invalid image dictionary");
}
s = lua_tostring(L, 2);
if (lua_key_eq(s,width)) {
if (is_wd_running(*a)) {
lua_pushnil(L);
} else {
lua_pushinteger(L, img_width(*a));
}
} else if (lua_key_eq(s,height)) {
if (is_ht_running(*a)) {
lua_pushnil(L);
} else {
lua_pushinteger(L, img_height(*a));
}
} else if (lua_key_eq(s,depth)) {
if (is_dp_running(*a)) {
lua_pushnil(L);
} else {
lua_pushinteger(L, img_depth(*a));
}
} else if (lua_key_eq(s,transform)) {
lua_pushinteger(L, img_transform(*a));
} else if (lua_key_eq(s,filename)) {
if (img_filename(d) == NULL || strlen(img_filename(d)) == 0) {
lua_pushnil(L);
} else {
lua_pushstring(L, img_filename(d));
}
} else if (lua_key_eq(s,visiblefilename)) {
if (img_visiblefilename(d) == NULL || strlen(img_visiblefilename(d)) == 0) {
lua_pushnil(L);
} else {
lua_pushstring(L, img_visiblefilename(d));
}
} else if (lua_key_eq(s,keepopen)) {
lua_pushboolean(L, img_keepopen(d));
} else if (lua_key_eq(s,filepath)) {
if (img_filepath(d) == NULL || strlen(img_filepath(d)) == 0) {
lua_pushnil(L);
} else {
lua_pushstring(L, img_filepath(d));
}
} else if (lua_key_eq(s,attr)) {
if (img_attr(d) == NULL || strlen(img_attr(d)) == 0) {
lua_pushnil(L);
} else {
lua_pushstring(L, img_attr(d));
}
} else if (lua_key_eq(s,page)) {
if (img_pagename(d) != NULL && strlen(img_pagename(d)) != 0) {
lua_pushstring(L, img_pagename(d));
} else {
lua_pushinteger(L, img_pagenum(d));
}
} else if (lua_key_eq(s,pages)) {
lua_pushinteger(L, img_totalpages(d));
} else if (lua_key_eq(s,xsize)) {
if ((img_rotation(d) & 1) == 0) {
lua_pushinteger(L, img_xsize(d));
} else {
lua_pushinteger(L, img_ysize(d));
}
} else if (lua_key_eq(s,ysize)) {
if ((img_rotation(d) & 1) == 0) {
lua_pushinteger(L, img_ysize(d));
} else {
lua_pushinteger(L, img_xsize(d));
}
} else if (lua_key_eq(s,xres)) {
lua_pushinteger(L, img_xres(d));
} else if (lua_key_eq(s,yres)) {
lua_pushinteger(L, img_yres(d));
} else if (lua_key_eq(s,rotation)) {
lua_pushinteger(L, img_rotation(d));
} else if (lua_key_eq(s,colorspace)) {
if (img_colorspace(d) == 0) {
lua_pushnil(L);
} else {
lua_pushinteger(L, img_colorspace(d));
}
} else if (lua_key_eq(s,colordepth)) {
if (img_colordepth(d) == 0) {
lua_pushnil(L);
} else {
lua_pushinteger(L, img_colordepth(d));
}
} else if (lua_key_eq(s,imagetype)) {
j = img_type(d);
if (j >= 0 && j <= img_types_max) {
if (j == IMG_TYPE_NONE) {
lua_pushnil(L);
} else {
lua_pushstring(L, img_types[j]);
}
} else {
lua_pushnil(L);
}
} else if (lua_key_eq(s,pagebox)) {
j = img_pagebox(d);
if (j < 0 || j >= img_pageboxes_max) {
j = 0;
}
lua_push_img_pagebox(L, j);
} else if (lua_key_eq(s,bbox)) {
if (!img_is_bbox(d)) {
img_bbox(d)[0] = img_xorig(d);
img_bbox(d)[1] = img_yorig(d);
img_bbox(d)[2] = img_xorig(d) + img_xsize(d);
img_bbox(d)[3] = img_yorig(d) + img_ysize(d);
}
lua_newtable(L);
lua_pushinteger(L, 1);
lua_pushinteger(L, img_bbox(d)[0]);
lua_settable(L, -3);
lua_pushinteger(L, 2);
lua_pushinteger(L, img_bbox(d)[1]);
lua_settable(L, -3);
lua_pushinteger(L, 3);
lua_pushinteger(L, img_bbox(d)[2]);
lua_settable(L, -3);
lua_pushinteger(L, 4);
lua_pushinteger(L, img_bbox(d)[3]);
lua_settable(L, -3);
} else if (lua_key_eq(s,objnum)) {
if (img_objnum(d) == 0) {
lua_pushnil(L);
} else {
lua_pushinteger(L, img_objnum(d));
}
} else if (lua_key_eq(s,index)) {
if (img_index(d) == 0) {
lua_pushnil(L);
} else {
lua_pushinteger(L, img_index(d));
}
} else if (lua_key_eq(s,stream)) {
if (img_type(d) != IMG_TYPE_PDFSTREAM
|| img_pdfstream_ptr(d) == NULL
|| img_pdfstream_stream(d) == NULL
|| strlen(img_pdfstream_stream(d)) == 0) {
lua_pushnil(L);
} else {
lua_pushstring(L, img_pdfstream_stream(d));
}
} else if (lua_key_eq(s,ref_count)) {
lua_pushinteger(L, img_luaref(d));
} else {
lua_pushnil(L);
}
return 1;
}
void place_img(PDF pdf, image_dict * idict, scaled_whd dim, int transform)
{
/*tex A transformation matrix: */
double a[6];
double xoff, yoff, tmp;
pdfstructure *p = pdf->pstruct;
scaledpos pos = pdf->posstruct->pos;
/*tex The number of digits after the decimal point: */
int r;
int k;
scaledpos tmppos;
pdffloat cm[6];
int groupref;
a[0] = a[3] = 1.0e6;
a[1] = a[2] = 0;
if (img_type(idict) == IMG_TYPE_PDF || img_type(idict) == IMG_TYPE_PDFMEMSTREAM
|| img_type(idict) == IMG_TYPE_PDFSTREAM) {
a[0] /= (double) img_xsize(idict);
a[3] /= (double) img_ysize(idict);
xoff = (double) img_xorig(idict) / (double) img_xsize(idict);
yoff = (double) img_yorig(idict) / (double) img_ysize(idict);
r = 6;
} else {
if (img_type(idict) == IMG_TYPE_PNG) {
groupref = img_group_ref(idict);
if ((groupref > 0) && (pdf->img_page_group_val == 0))
pdf->img_page_group_val = groupref;
}
a[0] /= (double) one_hundred_bp;
a[3] = a[0];
xoff = yoff = 0;
r = 4;
}
if ((transform & 7) > 3) {
/*tex Mirror cases: */
a[0] *= -1;
xoff *= -1;
}
switch ((transform + img_rotation(idict)) & 3) {
case 0:
/*tex No transform. */
break;
case 1:
/*tex rotation over 90 degrees (counterclockwise) */
a[1] = a[0];
a[2] = -a[3];
a[3] = a[0] = 0;
tmp = yoff;
yoff = xoff;
xoff = -tmp;
break;
case 2:
/*tex rotation over 180 degrees (counterclockwise) */
a[0] *= -1;
a[3] *= -1;
xoff *= -1;
yoff *= -1;
break;
case 3:
/*tex rotation over 270 degrees (counterclockwise) */
a[1] = -a[0];
a[2] = a[3];
a[3] = a[0] = 0;
tmp = yoff;
yoff = -xoff;
xoff = tmp;
break;
default:;
}
xoff *= (double) dim.wd;
yoff *= (double) (dim.ht + dim.dp);
a[0] *= (double) dim.wd;
a[1] *= (double) (dim.ht + dim.dp);
a[2] *= (double) dim.wd;
a[3] *= (double) (dim.ht + dim.dp);
a[4] = (double) pos.h - xoff;
a[5] = (double) pos.v - yoff;
k = transform + img_rotation(idict);
if ((transform & 7) > 3)
k++;
switch (k & 3) {
case 0:
/*tex No transform */
break;
case 1:
/*tex rotation over 90 degrees (counterclockwise) */
a[4] += (double) dim.wd;
break;
case 2:
/*tex rotation over 180 degrees (counterclockwise) */
a[4] += (double) dim.wd;
a[5] += (double) (dim.ht + dim.dp);
break;
case 3:
/*tex rotation over 270 degrees (counterclockwise) */
a[5] += (double) (dim.ht + dim.dp);
break;
default:;
}
setpdffloat(cm[0], i64round(a[0]), r);
setpdffloat(cm[1], i64round(a[1]), r);
setpdffloat(cm[2], i64round(a[2]), r);
setpdffloat(cm[3], i64round(a[3]), r);
tmppos.h = round(a[4]);
tmppos.v = round(a[5]);
pdf_goto_pagemode(pdf);
(void) calc_pdfpos(p, tmppos);
cm[4] = p->cm[4];
cm[5] = p->cm[5];
if (pdf->img_page_group_val == 0)
pdf->img_page_group_val = img_group_ref(idict);
pdf_puts(pdf, "q\n");
pdf_print_cm(pdf, cm);
pdf_puts(pdf, "/Im");
pdf_print_int(pdf, img_index(idict));
pdf_print_resname_prefix(pdf);
pdf_puts(pdf, " Do\nQ\n");
addto_page_resources(pdf, obj_type_ximage, img_objnum(idict));
if (img_state(idict) < DICT_OUTIMG)
img_state(idict) = DICT_OUTIMG;
}
scaled_whd scale_img(image_dict * idict, scaled_whd alt_rule, int transform)
{
/*tex size and resolution of image */
int x, y, xr, yr, tmp;
/*tex natural size corresponding to image resolution */
scaled_whd nat;
int default_res;
nat.dp = 0;
nat.wd = 0;
nat.ht = 0;
if (img_nobbox(idict)) {
if (img_is_bbox(idict)) {
x = img_xsize(idict) = img_bbox(idict)[2] - img_bbox(idict)[0];
y = img_ysize(idict) = img_bbox(idict)[3] - img_bbox(idict)[1];
img_xorig(idict) = img_bbox(idict)[0];
img_yorig(idict) = img_bbox(idict)[1];
nat.wd = x;
nat.ht = y;
} else {
normal_error("pdf backend","use boundingbox to pass dimensions");
}
} else {
if ((img_type(idict) == IMG_TYPE_PDF || img_type(idict) == IMG_TYPE_PDFMEMSTREAM
|| img_type(idict) == IMG_TYPE_PDFSTREAM) && img_is_bbox(idict)) {
/*tex dimensions from image.bbox */
x = img_xsize(idict) = img_bbox(idict)[2] - img_bbox(idict)[0];
y = img_ysize(idict) = img_bbox(idict)[3] - img_bbox(idict)[1];
img_xorig(idict) = img_bbox(idict)[0];
img_yorig(idict) = img_bbox(idict)[1];
} else {
/*tex dimensions, resolutions from image file */
x = img_xsize(idict);
y = img_ysize(idict);
}
xr = img_xres(idict);
yr = img_yres(idict);
if (x <= 0 || y <= 0 || xr < 0 || yr < 0)
normal_error("pdf backend","invalid image dimensions");
if (xr > 65535 || yr > 65535) {
xr = 0;
yr = 0;
normal_warning("pdf backend","too large image resolution ignored");
}
if (((transform - img_rotation(idict)) & 1) == 1) {
tmp = x;
x = y;
y = tmp;
tmp = xr;
xr = yr;
yr = tmp;
}
/*tex always for images */
if (img_type(idict) == IMG_TYPE_PDF || img_type(idict) == IMG_TYPE_PDFMEMSTREAM
|| img_type(idict) == IMG_TYPE_PDFSTREAM) {
nat.wd = x;
nat.ht = y;
} else {
default_res = fix_int(pdf_image_resolution, 0, 65535);
if (default_res > 0 && (xr == 0 || yr == 0)) {
xr = default_res;
yr = default_res;
}
if (xr > 0 && yr > 0) {
nat.wd = ext_xn_over_d(one_hundred_inch, x, 100 * xr);
nat.ht = ext_xn_over_d(one_hundred_inch, y, 100 * yr);
} else {
nat.wd = ext_xn_over_d(one_hundred_inch, x, 7200);
nat.ht = ext_xn_over_d(one_hundred_inch, y, 7200);
}
}
}
return tex_scale(nat, alt_rule);
}
void read_img(image_dict * idict)
{
char *filepath = NULL;
int callback_id;
if (img_filename(idict) == NULL) {
normal_error("pdf backend","image file name missing");
}
callback_id = callback_defined(find_image_file_callback);
if (img_filepath(idict) == NULL) {
if (callback_id > 0) {
/*tex We always callback, also for a mem stream. */
if (run_callback(callback_id, "S->S", img_filename(idict),&filepath)) {
if (filepath && (strlen(filepath) > 0)) {
img_filepath(idict) = strdup(filepath);
}
}
}
if (img_filepath(idict) == NULL && (strstr(img_filename(idict),"data:application/pdf,") != NULL)) {
/*tex We need to check here for a pdf memstream. */
img_filepath(idict) = strdup(img_filename(idict));
} else if (callback_id == 0) {
/*tex Otherwise we use kpse but only when we don't callback. */
img_filepath(idict) = kpse_find_file(img_filename(idict), kpse_tex_format, true);
}
if (img_filepath(idict) == NULL) {
/*tex In any case we need a name. */
formatted_error("pdf backend","cannot find image file '%s'", img_filename(idict));
}
}
recorder_record_input(img_filepath(idict));
/*tex A few type checks. */
check_type_by_header(idict);
check_type_by_extension(idict);
/*tex Now we're ready to read the image. */
switch (img_type(idict)) {
case IMG_TYPE_PDFMEMSTREAM:
case IMG_TYPE_PDF:
read_pdf_info(idict);
break;
case IMG_TYPE_PNG:
read_png_info(idict);
break;
case IMG_TYPE_JPG:
read_jpg_info(idict);
break;
case IMG_TYPE_JP2:
read_jp2_info(idict);
break;
case IMG_TYPE_JBIG2:
read_jbig2_info(idict);
break;
default:
img_type(idict) = IMG_TYPE_NONE;
if (pdf_ignore_unknown_images) {
normal_warning("pdf backend","internal error: ignoring unknown image type");
} else {
normal_error("pdf backend","internal error: unknown image type");
}
break;
}
cur_file_name = NULL;
if (img_type(idict) == IMG_TYPE_NONE) {
img_state(idict) = DICT_NEW;
} else if (img_state(idict) < DICT_FILESCANNED) {
img_state(idict) = DICT_FILESCANNED;
}
}
