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hpdf_pages.c
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hpdf_pages.c
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/*
* << Haru Free PDF Library >> -- hpdf_pages.c
*
* URL: http://libharu.org
*
* Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
* Copyright (c) 2007-2009 Antony Dovgal <tony@daylessday.org>
*
* 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.
* It is provided "as is" without express or implied warranty.
*
*/
#include "hpdf_conf.h"
#include "hpdf_utils.h"
#include "hpdf.h"
#include "hpdf_annotation.h"
#include "hpdf_destination.h"
#include "hpdf_3dmeasure.h"
#include "hpdf_exdata.h"
#include "hpdf_u3d.h"
/*----------------------------------------------------------------------------*/
typedef struct _HPDF_PageSizeValue {
HPDF_REAL x;
HPDF_REAL y;
} HPDF_PageSizeValue;
static const HPDF_PageSizeValue HPDF_PREDEFINED_PAGE_SIZES[] = {
{612, 792}, /* HPDF_PAGE_SIZE_LETTER */
{612, 1008}, /* HPDF_PAGE_SIZE_LEGAL */
{(HPDF_REAL)841.89, (HPDF_REAL)1190.551}, /* HPDF_PAGE_SIZE_A3 */
{(HPDF_REAL)595.276, (HPDF_REAL)841.89}, /* HPDF_PAGE_SIZE_A4 */
{(HPDF_REAL)419.528, (HPDF_REAL)595.276}, /* HPDF_PAGE_SIZE_A5 */
{(HPDF_REAL)708.661, (HPDF_REAL)1000.63}, /* HPDF_PAGE_SIZE_B4 */
{(HPDF_REAL)498.898, (HPDF_REAL)708.661}, /* HPDF_PAGE_SIZE_B5 */
{522, 756}, /* HPDF_PAGE_SIZE_EXECUTIVE */
{288, 432}, /* HPDF_PAGE_SIZE_US4x6 */
{288, 576}, /* HPDF_PAGE_SIZE_US4x8 */
{360, 504}, /* HPDF_PAGE_SIZE_US5x7 */
{297, 684} /* HPDF_PAGE_SIZE_COMM10 */
};
static const HPDF_RGBColor DEF_RGB_COLOR = {0, 0, 0};
static const HPDF_CMYKColor DEF_CMYK_COLOR = {0, 0, 0, 0};
static HPDF_STATUS
Pages_BeforeWrite (HPDF_Dict obj);
static HPDF_STATUS
Page_BeforeWrite (HPDF_Dict obj);
static void
Page_OnFree (HPDF_Dict obj);
static HPDF_STATUS
AddResource (HPDF_Page page);
static HPDF_STATUS
AddAnnotation (HPDF_Page page,
HPDF_Annotation annot);
static HPDF_UINT
GetPageCount (HPDF_Dict pages);
static const char * const HPDF_INHERITABLE_ENTRIES[5] = {
"Resources",
"MediaBox",
"CropBox",
"Rotate",
NULL
};
/*----------------------------------------------------------------------------*/
/*----- HPDF_Pages -----------------------------------------------------------*/
HPDF_Pages
HPDF_Pages_New (HPDF_MMgr mmgr,
HPDF_Pages parent,
HPDF_Xref xref)
{
HPDF_STATUS ret = HPDF_OK;
HPDF_Pages pages;
HPDF_PTRACE((" HPDF_Pages_New\n"));
pages = HPDF_Dict_New (mmgr);
if (!pages)
return NULL;
pages->header.obj_class |= HPDF_OSUBCLASS_PAGES;
pages->before_write_fn = Pages_BeforeWrite;
if (HPDF_Xref_Add (xref, pages) != HPDF_OK)
return NULL;
/* add requiered elements */
ret += HPDF_Dict_AddName (pages, "Type", "Pages");
ret += HPDF_Dict_Add (pages, "Kids", HPDF_Array_New (pages->mmgr));
ret += HPDF_Dict_Add (pages, "Count", HPDF_Number_New (pages->mmgr, 0));
if (ret == HPDF_OK && parent)
ret += HPDF_Pages_AddKids (parent, pages);
if (ret != HPDF_OK)
return NULL;
return pages;
}
HPDF_STATUS
HPDF_Pages_AddKids (HPDF_Pages parent,
HPDF_Dict kid)
{
HPDF_Array kids;
HPDF_STATUS ret;
HPDF_PTRACE((" HPDF_Pages_AddKids\n"));
if (HPDF_Dict_GetItem (kid, "Parent", HPDF_OCLASS_DICT))
return HPDF_SetError (parent->error, HPDF_PAGE_CANNOT_SET_PARENT, 0);
if ((ret = HPDF_Dict_Add (kid, "Parent", parent)) != HPDF_OK)
return ret;
kids = (HPDF_Array )HPDF_Dict_GetItem (parent, "Kids", HPDF_OCLASS_ARRAY);
if (!kids)
return HPDF_SetError (parent->error, HPDF_PAGES_MISSING_KIDS_ENTRY, 0);
if (kid->header.obj_class == (HPDF_OCLASS_DICT | HPDF_OSUBCLASS_PAGE)) {
HPDF_PageAttr attr = (HPDF_PageAttr)kid->attr;
attr->parent = parent;
}
return HPDF_Array_Add (kids, kid);
}
HPDF_STATUS
HPDF_Page_InsertBefore (HPDF_Page page,
HPDF_Page target)
{
HPDF_Page parent;
HPDF_Array kids;
HPDF_STATUS ret;
HPDF_PageAttr attr;
HPDF_PTRACE((" HPDF_Page_InsertBefore\n"));
if (!target)
return HPDF_INVALID_PARAMETER;
attr = (HPDF_PageAttr )target->attr;
parent = attr->parent;
if (!parent)
return HPDF_PAGE_CANNOT_SET_PARENT;
if (HPDF_Dict_GetItem (page, "Parent", HPDF_OCLASS_DICT))
return HPDF_SetError (parent->error, HPDF_PAGE_CANNOT_SET_PARENT, 0);
if ((ret = HPDF_Dict_Add (page, "Parent", parent)) != HPDF_OK)
return ret;
kids = (HPDF_Array )HPDF_Dict_GetItem (parent, "Kids", HPDF_OCLASS_ARRAY);
if (!kids)
return HPDF_SetError (parent->error, HPDF_PAGES_MISSING_KIDS_ENTRY, 0);
attr = (HPDF_PageAttr)page->attr;
attr->parent = parent;
return HPDF_Array_Insert (kids, target, page);
}
HPDF_STATUS
Pages_BeforeWrite (HPDF_Dict obj)
{
HPDF_Array kids = (HPDF_Array )HPDF_Dict_GetItem (obj, "Kids",
HPDF_OCLASS_ARRAY);
HPDF_Number count = (HPDF_Number)HPDF_Dict_GetItem (obj, "Count",
HPDF_OCLASS_NUMBER);
HPDF_STATUS ret;
HPDF_PTRACE((" HPDF_Pages_BeforeWrite\n"));
if (!kids)
return HPDF_SetError (obj->error, HPDF_PAGES_MISSING_KIDS_ENTRY, 0);
if (count)
count->value = GetPageCount (obj);
else {
count = HPDF_Number_New (obj->mmgr, GetPageCount (obj));
if (!count)
return HPDF_Error_GetCode (obj->error);
if ((ret = HPDF_Dict_Add (obj, "Count", count)) != HPDF_OK)
return ret;
}
return HPDF_OK;
}
static HPDF_STATUS
Page_BeforeWrite (HPDF_Dict obj)
{
HPDF_STATUS ret;
HPDF_Page page = (HPDF_Page)obj;
HPDF_PageAttr attr = (HPDF_PageAttr)obj->attr;
HPDF_PTRACE((" HPDF_Page_BeforeWrite\n"));
if (attr->gmode == HPDF_GMODE_PATH_OBJECT) {
HPDF_PTRACE((" HPDF_Page_BeforeWrite warning path object is not"
" end\n"));
if ((ret = HPDF_Page_EndPath (page)) != HPDF_OK)
return ret;
}
if (attr->gmode == HPDF_GMODE_TEXT_OBJECT) {
HPDF_PTRACE((" HPDF_Page_BeforeWrite warning text block is not end\n"));
if ((ret = HPDF_Page_EndText (page)) != HPDF_OK)
return ret;
}
if (attr->gstate)
while (attr->gstate->prev) {
if ((ret = HPDF_Page_GRestore (page)) != HPDF_OK)
return ret;
}
return HPDF_OK;
}
static HPDF_UINT
GetPageCount (HPDF_Dict pages)
{
HPDF_UINT i;
HPDF_UINT count = 0;
HPDF_Array kids = (HPDF_Array)HPDF_Dict_GetItem (pages, "Kids",
HPDF_OCLASS_ARRAY);
HPDF_PTRACE((" GetPageCount\n"));
if (!kids)
return 0;
for (i = 0; i < kids->list->count; i++) {
void *obj = HPDF_Array_GetItem (kids, i, HPDF_OCLASS_DICT);
HPDF_Obj_Header *header = (HPDF_Obj_Header *)obj;
if (header->obj_class == (HPDF_OCLASS_DICT | HPDF_OSUBCLASS_PAGES))
count += GetPageCount ((HPDF_Dict)obj);
else if (header->obj_class == (HPDF_OCLASS_DICT | HPDF_OSUBCLASS_PAGE))
count += 1;
}
return count;
}
HPDF_BOOL
HPDF_Pages_Validate (HPDF_Pages pages)
{
HPDF_Obj_Header *header = (HPDF_Obj_Header *)pages;
HPDF_PTRACE((" HPDF_Pages_Validate\n"));
if (!pages || header->obj_class != (HPDF_OCLASS_DICT |
HPDF_OSUBCLASS_PAGES))
return HPDF_FALSE;
return HPDF_TRUE;
}
/*----------------------------------------------------------------------------*/
/*----- HPDF_Page ------------------------------------------------------------*/
HPDF_Page
HPDF_Page_New (HPDF_MMgr mmgr,
HPDF_Xref xref)
{
HPDF_STATUS ret;
HPDF_PageAttr attr;
HPDF_Page page;
HPDF_PTRACE((" HPDF_Page_New\n"));
page = HPDF_Dict_New (mmgr);
if (!page)
return NULL;
page->header.obj_class |= HPDF_OSUBCLASS_PAGE;
page->free_fn = Page_OnFree;
page->before_write_fn = Page_BeforeWrite;
attr = HPDF_GetMem (page->mmgr, sizeof(HPDF_PageAttr_Rec));
if (!attr) {
HPDF_Dict_Free (page);
return NULL;
}
page->attr = attr;
HPDF_MemSet (attr, 0, sizeof(HPDF_PageAttr_Rec));
attr->gmode = HPDF_GMODE_PAGE_DESCRIPTION;
attr->cur_pos = HPDF_ToPoint (0, 0);
attr->text_pos = HPDF_ToPoint (0, 0);
ret = HPDF_Xref_Add (xref, page);
if (ret != HPDF_OK)
return NULL;
attr->gstate = HPDF_GState_New (page->mmgr, NULL);
attr->contents = HPDF_DictStream_New (page->mmgr, xref);
if (!attr->gstate || !attr->contents)
return NULL;
attr->stream = attr->contents->stream;
attr->xref = xref;
/* add requiered elements */
ret += HPDF_Dict_AddName (page, "Type", "Page");
ret += HPDF_Dict_Add (page, "MediaBox", HPDF_Box_Array_New (page->mmgr,
HPDF_ToBox (0, 0, (HPDF_INT16)(HPDF_DEF_PAGE_WIDTH), (HPDF_INT16)(HPDF_DEF_PAGE_HEIGHT))));
ret += HPDF_Dict_Add (page, "Contents", attr->contents);
ret += AddResource (page);
if (ret != HPDF_OK)
return NULL;
return page;
}
static void
Page_OnFree (HPDF_Dict obj)
{
HPDF_PageAttr attr = (HPDF_PageAttr)obj->attr;
HPDF_PTRACE((" HPDF_Page_OnFree\n"));
if (attr) {
if (attr->gstate)
HPDF_GState_Free (obj->mmgr, attr->gstate);
HPDF_FreeMem (obj->mmgr, attr);
}
}
HPDF_STATUS
HPDF_Page_CheckState (HPDF_Page page,
HPDF_UINT mode)
{
if (!page)
return HPDF_INVALID_OBJECT;
if (page->header.obj_class != (HPDF_OSUBCLASS_PAGE | HPDF_OCLASS_DICT))
return HPDF_INVALID_PAGE;
if (!(((HPDF_PageAttr)page->attr)->gmode & mode))
return HPDF_RaiseError (page->error, HPDF_PAGE_INVALID_GMODE, 0);
return HPDF_OK;
}
void*
HPDF_Page_GetInheritableItem (HPDF_Page page,
const char *key,
HPDF_UINT16 obj_class)
{
HPDF_BOOL chk = HPDF_FALSE;
HPDF_INT i = 0;
void * obj;
HPDF_PTRACE((" HPDF_Page_GetInheritableItem\n"));
/* check whether the specified key is valid */
while (HPDF_INHERITABLE_ENTRIES[i]) {
if (HPDF_StrCmp (key, HPDF_INHERITABLE_ENTRIES[i]) == 0) {
chk = HPDF_TRUE;
break;
}
i++;
}
/* the key is not inheritable */
if (chk != HPDF_TRUE) {
HPDF_SetError (page->error, HPDF_INVALID_PARAMETER, 0);
return NULL;
}
obj = HPDF_Dict_GetItem (page, key, obj_class);
/* if resources of the object is NULL, search resources of parent
* pages recursivly
*/
if (!obj) {
HPDF_Pages pages = HPDF_Dict_GetItem (page, "Parent", HPDF_OCLASS_DICT);
while (pages) {
obj = HPDF_Dict_GetItem (page, key, obj_class);
if (obj)
break;
pages = HPDF_Dict_GetItem (pages, "Parent", HPDF_OCLASS_DICT);
}
}
return obj;
}
HPDF_STATUS
AddResource (HPDF_Page page)
{
HPDF_STATUS ret = HPDF_OK;
HPDF_Dict resource;
HPDF_Array procset;
HPDF_PTRACE((" HPDF_Page_AddResource\n"));
resource = HPDF_Dict_New (page->mmgr);
if (!resource)
return HPDF_Error_GetCode (page->error);
/* althoth ProcSet-entry is obsolete, add it to resouce for
* compatibility
*/
ret += HPDF_Dict_Add (page, "Resources", resource);
procset = HPDF_Array_New (page->mmgr);
if (!procset)
return HPDF_Error_GetCode (page->error);
if (HPDF_Dict_Add (resource, "ProcSet", procset) != HPDF_OK)
return HPDF_Error_GetCode (resource->error);
ret += HPDF_Array_Add (procset, HPDF_Name_New (page->mmgr, "PDF"));
ret += HPDF_Array_Add (procset, HPDF_Name_New (page->mmgr, "Text"));
ret += HPDF_Array_Add (procset, HPDF_Name_New (page->mmgr, "ImageB"));
ret += HPDF_Array_Add (procset, HPDF_Name_New (page->mmgr, "ImageC"));
ret += HPDF_Array_Add (procset, HPDF_Name_New (page->mmgr, "ImageI"));
if (ret != HPDF_OK)
return HPDF_Error_GetCode (procset->error);
return HPDF_OK;
}
const char*
HPDF_Page_GetLocalFontName (HPDF_Page page,
HPDF_Font font)
{
HPDF_PageAttr attr = (HPDF_PageAttr )page->attr;
const char *key;
HPDF_PTRACE((" HPDF_Page_GetLocalFontName\n"));
/* whether check font-resource exists. when it does not exists,
* create font-resource
* 2006.07.21 Fixed a problem which may cause a memory leak.
*/
if (!attr->fonts) {
HPDF_Dict resources;
HPDF_Dict fonts;
resources = HPDF_Page_GetInheritableItem (page, "Resources",
HPDF_OCLASS_DICT);
if (!resources)
return NULL;
fonts = HPDF_Dict_New (page->mmgr);
if (!fonts)
return NULL;
if (HPDF_Dict_Add (resources, "Font", fonts) != HPDF_OK)
return NULL;
attr->fonts = fonts;
}
/* search font-object from font-resource */
key = HPDF_Dict_GetKeyByObj (attr->fonts, font);
if (!key) {
/* if the font is not registered in font-resource, register font to
* font-resource.
*/
char fontName[HPDF_LIMIT_MAX_NAME_LEN + 1];
char *ptr;
char *end_ptr = fontName + HPDF_LIMIT_MAX_NAME_LEN;
ptr = (char *)HPDF_StrCpy (fontName, "F", end_ptr);
HPDF_IToA (ptr, attr->fonts->list->count + 1, end_ptr);
if (HPDF_Dict_Add (attr->fonts, fontName, font) != HPDF_OK)
return NULL;
key = HPDF_Dict_GetKeyByObj (attr->fonts, font);
}
return key;
}
HPDF_Box
HPDF_Page_GetMediaBox (HPDF_Page page)
{
HPDF_Box media_box = {0, 0, 0, 0};
HPDF_PTRACE((" HPDF_Page_GetMediaBox\n"));
if (HPDF_Page_Validate (page)) {
HPDF_Array array = HPDF_Page_GetInheritableItem (page, "MediaBox",
HPDF_OCLASS_ARRAY);
if (array) {
HPDF_Real r;
r = HPDF_Array_GetItem (array, 0, HPDF_OCLASS_REAL);
if (r)
media_box.left = r->value;
r = HPDF_Array_GetItem (array, 1, HPDF_OCLASS_REAL);
if (r)
media_box.bottom = r->value;
r = HPDF_Array_GetItem (array, 2, HPDF_OCLASS_REAL);
if (r)
media_box.right = r->value;
r = HPDF_Array_GetItem (array, 3, HPDF_OCLASS_REAL);
if (r)
media_box.top = r->value;
HPDF_CheckError (page->error);
} else HPDF_RaiseError (page->error, HPDF_PAGE_CANNOT_FIND_OBJECT, 0);
}
return media_box;
}
const char*
HPDF_Page_GetXObjectName (HPDF_Page page,
HPDF_XObject xobj)
{
HPDF_PageAttr attr = (HPDF_PageAttr )page->attr;
const char *key;
HPDF_PTRACE((" HPDF_Page_GetXObjectName\n"));
if (!attr->xobjects) {
HPDF_Dict resources;
HPDF_Dict xobjects;
resources = HPDF_Page_GetInheritableItem (page, "Resources",
HPDF_OCLASS_DICT);
if (!resources)
return NULL;
xobjects = HPDF_Dict_New (page->mmgr);
if (!xobjects)
return NULL;
if (HPDF_Dict_Add (resources, "XObject", xobjects) != HPDF_OK)
return NULL;
attr->xobjects = xobjects;
}
/* search xobject-object from xobject-resource */
key = HPDF_Dict_GetKeyByObj (attr->xobjects, xobj);
if (!key) {
/* if the xobject is not registered in xobject-resource, register
* xobject to xobject-resource.
*/
char xobj_name[HPDF_LIMIT_MAX_NAME_LEN + 1];
char *ptr;
char *end_ptr = xobj_name + HPDF_LIMIT_MAX_NAME_LEN;
ptr = (char *)HPDF_StrCpy (xobj_name, "X", end_ptr);
HPDF_IToA (ptr, attr->xobjects->list->count + 1, end_ptr);
if (HPDF_Dict_Add (attr->xobjects, xobj_name, xobj) != HPDF_OK)
return NULL;
key = HPDF_Dict_GetKeyByObj (attr->xobjects, xobj);
}
return key;
}
const char*
HPDF_Page_GetExtGStateName (HPDF_Page page,
HPDF_ExtGState state)
{
HPDF_PageAttr attr = (HPDF_PageAttr )page->attr;
const char *key;
HPDF_PTRACE((" HPDF_Page_GetExtGStateName\n"));
if (!attr->ext_gstates) {
HPDF_Dict resources;
HPDF_Dict ext_gstates;
resources = HPDF_Page_GetInheritableItem (page, "Resources",
HPDF_OCLASS_DICT);
if (!resources)
return NULL;
ext_gstates = HPDF_Dict_New (page->mmgr);
if (!ext_gstates)
return NULL;
if (HPDF_Dict_Add (resources, "ExtGState", ext_gstates) != HPDF_OK)
return NULL;
attr->ext_gstates = ext_gstates;
}
/* search ext_gstate-object from ext_gstate-resource */
key = HPDF_Dict_GetKeyByObj (attr->ext_gstates, state);
if (!key) {
/* if the ext-gstate is not registered in ext-gstate resource, register
* to ext-gstate resource.
*/
char ext_gstate_name[HPDF_LIMIT_MAX_NAME_LEN + 1];
char *ptr;
char *end_ptr = ext_gstate_name + HPDF_LIMIT_MAX_NAME_LEN;
ptr = (char *)HPDF_StrCpy (ext_gstate_name, "E", end_ptr);
HPDF_IToA (ptr, attr->ext_gstates->list->count + 1, end_ptr);
if (HPDF_Dict_Add (attr->ext_gstates, ext_gstate_name, state) != HPDF_OK)
return NULL;
key = HPDF_Dict_GetKeyByObj (attr->ext_gstates, state);
}
return key;
}
const char*
HPDF_Page_GetShadingName (HPDF_Page page,
HPDF_Shading shading)
{
HPDF_PageAttr attr = (HPDF_PageAttr )page->attr;
const char *key;
HPDF_PTRACE((" HPDF_Page_GetShadingName\n"));
if (!attr->shadings) {
HPDF_Dict resources;
HPDF_Dict shadings;
resources = HPDF_Page_GetInheritableItem (page, "Resources",
HPDF_OCLASS_DICT);
if (!resources)
return NULL;
shadings = HPDF_Dict_New (page->mmgr);
if (!shadings)
return NULL;
if (HPDF_Dict_Add (resources, "Shading", shadings) != HPDF_OK)
return NULL;
attr->shadings = shadings;
}
/* search shading-object from shading-resource */
key = HPDF_Dict_GetKeyByObj (attr->shadings, shading);
if (!key) {
/* if the shading is not registered in shadings resource, register
* to shadings resource.
*/
char shading_str[HPDF_LIMIT_MAX_NAME_LEN + 1];
char *ptr;
char *end_ptr = shading_str + HPDF_LIMIT_MAX_NAME_LEN;
ptr = (char *)HPDF_StrCpy (shading_str, "Sh", end_ptr);
HPDF_IToA (ptr, attr->shadings->list->count, end_ptr);
if (HPDF_Dict_Add (attr->shadings, shading_str, shading) != HPDF_OK)
return NULL;
key = HPDF_Dict_GetKeyByObj (attr->shadings, shading);
}
return key;
}
static HPDF_STATUS
AddAnnotation (HPDF_Page page,
HPDF_Annotation annot)
{
HPDF_Array array;
HPDF_STATUS ret = HPDF_OK;
HPDF_PTRACE((" HPDF_Pages\n"));
/* find "Annots" entry */
array = HPDF_Dict_GetItem (page, "Annots", HPDF_OCLASS_ARRAY);
if (!array) {
array = HPDF_Array_New (page->mmgr);
if (!array)
return HPDF_Error_GetCode (page->error);
ret = HPDF_Dict_Add (page, "Annots", array);
if (ret != HPDF_OK)
return ret;
}
if ((ret = HPDF_Array_Add (array, annot)) != HPDF_OK)
return ret;
/* Add Parent to the annotation */
ret = HPDF_Dict_Add( annot, "P", page);
return ret;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_TextWidth (HPDF_Page page,
const char *text)
{
HPDF_PageAttr attr;
HPDF_TextWidth tw;
HPDF_REAL ret = 0;
HPDF_UINT len = HPDF_StrLen(text, HPDF_LIMIT_MAX_STRING_LEN + 1);
HPDF_PTRACE((" HPDF_Page_TextWidth\n"));
if (!HPDF_Page_Validate (page) || len == 0)
return 0;
attr = (HPDF_PageAttr )page->attr;
/* no font exists */
if (!attr->gstate->font) {
HPDF_RaiseError (page->error, HPDF_PAGE_FONT_NOT_FOUND, 0);
return 0;
}
tw = HPDF_Font_TextWidth (attr->gstate->font, (HPDF_BYTE *)text, len);
ret += attr->gstate->word_space * tw.numspace;
ret += tw.width * attr->gstate->font_size / 1000;
ret += attr->gstate->char_space * tw.numchars;
HPDF_CheckError (page->error);
return ret;
}
HPDF_EXPORT(HPDF_UINT)
HPDF_Page_MeasureText (HPDF_Page page,
const char *text,
HPDF_REAL width,
HPDF_BOOL wordwrap,
HPDF_REAL *real_width)
{
HPDF_PageAttr attr;
HPDF_UINT len = HPDF_StrLen(text, HPDF_LIMIT_MAX_STRING_LEN + 1);
HPDF_UINT ret;
if (!HPDF_Page_Validate (page) || len == 0)
return 0;
attr = (HPDF_PageAttr )page->attr;
HPDF_PTRACE((" HPDF_Page_MeasureText\n"));
/* no font exists */
if (!attr->gstate->font) {
HPDF_RaiseError (page->error, HPDF_PAGE_FONT_NOT_FOUND, 0);
return 0;
}
ret = HPDF_Font_MeasureText (attr->gstate->font, (HPDF_BYTE *)text, len, width,
attr->gstate->font_size, attr->gstate->char_space,
attr->gstate->word_space, wordwrap, real_width);
HPDF_CheckError (page->error);
return ret;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_GetWidth (HPDF_Page page)
{
return HPDF_Page_GetMediaBox (page).right;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_GetHeight (HPDF_Page page)
{
return HPDF_Page_GetMediaBox (page).top;
}
HPDF_EXPORT(HPDF_Font)
HPDF_Page_GetCurrentFont (HPDF_Page page)
{
HPDF_PTRACE((" HPDF_Page_GetFontName\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return attr->gstate->font;
} else
return NULL;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_GetCurrentFontSize (HPDF_Page page)
{
HPDF_PTRACE((" HPDF_Page_GetCurrentFontSize\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return (attr->gstate->font) ? attr->gstate->font_size : 0;
} else
return 0;
}
HPDF_EXPORT(HPDF_TransMatrix)
HPDF_Page_GetTransMatrix (HPDF_Page page)
{
HPDF_TransMatrix DEF_MATRIX = {1, 0, 0, 1, 0, 0};
HPDF_PTRACE((" HPDF_Page_GetTransMatrix\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return attr->gstate->trans_matrix;
} else
return DEF_MATRIX;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_GetLineWidth (HPDF_Page page)
{
HPDF_PTRACE((" HPDF_Page_GetLineWidth\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return attr->gstate->line_width;
} else
return HPDF_DEF_LINEWIDTH;
}
HPDF_EXPORT(HPDF_LineCap)
HPDF_Page_GetLineCap (HPDF_Page page)
{
HPDF_PTRACE((" HPDF_Page_GetLineCap\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return attr->gstate->line_cap;
} else
return HPDF_DEF_LINECAP;
}
HPDF_EXPORT(HPDF_LineJoin)
HPDF_Page_GetLineJoin (HPDF_Page page)
{
HPDF_PTRACE((" HPDF_Page_GetLineJoin\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return attr->gstate->line_join;
} else
return HPDF_DEF_LINEJOIN;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_GetMiterLimit (HPDF_Page page)
{
HPDF_PTRACE((" HPDF_Page_GetMiterLimit\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return attr->gstate->miter_limit;
} else
return HPDF_DEF_MITERLIMIT;
}
HPDF_EXPORT(HPDF_DashMode)
HPDF_Page_GetDash (HPDF_Page page)
{
HPDF_DashMode mode = {{0, 0, 0, 0, 0, 0, 0, 0}, 0, 0};
HPDF_PTRACE((" HPDF_Page_GetDash\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
mode = attr->gstate->dash_mode;
}
return mode;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_GetFlat (HPDF_Page page)
{
HPDF_PTRACE((" HPDF_Page_GetFlat\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return attr->gstate->flatness;
} else
return HPDF_DEF_FLATNESS;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_GetWordSpace (HPDF_Page page)
{
HPDF_PTRACE((" HPDF_Page_GetWordSpace\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return attr->gstate->word_space;
} else
return HPDF_DEF_WORDSPACE;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_GetCharSpace (HPDF_Page page)
{
HPDF_PTRACE((" HPDF_Page_GetCharSpace\n"));
if (HPDF_Page_Validate (page)) {
HPDF_PageAttr attr = (HPDF_PageAttr)page->attr;
return attr->gstate->char_space;
} else
return HPDF_DEF_CHARSPACE;
}
HPDF_EXPORT(HPDF_REAL)
HPDF_Page_GetHorizontalScalling (HPDF_Page page)
{