static int getPageInfo(lua_State *L) {
DjvuDocument *doc = (DjvuDocument*) luaL_checkudata(L, 1, "djvudocument");
int pageno = luaL_checkint(L, 2);
ddjvu_page_t *djvu_page;
int page_width, page_height, page_dpi;
double page_gamma;
ddjvu_page_type_t page_type;
char *page_type_str;
djvu_page = ddjvu_page_create_by_pageno(doc->doc_ref, pageno - 1);
if (! djvu_page)
return luaL_error(L, "cannot create djvu_page #%d", pageno);
while (! ddjvu_page_decoding_done(djvu_page))
handle(L, doc->context, TRUE);
page_width = ddjvu_page_get_width(djvu_page);
lua_pushnumber(L, page_width);
page_height = ddjvu_page_get_height(djvu_page);
lua_pushnumber(L, page_height);
page_dpi = ddjvu_page_get_resolution(djvu_page);
lua_pushnumber(L, page_dpi);
page_gamma = ddjvu_page_get_gamma(djvu_page);
lua_pushnumber(L, page_gamma);
page_type = ddjvu_page_get_type(djvu_page);
switch (page_type) {
case DDJVU_PAGETYPE_UNKNOWN:
page_type_str = "UNKNOWN";
break;
case DDJVU_PAGETYPE_BITONAL:
page_type_str = "BITONAL";
break;
case DDJVU_PAGETYPE_PHOTO:
page_type_str = "PHOTO";
break;
case DDJVU_PAGETYPE_COMPOUND:
page_type_str = "COMPOUND";
break;
default:
page_type_str = "INVALID";
break;
}
lua_pushstring(L, page_type_str);
ddjvu_page_release(djvu_page);
return 5;
}
/* write out nice info on the message,
* and store in *user* data the info on progress.
* */
int
process_message(ddjvu_message_t *message)
{
#if 0
ddjvu_context_t* context= message->m_any.context;
#endif
if (! message)
return(-1);
#if DEBUG
printf("*** %s: %s.\n",__FUNCTION__, message_tag_name(message->m_any.tag));
#endif
switch (message->m_any.tag){
case DDJVU_DOCINFO:
{
ddjvu_document_t* document= message->m_any.document;
/* ddjvu_document_decoding_status is set by libdjvu! */
/* we have some info on the document */
LoadContext *lc = (LoadContext *) ddjvu_document_get_user_data(document);
lc->pages = ddjvu_document_get_pagenum(document);
#if DEBUG
printf("the doc has %d pages\n", ddjvu_document_get_pagenum(document));
#endif
break;
}
case DDJVU_CHUNK:
#if DEBUG
printf("the name of the chunk is: %s\n", message->m_chunk.chunkid);
#endif
break;
case DDJVU_RELAYOUT:
case DDJVU_PAGEINFO:
{
#if 0
ddjvu_page_t* page = message->m_any.page;
page_info* info = ddjvu_page_get_user_data(page);
printf("page decoding status: %d %s%s%s\n",
ddjvu_page_decoding_status(page),
status_color, status_name(ddjvu_page_decoding_status(page)), color_reset);
printf("the page LAYOUT changed: width x height: %d x %d @ %d dpi. Version %d, type %d\n",
// printf("page info:\n width x height: %d x %d @ %d dpi, version %d, type %d\n",
ddjvu_page_get_width(page),
ddjvu_page_get_height(page),
ddjvu_page_get_resolution(page),
ddjvu_page_get_version(page),
/* DDJVU_PAGETYPE_BITONAL */
ddjvu_page_get_type(page));
info->info = 1;
#endif
break;
}
case DDJVU_REDISPLAY:
{
#if 0
ddjvu_page_t* page = message->m_any.page;
page_info* info = ddjvu_page_get_user_data(page);
printf("the page can/should be REDISPLAYED\n");
info->display = 1;
#endif
break;
}
case DDJVU_PROGRESS:
#if DEBUG
printf("PROGRESS:\n");
#endif
break;
case DDJVU_ERROR:
printf("simply ERROR!\n message:\t%s\nfunction:\t%s(file %s)\nlineno:\t%d\n",
message->m_error.message,
message->m_error.function,
message->m_error.filename,
message->m_error.lineno);
break;
case DDJVU_INFO:
#if DEBUG
printf("INFO: %s!\n", message->m_info.message);
#endif
break;
default:
printf("unexpected\n");
};
return(message->m_any.tag);
}
gint32
load_djvu (const gchar * filename,
GimpRunMode runmode,
gboolean preview)
{
GimpPixelRgn rgn_in;
GimpDrawable *drawable;
gint32 volatile image_ID;
gint32 layer_ID;
int x1, y1, x2, y2, width, height;
unsigned char *src = NULL;
int file_length;
ctx = ddjvu_context_create("gimp");
//
doc = ddjvu_document_create_by_filename(ctx,filename, TRUE);
while (! ddjvu_document_decoding_done(doc))
handle(TRUE);
i = ddjvu_document_get_pagenum(doc);
dialog( &pageno ,i);
//processing the page
page = ddjvu_page_create_by_pageno(doc, pageno-1);
while (! ddjvu_page_decoding_done(page))
handle(TRUE);
if (ddjvu_page_decoding_error(page))
{
fprintf(stderr,"unexpected error ");
exit(10);
}
// ddjvu variables
ddjvu_rect_t prect;
ddjvu_rect_t rrect;
ddjvu_format_style_t style;
ddjvu_render_mode_t mode;
ddjvu_format_t *fmt;
int iw = ddjvu_page_get_width(page);
int ih = ddjvu_page_get_height(page);
int dpi = ddjvu_page_get_resolution(page);
ddjvu_page_type_t type = ddjvu_page_get_type(page);
char *image = 0;
int rowsize;
//end of ddjvu variables
style= DDJVU_FORMAT_RGB24;
mode=DDJVU_RENDER_COLOR;
fmt = ddjvu_format_create(style, 0, 0);
ddjvu_format_set_row_order(fmt, 1);
prect.w = iw;
prect.h = ih;
prect.x = 0;
prect.y = 0;
flag_scale=150;
prect.w = (unsigned int) (iw * flag_scale) / dpi;
prect.h = (unsigned int) (ih * flag_scale) / dpi;
rrect = prect;
rowsize = (rrect.w *3);
image = (char*)malloc(rowsize * rrect.h);
//generating page
ddjvu_page_render(page, mode, &prect, &rrect, fmt, rowsize, image);
ddjvu_page_release(page);
char *s =image;
/* create output image */
width = prect.w;
height = prect.h;
x1 = 0;
y1 = 0;
x2 = prect.w;
y2 = prect.h;
image_ID = gimp_image_new (width, height, GIMP_RGB);
layer_ID = gimp_layer_new (image_ID, _("Background"),
width, height, GIMP_RGB, 100, GIMP_NORMAL_MODE);
gimp_image_add_layer (image_ID, layer_ID, 0);
drawable = gimp_drawable_get (layer_ID); // initializes the drawable
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
gimp_pixel_rgn_init (&rgn_in, drawable, x1, y1,
x2 - x1, y2 - y1, TRUE, TRUE);
gimp_pixel_rgn_set_rect (&rgn_in, image, 0, 0, width, height);
//g_free (buf);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, x2 - x1, y2 - y1);
gimp_image_set_filename (image_ID, filename);
return image_ID;
image =NULL;
//not handling any error
if (doc)
ddjvu_document_release(doc);
if (ctx)
ddjvu_context_release(ctx);
}
/*
** Returns 0 for success, negative number for error code.
** bpp can be 24 or 8.
**
*/
int bmpdjvu_djvufile_to_bmp(WILLUSBITMAP *bmp,char *infile,int pageno,
int dpi,int bpp,FILE *out)
{
ddjvu_context_t *ctx;
ddjvu_document_t *doc;
ddjvu_page_t *page;
/* ddjvu_page_type_t type; */
ddjvu_rect_t prect;
ddjvu_rect_t rrect;
ddjvu_format_style_t style;
ddjvu_render_mode_t mode;
ddjvu_format_t *fmt;
int i,iw,ih,idpi,status;
ctx=ddjvu_context_create("bmpdjvu_djvufile_to_bmp");
if (ctx==NULL)
{
nprintf(out,"Cannot create djvu context.\n");
return(-1);
}
doc=ddjvu_document_create_by_filename(ctx,infile,1);
if (doc==NULL)
{
ddjvu_context_release(ctx);
nprintf(out,"Cannot create djvu document context from djvu file %s.\n",
infile);
return(-2);
}
i=ddjvu_document_get_pagenum(doc);
if (pageno<0 || pageno>i)
{
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
nprintf(out,"Page number %d is out of range for djvu file %s.\n",pageno,infile);
return(-3);
}
page=ddjvu_page_create_by_pageno(doc,pageno-1);
if (page==NULL)
{
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
nprintf(out,"Cannot parse page %d of djvu file %s.\n",pageno,infile);
return(-4);
}
while (!ddjvu_page_decoding_done(page))
handle(1,ctx);
if (ddjvu_page_decoding_error(page))
{
ddjvu_page_release(page);
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
nprintf(out,"Error decoding page %d of djvu file %s.\n",pageno,infile);
return(-5);
}
/* type= */ ddjvu_page_get_type(page);
/*
printf("type=%d\n",type);
description=ddjvu_page_get_long_description(page);
printf("Description='%s'\n",description);
*/
iw = ddjvu_page_get_width(page);
ih = ddjvu_page_get_height(page);
idpi = ddjvu_page_get_resolution(page);
prect.x=prect.y=0;
bmp->width=prect.w=iw*dpi/idpi;
bmp->height=prect.h=ih*dpi/idpi;
bmp->bpp=(bpp==8) ? 8 : 24;
rrect=prect;
bmp_alloc(bmp);
if (bmp->bpp==8)
{
int ii;
for (ii=0;ii<256;ii++)
bmp->red[ii]=bmp->blue[ii]=bmp->green[ii]=ii;
}
mode=DDJVU_RENDER_COLOR;
style=bpp==8 ? DDJVU_FORMAT_GREY8 : DDJVU_FORMAT_RGB24;
fmt=ddjvu_format_create(style,0,0);
if (fmt==NULL)
{
ddjvu_page_release(page);
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
nprintf(out,"Error setting DJVU format for djvu file %s (page %d).\n",infile,pageno);
return(-6);
}
ddjvu_format_set_row_order(fmt,1);
status=ddjvu_page_render(page,mode,&prect,&rrect,fmt,bmp_bytewidth(bmp),(char *)bmp->data);
ddjvu_format_release(fmt);
ddjvu_page_release(page);
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
if (!status)
{
nprintf(out,"Error rendering page %d of djvu file %s.\n",pageno,infile);
return(-7);
}
return(0);
}
