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); }