integrate djvu support

Makefile

@@ -4,6 +4,7 @@ LUADIR=lua
 MUPDFDIR=mupdf
 MUPDFTARGET=build/debug
 MUPDFLIBDIR=$(MUPDFDIR)/$(MUPDFTARGET)
+DJVUDIR=djvulibre
 
 FREETYPEDIR=$(MUPDFDIR)/thirdparty/freetype-2.4.8
 LFSDIR=luafilesystem
@@ -11,7 +12,9 @@ LFSDIR=luafilesystem
 # set this to your ARM cross compiler:
 
 CC:=arm-unknown-linux-gnueabi-gcc
+CXX:=arm-unknown-linux-gnueabi-g++
 HOSTCC:=gcc
+HOSTCXX:=g++
 
 CFLAGS:=-O3
 ARM_CFLAGS:=-march=armv6
@@ -24,6 +27,7 @@ ARM_CFLAGS:=-march=armv6
 
 ifdef EMULATE_READER
 CC:=$(HOSTCC)
+CXX:=$(HOSTCXX)
 EMULATE_READER_W?=824
 EMULATE_READER_H?=1200
 EMU_CFLAGS?=$(shell sdl-config --cflags)
@@ -46,6 +50,7 @@ KPDFREADER_CFLAGS=$(CFLAGS) -I$(LUADIR)/src -I$(MUPDFDIR)/
 # for now, all dependencies except for the libc are compiled into the final binary:
 
 MUPDFLIBS := $(MUPDFLIBDIR)/libfitz.a
+DJVULIBS := $(DJVUDIR)/build/libdjvu/.libs/libdjvulibre.a
 THIRDPARTYLIBS := $(MUPDFLIBDIR)/libfreetype.a \
 	       	$(MUPDFLIBDIR)/libjpeg.a \
 	       	$(MUPDFLIBDIR)/libopenjpeg.a \
@@ -54,8 +59,8 @@ THIRDPARTYLIBS := $(MUPDFLIBDIR)/libfreetype.a \
 
 LUALIB := $(LUADIR)/src/liblua.a
 
-kpdfview: kpdfview.o einkfb.o pdf.o blitbuffer.o input.o util.o ft.o $(SQLITE3OBJS) lfs.o $(MUPDFLIBS) $(THIRDPARTYLIBS) $(LUALIB)
-	$(CC) -lm -ldl $(EMU_LDFLAGS) \
+kpdfview: kpdfview.o einkfb.o pdf.o blitbuffer.o input.o util.o ft.o $(SQLITE3OBJS) lfs.o $(MUPDFLIBS) $(THIRDPARTYLIBS) $(LUALIB) $(DJVULIBS) djvu.o
+	$(CC) -lm -ldl $(EMU_LDFLAGS) -lstdc++ \
 		kpdfview.o \
 		einkfb.o \
 		pdf.o \
@@ -67,6 +72,8 @@ kpdfview: kpdfview.o einkfb.o pdf.o blitbuffer.o input.o util.o ft.o $(SQLITE3OB
 		$(MUPDFLIBS) \
 		$(THIRDPARTYLIBS) \
 		$(LUALIB) \
+		djvu.o \
+		$(DJVULIBS) \
 		-o kpdfview
 
 einkfb.o input.o: %.o: %.c
@@ -78,6 +85,9 @@ ft.o: %.o: %.c
 kpdfview.o pdf.o blitbuffer.o util.o: %.o: %.c
 	$(CC) -c $(KPDFREADER_CFLAGS) -I$(LFSDIR)/src $< -o $@
 
+djvu.o: %.o: %.c
+	$(CC) -c $(KPDFREADER_CFLAGS) -I$(DJVUDIR)/ $< -o $@
+
 lfs.o: $(LFSDIR)/src/lfs.c
 	$(CC) -c $(CFLAGS) -I$(LUADIR)/src -I$(LFSDIR)/src $(LFSDIR)/src/lfs.c -o $@
 
@@ -85,10 +95,12 @@ fetchthirdparty:
 	-rm -Rf mupdf
 	-rm -Rf lua lua-5.1.4*
 	-rm -Rf luafilesystem*
+	-rm -Rf $(DJVUDIR)
 	git clone git://git.ghostscript.com/mupdf.git
 	( cd mupdf ; wget http://www.mupdf.com/download/mupdf-thirdparty.zip && unzip mupdf-thirdparty.zip )
 	wget http://www.lua.org/ftp/lua-5.1.4.tar.gz && tar xvzf lua-5.1.4.tar.gz && ln -s lua-5.1.4 lua
 	git clone https://github.com/keplerproject/luafilesystem.git
+	git clone git://djvu.git.sourceforge.net/gitroot/djvu/djvulibre.git
 
 clean:
 	-rm -f *.o kpdfview
@@ -96,6 +108,7 @@ clean:
 cleanthirdparty:
 	make -C $(LUADIR) clean
 	make -C $(MUPDFDIR) clean
+	-rm -rf $(DJVUDIR)/build
 	-rm $(MUPDFDIR)/fontdump.host
 	-rm $(MUPDFDIR)/cmapdump.host
 
@@ -113,10 +126,19 @@ $(MUPDFLIBS) $(THIRDPARTYLIBS): $(MUPDFDIR)/cmapdump.host $(MUPDFDIR)/fontdump.h
 	# build only thirdparty libs, libfitz and pdf utils, which will care for libmupdf.a being built
 	CFLAGS="$(CFLAGS)" make -C mupdf CC="$(CC)" CMAPDUMP=cmapdump.host FONTDUMP=fontdump.host MUPDF= XPS_APPS=
 
+$(DJVULIBS):
+	-mkdir $(DJVUDIR)/build 
+ifdef EMULATE_READER
+	cd $(DJVUDIR)/build && ../configure --disable-desktopfiles --disable-shared --enable-static
+else
+	cd $(DJVUDIR)/build && ../configure --disable-desktopfiles --disable-shared --enable-static --host=arm-kindle-linux-gnueabi
+endif
+	make -C $(DJVUDIR)/build
+
 $(LUALIB):
 	make -C lua/src CC="$(CC)" CFLAGS="$(CFLAGS)" MYCFLAGS=-DLUA_USE_LINUX MYLIBS="-Wl,-E" liblua.a
 
-thirdparty: $(MUPDFLIBS) $(THIRDPARTYLIBS) $(LUALIBS)
+thirdparty: $(MUPDFLIBS) $(THIRDPARTYLIBS) $(LUALIBS) $(DJVULIBS)
 
 INSTALL_DIR=kindlepdfviewer
 

djvu.c

@@ -0,0 +1,430 @@
+/*
+    KindlePDFViewer: MuPDF abstraction for Lua
+    Copyright (C) 2011 Hans-Werner Hilse <hilse@web.de>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <libdjvu/ddjvuapi.h>
+
+#include "string.h"
+#include "blitbuffer.h"
+#include "djvu.h"
+
+#define MIN(a, b)      ((a) < (b) ? (a) : (b))
+#define MAX(a, b)      ((a) > (b) ? (a) : (b))
+
+/*@TODO check all the close method, ensure memories are freed  03.03 2012*/
+
+typedef struct DjvuDocument {
+	ddjvu_context_t *context;
+	ddjvu_document_t *doc_ref;
+	int pages;
+} DjvuDocument;
+
+typedef struct DjvuPage {
+	int num;
+	ddjvu_page_t *page_ref;
+	ddjvu_pageinfo_t info;
+	DjvuDocument *doc;
+} DjvuPage;
+
+typedef struct DrawContext {
+	int rotate;
+	double zoom;
+	double gamma;
+	int offset_x;
+	int offset_y;
+} DrawContext;
+
+
+static int handle(lua_State *L, ddjvu_context_t *ctx, int wait)
+{
+	const ddjvu_message_t *msg;
+	if (!ctx)
+		return;
+	if (wait)
+		msg = ddjvu_message_wait(ctx);
+	while ((msg = ddjvu_message_peek(ctx)))
+	{
+	  switch(msg->m_any.tag)
+		{
+		case DDJVU_ERROR:
+			if (msg->m_error.filename) {
+				return luaL_error(L, "ddjvu: %s\nddjvu: '%s:%d'\n", 
+					msg->m_error.message, msg->m_error.filename, 
+					msg->m_error.lineno);
+			} else {
+				return luaL_error(L, "ddjvu: %s\n", msg->m_error.message);
+			}
+		default:
+		  break;
+		}
+	  ddjvu_message_pop(ctx);
+	}
+
+	return 0;
+}
+
+static int openDocument(lua_State *L) {
+	const char *filename = luaL_checkstring(L, 1);
+	/*const char *password = luaL_checkstring(L, 2);*/
+
+	DjvuDocument *doc = (DjvuDocument*) lua_newuserdata(L, sizeof(DjvuDocument));
+	luaL_getmetatable(L, "djvudocument");
+	lua_setmetatable(L, -2);
+
+	doc->context = ddjvu_context_create("DJVUReader");
+	if (! doc->context) {
+		return luaL_error(L, "cannot create context.");
+	}
+
+	doc->doc_ref = ddjvu_document_create_by_filename(doc->context, filename, TRUE);
+	while (! ddjvu_document_decoding_done(doc->doc_ref))
+		handle(L, doc->context, True);
+	if (! doc->doc_ref) {
+		return luaL_error(L, "cannot open DJVU file <%s>", filename);
+	}
+
+	doc->pages = ddjvu_document_get_pagenum(doc->doc_ref);
+	return 1;
+}
+
+static int closeDocument(lua_State *L) {
+	DjvuDocument *doc = (DjvuDocument*) luaL_checkudata(L, 1, "djvudocument");
+	if(doc->doc_ref != NULL) {
+		ddjvu_document_release(doc->doc_ref);
+		doc->doc_ref = NULL;
+	}
+	if(doc->context != NULL) {
+		ddjvu_context_release(doc->context);
+
+		/*@TODO fix this!  03.03 2012
+		 * it works fine in EMU mode, but if I don't
+		 * add this printf after context_release, kpfview 
+		 * simply exit after this function call! */
+		printf("remeber to fix this bug!\n");
+
+		doc->context = NULL;
+	}
+}
+
+static int getNumberOfPages(lua_State *L) {
+	DjvuDocument *doc = (DjvuDocument*) luaL_checkudata(L, 1, "djvudocument");
+	lua_pushinteger(L, doc->pages);
+	return 1;
+}
+
+static int newDrawContext(lua_State *L) {
+	int rotate = luaL_optint(L, 1, 0);
+	double zoom = luaL_optnumber(L, 2, (double) 1.0);
+	int offset_x = luaL_optint(L, 3, 0);
+	int offset_y = luaL_optint(L, 4, 0);
+	double gamma = luaL_optnumber(L, 5, (double) -1.0);
+
+	DrawContext *dc = (DrawContext*) lua_newuserdata(L, sizeof(DrawContext));
+	dc->rotate = rotate;
+	dc->zoom = zoom;
+	dc->offset_x = offset_x;
+	dc->offset_y = offset_y;
+	dc->gamma = gamma;
+
+
+	luaL_getmetatable(L, "drawcontext");
+	lua_setmetatable(L, -2);
+
+	return 1;
+}
+
+static int dcSetOffset(lua_State *L) {
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
+	dc->offset_x = luaL_checkint(L, 2);
+	dc->offset_y = luaL_checkint(L, 3);
+	return 0;
+}
+
+static int dcGetOffset(lua_State *L) {
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
+	lua_pushinteger(L, dc->offset_x);
+	lua_pushinteger(L, dc->offset_y);
+	return 2;
+}
+
+static int dcSetRotate(lua_State *L) {
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
+	dc->rotate = luaL_checkint(L, 2);
+	return 0;
+}
+
+static int dcSetZoom(lua_State *L) {
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
+	dc->zoom = luaL_checknumber(L, 2);
+	return 0;
+}
+
+static int dcGetRotate(lua_State *L) {
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
+	lua_pushinteger(L, dc->rotate);
+	return 1;
+}
+
+static int dcGetZoom(lua_State *L) {
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
+	lua_pushnumber(L, dc->zoom);
+	return 1;
+}
+
+static int dcSetGamma(lua_State *L) {
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
+	dc->gamma = luaL_checknumber(L, 2);
+	return 0;
+}
+
+static int dcGetGamma(lua_State *L) {
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 1, "drawcontext");
+	lua_pushnumber(L, dc->gamma);
+	return 1;
+}
+
+static int openPage(lua_State *L) {
+	ddjvu_status_t r;
+	DjvuDocument *doc = (DjvuDocument*) luaL_checkudata(L, 1, "djvudocument");
+	int pageno = luaL_checkint(L, 2);
+
+	if(pageno < 1 || pageno > doc->pages) {
+		return luaL_error(L, "cannot open page #%d, out of range (1-%d)", pageno, doc->pages);
+	}
+
+	DjvuPage *page = (DjvuPage*) lua_newuserdata(L, sizeof(DjvuPage));
+	luaL_getmetatable(L, "djvupage");
+	lua_setmetatable(L, -2);
+
+	page->page_ref = ddjvu_page_create_by_pageno(doc->doc_ref, pageno - 1);
+	while (! ddjvu_page_decoding_done(page->page_ref))
+		handle(L, doc->context, TRUE);
+	if(! page->page_ref) {
+		return luaL_error(L, "cannot open page #%d", pageno);
+	}
+
+	page->doc = doc;
+	page->num = pageno;
+
+	while((r=ddjvu_document_get_pageinfo(doc->doc_ref, pageno, &(page->info)))<DDJVU_JOB_OK)
+		handle(L, doc->context, TRUE);
+	if (r>=DDJVU_JOB_FAILED)
+		return luaL_error(L, "cannot get page #%d information", pageno);
+
+	return 1;
+}
+
+/* get page size after zoomed */
+static int getPageSize(lua_State *L) {
+	DjvuPage *page = (DjvuPage*) luaL_checkudata(L, 1, "djvupage");
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 2, "drawcontext");
+
+	lua_pushnumber(L, dc->zoom * page->info.width);
+	lua_pushnumber(L, dc->zoom * page->info.height);
+
+	return 2;
+}
+
+/*static int getUsedBBox(lua_State *L) {*/
+	/*fz_bbox result;*/
+	/*fz_matrix ctm;*/
+	/*fz_device *dev;*/
+	/*DjvuPage *page = (DjvuPage*) luaL_checkudata(L, 1, "djvupage");*/
+
+	/*[> returned BBox is in centi-point (n * 0.01 pt) <]*/
+	/*ctm = fz_scale(100, 100);*/
+	/*ctm = fz_concat(ctm, fz_rotate(page->page->rotate));*/
+
+	/*fz_try(page->doc->context) {*/
+		/*dev = fz_new_bbox_device(page->doc->context, &result);*/
+		/*pdf_run_page(page->doc->xref, page->page, dev, ctm, NULL);*/
+	/*}*/
+	/*fz_always(page->doc->context) {*/
+		/*fz_free_device(dev);*/
+	/*}*/
+	/*fz_catch(page->doc->context) {*/
+		/*return luaL_error(L, "cannot calculate bbox for page");*/
+	/*}*/
+
+           /*lua_pushnumber(L, ((double)result.x0)/100);*/
+	/*lua_pushnumber(L, ((double)result.y0)/100);*/
+           /*lua_pushnumber(L, ((double)result.x1)/100);*/
+	/*lua_pushnumber(L, ((double)result.y1)/100);*/
+
+	/*return 4;*/
+/*}*/
+
+static int closePage(lua_State *L) {
+	DjvuPage *page = (DjvuPage*) luaL_checkudata(L, 1, "djvupage");
+	if(page->page_ref != NULL) {
+		ddjvu_page_release(page->page_ref);
+		page->page_ref = NULL;
+	}
+	return 0;
+}
+
+static int drawPage(lua_State *L) {
+	DjvuPage *page = (DjvuPage*) luaL_checkudata(L, 1, "djvupage");
+	DrawContext *dc = (DrawContext*) luaL_checkudata(L, 2, "drawcontext");
+	BlitBuffer *bb = (BlitBuffer*) luaL_checkudata(L, 3, "blitbuffer");
+
+	ddjvu_format_t *pixelformat;
+	ddjvu_rect_t pagerect, renderrect;
+	uint8_t *imagebuffer = NULL;
+
+	imagebuffer = malloc((bb->w)*(bb->h)+1);
+	/* fill pixel map with white color */
+	memset(imagebuffer, 0xFF, (bb->w)*(bb->h)+1);
+
+	pixelformat = ddjvu_format_create(DDJVU_FORMAT_GREY8, 0, NULL);
+	ddjvu_format_set_row_order(pixelformat, 1);
+	ddjvu_format_set_y_direction(pixelformat, 1);
+	ddjvu_format_set_gamma(pixelformat, dc->gamma);
+	/*ddjvu_format_set_ditherbits(dc->pixelformat, 2);*/
+
+	/*printf("@page %d, @@zoom:%f, offset: (%d, %d)\n", page->num, dc->zoom, dc->offset_x, dc->offset_y);*/
+
+	/* render full page into rectangle specified by pagerect */
+	/*pagerect.x = luaL_checkint(L, 4);*/
+	/*pagerect.y = luaL_checkint(L, 5);*/
+	pagerect.x = 0;
+	pagerect.y = 0;
+	pagerect.w = page->info.width * dc->zoom;
+	pagerect.h = page->info.height * dc->zoom;
+
+	/*printf("--pagerect--- (x: %d, y: %d), w: %d, h: %d.\n", 0, 0, pagerect.w, pagerect.h);*/
+
+
+	/* copy pixels area from pagerect specified by renderrect.
+
+	 * ddjvulibre library does not support negative offset, positive offset 
+	 * means moving towards right and down.
+	 *
+	 * However, djvureader.lua handles offset differently. It use negative 
+	 * offset to move right and down while positive offset to move left 
+	 * and up. So we need to handle positive offset manually when copying 
+	 * imagebuffer to blitbuffer (framebuffer). 
+	 */
+	renderrect.x = MAX(-dc->offset_x, 0);
+	renderrect.y = MAX(-dc->offset_y, 0);
+	renderrect.w = MIN(pagerect.w - renderrect.x, bb->w);
+	renderrect.h = MIN(pagerect.h - renderrect.y, bb->h);
+
+	/*printf("--renderrect--- (%d, %d), w:%d, h:%d\n", renderrect.x, renderrect.y, renderrect.w, renderrect.h);*/
+
+	/* ddjvulibre library only supports rotation of 0, 90, 180 and 270 degrees. 
+	 * This four kinds of rotations can already be achieved by native system.
+	 * So we don't set rotation here.
+	 */
+
+	ddjvu_page_render(page->page_ref,
+			DDJVU_RENDER_COLOR,
+			&pagerect,
+			&renderrect,
+			pixelformat,
+			bb->w,
+			imagebuffer);
+
+	uint8_t *bbptr = (uint8_t*)bb->data;
+	uint8_t *pmptr = (uint8_t*)imagebuffer;
+	int x, y;
+	/* if offset is positive, we are moving towards up and left. */
+	int x_offset = MAX(0, dc->offset_x);
+	int y_offset = MAX(0, dc->offset_y);
+
+	bbptr += bb->pitch * y_offset;
+	for(y = y_offset; y < bb->h; y++) {
+		/* bbptr's line width is half of pmptr's */
+		for(x = x_offset/2; x < (bb->w / 2); x++) {
+			bbptr[x] = 255 - (((pmptr[x*2 + 1 - x_offset] & 0xF0) >> 4) | 
+								(pmptr[x*2 - x_offset] & 0xF0));
+		}
+		if(bb->w & 1) {
+			bbptr[x] = 255 - (pmptr[x*2] & 0xF0);
+		}
+		/* go to next line */
+		bbptr += bb->pitch;
+		pmptr += bb->w;
+	}
+
+	free(imagebuffer);
+	pmptr = imagebuffer = NULL;
+	ddjvu_format_release(pixelformat);
+
+	return 0;
+}
+
+static const struct luaL_reg djvu_func[] = {
+	{"openDocument", openDocument},
+	{"newDC", newDrawContext},
+	{NULL, NULL}
+};
+
+static const struct luaL_reg djvudocument_meth[] = {
+	{"openPage", openPage},
+	{"getPages", getNumberOfPages},
+	/*{"getTOC", getTableOfContent},*/
+	{"close", closeDocument},
+	{"__gc", closeDocument},
+	{NULL, NULL}
+};
+
+static const struct luaL_reg djvupage_meth[] = {
+	{"getSize", getPageSize},
+	/*{"getUsedBBox", getUsedBBox},*/
+	{"close", closePage},
+	{"__gc", closePage},
+	{"draw", drawPage},
+	{NULL, NULL}
+};
+
+static const struct luaL_reg drawcontext_meth[] = {
+	{"setRotate", dcSetRotate},
+	{"getRotate", dcGetRotate},
+	{"setZoom", dcSetZoom},
+	{"getZoom", dcGetZoom},
+	{"setOffset", dcSetOffset},
+	{"getOffset", dcGetOffset},
+	{"setGamma", dcSetGamma},
+	{"getGamma", dcGetGamma},
+	{NULL, NULL}
+};
+
+int luaopen_djvu(lua_State *L) {
+	luaL_newmetatable(L, "djvudocument");
+	lua_pushstring(L, "__index");
+	lua_pushvalue(L, -2);
+	lua_settable(L, -3);
+	luaL_register(L, NULL, djvudocument_meth);
+	lua_pop(L, 1);
+
+	luaL_newmetatable(L, "djvupage");
+	lua_pushstring(L, "__index");
+	lua_pushvalue(L, -2);
+	lua_settable(L, -3);
+	luaL_register(L, NULL, djvupage_meth);
+	lua_pop(L, 1);
+
+	luaL_newmetatable(L, "drawcontext");
+	lua_pushstring(L, "__index");
+	lua_pushvalue(L, -2);
+	lua_settable(L, -3);
+	luaL_register(L, NULL, drawcontext_meth);
+	lua_pop(L, 1);
+
+	luaL_register(L, "djvu", djvu_func);
+	return 1;
+}

djvu.h

@@ -0,0 +1,28 @@
+/*
+    KindlePDFViewer: MuPDF abstraction for Lua
+    Copyright (C) 2011 Hans-Werner Hilse <hilse@web.de>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef _DJVU_H
+#define _DJVU_H
+
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+
+int luaopen_djvu(lua_State *L);
+
+#define True 1
+#endif

filechooser.lua

@@ -41,7 +41,7 @@ function FileChooser:readdir()
 	for f in lfs.dir(self.path) do
 		if lfs.attributes(self.path.."/"..f, "mode") == "directory" and f ~= "." and not string.match(f, "^%.[^.]") then
 			table.insert(self.dirs, f)
-		elseif string.match(f, ".+%.[pP][dD][fF]$") then
+		elseif string.match(f, ".+%.[pP][dD][fF]$") or string.match(f, ".+%.[dD][jJ][vV][uU]$") then
 			table.insert(self.files, f)
 		end
 	end

filesearcher.lua

@@ -46,7 +46,7 @@ function FileSearcher:readdir()
 				if lfs.attributes(d.."/"..f, "mode") == "directory"
 				and f ~= "." and f~= ".." and not string.match(f, "^%.[^.]") then
 					table.insert(new_dirs, d.."/"..f)
-				elseif string.match(f, ".+%.[pP][dD][fF]$") then
+				elseif string.match(f, ".+%.[pP][dD][fF]$") or string.match(f, ".+%.[dD][jJ][vV][uU]$") then
 					file_entry = {dir=d, name=f,}
 					table.insert(self.files, file_entry)
 					--print("file:"..d.."/"..f)

kpdfview.c

@@ -50,6 +50,7 @@ int main(int argc, char **argv) {
 		luaopen_blitbuffer(L);
 		luaopen_einkfb(L);
 		luaopen_pdf(L);
+		luaopen_djvu(L);
 		luaopen_input(L);
 		luaopen_util(L);
 		luaopen_ft(L);