add trim page option

djvu.c

@@ -490,9 +490,11 @@ static int reflowPage(lua_State *L) {
 	int rotation = luaL_checkint(L, 16);
 	double quality = luaL_checknumber(L, 17);
 	double defect_size = luaL_checknumber(L, 18);
+	int trim_page = luaL_checkint(L, 19);
 
 	k2pdfopt_set_params(width, height, font_size, page_margin, line_spacing, word_spacing, \
-			text_wrap, straighten, justification, detect_indent, columns, contrast, rotation, quality, defect_size);
+			text_wrap, straighten, justification, detect_indent, columns, contrast, rotation, \
+			quality, defect_size, trim_page);
 	k2pdfopt_djvu_reflow(page->page_ref, page->doc->context, mode, page->doc->pixelformat);
 	k2pdfopt_rfbmp_size(&width, &height);
 	k2pdfopt_rfbmp_zoom(&dc->zoom);

k2pdfopt.c

@@ -560,7 +560,7 @@ void k2pdfopt_set_params(int bb_width, int bb_height, \
 		int justification, int detect_indent,\
 		int columns, double contrast, \
 		int rotation, double quality, \
-		double defect_size) {
+		double defect_size, int trim_page) {
 	dst_userwidth  = bb_width; // dst_width is adjusted in adjust_params_init
 	dst_userheight = bb_height;
 	zoom_value = font_size;
@@ -575,6 +575,18 @@ void k2pdfopt_set_params(int bb_width, int bb_height, \
 	src_dpi = (int)300*quality;
 	defect_size_pts = defect_size;
 
+	if (trim_page == 0) {
+		mar_left = 0;
+		mar_top = 0;
+		mar_right = 0;
+		mar_bot = 0;
+	} else {
+		mar_left = -1;
+		mar_top = -1;
+		mar_right = -1;
+		mar_bot = -1;
+	}
+
 	// margin
 	dst_mar = page_margin;
 	dst_martop = -1.0;

k2pdfopt.h

@@ -33,7 +33,7 @@ void k2pdfopt_set_params(int bb_width, int bb_height, \
 		int justification, int detect_indent, \
 		int columns, double contrast, \
 		int rotation, double quality, \
-		double defect_size);
+		double defect_size, int trim_page);
 void k2pdfopt_mupdf_reflow(fz_document *doc, fz_page *page, fz_context *ctx);
 void k2pdfopt_djvu_reflow(ddjvu_page_t *page, ddjvu_context_t *ctx, ddjvu_render_mode_t mode, ddjvu_format_t *fmt);
 void k2pdfopt_rfbmp_size(int *width, int *height);

pdf.c

@@ -530,9 +530,11 @@ static int reflowPage(lua_State *L) {
 	int rotation = luaL_checkint(L, 16);
 	double quality = luaL_checknumber(L, 17);
 	double defect_size = luaL_checknumber(L, 18);
+	int trim_page = luaL_checkint(L, 19);
 
 	k2pdfopt_set_params(width, height, font_size, page_margin, line_spacing, word_spacing, \
-			text_wrap, straighten, justification, detect_indent, columns, contrast, rotation, quality, defect_size);
+			text_wrap, straighten, justification, detect_indent, columns, contrast, rotation, \
+			quality, defect_size, trim_page);
 	k2pdfopt_mupdf_reflow(page->doc->xref, page->page, page->doc->context);
 	k2pdfopt_rfbmp_size(&width, &height);
 	k2pdfopt_rfbmp_zoom(&dc->zoom);