Rearrange source files.

1 files changed, 141 insertions, 0 deletions

diff --git a/source/pdf/pdf-cmap-load.c b/source/pdf/pdf-cmap-load.c
new file mode 100644
index 00000000..5fcae15d
--- /dev/null
+++ b/source/pdf/pdf-cmap-load.c
@@ -0,0 +1,141 @@
+#include "mupdf/pdf.h"
+
+unsigned int
+pdf_cmap_size(fz_context *ctx, pdf_cmap *cmap)
+{
+	if (cmap == NULL)
+		return 0;
+	if (cmap->storable.refs < 0)
+		return 0;
+
+	return cmap->rcap * sizeof(pdf_range) + cmap->tcap * sizeof(short) + pdf_cmap_size(ctx, cmap->usecmap);
+}
+
+/*
+ * Load CMap stream in PDF file
+ */
+pdf_cmap *
+pdf_load_embedded_cmap(pdf_document *xref, pdf_obj *stmobj)
+{
+	fz_stream *file = NULL;
+	pdf_cmap *cmap = NULL;
+	pdf_cmap *usecmap;
+	pdf_obj *wmode;
+	pdf_obj *obj = NULL;
+	fz_context *ctx = xref->ctx;
+	int phase = 0;
+
+	fz_var(phase);
+	fz_var(obj);
+	fz_var(file);
+	fz_var(cmap);
+
+	if (pdf_obj_marked(stmobj))
+		fz_throw(ctx, FZ_ERROR_GENERIC, "Recursion in embedded cmap");
+
+	if ((cmap = pdf_find_item(ctx, pdf_free_cmap_imp, stmobj)))
+	{
+		return cmap;
+	}
+
+	fz_try(ctx)
+	{
+		file = pdf_open_stream(xref, pdf_to_num(stmobj), pdf_to_gen(stmobj));
+		phase = 1;
+		cmap = pdf_load_cmap(ctx, file);
+		phase = 2;
+		fz_close(file);
+		file = NULL;
+
+		wmode = pdf_dict_gets(stmobj, "WMode");
+		if (pdf_is_int(wmode))
+			pdf_set_cmap_wmode(ctx, cmap, pdf_to_int(wmode));
+		obj = pdf_dict_gets(stmobj, "UseCMap");
+		if (pdf_is_name(obj))
+		{
+			usecmap = pdf_load_system_cmap(ctx, pdf_to_name(obj));
+			pdf_set_usecmap(ctx, cmap, usecmap);
+			pdf_drop_cmap(ctx, usecmap);
+		}
+		else if (pdf_is_indirect(obj))
+		{
+			phase = 3;
+			pdf_obj_mark(obj);
+			usecmap = pdf_load_embedded_cmap(xref, obj);
+			pdf_obj_unmark(obj);
+			phase = 4;
+			pdf_set_usecmap(ctx, cmap, usecmap);
+			pdf_drop_cmap(ctx, usecmap);
+		}
+
+		pdf_store_item(ctx, stmobj, cmap, pdf_cmap_size(ctx, cmap));
+	}
+	fz_catch(ctx)
+	{
+		if (file)
+			fz_close(file);
+		if (cmap)
+			pdf_drop_cmap(ctx, cmap);
+		if (phase < 1)
+			fz_rethrow_message(ctx, "cannot open cmap stream (%d %d R)", pdf_to_num(stmobj), pdf_to_gen(stmobj));
+		else if (phase < 2)
+			fz_rethrow_message(ctx, "cannot parse cmap stream (%d %d R)", pdf_to_num(stmobj), pdf_to_gen(stmobj));
+		else if (phase < 3)
+			fz_rethrow_message(ctx, "cannot load system usecmap '%s'", pdf_to_name(obj));
+		else
+		{
+			if (phase == 3)
+				pdf_obj_unmark(obj);
+			fz_rethrow_message(ctx, "cannot load embedded usecmap (%d %d R)", pdf_to_num(obj), pdf_to_gen(obj));
+		}
+	}
+
+	return cmap;
+}
+
+/*
+ * Create an Identity-* CMap (for both 1 and 2-byte encodings)
+ */
+pdf_cmap *
+pdf_new_identity_cmap(fz_context *ctx, int wmode, int bytes)
+{
+	pdf_cmap *cmap = pdf_new_cmap(ctx);
+	fz_try(ctx)
+	{
+		sprintf(cmap->cmap_name, "Identity-%c", wmode ? 'V' : 'H');
+		pdf_add_codespace(ctx, cmap, 0x0000, 0xffff, bytes);
+		pdf_map_range_to_range(ctx, cmap, 0x0000, 0xffff, 0);
+		pdf_sort_cmap(ctx, cmap);
+		pdf_set_cmap_wmode(ctx, cmap, wmode);
+	}
+	fz_catch(ctx)
+	{
+		pdf_drop_cmap(ctx, cmap);
+		fz_rethrow(ctx);
+	}
+	return cmap;
+}
+
+/*
+ * Load predefined CMap from system.
+ */
+pdf_cmap *
+pdf_load_system_cmap(fz_context *ctx, char *cmap_name)
+{
+	pdf_cmap *usecmap;
+	pdf_cmap *cmap;
+
+	cmap = pdf_load_builtin_cmap(ctx, cmap_name);
+	if (!cmap)
+		fz_throw(ctx, FZ_ERROR_GENERIC, "no builtin cmap file: %s", cmap_name);
+
+	if (cmap->usecmap_name[0] && !cmap->usecmap)
+	{
+		usecmap = pdf_load_builtin_cmap(ctx, cmap->usecmap_name);
+		if (!usecmap)
+			fz_throw(ctx, FZ_ERROR_GENERIC, "nu builtin cmap file: %s", cmap->usecmap_name);
+		pdf_set_usecmap(ctx, cmap, usecmap);
+	}
+
+	return cmap;
+}