lavfi: add drawutils

Add drawutils.h and drawutils.c, and use them in the pad filter.
The new functions are going to be shared by other filters.

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/libavfilter/drawutils.h b/libavfilter/drawutils.h
new file mode 100644
index 0000000000..e838660579
--- /dev/null
+++ b/libavfilter/drawutils.h
@@ -0,0 +1,43 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFILTER_DRAWUTILS_H
+#define AVFILTER_DRAWUTILS_H
+
+/**
+ * @file
+ * misc drawing utilities
+ */
+
+#include <stdint.h>
+#include "libavutil/pixfmt.h"
+
+int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w,
+                            uint8_t dst_color[4],
+                            enum PixelFormat pix_fmt, uint8_t rgba_color[4],
+                            int *is_packed_rgba, uint8_t rgba_map[4]);
+
+void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
+                       uint8_t *src[4], int pixelstep[4],
+                       int hsub, int vsub, int x, int y, int w, int h);
+
+void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
+                       uint8_t *src[4], int src_linesize[4], int pixelstep[4],
+                       int hsub, int vsub, int x, int y, int y2, int w, int h);
+
+#endif /* AVFILTER_DRAWUTILS_H */