2 files changed, 67 insertions, 0 deletions
diff --git a/payloads/libpayload/include/cbgfx.h b/payloads/libpayload/include/cbgfx.h
new file mode 100644
index 0000000000..1f3e0b48d2
--- /dev/null
+++ b/payloads/libpayload/include/cbgfx.h
@@ -0,0 +1,66 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2015 Google, Inc.
+ */
+
+#include <stdint.h>
+
+/*
+ * API error codes
+ */
+#define CBGFX_SUCCESS		0
+/* unknown error */
+#define CBGFX_ERROR_UNKNOWN	1
+/* failed to initialize cbgfx library */
+#define CBGFX_ERROR_INIT	2
+/* drawing beyond canvas boundary */
+#define CBGFX_ERROR_BOUNDARY	3
+
+struct vector {
+	union {
+		uint32_t x;
+		uint32_t width;
+	};
+	union {
+		uint32_t y;
+		uint32_t height;
+	};
+};
+
+struct rgb_color {
+	uint8_t red;
+	uint8_t green;
+	uint8_t blue;
+};
+
+/*
+ * Resolution of scale parameters used to describe height, width, coordinate,
+ * etc. relative to the canvas. For example, if it's 100, scales range from 0 to
+ * 100%.
+ */
+#define CANVAS_SCALE		100
+
+/*
+ * The coordinate system is expected to have (0, 0) at top left corner with
+ * y values increasing towards bottom of screen.
+ */
+
+/*
+ * draw a box filled with a color on screen
+ *
+ * top_left_rel: coordinate of top left corner of the box, relative to canvas.
+ * (0 - CANVAS_SCALE).
+ * size_rel: width and height of the box, relative to canvas. (0 - CANVAS_SCALE)
+ * rgb: RGB color of the box.
+ *
+ * return: CBGFX_* error codes
+ */
+int draw_box(const struct vector *top_left_rel,
+	     const struct vector *size_rel,
+	     const struct rgb_color *rgb);
+
+/*
+ * Clear the canvas
+ */
+int clear_canvas(struct rgb_color *rgb);
diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h
index 470aafab5a..a1dbb0143b 100644
--- a/payloads/libpayload/include/libpayload.h
+++ b/payloads/libpayload/include/libpayload.h
@@ -44,6 +44,7 @@
 #define _LIBPAYLOAD_H
 
 #include <libpayload-config.h>
+#include <cbgfx.h>
 #include <ctype.h>
 #include <die.h>
 #include <endian.h>