video: console: Parse UTF-8 character sequences

[thirdparty/u-boot.git] / drivers / video / vidconsole_internal.h

diff --git a/drivers/video/vidconsole_internal.h b/drivers/video/vidconsole_internal.h
index c41edd45249a930edf1f8071fd355fe026d42545..bb0277ee451b485ad4211b22f47e980680c47218 100644 (file)
--- a/drivers/video/vidconsole_internal.h
+++ b/drivers/video/vidconsole_internal.h
@@ -6,6 +6,9 @@
  * (C) Copyright 2023 Dzmitry Sankouski <dsankouski@gmail.com>
  */
 
+#include <charset.h>
+#include <config.h>
+
 #define FLIPPED_DIRECTION 1
 #define NORMAL_DIRECTION 0
 
@@ -92,6 +95,30 @@ int fill_char_vertically(uchar *pfont, void **line, struct video_priv *vid_priv,
 int fill_char_horizontally(uchar *pfont, void **line, struct video_priv *vid_priv,
                           struct video_fontdata *fontdata, bool direction);
 
+/**
+ * draw_cursor_vertically() - Draw a simple vertical cursor
+ *
+ * @line: pointer to framebuffer buffer: upper left cursor corner
+ * @vid_priv: driver private data
+ * @height: height of the cursor in pixels
+ * @param direction    controls cursor orientation. Can be normal or flipped.
+ * When normal:               When flipped:
+ *|-----------------------------------------------|
+ *|               *        |   line stepping      |
+ *|    ^  * * * * *        |   |                  |
+ *|    |    *     *        |   v   *     *        |
+ *|    |                   |       * * * * *      |
+ *|  line stepping         |       *              |
+ *|                        |                      |
+ *|  stepping ->           |        <<- stepping  |
+ *|---!!we're starting from upper left char corner|
+ *|-----------------------------------------------|
+ *
+ * Return: 0, if success, or else error code.
+ */
+int draw_cursor_vertically(void **line, struct video_priv *vid_priv,
+                          uint height, bool direction);
+
 /**
  * console probe function.
  *
@@ -118,3 +145,19 @@ int console_simple_get_font(struct udevice *dev, int seq, struct vidfont_info *i
  * See details in video_console.h select_font function
  **/
 int console_simple_select_font(struct udevice *dev, const char *name, uint size);
+
+/**
+ * Internal function to convert Unicode code points to code page 437.
+ * Used by video consoles using bitmap fonts.
+ *
+ * @param codepoint    Unicode code point
+ * @returns code page 437 character.
+ */
+static inline u8 console_utf_to_cp437(int codepoint)
+{
+       if (CONFIG_IS_ENABLED(CHARSET)) {
+               utf_to_cp(&codepoint, codepage_437);
+               return codepoint;
+       }
+       return codepoint;
+}