Guillermo Stedile / RA8875

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TextDisplay.h@29:422616aa04bd, 2014-01-19 (annotated)

Committer:
WiredHome
Date:
Sun Jan 19 04:24:16 2014 +0000
Revision:
29:422616aa04bd
Parent:
19:3f82c1161fd2
Child:
31:c72e12cd5c67
Initial support for soft fonts compatible with mikroe font creator.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 0:de9d1462a835 1 /* mbed TextDisplay Library Base Class
dreschpe 0:de9d1462a835 2 * Copyright (c) 2007-2009 sford
dreschpe 0:de9d1462a835 3 * Released under the MIT License: http://mbed.org/license/mit
dreschpe 0:de9d1462a835 4 *
dreschpe 0:de9d1462a835 5 * A common base class for Text displays
dreschpe 0:de9d1462a835 6 * To port a new display, derive from this class and implement
dreschpe 0:de9d1462a835 7 * the constructor (setup the display), character (put a character
dreschpe 0:de9d1462a835 8 * at a location), rows and columns (number of rows/cols) functions.
dreschpe 0:de9d1462a835 9 * Everything else (locate, printf, putc, cls) will come for free
dreschpe 0:de9d1462a835 10 *
dreschpe 0:de9d1462a835 11 * The model is the display will wrap at the right and bottom, so you can
WiredHome 19:3f82c1161fd2 12 * keep writing and will always get valid characters. The location is
dreschpe 0:de9d1462a835 13 * maintained internally to the class to make this easy
dreschpe 0:de9d1462a835 14 */
dreschpe 0:de9d1462a835 15
dreschpe 0:de9d1462a835 16 #ifndef MBED_TEXTDISPLAY_H
dreschpe 0:de9d1462a835 17 #define MBED_TEXTDISPLAY_H
dreschpe 0:de9d1462a835 18
dreschpe 0:de9d1462a835 19 #include "mbed.h"
dreschpe 0:de9d1462a835 20
WiredHome 19:3f82c1161fd2 21 typedef uint16_t color_t;
WiredHome 19:3f82c1161fd2 22
WiredHome 19:3f82c1161fd2 23 /// return values from functions
WiredHome 19:3f82c1161fd2 24 typedef enum
WiredHome 19:3f82c1161fd2 25 {
WiredHome 19:3f82c1161fd2 26 noerror,
WiredHome 19:3f82c1161fd2 27 bad_parameter
WiredHome 19:3f82c1161fd2 28 } RetCode_t;
WiredHome 19:3f82c1161fd2 29
WiredHome 19:3f82c1161fd2 30 class TextDisplay : public Stream
WiredHome 19:3f82c1161fd2 31 {
dreschpe 0:de9d1462a835 32 public:
dreschpe 0:de9d1462a835 33
WiredHome 19:3f82c1161fd2 34 // functions needing implementation in derived implementation class
WiredHome 19:3f82c1161fd2 35 /** Create a TextDisplay interface
WiredHome 19:3f82c1161fd2 36 *
WiredHome 19:3f82c1161fd2 37 * @param name The name used in the path to access the strean through the filesystem
WiredHome 19:3f82c1161fd2 38 */
dreschpe 0:de9d1462a835 39 TextDisplay(const char *name = NULL);
dreschpe 0:de9d1462a835 40
dreschpe 0:de9d1462a835 41 /** output a character at the given position
dreschpe 0:de9d1462a835 42 *
WiredHome 29:422616aa04bd 43 * @param x position in pixels
WiredHome 29:422616aa04bd 44 * @param y position in pixels
dreschpe 0:de9d1462a835 45 * @param c the character to be written to the TextDisplay
WiredHome 29:422616aa04bd 46 * @returns number of pixels to advance the cursor.
dreschpe 0:de9d1462a835 47 */
WiredHome 29:422616aa04bd 48 virtual int character(int x, int y, int c) = 0;
dreschpe 0:de9d1462a835 49
dreschpe 0:de9d1462a835 50 /** return number if rows on TextDisplay
dreschpe 0:de9d1462a835 51 * @result number of rows
dreschpe 0:de9d1462a835 52 */
dreschpe 0:de9d1462a835 53 virtual int rows() = 0;
dreschpe 0:de9d1462a835 54
dreschpe 0:de9d1462a835 55 /** return number if columns on TextDisplay
dreschpe 0:de9d1462a835 56 * @result number of rows
dreschpe 0:de9d1462a835 57 */
dreschpe 0:de9d1462a835 58 virtual int columns() = 0;
WiredHome 19:3f82c1161fd2 59
dreschpe 0:de9d1462a835 60 // functions that come for free, but can be overwritten
dreschpe 0:de9d1462a835 61
dreschpe 0:de9d1462a835 62 /** redirect output from a stream (stoud, sterr) to display
dreschpe 0:de9d1462a835 63 * @param stream stream that shall be redirected to the TextDisplay
dreschpe 0:de9d1462a835 64 */
dreschpe 0:de9d1462a835 65 virtual bool claim (FILE *stream);
dreschpe 0:de9d1462a835 66
dreschpe 0:de9d1462a835 67 /** clear screen
dreschpe 0:de9d1462a835 68 */
WiredHome 29:422616aa04bd 69 virtual RetCode_t cls() = 0;
WiredHome 19:3f82c1161fd2 70 virtual RetCode_t locate(unsigned int column, unsigned int row) = 0;
WiredHome 19:3f82c1161fd2 71 virtual RetCode_t foreground(uint16_t colour) = 0;
WiredHome 19:3f82c1161fd2 72 virtual RetCode_t background(uint16_t colour) = 0;
dreschpe 0:de9d1462a835 73 // putc (from Stream)
dreschpe 0:de9d1462a835 74 // printf (from Stream)
dreschpe 0:de9d1462a835 75
WiredHome 19:3f82c1161fd2 76 protected:
dreschpe 0:de9d1462a835 77 virtual int _putc(int value);
dreschpe 0:de9d1462a835 78 virtual int _getc();
dreschpe 0:de9d1462a835 79
dreschpe 0:de9d1462a835 80 // character location
dreschpe 0:de9d1462a835 81 uint16_t _column;
dreschpe 0:de9d1462a835 82 uint16_t _row;
dreschpe 0:de9d1462a835 83
dreschpe 0:de9d1462a835 84 // colours
dreschpe 0:de9d1462a835 85 uint16_t _foreground;
dreschpe 0:de9d1462a835 86 uint16_t _background;
dreschpe 0:de9d1462a835 87 char *_path;
dreschpe 0:de9d1462a835 88 };
dreschpe 0:de9d1462a835 89
dreschpe 0:de9d1462a835 90 #endif