Renesas / AsciiFont

Draw the character of the ASCII code.

Dependents:   mbed-os_Watson-IoT_ZXing_sample mbed-os_Watson-IoT_ZXing_sample MovPlayer GR-PEACH_HVC-P2_sample_client ... more

Fork of AsciiFont by Daiki Kato

AsciiFont

This is a library to draw the ASCII font characters.

Example

#include "mbed.h"
#include "AsciiFont.h"

#define WIDTH           (12)
#define HEIGHT          (16)
#define BYTE_PER_PIXEL  (1u)
#define STRIDE          (((WIDTH * BYTE_PER_PIXEL) + 7u) & ~7u) //multiple of 8

uint8_t text_field[STRIDE * HEIGHT];

//for debug
void print_text_field() {
    int idx = 0;

    for (int i = 0; i < HEIGHT; i++) {
        for (int j = 0; j < STRIDE; j++) {
            printf("%02x", text_field[idx++]);
        }
        printf("\r\n");
    }
    printf("\r\n");
}

int main() {
    AsciiFont ascii_font(text_field, WIDTH, HEIGHT, STRIDE, BYTE_PER_PIXEL);

    ascii_font.Erase(0xcc);
    ascii_font.DrawStr("AB", 0, 0, 0x11, 1);
    ascii_font.DrawChar('C', AsciiFont::CHAR_PIX_WIDTH,
                        AsciiFont::CHAR_PIX_HEIGHT, 0x22, 1);
    print_text_field(); //debug print

    ascii_font.Erase();
    ascii_font.DrawStr("D", 0, 0, 0xef, 2);
    print_text_field(); //debug print

    ascii_font.Erase(0x11, 6, 0, 6, 8);
    print_text_field(); //debug print
}


API

Import library
AsciiFont - AsciiFont Class Reference

Public Member Functions

AsciiFont (uint8_t *p_buf, int width, int height, int stride, int byte_per_pixel, uint32_t const colour=0)
Constructor: Initializes AsciiFont .
void Erase ()
Erase text field.
void Erase (uint32_t const colour)
Erase text field.
void Erase (uint32_t const colour, int x, int y, int width, int height)
Erase text field.
int DrawStr (char *str, int x, int y, uint32_t const colour, int font_size=1, uint16_t const max_char_num=0xffff)
Draw a string.
bool DrawChar (char c, int x, int y, uint32_t const colour, int font_size=1)
Draw a character.

Static Public Attributes

static const int CHAR_PIX_WIDTH = 6
The pixel width of a character.
static const int CHAR_PIX_HEIGHT = 8
The pixel height of a character.

Files at this revision

API Documentation at this revision

Revision 4:8fb5219bbc09, committed 2017-01-23

Comitter:
dkato
Date:
Mon Jan 23 06:20:37 2017 +0000
Parent:
3:0d8bc371d109
Child:
5:1eaa4942db53
Commit message:
Change argument of DrawStr.

Changed in this revision

AsciiFont.cpp Show annotated file Show diff for this revision Revisions of this file
AsciiFont.h Show annotated file Show diff for this revision Revisions of this file 
--- a/AsciiFont.cpp	Mon Oct 03 06:50:04 2016 +0000
+++ b/AsciiFont.cpp	Mon Jan 23 06:20:37 2017 +0000
@@ -31,7 +31,7 @@
     }
 }
 
-int AsciiFont::DrawStr(char * str, int x, int y, uint32_t const colour, int font_size, uint16_t const max_char_num) {
+int AsciiFont::DrawStr(const char * str, int x, int y, uint32_t const colour, int font_size, uint16_t const max_char_num) {
     int char_num = 0;
 
     if ((str == NULL) || (font_size <= 0)) {

--- a/AsciiFont.h	Mon Oct 03 06:50:04 2016 +0000
+++ b/AsciiFont.h	Mon Jan 23 06:20:37 2017 +0000
@@ -99,7 +99,7 @@
      * @param max_char_num The maximum number of characters
      * @return The drawn number of characters
      */
-    int DrawStr(char * str, int x, int y, uint32_t const colour, int font_size = 1, uint16_t const max_char_num = 0xffff);
+    int DrawStr(const char * str, int x, int y, uint32_t const colour, int font_size = 1, uint16_t const max_char_num = 0xffff);
 
     /** Draw a character
      *