Font and text drawing routines.
Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
#include "compiler.h"
#include "stddef.h"
#include "assert.h"
#include "gfx.h"
#include "gfx_text.h"
Macros | |
#define | CONFIG_FONT_PIXELS_PER_BYTE 8 |
#define | EXTMEM_BUF_SIZE 20 |
Functions | |
void | gfx_draw_char (const char c, const gfx_coord_t x, const gfx_coord_t y, const struct font *font, const gfx_color_t bg_color, const gfx_color_t text_color) |
Draws a character to the display. More... | |
static void | gfx_draw_char_hugemem (const char ch, const gfx_coord_t x, const gfx_coord_t y, const struct font *font, const gfx_color_t color) |
Helper function that draws a character from a font in hugemem to the display. More... | |
static void | gfx_draw_char_progmem (const char ch, const gfx_coord_t x, const gfx_coord_t y, const struct font *font, const gfx_color_t color) |
Helper function that draws a character from a font in progmem to the display. More... | |
void | gfx_draw_progmem_string (char PROGMEM_PTR_T str, gfx_coord_t x, gfx_coord_t y, const struct font *font, const gfx_color_t bg_color, const gfx_color_t text_color) |
Draws a string located in program memory to the display. More... | |
void | gfx_draw_progmem_string_aligned (char PROGMEM_PTR_T str, gfx_coord_t x, gfx_coord_t y, const struct font *font, const gfx_color_t bg_color, const gfx_color_t text_color, enum gfx_text_position text_pos, enum gfx_text_alignment text_align) |
Draws an aligned string located in program memory to the display. More... | |
void | gfx_draw_string (const char *str, gfx_coord_t x, gfx_coord_t y, const struct font *font, const gfx_color_t bg_color, const gfx_color_t text_color) |
Draws a string to the display. More... | |
void | gfx_draw_string_aligned (const char *str, gfx_coord_t x, gfx_coord_t y, const struct font *font, const gfx_color_t bg_color, const gfx_color_t text_color, enum gfx_text_position text_pos, enum gfx_text_alignment text_align) |
Draws an aligned string to the display. More... | |
void | gfx_get_progmem_string_bounding_box (char PROGMEM_PTR_T str, const struct font *font, gfx_coord_t *width, gfx_coord_t *height) |
Computes the bounding box of a string located in program memory. More... | |
void | gfx_get_string_bounding_box (const char *str, const struct font *font, gfx_coord_t *width, gfx_coord_t *height) |
Computes the bounding box of a string. More... | |
#define CONFIG_FONT_PIXELS_PER_BYTE 8 |
Referenced by gfx_draw_char_hugemem(), and gfx_draw_char_progmem().
#define EXTMEM_BUF_SIZE 20 |
Referenced by gfx_draw_char_hugemem().
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static |
Helper function that draws a character from a font in hugemem to the display.
This function will first calculate the start offset in the font character data before iterating over the specific character data.
Only pixels in the character that should be enabled are done so, the caller is required to prepare the drawing area before printing a character to it. This is done by the gfx_draw_string() and gfx_draw_progmem_string() functions.
ch | Character to be drawn |
x | X coordinate on screen. |
y | Y coordinate on screen. |
font | Font to draw character in |
color | Foreground color to draw the character in |
References Assert, CONFIG_FONT_PIXELS_PER_BYTE, font::data, EXTMEM_BUF_SIZE, font::first_char, gfx_draw_pixel(), font::height, and font::width.
Referenced by gfx_draw_char().
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static |
Helper function that draws a character from a font in progmem to the display.
This function will first calculate the start offset in the font character data before iterating over the specific character data.
Only pixels in the character that should be enabled are done so, the caller is required to prepare the drawing area before printing a character to it. This is done by the gfx_draw_string() and gfx_draw_progmem_string() functions.
ch | Character to be drawn |
x | X coordinate on screen. |
y | Y coordinate on screen. |
font | Font to draw character in |
color | Foreground color to draw the character in |
References Assert, CONFIG_FONT_PIXELS_PER_BYTE, font::data, font::first_char, gfx_draw_pixel(), font::height, font::progmem, PROGMEM_PTR_T, PROGMEM_READ_BYTE, and font::width.
Referenced by gfx_draw_char().