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LeeLeahy2LeeLeahy2
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Add makefile and the Fonts support program
Fonts: Program to draw text diagrams of each character in the font file. Example: ./Fonts Arduino/libraries/SparkFun_Qwiic_OLED_Graphics_Library/src/res/_fnt_5x7.h Icons: Program to draw text diagrams of each icon in the icon file. Example: ./Icons Firmware/RTK_Surveyor/icons.h makefile: Build script to build the Fonts and Icons programs.
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‎Graphics/C/Fonts.c‎

Lines changed: 349 additions & 0 deletions
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#include <fcntl.h>
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#include <malloc.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#define DRAW_OUTLINE 1
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typedef struct _CHARACTER_ENTRY {
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struct _CHARACTER_ENTRY * next;
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int character;
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uint8_t data[];
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} CHARACTER_ENTRY;
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int bytes_high;
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CHARACTER_ENTRY * character_list;
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int data_bytes;
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char * font_text;
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uint8_t * font_data;
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int height;
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int map_width;
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int nchar;
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int start;
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int width;
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int
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read_value (
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const char * string,
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const char * text_end
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)
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{
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const char * text;
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int length;
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int value;
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// Find the map width
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text = font_text;
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length = strlen(string);
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while (text < text_end) {
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if (strncmp (text, string, length) == 0) {
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text += length;
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break;
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}
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text++;
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}
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// Skip over the white space
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while (text < text_end) {
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if ((*text != ' ') && (*text != '\t'))
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break;
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text++;
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}
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// Get the map width
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if (sscanf (text, "%d", &value) != 1) {
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fprintf (stderr, "ERROR - Invalid map width!\n");
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return -1;
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}
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return value;
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}
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const char *
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find_next_character (
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const char * text,
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const char * text_end
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)
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{
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// Walk through the font file
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while (text < (text_end - 2)) {
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// Determine if this is an icon name
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if ((text[0] == '0') && ((text[1] == 'x') || (text[1] == 'X')))
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return text;
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text++;
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}
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// No more data
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return NULL;
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}
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int
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read_data (
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const char * text_end
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)
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{
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int character_count;
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const char * text;
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int data_offset;
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int index;
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unsigned int value;
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// Read the data array
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character_count = 0;
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text = font_text;
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while (text < text_end) {
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for (index = 0; index < data_bytes; index++) {
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// Find the next data value
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text = find_next_character (text, text_end);
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if ((text == NULL) && (index == 0))
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return character_count;
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else if (text == NULL) {
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fprintf (stderr, "ERROR - Missing data!\n");
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return 0;
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}
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// Get the value
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if (sscanf (text, "0x%02x", &value) != 1) {
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fprintf (stderr, "ERROR - Invalid data value!\n");
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return 0;
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}
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text += 4;
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// Save the data value
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data_offset = (data_bytes * character_count) + index;
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font_data[data_offset] = value;
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}
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character_count++;
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}
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return 0;
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}
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void
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add_entry (
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CHARACTER_ENTRY * new_entry
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)
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{
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CHARACTER_ENTRY * previous_entry;
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// Walk to the end of the list
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previous_entry = character_list;
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while (previous_entry && previous_entry->next)
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previous_entry = previous_entry->next;
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// Add this entry to the list
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new_entry->next = NULL;
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if (previous_entry)
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previous_entry->next = new_entry;
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else
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character_list = new_entry;
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}
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int
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process_data (
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int character_count
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)
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{
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int font_index;
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int index;
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int map_characters;
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int map_offset;
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int next_character;
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CHARACTER_ENTRY * new_entry;
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ssize_t offset;
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unsigned int value;
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int x;
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int y;
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next_character = start;
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map_characters = map_width / width;
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while ((next_character - start) < character_count) {
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// Allocate the data structure
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new_entry = malloc (sizeof(*new_entry) + data_bytes);
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if (!new_entry) {
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fprintf (stderr, "ERROR - Failed to allocate next_entry!\n");
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return -1;
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}
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new_entry->character = next_character++;
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map_offset = new_entry->character - start;
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map_offset = ((map_offset / map_characters) * map_characters * data_bytes)
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+ ((map_offset % map_characters) * width);
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for (y = 0; y < bytes_high; y++) {
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for (x = 0; x < width; x++) {
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// Save the data value
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font_index = map_offset + (y * map_width) + x;
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value = font_data[font_index];
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index = (y * width) + x;
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new_entry->data[index] = value;
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}
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}
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// Add the entry to the list
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add_entry (new_entry);
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}
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return 0;
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}
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void
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display_character (
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CHARACTER_ENTRY * character
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)
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{
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int bit;
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const char * indent = " ";
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int x;
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int y;
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printf ("/*\n");
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printf (" 0x%02x, %d [%d, %d]\n", character->character, character->character, width, height);
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printf ("\n");
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#ifdef DRAW_OUTLINE
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printf ("%s.", indent);
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for (x = 0; x < width; x++)
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printf ("-");
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printf (".\n");
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#endif // DRAW_OUTLINE
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for (y = 0; y < height; y++) {
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printf ("%s", indent);
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#ifdef DRAW_OUTLINE
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printf ("|");
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#endif // DRAW_OUTLINE
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for (x = 0; x < width; x++) {
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bit = character->data[((y >> 3) * width) + x];
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bit >>= y & 7;
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printf ("%c", (bit & 1) ? '*' : ' ');
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}
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#ifdef DRAW_OUTLINE
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printf ("|");
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#endif // DRAW_OUTLINE
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printf ("\n");
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}
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#ifdef DRAW_OUTLINE
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printf ("%s'", indent);
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for (x = 0; x < width; x++)
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printf ("-");
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printf ("'\n");
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#endif // DRAW_OUTLINE
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printf ("*/\n");
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printf ("\n");
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}
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int
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main (
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int argc,
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char ** argv
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)
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{
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CHARACTER_ENTRY * character;
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int character_count;
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const char * text_end;
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char * filename;
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int font_file;
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off_t file_length;
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int status;
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ssize_t valid_data;
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do {
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// Assume failure
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font_file = -1;
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status = -1;
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// Verify the argument count
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if (argc != 2) {
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fprintf (stderr, "%s font_fliename\n", argv[0]);
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break;
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}
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// Get the font file name
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filename = argv[1];
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// Open the font file
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font_file = open (filename, O_RDONLY);
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if (font_file < 0) {
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perror("ERROR - File open failed!");
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break;
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}
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// Determine the length of the file
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file_length = lseek (font_file, 0, SEEK_END);
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// Go the the beginning of the file
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lseek (font_file, 0, SEEK_SET);
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// Allocate the text buffer
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font_text = malloc (file_length);
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if (!font_text) {
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fprintf (stderr, "ERROR - Failed to allocate font text buffer!\n");
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break;
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}
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// Fill the text buffer
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valid_data = read (font_file, font_text, file_length);
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if (valid_data < 0) {
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fprintf (stderr, "ERROR - File read failed!\n");
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break;
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}
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text_end = &font_text[valid_data];
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// Find the font values
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width = read_value ("WIDTH", text_end);
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if (width < 0) {
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fprintf (stderr, "ERROR - Failed to read font width!\n");
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}
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height = read_value ("HEIGHT", text_end);
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if (height < 0) {
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fprintf (stderr, "ERROR - Failed to read font height!\n");
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break;
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}
301+
start = read_value ("START", text_end);
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if (start < 0) {
303+
fprintf (stderr, "ERROR - Failed to read font start!\n");
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break;
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}
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nchar = read_value ("NCHAR", text_end);
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if (nchar < 0) {
308+
fprintf (stderr, "ERROR - Failed to read font nchar!\n");
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break;
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}
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map_width = read_value ("MAP_WIDTH", text_end);
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if (map_width < 0) {
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fprintf (stderr, "ERROR - Failed to read map width!\n");
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break;
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}
316+
bytes_high = (height + 7) / 8;
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data_bytes = width * bytes_high;
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// Allocate the data buffer
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font_data = malloc (sizeof(*font_data) * 256 * data_bytes);
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if (!font_data) {
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fprintf (stderr, "ERROR - Failed to allocate font data buffer!\n");
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break;
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}
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// Fill the data buffer
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character_count = read_data (text_end);
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// Process the data
330+
if (process_data(character_count))
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break;
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// Display the characters in the font file
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character = character_list;
335+
while (character) {
336+
display_character (character);
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character = character->next;
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}
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// Indicate success
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status = 0;
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} while (0);
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// Close the file
345+
if (font_file >= 0)
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close(font_file);
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return status;
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}

‎Graphics/C/Icons.c‎

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -47,7 +47,7 @@ terminate_end_of_line (
4747
text++;
4848

4949
// Skip over the end of line
50-
while ((text < text_end) && (*text == '\r') || (*text == '\n'))
50+
while ((text < text_end) && ((*text == '\r') || (*text == '\n')))
5151
*text++ = 0;
5252

5353
// Return the start of the next line
@@ -151,7 +151,7 @@ read_icon_data (
151151
ICON_ENTRY * icon_entry;
152152
int index;
153153
char * number;
154-
int value;
154+
unsigned int value;
155155
int x;
156156
int y;
157157

@@ -410,8 +410,8 @@ display_icon (
410410
}
411411
for (y = 0; y < icon->height; y++) {
412412
printf ("%s", indent);
413-
if (DRAW_OUTLINE)
414-
printf ("0x%02x|", 1 << (y & 7));
413+
if (DRAW_OUTLINE)
414+
printf ("0x%02x|", 1 << (y & 7));
415415
for (x = 0; x < icon->width; x++) {
416416
bit = icon->data[((y >> 3) * icon->bytes_wide) + x];
417417
bit >>= y & 7;

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