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mancausoftmancausoft
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Add clock design with digital time and seconds marker
Closes #6
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3 files changed

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3 files changed

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‎pixelwall/Makefile‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -23,7 +23,8 @@ OBJECTS = \
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design_pong.o \
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design_life.o \
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design_cm5.o \
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design_text_arcade.o
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design_text_arcade.o \
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design_clock.o
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.PHONY: all
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all: $(PROGRAM)

‎pixelwall/design_clock.c‎

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@@ -0,0 +1,194 @@
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/*
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DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
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Version 2, December 2004
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Copyright (C) 2004 Sam Hocevar <[email protected]>
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Everyone is permitted to copy and distribute verbatim or modified
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copies of this license document, and changing it is allowed as long
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as the name is changed.
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DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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0. You just DO WHAT THE FUCK YOU WANT TO.
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*/
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#include "pixelwall.h"
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// 3x6 seven-segment digit bitmaps (3 bits per row, MSB = col 0)
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// Row layout: top bar, upper verticals, middle bar,
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// lower verticals, lower verticals, bottom bar
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static const uint8_t digitFont[10][6] = {
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{0x7, 0x5, 0x5, 0x5, 0x5, 0x7}, // 0
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{0x2, 0x6, 0x2, 0x2, 0x2, 0x7}, // 1
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{0x7, 0x1, 0x7, 0x4, 0x4, 0x7}, // 2
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{0x7, 0x1, 0x7, 0x1, 0x1, 0x7}, // 3
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{0x5, 0x5, 0x7, 0x1, 0x1, 0x1}, // 4
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{0x7, 0x4, 0x7, 0x1, 0x1, 0x7}, // 5
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{0x7, 0x4, 0x4, 0x7, 0x5, 0x7}, // 6
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{0x7, 0x1, 0x1, 0x1, 0x1, 0x1}, // 7
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{0x7, 0x5, 0x7, 0x5, 0x5, 0x7}, // 8
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{0x7, 0x5, 0x7, 0x1, 0x1, 0x7}, // 9
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};
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#define DIGIT_W 3
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#define DIGIT_H 6
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#define DIGIT_TOP_ROW 5 // (16 - 6) / 2, vertically centered
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// Horizontal column positions for HH:MM layout
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// margin(2) + H1(3) + gap(1) + H0(3) + gap(1) + colon(2) + gap(1) + M1(3) + gap(1) + M0(3) + margin(2) = 22
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#define COL_H1 2
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#define COL_H0 6
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#define COL_COLON 10
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#define COL_M1 13
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#define COL_M0 17
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typedef struct {
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Color digitColor;
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Color markerColor;
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} ClockConf;
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static ClockConf defaultClockConf = {
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.digitColor = GREEN,
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.markerColor = GREEN,
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};
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static void ParseOptions(ClockConf *conf, int argc, char *argv[]) {
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int opt;
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optind = 1;
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while ((opt = getopt(argc, argv, ":T:S:")) != -1) {
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switch (opt) {
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case 'T': conf->digitColor = ParseColor(optarg); break;
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case 'S': conf->markerColor = ParseColor(optarg); break;
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}
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}
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}
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static void PrintHelp() {
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printf(" -T <color> Digit color (default: green)\n");
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printf(" -S <color> Seconds marker color (default: green)\n");
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}
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static void DrawDigit(Grid *grid, int digit, int startCol, Color color) {
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for (int r = 0; r < DIGIT_H; r++) {
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uint8_t row = digitFont[digit][r];
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for (int c = 0; c < DIGIT_W; c++) {
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if (row & (0x4 >> c)) {
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Pos pos = {startCol + c, DIGIT_TOP_ROW + r};
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GridSetColor(grid, pos, color);
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}
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}
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}
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}
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static void DrawColon(Grid *grid, int startCol, Color color, int sec) {
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// Animated 2x6 colon: two dots that alternate diagonal position
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// Even seconds: top-left (#.) and bottom-right (.#)
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// Odd seconds: top-right (.#) and bottom-left (#.)
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if (sec % 2 == 0) {
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GridSetColor(grid, (Pos){startCol, DIGIT_TOP_ROW}, color);
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GridSetColor(grid, (Pos){startCol + 1, DIGIT_TOP_ROW + 5}, color);
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} else {
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GridSetColor(grid, (Pos){startCol + 1, DIGIT_TOP_ROW}, color);
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GridSetColor(grid, (Pos){startCol, DIGIT_TOP_ROW + 5}, color);
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}
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}
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static void *Create(Grid *grid, int argc, char *argv[]) {
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ClockConf *conf = (ClockConf *)malloc(sizeof(ClockConf));
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if (!conf) return NULL;
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*conf = defaultClockConf;
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ParseOptions(conf, argc, argv);
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return conf;
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}
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static void UpdateFrame(Grid *grid, void *data) {
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ClockConf *conf = (ClockConf *)data;
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GridFillColor(grid, grid->conf.backgroundColor);
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time_t now = time(NULL);
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struct tm *t = localtime(&now);
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int hour = t->tm_hour;
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int min = t->tm_min;
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int sec = t->tm_sec;
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// Draw digits
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DrawDigit(grid, hour / 10, COL_H1, conf->digitColor);
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DrawDigit(grid, hour % 10, COL_H0, conf->digitColor);
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DrawColon(grid, COL_COLON, conf->digitColor, sec);
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DrawDigit(grid, min / 10, COL_M1, conf->digitColor);
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DrawDigit(grid, min % 10, COL_M0, conf->digitColor);
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// Draw seconds marker: 12 evenly spaced positions around the perimeter
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// Corners use L-shaped 3 pixels, edges use 2 pixels
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int slot = sec / 5;
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Color mc = conf->markerColor;
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switch (slot) {
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case 0: // :00 top center
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GridSetColor(grid, (Pos){10, 0}, mc);
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GridSetColor(grid, (Pos){11, 0}, mc);
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break;
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case 1: // :05 top right
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GridSetColor(grid, (Pos){15, 0}, mc);
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GridSetColor(grid, (Pos){16, 0}, mc);
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break;
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case 2: // :10 top-right corner
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GridSetColor(grid, (Pos){20, 0}, mc);
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GridSetColor(grid, (Pos){21, 0}, mc);
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GridSetColor(grid, (Pos){21, 1}, mc);
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break;
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case 3: // :15 right middle
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GridSetColor(grid, (Pos){21, 6}, mc);
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GridSetColor(grid, (Pos){21, 7}, mc);
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break;
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case 4: // :20 bottom-right corner
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GridSetColor(grid, (Pos){21, 14}, mc);
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GridSetColor(grid, (Pos){21, 15}, mc);
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GridSetColor(grid, (Pos){20, 15}, mc);
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break;
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case 5: // :25 bottom right
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GridSetColor(grid, (Pos){15, 15}, mc);
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GridSetColor(grid, (Pos){16, 15}, mc);
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break;
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case 6: // :30 bottom center
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GridSetColor(grid, (Pos){10, 15}, mc);
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GridSetColor(grid, (Pos){11, 15}, mc);
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break;
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case 7: // :35 bottom left
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GridSetColor(grid, (Pos){5, 15}, mc);
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GridSetColor(grid, (Pos){6, 15}, mc);
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break;
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case 8: // :40 bottom-left corner
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GridSetColor(grid, (Pos){1, 15}, mc);
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GridSetColor(grid, (Pos){0, 15}, mc);
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GridSetColor(grid, (Pos){0, 14}, mc);
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break;
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case 9: // :45 left middle
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GridSetColor(grid, (Pos){0, 7}, mc);
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GridSetColor(grid, (Pos){0, 6}, mc);
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break;
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case 10: // :50 top-left corner
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GridSetColor(grid, (Pos){0, 1}, mc);
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GridSetColor(grid, (Pos){0, 0}, mc);
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GridSetColor(grid, (Pos){1, 0}, mc);
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break;
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case 11: // :55 top left
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GridSetColor(grid, (Pos){5, 0}, mc);
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GridSetColor(grid, (Pos){6, 0}, mc);
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break;
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}
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}
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static void Destroy(void *data) {
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free(data);
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}
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Design clockDesign = {
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.name = "clock",
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.PrintHelp = PrintHelp,
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.Create = Create,
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.UpdateFrame = UpdateFrame,
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.Destroy = Destroy,
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};

‎pixelwall/designs.h‎

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Original file line numberDiff line numberDiff line change
@@ -25,6 +25,7 @@ extern Design pongDesign;
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extern Design lifeDesign;
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extern Design cm5Design;
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extern Design arcadeDesign;
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extern Design clockDesign;
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Design *designs[] = {
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&snakeDesign,
@@ -34,4 +35,5 @@ Design *designs[] = {
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&lifeDesign,
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&cm5Design,
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&arcadeDesign,
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&clockDesign,
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};

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