refactor file structure

2026-10-06 12:07:12 +02:00
parent 6ee6b1482b
commit 18b7df5f0c
14 changed files with 204 additions and 217 deletions
@@ -0,0 +1,146 @@
+// rendering characters in the framebuffer
+
+#include <dangerzone/engine.h>
+#include <dangerzone/render/rect.h>
+#include <dangerzone/render/text.h>
+
+#include "internal/engine_internal.h"
+
+/*
+ * each character has 8 rows
+ * only the lower 4 bits of each byte are used
+ */
+static const uint8_t font[128][FONT_ROWS] = {
+    [' '] = { 0, 0, 0, 0, 0, 0, 0 },
+
+    ['A'] = { 0x0E, 0x11, 0x11, 0x1F, 0x11, 0x11, 0x11 },
+    ['B'] = { 0x1E, 0x11, 0x11, 0x1E, 0x11, 0x11, 0x1E },
+    ['C'] = { 0x0F, 0x10, 0x10, 0x10, 0x10, 0x10, 0x0F },
+    ['D'] = { 0x1E, 0x11, 0x11, 0x11, 0x11, 0x11, 0x1E },
+    ['E'] = { 0x1F, 0x10, 0x10, 0x1E, 0x10, 0x10, 0x1F },
+    ['F'] = { 0x1F, 0x10, 0x10, 0x1E, 0x10, 0x10, 0x10 },
+    ['G'] = { 0x0F, 0x10, 0x10, 0x17, 0x11, 0x11, 0x0F },
+    ['H'] = { 0x11, 0x11, 0x11, 0x1F, 0x11, 0x11, 0x11 },
+    ['I'] = { 0x1F, 0x04, 0x04, 0x04, 0x04, 0x04, 0x1F },
+    ['J'] = { 0x01, 0x01, 0x01, 0x01, 0x11, 0x11, 0x0E },
+    ['K'] = { 0x11, 0x12, 0x14, 0x18, 0x14, 0x12, 0x11 },
+    ['L'] = { 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x1F },
+    ['M'] = { 0x11, 0x1B, 0x15, 0x15, 0x11, 0x11, 0x11 },
+    ['N'] = { 0x11, 0x19, 0x15, 0x13, 0x11, 0x11, 0x11 },
+    ['O'] = { 0x0E, 0x11, 0x11, 0x11, 0x11, 0x11, 0x0E },
+    ['P'] = { 0x1E, 0x11, 0x11, 0x1E, 0x10, 0x10, 0x10 },
+    ['Q'] = { 0x0E, 0x11, 0x11, 0x11, 0x15, 0x12, 0x0D },
+    ['R'] = { 0x1E, 0x11, 0x11, 0x1E, 0x14, 0x12, 0x11 },
+    ['S'] = { 0x0F, 0x10, 0x10, 0x0E, 0x01, 0x01, 0x1E },
+    ['T'] = { 0x1F, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04 },
+    ['U'] = { 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x0E },
+    ['V'] = { 0x11, 0x11, 0x11, 0x11, 0x11, 0x0A, 0x04 },
+    ['W'] = { 0x11, 0x11, 0x11, 0x15, 0x15, 0x15, 0x0A },
+    ['X'] = { 0x11, 0x11, 0x0A, 0x04, 0x0A, 0x11, 0x11 },
+    ['Y'] = { 0x11, 0x11, 0x0A, 0x04, 0x04, 0x04, 0x04 },
+    ['Z'] = { 0x1F, 0x01, 0x02, 0x04, 0x08, 0x10, 0x1F },
+
+    ['0'] = { 0x0E, 0x11, 0x13, 0x15, 0x19, 0x11, 0x0E },
+    ['1'] = { 0x04, 0x0C, 0x04, 0x04, 0x04, 0x04, 0x0E },
+    ['2'] = { 0x0E, 0x11, 0x01, 0x02, 0x04, 0x08, 0x1F },
+    ['3'] = { 0x1E, 0x01, 0x01, 0x0E, 0x01, 0x01, 0x1E },
+    ['4'] = { 0x02, 0x06, 0x0A, 0x12, 0x1F, 0x02, 0x02 },
+    ['5'] = { 0x1F, 0x10, 0x10, 0x1E, 0x01, 0x01, 0x1E },
+    ['6'] = { 0x0E, 0x10, 0x10, 0x1E, 0x11, 0x11, 0x0E },
+    ['7'] = { 0x1F, 0x01, 0x02, 0x04, 0x08, 0x08, 0x08 },
+    ['8'] = { 0x0E, 0x11, 0x11, 0x0E, 0x11, 0x11, 0x0E },
+    ['9'] = { 0x0E, 0x11, 0x11, 0x0F, 0x01, 0x01, 0x0E },
+
+    ['.'] = { 0, 0, 0, 0, 0, 0x0C, 0x0C },
+    [','] = { 0, 0, 0, 0, 0, 0x0C, 0x08 },
+    [':'] = { 0, 0x0C, 0x0C, 0, 0, 0x0C, 0x0C },
+    [';'] = { 0, 0x0C, 0x0C, 0, 0, 0x0C, 0x08 },
+    ['!'] = { 0x04, 0x04, 0x04, 0x04, 0x04, 0, 0x04 },
+    ['?'] = { 0x0E, 0x11, 0x01, 0x02, 0x04, 0, 0x04 },
+    ['-'] = { 0, 0, 0, 0x1F, 0, 0, 0 },
+    ['_'] = { 0, 0, 0, 0, 0, 0, 0x1F },
+    ['+'] = { 0, 0x04, 0x04, 0x1F, 0x04, 0x04, 0 },
+    ['='] = { 0, 0x1F, 0, 0, 0x1F, 0, 0 },
+    ['/'] = { 0x01, 0x01, 0x02, 0x04, 0x08, 0x10, 0x10 },
+    ['\\'] = { 0x10, 0x10, 0x08, 0x04, 0x02, 0x01, 0x01 },
+    ['('] = { 0x02, 0x04, 0x08, 0x08, 0x08, 0x04, 0x02 },
+    [')'] = { 0x08, 0x04, 0x02, 0x02, 0x02, 0x04, 0x08 },
+    ['['] = { 0x0E, 0x08, 0x08, 0x08, 0x08, 0x08, 0x0E },
+    [']'] = { 0x0E, 0x02, 0x02, 0x02, 0x02, 0x02, 0x0E },
+    ['<'] = { 0x02, 0x04, 0x08, 0x10, 0x08, 0x04, 0x02 },
+    ['>'] = { 0x08, 0x04, 0x02, 0x01, 0x02, 0x04, 0x08 },
+    ['*'] = { 0, 0x15, 0x0E, 0x1F, 0x0E, 0x15, 0 },
+    ['#'] = { 0x0A, 0x0A, 0x1F, 0x0A, 0x1F, 0x0A, 0x0A },
+    ['%'] = { 0x19, 0x19, 0x02, 0x04, 0x08, 0x13, 0x13 },
+    ['@'] = { 0x0E, 0x11, 0x17, 0x15, 0x17, 0x10, 0x0F }
+};
+
+/**
+ * put a char 'c' on 'x' and 'y' in the framebuffer
+ * with a foreground color of 'color'
+ */
+void
+put_char(
+    char c,
+    uint32_t x,
+    uint32_t y,
+    uint32_t size,
+    uint32_t fg_color,
+    uint32_t bg_color
+) {
+    // convert lowercase letters to uppercase
+    if (c >= 'a' && c <= 'z') {
+        c -= 'a' - 'A';
+    }
+
+    // avoid indexing outside font[128]
+    if ((unsigned char)c >= 128) {
+        c = '?';
+    }
+
+    for (uint32_t row = 0; row < FONT_ROWS; row++) {
+        uint8_t bits = font[(unsigned char)c][row];
+
+        for (uint32_t col = 0; col < FONT_COLS; col++) {
+            uint32_t color =
+                bits & (1u << (FONT_COLS - 1 - col))
+                    ? fg_color : bg_color;
+
+            put_rect(
+                x + col * size,
+                y + row * size,
+                size,
+                size,
+                color
+            );
+        }
+    }
+
+    mark_dirty_rect(x, y, size, size);
+}
+
+void
+put_string(
+    const char *text,
+    uint32_t x,
+    uint32_t y,
+    uint32_t size,
+    uint32_t spacing,
+    uint32_t line_spacing,
+    uint32_t fg_color,
+    uint32_t bg_color
+) {
+    uint32_t start_x = x;
+
+    while (*text) {
+        if (*text == '\n') {
+            x = start_x;
+            y += (FONT_ROWS + line_spacing) * size;
+        } else {
+            put_char(*text, x, y, size, fg_color, bg_color);
+            x += (FONT_COLS + spacing) * size;
+        }
+
+        text++;
+    }
+}