feat: add experimental game engine & demo game, fix ACPI events

2026-03-18 14:26:50 +01:00
parent ffffb6a0c5
commit b5d2cc515c
42 changed files with 2237 additions and 12 deletions
@@ -0,0 +1,114 @@
+/*
+ * ui.h
+ * MontaukOS 2D Game Engine - UI Rendering
+ * Health bars, text overlays, dialog boxes, menus
+ * Copyright (c) 2026 Daniel Hammer
+ */
+
+#pragma once
+#include <cstdint>
+#include "engine/engine.h"
+
+extern "C" {
+#include <stdio.h>
+}
+
+namespace engine {
+
+// ============================================================================
+// Health / stat bar
+// ============================================================================
+
+inline void draw_bar(Engine& eng, int x, int y, int w, int h,
+                     int value, int max_value,
+                     uint32_t fill_color, uint32_t bg_color,
+                     uint32_t border_color) {
+    eng.fill_rect(x, y, w, h, bg_color);
+    if (max_value > 0 && value > 0) {
+        int fw = (value * (w - 2)) / max_value;
+        if (fw < 1) fw = 1;
+        eng.fill_rect(x + 1, y + 1, fw, h - 2, fill_color);
+    }
+    eng.draw_rect_outline(x, y, w, h, border_color);
+}
+
+// ============================================================================
+// Text box / dialog
+// ============================================================================
+
+inline void draw_dialog(Engine& eng, int x, int y, int w, int h,
+                        const char* text, gui::Color text_color,
+                        int font_size = 16) {
+    // Background with border
+    eng.fill_rect(x, y, w, h, 0xF0FFFFFF);
+    eng.draw_rect_outline(x, y, w, h, 0xFF333333);
+    eng.draw_rect_outline(x + 1, y + 1, w - 2, h - 2, 0xFFCCCCCC);
+
+    // Text (with word wrapping)
+    int tx = x + 8;
+    int ty = y + 6;
+    int max_w = w - 16;
+    int line_h = eng.text_height(font_size) + 2;
+
+    // Simple word wrap
+    char line_buf[128];
+    int li = 0;
+    const char* p = text;
+    while (*p) {
+        li = 0;
+        while (*p && *p != '\n') {
+            // Save state before adding next word
+            int word_start = li;
+            const char* word_p = p;
+
+            while (*p && *p != ' ' && *p != '\n' && li < 126) {
+                line_buf[li++] = *p++;
+            }
+            line_buf[li] = '\0';
+
+            // Check width
+            if (eng.text_width(line_buf, font_size) > max_w && word_start > 0) {
+                // Line too long - rewind to before this word
+                li = word_start;
+                if (li > 0 && line_buf[li - 1] == ' ') li--;
+                line_buf[li] = '\0';
+                p = word_p; // rewind pointer to retry this word on next line
+                break;
+            }
+
+            if (*p == ' ') { line_buf[li++] = ' '; p++; }
+        }
+        line_buf[li] = '\0';
+        if (*p == '\n') p++;
+
+        if (ty + line_h > y + h - 4) break;
+        eng.draw_text(tx, ty, line_buf, text_color, font_size);
+        ty += line_h;
+    }
+}
+
+// ============================================================================
+// Prompt bar (bottom of screen)
+// ============================================================================
+
+inline void draw_prompt(Engine& eng, const char* text, int font_size = 14) {
+    int bar_h = eng.text_height(font_size) + 8;
+    int y = eng.screen_h - bar_h;
+    eng.fill_rect_alpha(0, y, eng.screen_w, bar_h, 0xCC000000);
+    int tw = eng.text_width(text, font_size);
+    eng.draw_text((eng.screen_w - tw) / 2, y + 4, text,
+                  gui::Color::from_rgb(0xFF, 0xFF, 0xFF), font_size);
+}
+
+// ============================================================================
+// Simple HUD text
+// ============================================================================
+
+inline void draw_hud_text(Engine& eng, int x, int y,
+                          const char* text, gui::Color c, int size = 14) {
+    // Draw shadow first for readability
+    eng.draw_text(x + 1, y + 1, text, gui::Color::from_rgba(0, 0, 0, 180), size);
+    eng.draw_text(x, y, text, c, size);
+}
+
+} // namespace engine