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