119 lines
3.3 KiB
C++
119 lines
3.3 KiB
C++
/*
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* libhello.cpp
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* Sample shared GUI library for MontaukOS
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* Creates a window and renders text as a demo of the shared library + GUI system
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* Copyright (c) 2026 Daniel Hammer
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*/
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#include <montauk/syscall.h>
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#include <gui/truetype.hpp>
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// Heap allocation test - allocates, writes, reads, frees
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// Returns 0 on success, -1 on failure
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extern "C" int hello_malloc_test() {
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// Test 1: Allocate 256 bytes
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void* buf = montauk::malloc(256);
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if (!buf) {
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montauk::print(" [libhello] malloc(256) failed\n");
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return -1;
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}
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// Test 2: Write a pattern and verify it
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uint8_t* bytes = (uint8_t*)buf;
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for (int i = 0; i < 256; i++) {
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bytes[i] = (uint8_t)(i & 0xFF);
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}
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for (int i = 0; i < 256; i++) {
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if (bytes[i] != (uint8_t)(i & 0xFF)) {
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montauk::print(" [libhello] read verification failed\n");
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montauk::mfree(buf);
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return -1;
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}
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}
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montauk::mfree(buf);
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return 0;
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}
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extern "C" int hello_run() {
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// Create window
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static constexpr int kInitialWidth = 320;
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static constexpr int kInitialHeight = 200;
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static constexpr uint32_t kBackgroundColor = 0xFFFFFFFF;
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montauk::abi::WinCreateResult wres;
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if (montauk::win_create("libhello Demo", kInitialWidth, kInitialHeight, &wres) < 0 || wres.id < 0) {
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return -1;
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}
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int winId = wres.id;
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uint32_t* pixels = (uint32_t*)(uintptr_t)wres.pixelVa;
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int width = kInitialWidth;
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int height = kInitialHeight;
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gui::TrueTypeFont* font = (gui::TrueTypeFont*)montauk::malloc(sizeof(gui::TrueTypeFont));
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if (!font) {
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montauk::win_destroy(winId);
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return -1;
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}
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montauk::memset(font, 0, sizeof(gui::TrueTypeFont));
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if (!font->init("0:/fonts/Roboto-Medium.ttf")) {
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montauk::mfree(font);
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montauk::win_destroy(winId);
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return -1;
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}
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// Simple render - fill with a color pattern
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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pixels[y * width + x] = kBackgroundColor;
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}
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}
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// Render text using TrueType
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gui::Color text_color;
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text_color.r = 0x11;
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text_color.g = 0x11;
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text_color.b = 0x11;
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text_color.a = 255;
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font->draw_to_buffer(pixels, width, height, 20, 20, "Hello from libhello!", text_color, 16);
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// Present the initial frame
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montauk::win_present(winId);
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// Event loop
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while (true) {
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montauk::abi::WinEvent ev;
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int r = montauk::win_poll(winId, &ev);
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if (r < 0) {
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break;
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}
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if (r == 0) {
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montauk::sleep_ms(16);
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continue;
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}
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if (ev.type == 3) { // close
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break;
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}
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if (ev.type == 2) { // resize
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width = ev.resize.w;
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height = ev.resize.h;
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pixels = (uint32_t*)(uintptr_t)montauk::win_resize(winId, width, height);
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// Re-render on resize
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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pixels[y * width + x] = kBackgroundColor;
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}
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}
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font->draw_to_buffer(pixels, width, height, 20, 20, "Hello from libhello!", text_color, 16);
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montauk::win_present(winId);
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}
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}
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montauk::win_destroy(winId);
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montauk::mfree(font);
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return 0;
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}
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