Extra2D/examples/resource_loading/main.cpp

#include <extra2d.h>
#include <cstdio>

using namespace extra2d;

/**
 * @brief 资源加载示例
 *
 * 演示如何使用资源管理器加载各种资源：
 * - 纹理 (Texture)
 * - 字体 (Font)
 * - 着色器 (Shader)
 * - 音频 (Audio)
 */

int main(int argc, char **argv) {
    // 创建应用（自动创建窗口）
    auto app = Application::create();

    AppConfig config;
    config.title = "Resource Loading Example";
    config.width = 1280;
    config.height = 720;

    if (!app->init(config)) {
        printf("Failed to initialize!\n");
        return -1;
    }

    // 获取资源管理器
    auto& resources = app->getContext()->resources();

    printf("=== Resource Loading Example ===\n\n");

    // ============================================
    // 1. 加载纹理
    // ============================================
    printf("1. Loading Textures...\n");

    // 从文件加载纹理
    auto texture = resources.getTexture("assets/textures/test.png");
    if (texture) {
        printf("   ✓ Loaded texture: %dx%d\n", texture->getWidth(), texture->getHeight());
    } else {
        printf("   ✗ Failed to load texture (file not found)\n");
    }

    // 使用默认纹理
    auto defaultTex = resources.getDefaultTexture();
    if (defaultTex) {
        printf("   ✓ Default texture available: %dx%d\n",
               defaultTex->getWidth(), defaultTex->getHeight());
    }

    // ============================================
    // 2. 加载字体
    // ============================================
    printf("\n2. Loading Fonts...\n");

    FontConfig fontConfig;
    fontConfig.fontSize = 24;
    fontConfig.preloadCommon = true;  // 预加载常用字符

    auto font = resources.getFont("assets/fonts/font.ttf", fontConfig);
    if (font) {
        printf("   ✓ Loaded font with size %d\n", fontConfig.fontSize);

        // 测试字体测量
        Vec2 textSize = font->measureText("Hello 世界!", 24.0f);
        printf("   ✓ Text 'Hello 世界!' size: %.1f x %.1f\n", textSize.x, textSize.y);

        // 获取字符信息（会自动渲染并缓存）
        const GlyphInfo* glyph = font->getGlyph('A');
        if (glyph && glyph->valid) {
            printf("   ✓ Glyph 'A' cached in atlas page %d\n", glyph->pageIndex);
        }
    } else {
        printf("   ✗ Failed to load font (file not found)\n");
    }

    // ============================================
    // 3. 创建文本对象
    // ============================================
    printf("\n3. Creating Text Objects...\n");

    if (font) {
        auto text = resources.createText(font, "Resource Loading Example\n你好，世界！");
        text->setFontSize(32);
        text->setColor(Color::White);
        text->setAlign(TextAlign::Center);
        text->rebuild();

        Vec2 size = text->getSize();
        printf("   ✓ Created text object: %.1f x %.1f\n", size.x, size.y);
        printf("   ✓ Text has %zu lines\n", text->getLines().size());
    }

    // ============================================
    // 4. 加载着色器
    // ============================================
    printf("\n4. Loading Shaders...\n");

    // 从文件加载着色器
    auto shader = resources.getShader("assets/shaders/sprite.vs",
                                       "assets/shaders/sprite.fs");
    if (shader) {
        printf("   ✓ Loaded shader from files\n");
    } else {
        printf("   ✗ Failed to load shader (files not found)\n");
    }

    // 使用默认着色器
    auto defaultShader = resources.getDefaultShader();
    if (defaultShader) {
        printf("   ✓ Default shader available\n");
    }

    // 从源码创建着色器
    const char* vsSource = R"(
        #version 320 es
        layout(location = 0) in vec2 aPosition;
        layout(location = 1) in vec2 aTexCoord;
        out vec2 vTexCoord;
        void main() {
            gl_Position = vec4(aPosition, 0.0, 1.0);
            vTexCoord = aTexCoord;
        }
    )";

    const char* fsSource = R"(
        #version 320 es
        precision mediump float;
        in vec2 vTexCoord;
        out vec4 fragColor;
        void main() {
            fragColor = vec4(vTexCoord, 0.5, 1.0);
        }
    )";

    auto runtimeShader = resources.getShaderFromSource("runtime_shader", vsSource, fsSource);
    if (runtimeShader) {
        printf("   ✓ Created shader from source\n");
    }

    // ============================================
    // 5. 创建材质
    // ============================================
    printf("\n5. Creating Materials...\n");

    auto material = resources.createMaterial(defaultShader);
    if (material) {
        material->setTexture("uTexture", defaultTex);
        material->setColor("uColor", Color(1.0f, 0.5f, 0.2f, 1.0f));
        material->setFloat("uTime", 0.0f);
        printf("   ✓ Created material with texture and uniforms\n");
    }

    // 注册命名材质以便后续获取
    resources.registerMaterial("sprite_mat", material);
    auto retrievedMat = resources.getMaterial("sprite_mat");
    if (retrievedMat) {
        printf("   ✓ Retrieved material by name\n");
    }

    // ============================================
    // 6. 加载音频
    // ============================================
    printf("\n6. Loading Audio...\n");

    // 加载音效
    auto sound = resources.getAudio("assets/audio/jump.wav", AudioType::Sound);
    if (sound) {
        printf("   ✓ Loaded sound effect\n");
        // sound->play();  // 播放一次
    } else {
        printf("   ✗ Failed to load sound (file not found)\n");
    }

    // 加载音乐
    auto music = resources.getAudio("assets/audio/bgm.mp3", AudioType::Music);
    if (music) {
        printf("   ✓ Loaded music\n");
        // music->play(-1);  // 循环播放
    } else {
        printf("   ✗ Failed to load music (file not found)\n");
    }

    // ============================================
    // 7. 资源统计
    // ============================================
    printf("\n7. Resource Statistics...\n");

    auto stats = resources.getStats();
    printf("   Textures:  %zu\n", stats.textureCount);
    printf("   Shaders:   %zu\n", stats.shaderCount);
    printf("   Materials: %zu\n", stats.materialCount);
    printf("   Fonts:     %zu\n", stats.fontCount);
    printf("   Texts:     %zu\n", stats.textCount);
    printf("   Audio:     %zu\n", stats.audioCount);

    // ============================================
    // 8. 默认资源
    // ============================================
    printf("\n8. Default Resources...\n");

    auto defTex = resources.getDefaultTexture();
    auto defShader = resources.getDefaultShader();
    auto defMaterial = resources.getDefaultMaterial();

    printf("   ✓ Default Texture:  %s\n", defTex ? "available" : "null");
    printf("   ✓ Default Shader:   %s\n", defShader ? "available" : "null");
    printf("   ✓ Default Material: %s\n", defMaterial ? "available" : "null");

    printf("\n=== Resource Loading Complete ===\n");

    // 运行应用（主循环）
    printf("\nRunning main loop...\n");
    app->run();

    return 0;
}