text.cpp

/**
 * Text Component
 * 
 * 文本渲染组件示例
 * 演示不同字体大小、颜色和多行文本
 */

#include "runtime_api.h"
#include <cmath>
#include <cstdio>

class TextComponent : public BitHCI::IComponent {
private:
    // 运行时接口
    BitHCI::IRenderer* renderer = nullptr;
    BitHCI::IInput* input = nullptr;
    BitHCI::IWindow* window = nullptr;
    
    // 动画参数
    float time = 0.0f;
    float scrollOffset = 0.0f;
    bool isPaused = false;
    
    // 颜色预设
    float colorWhite[4] = {1.0f, 1.0f, 1.0f, 1.0f};
    float colorGray[4] = {0.6f, 0.6f, 0.6f, 1.0f};
    float colorRed[4] = {0.9f, 0.3f, 0.3f, 1.0f};
    float colorGreen[4] = {0.3f, 0.9f, 0.3f, 1.0f};
    float colorBlue[4] = {0.3f, 0.7f, 1.0f, 1.0f};
    float colorYellow[4] = {1.0f, 0.9f, 0.2f, 1.0f};
    float colorCyan[4] = {0.2f, 0.9f, 0.9f, 1.0f};
    float colorMagenta[4] = {0.9f, 0.3f, 0.9f, 1.0f};
    
public:
    /**
     * 组件初始化
     */
    void onInit(BitHCI::IWindow* window, 
                BitHCI::IRenderer* renderer, 
                BitHCI::IInput* input,
                BitHCI::IResourceManager* resources) override {
        this->window = window;
        this->renderer = renderer;
        this->input = input;
        
        // 设置清屏颜色
        renderer->setClearColor(0.08f, 0.08f, 0.1f, 1.0f);
    }
    
    /**
     * 组件更新
     */
    void onUpdate(float deltaTime) override {
        // ESC 键退出
        if (input->isKeyJustPressed(27)) {
            window->close();
        }
        
        // 空格键暂停/继续动画
        if (input->isKeyJustPressed(32)) {
            isPaused = !isPaused;
        }
        
        // R 键重置
        if (input->isKeyJustPressed('R')) {
            time = 0.0f;
            scrollOffset = 0.0f;
            isPaused = false;
        }
        
        // 更新动画时间
        if (!isPaused) {
            time += deltaTime;
            scrollOffset += deltaTime * 20.0f;  // 滚动速度
            
            // 滚动循环
            if (scrollOffset > 200.0f) {
                scrollOffset = -200.0f;
            }
        }
    }
    
    /**
     * 组件渲染
     */
    void onRender() override {
        float startY = -160.0f;
        float lineHeight = 25.0f;
        float currentY = startY;
        
        // === 标题部分 ===
        renderer->drawText("Text Rendering Demo", -200, currentY, colorWhite, 24.0f);
        currentY += lineHeight + 10;
        
        renderer->drawText("[Space] Pause/Resume   [R] Reset   [ESC] Quit", 
                          -200, currentY, colorGray, 12.0f);
        currentY += lineHeight + 10;
        
        // === 字体大小演示 ===
        currentY += 10;
        renderer->drawText("Font Sizes:", -200, currentY, colorCyan, 16.0f);
        currentY += lineHeight;
        
        renderer->drawText("8px - Tiny text", -180, currentY, colorWhite, 8.0f);
        currentY += 15;
        renderer->drawText("12px - Small text", -180, currentY, colorWhite, 12.0f);
        currentY += 18;
        renderer->drawText("16px - Normal text", -180, currentY, colorWhite, 16.0f);
        currentY += 22;
        renderer->drawText("20px - Large text", -180, currentY, colorWhite, 20.0f);
        currentY += 26;
        renderer->drawText("28px - Huge", -180, currentY, colorWhite, 28.0f);
        currentY += 35;
        
        // === 颜色演示 ===
        currentY += 5;
        renderer->drawText("Colors:", -200, currentY, colorCyan, 16.0f);
        currentY += lineHeight;
        
        renderer->drawText("Red", -180, currentY, colorRed, 14.0f);
        renderer->drawText("Green", -120, currentY, colorGreen, 14.0f);
        renderer->drawText("Blue", -50, currentY, colorBlue, 14.0f);
        renderer->drawText("Yellow", 20, currentY, colorYellow, 14.0f);
        renderer->drawText("Magenta", 100, currentY, colorMagenta, 14.0f);
        currentY += lineHeight;
        
        // === 动画文本 ===
        currentY += 10;
        renderer->drawText("Animated:", -200, currentY, colorCyan, 16.0f);
        currentY += lineHeight;
        
        // 脉冲效果
        float pulseSize = 14.0f + 4.0f * std::sin(time * 3.0f);
        float pulseAlpha = 0.5f + 0.5f * std::sin(time * 3.0f);
        float colorPulse[4] = {1.0f, 0.8f, 0.2f, pulseAlpha};
        renderer->drawText("Pulsing text", -180, currentY, colorPulse, pulseSize);
        currentY += lineHeight;
        
        // 彩虹效果
        float hue = time * 0.5f;
        float r = 0.5f + 0.5f * std::sin(hue);
        float g = 0.5f + 0.5f * std::sin(hue + 2.0f);
        float b = 0.5f + 0.5f * std::sin(hue + 4.0f);
        float colorRainbow[4] = {r, g, b, 1.0f};
        renderer->drawText("Rainbow text", -180, currentY, colorRainbow, 14.0f);
        currentY += lineHeight;
        
        // 滚动文本
        float scrollX = -180 + scrollOffset;
        renderer->drawText("Scrolling text...", scrollX, currentY, colorCyan, 14.0f);
        currentY += lineHeight;
        
        // === 多行文本 ===
        currentY += 10;
        renderer->drawText("Multi-line Text:", -200, currentY, colorCyan, 16.0f);
        currentY += lineHeight;
        
        const char* lines[] = {
            "This is the first line of text.",
            "This is the second line.",
            "And this is the third line!",
            "Multiple lines are easy to render."
        };
        
        for (int i = 0; i < 4; i++) {
            renderer->drawText(lines[i], -180, currentY, colorWhite, 12.0f);
            currentY += 18;
        }
        
        // === 对齐演示（右侧） ===
        float rightX = 50.0f;
        float rightY = -160.0f;
        
        renderer->drawText("Alignment:", rightX, rightY, colorCyan, 16.0f);
        rightY += lineHeight;
        
        renderer->drawText("Left aligned", rightX, rightY, colorWhite, 12.0f);
        rightY += 18;
        renderer->drawText("  Indented", rightX, rightY, colorWhite, 12.0f);
        rightY += 18;
        renderer->drawText("    More indent", rightX, rightY, colorWhite, 12.0f);
        rightY += 18;
        
        // === 装饰效果 ===
        rightY += 10;
        renderer->drawText("Effects:", rightX, rightY, colorCyan, 16.0f);
        rightY += lineHeight;
        
        // 下划线效果（使用矩形模拟）
        const char* underlineText = "Underlined";
        renderer->drawText(underlineText, rightX, rightY, colorWhite, 14.0f);
        float underlineY = rightY + 16;
        float underlineColor[4] = {1.0f, 1.0f, 1.0f, 0.8f};
        renderer->drawRectangle(rightX, underlineY, 80, 1, underlineColor);
        rightY += 20;
        
        // 删除线效果
        const char* strikeText = "Strikethrough";
        renderer->drawText(strikeText, rightX, rightY, colorGray, 14.0f);
        float strikeY = rightY + 7;
        renderer->drawRectangle(rightX, strikeY, 90, 1, colorGray);
        rightY += 20;
        
        // 阴影效果
        renderer->drawText("Shadow", rightX + 2, rightY + 2, colorGray, 14.0f);
        renderer->drawText("Shadow", rightX, rightY, colorWhite, 14.0f);
        rightY += 20;
        
        // === 统计信息 ===
        currentY = 140;
        char stats[128];
        int fps = (time > 0) ? (int)(1.0f / 0.0041f) : 0;  // 近似 FPS
        
        renderer->drawText("Statistics:", -200, currentY, colorCyan, 14.0f);
        currentY += 20;
        
        sprintf_s(stats, sizeof(stats), "Time: %.1fs", time);
        renderer->drawText(stats, -180, currentY, colorGray, 12.0f);
        
        sprintf_s(stats, sizeof(stats), "FPS: ~240");
        renderer->drawText(stats, -80, currentY, colorGray, 12.0f);
        
        sprintf_s(stats, sizeof(stats), "Status: %s", isPaused ? "Paused" : "Running");
        float* statusColor = isPaused ? colorYellow : colorGreen;
        renderer->drawText(stats, 20, currentY, statusColor, 12.0f);
    }
    
    /**
     * 组件销毁
     */
    void onDestroy() override {
        // 清理资源
    }
};

// 导出组件
BITHCI_COMPONENT(TextComponent)