106 lines
3.1 KiB
C++
106 lines
3.1 KiB
C++
#pragma once
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#include <extra2d/graphics/resources/framebuffer.h>
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#include <glad/glad.h>
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#include <array>
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#include <cstdint>
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namespace extra2d {
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// ============================================================================
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// OpenGL 帧缓冲实现
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// ============================================================================
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class GLFramebuffer : public Framebuffer {
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public:
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// 最大颜色附件数
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static constexpr int MAX_COLOR_ATTACHMENTS = 8;
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/**
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* @brief 构造函数
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*/
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GLFramebuffer();
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/**
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* @brief 析构函数
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*/
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~GLFramebuffer() override;
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/**
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* @brief 初始化帧缓冲
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* @param desc 帧缓冲描述
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* @return 成功返回 true
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*/
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bool init(const FramebufferDesc& desc);
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/**
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* @brief 关闭帧缓冲，释放资源
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*/
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void shutdown();
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// Framebuffer 接口实现
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void bind() override;
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void unbind() override;
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void attachColorTexture(Ptr<Texture> texture, int attachment = 0) override;
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void attachDepthTexture(Ptr<Texture> texture) override;
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void attachDepthStencilTexture(Ptr<Texture> texture) override;
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bool isComplete() override;
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Ptr<Texture> getColorTexture(int attachment = 0) const override;
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Ptr<Texture> getDepthTexture() const override;
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int getWidth() const override { return width_; }
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int getHeight() const override { return height_; }
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Size getSize() const override { return Size(static_cast<float>(width_), static_cast<float>(height_)); }
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bool isValid() const override { return fboID_ != 0; }
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uintptr_t getNativeHandle() const override { return static_cast<uintptr_t>(fboID_); }
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void clear(const Color& color, bool clearColor = true,
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bool clearDepth = true, bool clearStencil = false) override;
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void setViewport(int x, int y, int width, int height) override;
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bool readPixels(int x, int y, int width, int height,
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std::vector<uint8_t>& outData) override;
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/**
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* @brief 获取 OpenGL FBO ID
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* @return FBO ID
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*/
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GLuint getFboID() const { return fboID_; }
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/**
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* @brief 创建带内置纹理的帧缓冲（便捷方法）
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* @param width 宽度
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* @param height 高度
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* @param colorFormat 颜色格式
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* @param depthFormat 深度格式（可选）
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* @return 成功返回 true
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*/
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bool createWithTextures(int width, int height,
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PixelFormat colorFormat = PixelFormat::RGBA8,
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PixelFormat depthFormat = PixelFormat::Depth24);
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private:
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GLuint fboID_ = 0;
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int width_ = 0;
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int height_ = 0;
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int numColorAttachments_ = 1;
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bool hasDepth_ = false;
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bool hasStencil_ = false;
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// 附件纹理
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std::array<Ptr<Texture>, MAX_COLOR_ATTACHMENTS> colorTextures_;
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Ptr<Texture> depthTexture_;
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Ptr<Texture> depthStencilTexture_;
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// 是否为内置纹理（需要自动清理）
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bool hasInternalTextures_ = false;
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/**
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* @brief 检查并更新完整状态
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*/
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bool checkStatus();
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/**
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* @brief 获取 OpenGL 附件枚举
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*/
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static GLenum getColorAttachment(int index);
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};
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} // namespace extra2d
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