79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
#pragma once
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#include <graphics/alpha_mask.h>
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#include <graphics/texture.h>
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#include <glad/glad.h>
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#include <memory>
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#include <string>
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namespace extra2d {
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// ============================================================================
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// OpenGL 纹理实现
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// ============================================================================
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class GLTexture : public Texture {
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public:
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GLTexture(int width, int height, const uint8_t *pixels, int channels);
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GLTexture(const std::string &filepath);
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~GLTexture();
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// Texture 接口实现
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int width() const override { return width_; }
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int height() const override { return height_; }
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Size size() const override {
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return Size(static_cast<float>(width_), static_cast<float>(height_));
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}
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int getChannels() const override { return channels_; }
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PixelFormat getFormat() const override;
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void *getNativeHandle() const override {
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return reinterpret_cast<void *>(static_cast<uintptr_t>(textureID_));
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}
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bool isValid() const override { return textureID_ != 0; }
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void setFilter(bool linear) override;
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void setWrap(bool repeat) override;
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// 从参数创建纹理的工厂方法
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static Ptr<Texture> create(int width, int height, PixelFormat format);
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// 加载压缩纹理（KTX/DDS 格式）
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bool loadCompressed(const std::string &filepath);
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// OpenGL 特定
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GLuint getTextureID() const { return textureID_; }
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void bind(unsigned int slot = 0) const;
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void unbind() const;
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// 获取纹理数据大小（字节），用于 VRAM 跟踪
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size_t getDataSize() const { return dataSize_; }
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// Alpha 遮罩
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bool hasAlphaMask() const {
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return alphaMask_ != nullptr && alphaMask_->isValid();
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}
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const AlphaMask *getAlphaMask() const { return alphaMask_.get(); }
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void generateAlphaMask(); // 从当前纹理数据生成遮罩
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private:
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GLuint textureID_;
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int width_;
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int height_;
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int channels_;
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PixelFormat format_;
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size_t dataSize_;
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// 原始像素数据（用于生成遮罩）
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std::vector<uint8_t> pixelData_;
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std::unique_ptr<AlphaMask> alphaMask_;
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void createTexture(const uint8_t *pixels);
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// KTX 文件加载
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bool loadKTX(const std::string &filepath);
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// DDS 文件加载
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bool loadDDS(const std::string &filepath);
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};
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} // namespace extra2d
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