TextureManager.h

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* ngscopeclient                                                                                                        *
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* Copyright (c) 2012-2025 Andrew D. Zonenberg                                                                          *
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#ifndef TextureManager_h
#define TextureManager_h
 
class TextureManager;
 
#include <png.h>
 
class Texture
{
public:
    Texture(
        const vk::raii::Device& device,
        const vk::ImageCreateInfo& imageInfo,
        const vk::raii::Buffer& srcBuf,
        int width,
        int height,
        TextureManager* mgr,
        const std::string& name = "",
        bool upsampleLinear = true      //false for nearest neighbor upsampling instead
        );
 
    Texture(
        const vk::raii::Device& device,
        const vk::ImageCreateInfo& imageInfo,
        TextureManager* mgr,
        const std::string& name = ""
        );
 
    ~Texture();
 
    ImTextureID GetTexture()
    { return m_texture; }
 
    vk::ImageView GetView()
    { return **m_view; }
 
    vk::Image GetImage()
    { return *m_image; }
 
    void SetName(const std::string& name);
 
protected:
    void LayoutTransition(
        vk::raii::CommandBuffer& cmdBuf,
        vk::AccessFlags src,
        vk::AccessFlags dst,
        vk::ImageLayout from,
        vk::ImageLayout to);
 
    vk::raii::Image m_image;
 
    std::unique_ptr<vk::raii::ImageView> m_view;
 
    ImTextureID m_texture;
 
    std::unique_ptr<vk::raii::DeviceMemory> m_deviceMemory;
};
 
class TextureManager
{
public:
    TextureManager(std::shared_ptr<QueueHandle> queue);
    virtual ~TextureManager();
 
    void LoadTexture(
        const std::string& name,
        const std::string& path);
 
    GLFWimage LoadPNGToGLFWImage(const std::string& path);
 
    ImTextureID GetTexture(const std::string& name)
    {
        auto it = m_textures.find(name);
        if(it == m_textures.end())
        {
            LogFatal(
                "Texture \"%s\" not found. This is probably the result of a developer mistyping a texture ID.\n",
                name.c_str());
        }
        else
            return it->second->GetTexture();
    }
 
    std::unique_ptr<vk::raii::Sampler>& GetSampler()
    { return m_sampler; }
 
    std::unique_ptr<vk::raii::Sampler>& GetNearestSampler()
    { return m_nearestSampler; }
 
    void clear()
    { m_textures.clear(); }
 
    vk::raii::CommandBuffer& GetCmdBuffer()
    { return *m_cmdBuf; }
 
    std::shared_ptr<QueueHandle> GetQueue()
    { return m_queue; }
 
    vk::ImageView GetView(const std::string& name)
    { return m_textures[name]->GetView(); }
 
protected:
 
    png_structp LoadPNG(
        const std::string& path,
        size_t& width,
        size_t& height,
        FILE*& fp,
        png_infop& info,
        png_infop& end);
 
    std::map<std::string, std::shared_ptr<Texture> > m_textures;
 
    std::unique_ptr<vk::raii::Sampler> m_sampler;
 
    std::unique_ptr<vk::raii::Sampler> m_nearestSampler;
 
    std::shared_ptr<QueueHandle> m_queue;
    std::unique_ptr<vk::raii::CommandPool> m_cmdPool;
    std::unique_ptr<vk::raii::CommandBuffer> m_cmdBuf;
};
 
#endif