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newly Loader code of Texture

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This commit is contained in:
hyzboy
2021-12-13 21:03:41 +08:00
parent 926802619f
commit 9d0ae0a071
10 changed files with 391 additions and 304 deletions
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32
inc/hgl/graph/Bitmap2DLoader.h Normal file
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@@ -0,0 +1,32 @@
#ifndef HGL_GRAPH_BITMAP2D_LOADER_INCLUDE
#define HGL_GRAPH_BITMAP2D_LOADER_INCLUDE
#include<hgl/graph/TextureLoader.h>
namespace hgl
{
namespace graph
{
/**
* 2Dλͼ<CEBB><CDBC><EFBFBD><EFBFBD>
*/
class Bitmap2DLoader:public Texture2DLoader
{
protected:
BitmapData *bmp=nullptr;
public:
using Texture2DLoader::Texture2DLoader;
~Bitmap2DLoader();
void *OnBegin(uint32 total_bytes) override;
void OnEnd() override {}
BitmapData *GetBitmap();
};//class Bitmap2DLoader
BitmapData *LoadBitmapFromFile(const OSString &filename);
}//namespace graph
}//namespace hgl
#endif//HGL_GRAPH_BITMAP2D_LOADER_INCLUDE

152
inc/hgl/graph/TextureLoader.h
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@@ -27,90 +27,124 @@ namespace hgl
constexpr uint32 CompressFormatCount=sizeof(CompressFormatList)/sizeof(VkFormat);
#pragma pack(push,1)
struct Tex2DFileHeader
{
uint8 id[6]; ///<Tex2D\x1A
uint8 version; ///<必须为3
uint8 mipmaps;
uint32 width;
uint32 height;
uint8 channels;
public:
const uint pixel_count()const{return width*height;}
};//struct Tex2DFileHeader
struct TexPixelFormat
{
char colors[4];
uint8 bits[4];
uint8 datatype;
public:
const uint pixel_bits()const{return bits[0]+bits[1]+bits[2]+bits[3];}
const uint pixel_bytes()const{return pixel_bits()>>3;}
};//struct TexPixelFormat
#pragma pack(pop)
/**
* 2D纹理加载器
*/
class Texture2DLoader
{
protected:
Tex2DFileHeader file_header;
uint8 channels; //0: compress 1/2/3/4:normal
union
{
TexPixelFormat pixel_format;
uint16 compress_format;
struct
{
char colors[4];
uint8 bits[4];
uint8 datatype;
};
struct
{
uint16 compress_format;
};
};
public:
const uint pixel_bits()const
{
return channels ?bits[0]+bits[1]+bits[2]+bits[3]
:CompressFormatBits[compress_format];
}
};//struct TexPixelFormat
constexpr uint TexPixelFormatLength=sizeof(TexPixelFormat);
struct alignas(8) TextureFileHeader
{
uint8 id_str[8]; ///<Texture\x1A
uint8 version; ///<必须为0
uint8 type; ///<贴图类型，等同于VkImageViewType
union
{
uint32 length; ///<长(1D纹理用)
uint32 width; ///<宽(2D/Cube纹理用)
};
uint32 height; ///<高(2D/3D/Cube纹理用)
union
{
uint32 depth; ///<深度(3D纹理用)
uint32 layers; ///<层数(Arrays纹理用)
};
TexPixelFormat pixel_format; ///<象素格式
uint8 mipmaps; ///<mipmaps
};
constexpr uint TextureFileHeaderLength=sizeof(TextureFileHeader); //GPUBuffer内需要64位8字节对齐，如果此值不对齐，请想办法填0
#pragma pack(pop)
const uint32 ComputeMipmapBytes(uint32 length,uint32 bytes);
const uint32 ComputeMipmapBytes(uint32 width,uint32 height,uint32 bytes);
const uint32 ComputeMipmapBytes(uint32 width,uint32 height,uint32 depth,uint32 bytes);
class TextureLoader
{
protected:
VkImageViewType type;
TextureFileHeader file_header;
VkFormat format;
uint32 mipmap_zero_total_bytes; ///< 0 级mipmaps单个图象的总字节数
uint32 total_bytes; ///<总字节数
protected:
uint32 mipmap_zero_total_bytes;
virtual uint32 GetPixelsCount()const=0;
virtual uint32 GetImageCount()const=0; ///<每个级别的图象数量
virtual uint32 GetTotalBytes()const=0; ///<计算总字节数
protected:
uint32 ComputeTotalBytes();
virtual void *OnBegin(uint32)=0;
virtual void OnEnd()=0;
virtual void OnError(){}
public:
const Tex2DFileHeader *GetFileHeader()const{return &file_header;}
TextureLoader(const VkImageViewType &ivt){type=ivt;}
public:
virtual bool Load(io::InputStream *);
bool Load(const OSString &filename);
};//class TextureLoader
virtual ~Texture2DLoader()=default;
bool Load(io::InputStream *is);
bool Load(const OSString &filename);
};//class Texture2DLoader
/**
* 2D位图加载
* 2D纹理加载器
*/
class Bitmap2DLoader:public Texture2DLoader
class Texture2DLoader:public TextureLoader
{
protected:
protected: // override functions
BitmapData *bmp=nullptr;
uint32 GetPixelsCount()const override{return file_header.width*file_header.height;}
uint32 GetImageCount()const override{return 1;}
uint32 GetTotalBytes()const override
{
if(file_header.mipmaps<=1)
return mipmap_zero_total_bytes;
else
return ComputeMipmapBytes( file_header.width,
file_header.height,
mipmap_zero_total_bytes);
}
public:
~Bitmap2DLoader();
void *OnBegin(uint32 total_bytes) override;
void OnEnd() override {}
BitmapData *GetBitmap();
};//class Bitmap2DLoader
BitmapData *LoadBitmapFromFile(const OSString &filename);
Texture2DLoader():TextureLoader(VK_IMAGE_VIEW_TYPE_2D){}
virtual ~Texture2DLoader()=default;
};//class Texture2DLoader
}//namespace graph
}//namespace hgl
#endif//HGL_GRAPH_TEXTURE_LOADER_INCLUDE