132 lines
3.4 KiB
C++
132 lines
3.4 KiB
C++
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#include<hgl/graph/vulkan/VK.h>
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#include<hgl/graph/vulkan/VKDevice.h>
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#include<hgl/filesystem/FileSystem.h>
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VK_NAMESPACE_BEGIN
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namespace
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{
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#pragma pack(push,1)
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struct TGAHeader
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{
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uint8 id;
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uint8 color_map_type;
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uint8 image_type; // 1 colormap image ,2 true-color,3 grayscale
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uint16 color_map_first;
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uint16 color_map_length;
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uint8 color_map_size;
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uint16 x_origin;
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uint16 y_origin;
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uint16 width;
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uint16 height;
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uint8 bit;
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uint8 image_desc;
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};
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union TGAImageDesc
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{
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//不要把此union放到上面的struct中，否则Visual C++会将此union编译成4字节。GCC无此问题
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uint8 image_desc;
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struct
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{
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uint alpha_depth:4;
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uint reserved:1;
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uint direction:1; //0 lower-left,1 upper left
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};
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};
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#pragma pack(pop)
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void RGB8to565(uint8 *data,uint size)
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{
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uint8 *src=data;
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uint16 *target=(uint16 *)data;
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for(uint i=0;i<size;i++)
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{
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*target=(((src[0])<<8)&0xF800)
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|(((src[1])<<3)&0x7E0)
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| ((src[2])>>3);
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++target;
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src+=3;
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}
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}
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}//namespace
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Texture2D *LoadTGATexture(const OSString &filename,Device *device)
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{
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uint8 *data;
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const int64 file_length=filesystem::LoadFileToMemory(filename,(void **)&data);
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if(file_length<=0)
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{
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std::cerr<<"[ERROR] open file<"<<filename.c_str()<<"> failed."<<std::endl;
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return(nullptr);
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}
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TGAHeader *header=(TGAHeader *)data;
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VkFormat format;
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uint pixels_size=0;
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if(header->image_type==2)
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{
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if(header->bit==24)
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{
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RGB8to565(data+sizeof(TGAHeader),header->width*header->height);
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format=FMT_RGB565;
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pixels_size=header->width*header->height*2;
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}
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else if(header->bit==32)
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{
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format=FMT_RGBA8UN;
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pixels_size=header->width*header->height*4;
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}
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}
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else if(header->image_type==3&&header->bit==8)
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{
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format=FMT_R8UN;
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pixels_size=header->width*header->height;
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}
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else
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{
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std::cerr<<"[ERROR] Image format error,filename: "<<filename.c_str()<<std::endl;
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delete[] data;
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return(nullptr);
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}
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Texture2D *tex=device->CreateTexture2D(format,data+sizeof(TGAHeader),header->width,header->height,pixels_size);
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if(tex)
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{
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std::cout<<"load image file<"<<filename.c_str()<<">:<"<<header->width<<"x"<<header->height<<"> to texture ok"<<std::endl;
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}
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else
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{
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std::cout<<"load image file<"<<filename.c_str()<<">:<"<<header->width<<"x"<<header->height<<"> to texture failed."<<std::endl;
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}
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delete[] data;
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return(tex);
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}
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//GLuint CreateSamplerObject(GLint min_filter,GLint mag_filter,GLint clamp,const GLfloat *border_color)
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//{
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// GLuint sampler_object;
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// glGenSamplers(1,&sampler_object);
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// glSamplerParameteri(sampler_object,GL_TEXTURE_MIN_FILTER,min_filter);
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// glSamplerParameteri(sampler_object,GL_TEXTURE_MAG_FILTER,mag_filter);
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// glSamplerParameteri(sampler_object,GL_TEXTURE_WRAP_S,clamp);
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// glSamplerParameteri(sampler_object,GL_TEXTURE_WRAP_T,clamp);
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// glSamplerParameterfv(sampler_object,GL_TEXTURE_BORDER_COLOR,border_color);
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// return(sampler_object);
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//}
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VK_NAMESPACE_END
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