52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
#pragma once
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#include<hgl/platform/Platform.h>
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namespace hgl
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{
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namespace imgfmt
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{
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constexpr const uint TGA_IMAGE_TYPE_COLOR_MAP =1;
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constexpr const uint TGA_IMAGE_TYPE_TRUE_COLOR =2;
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constexpr const uint TGA_IMAGE_TYPE_GRAYSCALE =3;
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constexpr const uint TGA_DIRECTION_LOWER_LEFT =0;
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constexpr const uint TGA_DIRECTION_UPPER_LEFT =1;
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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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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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constexpr size_t TGAHeaderSize=sizeof(TGAHeader); ///<TGA文件头，必须等于18
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bool FillTGAHeader(TGAHeader *header,const uint16 width,const uint16 height,const uint8 channels,const uint8 single_channel_bits=8);
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}//namespace imgfmt
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}//namespace hgl
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