285 lines
8.3 KiB
C
285 lines
8.3 KiB
C
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// File: crn_pixel_format.h
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// See Copyright Notice and license at the end of inc/crnlib.h
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#pragma once
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#include "crn_dxt.h"
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#include "../inc/crnlib.h"
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#include "../inc/dds_defs.h"
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namespace crnlib
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{
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namespace pixel_format_helpers
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{
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uint get_num_formats();
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pixel_format get_pixel_format_by_index(uint index);
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const char* get_pixel_format_string(pixel_format fmt);
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const char* get_crn_format_string(crn_format fmt);
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inline bool is_grayscale(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_L8:
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case PIXEL_FMT_A8L8:
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return true;
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default: break;
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}
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return false;
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}
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inline bool is_dxt1(pixel_format fmt)
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{
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return (fmt == PIXEL_FMT_DXT1) || (fmt == PIXEL_FMT_DXT1A);
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}
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// has_alpha() should probably be called "has_opacity()" - it indicates if the format encodes opacity
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// because some swizzled DXT5 formats do not encode opacity.
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inline bool has_alpha(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_DXT1A:
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case PIXEL_FMT_DXT2:
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case PIXEL_FMT_DXT3:
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case PIXEL_FMT_DXT4:
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case PIXEL_FMT_DXT5:
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case PIXEL_FMT_DXT5A:
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case PIXEL_FMT_A8R8G8B8:
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case PIXEL_FMT_A8:
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case PIXEL_FMT_A8L8:
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case PIXEL_FMT_DXT5_AGBR:
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return true;
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default: break;
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}
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return false;
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}
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inline bool is_alpha_only(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_A8:
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case PIXEL_FMT_DXT5A:
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return true;
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default: break;
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}
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return false;
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}
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inline bool is_normal_map(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_3DC:
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case PIXEL_FMT_DXN:
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case PIXEL_FMT_DXT5_xGBR:
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case PIXEL_FMT_DXT5_xGxR:
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case PIXEL_FMT_DXT5_AGBR:
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return true;
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default: break;
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}
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return false;
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}
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inline int is_dxt(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_DXT1:
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case PIXEL_FMT_DXT1A:
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case PIXEL_FMT_DXT2:
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case PIXEL_FMT_DXT3:
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case PIXEL_FMT_DXT4:
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case PIXEL_FMT_DXT5:
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case PIXEL_FMT_3DC:
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case PIXEL_FMT_DXT5A:
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case PIXEL_FMT_DXN:
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case PIXEL_FMT_DXT5_CCxY:
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case PIXEL_FMT_DXT5_xGxR:
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case PIXEL_FMT_DXT5_xGBR:
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case PIXEL_FMT_DXT5_AGBR:
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case PIXEL_FMT_ETC1:
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return true;
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default: break;
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}
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return false;
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}
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inline int get_fundamental_format(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_DXT1A:
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return PIXEL_FMT_DXT1;
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case PIXEL_FMT_DXT5_CCxY:
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case PIXEL_FMT_DXT5_xGxR:
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case PIXEL_FMT_DXT5_xGBR:
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case PIXEL_FMT_DXT5_AGBR:
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return PIXEL_FMT_DXT5;
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default: break;
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}
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return fmt;
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}
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inline dxt_format get_dxt_format(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_DXT1: return cDXT1;
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case PIXEL_FMT_DXT1A: return cDXT1A;
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case PIXEL_FMT_DXT2: return cDXT3;
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case PIXEL_FMT_DXT3: return cDXT3;
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case PIXEL_FMT_DXT4: return cDXT5;
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case PIXEL_FMT_DXT5: return cDXT5;
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case PIXEL_FMT_3DC: return cDXN_YX;
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case PIXEL_FMT_DXT5A: return cDXT5A;
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case PIXEL_FMT_DXN: return cDXN_XY;
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case PIXEL_FMT_DXT5_CCxY: return cDXT5;
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case PIXEL_FMT_DXT5_xGxR: return cDXT5;
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case PIXEL_FMT_DXT5_xGBR: return cDXT5;
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case PIXEL_FMT_DXT5_AGBR: return cDXT5;
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case PIXEL_FMT_ETC1: return cETC1;
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default: break;
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}
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return cDXTInvalid;
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}
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inline pixel_format from_dxt_format(dxt_format dxt_fmt)
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{
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switch (dxt_fmt)
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{
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case cDXT1:
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return PIXEL_FMT_DXT1;
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case cDXT1A:
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return PIXEL_FMT_DXT1A;
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case cDXT3:
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return PIXEL_FMT_DXT3;
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case cDXT5:
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return PIXEL_FMT_DXT5;
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case cDXN_XY:
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return PIXEL_FMT_DXN;
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case cDXN_YX:
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return PIXEL_FMT_3DC;
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case cDXT5A:
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return PIXEL_FMT_DXT5A;
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case cETC1:
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return PIXEL_FMT_ETC1;
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default: break;
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}
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CRNLIB_ASSERT(false);
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return PIXEL_FMT_INVALID;
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}
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inline bool is_pixel_format_non_srgb(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_3DC:
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case PIXEL_FMT_DXN:
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case PIXEL_FMT_DXT5A:
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case PIXEL_FMT_DXT5_CCxY:
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case PIXEL_FMT_DXT5_xGxR:
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case PIXEL_FMT_DXT5_xGBR:
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case PIXEL_FMT_DXT5_AGBR:
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return true;
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default: break;
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}
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return false;
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}
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inline bool is_crn_format_non_srgb(crn_format fmt)
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{
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switch (fmt)
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{
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case cCRNFmtDXN_XY:
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case cCRNFmtDXN_YX:
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case cCRNFmtDXT5A:
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case cCRNFmtDXT5_CCxY:
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case cCRNFmtDXT5_xGxR:
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case cCRNFmtDXT5_xGBR:
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case cCRNFmtDXT5_AGBR:
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return true;
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default: break;
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}
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return false;
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}
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inline uint get_bpp(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_DXT1: return 4;
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case PIXEL_FMT_DXT1A: return 4;
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case PIXEL_FMT_ETC1: return 4;
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case PIXEL_FMT_DXT2: return 8;
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case PIXEL_FMT_DXT3: return 8;
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case PIXEL_FMT_DXT4: return 8;
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case PIXEL_FMT_DXT5: return 8;
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case PIXEL_FMT_3DC: return 8;
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case PIXEL_FMT_DXT5A: return 4;
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case PIXEL_FMT_R8G8B8: return 24;
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case PIXEL_FMT_A8R8G8B8: return 32;
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case PIXEL_FMT_A8: return 8;
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case PIXEL_FMT_L8: return 8;
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case PIXEL_FMT_A8L8: return 16;
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case PIXEL_FMT_DXN: return 8;
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case PIXEL_FMT_DXT5_CCxY: return 8;
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case PIXEL_FMT_DXT5_xGxR: return 8;
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case PIXEL_FMT_DXT5_xGBR: return 8;
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case PIXEL_FMT_DXT5_AGBR: return 8;
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default: break;
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}
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CRNLIB_ASSERT(false);
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return 0;
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};
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inline uint get_dxt_bytes_per_block(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_DXT1: return 8;
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case PIXEL_FMT_DXT1A: return 8;
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case PIXEL_FMT_DXT5A: return 8;
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case PIXEL_FMT_ETC1: return 8;
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case PIXEL_FMT_DXT2: return 16;
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case PIXEL_FMT_DXT3: return 16;
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case PIXEL_FMT_DXT4: return 16;
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case PIXEL_FMT_DXT5: return 16;
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case PIXEL_FMT_3DC: return 16;
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case PIXEL_FMT_DXN: return 16;
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case PIXEL_FMT_DXT5_CCxY: return 16;
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case PIXEL_FMT_DXT5_xGxR: return 16;
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case PIXEL_FMT_DXT5_xGBR: return 16;
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case PIXEL_FMT_DXT5_AGBR: return 16;
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default: break;
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}
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CRNLIB_ASSERT(false);
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return 0;
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}
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enum component_flags
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{
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cCompFlagRValid = 1,
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cCompFlagGValid = 2,
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cCompFlagBValid = 4,
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cCompFlagAValid = 8,
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cCompFlagGrayscale = 16,
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cCompFlagNormalMap = 32,
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cCompFlagLumaChroma = 64,
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cDefaultCompFlags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid
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};
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component_flags get_component_flags(pixel_format fmt);
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crn_format convert_pixel_format_to_best_crn_format(pixel_format crn_fmt);
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pixel_format convert_crn_format_to_pixel_format(crn_format fmt);
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} // namespace pixel_format_helpers
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} // namespace crnlib
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