281 lines
9.0 KiB
C++
281 lines
9.0 KiB
C++
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// File: crn_pixel_format.cpp
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// See Copyright Notice and license at the end of inc/crnlib.h
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#include "crn_core.h"
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#include "crn_pixel_format.h"
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#include "crn_image.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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const pixel_format g_all_pixel_formats[] =
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{
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PIXEL_FMT_DXT1,
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PIXEL_FMT_DXT2,
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PIXEL_FMT_DXT3,
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PIXEL_FMT_DXT4,
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PIXEL_FMT_DXT5,
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PIXEL_FMT_3DC,
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PIXEL_FMT_DXN,
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PIXEL_FMT_DXT5A,
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PIXEL_FMT_DXT5_CCxY,
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PIXEL_FMT_DXT5_xGxR,
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PIXEL_FMT_DXT5_xGBR,
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PIXEL_FMT_DXT5_AGBR,
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PIXEL_FMT_DXT1A,
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PIXEL_FMT_ETC1,
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PIXEL_FMT_R8G8B8,
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PIXEL_FMT_L8,
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PIXEL_FMT_A8,
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PIXEL_FMT_A8L8,
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PIXEL_FMT_A8R8G8B8
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};
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uint get_num_formats()
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{
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return sizeof(g_all_pixel_formats) / sizeof(g_all_pixel_formats[0]);
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}
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pixel_format get_pixel_format_by_index(uint index)
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{
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CRNLIB_ASSERT(index < get_num_formats());
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return g_all_pixel_formats[index];
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}
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const char* get_pixel_format_string(pixel_format fmt)
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{
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switch (fmt)
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{
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case PIXEL_FMT_INVALID: return "INVALID";
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case PIXEL_FMT_DXT1: return "DXT1";
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case PIXEL_FMT_DXT1A: return "DXT1A";
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case PIXEL_FMT_DXT2: return "DXT2";
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case PIXEL_FMT_DXT3: return "DXT3";
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case PIXEL_FMT_DXT4: return "DXT4";
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case PIXEL_FMT_DXT5: return "DXT5";
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case PIXEL_FMT_3DC: return "3DC";
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case PIXEL_FMT_DXN: return "DXN";
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case PIXEL_FMT_DXT5A: return "DXT5A";
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case PIXEL_FMT_DXT5_CCxY: return "DXT5_CCxY";
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case PIXEL_FMT_DXT5_xGxR: return "DXT5_xGxR";
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case PIXEL_FMT_DXT5_xGBR: return "DXT5_xGBR";
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case PIXEL_FMT_DXT5_AGBR: return "DXT5_AGBR";
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case PIXEL_FMT_ETC1: return "ETC1";
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case PIXEL_FMT_R8G8B8: return "R8G8B8";
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case PIXEL_FMT_A8R8G8B8: return "A8R8G8B8";
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case PIXEL_FMT_A8: return "A8";
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case PIXEL_FMT_L8: return "L8";
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case PIXEL_FMT_A8L8: return "A8L8";
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default: break;
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}
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CRNLIB_ASSERT(false);
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return "?";
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}
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const char* get_crn_format_string(crn_format fmt)
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{
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switch (fmt)
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{
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case cCRNFmtDXT1: return "DXT1";
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case cCRNFmtDXT3: return "DXT3";
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case cCRNFmtDXT5: return "DXT5";
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case cCRNFmtDXT5_CCxY: return "DXT5_CCxY";
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case cCRNFmtDXT5_xGBR: return "DXT5_xGBR";
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case cCRNFmtDXT5_AGBR: return "DXT5_AGBR";
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case cCRNFmtDXT5_xGxR: return "DXT5_xGxR";
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case cCRNFmtDXN_XY: return "DXN_XY";
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case cCRNFmtDXN_YX: return "DXN_YX";
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case cCRNFmtDXT5A: return "DXT5A";
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case cCRNFmtETC1: return "ETC1";
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default: break;
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}
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CRNLIB_ASSERT(false);
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return "?";
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}
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component_flags get_component_flags(pixel_format fmt)
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{
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// These flags are for *uncooked* pixels, i.e. after after adding Z to DXN maps, or converting YCC maps to RGB, etc.
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uint flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid | cCompFlagGrayscale;
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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_ETC1:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid;
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break;
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}
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case PIXEL_FMT_DXT1A:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid;
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break;
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}
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case PIXEL_FMT_DXT2:
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case PIXEL_FMT_DXT3:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid;
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break;
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}
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case PIXEL_FMT_DXT4:
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case PIXEL_FMT_DXT5:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid;
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break;
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}
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case PIXEL_FMT_DXT5A:
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{
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flags = cCompFlagAValid;
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break;
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}
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case PIXEL_FMT_DXT5_CCxY:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagLumaChroma;
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break;
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}
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case PIXEL_FMT_DXT5_xGBR:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagNormalMap;
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break;
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}
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case PIXEL_FMT_DXT5_AGBR:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid | cCompFlagNormalMap;
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break;
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}
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case PIXEL_FMT_DXT5_xGxR:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagNormalMap;
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break;
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}
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case PIXEL_FMT_3DC:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagNormalMap;
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break;
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}
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case PIXEL_FMT_DXN:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagNormalMap;
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break;
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}
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case PIXEL_FMT_R8G8B8:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid;
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break;
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}
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case PIXEL_FMT_A8R8G8B8:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid;
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break;
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}
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case PIXEL_FMT_A8:
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{
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flags = cCompFlagAValid;
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break;
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}
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case PIXEL_FMT_L8:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagGrayscale;
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break;
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}
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case PIXEL_FMT_A8L8:
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{
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flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid | cCompFlagGrayscale;
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break;
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}
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default:
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{
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CRNLIB_ASSERT(0);
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break;
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}
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}
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return static_cast<component_flags>(flags);
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}
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crn_format convert_pixel_format_to_best_crn_format(pixel_format crn_fmt)
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{
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crn_format fmt = cCRNFmtDXT1;
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switch (crn_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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fmt = cCRNFmtDXT1;
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break;
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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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fmt = cCRNFmtDXT5;
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break;
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case PIXEL_FMT_3DC:
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fmt = cCRNFmtDXN_YX;
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break;
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case PIXEL_FMT_DXN:
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fmt = cCRNFmtDXN_XY;
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break;
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case PIXEL_FMT_DXT5A:
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fmt = cCRNFmtDXT5A;
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break;
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case PIXEL_FMT_R8G8B8:
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case PIXEL_FMT_L8:
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fmt = cCRNFmtDXT1;
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break;
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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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fmt = cCRNFmtDXT5;
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break;
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case PIXEL_FMT_DXT5_CCxY:
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fmt = cCRNFmtDXT5_CCxY;
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break;
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case PIXEL_FMT_DXT5_xGBR:
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fmt = cCRNFmtDXT5_xGBR;
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break;
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case PIXEL_FMT_DXT5_AGBR:
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fmt = cCRNFmtDXT5_AGBR;
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break;
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case PIXEL_FMT_DXT5_xGxR:
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fmt = cCRNFmtDXT5_xGxR;
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break;
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case PIXEL_FMT_ETC1:
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fmt = cCRNFmtETC1;
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break;
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default:
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{
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CRNLIB_ASSERT(false);
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break;
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}
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}
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return fmt;
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}
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pixel_format convert_crn_format_to_pixel_format(crn_format fmt)
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{
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switch (fmt)
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{
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case cCRNFmtDXT1: return PIXEL_FMT_DXT1;
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case cCRNFmtDXT3: return PIXEL_FMT_DXT3;
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case cCRNFmtDXT5: return PIXEL_FMT_DXT5;
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case cCRNFmtDXT5_CCxY: return PIXEL_FMT_DXT5_CCxY;
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case cCRNFmtDXT5_xGxR: return PIXEL_FMT_DXT5_xGxR;
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case cCRNFmtDXT5_xGBR: return PIXEL_FMT_DXT5_xGBR;
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case cCRNFmtDXT5_AGBR: return PIXEL_FMT_DXT5_AGBR;
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case cCRNFmtDXN_XY: return PIXEL_FMT_DXN;
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case cCRNFmtDXN_YX: return PIXEL_FMT_3DC;
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case cCRNFmtDXT5A: return PIXEL_FMT_DXT5A;
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case cCRNFmtETC1: return PIXEL_FMT_ETC1;
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default:
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{
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CRNLIB_ASSERT(false);
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break;
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}
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}
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return PIXEL_FMT_INVALID;
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}
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} // namespace pixel_format
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} // namespace crnlib
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