xenia-canary/third_party/crunch/crnlib/crn_pixel_format.cpp

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2014-01-21 07:02:34 +00:00
// File: crn_pixel_format.cpp
// See Copyright Notice and license at the end of inc/crnlib.h
#include "crn_core.h"
#include "crn_pixel_format.h"
#include "crn_image.h"
namespace crnlib
{
namespace pixel_format_helpers
{
const pixel_format g_all_pixel_formats[] =
{
PIXEL_FMT_DXT1,
PIXEL_FMT_DXT2,
PIXEL_FMT_DXT3,
PIXEL_FMT_DXT4,
PIXEL_FMT_DXT5,
PIXEL_FMT_3DC,
PIXEL_FMT_DXN,
PIXEL_FMT_DXT5A,
PIXEL_FMT_DXT5_CCxY,
PIXEL_FMT_DXT5_xGxR,
PIXEL_FMT_DXT5_xGBR,
PIXEL_FMT_DXT5_AGBR,
PIXEL_FMT_DXT1A,
PIXEL_FMT_ETC1,
PIXEL_FMT_R8G8B8,
PIXEL_FMT_L8,
PIXEL_FMT_A8,
PIXEL_FMT_A8L8,
PIXEL_FMT_A8R8G8B8
};
uint get_num_formats()
{
return sizeof(g_all_pixel_formats) / sizeof(g_all_pixel_formats[0]);
}
pixel_format get_pixel_format_by_index(uint index)
{
CRNLIB_ASSERT(index < get_num_formats());
return g_all_pixel_formats[index];
}
const char* get_pixel_format_string(pixel_format fmt)
{
switch (fmt)
{
case PIXEL_FMT_INVALID: return "INVALID";
case PIXEL_FMT_DXT1: return "DXT1";
case PIXEL_FMT_DXT1A: return "DXT1A";
case PIXEL_FMT_DXT2: return "DXT2";
case PIXEL_FMT_DXT3: return "DXT3";
case PIXEL_FMT_DXT4: return "DXT4";
case PIXEL_FMT_DXT5: return "DXT5";
case PIXEL_FMT_3DC: return "3DC";
case PIXEL_FMT_DXN: return "DXN";
case PIXEL_FMT_DXT5A: return "DXT5A";
case PIXEL_FMT_DXT5_CCxY: return "DXT5_CCxY";
case PIXEL_FMT_DXT5_xGxR: return "DXT5_xGxR";
case PIXEL_FMT_DXT5_xGBR: return "DXT5_xGBR";
case PIXEL_FMT_DXT5_AGBR: return "DXT5_AGBR";
case PIXEL_FMT_ETC1: return "ETC1";
case PIXEL_FMT_R8G8B8: return "R8G8B8";
case PIXEL_FMT_A8R8G8B8: return "A8R8G8B8";
case PIXEL_FMT_A8: return "A8";
case PIXEL_FMT_L8: return "L8";
case PIXEL_FMT_A8L8: return "A8L8";
default: break;
}
CRNLIB_ASSERT(false);
return "?";
}
const char* get_crn_format_string(crn_format fmt)
{
switch (fmt)
{
case cCRNFmtDXT1: return "DXT1";
case cCRNFmtDXT3: return "DXT3";
case cCRNFmtDXT5: return "DXT5";
case cCRNFmtDXT5_CCxY: return "DXT5_CCxY";
case cCRNFmtDXT5_xGBR: return "DXT5_xGBR";
case cCRNFmtDXT5_AGBR: return "DXT5_AGBR";
case cCRNFmtDXT5_xGxR: return "DXT5_xGxR";
case cCRNFmtDXN_XY: return "DXN_XY";
case cCRNFmtDXN_YX: return "DXN_YX";
case cCRNFmtDXT5A: return "DXT5A";
case cCRNFmtETC1: return "ETC1";
default: break;
}
CRNLIB_ASSERT(false);
return "?";
}
component_flags get_component_flags(pixel_format fmt)
{
// These flags are for *uncooked* pixels, i.e. after after adding Z to DXN maps, or converting YCC maps to RGB, etc.
uint flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid | cCompFlagGrayscale;
switch (fmt)
{
case PIXEL_FMT_DXT1:
case PIXEL_FMT_ETC1:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid;
break;
}
case PIXEL_FMT_DXT1A:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid;
break;
}
case PIXEL_FMT_DXT2:
case PIXEL_FMT_DXT3:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid;
break;
}
case PIXEL_FMT_DXT4:
case PIXEL_FMT_DXT5:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid;
break;
}
case PIXEL_FMT_DXT5A:
{
flags = cCompFlagAValid;
break;
}
case PIXEL_FMT_DXT5_CCxY:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagLumaChroma;
break;
}
case PIXEL_FMT_DXT5_xGBR:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagNormalMap;
break;
}
case PIXEL_FMT_DXT5_AGBR:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid | cCompFlagNormalMap;
break;
}
case PIXEL_FMT_DXT5_xGxR:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagNormalMap;
break;
}
case PIXEL_FMT_3DC:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagNormalMap;
break;
}
case PIXEL_FMT_DXN:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagNormalMap;
break;
}
case PIXEL_FMT_R8G8B8:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid;
break;
}
case PIXEL_FMT_A8R8G8B8:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid;
break;
}
case PIXEL_FMT_A8:
{
flags = cCompFlagAValid;
break;
}
case PIXEL_FMT_L8:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagGrayscale;
break;
}
case PIXEL_FMT_A8L8:
{
flags = cCompFlagRValid | cCompFlagGValid | cCompFlagBValid | cCompFlagAValid | cCompFlagGrayscale;
break;
}
default:
{
CRNLIB_ASSERT(0);
break;
}
}
return static_cast<component_flags>(flags);
}
crn_format convert_pixel_format_to_best_crn_format(pixel_format crn_fmt)
{
crn_format fmt = cCRNFmtDXT1;
switch (crn_fmt)
{
case PIXEL_FMT_DXT1:
case PIXEL_FMT_DXT1A:
fmt = cCRNFmtDXT1;
break;
case PIXEL_FMT_DXT2:
case PIXEL_FMT_DXT3:
case PIXEL_FMT_DXT4:
case PIXEL_FMT_DXT5:
fmt = cCRNFmtDXT5;
break;
case PIXEL_FMT_3DC:
fmt = cCRNFmtDXN_YX;
break;
case PIXEL_FMT_DXN:
fmt = cCRNFmtDXN_XY;
break;
case PIXEL_FMT_DXT5A:
fmt = cCRNFmtDXT5A;
break;
case PIXEL_FMT_R8G8B8:
case PIXEL_FMT_L8:
fmt = cCRNFmtDXT1;
break;
case PIXEL_FMT_A8R8G8B8:
case PIXEL_FMT_A8:
case PIXEL_FMT_A8L8:
fmt = cCRNFmtDXT5;
break;
case PIXEL_FMT_DXT5_CCxY:
fmt = cCRNFmtDXT5_CCxY;
break;
case PIXEL_FMT_DXT5_xGBR:
fmt = cCRNFmtDXT5_xGBR;
break;
case PIXEL_FMT_DXT5_AGBR:
fmt = cCRNFmtDXT5_AGBR;
break;
case PIXEL_FMT_DXT5_xGxR:
fmt = cCRNFmtDXT5_xGxR;
break;
case PIXEL_FMT_ETC1:
fmt = cCRNFmtETC1;
break;
default:
{
CRNLIB_ASSERT(false);
break;
}
}
return fmt;
}
pixel_format convert_crn_format_to_pixel_format(crn_format fmt)
{
switch (fmt)
{
case cCRNFmtDXT1: return PIXEL_FMT_DXT1;
case cCRNFmtDXT3: return PIXEL_FMT_DXT3;
case cCRNFmtDXT5: return PIXEL_FMT_DXT5;
case cCRNFmtDXT5_CCxY: return PIXEL_FMT_DXT5_CCxY;
case cCRNFmtDXT5_xGxR: return PIXEL_FMT_DXT5_xGxR;
case cCRNFmtDXT5_xGBR: return PIXEL_FMT_DXT5_xGBR;
case cCRNFmtDXT5_AGBR: return PIXEL_FMT_DXT5_AGBR;
case cCRNFmtDXN_XY: return PIXEL_FMT_DXN;
case cCRNFmtDXN_YX: return PIXEL_FMT_3DC;
case cCRNFmtDXT5A: return PIXEL_FMT_DXT5A;
case cCRNFmtETC1: return PIXEL_FMT_ETC1;
default:
{
CRNLIB_ASSERT(false);
break;
}
}
return PIXEL_FMT_INVALID;
}
} // namespace pixel_format
} // namespace crnlib