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// 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_ETC2,
PIXEL_FMT_ETC2A,
PIXEL_FMT_ETC1S,
PIXEL_FMT_ETC2AS,
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_ETC2:
return "ETC2";
case PIXEL_FMT_ETC2A:
return "ETC2A";
case PIXEL_FMT_ETC1S:
return "ETC1S";
case PIXEL_FMT_ETC2AS:
return "ETC2AS";
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";
case cCRNFmtETC2:
return "ETC2";
case cCRNFmtETC2A:
return "ETC2A";
case cCRNFmtETC1S:
return "ETC1S";
case cCRNFmtETC2AS:
return "ETC2AS";
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:
case PIXEL_FMT_ETC2:
case PIXEL_FMT_ETC1S: {
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:
case PIXEL_FMT_ETC2A:
case PIXEL_FMT_ETC2AS: {
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;
case PIXEL_FMT_ETC2:
fmt = cCRNFmtETC2;
break;
case PIXEL_FMT_ETC2A:
fmt = cCRNFmtETC2A;
break;
case PIXEL_FMT_ETC1S:
fmt = cCRNFmtETC1S;
break;
case PIXEL_FMT_ETC2AS:
fmt = cCRNFmtETC2AS;
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;
case cCRNFmtETC2:
return PIXEL_FMT_ETC2;
case cCRNFmtETC2A:
return PIXEL_FMT_ETC2A;
case cCRNFmtETC1S:
return PIXEL_FMT_ETC1S;
case cCRNFmtETC2AS:
return PIXEL_FMT_ETC2AS;
default: {
CRNLIB_ASSERT(false);
break;
}
}
return PIXEL_FMT_INVALID;
}
} // namespace pixel_format
} // namespace crnlib
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