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Merge pull request #86313 from BlueCube3310/etc2-r-rg

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Implement `ETC2_R` and `ETC2_RG` compression to `etcpak`
This commit is contained in:
Rémi Verschelde
2024-01-29 13:16:34 +01:00
parent 6d1e51c23e 50d33aac6c
commit 44b92ec85f
7 changed files with 548 additions and 42 deletions
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69
modules/etcpak/image_compress_etcpak.cpp
View File

@@ -44,9 +44,9 @@ EtcpakType _determine_etc_type(Image::UsedChannels p_channels) {
case Image::USED_CHANNELS_LA:
return EtcpakType::ETCPAK_TYPE_ETC2_ALPHA;
case Image::USED_CHANNELS_R:
return EtcpakType::ETCPAK_TYPE_ETC2;
return EtcpakType::ETCPAK_TYPE_ETC2_R;
case Image::USED_CHANNELS_RG:
return EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG;
return EtcpakType::ETCPAK_TYPE_ETC2_RG;
case Image::USED_CHANNELS_RGB:
return EtcpakType::ETCPAK_TYPE_ETC2;
case Image::USED_CHANNELS_RGBA:
@@ -114,6 +114,12 @@ void _compress_etcpak(EtcpakType p_compresstype, Image *r_img) {
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2) {
target_format = Image::FORMAT_ETC2_RGB8;
r_img->convert_rgba8_to_bgra8(); // It's badly documented but ETCPAK seems to be expected BGRA8 for ETC.
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_R) {
target_format = Image::FORMAT_ETC2_R11;
r_img->convert_rgba8_to_bgra8(); // It's badly documented but ETCPAK seems to be expected BGRA8 for ETC.
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_RG) {
target_format = Image::FORMAT_ETC2_RG11;
r_img->convert_rgba8_to_bgra8(); // It's badly documented but ETCPAK seems to be expected BGRA8 for ETC.
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG) {
target_format = Image::FORMAT_ETC2_RA_AS_RG;
r_img->convert_rg_to_ra_rgba8();
@@ -224,22 +230,49 @@ void _compress_etcpak(EtcpakType p_compresstype, Image *r_img) {
// Override the src_mip_read pointer to our temporary Vector.
src_mip_read = padded_src.ptr();
}
if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC1) {
CompressEtc1RgbDither(src_mip_read, dest_mip_write, blocks, mip_w);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2) {
CompressEtc2Rgb(src_mip_read, dest_mip_write, blocks, mip_w, true);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_ALPHA || p_compresstype == EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG) {
CompressEtc2Rgba(src_mip_read, dest_mip_write, blocks, mip_w, true);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT1) {
CompressDxt1Dither(src_mip_read, dest_mip_write, blocks, mip_w);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5 || p_compresstype == EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG) {
CompressDxt5(src_mip_read, dest_mip_write, blocks, mip_w);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_RGTC_RG) {
CompressRgtcRG(src_mip_read, dest_mip_write, blocks, mip_w);
} else if (p_compresstype == EtcpakType::ETCPAK_TYPE_RGTC_R) {
CompressRgtcR(src_mip_read, dest_mip_write, blocks, mip_w);
} else {
ERR_FAIL_MSG("etcpak: Invalid or unsupported compression format.");
switch (p_compresstype) {
case EtcpakType::ETCPAK_TYPE_ETC1:
CompressEtc1RgbDither(src_mip_read, dest_mip_write, blocks, mip_w);
break;
case EtcpakType::ETCPAK_TYPE_ETC2:
CompressEtc2Rgb(src_mip_read, dest_mip_write, blocks, mip_w, true);
break;
case EtcpakType::ETCPAK_TYPE_ETC2_ALPHA:
case EtcpakType::ETCPAK_TYPE_ETC2_RA_AS_RG:
CompressEtc2Rgba(src_mip_read, dest_mip_write, blocks, mip_w, true);
break;
case EtcpakType::ETCPAK_TYPE_ETC2_R:
CompressEtc2R8(src_mip_read, dest_mip_write, blocks, mip_w);
break;
case EtcpakType::ETCPAK_TYPE_ETC2_RG:
CompressEtc2RG8(src_mip_read, dest_mip_write, blocks, mip_w);
break;
case EtcpakType::ETCPAK_TYPE_DXT1:
CompressDxt1Dither(src_mip_read, dest_mip_write, blocks, mip_w);
break;
case EtcpakType::ETCPAK_TYPE_DXT5:
case EtcpakType::ETCPAK_TYPE_DXT5_RA_AS_RG:
CompressDxt5(src_mip_read, dest_mip_write, blocks, mip_w);
break;
case EtcpakType::ETCPAK_TYPE_RGTC_R:
CompressRgtcR(src_mip_read, dest_mip_write, blocks, mip_w);
break;
case EtcpakType::ETCPAK_TYPE_RGTC_RG:
CompressRgtcRG(src_mip_read, dest_mip_write, blocks, mip_w);
break;
default:
ERR_FAIL_MSG("etcpak: Invalid or unsupported compression format.");
break;
}
}

2
modules/etcpak/image_compress_etcpak.h
View File

@@ -38,6 +38,8 @@ enum class EtcpakType {
ETCPAK_TYPE_ETC2,
ETCPAK_TYPE_ETC2_ALPHA,
ETCPAK_TYPE_ETC2_RA_AS_RG,
ETCPAK_TYPE_ETC2_R,
ETCPAK_TYPE_ETC2_RG,
ETCPAK_TYPE_DXT1,
ETCPAK_TYPE_DXT5,
ETCPAK_TYPE_DXT5_RA_AS_RG,