From e31d416f946a7e810caf171e2baaa372e5153fac Mon Sep 17 00:00:00 2001
From: Alberto Torres <kungfoobar@gmail.com>
Date: Tue, 3 Sep 2024 14:20:56 +0200
Subject: [PATCH] Rename ddx_ktx to dds_ktx and add `get_ASTC_internal_format`

---
 libs/{ddx_ktx => dds_ktx}/dds-ktx.h           |  0
 .../ddx_ktx.nim => dds_ktx/dds_ktx.nim}       | 37 +++++++++++++++++++
 libs/{ddx_ktx => dds_ktx}/impl.c              |  0
 3 files changed, 37 insertions(+)
 rename libs/{ddx_ktx => dds_ktx}/dds-ktx.h (100%)
 rename libs/{ddx_ktx/ddx_ktx.nim => dds_ktx/dds_ktx.nim} (84%)
 rename libs/{ddx_ktx => dds_ktx}/impl.c (100%)

diff --git a/libs/ddx_ktx/dds-ktx.h b/libs/dds_ktx/dds-ktx.h
similarity index 100%
rename from libs/ddx_ktx/dds-ktx.h
rename to libs/dds_ktx/dds-ktx.h
diff --git a/libs/ddx_ktx/ddx_ktx.nim b/libs/dds_ktx/dds_ktx.nim
similarity index 84%
rename from libs/ddx_ktx/ddx_ktx.nim
rename to libs/dds_ktx/dds_ktx.nim
index deee5df..fc09789 100644
--- a/libs/ddx_ktx/ddx_ktx.nim
+++ b/libs/dds_ktx/dds_ktx.nim
@@ -248,3 +248,40 @@ proc ParseDdsKtx*(p: pointer, len: int): seq[KtxPart] =
     else:
         let err_msg = $cast[cstring](err.msg.addr)
         raise ValueError.newException err_msg
+
+func get_ASTC_internal_format*(blk_size: (int,int), is_sRGB: bool): int32 =
+    result = if is_sRGB:
+        case blk_size[0]*100 or blk_size[1]:
+            of 04_04: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR
+            of 05_04: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR
+            of 05_05: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR
+            of 06_05: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR
+            of 06_06: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR
+            of 08_05: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR
+            of 08_06: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR
+            of 10_05: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR
+            of 10_06: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR
+            of 08_08: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR
+            of 10_08: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR
+            of 10_10: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR
+            of 12_10: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR
+            of 12_12: GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR
+            else: 0'i32
+    else:
+        case blk_size[0]*100 or blk_size[1]:
+            of 04_04: GL_COMPRESSED_RGBA_ASTC_4x4_KHR
+            of 05_04: GL_COMPRESSED_RGBA_ASTC_5x4_KHR
+            of 05_05: GL_COMPRESSED_RGBA_ASTC_5x5_KHR
+            of 06_05: GL_COMPRESSED_RGBA_ASTC_6x5_KHR
+            of 06_06: GL_COMPRESSED_RGBA_ASTC_6x6_KHR
+            of 08_05: GL_COMPRESSED_RGBA_ASTC_8x5_KHR
+            of 08_06: GL_COMPRESSED_RGBA_ASTC_8x6_KHR
+            of 10_05: GL_COMPRESSED_RGBA_ASTC_10x5_KHR
+            of 10_06: GL_COMPRESSED_RGBA_ASTC_10x6_KHR
+            of 08_08: GL_COMPRESSED_RGBA_ASTC_8x8_KHR
+            of 10_08: GL_COMPRESSED_RGBA_ASTC_10x8_KHR
+            of 10_10: GL_COMPRESSED_RGBA_ASTC_10x10_KHR
+            of 12_10: GL_COMPRESSED_RGBA_ASTC_12x10_KHR
+            of 12_12: GL_COMPRESSED_RGBA_ASTC_12x12_KHR
+            else: 0'i32
+    assert result != 0, "Invalid ASTC block size " & $blk_size
diff --git a/libs/ddx_ktx/impl.c b/libs/dds_ktx/impl.c
similarity index 100%
rename from libs/ddx_ktx/impl.c
rename to libs/dds_ktx/impl.c