crnlib/crn_dxt_hc_common.h

@@ -0,0 +1,43 @@
+// File: crn_dxt_hc_common.h
+// See Copyright Notice and license at the end of inc/crnlib.h
+#pragma once
+
+namespace crnlib
+{
+   struct chunk_tile_desc
+   {
+      // These values are in pixels, and always a multiple of cBlockPixelWidth/cBlockPixelHeight.
+      uint m_x_ofs;
+      uint m_y_ofs;
+      uint m_width;
+      uint m_height;
+      uint m_layout_index;
+   };
+
+   struct chunk_encoding_desc
+   {
+      uint m_num_tiles;
+      chunk_tile_desc m_tiles[4];
+   };
+
+   const uint cChunkPixelWidth = 8;
+   const uint cChunkPixelHeight = 8;
+   const uint cChunkBlockWidth = 2;
+   const uint cChunkBlockHeight = 2;
+
+   const uint cChunkMaxTiles = 4;
+
+   const uint cBlockPixelWidthShift = 2;
+   const uint cBlockPixelHeightShift = 2;
+
+   const uint cBlockPixelWidth = 4;
+   const uint cBlockPixelHeight = 4;
+
+   const uint cNumChunkEncodings = 8;
+   extern chunk_encoding_desc g_chunk_encodings[cNumChunkEncodings];
+
+   const uint cNumChunkTileLayouts = 9;
+   const uint cFirst4x4ChunkTileLayout = 5;
+   extern chunk_tile_desc g_chunk_tile_layouts[cNumChunkTileLayouts];
+ 
+} // namespace crnlib