diff options
| author | Treeki <treeki@gmail.com> | 2014-06-03 05:55:54 +0200 |
|---|---|---|
| committer | Treeki <treeki@gmail.com> | 2014-06-03 05:55:54 +0200 |
| commit | 7a9387269e3b123b1647cf59c78cc6c998a9a330 (patch) | |
| tree | 7874647c497a6b6113f660ff27f6f79b7fc7d4aa /ctr/rg_etc1.h | |
| parent | be8b56a7f0a8f6ba5456a099b61d032fd8aa2f61 (diff) | |
| download | LayoutStudio-7a9387269e3b123b1647cf59c78cc6c998a9a330.tar.gz LayoutStudio-7a9387269e3b123b1647cf59c78cc6c998a9a330.zip | |
experimental 3DS support
Diffstat (limited to '')
| -rw-r--r-- | ctr/rg_etc1.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/ctr/rg_etc1.h b/ctr/rg_etc1.h new file mode 100644 index 0000000..9a70150 --- /dev/null +++ b/ctr/rg_etc1.h @@ -0,0 +1,76 @@ +// File: rg_etc1.h - Fast, high quality ETC1 block packer/unpacker - Rich Geldreich <richgel99@gmail.com>
+// Please see ZLIB license at the end of this file.
+#pragma once
+
+namespace rg_etc1
+{
+ // Unpacks an 8-byte ETC1 compressed block to a block of 4x4 32bpp RGBA pixels.
+ // Returns false if the block is invalid. Invalid blocks will still be unpacked with clamping.
+ // This function is thread safe, and does not dynamically allocate any memory.
+ // If preserve_alpha is true, the alpha channel of the destination pixels will not be overwritten. Otherwise, alpha will be set to 255.
+ bool unpack_etc1_block(const void *pETC1_block, unsigned int* pDst_pixels_rgba, bool preserve_alpha = false);
+
+ // Quality setting = the higher the quality, the slower.
+ // To pack large textures, it is highly recommended to call pack_etc1_block() in parallel, on different blocks, from multiple threads (particularly when using cHighQuality).
+ enum etc1_quality
+ {
+ cLowQuality,
+ cMediumQuality,
+ cHighQuality,
+ };
+
+ struct etc1_pack_params
+ {
+ etc1_quality m_quality;
+ bool m_dithering;
+
+ inline etc1_pack_params()
+ {
+ clear();
+ }
+
+ void clear()
+ {
+ m_quality = cHighQuality;
+ m_dithering = false;
+ }
+ };
+
+ // Important: pack_etc1_block_init() must be called before calling pack_etc1_block().
+ void pack_etc1_block_init();
+
+ // Packs a 4x4 block of 32bpp RGBA pixels to an 8-byte ETC1 block.
+ // 32-bit RGBA pixels must always be arranged as (R,G,B,A) (R first, A last) in memory, independent of platform endianness. A should always be 255.
+ // Returns squared error of result.
+ // This function is thread safe, and does not dynamically allocate any memory.
+ // pack_etc1_block() does not currently support "perceptual" colorspace metrics - it primarily optimizes for RGB RMSE.
+ unsigned int pack_etc1_block(void* pETC1_block, const unsigned int* pSrc_pixels_rgba, etc1_pack_params& pack_params);
+
+} // namespace rg_etc1
+
+//------------------------------------------------------------------------------
+//
+// rg_etc1 uses the ZLIB license:
+// http://opensource.org/licenses/Zlib
+//
+// Copyright (c) 2012 Rich Geldreich
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+//------------------------------------------------------------------------------
|