initial commit, 4.5 stable

thirdparty/libktx/lib/texture2.h

@@ -0,0 +1,67 @@
+/* -*- tab-width: 4; -*- */
+/* vi: set sw=2 ts=4 expandtab textwidth=70: */
+
+/*
+ * Copyright 2019-2020 The Khronos Group Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @internal
+ * @file
+ * @~English
+ *
+ * @brief Declare internal ktxTexture2 functions for sharing between
+ *        compilation units.
+ *
+ * These functions are private and should not be used outside the library.
+ */
+
+#ifndef _TEXTURE2_H_
+#define _TEXTURE2_H_
+
+#include "texture.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define CLASS ktxTexture2
+#include "texture_funcs.inl"
+#undef CLASS
+
+typedef struct ktxTexture2_private {
+    ktx_uint8_t* _supercompressionGlobalData;
+    ktx_uint32_t _requiredLevelAlignment;
+    ktx_uint64_t _sgdByteLength;
+    ktx_uint64_t _firstLevelFileOffset; /*!< Always 0, unless the texture was
+                                         created from a stream and the image
+                                         data is not yet loaded. */
+    // Must be last so it can grow.
+    ktxLevelIndexEntry _levelIndex[1]; /*!< Offsets in this index are from the
+                                        start of the image data. Use
+                                        ktxTexture_levelStreamOffset() and
+                                        ktxTexture_levelDataOffset(). The former
+                                        will add the above file offset to the
+                                        index offset. */
+} ktxTexture2_private;
+
+
+KTX_error_code
+ktxTexture2_constructCopy(ktxTexture2* This, ktxTexture2* orig);
+KTX_error_code
+ktxTexture2_constructFromStreamAndHeader(ktxTexture2* This, ktxStream* pStream,
+                                         KTX_header2* pHeader,
+                                         ktxTextureCreateFlags createFlags);
+
+ktx_uint64_t ktxTexture2_calcDataSizeTexture(ktxTexture2* This);
+ktx_size_t ktxTexture2_calcLevelOffset(ktxTexture2* This, ktx_uint32_t level);
+ktx_uint32_t ktxTexture2_calcRequiredLevelAlignment(ktxTexture2* This);
+ktx_uint64_t ktxTexture2_levelFileOffset(ktxTexture2* This, ktx_uint32_t level);
+ktx_uint64_t ktxTexture2_levelDataOffset(ktxTexture2* This, ktx_uint32_t level);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _TEXTURE2_H_ */