245 lines
11 KiB
C
245 lines
11 KiB
C
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// File: crn_ktx_texture.h
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#ifndef _KTX_TEXTURE_H_
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#define _KTX_TEXTURE_H_
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#ifdef _MSC_VER
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#pragma once
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#endif
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#include "crn_data_stream_serializer.h"
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#define KTX_ENDIAN 0x04030201
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#define KTX_OPPOSITE_ENDIAN 0x01020304
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namespace crnlib
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{
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extern const uint8 s_ktx_file_id[12];
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struct ktx_header
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{
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uint8 m_identifier[12];
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uint32 m_endianness;
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uint32 m_glType;
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uint32 m_glTypeSize;
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uint32 m_glFormat;
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uint32 m_glInternalFormat;
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uint32 m_glBaseInternalFormat;
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uint32 m_pixelWidth;
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uint32 m_pixelHeight;
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uint32 m_pixelDepth;
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uint32 m_numberOfArrayElements;
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uint32 m_numberOfFaces;
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uint32 m_numberOfMipmapLevels;
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uint32 m_bytesOfKeyValueData;
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void clear()
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{
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memset(this, 0, sizeof(*this));
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}
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void endian_swap()
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{
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utils::endian_swap_mem32(&m_endianness, (sizeof(*this) - sizeof(m_identifier)) / sizeof(uint32));
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}
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};
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typedef crnlib::vector<uint8_vec> ktx_key_value_vec;
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typedef crnlib::vector<uint8_vec> ktx_image_data_vec;
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// Compressed pixel data formats: ETC1, DXT1, DXT3, DXT5
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enum
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{
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KTX_ETC1_RGB8_OES = 0x8D64, KTX_RGB_S3TC = 0x83A0, KTX_RGB4_S3TC = 0x83A1, KTX_COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0,
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KTX_COMPRESSED_RGBA_S3TC_DXT1_EXT = 0x83F1, KTX_COMPRESSED_SRGB_S3TC_DXT1_EXT = 0x8C4C, KTX_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT = 0x8C4D,
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KTX_RGBA_S3TC = 0x83A2, KTX_RGBA4_S3TC = 0x83A3, KTX_COMPRESSED_RGBA_S3TC_DXT3_EXT = 0x83F2, KTX_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT = 0x8C4E,
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KTX_COMPRESSED_RGBA_S3TC_DXT5_EXT = 0x83F3, KTX_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT = 0x8C4F, KTX_RGBA_DXT5_S3TC = 0x83A4, KTX_RGBA4_DXT5_S3TC = 0x83A5,
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KTX_COMPRESSED_RED_RGTC1_EXT = 0x8DBB, KTX_COMPRESSED_SIGNED_RED_RGTC1_EXT = 0x8DBC, KTX_COMPRESSED_RED_GREEN_RGTC2_EXT = 0x8DBD, KTX_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT = 0x8DBE,
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KTX_COMPRESSED_LUMINANCE_LATC1_EXT = 0x8C70, KTX_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT = 0x8C71, KTX_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT = 0x8C72, KTX_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT = 0x8C73
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};
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// Pixel formats (various internal, base, and base internal formats)
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enum
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{
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KTX_R8 = 0x8229, KTX_R8UI = 0x8232, KTX_RGB8 = 0x8051, KTX_SRGB8 = 0x8C41, KTX_SRGB = 0x8C40, KTX_SRGB_ALPHA = 0x8C42,
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KTX_SRGB8_ALPHA8 = 0x8C43, KTX_RGBA8 = 0x8058, KTX_STENCIL_INDEX = 0x1901, KTX_DEPTH_COMPONENT = 0x1902, KTX_DEPTH_STENCIL = 0x84F9, KTX_RED = 0x1903,
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KTX_GREEN = 0x1904, KTX_BLUE = 0x1905, KTX_ALPHA = 0x1906, KTX_RG = 0x8227, KTX_RGB = 0x1907, KTX_RGBA = 0x1908, KTX_BGR = 0x80E0, KTX_BGRA = 0x80E1,
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KTX_RED_INTEGER = 0x8D94, KTX_GREEN_INTEGER = 0x8D95, KTX_BLUE_INTEGER = 0x8D96, KTX_ALPHA_INTEGER = 0x8D97, KTX_RGB_INTEGER = 0x8D98, KTX_RGBA_INTEGER = 0x8D99,
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KTX_BGR_INTEGER = 0x8D9A, KTX_BGRA_INTEGER = 0x8D9B, KTX_LUMINANCE = 0x1909, KTX_LUMINANCE_ALPHA = 0x190A, KTX_RG_INTEGER = 0x8228, KTX_RG8 = 0x822B,
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KTX_ALPHA8 = 0x803C, KTX_LUMINANCE8 = 0x8040, KTX_LUMINANCE8_ALPHA8 = 0x8045
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};
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// Pixel data types
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enum
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{
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KTX_UNSIGNED_BYTE = 0x1401, KTX_BYTE = 0x1400, KTX_UNSIGNED_SHORT = 0x1403, KTX_SHORT = 0x1402,
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KTX_UNSIGNED_INT = 0x1405, KTX_INT = 0x1404, KTX_HALF_FLOAT = 0x140B, KTX_FLOAT = 0x1406,
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KTX_UNSIGNED_BYTE_3_3_2 = 0x8032, KTX_UNSIGNED_BYTE_2_3_3_REV = 0x8362, KTX_UNSIGNED_SHORT_5_6_5 = 0x8363,
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KTX_UNSIGNED_SHORT_5_6_5_REV = 0x8364, KTX_UNSIGNED_SHORT_4_4_4_4 = 0x8033, KTX_UNSIGNED_SHORT_4_4_4_4_REV = 0x8365,
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KTX_UNSIGNED_SHORT_5_5_5_1 = 0x8034, KTX_UNSIGNED_SHORT_1_5_5_5_REV = 0x8366, KTX_UNSIGNED_INT_8_8_8_8 = 0x8035,
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KTX_UNSIGNED_INT_8_8_8_8_REV = 0x8367, KTX_UNSIGNED_INT_10_10_10_2 = 0x8036, KTX_UNSIGNED_INT_2_10_10_10_REV = 0x8368,
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KTX_UNSIGNED_INT_24_8 = 0x84FA, KTX_UNSIGNED_INT_10F_11F_11F_REV = 0x8C3B, KTX_UNSIGNED_INT_5_9_9_9_REV = 0x8C3E,
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KTX_FLOAT_32_UNSIGNED_INT_24_8_REV = 0x8DAD
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};
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bool is_packed_pixel_ogl_type(uint32 ogl_type);
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uint get_ogl_type_size(uint32 ogl_type);
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bool get_ogl_fmt_desc(uint32 ogl_fmt, uint32 ogl_type, uint& block_dim, uint& bytes_per_block);
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uint get_ogl_type_size(uint32 ogl_type);
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uint32 get_ogl_base_internal_fmt(uint32 ogl_fmt);
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class ktx_texture
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{
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public:
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ktx_texture()
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{
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clear();
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}
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ktx_texture(const ktx_texture& other)
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{
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*this = other;
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}
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ktx_texture& operator= (const ktx_texture& rhs)
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{
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if (this == &rhs)
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return *this;
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clear();
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m_header = rhs.m_header;
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m_key_values = rhs.m_key_values;
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m_image_data = rhs.m_image_data;
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m_block_dim = rhs.m_block_dim;
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m_bytes_per_block = rhs.m_bytes_per_block;
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m_opposite_endianness = rhs.m_opposite_endianness;
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return *this;
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}
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void clear()
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{
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m_header.clear();
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m_key_values.clear();
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m_image_data.clear();
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m_block_dim = 0;
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m_bytes_per_block = 0;
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m_opposite_endianness = false;
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}
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// High level methods
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bool read_from_stream(data_stream_serializer& serializer);
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bool write_to_stream(data_stream_serializer& serializer, bool no_keyvalue_data = false);
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bool init_2D(uint width, uint height, uint num_mips, uint32 ogl_internal_fmt, uint32 ogl_fmt, uint32 ogl_type);
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bool init_2D_array(uint width, uint height, uint num_mips, uint array_size, uint32 ogl_internal_fmt, uint32 ogl_fmt, uint32 ogl_type);
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bool init_3D(uint width, uint height, uint depth, uint num_mips, uint32 ogl_internal_fmt, uint32 ogl_fmt, uint32 ogl_type);
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bool init_cubemap(uint dim, uint num_mips, uint32 ogl_internal_fmt, uint32 ogl_fmt, uint32 ogl_type);
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bool check_header() const;
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bool consistency_check() const;
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// General info
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bool is_valid() const { return (m_header.m_pixelWidth > 0) && (m_image_data.size() > 0); }
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uint get_width() const { return m_header.m_pixelWidth; }
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uint get_height() const { return CRNLIB_MAX(m_header.m_pixelHeight, 1); }
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uint get_depth() const { return CRNLIB_MAX(m_header.m_pixelDepth, 1); }
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uint get_num_mips() const { return CRNLIB_MAX(m_header.m_numberOfMipmapLevels, 1); }
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uint get_array_size() const { return CRNLIB_MAX(m_header.m_numberOfArrayElements, 1); }
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uint get_num_faces() const { return m_header.m_numberOfFaces; }
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uint32 get_ogl_type() const { return m_header.m_glType; }
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uint32 get_ogl_fmt() const { return m_header.m_glFormat; }
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uint32 get_ogl_base_fmt() const { return m_header.m_glBaseInternalFormat; }
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uint32 get_ogl_internal_fmt() const { return m_header.m_glInternalFormat; }
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uint get_total_images() const { return get_num_mips() * (get_depth() * get_num_faces() * get_array_size()); }
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bool is_compressed() const { return m_block_dim > 1; }
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bool is_uncompressed() const { return !is_compressed(); }
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bool get_opposite_endianness() const { return m_opposite_endianness; }
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void set_opposite_endianness(bool flag) { m_opposite_endianness = flag; }
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uint32 get_block_dim() const { return m_block_dim; }
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uint32 get_bytes_per_block() const { return m_bytes_per_block; }
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const ktx_header& get_header() const { return m_header; }
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// Key values
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const ktx_key_value_vec& get_key_value_vec() const { return m_key_values; }
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ktx_key_value_vec& get_key_value_vec() { return m_key_values; }
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const uint8_vec* find_key(const char* pKey) const;
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bool get_key_value_as_string(const char* pKey, dynamic_string& str) const;
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uint add_key_value(const char* pKey, const void* pVal, uint val_size);
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uint add_key_value(const char* pKey, const char* pVal) { return add_key_value(pKey, pVal, static_cast<uint>(strlen(pVal)) + 1); }
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// Image data
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uint get_num_images() const { return m_image_data.size(); }
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const uint8_vec& get_image_data(uint image_index) const { return m_image_data[image_index]; }
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uint8_vec& get_image_data(uint image_index) { return m_image_data[image_index]; }
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const uint8_vec& get_image_data(uint mip_index, uint array_index, uint face_index, uint zslice_index) const { return get_image_data(get_image_index(mip_index, array_index, face_index, zslice_index)); }
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uint8_vec& get_image_data(uint mip_index, uint array_index, uint face_index, uint zslice_index) { return get_image_data(get_image_index(mip_index, array_index, face_index, zslice_index)); }
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const ktx_image_data_vec& get_image_data_vec() const { return m_image_data; }
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ktx_image_data_vec& get_image_data_vec() { return m_image_data; }
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void add_image(uint face_index, uint mip_index, const void* pImage, uint image_size)
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{
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const uint image_index = get_image_index(mip_index, 0, face_index, 0);
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if (image_index >= m_image_data.size())
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m_image_data.resize(image_index + 1);
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if (image_size)
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{
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uint8_vec& v = m_image_data[image_index];
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v.resize(image_size);
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memcpy(&v[0], pImage, image_size);
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}
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}
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uint get_image_index(uint mip_index, uint array_index, uint face_index, uint zslice_index) const
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{
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CRNLIB_ASSERT((mip_index < get_num_mips()) && (array_index < get_array_size()) && (face_index < get_num_faces()) && (zslice_index < get_depth()));
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return zslice_index + (face_index * get_depth()) + (array_index * (get_depth() * get_num_faces())) + (mip_index * (get_depth() * get_num_faces() * get_array_size()));
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}
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void get_mip_dim(uint mip_index, uint& mip_width, uint& mip_height) const
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{
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CRNLIB_ASSERT(mip_index < get_num_mips());
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mip_width = CRNLIB_MAX(get_width() >> mip_index, 1);
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mip_height = CRNLIB_MAX(get_height() >> mip_index, 1);
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}
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void get_mip_dim(uint mip_index, uint& mip_width, uint& mip_height, uint& mip_depth) const
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{
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CRNLIB_ASSERT(mip_index < get_num_mips());
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mip_width = CRNLIB_MAX(get_width() >> mip_index, 1);
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mip_height = CRNLIB_MAX(get_height() >> mip_index, 1);
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mip_depth = CRNLIB_MAX(get_depth() >> mip_index, 1);
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}
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private:
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ktx_header m_header;
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ktx_key_value_vec m_key_values;
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ktx_image_data_vec m_image_data;
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uint32 m_block_dim;
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uint32 m_bytes_per_block;
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bool m_opposite_endianness;
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bool compute_pixel_info();
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};
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} // namespace crnlib
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#endif // #ifndef _KTX_TEXTURE_H_
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