blendthumb.hh File Reference

#include <optional>
#include "BLI_array.hh"
#include "BLI_vector.hh"

Go to the source code of this file.

Classes
struct	Thumbnail

Macros
#define	MAKE_ID(a, b, c, d)   ((int)(d) << 24 | (int)(c) << 16 | (b) << 8 | (a))

Enumerations
enum	eThumbStatus {   BT_OK = 0 , BT_FILE_ERR = 1 , BT_COMPRES_ERR = 2 , BT_DECOMPRESS_ERR = 3 ,   BT_INVALID_FILE = 4 , BT_EARLY_VERSION = 5 , BT_INVALID_THUMB = 6 , BT_ERROR = 9 }

Functions
std::optional< blender::Vector< uint8_t > >	blendthumb_create_png_data_from_thumb (const Thumbnail *thumb)
eThumbStatus	blendthumb_create_thumb_from_file (FileReader *rawfile, Thumbnail *thumb)

Detailed Description

Shared thumbnail extraction logic.

Used for both MS-Windows DLL and Unix command line.

Definition in file blendthumb.hh.

Macro Definition Documentation

MAKE_ID

#define MAKE_ID	(		a,
			b,
			c,
			d )   ((int)(d) << 24 | (int)(c) << 16 | (b) << 8 | (a))

Definition at line 53 of file blendthumb.hh.

Referenced by blendthumb_create_png_data_from_thumb(), and blendthumb_extract_from_file_impl().

Enumeration Type Documentation

eThumbStatus

enum eThumbStatus

Enumerator
BT_OK
BT_FILE_ERR
BT_COMPRES_ERR
BT_DECOMPRESS_ERR
BT_INVALID_FILE
BT_EARLY_VERSION
BT_INVALID_THUMB
BT_ERROR

Definition at line 28 of file blendthumb.hh.

Function Documentation

blendthumb_create_png_data_from_thumb()

std::optional< blender::Vector< uint8_t > > blendthumb_create_png_data_from_thumb

(

const Thumbnail *

thumb

)

Definition at line 83 of file blendthumb_png.cc.

References BLI_assert, Thumbnail::data, blender::Vector< T, InlineBufferCapacity, Allocator >::extend_unchecked(), filtered_rows_from_thumb(), Thumbnail::height, blender::Array< T, InlineBufferCapacity, Allocator >::is_empty(), MAKE_ID, png_chunk_create(), PNG_CHUNK_EXTRA, png_extend_native_int32(), blender::Vector< T, InlineBufferCapacity, Allocator >::reserve(), blender::Vector< T, InlineBufferCapacity, Allocator >::size(), Thumbnail::width, and zlib_compress().

Referenced by extract_png_from_blend_file().

blendthumb_create_thumb_from_file()

eThumbStatus blendthumb_create_thumb_from_file	(	FileReader *	rawfile,
		Thumbnail *	thumb )

This function extracts the thumbnail from the .blend file into thumb. Returns BT_OK for success and the relevant error code otherwise.

Definition at line 171 of file blendthumb_extract.cc.

References blend_header_check_magic(), blend_header_is_endian_switch_needed(), blend_header_is_version_valid(), blend_header_pointer_size(), blendthumb_extract_from_file_impl(), BLI_file_magic_is_gzip(), BLI_file_magic_is_zstd(), BLI_filereader_new_gzip(), BLI_filereader_new_zstd(), BLI_str_startswith(), BT_EARLY_VERSION, BT_ERROR, BT_INVALID_FILE, BT_OK, FileReader::close, endian_switch(), FileReader::read, FileReader::seek, and thumb_data_vertical_flip().

Referenced by extract_png_from_blend_file(), and CBlendThumb::GetThumbnail().