blendthumb_png.cc File Reference

#include <cstring>
#include <optional>
#include <zlib.h>
#include "blendthumb.hh"
#include "BLI_endian_defines.h"
#include "BLI_endian_switch.h"
#include "BLI_vector.hh"

Go to the source code of this file.

Macros
#define	PNG_CHUNK_EXTRA   12

Functions
static void	png_extend_native_int32 (blender::Vector< uint8_t > &output, int32_t data)
static void	png_chunk_create (blender::Vector< uint8_t > &output, const uint32_t tag, const blender::Vector< uint8_t > &data)
static blender::Vector< uint8_t >	filtered_rows_from_thumb (const Thumbnail *thumb)
static std::optional< blender::Vector< uint8_t > >	zlib_compress (const blender::Vector< uint8_t > &data)
std::optional< blender::Vector< uint8_t > >	blendthumb_create_png_data_from_thumb (const Thumbnail *thumb)

Detailed Description

Expose blendthumb_create_png_data_from_thumb that creates the PNG data but does not write it to a file.

Definition in file blendthumb_png.cc.

Macro Definition Documentation

PNG_CHUNK_EXTRA

#define PNG_CHUNK_EXTRA   12

The number of bytes each chunk uses on top of the data that's written.

Definition at line 31 of file blendthumb_png.cc.

Referenced by blendthumb_create_png_data_from_thumb().

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().

filtered_rows_from_thumb()

static blender::Vector< uint8_t > filtered_rows_from_thumb ( const Thumbnail * thumb )

static

Definition at line 47 of file blendthumb_png.cc.

References blender::Vector< T, InlineBufferCapacity, Allocator >::append_unchecked(), BLI_assert, Thumbnail::data, blender::Vector< T, InlineBufferCapacity, Allocator >::extend_unchecked(), Thumbnail::height, blender::Vector< T, InlineBufferCapacity, Allocator >::reserve(), blender::Vector< T, InlineBufferCapacity, Allocator >::size(), and Thumbnail::width.

Referenced by blendthumb_create_png_data_from_thumb().

png_chunk_create()

static void png_chunk_create ( blender::Vector< uint8_t > & output, const uint32_t tag, const blender::Vector< uint8_t > & data )

static

Definition at line 33 of file blendthumb_png.cc.

References png_extend_native_int32().

Referenced by blendthumb_create_png_data_from_thumb().

png_extend_native_int32()

static void png_extend_native_int32 ( blender::Vector< uint8_t > & output, int32_t data )

static

Definition at line 22 of file blendthumb_png.cc.

References BLI_endian_switch_int32(), ENDIAN_ORDER, and L_ENDIAN.

Referenced by blendthumb_create_png_data_from_thumb(), and png_chunk_create().

zlib_compress()

static std::optional< blender::Vector< uint8_t > > zlib_compress ( const blender::Vector< uint8_t > & data )

static

Definition at line 63 of file blendthumb_png.cc.

References blender::Vector< T, InlineBufferCapacity, Allocator >::data(), blender::Vector< T, InlineBufferCapacity, Allocator >::resize(), and blender::Vector< T, InlineBufferCapacity, Allocator >::size().

Referenced by blendthumb_create_png_data_from_thumb().