XNZ is a collection of ANSI/C89 compatible header-only APIs designed to support decoding block compressed media container formats while streaming from source (eg over a network connection or from file on disk) with the intent of queueing resources to an accelerated hardware pipeline.
Motivation to author a custom streaming block decompression library began with a desire for cross-platform
parity with Apple's compression_stream API on Microsoft platforms without the need to explicitly bootstrap zlib. xnz_png_inflate_blobs provides
an analogous implementation using compression_stream_process with the COMPRESSION_ZLIB algorithm for comparison.
BC[#], KTX and GDeflate container support to come. No roadmap for LZ4 as Apple's compression_stream and Pixar's USD implementations are satisfactory.
| Library | Category | Description | Specification |
|---|---|---|---|
| xnz.h | decoder | bitstream loading/decoding from memory | RFC 1951 |
| xnz_icc_profile.h | colorspace | color profile loading/decoding from file/memory | ICC |
| xnz_bmp_image.h | image | image encoding/export to file/memory | BMP |
| xnz_dds_image.h | image | image loading/decoding from file/memory | DDS |
| xnz_png_image.h | image | image loading/decoding from file/memory | PNG |
| xnz_sgi_image.h | image | image loading/decoding from file/memory | SGI |
XNG is a sister layer that extends XNZ with other image formats that aren't based on block compression and additionally wraps all XNZ header-only library implementations for consumption via a single shared library/API.
| File | Category | Description | Type |
|---|---|---|---|
| xng_image_formats.h | enum | xng image api enumerations + typedefs | ENUM |
| xng_image_buffer.h | buffer | raw pixel buffer raster routines | PIXELS |
| xng_raw_image.h | image | image loading/decoding from file/memory | UINT8 |
| xng_fpf_image.h | image | image loading/decoding from file/memory | FLOAT32 |
| xng_ttf_font.h | font | parse, decode, and rasterize characters from truetype fonts | TRUETYPE |
| xng_font.c | virtual | base "class" to expose all component font apis | STRUCT |
| xng_image.c | virtual | base "class" to expose all component image apis | STRUCT |
| xng.h | header | global library header to expose all xnz + xng apis | HEADER |
XNG is the modular Image Resource Component Layer responsible for loading and queuing transfer of texture data to 3rdGen's Accelerated Graphics Layer, Core Render. CoreRender's C libraries embody the foundational layer of 3rdGen's proprietary simulation engine and cross-platform application framework.