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README.md
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@ -7,12 +7,12 @@ PIKTURE is a high-performance, lossless image format designed for systems where
Standard formats like PNG are often bottlenecked by heavy decompression algorithms (DEFLATE/ZIP). PIKTURE replaces complex bit-shuffling with a hardware-friendly **INDEX + Delta** encoding. This allows the CPU to stream pixels directly to memory with minimal overhead, acting closer to a memory copy operation than a math-heavy decompression.
### ✨ Key Features
- **Lossless:** 100% bit-perfect reproduction of RGBA data.
- **Lossless:** 100% bit-perfect reproduction of image data.
- **Dynamic Color Depth:** Full support for 1, 2, 4, 8, 16, 24, and 32-bit depths, natively handling Grayscale, Grayscale+Alpha, RGB, and RGBA formats without bloat.
- **Ultra-Fast:** Near-memcpy decoding speeds utilizing cache-friendly algorithms.
- **Hardware Acceleration:** Optional SIMD (AVX/NEON) and OpenMP multithreading support.
- **Small Footprint:** Two-file C library (`.c` / `.h`) with zero external dependencies.
- **Endian-Aware:** Cross-architecture compatibility (Little-Endian / Big-Endian).
- **Smart Alpha:** Automatically optimizes storage when transparency is not used.
- **Strict Endian-Awareness:** Active cross-architecture compatibility (Little-Endian / Big-Endian) built directly into the parser.
---
@ -49,7 +49,7 @@ int main() {
return 1;
}
printf("Loaded %dx%d image.\n", img->width, img->height);
printf("Loaded %dx%d image with %d channels.\n", img->width, img->height, img->channels);
// Save an image
pikture_save("output.pik", img);
@ -94,7 +94,7 @@ gcc -O3 -DPIKT_USE_SIMD -DPIKT_USE_THREADS -fopenmp main.c pikture.c -o myapp
## 🔬 Technical Specification
PIKTURE is a binary format. All multi-byte integers in the header are stored in **Big-Endian** format.
PIKTURE is a binary format. The 11-byte header is dynamically interpreted based on the Endianness flag to ensure universal portability.
### 1. File Header (11 Bytes)
@ -104,8 +104,8 @@ PIKTURE is a binary format. All multi-byte integers in the header are stored in
| `0x04` | 1 byte | `uint8_t` | Version number (Currently `101`) |
| `0x05` | 2 bytes | `uint16_t` | Image Width |
| `0x07` | 2 bytes | `uint16_t` | Image Height |
| `0x09` | 1 byte | `uint8_t` | Bit Depth (Currently `32` for RGBA) |
| `0x0A` | 1 byte | `uint8_t` | Endianness flag (`0` = Little, `1` = Big) |
| `0x09` | 1 byte | `uint8_t` | Bit Depth (Supports 1/2/4/8/16/24/32-bit depths) |
| `0x0A` | 1 byte | `uint8_t` | Endianness flag (`0` = Little, `1` = Big). Dictates Width/Height reading logic. |
### 2. Byte-Stream Protocol
@ -118,10 +118,10 @@ Immediately following the header is the compressed pixel data payload. PIKTURE u
* `0xFE` (**RGB**): Full 24-bit color change (Alpha remains unchanged). Followed by 3 bytes (R, G, B).
* `0xFF` (**RGBA**): Full 32-bit color change. Followed by 4 bytes (R, G, B, A).
*Note: For depths lower than 32-bit (e.g., Grayscale or 24-bit RGB), the decoder dynamically maps the byte-stream to the correct channel layout.*
---
## 📜 License
This project is licensed under the **MIT License**. Free to use, modify, and distribute for personal and commercial purposes.
![Pikture Icon](other/Pikture.svg)