雷电芽衣andClaude
c864304695
A layered image editor for Linux and Omarchy, ported from Compositor (github.com/robbietilton/Compositor), whose Swift source is its specification. It reads and writes Compositor's .comp projects. Packages for Ubuntu, Fedora and Arch come from the release workflow; scripts/install/ holds one install script per distribution family, and flake.nix serves NixOS. Co-Authored-By: Claude <noreply@anthropic.com>
20 lines
1.4 KiB
C
20 lines
1.4 KiB
C
#ifndef AdjustPixels_h
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#define AdjustPixels_h
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#include <stdint.h>
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#include <stddef.h>
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// Gradient Map on premultiplied RGBA pixels (4 bytes per pixel, `stride` bytes per row): each pixel's
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// luminance picks a color from `table` (256 × 3 straight sRGB bytes, darkest first). Alpha is kept and
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// fully transparent pixels are left alone.
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void adjust_gradient_map(uint8_t *rgba, size_t width, size_t height, size_t stride, const uint8_t *table);
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// Film grain on premultiplied RGBA pixels: the same brightness change on all three channels, strongest
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// in the midtones. `amount` is 0–100, `size` the grain's scale in document units, and `roughness`
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// (0–100) mixes in per-unit noise. Pixel (x, y) sits at (originX + (x + 0.5) × unitsPerPixel,
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// originY + (y + 0.5) × unitsPerPixel), and its grain depends only on that position and `seed`, so a
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// piece of an image gets the same grain as that part of the whole.
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void adjust_grain(uint8_t *rgba, size_t width, size_t height, size_t stride, double amount, double size,
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double roughness, uint32_t seed, double originX, double originY, double unitsPerPixel);
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// After resampling with a filter that rings (Lanczos), premultiplied RGBA colors can exceed their alpha;
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// this clamps each channel back to its pixel's alpha. `count` is the number of pixels.
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void rgba_clamp_premultiplied(uint8_t *rgba, size_t count);
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#endif
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