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library: vendors/stb_image + vendors/stb_truetype — stb ships with sx

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The stb headers move from the repo-root vendors/ (resolvable only
with CWD = sx repo) into library/vendors/ following the sqlite
convention — bindings module + c/ sources + provenance README — so
'#import "vendors/stb_image/stb_image.sx"' (image v2.30 + image_write
v1.16) and '#import "vendors/stb_truetype/stb_truetype.sx"' (v1.26)
work from any consumer via the stdlib search paths. modules/ffi/stb.sx
dissolves into the stb_image vendor; modules/ffi/stb_truetype.sx keeps
its non-stb text-shaping companions and re-imports the vendored unit.
examples/1625 pins a deterministic in-memory BMP decode; examples/1626
pins font init + metric invariants against the system Helvetica.
This commit is contained in:
agra
2026-06-12 17:50:21 +03:00
parent 2097772ec9
commit 58af806b7a
22 changed files with 163 additions and 12 deletions
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35
examples/1625-vendor-stb-image-decode.sx Normal file
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// The sx library ships stb_image: `#import "vendors/stb_image/
// stb_image.sx"` resolves through the stdlib search paths and the
// implementation compiles through the object cache. Decodes a 2x2
// 24-bit BMP built in memory — fully deterministic: dimensions,
// channel count, and the top-left pixel (blue) are pinned.
#import "modules/std.sx";
stb :: #import "vendors/stb_image/stb_image.sx";
main :: () -> i32 {
// BITMAPFILEHEADER (14) + BITMAPINFOHEADER (40) + 2 rows of
// 2 BGR pixels padded to 4-byte rows (8 each) = 70 bytes.
// Bottom row: red, green; top row: blue, white (BMP is bottom-up).
bmp : [70]u8 = .{
66, 77, 70, 0, 0, 0, 0, 0, 0, 0, 54, 0, 0, 0,
40, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 1, 0, 24, 0,
0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 255, 0, 255, 0, 0, 0,
255, 0, 0, 255, 255, 255, 0, 0,
};
w : i32 = 0;
h : i32 = 0;
ch : i32 = 0;
img := stb.stbi_load_from_memory(@bmp[0], 70, @w, @h, @ch, 3);
if xx img == 0 {
print("decode failed\n");
return 1;
}
p : [*]u8 = xx img;
print("decoded {}x{} ({} channels)\n", w, h, ch);
print("top-left pixel: {} {} {}\n", p[0], p[1], p[2]);
stb.stbi_image_free(xx img);
0
}