58af806b7a
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.
37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
// The sx library ships stb_truetype: `#import "vendors/stb_truetype/
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// stb_truetype.sx"` resolves through the stdlib search paths and the
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// implementation compiles through the object cache. Loads the system
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// Helvetica collection and pins INVARIANTS only (font versions vary
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// across macOS releases): init succeeds, the pixel-height scale is
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// positive, the ascender is positive and the descender negative.
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#import "modules/std.sx";
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fs :: #import "modules/std/fs.sx";
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tt :: #import "vendors/stb_truetype/stb_truetype.sx";
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main :: () -> i32 {
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data := fs.read_file("/System/Library/Fonts/Helvetica.ttc");
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if data == null {
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print("font missing\n");
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return 1;
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}
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bytes := data!;
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off := tt.stbtt_GetFontOffsetForIndex(bytes.ptr, 0);
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print("font offset >= 0: {}\n", off >= 0);
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info : *void = xx context.allocator.alloc_bytes(256);
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ok := tt.stbtt_InitFont(info, bytes.ptr, off);
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print("init ok: {}\n", ok != 0);
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px : f32 = 32.0;
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scale := tt.stbtt_ScaleForPixelHeight(info, px);
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print("scale > 0: {}\n", scale > 0.0);
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ascent : i32 = 0;
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descent : i32 = 0;
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linegap : i32 = 0;
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tt.stbtt_GetFontVMetrics(info, @ascent, @descent, @linegap);
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print("ascent > 0, descent < 0: {} {}\n", ascent > 0, descent < 0);
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0
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}
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