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QR code improvements

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This commit is contained in:
Zachary Levy
2026-04-21 15:35:55 -07:00
parent a4623a13b5
commit ba522fa051
3 changed files with 247 additions and 109 deletions
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12
draw/examples/textures.odin
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@@ -79,8 +79,8 @@ textures :: proc() {
// -------------------------------------------------------------------------
// QR code texture (R8_UNORM — see rendering note below)
// -------------------------------------------------------------------------
qr, _ := draw_qr.create_from_text("https://odin-lang.org/")
defer draw_qr.destroy(&qr)
qr_texture, _ := draw_qr.register_texture_from_text("https://x.com/miiilato/status/1880241066471051443")
defer draw.unregister_texture(qr_texture)
spin_angle: f32 = 0
@@ -161,16 +161,12 @@ textures :: proc() {
// =====================================================================
ROW2_Y :: f32(190)
// QR code (R8_UNORM texture, nearest sampling)
// NOTE: R8_UNORM samples as (r, 0, 0, 1) in Metal's default swizzle.
// With WHITE tint: dark modules (R=1) → red, light modules (R=0) → black.
// The result is a red-on-black QR code. The white bg rect below is
// occluded by the fully-opaque texture but kept for illustration.
// QR code (RGBA texture with baked colors, nearest sampling)
draw.rectangle(base_layer, {COL1, ROW2_Y, ITEM_SIZE, ITEM_SIZE}, {255, 255, 255, 255}) // white bg
draw.rectangle_texture(
base_layer,
{COL1, ROW2_Y, ITEM_SIZE, ITEM_SIZE},
qr.texture_id,
qr_texture,
sampler = .Nearest_Clamp,
)
draw.text(