a938c4f900
Phase 8 step 3a of the Metal renderer port:
- New library/modules/gpu/ with types.sx (handles + ClearColor +
TextureFormat enum), api.sx (GPU :: protocol { ... } covering the
lifecycle / per-frame / resource / per-draw surface), and metal.sx
(MetalGPU backend implementing the protocol against CAMetalLayer).
Resource handles are 1-based indices into backend List(*void) tables.
MTL aggregates >16 bytes (MTLRegion, MTLScissorRect) pass via *T to
match arm64 Apple's indirect-by-reference ABI; MTLClearColor + CGSize
go through the HFA path as direct fn-pointer casts on objc_msgSend.
- UIKitPlatform got a gpu_mode: GpuMode toggle + sibling SxMetalView
class registration. In metal mode init skips EAGL context, the
did_finish_launching IMP skips the EAGL drawable-properties dict,
layoutSubviews reads the layer's bounds * dpi_scale into pixel_w/h
instead of allocating a GL renderbuffer, and end_frame is a no-op
(the MetalGPU owns its own present).
- examples/63-metal-clear.sx verifies the pipeline end-to-end on iOS
sim — compiles a pass-through MSL shader (packed_float2/packed_float4
to avoid alignment padding), uploads 3 vertices, draws a colored
triangle on a dark-blue clear.
Compiler fixes (filed-and-fixed in this branch):
- inline if X { return E; } followed by a fall-through final expression
no longer emits two terminators into the same basic block. Verified
by examples/83-inline-if-return-fallthrough.sx.
- Top-level type alias Name :: u32; now resolves correctly as the type
annotation on a global variable (was treated as ptr {}, breaking
comparisons + initializers). Verified by examples/84-global-type-alias.sx.
Issue->feature promotion:
- 16 historical examples/issue-NNNN.sx repros now confirmed-fixed and
renamed to focused feature names (67-82). Each gains a
tests/expected/*.txt + .exit pair so the regression suite covers them.
- 5 stale issue repros deleted (subsumed by broader tests).
Regression suite: 68 passing, 0 failed. macOS chess builds + runs; wasm
chess builds; iOS sim GLES chess still renders the full board; iOS sim
Metal demo renders the triangle.
31 lines
788 B
Plaintext
31 lines
788 B
Plaintext
// impl Protocol for built-in scalar types (f32, s64, bool, u32, ...) —
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// both static dispatch (`f32.lerp(...)`) and protocol-boxed dispatch via
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// `#inline` erasure.
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Lerpable :: protocol #inline {
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lerp :: (b: Self, t: f32) -> Self;
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}
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impl Lerpable for f32 {
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lerp :: (self: f32, b: f32, t: f32) -> f32 { self + (b - self) * t; }
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}
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do_lerp :: (a: Lerpable, b: f32, t: f32) -> f32 {
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a.lerp(b, t);
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}
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main :: () -> void {
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// Static call through impl
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result := f32.lerp(0.0, 10.0, 0.5);
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print("lerp(0, 10, 0.5) = {}\n", result);
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// Protocol dispatch through #inline erasure
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val : f32 = 0.0;
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p : *f32 = @val;
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l : Lerpable = xx p;
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result2 := do_lerp(l, 10.0, 0.25);
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print("lerp(0, 10, 0.25) = {}\n", result2);
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}
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#import "modules/std.sx";
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