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.
43 lines
1.3 KiB
Plaintext
43 lines
1.3 KiB
Plaintext
// `List(Protocol)` appended from inside a helper function, dispatched
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// repeatedly from `main` after the helper returns. Exercises the heap-copy
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// path for both implicit-erasure-on-append and pre-erased protocol values.
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#import "modules/std.sx";
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Sizable :: protocol {
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size :: () -> s64;
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}
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Leaf :: struct { value: s64; }
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impl Sizable for Leaf {
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size :: (self: *Leaf) -> s64 { self.value; }
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}
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add :: (items: *List(Sizable), w: Leaf) {
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p := w;
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items.append(p); // protocol value created from stack local `p`
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}
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main :: () -> void {
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// Works: protocol value created in main, appended to list
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out("=== Created in main ===\n");
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list_a : List(Sizable) = .{};
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s : Sizable = Leaf.{ value = 42 };
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list_a.append(s);
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r1 := list_a.items[0].size();
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print("first: {} (expected 42)\n", r1);
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r2 := list_a.items[0].size();
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print("second: {} (expected 42)\n", r2);
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// BUG: protocol value created in add(), first dispatch works, second crashes
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out("=== Created in add() ===\n");
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list_b : List(Sizable) = .{};
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add(@list_b, Leaf.{ value = 99 });
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r3 := list_b.items[0].size();
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print("first: {} (expected 99)\n", r3); // works (stack not yet clobbered)
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r4 := list_b.items[0].size();
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print("second: {} (expected 99)\n", r4); // CRASH: stack memory reused
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out("=== OK ===\n");
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}
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