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.
49 lines
1.4 KiB
Plaintext
49 lines
1.4 KiB
Plaintext
// Protocol value as a field of a wrapper struct, constructed from a stack
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// local inside a function and appended to a `List`. The payload must be
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// heap-copied so dispatch survives the constructing function returning.
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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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Widget :: struct { value: s64; }
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impl Sizable for Widget {
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size :: (self: *Widget) -> s64 { self.value; }
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}
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// Wrapper struct with a protocol field (like ViewChild)
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Item :: struct {
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view: Sizable;
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}
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Container :: struct {
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items: List(Item);
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add :: (self: *Container, w: Widget) {
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p := w; // local copy
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self.items.append(Item.{ view = p }); // protocol created from stack local `p`
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// Works here: stack local `p` is still alive
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out("inside add: ");
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print("{}\n", self.items.items[self.items.len - 1].view.size());
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}
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}
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main :: () -> void {
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c : Container = .{};
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c.add(Widget.{ value = 42 });
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c.add(Widget.{ value = 99 });
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// BUG: items[0] should return 42, but returns 99 (reads items[1]'s stack slot)
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// Both protocol values point to the same stack address (the `p` local in add())
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r0 := c.items.items[0].view.size();
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r1 := c.items.items[1].view.size();
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print("items[0] = {} (expected 42)\n", r0);
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print("items[1] = {} (expected 99)\n", r1);
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// With more stack activity between add() and the reads, this crashes
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// (stack memory overwritten by other function calls)
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}
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