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.
80 lines
2.2 KiB
Plaintext
80 lines
2.2 KiB
Plaintext
// Dot-shorthand `.{ child = d }` for a struct whose first field is a protocol
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// value, used as the argument to `List(Container).append` from two distinct
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// container types. Exercises the cross-callsite path of dot-shorthand inference.
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#import "modules/std.sx";
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Drawable :: protocol {
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draw :: () -> s32;
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name :: () -> string;
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layout :: (x: s32) -> s32;
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handle :: (event: s32) -> bool;
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}
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Circle :: struct { radius: s32; }
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impl Drawable for Circle {
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draw :: (self: *Circle) -> s32 { self.radius; }
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name :: (self: *Circle) -> string { "circle"; }
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layout :: (self: *Circle, x: s32) -> s32 { x + self.radius; }
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handle :: (self: *Circle, event: s32) -> bool { event > 0; }
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}
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Square :: struct { side: s32; }
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impl Drawable for Square {
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draw :: (self: *Square) -> s32 { self.side * self.side; }
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name :: (self: *Square) -> string { "square"; }
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layout :: (self: *Square, x: s32) -> s32 { x + self.side; }
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handle :: (self: *Square, event: s32) -> bool { event > 1; }
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}
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Rect :: struct {
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x: f32;
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y: f32;
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w: f32;
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h: f32;
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zero :: () -> Rect { Rect.{ x = 0.0, y = 0.0, w = 0.0, h = 0.0 }; }
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}
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Container :: struct {
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child: Drawable;
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computed_frame: Rect = .zero();
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}
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// Two different structs, each with List(Container), both calling .append(.{...})
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// This mirrors VStack/HStack in the game.
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StackA :: struct {
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children: List(Container);
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add :: (self: *StackA, d: Drawable) {
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// BUG: `.{ child = d }` causes LLVM error when 2+ structs do this
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self.children.append(.{ child = d });
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}
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}
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StackB :: struct {
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children: List(Container);
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add :: (self: *StackB, d: Drawable) {
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// BUG: second struct doing `.{ child = d }` triggers the error
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self.children.append(.{ child = d });
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// FIX: explicit `Container.{ child = d }` works
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// self.children.append(Container.{ child = d });
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}
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}
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main :: () -> void {
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c := Circle.{ radius = 42 };
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s := Square.{ side = 5 };
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a : StackA = .{};
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a.add(c);
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print("StackA: draw={}\n", a.children.items[0].child.draw());
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b : StackB = .{};
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b.add(s);
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print("StackB: draw={}\n", b.children.items[0].child.draw());
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print("OK\n");
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}
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