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update zig example

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This commit is contained in:
Dennis Ranke
2023-04-08 15:10:09 +02:00
parent d1b6fa36e8
commit 1a06ebbc95
2 changed files with 11 additions and 19 deletions
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18
examples/zig/build.zig
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@@ -5,11 +5,7 @@ pub fn build(b: *std.build.Builder) void {
const lib = b.addSharedLibrary("cart", "main.zig", .unversioned);
lib.setBuildMode(mode);
lib.setTarget(.{
.cpu_arch = .wasm32,
.os_tag = .freestanding,
.cpu_features_add = std.Target.wasm.featureSet(&.{ .nontrapping_fptoint })
});
lib.setTarget(.{ .cpu_arch = .wasm32, .os_tag = .freestanding, .cpu_features_add = std.Target.wasm.featureSet(&.{.nontrapping_fptoint}) });
lib.import_memory = true;
lib.initial_memory = 262144;
lib.max_memory = 262144;
@@ -18,19 +14,13 @@ pub fn build(b: *std.build.Builder) void {
lib.install();
if (lib.install_step) |install_step| {
const run_filter_exports = b.addSystemCommand(&[_][]const u8{
"uw8", "filter-exports", "zig-out/lib/cart.wasm", "zig-out/lib/cart-filtered.wasm"
});
const run_filter_exports = b.addSystemCommand(&[_][]const u8{ "uw8", "filter-exports", "zig-out/lib/cart.wasm", "zig-out/lib/cart-filtered.wasm" });
run_filter_exports.step.dependOn(&install_step.step);
const run_wasm_opt = b.addSystemCommand(&[_][]const u8{
"wasm-opt", "-Oz", "-o", "zig-out/cart.wasm", "zig-out/lib/cart-filtered.wasm"
});
const run_wasm_opt = b.addSystemCommand(&[_][]const u8{ "wasm-opt", "--enable-nontrapping-float-to-int", "-Oz", "-o", "zig-out/cart.wasm", "zig-out/lib/cart-filtered.wasm" });
run_wasm_opt.step.dependOn(&run_filter_exports.step);
const run_uw8_pack = b.addSystemCommand(&[_][]const u8{
"uw8", "pack", "-l", "9", "zig-out/cart.wasm", "zig-out/cart.uw8"
});
const run_uw8_pack = b.addSystemCommand(&[_][]const u8{ "uw8", "pack", "-l", "9", "zig-out/cart.wasm", "zig-out/cart.uw8" });
run_uw8_pack.step.dependOn(&run_wasm_opt.step);
const make_opt = b.step("make_opt", "make size optimized cart");

12
examples/zig/main.zig
View File

@@ -1,11 +1,11 @@
extern fn atan2(x: f32, y: f32) f32;
extern fn time() f32;
pub const FRAMEBUFFER: *[320*240]u8 = @intToPtr(*[320*240]u8, 120);
pub const FRAMEBUFFER: *[320 * 240]u8 = @intToPtr(*[320 * 240]u8, 120);
export fn upd() void {
var i: u32 = 0;
while(true) {
while (true) {
var t = time() * 63.0;
var x = @intToFloat(f32, (@intCast(i32, i % 320) - 160));
var y = @intToFloat(f32, (@intCast(i32, i / 320) - 120));
@@ -13,8 +13,10 @@ export fn upd() void {
var u = atan2(x, y) * 512.0 / 3.141;
var c = @intCast(u8, (@floatToInt(i32, d + t * 2.0) ^ @floatToInt(i32, u + t)) & 255) >> 4;
FRAMEBUFFER[@as(usize, i)] = c;
FRAMEBUFFER[i] = c;
i += 1;
if(i >= 320*240) { break; }
if (i >= 320 * 240) {
break;
}
}
}
}