wip zig orca sample

samples/calc-zig/.gitignore

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+Calc
+zig-out
+zig-cache
+profile.dtrace
+profile.spall

samples/calc-zig/build.zig

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+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    const optimize = b.standardOptimizeOption(.{});
+
+    // builds the wasm module out of the orca C sources and main.zig
+    const lib = b.addSharedLibrary(.{
+        .name = "module",
+        .root_source_file = .{ .path = "src/main.zig" },
+        .target = std.zig.CrossTarget{
+            .cpu_arch = .wasm32,
+            .os_tag = .freestanding,
+        },
+        .optimize = optimize,
+    });
+    lib.rdynamic = true;
+
+    // const orca_sources = [_][]const u8{"../../src/orca.c"}; //, "../../src/libc-shim/src/*.c"
+    const orca_sources = [_][]const u8{ "../../src/orca.c", "../../src/libc-shim/src/string.c" };
+    const orca_compile_opts = [_][]const u8{
+        "-D__ORCA__",
+        "--no-standard-libraries",
+        "-fno-builtin",
+        "-I../../src",
+        "-I../../src/libc-shim/include",
+        "-I../../ext",
+        "-Wl,--export-all",
+        "-g",
+    };
+
+    // -isystem ..\..\src\libc-shim\include ^
+    // -I..\..\ext -I ..\..\src
+
+    lib.addIncludePath(.{ .path = "../../src" });
+    lib.addIncludePath(.{ .path = "../../src/libc-shim/include" });
+    lib.addIncludePath(.{ .path = "../../ext" });
+    lib.addCSourceFiles(&orca_sources, &orca_compile_opts);
+
+    const orca_module: *std.Build.Module = b.createModule(.{
+        .source_file = .{ .path = "../../src/orca.zig" },
+    });
+    lib.addModule("orca", orca_module);
+
+    // copies the wasm module into zig-out/lib
+    b.installArtifact(lib);
+
+    // Runs the orca build command
+    const bundle_cmd_str = [_][]const u8{ "orca", "bundle", "--orca-dir", "../..", "--name", "Calc", "--icon", "icon.png", "--resource-dir", "data", "zig-out/lib/module.wasm" };
+    var bundle_cmd = b.addSystemCommand(&bundle_cmd_str);
+    bundle_cmd.step.dependOn(b.getInstallStep());
+
+    const bundle_step = b.step("bundle", "Runs the orca toolchain to bundle the wasm module into an orca app.");
+    bundle_step.dependOn(&bundle_cmd.step);
+}

samples/calc-zig/src/main.c

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+#include <math.h>
+
+#include <orca.h>
+
+#define ARRAYSIZE(array) (sizeof(array) / sizeof(array[0]))
+
+oc_vec2 frameSize = { 100, 100 };
+
+oc_surface surface;
+oc_canvas canvas;
+oc_font font;
+
+f64 lastSeconds = 0;
+
+oc_mat2x3 mat_rotation(f32 radians);
+oc_mat2x3 mat_translation(f32 x, f32 y);
+oc_mat2x3 mat_transform(f32 x, f32 y, f32 radians);
+f32 minf(f32 a, f32 b);
+
+ORCA_EXPORT void oc_on_init(void)
+{
+    oc_window_set_title(OC_STR8("clock"));
+    oc_runtime_window_set_size((oc_vec2){ .x = 400, .y = 400 });
+
+    surface = oc_surface_canvas();
+    canvas = oc_canvas_create();
+
+    {
+        oc_str8 filename = OC_STR8("/segoeui.ttf");
+        oc_file file = oc_file_open(filename, OC_FILE_ACCESS_READ, 0);
+        if(oc_file_last_error(file) != OC_IO_OK)
+        {
+            oc_log_error("Couldn't open file %s\n", oc_str8_to_cstring(oc_scratch(), filename));
+        }
+        u64 size = oc_file_size(file);
+        char* buffer = oc_arena_push(oc_scratch(), size);
+        oc_file_read(file, size, buffer);
+        oc_file_close(file);
+
+        oc_unicode_range ranges[5] = { OC_UNICODE_BASIC_LATIN,
+                                       OC_UNICODE_C1_CONTROLS_AND_LATIN_1_SUPPLEMENT,
+                                       OC_UNICODE_LATIN_EXTENDED_A,
+                                       OC_UNICODE_LATIN_EXTENDED_B,
+                                       OC_UNICODE_SPECIALS };
+        font = oc_font_create_from_memory(oc_str8_from_buffer(size, buffer), 5, ranges);
+    }
+
+    oc_arena_clear(oc_scratch());
+}
+
+ORCA_EXPORT void oc_on_resize(u32 width, u32 height)
+{
+    frameSize.x = width;
+    frameSize.y = height;
+}
+
+ORCA_EXPORT void oc_on_frame_refresh(void)
+{
+    const oc_str8 clock_number_strings[] = {
+        OC_STR8("12"),
+        OC_STR8("1"),
+        OC_STR8("2"),
+        OC_STR8("3"),
+        OC_STR8("4"),
+        OC_STR8("5"),
+        OC_STR8("6"),
+        OC_STR8("7"),
+        OC_STR8("8"),
+        OC_STR8("9"),
+        OC_STR8("10"),
+        OC_STR8("11"),
+    };
+
+    oc_canvas_set_current(canvas);
+    oc_surface_select(surface);
+    oc_set_color_rgba(.05, .05, .05, 1);
+    oc_clear();
+
+    const f64 timestampSecs = oc_clock_time(OC_CLOCK_DATE);
+    const f64 secs = fmod(timestampSecs, 60);
+    const f64 minutes = fmod(timestampSecs, 60 * 60) / 60;
+    const f64 hours = fmod(timestampSecs, 60 * 60 * 24) / (60 * 60);
+    const f64 hoursAs12Format = fmod(hours, 12.0);
+
+    if(lastSeconds != floor(secs))
+    {
+        lastSeconds = floor(secs);
+        oc_log_info("current time: %.0f:%.0f:%.0f", floor(hours), floor(minutes), floor(secs));
+    }
+
+    const f32 secondsRotation = (M_PI * 2) * (secs / 60.0) - (M_PI / 2);
+    const f32 minutesRotation = (M_PI * 2) * (minutes / 60.0) - (M_PI / 2);
+    const f32 hoursRotation = (M_PI * 2) * (hoursAs12Format / 12.0) - (M_PI / 2);
+
+    const f32 centerX = frameSize.x / 2;
+    const f32 centerY = frameSize.y / 2;
+    const f32 clockRadius = minf(frameSize.x, frameSize.y) * 0.5f * 0.85f;
+
+    const f32 DEFAULT_CLOCK_RADIUS = 260;
+    const f32 uiScale = clockRadius / DEFAULT_CLOCK_RADIUS;
+
+    const f32 fontSize = 26 * uiScale;
+    oc_set_font(font);
+    oc_set_font_size(fontSize);
+
+    // clock backing
+    oc_set_color_rgba(1, 1, 1, 1);
+    oc_circle_fill(centerX, centerY, clockRadius);
+
+    // clock face
+    for(int i = 0; i < ARRAYSIZE(clock_number_strings); ++i)
+    {
+        const f32 rot = -i * ((M_PI * 2) / 12.0f) + (M_PI / 2);
+        const f32 sinRot = sinf(rot);
+        const f32 cosRot = cosf(rot);
+
+        oc_rect textRect = oc_text_bounding_box(font, fontSize, clock_number_strings[i]);
+        textRect.h -= 10 * uiScale; // oc_text_bounding_box height doesn't seem to be a tight fit around the glyph
+
+        const f32 x = cosRot * clockRadius * 0.8f - (textRect.w / 2) + centerX;
+        const f32 y = -sinRot * clockRadius * 0.8f + (textRect.h / 2) + centerY;
+
+        oc_set_color_rgba(0.2, 0.2, 0.2, 1);
+        oc_move_to(x, y);
+        oc_text_outlines(clock_number_strings[i]);
+        oc_fill();
+    }
+
+    oc_matrix_push(mat_transform(centerX, centerY, hoursRotation));
+    {
+        oc_set_color_rgba(.2, 0.2, 0.2, 1);
+        oc_rounded_rectangle_fill(0, -7.5 * uiScale, clockRadius * 0.5f, 15 * uiScale, 5 * uiScale);
+
+        oc_matrix_pop();
+    }
+
+    oc_matrix_push(mat_transform(centerX, centerY, minutesRotation));
+    {
+        oc_set_color_rgba(.2, 0.2, 0.2, 1);
+        oc_rounded_rectangle_fill(0, -5 * uiScale, clockRadius * 0.7f, 10 * uiScale, 5 * uiScale);
+
+        oc_matrix_pop();
+    }
+
+    oc_matrix_push(mat_transform(centerX, centerY, secondsRotation));
+    {
+        oc_set_color_rgba(1, 0.2, 0.2, 1);
+        oc_rounded_rectangle_fill(0, -2.5 * uiScale, clockRadius * 0.8f, 5 * uiScale, 5 * uiScale);
+
+        oc_matrix_pop();
+    }
+
+    oc_set_color_rgba(.2, 0.2, 0.2, 1);
+    oc_circle_fill(centerX, centerY, 10 * uiScale);
+
+    oc_render(surface, canvas);
+    oc_surface_present(surface);
+}
+
+oc_mat2x3 mat_rotation(f32 radians)
+{
+    const f32 sinRot = sinf(radians);
+    const f32 cosRot = cosf(radians);
+    oc_mat2x3 rot = {
+        cosRot, -sinRot, 0,
+        sinRot, cosRot, 0
+    };
+    return rot;
+}
+
+oc_mat2x3 mat_translation(f32 x, f32 y)
+{
+    oc_mat2x3 translation = {
+        1, 0, x,
+        0, 1, y
+    };
+    return translation;
+}
+
+oc_mat2x3 mat_transform(f32 x, f32 y, f32 radians)
+{
+    oc_mat2x3 rotation = mat_rotation(radians);
+    oc_mat2x3 translation = mat_translation(x, y);
+    return oc_mat2x3_mul_m(translation, rotation);
+}
+
+f32 minf(f32 a, f32 b)
+{
+    return (a < b) ? a : b;
+}

samples/calc-zig/src/main.zig

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+const std = @import("std");
+const oc = @import("orca");
+
+export fn oc_on_init() void {
+    oc.log_info("oc_on_init!!!!\n");
+}
+
+export fn oc_on_frame_refresh() void {
+    oc.log_info("oc_on_frame_refresh!!!!\n");
+}

src/orca.zig

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+const c = @cImport({
+    @cDefine("__ORCA__", "");
+    @cInclude("orca.h");
+});
+
+// export var oc_rawEvent: c.oc_event = c.oc_rawEvent;
+
+pub fn log_info(fmt: []const u8) void {
+    c.oc_log_ext(c.OC_LOG_LEVEL_INFO, "UnknownFunc", "UnknownFile", 0, fmt.ptr);
+}
+
+// ORCA_API void oc_log_ext(oc_log_level level,
+//                          const char* function,
+//                          const char* file,
+//                          int line,
+//                          const char* fmt,
+//                          ...);