add vanilla DOM web backend

1 files changed, 30 insertions, 0 deletions

diff --git a/src/web/zstbi.zig b/src/web/zstbi.zig
new file mode 100644
index 00000000..76b144f7
--- /dev/null
+++ b/src/web/zstbi.zig
@@ -0,0 +1,30 @@
+//! Freestanding image-decoder shim.
+//!
+//! The browser core has no libc or C allocator ABI. Image bytes still survive
+//! dumps, but decoding belongs in the JavaScript IO layer rather than pulling
+//! stb_image and an Emscripten runtime into the state machine.
+
+const std = @import("std");
+
+pub fn init(_: std.Io, _: std.mem.Allocator) void {}
+pub fn deinit() void {}
+
+pub const Image = struct {
+    data: []u8 = &.{},
+    width: u32 = 0,
+    height: u32 = 0,
+    num_components: u32 = 4,
+    bytes_per_component: u32 = 1,
+    bytes_per_row: u32 = 0,
+    is_hdr: bool = false,
+
+    pub fn loadFromMemory(_: []const u8, _: u32) !Image {
+        return error.ImageDecodeUnavailable;
+    }
+
+    pub fn resize(_: *const Image, _: u32, _: u32) Image {
+        return .{};
+    }
+
+    pub fn deinit(_: *Image) void {}
+};