Zig 0.14 => Zig 0.15, STB Image => SDL3 Image

build.zig

@@ -6,6 +6,10 @@ const SHADERS: []const []const u8 = &.{
     "data/shaders/basic.vert",
     "data/shaders/basic.frag",
 };
+const SDL_LIBS: []const []const u8 = &.{
+    "SDL3",
+    "SDL3_image",
+};
 
 pub fn build(b: *Build) void {
     const target = b.standardTargetOptions(.{});
@@ -56,16 +60,16 @@ fn stepBuildClient(
 ) *Build.Step.Compile {
     const exe = b.addExecutable(.{
         .name = "tabletop_client",
+        .root_module = b.createModule(.{
             .root_source_file = b.path("src/client.zig"),
             .target = target,
             .optimize = optimize,
+        }),
     });
 
     exe.root_module.addImport("sdl", sdl_module);
     exe.step.dependOn(sdl_step);
 
-    exe.addIncludePath(b.path("lib/clibs"));
-
     return exe;
 }
 
@@ -76,9 +80,11 @@ fn stepBuildServer(
 ) *Build.Step.Compile {
     const exe = b.addExecutable(.{
         .name = "tabletop_server",
+        .root_module = b.createModule(.{
             .root_source_file = b.path("src/server.zig"),
             .target = target,
             .optimize = optimize,
+        }),
     });
 
     return exe;
@@ -93,16 +99,16 @@ fn stepBuildOffline(
 ) *Build.Step.Compile {
     const exe = b.addExecutable(.{
         .name = "tabletop",
+        .root_module = b.createModule(.{
             .root_source_file = b.path("src/offline.zig"),
             .target = target,
             .optimize = optimize,
+        }),
     });
 
     exe.root_module.addImport("sdl", sdl_module);
     exe.step.dependOn(sdl_step);
 
-    exe.addIncludePath(b.path("lib/clibs"));
-
     return exe;
 }
 
@@ -112,11 +118,15 @@ fn stepBuildSdlTranslator(
 ) *Build.Step.Compile {
     const sdl_translator = b.addExecutable(.{
         .name = "sdl_header_translator",
+        .root_module = b.createModule(.{
             .root_source_file = b.path("utils/sdl_translator.zig"),
             .target = target,
             .optimize = .Debug,
+        }),
     });
-    sdl_translator.linkSystemLibrary("SDL3");
+    for (SDL_LIBS) |lib| {
+        sdl_translator.linkSystemLibrary(lib);
+    }
     return sdl_translator;
 }
 
@@ -138,20 +148,25 @@ fn stepSdlModule(
     target: Build.ResolvedTarget,
     optimize: std.builtin.OptimizeMode,
 ) struct { *Build.Module, *Build.Step } {
-    const sdl_module = b.addModule("sdl", .{
+    const translate_sdl_step, const sdl_rename = stepTranslateSdl(b, target);
-        .root_source_file = b.path("lib/sdl.zig"),
+
+    const translate_c = b.addTranslateC(.{
+        .root_source_file = b.path("lib/sdl.h"),
         .link_libc = true,
         .target = target,
         .optimize = optimize,
     });
-    sdl_module.linkSystemLibrary("SDL3", .{});
+    translate_c.addIncludePath(sdl_rename.dirname());
+    const translate_module = translate_c.createModule();
+    for (SDL_LIBS) |lib| {
+        translate_module.linkSystemLibrary(lib, .{ .needed = true });
+    }
 
-    const translate_step, const sdl_rename = stepTranslateSdl(b, target);
+    translate_c.step.dependOn(translate_sdl_step);
-    sdl_module.addIncludePath(sdl_rename.dirname());
 
     return .{
-        sdl_module,
+        translate_module,
-        translate_step,
+        &translate_c.step,
     };
 }
 

lib/sdl.h

@@ -0,0 +1,3 @@
+#include "SDL3/SDL.h"
+#include "SDL3_image/SDL_image.h"
+#include "sdl_rename.h"

lib/sdl.zig

@@ -1,4 +0,0 @@
-pub usingnamespace @cImport({
-    @cInclude("SDL3/SDL.h");
-    @cInclude("sdl_rename.h");
-});

src/assets.zig

@@ -56,6 +56,7 @@ pub const LoadError = error{
     ParsingError,
     SdlError,
     FileTooBig,
+    UnsupportedAsset,
 } || std.mem.Allocator.Error || std.fs.File.OpenError || std.fs.File.ReadError || std.json.ParseError(std.json.Scanner);
 
 pub const AssetType = enum {
@@ -123,7 +124,7 @@ pub fn AssetContainer(comptime T: type) type {
                         self.last_state = self.asset_pointer.state;
                     }
                     if (self.last_state == .loaded) {
-                        self.data_pointer = @alignCast(@ptrCast(self.asset_pointer.data));
+                        self.data_pointer = @ptrCast(@alignCast(self.asset_pointer.data));
                         return self.data_pointer;
                     } else return null;
                 },
@@ -150,7 +151,7 @@ pub fn AssetContainer(comptime T: type) type {
                         self.last_state = self.asset_pointer.state;
                     }
                     if (self.last_state == .loaded) {
-                        self.data_pointer = @alignCast(@ptrCast(self.asset_pointer.data));
+                        self.data_pointer = @ptrCast(@alignCast(self.asset_pointer.data));
                     }
                     continue :sw self.last_state;
                 },
@@ -298,8 +299,8 @@ fn makeLoader(comptime T: type, comptime func: *const fn ([]const u8, std.mem.Al
 fn makeUnloader(comptime T: type, comptime func: *const fn (T, std.mem.Allocator) void) *const fn (*AssetCell, std.mem.Allocator) void {
     const Container = struct {
         pub fn unloader(cell: *AssetCell, alloc: std.mem.Allocator) void {
-            func(@as(*T, @alignCast(@ptrCast(cell.data))).*, alloc);
+            func(@as(*T, @ptrCast(@alignCast(cell.data))).*, alloc);
-            alloc.destroy(@as(*T, @alignCast(@ptrCast(cell.data))));
+            alloc.destroy(@as(*T, @ptrCast(@alignCast(cell.data))));
         }
     };
     return Container.unloader;

src/assets/texture.zig

@@ -1,7 +1,6 @@
 const std = @import("std");
 const sdl = @import("sdl");
 const err = @import("../error.zig");
-const c = @import("../c.zig");
 const Assets = @import("../assets.zig");
 const Graphics = @import("../graphics.zig");
 
@@ -14,20 +13,15 @@ pub fn load(path: []const u8, alloc: std.mem.Allocator) Assets.LoadError!@This()
     defer Assets.free(file);
     const data = (file.getSync() catch return error.DependencyError).bytes;
 
-    var width: u32 = undefined;
+    const image: *sdl.Surface = @ptrCast(sdl.IMG_Load_IO(sdl.IOFromConstMem(data.ptr, data.len), true) orelse return error.ParsingError);
-    var height: u32 = undefined;
+    defer sdl.DestroySurface(image);
-    var channels: u32 = undefined;
+    const format = image.format;
-    const image = c.stbi_load_from_memory(
+
-        @ptrCast(data),
+    const width: u32 = @intCast(image.w);
-        @intCast(data.len),
+    const height: u32 = @intCast(image.h);
-        @ptrCast(&width),
+    const channels: u32 = 4;
-        @ptrCast(&height),
+
-        @ptrCast(&channels),
+    const image_slice = @as([*]u8, @ptrCast(image.pixels))[0..@intCast(width * height * channels)];
-        4,
-    );
-    if (image == null) return error.ParsingError;
-    defer c.stbi_image_free(image);
-    const image_slice = image[0..@intCast(width * height * channels)];
 
     if (width > 8192 or height > 8192) return error.FileTooBig;
 
@@ -63,6 +57,43 @@ pub fn load(path: []const u8, alloc: std.mem.Allocator) Assets.LoadError!@This()
             defer sdl.EndGPUCopyPass(copy_pass);
 
             const map: [*]u8 = @ptrCast(sdl.MapGPUTransferBuffer(Graphics.device, transfer_buffer, false) orelse err.sdl());
+            var pixel: u32 = rows_uploaded * width * bytes_per_pixel;
+            var mapped: u32 = 0;
+            while (pixel < (rows_uploaded + rows_to_upload) * width * bytes_per_pixel) {
+                defer pixel += bytes_per_pixel;
+                defer mapped += bytes_per_pixel;
+                switch (format) {
+                    // Convert to RGBA8888
+                    sdl.PIXELFORMAT_ABGR8888 => {
+                        map[mapped + 0] = image_slice[pixel + 3];
+                        map[mapped + 1] = image_slice[pixel + 2];
+                        map[mapped + 2] = image_slice[pixel + 1];
+                        map[mapped + 3] = image_slice[pixel + 0];
+                    },
+                    sdl.PIXELFORMAT_ARGB8888 => {
+                        map[mapped + 0] = image_slice[pixel + 1];
+                        map[mapped + 1] = image_slice[pixel + 2];
+                        map[mapped + 2] = image_slice[pixel + 3];
+                        map[mapped + 3] = image_slice[pixel + 0];
+                    },
+                    sdl.PIXELFORMAT_RGBA8888 => {
+                        map[mapped + 0] = image_slice[pixel + 0];
+                        map[mapped + 1] = image_slice[pixel + 1];
+                        map[mapped + 2] = image_slice[pixel + 2];
+                        map[mapped + 3] = image_slice[pixel + 3];
+                    },
+                    sdl.PIXELFORMAT_BGRA8888 => {
+                        map[mapped + 0] = image_slice[pixel + 2];
+                        map[mapped + 1] = image_slice[pixel + 1];
+                        map[mapped + 2] = image_slice[pixel + 0];
+                        map[mapped + 3] = image_slice[pixel + 3];
+                    },
+                    else => {
+                        sdl.UnmapGPUTransferBuffer(Graphics.device, transfer_buffer);
+                        return error.UnsupportedAsset;
+                    },
+                }
+            }
             @memcpy(map, image_slice[(rows_uploaded * width * bytes_per_pixel)..((rows_uploaded + rows_to_upload) * width * bytes_per_pixel)]);
             sdl.UnmapGPUTransferBuffer(Graphics.device, transfer_buffer);
 

src/c.zig

@@ -1,8 +0,0 @@
-pub usingnamespace @cImport({
-    @cDefine("STBI_NO_GIF", "1");
-    @cDefine("STBI_NO_JPEG", "1");
-    @cDefine("STBI_NO_HDR", "1");
-    @cDefine("STBI_NO_TGA", "1");
-    @cDefine("STB_IMAGE_IMPLEMENTATION", "1");
-    @cInclude("stb_image.h");
-});

src/error.zig

@@ -14,7 +14,3 @@ const FileError = std.mem.Allocator.Error || std.fs.File.OpenError || std.fs.Fil
 pub fn file(err: FileError, path: []const u8) noreturn {
     std.debug.panic("Error while reading \"{s}\": {any}", .{ path, err });
 }
-
-pub fn stbi() noreturn {
-    std.debug.panic("STBI error!\n", .{});
-}

src/graphics.zig

@@ -282,7 +282,7 @@ fn loadShader(path: []const u8, info: sdl.GPUShaderCreateInfo) *sdl.GPUShader {
     const file = std.fs.cwd().openFile(path, .{}) catch |e| err.file(e, path);
     defer file.close();
 
-    const code = file.readToEndAllocOptions(std.heap.c_allocator, std.math.maxInt(usize), null, 1, 0) catch |e| err.file(e, path);
+    const code = file.readToEndAllocOptions(std.heap.c_allocator, std.math.maxInt(usize), null, .@"1", 0) catch |e| err.file(e, path);
     defer std.heap.c_allocator.free(code);
 
     var updated_info = info;

utils/sdl_translator.zig

@@ -1,6 +1,7 @@
 const std = @import("std");
 const sdl = @cImport({
     @cInclude("SDL3/SDL.h");
+    @cInclude("SDL3_image/SDL_image.h");
 });
 
 const PREFIX = "SDL_";
@@ -23,12 +24,8 @@ pub fn main() !void {
         try std.fs.cwd().createFile(output, .{});
     defer file.close();
 
-    const writer = file.writer();
+    var writer_buffer: [4096]u8 = undefined;
-
+    var writer = file.writer(&writer_buffer);
-    const stdout = std.io.getStdOut();
-    defer stdout.close();
-
-    const out = stdout.writer();
 
     var renamed_count: usize = 0;
     for (@typeInfo(sdl).@"struct".decls) |decl| {
@@ -36,7 +33,7 @@ pub fn main() !void {
 
         const new_name: []const u8 = decl.name[PREFIX.len..];
 
-        try writer.print(
+        try writer.interface.print(
             \\#define {1s} {0s}
             \\
         , .{ decl.name, new_name });
@@ -45,5 +42,4 @@ pub fn main() !void {
     if (renamed_count == 0) {
         @panic("No SDL definitions renamed");
     }
-    try out.print("[SDL Translator] {} SDL definitions renamed\n", .{renamed_count});
 }