From 7f3dcce048ede2dd8180966a5ca5b5a41b5b79dc Mon Sep 17 00:00:00 2001
From: Sijmen Schoon <me@sijmenschoon.nl>
Date: Fri, 22 May 2020 17:46:21 +0200
Subject: [PATCH] Initial commit

---
 .gitignore   |   1 +
 build.zig    |  14 ++
 src/main.zig |   2 +
 src/sdl.zig  | 398 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/ttf.zig  |  48 +++++++
 5 files changed, 463 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 build.zig
 create mode 100644 src/main.zig
 create mode 100644 src/sdl.zig
 create mode 100644 src/ttf.zig

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3cef7be
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+zig-cache/
diff --git a/build.zig b/build.zig
new file mode 100644
index 0000000..0a4f2dc
--- /dev/null
+++ b/build.zig
@@ -0,0 +1,14 @@
+const Builder = @import("std").build.Builder;
+
+pub fn build(b: *Builder) void {
+    const mode = b.standardReleaseOptions();
+    const lib = b.addStaticLibrary("zig-sdl", "src/main.zig");
+    lib.setBuildMode(mode);
+    lib.install();
+
+    var main_tests = b.addTest("src/main.zig");
+    main_tests.setBuildMode(mode);
+
+    const test_step = b.step("test", "Run library tests");
+    test_step.dependOn(&main_tests.step);
+}
diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..eb09ba6
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,2 @@
+pub const sdl = @import("sdl.zig");
+pub const ttf = @import("ttf.zig");
diff --git a/src/sdl.zig b/src/sdl.zig
new file mode 100644
index 0000000..794b9b6
--- /dev/null
+++ b/src/sdl.zig
@@ -0,0 +1,398 @@
+const std = @import("std");
+pub const c = @cImport(@cInclude("SDL2/SDL.h"));
+
+pub fn getError() ?[*:0]const u8 {
+    if (c.SDL_GetError()) |inner| {
+        return @ptrCast([*:0]const u8, inner);
+    }
+    return null;
+}
+
+pub const Color = struct {
+    r: u8,
+    g: u8,
+    b: u8,
+    a: u8 = c.SDL_ALPHA_OPAQUE,
+};
+
+pub const WindowPos = struct {
+    const Undefined: i32 = c.SDL_WINDOWPOS_UNDEFINED;
+    const Centered: i32 = c.SDL_WINDOWPOS_CENTERED;
+};
+
+pub const WindowFlags = struct {
+    pub const Fullscreen: i32 = c.SDL_WINDOW_FULLSCREEN;
+    pub const OpenGL: i32 = c.SDL_WINDOW_OPENGL;
+    pub const Shown: i32 = c.SDL_WINDOW_SHOWN;
+    pub const Hidden: i32 = c.SDL_WINDOW_HIDDEN;
+    pub const Borderless: i32 = c.SDL_WINDOW_BORDERLESS;
+    pub const Resizable: i32 = c.SDL_WINDOW_RESIZABLE;
+    pub const Minimized: i32 = c.SDL_WINDOW_MINIMIZED;
+    pub const InputGrabbed: i32 = c.SDL_WINDOW_INPUT_GRABBED;
+    pub const InputFocus: i32 = c.SDL_WINDOW_INPUT_FOCUS;
+    pub const MouseFocus: i32 = c.SDL_WINDOW_MOUSE_FOCUS;
+    pub const FullscreenDesktop: i32 = c.SDL_WINDOW_FULLSCREEN_DESKTOP;
+    pub const Foreign: i32 = c.SDL_WINDOW_FOREIGN;
+    pub const AllowHighDpi: i32 = c.SDL_WINDOW_ALLOW_HIGHDPI;
+    pub const MouseCapture: i32 = c.SDL_WINDOW_MOUSE_CAPTURE;
+    pub const AlwaysOnTop: i32 = c.SDL_WINDOW_ALWAYS_ON_TOP;
+    pub const SkipTaskbar: i32 = c.SDL_WINDOW_SKIP_TASKBAR;
+    pub const Utility: i32 = c.SDL_WINDOW_UTILITY;
+    pub const Tooltip: i32 = c.SDL_WINDOW_TOOLTIP;
+    pub const PopupMenu: i32 = c.SDL_WINDOW_POPUP_MENU;
+    pub const Vulkan: i32 = c.SDL_WINDOW_VULKAN;
+    pub const Metal: i32 = c.SDL_WINDOW_METAL;
+};
+
+pub const Window = struct {
+    window: *c.SDL_Window,
+
+    pub fn init(title: []const u8, w: i32, h: i32, flags: u32) !Window {
+        return Window.initWithPos(title, WindowPos.Undefined, WindowPos.Undefined, w, h, flags);
+    }
+
+    pub fn initWithPos(title: []const u8, x: i32, y: i32, w: i32, h: i32, flags: u32) !Window {
+        var title_ = @ptrCast([*c]const u8, title);
+        var window = c.SDL_CreateWindow(title_, x, y, w, h, flags) orelse {
+            std.debug.warn("Window.initWithPos: {}\n", .{getError()});
+            return error.SdlError;
+        };
+        return Window{ .window = window };
+    }
+
+    pub fn deinit(self: *Window) void {
+        c.SDL_DestroyWindow(self.window);
+    }
+
+    pub fn surface(self: Window) !Surface {
+        var c = c.SDL_GetWindowSurface(self.window) orelse {
+            std.debug.warn("Window.surface: {}\n", .{getError()});
+            return error.SdlError;
+        };
+        return Surface{ .surface = c };
+    }
+
+    pub fn updateSurface(self: Window) !void {
+        if (c.SDL_UpdateWindowSurface(self.window) != 0) {
+            std.debug.warn("Window.updateSurface: {}\n", .{getError()});
+            return error.SdlError;
+        }
+    }
+
+    pub fn createRenderer(self: Window, index: ?i32, flags: u32) !Renderer {
+        var renderer = c.SDL_CreateRenderer(self.window, index orelse -1, flags) orelse {
+            std.debug.warn("Window.createRenderer: {}\n", .{getError()});
+            return error.SdlError;
+        };
+        return Renderer{ .renderer = renderer };
+    }
+};
+
+pub const RendererFlags = struct {
+    pub const Software: u32 = c.SDL_RENDERER_SOFTWARE;
+    pub const Accelerated: u32 = c.SDL_RENDERER_ACCELERATED;
+    pub const PresentVSync: u32 = c.SDL_RENDERER_PRESENTVSYNC;
+    pub const TargetTexture: u32 = c.SDL_RENDERER_TARGETTEXTURE;
+};
+
+pub const Renderer = struct {
+    renderer: *c.SDL_Renderer,
+
+    pub fn deinit(self: Renderer) void {
+        c.SDL_DestroyRenderer(self.renderer);
+    }
+
+    pub fn createTextureFromSurface(self: Renderer, surface: Surface) !Texture {
+        var texture = c.SDL_CreateTextureFromSurface(self.renderer, surface.surface) orelse return error.SdlError;
+        return Texture{ .texture = texture };
+    }
+
+    pub fn clear(self: Renderer) !void {
+        if (c.SDL_RenderClear(self.renderer) != 0) {
+            return error.SdlError;
+        }
+    }
+
+    pub fn copy(self: Renderer, texture: Texture, srcrect: ?Rect, dstrect: ?Rect) !void {
+        var src = if (srcrect) |inner| &inner.c() else null;
+        var dst = if (dstrect) |inner| &inner.c() else null;
+        if (c.SDL_RenderCopy(self.renderer, texture.texture, src, dst) != 0) {
+            return error.SdlError;
+        }
+    }
+
+    pub fn present(self: Renderer) void {
+        c.SDL_RenderPresent(self.renderer);
+    }
+
+    pub fn setDrawColor(self: Renderer, color: Color) !void {
+        if (c.SDL_SetRenderDrawColor(self.renderer, color.r, color.g, color.b, color.a) != 0) {
+            return error.SdlError;
+        }
+    }
+
+    pub fn fillRect(self: Renderer, rect: ?Rect) !void {
+        var dst = if (rect) |inner| &inner.c() else null;
+        if (c.SDL_RenderFillRect(self.renderer, dst) != 0) {
+            return error.SdlError;
+        }
+    }
+};
+
+pub const Texture = struct {
+    texture: *c.SDL_Texture,
+
+    pub fn deinit(self: Texture) void {
+        c.SDL_DestroyTexture(self.texture);
+    }
+};
+
+pub const Surface = struct {
+    surface: *c.SDL_Surface,
+
+    pub fn initFromBmp(path: []const u8) !Surface {
+        var path_ = @ptrCast([*c]const u8, path);
+        var rw = c.SDL_RWFromFile(path_, "rb") orelse return error.SdlError;
+        var surface = c.SDL_LoadBMP_RW(rw, 1) orelse return error.SdlError;
+        return Surface{ .surface = surface };
+    }
+
+    pub fn deinit(self: Surface) void {
+        c.SDL_FreeSurface(self.surface);
+    }
+
+    pub fn fillRect(self: Surface, rect: [*c]const c.SDL_Rect, color: u32) !void {
+        if (c.SDL_FillRect(self.surface, rect, color) != 0) {
+            return error.SdlError;
+        }
+    }
+
+    pub fn format(self: Surface) PixelFormat {
+        return PixelFormat{ .pixelFormat = self.surface.*.format };
+    }
+
+    pub fn width(self: Surface) i32 {
+        return self.surface.w;
+    }
+
+    pub fn height(self: Surface) i32 {
+        return self.surface.h;
+    }
+};
+
+pub const PixelFormat = struct {
+    pixelFormat: *c.SDL_PixelFormat,
+
+    pub fn mapRgb(self: PixelFormat, r: u8, g: u8, b: u8) u32 {
+        return c.SDL_MapRGB(self.pixelFormat, r, g, b);
+    }
+};
+
+pub const Rect = struct {
+    x: i32 = 0,
+    y: i32 = 0,
+    w: i32 = 0,
+    h: i32 = 0,
+
+    fn c(self: Rect) c.SDL_Rect {
+        return .{
+            .x = self.x,
+            .y = self.y,
+            .w = self.w,
+            .h = self.h,
+        };
+    }
+};
+
+pub fn init() !void {
+    // TODO Make this configurable
+    if (c.SDL_Init(c.SDL_INIT_EVERYTHING) != 0) {
+        return error.SdlError;
+    }
+}
+
+pub fn quit() void {
+    c.SDL_Quit();
+}
+
+pub fn delay(ms: u32) void {
+    c.SDL_Delay(ms);
+}
+
+pub const EventType = enum(u32) {
+    FirstEvent = 0,
+    Quit = 0x100,
+    AppTerminating,
+    AppLowMemory,
+    AppWillEnterBackground,
+    AppDidEnterBackground,
+    AppWillEnterForeground,
+    AppDidEnterForeground,
+    LocaleChanged,
+
+    DisplayEvent = 0x150,
+
+    WindowEvent = 0x200,
+    SysWmEvent,
+
+    KeyDown = 0x300,
+    KeyUp,
+    TextEditing,
+    TextInput,
+    KeymapChanged,
+
+    MouseMotion = 0x400,
+    MouseButtonDown,
+    MouseButtonUp,
+    MouseWheel,
+
+    JoyAxisMotion = 0x600,
+    JoyBallMotion,
+    JoyHatMotion,
+    JoyButtonDown,
+    JoyButtonUp,
+    JoyDeviceAdded,
+    JoyDeviceRemoved,
+
+    ControllerAxisMotion = 0x650,
+    ControllerButtonDown,
+    ControllerButtonUp,
+    ControllerDeviceAdded,
+    ControllerDeviceRemoved,
+    ControllerDeviceRemapped,
+
+    FingerDown = 0x700,
+    FingerUp,
+    FingerMotion,
+
+    DollarGesture = 0x800,
+    DollarRecord,
+    MultiGesture,
+
+    ClipboardUpate = 0x900,
+
+    DropFile = 0x1000,
+    DropText,
+    DropBegin,
+    DropComplete,
+
+    AudioDeviceAdded = 0x1100,
+    AudioDeviceRemoved,
+
+    SensorUpdate = 0x1200,
+
+    RenderTargetsReset = 0x2000,
+    RenderDeviceReset,
+
+    UserEvent = 0x8000,
+
+    LastEvent = 0xFFFF,
+
+    _,
+};
+
+pub const MouseMotionEvent = struct {
+    timestamp: u32,
+    windowId: u32,
+    which: u32,
+    state: u32,
+    x: i32,
+    y: i32,
+    xrel: i32,
+    yrel: i32,
+};
+
+pub const Event = struct {
+    event: c.SDL_Event,
+
+    pub fn poll() ?Event {
+        var event = c.SDL_Event{ .type = 0 };
+        if (c.SDL_PollEvent(&event) == 0) {
+            return null;
+        }
+        return Event{ .event = event };
+    }
+
+    pub fn type_(self: Event) EventType {
+        return @intToEnum(EventType, self.event.type);
+    }
+
+    pub fn mouseMotion(self: Event) ?MouseMotionEvent {
+        if (self.type_() != .MouseMotion) {
+            return null;
+        }
+
+        var inner = self.event.motion;
+        return MouseMotionEvent{
+            .timestamp = inner.timestamp,
+            .windowId = inner.windowID,
+            .which = inner.which,
+            .state = inner.state,
+            .x = inner.x,
+            .y = inner.y,
+            .xrel = inner.xrel,
+            .yrel = inner.yrel,
+        };
+    }
+};
+
+pub const SystemCursor = extern enum {
+    Arrow = c.SDL_SYSTEM_CURSOR_ARROW,
+    IBeam = c.SDL_SYSTEM_CURSOR_IBEAM,
+    Wait = c.SDL_SYSTEM_CURSOR_WAIT,
+    Crosshair = c.SDL_SYSTEM_CURSOR_CROSSHAIR,
+    WaitArrow = c.SDL_SYSTEM_CURSOR_WAITARROW,
+    SizeNwSe = c.SDL_SYSTEM_CURSOR_SIZENWSE,
+    SizeNeSw = c.SDL_SYSTEM_CURSOR_SIZENESW,
+    SizeWE = c.SDL_SYSTEM_CURSOR_SIZEWE,
+    SizeNS = c.SDL_SYSTEM_CURSOR_SIZENS,
+    SizeAll = c.SDL_SYSTEM_CURSOR_SIZEALL,
+    No = c.SDL_SYSTEM_CURSOR_NO,
+    Hand = c.SDL_SYSTEM_CURSOR_HAND,
+};
+
+pub const Cursor = struct {
+    cursor: *c.SDL_Cursor,
+
+    pub fn initFromSystemCursor(id: SystemCursor) !Cursor {
+        var cursor = c.SDL_CreateSystemCursor(@intToEnum(c.SDL_SystemCursor, @enumToInt(id))) orelse {
+            std.debug.warn("Window.initWithPos: {}\n", .{getError()});
+            return error.SdlError;
+        };
+        return Cursor{ .cursor = cursor };
+    }
+
+    pub fn deinit(self: Cursor) void {
+        c.SDL_FreeCursor(self.cursor);
+    }
+
+    pub fn activate(self: Cursor) void {
+        c.SDL_SetCursor(self.cursor);
+    }
+};
+
+pub const PerformanceCounter = struct {
+    counter: u64,
+
+    pub fn init(counter: u64) PerformanceCounter {
+        return PerformanceCounter{ .counter = counter };
+    }
+
+    pub fn now() PerformanceCounter {
+        return PerformanceCounter{ .counter = c.SDL_GetPerformanceCounter() };
+    }
+
+    pub fn elapsed(self: PerformanceCounter) PerformanceCounter {
+        return PerformanceCounter{
+            .counter = c.SDL_GetPerformanceCounter() - self.counter,
+        };
+    }
+
+    pub fn frequency() u64 {
+        return c.SDL_GetPerformanceFrequency();
+    }
+
+    pub fn ms(self: PerformanceCounter) f64 {
+        return @intToFloat(f64, self.counter) * 1000 / @intToFloat(f64, PerformanceCounter.frequency());
+    }
+};
diff --git a/src/ttf.zig b/src/ttf.zig
new file mode 100644
index 0000000..86cf83b
--- /dev/null
+++ b/src/ttf.zig
@@ -0,0 +1,48 @@
+const std = @import("std");
+const sdl = @import("sdl.zig");
+pub const c = @cImport(@cInclude("SDL2/SDL_ttf.h"));
+
+pub fn init() !void {
+    if (c.TTF_Init() == -1) {
+        return error.SdlTtfError;
+    }
+}
+
+pub fn quit() void {
+    c.TTF_Quit();
+}
+
+pub fn getError() ?[*:0]const u8 {
+    if (c.TTF_GetError()) |inner| {
+        return @ptrCast([*:0]const u8, inner);
+    }
+    return null;
+}
+
+pub const Font = struct {
+    font: *c.TTF_Font,
+
+    pub fn init(path: []const u8, size: i32) !Font {
+        var path_ = @ptrCast([*c]const u8, path);
+        if (c.TTF_OpenFont(path_, size)) |inner| {
+            return Font{ .font = inner };
+        } else {
+            std.debug.warn("Font.init: {}\n", .{getError()});
+            return error.SdlTtfError;
+        }
+    }
+
+    pub fn deinit(self: Font) void {
+        c.TTF_CloseFont(self.font);
+    }
+
+    pub fn renderBlended(self: Font, text: []const u8, color: sdl.Color) !sdl.Surface {
+        var cText = @ptrCast([*c]const u8, text);
+        if (c.TTF_RenderUTF8_Blended(self.font, cText, @bitCast(c.SDL_Color, color))) |surface| {
+            return sdl.Surface{ .surface = @ptrCast(*sdl.c.SDL_Surface, surface) };
+        } else {
+            std.debug.warn("Font.renderBlended: {}\n", .{getError()});
+            return error.SdlTtfError;
+        }
+    }
+};