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retro.zig
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// MIT License
//
// Copyright © 2023 anyputer and The RetroArch team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// TODO: take a lot of things out of the env namespace. like it should be retro.FrameTimeCallback not retro.env.FrameTimeCallback
const std = @import("std");
pub const allocator = if (@import("builtin").target.isWasm()) w: {
break :w std.heap.wasm_allocator;
} else if (@import("builtin").link_libc)
c: {
break :c std.heap.c_allocator;
} else {
@compileError("you must either link libc or target wasm to use retro.allocator");
};
pub const api_version = 1;
const retro_callconv = .C;
pub const Device = enum(c_int) {
none,
joypad, //= 1,
mouse,
keyboard,
lightgun,
analog,
pointer,
_,
// TODO: pub fn subclass
};
pub const Mouse = enum(c_int) {
x,
y,
left,
right,
wheelup,
wheeldown,
middle,
horiz_wheelup,
horiz_wheeldown,
button_4,
button_5,
_,
};
pub const Region = enum(c_int) {
ntsc,
pal,
_,
};
// TODO: RETRO_MEMORY_MASK?
pub const Memory = enum(c_int) {
save_ram,
rtc,
system_ram,
video_ram,
_,
};
pub const Rotation = enum(c_int) {
@"0",
@"90",
@"180",
@"270",
};
pub const PixelFormat = enum(c_int) {
zrgb1555,
xrgb8888,
rgb565,
_,
};
pub const Message = extern struct {
/// Message to be displayed.
msg: [*:0]const u8,
/// Duration in frames of message.
frames: c_uint,
};
pub const MessageTarget = enum(c_int) {
all,
osd,
log,
_,
};
pub const MessageType = enum(c_int) {
notification,
notification_alt,
status,
progress,
_,
};
pub const MessageExt = extern struct {
msg: [*:0]const u8,
duration: c_uint,
priority: c_uint,
level: env.log.Level,
target: MessageTarget,
type: MessageType,
progress: i8,
};
pub const SystemInfo = extern struct {
library_name: [*:0]const u8,
library_version: [*:0]const u8,
valid_extensions: ?[*:0]const u8 = null,
need_fullpath: bool = false,
block_extract: bool = false,
};
pub const GameInfoExt = extern struct {
full_path: ?[*:0]const u8,
archive_path: ?[*:0]const u8,
archive_file: ?[*:0]const u8,
dir: [*:0]const u8,
name: [*:0]const u8,
ext: [*:0]const u8,
meta: [*:0]const u8,
data: ?[*]const u8,
size: usize,
file_in_archive: bool,
persistent_data: bool,
};
pub const GameGeometry = extern struct {
base_width: c_uint,
base_height: c_uint,
max_width: c_uint,
max_height: c_uint,
aspect_ratio: f32 = 0,
};
pub const SystemTiming = extern struct {
fps: f64,
sample_rate: f64,
};
pub const SystemAvInfo = extern struct {
geometry: GameGeometry,
timing: SystemTiming,
};
pub const GameInfo = extern struct {
path: ?[*:0]const u8,
data: ?[*]const u8,
size: usize,
meta: ?[*:0]const u8 = "", // TODO: can this be optional?
pub fn dataSlice(info: @This()) ?[]const u8 {
return if (info.data) |ptr| ptr[0..info.size] else null;
}
};
pub const Zrgb1555 = packed struct(u16) {
b: u5 = 0,
g: u5 = 0,
r: u5 = 0,
_: u1 = 0,
};
pub const Xrgb8888 = packed struct(u32) {
b: u8 = 0,
g: u8 = 0,
r: u8 = 0,
x: u8 = 0,
// zig fmt: off
pub const red: @This() = @bitCast(@as(u32, 0x00_FF0000));
pub const green: @This() = @bitCast(@as(u32, 0x00_00FF00));
pub const blue: @This() = @bitCast(@as(u32, 0x00_0000FF));
pub const cyan: @This() = @bitCast(@as(u32, 0x00_00FFFF));
pub const magenta: @This() = @bitCast(@as(u32, 0x00_FF00FF));
pub const yellow: @This() = @bitCast(@as(u32, 0x00_FFFF00));
pub const black: @This() = .{};
pub const white: @This() = @bitCast(@as(u32, 0x00_FFFFFF));
// zig fmt: on
};
pub const Rgb565 = packed struct(u16) {
b: u5 = 0,
g: u6 = 0,
r: u5 = 0,
// TODO: are these consts defined correctly?
// zig fmt: off
pub const red: @This() = @bitCast(@as(u16, 0b11111_000000_00000));
pub const green: @This() = @bitCast(@as(u16, 0b00000_111111_00000));
pub const blue: @This() = @bitCast(@as(u16, 0b00000_000000_11111));
pub const cyan: @This() = @bitCast(@as(u16, 0b00000_111111_11111));
pub const magenta: @This() = @bitCast(@as(u16, 0b11111_000000_11111));
pub const yellow: @This() = @bitCast(@as(u16, 0b11111_111111_00000));
pub const black: @This() = .{};
pub const white: @This() = @bitCast(@as(u16, 0b11111_111111_11111));
// zig fmt: on
};
// TODO: consider moving hw, log, etc namespaces out
pub const env = struct {
pub const CallbackFn = fn (cmd: Command, data: ?*anyopaque) callconv(retro_callconv) bool;
pub const SetCallbackFn = fn (*const CallbackFn) callconv(retro_callconv) void;
pub const Command = enum(c_int) {
set_rotation = 1,
get_overscan,
get_can_dupe,
set_message = 6,
shutdown,
set_performance_level,
get_system_directory,
set_pixel_format,
set_input_descriptors,
set_keyboard_callback,
set_disk_control_interface,
set_hw_render,
get_variable,
set_variables,
get_variable_update,
set_support_no_game,
get_libretro_path,
set_frame_time_callback = 21,
set_audio_callback,
get_rumble_interface,
get_input_device_capabilities,
get_sensor_interface = 25 | experimental,
get_camera_interface = 26 | experimental,
get_log_interface = 27,
get_perf_interface,
get_location_interface,
get_core_assets_directory,
get_save_directory,
set_system_av_info,
set_proc_address_callback,
set_subsystem_info,
set_controller_info,
set_memory_maps = 36 | experimental,
set_geometry = 37,
get_username,
get_language,
get_current_software_framebuffer = 40 | experimental,
get_hw_render_interface = 41 | experimental,
set_support_achievements = 42 | experimental,
set_hw_render_context_negotiation_interface = 43 | experimental,
set_serialization_quirks = 44,
set_hw_shared_context = 44 | experimental,
get_vfs_interface = 45 | experimental,
get_led_interface = 46 | experimental,
get_audio_video_enable = 47 | experimental,
get_midi_interface = 48 | experimental,
get_fastforwarding = 49 | experimental,
get_target_refresh_rate = 50 | experimental,
get_input_bitmasks = 51 | experimental,
get_core_options_version = 52,
set_core_options,
set_core_options_intl,
set_core_options_display,
get_preferred_hw_render,
get_disk_control_interface_version,
set_disk_control_ext_interface,
get_message_interface_version,
set_message_ext,
get_input_max_users,
set_audio_buffer_status_callback,
set_minimum_audio_latency,
set_fastforwarding_override,
set_content_info_override,
get_game_info_ext,
set_core_options_v2,
set_core_options_v2_intl,
set_core_options_update_display_callback,
set_variable,
get_throttle_state = 71 | experimental,
get_savestate_context = 72 | experimental,
get_hw_render_context_negotiation_interface_support = 73 | experimental,
get_jit_capable = 74,
get_microphone_interface = 75 | experimental,
set_netpacket_interface = 76,
_,
// TODO: add more commands
// TODO: make these private or what?
pub const experimental = 0x10000;
pub const private = 0x10000;
//pub inline fn experimental(id: c_uint) @This() {
// return @This()(id | 0x10000);
//}
//pub inline fn private(id: c_uint) @This() {
// return @This()(id | 0x20000);
//}
};
fn dummyCallback(_: Command, _: ?*anyopaque) callconv(retro_callconv) bool {
@panic("environment callback hasn't been initialized");
}
pub var callback: *const CallbackFn = if (std.debug.runtime_safety) dummyCallback else undefined;
pub fn getOverscan() bool {
var use_overscan: bool = false;
_ = callback(.get_overscan, &use_overscan);
return use_overscan;
}
pub fn getCanDupe() bool {
var can_dupe: bool = false;
_ = callback(.get_can_dupe, &can_dupe);
return can_dupe;
}
pub fn setMessage(message: *const Message) bool {
return callback(.set_message, @constCast(message));
}
pub fn shutdown() bool {
return callback(.shutdown, null);
}
/// Exits the libretro core.
pub fn exit() noreturn {
if (shutdown()) unreachable else std.process.abort();
}
pub fn getSystemDir() ?[*:0]const u8 {
var dir: ?[*:0]const u8 = null;
_ = callback(.get_system_directory, @ptrCast(&dir));
return dir;
}
// TODO: *const PixelFormat?
pub fn setPixelFormat(format: PixelFormat) bool {
return callback(.set_pixel_format, @constCast(&format));
}
pub const Key = enum(c_int) {
unknown = 0,
first = 0,
backspace = 8,
tab = 9,
clear = 12,
@"return" = 13,
pause = 19,
escape = 27,
space = 32,
exclaim = 33,
quotedbl = 34,
hash = 35,
dollar = 36,
ampersand = 38,
quote = 39,
leftparen = 40,
rightparen = 41,
asterisk = 42,
plus = 43,
comma = 44,
minus = 45,
period = 46,
slash = 47,
@"0" = 48,
@"1" = 49,
@"2" = 50,
@"3" = 51,
@"4" = 52,
@"5" = 53,
@"6" = 54,
@"7" = 55,
@"8" = 56,
@"9" = 57,
colon = 58,
semicolon = 59,
less = 60,
equals = 61,
greater = 62,
question = 63,
at = 64,
leftbracket = 91,
backslash = 92,
rightbracket = 93,
caret = 94,
underscore = 95,
backquote = 96,
a = 97,
b = 98,
c = 99,
d = 100,
e = 101,
f = 102,
g = 103,
h = 104,
i = 105,
j = 106,
k = 107,
l = 108,
m = 109,
n = 110,
o = 111,
p = 112,
q = 113,
r = 114,
s = 115,
t = 116,
u = 117,
v = 118,
w = 119,
x = 120,
y = 121,
z = 122,
leftbrace = 123,
bar = 124,
rightbrace = 125,
tilde = 126,
delete = 127,
kp0 = 256,
kp1 = 257,
kp2 = 258,
kp3 = 259,
kp4 = 260,
kp5 = 261,
kp6 = 262,
kp7 = 263,
kp8 = 264,
kp9 = 265,
kp_period = 266,
kp_divide = 267,
kp_multiply = 268,
kp_minus = 269,
kp_plus = 270,
kp_enter = 271,
kp_equals = 272,
up = 273,
down = 274,
right = 275,
left = 276,
insert = 277,
home = 278,
end = 279,
pageup = 280,
pagedown = 281,
f1 = 282,
f2 = 283,
f3 = 284,
f4 = 285,
f5 = 286,
f6 = 287,
f7 = 288,
f8 = 289,
f9 = 290,
f10 = 291,
f11 = 292,
f12 = 293,
f13 = 294,
f14 = 295,
f15 = 296,
numlock = 300,
capslock = 301,
scrollock = 302,
rshift = 303,
lshift = 304,
rctrl = 305,
lctrl = 306,
ralt = 307,
lalt = 308,
rmeta = 309,
lmeta = 310,
lsuper = 311,
rsuper = 312,
mode = 313,
compose = 314,
help = 315,
print = 316,
sysreq = 317,
@"break" = 318,
menu = 319,
power = 320,
euro = 321,
undo = 322,
oem_102 = 323,
_,
};
pub const ProcAddress = *const fn () callconv(retro_callconv) void;
pub const hw = struct {
//pub const frame_buffer_valid: *const anyopaque = @ptrFromInt(std.math.maxInt(usize) - 1);
pub const frame_buffer_valid: *const anyopaque = @ptrFromInt(@as(usize, @bitCast(@as(isize, -1))));
pub const ContextResetFn = fn () callconv(retro_callconv) void;
pub const GetCurrentFramebufferFn = fn () callconv(retro_callconv) usize;
pub const GetProcAddressFn = fn (sym: [*:0]const u8) callconv(retro_callconv) ProcAddress;
pub const ContextType = enum(c_int) {
none,
opengl,
opengles2,
opengl_core,
opengles3,
opengles_version,
vulkan,
d3d11,
d3d10,
d3d12,
d3d9,
_,
};
pub const RenderCallback = extern struct {
context_type: ContextType,
contextReset: *const ContextResetFn,
getCurrentFramebuffer: *const GetCurrentFramebufferFn,
getProcAddress: *const GetProcAddressFn,
depth: bool = true, // obsolete
stencil: bool = false,
bottom_left_origin: bool,
version_major: c_uint = 0,
version_minor: c_uint = 0,
cache_context: bool = true,
contextDestroy: *const ContextResetFn,
debug_context: bool = @import("builtin").mode == .Debug,
};
pub fn setRenderCallback(cb: *RenderCallback) bool {
return callback(.set_hw_render, cb);
}
pub const RenderInterfaceBase = extern struct {
interface_type: Type,
interface_version: c_uint,
pub const Type = enum(c_int) {
vulkan,
d3d9,
d3d10,
d3d11,
d3d12,
gskit_ps2,
_,
};
};
pub const RenderContextNegotiationInterfaceBase = extern struct {
interface_type: Type,
interface_version: c_uint,
pub const Type = enum(c_int) {
vulkan,
_,
};
};
pub fn setRenderContextNegotiationInterface(interface: *const RenderContextNegotiationInterfaceBase) bool {
return callback(.set_hw_render_context_negotiation_interface, @constCast(interface));
}
// it is recommended to build RetroArch with Vulkan validation enabled for debugging
pub const vulkan = struct {
const root = @import("root");
// use Snektron's vulkan-zig or export everything yourself in this struct
const vk = root.vk;
pub const Image = extern struct {
image_view: vk.ImageView,
image_layout: vk.ImageLayout,
create_info: vk.ImageViewCreateInfo,
};
// TODO: should this be nullable?
pub const Handle = *opaque {};
pub const SetImageFn = fn (handle: Handle, image: *const Image, num_semaphores: u32, semaphores: ?[*]const vk.Semaphore, src_queue_family: u32) callconv(retro_callconv) void;
pub const GetSyncIndexFn = fn (handle: Handle) callconv(retro_callconv) u32;
pub const GetSyncIndexMaskFn = fn (handle: Handle) callconv(retro_callconv) u32;
pub const SetCommandBuffersFn = fn (handle: Handle, num_cmd: u32, cmd: [*]const vk.CommandBuffer) callconv(retro_callconv) void;
pub const WaitSyncIndexFn = fn (handle: Handle) callconv(retro_callconv) void;
pub const LockQueueFn = fn (handle: Handle) callconv(retro_callconv) void;
pub const UnlockQueueFn = fn (handle: Handle) callconv(retro_callconv) void;
pub const SetSignalSemaphoreFn = fn (handle: Handle) callconv(retro_callconv) void; // TODO: semaphore may be null
pub const GetApplicationInfoFn = fn () callconv(retro_callconv) *const vk.ApplicationInfo;
pub const Context = extern struct {
gpu: vk.PhysicalDevice,
device: vk.Device,
queue: vk.Queue,
queue_family_index: u32,
presentation_queue: vk.Queue,
presentation_queue_family_index: u32,
};
pub const CreateDeviceFn = fn (
context: *Context,
instance: vk.Instance,
gpu: vk.PhysicalDevice,
surface: vk.SurfaceKHR,
getInstanceProcAddr: vk.PfnGetInstanceProcAddr,
required_device_extensions: [*][*:0]const u8,
num_required_device_extensions: c_uint,
required_device_layers: [*][*:0]const u8,
num_required_device_layers: c_uint,
required_features: *const vk.PhysicalDeviceFeatures,
) callconv(retro_callconv) bool;
pub const DestroyDeviceFn = fn () callconv(retro_callconv) void;
pub const RenderContextNegotiationInterfaceV1 = extern struct {
interface_type: RenderContextNegotiationInterfaceBase.Type = .vulkan,
interface_version: c_uint = version,
getApplicationInfo: ?*const GetApplicationInfoFn = null,
createDevice: ?*const CreateDeviceFn = null,
destroyDevice: ?*const DestroyDeviceFn = null,
pub const version = 1;
};
pub const CreateInstanceWrapperFn = fn (handle: Handle, create_info: *const vk.InstanceCreateInfo) callconv(retro_callconv) vk.Instance;
pub const CreateInstanceFn = fn (
getInstanceProcAddr: vk.PfnGetInstanceProcAddr,
app: *const vk.ApplicationInfo,
createInstanceWrapper: *const CreateInstanceWrapperFn,
handle: Handle,
) callconv(retro_callconv) vk.Instance;
pub const CreateDeviceWrapperFn = fn (gpu: vk.PhysicalDevice, handle: Handle, create_info: *const vk.DeviceCreateInfo) callconv(retro_callconv) vk.Device;
pub const CreateDevice2Fn = fn (
context: *const Context,
instance: vk.Instance,
gpu: vk.PhysicalDevice,
surface: vk.SurfaceKHR,
getInstanceProcAddr: vk.PfnGetInstanceProcAddr,
createDeviceWrapper: *const CreateDeviceWrapperFn,
handle: Handle,
) callconv(retro_callconv) bool;
pub const RenderContextNegotiationInterfaceV2 = extern struct {
interface_type: RenderContextNegotiationInterfaceBase.Type = .vulkan,
interface_version: c_uint = version,
getApplicationInfo: ?*const GetApplicationInfoFn = null,
createDevice: ?*const CreateDeviceFn = null,
destroyDevice: ?*const DestroyDeviceFn = null,
createInstance: ?*const CreateInstanceFn = null,
createDevice2: ?*const CreateDevice2Fn = null,
pub const version = 2;
};
// TODO: if zig adds ranged integer types, it could benefit VK_NULL_HANDLE
// TODO: which fields should be nullable?
pub const RenderInterface = extern struct {
interface_type: RenderInterfaceBase.Type = .vulkan,
interface_version: c_uint = version,
handle: Handle,
instance: vk.Instance,
gpu: vk.PhysicalDevice,
device: vk.Device,
getDeviceProcAddr: vk.PfnGetDeviceProcAddr,
getInstanceProcAddr: vk.PfnGetInstanceProcAddr,
queue: vk.Queue,
queue_index: c_uint,
setImage: *const SetImageFn,
getSyncIndex: *const GetSyncIndexFn,
getSyncIndexMask: *const GetSyncIndexMaskFn,
setCommandBuffers: *const SetCommandBuffersFn,
waitSyncIndex: *const WaitSyncIndexFn,
lockQueue: *const LockQueueFn,
unlockQueue: *const UnlockQueueFn,
setSignalSemaphore: *const SetSignalSemaphoreFn,
pub const version = 5;
};
};
pub fn getRenderInterface(interface: **const RenderInterfaceBase) bool {
return callback(.get_hw_render_interface, @ptrCast(interface));
}
};
pub const Variable = extern struct {
key: ?[*:0]const u8 = null,
value: ?[*:0]const u8 = null,
};
pub fn getVariable(key: [*:0]const u8) ?[*:0]const u8 {
var variable: Variable = .{ .key = key, .value = null };
_ = callback(.get_variable, &variable);
return variable.value;
}
pub fn setVariables(vars: [*:.{}]const Variable) bool {
return callback(.set_variables, @constCast(vars));
}
pub fn getVariableUpdate() bool {
var var_update: bool = false;
_ = callback(.get_variable_update, &var_update);
return var_update;
}
pub fn setSupportNoGame(yes: bool) bool {
return callback(.set_support_no_game, @constCast(&yes));
}
pub const FrameTimeCallback = extern struct {
callback: *const Fn,
reference: i64,
pub const Fn = fn (usec: i64) callconv(retro_callconv) void;
};
pub const AudioCallback = extern struct {
callback: *const Fn,
setState: *const SetStateFn,
pub const Fn = fn () callconv(retro_callconv) void;
pub const SetStateFn = fn (enabled: bool) callconv(retro_callconv) void;
};
pub const log = struct {
pub const Level = enum(c_int) {
debug,
info,
warn,
@"error",
_,
pub fn fromStdLogLevel(comptime level: std.log.Level) @This() {
return comptime switch (level) {
.debug => .debug,
.info => .info,
.warn => .warn,
.err => .@"error",
};
}
};
pub const PrintfFn = fn (level: Level, fmt: [*:0]const u8, ...) callconv(retro_callconv) void;
pub const LogCallback = extern struct {
log: *const PrintfFn,
};
//extern fn vfprintf(stream: *std.c.FILE, format: [*:0]const u8, ap: std.builtin.VaList) c_int;
//extern const stderr: *std.c.FILE;
// TODO: why does this like to crash? try fixing it and see if it makes the binary size smaller
//pub export fn stderrFallback(_: Level, fmt: [*:0]const u8, ...) callconv(retro_callconv) void {
// var va_list = @cVaStart();
// _ = vfprintf(stderr, fmt, va_list);
// @cVaEnd(&va_list);
//}
//pub var logCallback: *const PrintfFn = stderrFallback;
pub var logCallback: ?*const PrintfFn = null;
pub fn basicImpl(
comptime level: std.log.Level,
comptime scope: @TypeOf(.enum_literal),
comptime fmt: []const u8,
args: anytype,
) void {
if (logCallback) |cb| {
const buf = std.fmt.allocPrintZ(allocator, fmt, args) catch return;
defer allocator.free(buf);
cb(Level.fromStdLogLevel(level), "%s\n", buf.ptr);
} else std.log.defaultLog(
level,
scope,
fmt,
args,
);
}
pub fn init() void {
_ = callback(.get_log_interface, @ptrCast(&logCallback));
}
//pub fn getLogger(cb: retro.EnvironmentFn) ?type {
// //const logger_available = cb(.GetLogInterface, &log_cb);
// //if (logger_available) std.log.level = .debug;
//
// return if (cb(.GetLogInterface, &log_cb)) std.log.scoped(.retro) else null;
//}
//pub fn initLogger(cb: retro.EnvironmentFn) bool {
// return (cb(.GetLogInterface, &log_cb));
//}
};
pub fn getUsername() ?[*:0]const u8 {
var name: ?[*:0]const u8 = null;
_ = callback(.get_username, @ptrCast(&name));
return name;
}
pub const Language = enum(c_int) {
english,
japanese,
french,
spanish,
german,
italian,
dutch,
portuguese_brazil,
portuguese_portugal,
russian,
korean,
chinese_traditional,
chinese_simplified,
esperanto,
polish,
vietnamese,
arabic,
greek,
turkish,
slovak,
persian,
hebrew,
asturian,
finnish,
indonesian,
swedish,
ukrainian,
czech,
catalan_valencia,
catalan,
british_english,
hungarian,
_,
pub const last = blk: {
const values = std.enums.values(@This());
break :blk @as(@This(), @enumFromInt(@intFromEnum(values[values.len - 1]) + 1));
};
};
pub fn getLanguage() ?Language {
var lang: Language = undefined;
return if (callback(.get_language, &lang)) lang else null;
}
pub const MemoryAccess = packed struct(c_uint) {
write: bool,
read: bool,
_: u30 = 0,
};
pub const MemoryType = packed struct(c_uint) {
cached: bool,
_: u31 = 0,
};
pub const Framebuffer = extern struct {
data: [*]u8,
width: c_uint,
height: c_uint,
pitch: usize,
format: PixelFormat,
access_flags: MemoryAccess,
memory_flags: MemoryType,
};
};
pub const video = struct {
pub const RefreshFn = fn (data: ?*const anyopaque, width: c_uint, height: c_uint, pitch: usize) callconv(retro_callconv) void;
pub const SetRefreshFn = fn (*const RefreshFn) callconv(retro_callconv) void;
fn dummyRefresh(_: ?*const anyopaque, _: c_uint, _: c_uint, _: usize) callconv(retro_callconv) void {
@panic("video refresh callback hasn't been initialized");
}
// TODO: safety
pub var refreshCb: *const RefreshFn = if (std.debug.runtime_safety) dummyRefresh else undefined;
pub fn refresh(data: *const anyopaque, width: c_uint, height: c_uint, pitch: usize) void {
refreshCb(data, width, height, pitch);
}
pub fn dupe(width: c_uint, height: c_uint) void {
// TODO: does width, height, pitch matter at all?
refreshCb(null, width, height, 0);
}
};
pub const audio = struct {
pub const SampleFn = fn (left: i16, right: i16) callconv(retro_callconv) void;
pub const SetSampleFn = fn (*const SampleFn) callconv(retro_callconv) void;
pub const SampleBatchFn = fn (data: [*]const i16, frames: usize) callconv(retro_callconv) usize;
pub const SetSampleBatchFn = fn (*const SampleBatchFn) callconv(retro_callconv) void;
fn dummySample(_: i16, _: i16) callconv(retro_callconv) void {
@panic("audio sample callback hasn't been initialized");
}
fn dummySampleBatch(_: [*]const i16, _: usize) callconv(retro_callconv) usize {
@panic("audio sample batch callback hasn't been initialized");
}
pub var sample: *const SampleFn = if (std.debug.runtime_safety) dummySample else undefined;
pub var sampleBatchCb: *const SampleBatchFn = if (std.debug.runtime_safety) dummySampleBatch else undefined;
pub fn sampleBatch(samples: []const [2]i16) usize {
return sampleBatchCb(@ptrCast(samples.ptr), samples.len);
}
};
pub const input = struct {
pub const PollFn = fn () callconv(retro_callconv) void;
pub const SetPollFn = fn (*const PollFn) callconv(retro_callconv) void;
pub const StateFn = fn (port: c_uint, device: Device, index: c_uint, id: c_uint) callconv(retro_callconv) i16;
pub const SetStateFn = fn (*const StateFn) callconv(retro_callconv) void;
fn dummyPoll() callconv(retro_callconv) void {
@panic("input poll callback hasn't been initialized");
}
fn dummyState(port: c_uint, device: Device, index: c_uint, id: c_uint) callconv(retro_callconv) i16 {
_ = id;
_ = index;
_ = device;
_ = port;
@panic("input state callback hasn't been initialized");
}
pub var poll: *const PollFn = if (std.debug.runtime_safety) dummyPoll else undefined;
pub var state: *const StateFn = if (std.debug.runtime_safety) dummyState else undefined;
pub const joy = struct {
// TODO: should all these enums be c_int instead of c_uint?
pub const Button = enum(c_uint) { b, y, select, start, up, down, left, right, a, x, l, r, l2, r2, l3, r3 };
// TODO: auto generate this from the Button enum
pub const Mask = packed struct(i16) {
b: bool,
y: bool,
select: bool,
start: bool,
up: bool,
down: bool,
left: bool,
right: bool,
a: bool,
x: bool,
l: bool,
r: bool,
l2: bool,
r2: bool,
l3: bool,
r3: bool,
};
pub fn buttons(port: c_uint) Mask {
return @as(Mask, @bitCast(input.state(port, .joypad, 0, 256)));
}
pub fn held(port: c_uint, button: joy.Button) bool {
return input.state(port, .joypad, 0, @intFromEnum(button)) != 0;
}
};
pub const analog = struct {
pub const Index = enum(c_uint) { left, right, button, _ };
pub const Stick = enum { left, right };
pub const Axis = enum { x, y };
pub fn state(port: c_uint, index: Index, id: c_uint) i16 {
return input.state(port, .analog, @intFromEnum(index), id);
}
pub fn x(port: c_uint, stick: Stick) i16 {
return input.analog.state(port, @enumFromInt(@intFromEnum(stick)), @intFromEnum(Axis.x));
}
pub fn y(port: c_uint, stick: Stick) i16 {
return input.analog.state(port, @enumFromInt(@intFromEnum(stick)), @intFromEnum(Axis.y));
}