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iOS: Fix crash on device

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This commit is contained in:
yonihemi
2025-01-06 22:01:41 +08:00
parent 6181487bad
commit 63a47d0ba5
2 changed files with 27 additions and 12 deletions
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35
src/renderer/Metal.zig
View File

@ -209,20 +209,31 @@ pub const GPUState = struct {
}
fn chooseDevice() error{NoMetalDevice}!objc.Object {
const devices = objc.Object.fromId(mtl.MTLCopyAllDevices());
defer devices.release();
var chosen_device: ?objc.Object = null;
var iter = devices.iterate();
while (iter.next()) |device| {
// We want a GPU that’s connected to a display.
if (device.getProperty(bool, "isHeadless")) continue;
chosen_device = device;
// If the user has an eGPU plugged in, they probably want
// to use it. Otherwise, integrated GPUs are better for
// battery life and thermals.
if (device.getProperty(bool, "isRemovable") or
device.getProperty(bool, "isLowPower")) break;
switch (comptime builtin.os.tag) {
.macos => {
const devices = objc.Object.fromId(mtl.MTLCopyAllDevices());
defer devices.release();
var iter = devices.iterate();
while (iter.next()) |device| {
// We want a GPU that’s connected to a display.
if (device.getProperty(bool, "isHeadless")) continue;
chosen_device = device;
// If the user has an eGPU plugged in, they probably want
// to use it. Otherwise, integrated GPUs are better for
// battery life and thermals.
if (device.getProperty(bool, "isRemovable") or
device.getProperty(bool, "isLowPower")) break;
}
},
.ios => {
chosen_device = objc.Object.fromId(mtl.MTLCreateSystemDefaultDevice());
},
else => @compileError("unsupported target for Metal"),
}
const device = chosen_device orelse return error.NoMetalDevice;
return device.retain();
}

4
src/renderer/metal/api.zig
View File

@ -175,4 +175,8 @@ pub const MTLSize = extern struct {
depth: c_ulong,
};
/// https://developer.apple.com/documentation/metal/1433367-mtlcopyalldevices
pub extern "c" fn MTLCopyAllDevices() ?*anyopaque;
/// https://developer.apple.com/documentation/metal/1433401-mtlcreatesystemdefaultdevice
pub extern "c" fn MTLCreateSystemDefaultDevice() ?*anyopaque;