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gtk: get proper content scaling

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This commit is contained in:
Mitchell Hashimoto
2023-02-23 11:58:50 -08:00
parent 6acf67ec66
commit 90bea1b742
2 changed files with 19 additions and 1 deletions
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8
build.zig
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@ -569,6 +569,14 @@ fn addDeps(
},
.gtk => {
// We need glfw for GTK because we use GLFW to get DPI.
step.addModule("glfw", glfw.module(b));
const glfw_opts: glfw.Options = .{
.metal = step.target.isDarwin(),
.opengl = false,
};
try glfw.link(b, step, glfw_opts);
step.linkSystemLibrary("gtk4");
},
}

12
src/apprt/gtk.zig
View File

@ -4,6 +4,7 @@ const std = @import("std");
const builtin = @import("builtin");
const assert = std.debug.assert;
const Allocator = std.mem.Allocator;
const glfw = @import("glfw");
const apprt = @import("../apprt.zig");
const CoreApp = @import("../App.zig");
const CoreSurface = @import("../Surface.zig");
@ -32,6 +33,12 @@ pub const App = struct {
ctx: *c.GMainContext,
pub fn init(core_app: *CoreApp, opts: Options) !App {
// This is super weird, but we still use GLFW with GTK only so that
// we can tap into their folklore logic to get screen DPI. If we can
// figure out a reliable way to determine this ourselves, we can get
// rid of this dep.
if (!glfw.init(.{})) return error.GlfwInitFailed;
// Create our GTK Application which encapsulates our process.
const app = @ptrCast(?*c.GtkApplication, c.gtk_application_new(
opts.id.ptr,
@ -87,6 +94,7 @@ pub const App = struct {
while (c.g_main_context_iteration(self.ctx, 0) != 0) {}
c.g_main_context_release(self.ctx);
c.g_object_unref(self.app);
glfw.terminate();
}
pub fn wakeup(self: App) void {
@ -310,7 +318,9 @@ pub const Surface = struct {
pub fn getContentScale(self: *const Surface) !apprt.ContentScale {
_ = self;
return .{ .x = 1, .y = 1 };
const monitor = glfw.Monitor.getPrimary() orelse return error.NoMonitor;
const scale = monitor.getContentScale();
return apprt.ContentScale{ .x = scale.x_scale, .y = scale.y_scale };
}
pub fn getSize(self: *const Surface) !apprt.SurfaceSize {