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const std = @import("std");
const os = std.os.linux;
const cerror = @import("../cerror.zig");
const Card = @import("card.zig").Card;
const Drm = @import("request.zig").Drm;
const RawResources = extern struct {
fb_ids: ?*u32,
crtc_ids: ?*u32,
connector_ids: ?*u32,
encoder_ids: ?*u32,
count_fbs: u32,
count_crtcs: u32,
count_connectors: u32,
count_encoders: u32,
min_width: u32,
max_width: u32,
min_height: u32,
max_height: u32,
};
pub const Resources = struct {
const Self = @This();
const Range = struct { min: u32, max: u32 };
card: *Card,
fb_ids: []u32,
crtc_ids: []u32,
connector_ids: []u32,
encoder_ids: []u32,
width: Range,
height: Range,
pub fn raw_without_ids(card: *Card) !RawResources {
var result = std.mem.zeroes(RawResources);
try Drm.get_resources.request(card.file.handle, RawResources, &result);
return result;
}
// NOTE: This function does not take in account
// that there might be some hot-plugging going
// on. This might have to change in the future.
pub fn init(card: *Card) !Self {
var raw = try Self.raw_without_ids(card);
const resources = .{
.fb_ids = try card.allocator.alloc(u32, raw.count_fbs),
.crtc_ids = try card.allocator.alloc(u32, raw.count_crtcs),
.connector_ids = try card.allocator.alloc(u32, raw.count_connectors),
.encoder_ids = try card.allocator.alloc(u32, raw.count_encoders),
.width = .{ .min = raw.min_width, .max = raw.max_width },
.height = .{ .min = raw.min_height, .max = raw.max_height },
.card = card,
};
@memset(resources.fb_ids, 0);
@memset(resources.crtc_ids, 0);
@memset(resources.connector_ids, 0);
@memset(resources.encoder_ids, 0);
raw.fb_ids = @ptrCast(resources.fb_ids);
raw.crtc_ids = @ptrCast(resources.crtc_ids);
raw.connector_ids = @ptrCast(resources.connector_ids);
raw.encoder_ids = @ptrCast(resources.encoder_ids);
try Drm.get_resources.request(card.file.handle, RawResources, &raw);
return resources;
}
pub fn deinit(self: *Self) void {
self.card.allocator.free(self.fb_ids);
self.card.allocator.free(self.crtc_ids);
self.card.allocator.free(self.connector_ids);
self.card.allocator.free(self.encoder_ids);
}
};
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