From 811a6bd572f4c6b26e99b4e746f5d710947ee934 Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Sun, 2 Feb 2025 21:54:14 +0100
Subject: screen: drm change struct layout

---
 src/screen/drm/frame-buffer/root.zig | 188 -----------------------------------
 1 file changed, 188 deletions(-)
 delete mode 100644 src/screen/drm/frame-buffer/root.zig

(limited to 'src/screen/drm/frame-buffer/root.zig')

diff --git a/src/screen/drm/frame-buffer/root.zig b/src/screen/drm/frame-buffer/root.zig
deleted file mode 100644
index e0e51f8..0000000
--- a/src/screen/drm/frame-buffer/root.zig
+++ /dev/null
@@ -1,188 +0,0 @@
-const std = @import("std");
-const os = std.os.linux;
-const Card = @import("../card.zig").Card;
-const Drm = @import("../request.zig").Drm;
-const PixelFormat = @import("pixelformat.zig").PixelFormat;
-const cerror = @import("../../cerror.zig");
-
-const CreateDumb = extern struct {
-	height: u32,
-	width: u32,
-	bpp: u32,
-	flags: u32,
-	handle: u32,
-	pitch: u32,
-	size: u32,
-};
-
-const FrameBufferCmd2 = extern struct {
-	id: u32,
-	width: u32,
-	height: u32,
-	pixel_format: PixelFormat,
-	flags: u32,
-	handles: [4]u32,
-	pitches: [4]u32,
-	offsets: [4]u32,
-	modifier: [4]u32,
-};
-
-const MapDumb = extern struct {
-	handle: u32,
-	__padding: u32,
-	offset: i64,
-};
-
-pub const DoubleBuffer = struct {
-	const Self = @This();
-
-	back: FrameBuffer,
-	front: FrameBuffer,
-
-	pub fn init(card: *Card, width: u32, height: u32, bpp: u32) !Self {
-		return .{
-			.back = try FrameBuffer.init(card, width, height, bpp),
-			.front = try FrameBuffer.init(card, width, height, bpp),
-		};
-	}
-
-	pub fn swap(self: *Self) void {
-		const back_data = self.back.data;
-		self.back.data = self.front.data;
-		self.front.data = back_data;
-
-		const back_id = self.back.id;
-		self.back.id = self.front.id;
-		self.front.id = back_id;
-	}
-
-	pub fn deinit(self: *Self) void {
-		self.back.deinit();
-		self.front.deinit();
-	}
-
-	pub fn buffer(self: *Self) *FrameBuffer {
-		return &self.back;
-	}
-
-	pub fn crtc_buffer(self: *Self) *FrameBuffer {
-		return &self.front;
-	}
-};
-
-pub const Pixel = packed struct(u32) {
-	blue: u8,
-	green: u8,
-	red: u8,
-	_padding: u8 = 0x0,
-};
-
-pub const FrameBuffer = struct {
-	const Self = @This();
-
-	card: *Card,
-	id: u32,
-	width: u32,
-	height: u32,
-	bpp: u32,
-	stride: u32,
-	data_size: u64,
-	canvas_size: u64,
-	handle: u32,
-	data: [*]volatile Pixel,
-
-	pub fn init(card: *Card, width: u32, height: u32, bpp: u32) !Self {
-		var create_dumb = std.mem.zeroInit(CreateDumb, .{
-			.width = width,
-			.height = height,
-			.bpp = bpp,
-		});
-		try Drm.create_dumb.request(
-			card.file.handle,
-			CreateDumb,
-			&create_dumb
-		);
-
-		var fb = Self {
-			.id = 0,
-			.width = create_dumb.width,
-			.height = create_dumb.height,
-			.bpp = create_dumb.bpp,
-			.stride = create_dumb.pitch,
-			.data_size = create_dumb.size,
-			.canvas_size = create_dumb.size / (bpp / 8),
-			.handle = create_dumb.handle,
-			.data = undefined,
-			.card = card,
-		};
-
-		var buffer_cmd = FrameBufferCmd2 {
-			.id = 0,
-			.width = fb.width,
-			.height = fb.height,
-			.pixel_format = PixelFormat.xrgb8888,
-			.flags = 0,
-			.handles = [_] u32 { fb.handle, 0, 0, 0 },
-			.pitches = [_] u32 { fb.stride, 0, 0, 0 },
-			.offsets = [_] u32 { 0, 0, 0, 0 },
-			.modifier = [_] u32 { 0, 0, 0, 0 },
-		};
-
-		try Drm.add_frame_buffer2.request(
-			card.file.handle,
-			FrameBufferCmd2,
-			&buffer_cmd
-		);
-
-		fb.id = buffer_cmd.id;
-
-		var map_dumb = std.mem.zeroInit(MapDumb, .{ .handle = fb.handle });
-
-		try Drm.map_dumb.request(
-			card.file.handle,
-			MapDumb,
-			&map_dumb
-		);
-
-		const address = os.mmap(
-			null,
-			fb.data_size,
-			os.PROT.READ | os.PROT.WRITE,
-			.{ .TYPE = os.MAP_TYPE.SHARED },
-			card.file.handle,
-			map_dumb.offset
-		);
-
-		try cerror.from_usize(address);
-
-		fb.data = @ptrFromInt(address);
-
-		return fb;
-	}
-
-	pub fn set(self: *Self, x: u32, y: u32, pixel: Pixel) void {
-		self.data[x + self.width * y] = pixel;
-	}
-
-	pub fn fill(self: *Self, pixel: Pixel) void {
-		@memset(self.data[0..self.canvas_size], pixel);
-	}
-
-	pub fn deinit(self: *Self) void {
-		cerror.from_usize(
-			os.munmap(@ptrCast(@volatileCast(self.data)), self.data_size)
-		) catch |err| std.debug.panic("munmap failed in frame-buffer: {}", .{err});
-
-		Drm.remove_frame_buffer.request(
-			self.card.file.handle,
-			u32,
-			&self.id
-		) catch @panic("failed to remove frame-buffer");
-
-		Drm.destroy_dumb.request(
-			self.card.file.handle,
-			u32,
-			&self.handle
-		) catch @panic("failed to destroy dumb-buffer");
-	}
-};
-- 
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