From fef523a8d7c87f272de18c8abd57e0cc53e2ef40 Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Sun, 2 Feb 2025 22:24:00 +0100
Subject: screen: drm change raw buffer interface

---
 src/screen/drm/buffer/raw.zig | 31 ++++++++++---------------------
 1 file changed, 10 insertions(+), 21 deletions(-)

(limited to 'src/screen/drm/buffer/raw.zig')

diff --git a/src/screen/drm/buffer/raw.zig b/src/screen/drm/buffer/raw.zig
index e4674eb..a79c6a7 100644
--- a/src/screen/drm/buffer/raw.zig
+++ b/src/screen/drm/buffer/raw.zig
@@ -10,18 +10,16 @@ pub const Raw = struct {
 	id: u32,
 	width: u32,
 	height: u32,
-	bpp: u32,
 	stride: u32,
-	data_size: u64,
-	canvas_size: u64,
 	handle: u32,
-	data: [*]volatile drm.Pixel,
+	pixels: []volatile drm.Pixel,
+	bytes: []volatile u8,
 
-	pub fn init(card: *drm.Card, width: u32, height: u32, bpp: u32) !Self {
+	pub fn init(card: *drm.Card, width: u32, height: u32) !Self {
 		var create_dumb = std.mem.zeroInit(drm.request.CreateDumb, .{
 			.width = width,
 			.height = height,
-			.bpp = bpp,
+			.bpp = 32,
 		});
 		try card.request(
 			.create_dumb,
@@ -32,12 +30,10 @@ pub const Raw = struct {
 			.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,
+			.pixels = undefined,
+			.bytes = undefined,
 			.card = card,
 		};
 
@@ -69,7 +65,7 @@ pub const Raw = struct {
 
 		const address = os.mmap(
 			null,
-			fb.data_size,
+			create_dumb.size,
 			os.PROT.READ | os.PROT.WRITE,
 			.{ .TYPE = os.MAP_TYPE.SHARED },
 			card.file.handle,
@@ -78,22 +74,15 @@ pub const Raw = struct {
 
 		try cerror.from_usize(address);
 
-		fb.data = @ptrFromInt(address);
+		fb.pixels = @as([*]volatile drm.Pixel, @ptrFromInt(address))[0..create_dumb.size / 4];
+		fb.bytes = @as([*]volatile u8, @ptrFromInt(address))[0..create_dumb.size];
 
 		return fb;
 	}
 
-	pub fn set(self: *Self, x: u32, y: u32, p: drm.Pixel) void {
-		self.data[x + self.width * y] = p;
-	}
-
-	pub fn fill(self: *Self, p: drm.Pixel) void {
-		@memset(self.data[0..self.canvas_size], p);
-	}
-
 	pub fn deinit(self: *Self) void {
 		cerror.from_usize(
-			os.munmap(@ptrCast(@volatileCast(self.data)), self.data_size)
+			os.munmap(@ptrCast(@volatileCast(self.bytes)), self.bytes.len)
 		) catch |err| std.debug.panic("munmap failed in frame-buffer: {}", .{err});
 
 		self.card.request(
-- 
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