updateSubRect

Update a sub-rectangle of a texture from raw PMA pixel data. The full pixel buffer must be passed (same as for update); only the rows/columns within the given rect will be uploaded.

Falls back to a full update if the backend does not support sub-rect updates.

Only valid between Window.begin and Window.end.

Parameters

tex:*Texture: *Texture
pma:[*]const u8: [*]const u8
x:u32: u32
y:u32: u32
w:u32: u32
h:u32: u32

Source

Implementation

pub fn updateSubRect(tex: *Texture, pma: [*]const u8, x: u32, y: u32, w: u32, h: u32) !void {
    dvui.currentWindow().backend.textureUpdateSubRect(tex.*, pma, x, y, w, h) catch |err| {
        if (err == TextureError.NotImplemented) {
            const full_len = tex.width * tex.height;
            const full: []const Color.PMA = @as([*]const Color.PMA, @ptrCast(@alignCast(pma)))[0..full_len];
            try update(tex, full);
        } else {
            return err;
        }
    };
}