44 lines
921 B
Zig
44 lines
921 B
Zig
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const std = @import("std");
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const Cell = @import("cell.zig").Cell;
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const Screen = @This();
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width: usize,
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height: usize,
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buf: []Cell = undefined,
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pub fn init() Screen {
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return Screen{
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.width = 0,
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.height = 0,
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};
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}
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pub fn deinit(self: *Screen, alloc: std.mem.Allocator) void {
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alloc.free(self.buf);
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}
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pub fn resize(self: *Screen, alloc: std.mem.Allocator, w: usize, h: usize) !void {
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alloc.free(self.buf);
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self.buf = try alloc.alloc(Cell, w * h);
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self.width = w;
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self.height = h;
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}
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/// writes a cell to a location. 0 indexed
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pub fn writeCell(self: *Screen, cell: Cell, row: usize, col: usize) void {
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if (self.width < col) {
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// column out of bounds
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return;
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}
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if (self.height < row) {
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// height out of bounds
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return;
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}
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const i = (col * self.width) + row;
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std.debug.assert(i < self.buf.len);
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self.buf[i] = cell;
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}
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