libvaxis/examples/image.zig
Tim Culverhouse 43f73eb895 image: implement deleting images from memory
Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
2024-01-31 07:18:16 -06:00

66 lines
1.6 KiB
Zig

const std = @import("std");
const vaxis = @import("vaxis");
const log = std.log.scoped(.main);
const Event = union(enum) {
key_press: vaxis.Key,
winsize: vaxis.Winsize,
};
pub fn main() !void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer {
const deinit_status = gpa.deinit();
if (deinit_status == .leak) {
log.err("memory leak", .{});
}
}
const alloc = gpa.allocator();
var vx = try vaxis.init(Event, .{});
defer vx.deinit(alloc);
try vx.startReadThread();
defer vx.stopReadThread();
try vx.enterAltScreen();
try vx.queryTerminal();
const imgs = [_]vaxis.Image{
try vx.loadImage(alloc, .{ .path = "examples/zig.png" }),
try vx.loadImage(alloc, .{ .path = "examples/vaxis.png" }),
};
defer vx.freeImage(imgs[0].id);
defer vx.freeImage(imgs[1].id);
var n: usize = 0;
while (true) {
const event = vx.nextEvent();
switch (event) {
.key_press => |key| {
if (key.matches('c', .{ .ctrl = true })) {
return;
} else if (key.matches('l', .{ .ctrl = true })) {
vx.queueRefresh();
}
},
.winsize => |ws| try vx.resize(alloc, ws),
}
n = (n + 1) % imgs.len;
const win = vx.window();
win.clear();
const img = imgs[n];
const dims = try img.cellSize(win);
const center = vaxis.alignment.center(win, dims.cols, dims.rows);
const scale = false;
const z_index = 0;
img.draw(center, scale, z_index);
try vx.render();
}
}