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const std = @import("std");
const debug = std.debug;
const panic = debug.panic;
const c = @import("c.zig");
const debug_gl = @import("debug_gl.zig");
const cfg = @import("config.zig");
const out = @import("output.zig");
const gl = @import("gl.zig");
const ctrl = @import("control.zig");
const c_allocator = std.heap.c_allocator;
var window: *c.GLFWwindow = undefined;
fn errorCallback(err: c_int, description: [*c]const u8) callconv(.C) void {
panic("Error {}: {s}\n", .{ err, description });
}
pub fn main() !void {
const progress = std.Progress.start(.{});
defer progress.end();
var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
defer arena.deinit();
var config = try cfg.Config.init(arena.allocator());
_ = c.glfwSetErrorCallback(errorCallback);
if (c.glfwInit() == c.GL_FALSE) {
panic("GLFW init failure\n", .{});
}
defer c.glfwTerminate();
var monitor_count: c_int = 0;
const monitors = c.glfwGetMonitors(&monitor_count);
for (monitors[0..@as(usize, @intCast(monitor_count))], 0..) |monitor, i| {
debug.print(
"monitor {}: '{s}'\n",
.{ i, @as([*:0]const u8, @ptrCast(c.glfwGetMonitorName(monitor))) },
);
}
c.glfwWindowHint(c.GLFW_CONTEXT_VERSION_MAJOR, 4);
c.glfwWindowHint(c.GLFW_CONTEXT_VERSION_MINOR, 2);
c.glfwWindowHint(c.GLFW_OPENGL_FORWARD_COMPAT, c.GL_TRUE);
c.glfwWindowHint(c.GLFW_OPENGL_DEBUG_CONTEXT, debug_gl.is_on);
c.glfwWindowHint(c.GLFW_OPENGL_PROFILE, c.GLFW_OPENGL_CORE_PROFILE);
c.glfwWindowHint(c.GLFW_DEPTH_BITS, 0);
c.glfwWindowHint(c.GLFW_STENCIL_BITS, 0);
c.glfwWindowHint(c.GLFW_VISIBLE, c.GLFW_FALSE);
window = c.glfwCreateWindow(config.width, config.height, "glsl-view", null, null) orelse {
panic("unable to create window\n", .{});
};
defer c.glfwDestroyWindow(window);
c.glfwMakeContextCurrent(window);
c.glfwSwapInterval(1);
var constants = try gl.Constants.create(window, &config);
defer constants.destroy();
var outputs = try std.ArrayList(*out.Output).initCapacity(arena.allocator(), config.outputs.len);
defer outputs.deinit();
for (config.outputs) |*output_config| {
try outputs.append(out.Output.create(arena.allocator(), output_config, &constants));
}
defer for (outputs.items) |output| {
output.destroy(arena.allocator());
};
c.glfwMakeContextCurrent(window);
c.glClearColor(0.0, 0.0, 0.0, 1.0);
debug_gl.assertNoError();
debug_gl.init();
const start_time = c.glfwGetTime();
var prev_time = start_time;
constants.normalized_quad.bind(0);
var main_program = try gl.ShaderProgram.create(
\\#version 330 core
\\
\\layout(location = 0) in vec2 position;
\\out vec2 uv;
\\
\\void main() {
\\ uv = position / 2.0 + 0.5;
\\ gl_Position = vec4(position, 0, 1);
\\}
,
\\#version 330 core
\\
\\in vec2 uv;
\\out vec4 color;
\\
\\void main() {
\\ color = vec4(0,0,0,1);
\\}
);
defer main_program.destroy();
var fbo = try gl.FramebufferObject.create(config.width, config.height);
defer fbo.destroy();
// const shader_file = try std.fs.cwd().openFile(config.fragment, .{});
// var last_stat = try shader_file.stat();
// try main_program.loadFile(config.fragment, last_stat.size);
var cache = gl.UniformCache.init(std.heap.c_allocator, &main_program);
defer cache.deinit();
const control = try ctrl.ControlServer.init(arena.allocator(), progress, &config, &cache);
defer control.destroy();
while (c.glfwWindowShouldClose(window) == c.GL_FALSE) {
c.glfwMakeContextCurrent(window);
c.glClear(c.GL_COLOR_BUFFER_BIT);
const now_time = c.glfwGetTime();
prev_time = now_time;
control.update();
// const stat = try shader_file.stat();
// if (stat.mtime > last_stat.mtime or control.reload_requested) {
// try main_program.loadFile(config.fragment, stat.size);
// try cache.refresh();
// last_stat = stat;
//
// control.reload_requested = false;
// }
fbo.bind();
c.glClear(c.GL_COLOR_BUFFER_BIT);
main_program.bind();
constants.normalized_quad.draw();
fbo.unbind();
for (outputs.items, 0..) |output, i| {
const close = output.update(fbo.texture_id);
if (close) {
const removed = outputs.swapRemove(i);
removed.destroy(arena.allocator());
break;
}
}
if (outputs.items.len == 0)
break;
c.glfwPollEvents();
}
}
|
