1 files changed, 83 insertions, 0 deletions
diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..ce31e75
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,83 @@
+const std = @import("std");
+const panic = std.debug.panic;
+const c = @import("c.zig");
+const debug_gl = @import("debug_gl.zig");
+const cfg = @import("config.zig");
+const out = @import("output.zig");
+
+var window: *c.GLFWwindow = undefined;
+
+fn errorCallback(err: c_int, description: [*c]const u8) callconv(.C) void {
+    panic("Error: {}\n", .{description});
+}
+
+pub fn main() !void {
+    var config = try cfg.Config.parse("config.yaml");
+    defer config.arena.deinit();
+
+    _ = c.glfwSetErrorCallback(errorCallback);
+
+    if (c.glfwInit() == c.GL_FALSE) {
+        panic("GLFW init failure\n", .{});
+    }
+    defer c.glfwTerminate();
+
+    c.glfwWindowHint(c.GLFW_CONTEXT_VERSION_MAJOR, 3);
+    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, 8);
+    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);
+
+    c.glClearColor(0.0, 0.0, 0.0, 1.0);
+
+    // c.glEnable(c.GL_BLEND);
+    // c.glBlendFunc(c.GL_SRC_ALPHA, c.GL_ONE_MINUS_SRC_ALPHA);
+    // c.glPixelStorei(c.GL_UNPACK_ALIGNMENT, 1);
+
+    c.glViewport(0, 0, config.width, config.height);
+
+    debug_gl.assertNoError();
+
+    var outputs = try config.arena.allocator.alloc(*out.Output, config.outputs.len);
+    for (config.outputs) |output_config, i| {
+        outputs[i] = out.Output.create(&config.arena.allocator, output_config, window);
+    }
+    defer for (outputs) |output| {
+        output.destroy(output);
+    };
+
+    const start_time = c.glfwGetTime();
+    var prev_time = start_time;
+
+    while (c.glfwWindowShouldClose(window) == c.GL_FALSE) {
+        c.glClear(c.GL_COLOR_BUFFER_BIT | c.GL_DEPTH_BUFFER_BIT | c.GL_STENCIL_BUFFER_BIT);
+
+        const now_time = c.glfwGetTime();
+        const elapsed = now_time - prev_time;
+        prev_time = now_time;
+        
+        for (outputs) |output| {
+            const close = output.update(output);
+            if (close) {
+                c.glfwSetWindowShouldClose(window, c.GL_TRUE);
+            }
+        }
+
+        c.glfwSwapBuffers(window);
+
+        c.glfwPollEvents();
+    }
+
+    debug_gl.assertNoError();
+}