9 files changed, 118 insertions, 0 deletions
diff --git a/src/audio/audio.cpp b/src/audio/audio.cpp
new file mode 100644
index 0000000..9e778f1
--- /dev/null
+++ b/src/audio/audio.cpp
@@ -0,0 +1,33 @@
+#define MINIAUDIO_IMPLEMENTATION
+#include "miniaudio.h"
+#include <math.h>
+
+static ma_device device;
+static float phase = 0.0f;
+
+static void audio_callback(ma_device*, void* output, const void*, ma_uint32 frames) {
+    int16_t* out = (int16_t*)output;
+    const float freq = 440.0f;
+    const float sr = 32000.0f;
+
+    for (ma_uint32 i = 0; i < frames; i++) {
+        float s = sinf(phase) * 0.2f;
+        phase += 2.0f * 3.14159265f * freq / sr;
+        if (phase > 2.0f * 3.14159265f) phase -= 2.0f * 3.14159265f;
+        out[i] = (int16_t)(s * 32767.0f);
+    }
+}
+
+void audio_init() {
+    ma_device_config cfg = ma_device_config_init(ma_device_type_playback);
+    cfg.playback.format = ma_format_s16;
+    cfg.playback.channels = 1;
+    cfg.sampleRate = 32000;
+    cfg.dataCallback = audio_callback;
+
+    ma_device_init(nullptr, &cfg, &device);
+    ma_device_start(&device);
+}
+
+void audio_update() {}
+void audio_shutdown() { ma_device_uninit(&device); }
diff --git a/src/audio/audio.h b/src/audio/audio.h
new file mode 100644
index 0000000..b3dde7f
--- /dev/null
+++ b/src/audio/audio.h
@@ -0,0 +1,4 @@
+#pragma once
+void audio_init();
+void audio_update();
+void audio_shutdown();
diff --git a/src/gpu/gpu.cpp b/src/gpu/gpu.cpp
new file mode 100644
index 0000000..4e48887
--- /dev/null
+++ b/src/gpu/gpu.cpp
@@ -0,0 +1,5 @@
+#include "gpu.h"
+
+void gpu_init(GLFWwindow*) {}
+void gpu_draw() {}
+void gpu_shutdown() {}
diff --git a/src/gpu/gpu.h b/src/gpu/gpu.h
new file mode 100644
index 0000000..02204af
--- /dev/null
+++ b/src/gpu/gpu.h
@@ -0,0 +1,6 @@
+#pragma once
+struct GLFWwindow;
+
+void gpu_init(GLFWwindow* window);
+void gpu_draw();
+void gpu_shutdown();
diff --git a/src/gpu/shader.wgsl b/src/gpu/shader.wgsl
new file mode 100644
index 0000000..4e0ec11
--- /dev/null
+++ b/src/gpu/shader.wgsl
@@ -0,0 +1,14 @@
+@vertex
+fn vs_main(@builtin(vertex_index) i: u32) -> @builtin(position) vec4<f32> {
+    var pos = array<vec2<f32>, 3>(
+        vec2<f32>(-1.0, -1.0),
+        vec2<f32>( 3.0, -1.0),
+        vec2<f32>(-1.0,  3.0)
+    );
+    return vec4<f32>(pos[i], 0.0, 1.0);
+}
+
+@fragment
+fn fs_main() -> @location(0) vec4<f32> {
+    return vec4<f32>(0.0, 0.0, 0.0, 1.0);
+}
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..3b61e1e
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,20 @@
+#include "platform.h"
+#include "gpu/gpu.h"
+#include "audio/audio.h"
+
+int main() {
+    platform_init();
+    gpu_init(platform_get_window());
+    audio_init();
+
+    while (!platform_should_close()) {
+        platform_poll();
+        gpu_draw();
+        audio_update();
+    }
+
+    audio_shutdown();
+    gpu_shutdown();
+    platform_shutdown();
+    return 0;
+}
diff --git a/src/platform.cpp b/src/platform.cpp
new file mode 100644
index 0000000..adb41d2
--- /dev/null
+++ b/src/platform.cpp
@@ -0,0 +1,26 @@
+#include "platform.h"
+#include <GLFW/glfw3.h>
+
+static GLFWwindow* window = nullptr;
+
+void platform_init() {
+    glfwInit();
+    window = glfwCreateWindow(1280, 720, "demo64k", nullptr, nullptr);
+}
+
+void platform_shutdown() {
+    glfwDestroyWindow(window);
+    glfwTerminate();
+}
+
+void platform_poll() {
+    glfwPollEvents();
+}
+
+bool platform_should_close() {
+    return glfwWindowShouldClose(window);
+}
+
+GLFWwindow* platform_get_window() {
+    return window;
+}
diff --git a/src/platform.h b/src/platform.h
new file mode 100644
index 0000000..0ebeb59
--- /dev/null
+++ b/src/platform.h
@@ -0,0 +1,8 @@
+#pragma once
+struct GLFWwindow;
+
+void platform_init();
+void platform_shutdown();
+void platform_poll();
+bool platform_should_close();
+GLFWwindow* platform_get_window();
diff --git a/src/util/math.h b/src/util/math.h
new file mode 100644
index 0000000..084dfd1
--- /dev/null
+++ b/src/util/math.h
@@ -0,0 +1,2 @@
+#pragma once
+#define PI 3.14159265f