5 files changed, 152 insertions, 0 deletions
diff --git a/src/main/kotlin/gui/CpuRegisterWindow.kt b/src/main/kotlin/gui/CpuRegisterWindow.kt
new file mode 100644
index 0000000..0de7ad6
--- /dev/null
+++ b/src/main/kotlin/gui/CpuRegisterWindow.kt
@@ -0,0 +1,52 @@
+package gui
+
+import cpu.Registers
+import glm_.vec2.Vec2
+import imgui.Cond
+import imgui.ImGui
+
+fun paintCpuRegisterWindow(registers: Registers) {
+  with(ImGui) {
+    setNextWindowSize(Vec2(200, 300), Cond.FirstUseEver)
+    setNextWindowPos(Vec2(20, 150), Cond.FirstUseEver)
+    begin("CPU state")
+
+    text("Registers:")
+    separator()
+
+    columns(2, "cpuReg", false)
+
+    text(String.format("A: 0x%02X", registers.A))
+    nextColumn()
+    text(String.format("F: 0x%02X", registers.F))
+    nextColumn()
+    text(String.format("B: 0x%02X", registers.B))
+    nextColumn()
+    text(String.format("C: 0x%02X", registers.C))
+    nextColumn()
+    text(String.format("D: 0x%02X", registers.D))
+    nextColumn()
+    text(String.format("E: 0x%02X", registers.E))
+    nextColumn()
+    text(String.format("H: 0x%02X", registers.H))
+    nextColumn()
+    text(String.format("L: 0x%02X", registers.L))
+    nextColumn()
+    text(String.format("SP: 0x%04X", registers.SP))
+    nextColumn()
+    text(String.format("PC: 0x%04X", registers.PC))
+
+    columns(1)
+    newLine()
+    text("Flags:")
+    separator()
+
+    text("ZERO: ${registers.getFlag(Registers.Flag.ZERO) == 1}")
+    text("SUBTRACT: ${registers.getFlag(Registers.Flag.SUBTRACT) == 1}")
+    text("HALF_CARRY: ${registers.getFlag(Registers.Flag.HALF_CARRY) == 1}")
+    text("CARRY: ${registers.getFlag(Registers.Flag.CARRY) == 1}")
+
+    end()
+  }
+}
+
diff --git a/src/main/kotlin/gui/DebugWindow.kt b/src/main/kotlin/gui/DebugWindow.kt
new file mode 100644
index 0000000..d80d2b3
--- /dev/null
+++ b/src/main/kotlin/gui/DebugWindow.kt
@@ -0,0 +1,14 @@
+package gui
+
+import glm_.vec2.Vec2
+import imgui.Cond
+import imgui.ImGui
+
+fun paintDebugWindow() {
+  with(ImGui) {
+    setNextWindowPos(Vec2(20, 50), Cond.FirstUseEver)
+    begin("Debug info")
+    text("%.1f FPS (%.2f ms/frame)", io.framerate, 1_000f / io.framerate)
+    end()
+  }
+}
+\ No newline at end of file
diff --git a/src/main/kotlin/gui/EmulationOutputWindow.kt b/src/main/kotlin/gui/EmulationOutputWindow.kt
new file mode 100644
index 0000000..489edbe
--- /dev/null
+++ b/src/main/kotlin/gui/EmulationOutputWindow.kt
@@ -0,0 +1,15 @@
+package gui
+
+import glm_.vec2.Vec2
+import imgui.Cond
+import imgui.ImGui
+
+fun paintEmulationOutputWindow() {
+  with(ImGui) {
+    setNextWindowSize(Vec2(640, 576), Cond.FirstUseEver)
+    setNextWindowPos(Vec2(400, 50), Cond.FirstUseEver)
+    begin("Emulation output - 4x scale")
+    text("TODO - actually render something...")
+    end()
+  }
+}
+\ No newline at end of file
diff --git a/src/main/kotlin/gui/Run.kt b/src/main/kotlin/gui/Run.kt
new file mode 100644
index 0000000..727c539
--- /dev/null
+++ b/src/main/kotlin/gui/Run.kt
@@ -0,0 +1,5 @@
+package gui
+
+fun main(args: Array<String>) {
+  WindowContainer().run()
+}
+\ No newline at end of file
diff --git a/src/main/kotlin/gui/WindowContainer.kt b/src/main/kotlin/gui/WindowContainer.kt
new file mode 100644
index 0000000..5e101b7
--- /dev/null
+++ b/src/main/kotlin/gui/WindowContainer.kt
@@ -0,0 +1,66 @@
+package gui
+
+import cpu.Cpu
+import glm_.vec4.Vec4
+import gln.checkError
+import imgui.Context
+import imgui.ImGui
+import imgui.destroy
+import imgui.impl.LwjglGL3
+import org.lwjgl.opengl.GL11
+import uno.glfw.GlfwWindow
+import uno.glfw.glfw
+
+class WindowContainer {
+
+  var cpu: Cpu
+
+  init {
+    glfw.init("3.2")
+    cpu = Cpu()
+  }
+
+  val window = GlfwWindow(1280, 720, "KGB - KotlinGameBoy").apply {
+    init()
+  }
+
+
+  fun run() {
+
+    // Enable vsync
+    glfw.swapInterval = 1
+
+    val ctx = Context()
+    LwjglGL3.init(window)
+    ImGui.styleColorsDark()
+
+    window.loop(::mainLoop)
+
+    LwjglGL3.shutdown()
+    ctx.destroy()
+
+    window.destroy()
+    glfw.terminate()
+
+  }
+
+  private fun mainLoop() {
+
+    LwjglGL3.newFrame()
+
+    with(ImGui) {
+      paintDebugWindow()
+      paintEmulationOutputWindow()
+      paintCpuRegisterWindow(cpu.registers)
+    }
+
+    gln.glViewport(window.framebufferSize)
+    gln.glClearColor(Vec4(0.45f, 0.55f, 0.6f, 1f))
+    GL11.glClear(GL11.GL_COLOR_BUFFER_BIT)
+
+    ImGui.render()
+    LwjglGL3.renderDrawData(ImGui.drawData!!)
+
+    checkError("mainLoop")
+  }
+}
+\ No newline at end of file