Added Imgui Android implementation

3 files changed, 150 insertions, 0 deletions

diff --git a/Imgui/CMakeLists.txt b/Imgui/CMakeLists.txt
index c9eb859..6ae0b61 100644
--- a/Imgui/CMakeLists.txt
+++ b/Imgui/CMakeLists.txt
@@ -49,6 +49,9 @@ elseif(PLATFORM_UNIVERSAL_WINDOWS)
 elseif(PLATFORM_LINUX)
     list(APPEND SOURCE src/ImGuiImplLinuxXCB.cpp src/ImGuiImplLinuxX11.cpp)
     list(APPEND INTERFACE interface/ImGuiImplLinuxXCB.h interface/ImGuiImplLinuxX11.h)
+elseif(PLATFORM_ANDROID)
+    list(APPEND SOURCE src/ImGuiImplAndroid.cpp)
+    list(APPEND INTERFACE interface/ImGuiImplAndroid.h)
 elseif(PLATFORM_MACOS)
     list(APPEND DEAR_IMGUI_SOURCE ${DEAR_IMGUI_PATH}/examples/imgui_impl_osx.mm)
     list(APPEND DEAR_IMGUI_INCLUDE ${DEAR_IMGUI_PATH}/examples/imgui_impl_osx.h)
diff --git a/Imgui/interface/ImGuiImplAndroid.h b/Imgui/interface/ImGuiImplAndroid.h
new file mode 100644
index 0000000..7639f28
--- /dev/null
+++ b/Imgui/interface/ImGuiImplAndroid.h
@@ -0,0 +1,61 @@
+/*     Copyright 2019 Diligent Graphics LLC
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#pragma once
+
+#include <memory>
+#include <chrono>
+
+#include "ImGuiImplDiligent.h"
+
+namespace Diligent
+{
+
+class ImGuiImplAndroid final : public ImGuiImplDiligent
+{
+public:
+    ImGuiImplAndroid(IRenderDevice*    pDevice,
+                     TEXTURE_FORMAT    BackBufferFmt,
+                     TEXTURE_FORMAT    DepthBufferFmt,
+                     Uint32            DisplayWidht,
+                     Uint32            DisplayHeight,
+                     Uint32            InitialVertexBufferSize = ImGuiImplDiligent::DefaultInitialVBSize,
+                     Uint32            InitialIndexBufferSize  = ImGuiImplDiligent::DefaultInitialIBSize);
+    ~ImGuiImplAndroid();
+
+    ImGuiImplAndroid             (const ImGuiImplAndroid&)  = delete;
+    ImGuiImplAndroid             (      ImGuiImplAndroid&&) = delete;
+    ImGuiImplAndroid& operator = (const ImGuiImplAndroid&)  = delete;
+    ImGuiImplAndroid& operator = (      ImGuiImplAndroid&&) = delete;
+
+    virtual void NewFrame()override final;
+
+    bool BeginDrag(float x, float y);
+    bool DragMove(float x, float y);
+    bool EndDrag();
+
+private:
+    std::chrono::time_point<std::chrono::high_resolution_clock> m_LastTimestamp = {};
+};
+
+}
diff --git a/Imgui/src/ImGuiImplAndroid.cpp b/Imgui/src/ImGuiImplAndroid.cpp
new file mode 100644
index 0000000..55101f5
--- /dev/null
+++ b/Imgui/src/ImGuiImplAndroid.cpp
@@ -0,0 +1,86 @@
+/*     Copyright 2019 Diligent Graphics LLC
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#include "imgui.h"
+
+#include "ImGuiImplAndroid.h"
+
+namespace Diligent
+{
+
+ImGuiImplAndroid::ImGuiImplAndroid(IRenderDevice*    pDevice,
+                                   TEXTURE_FORMAT    BackBufferFmt,
+                                   TEXTURE_FORMAT    DepthBufferFmt,
+                                   Uint32            DisplayWidth,
+                                   Uint32            DisplayHeight,
+                                   Uint32            InitialVertexBufferSize,
+                                   Uint32            InitialIndexBufferSize) :
+     ImGuiImplDiligent(pDevice, BackBufferFmt, DepthBufferFmt, InitialVertexBufferSize, InitialIndexBufferSize)
+{
+
+    auto& io = ImGui::GetIO();
+    io.DisplaySize = ImVec2(DisplayWidth, DisplayHeight);
+    io.FontGlobalScale = 2;
+    io.BackendPlatformName = "Diligent-ImGuiImplAndroid";
+
+    m_LastTimestamp = std::chrono::high_resolution_clock::now();
+}
+
+ImGuiImplAndroid::~ImGuiImplAndroid()
+{
+}
+
+void ImGuiImplAndroid::NewFrame()
+{
+    auto now = std::chrono::high_resolution_clock::now();
+    auto elapsed_ns =  now - m_LastTimestamp;
+    m_LastTimestamp = now;
+    auto& io = ImGui::GetIO();
+    io.DeltaTime = static_cast<float>(elapsed_ns.count() / 1e+9);
+
+    ImGuiImplDiligent::NewFrame();
+}
+
+bool ImGuiImplAndroid::BeginDrag(float x, float y)
+{
+    auto& io = ImGui::GetIO();
+    io.MousePos = ImVec2(x, y);
+    io.MouseDown[0] = true;
+    return io.WantCaptureMouse;
+}
+
+bool ImGuiImplAndroid::DragMove(float x, float y)
+{
+    auto& io = ImGui::GetIO();
+    io.MousePos = ImVec2(x, y);
+    return io.WantCaptureMouse;
+}
+
+bool ImGuiImplAndroid::EndDrag()
+{
+    auto& io = ImGui::GetIO();
+    io.MouseDown[0] = false;
+    return io.WantCaptureMouse;
+}
+
+}