Implement window resize

src/engine/engine.cc

@@ -113,18 +113,7 @@ void Engine::Initialize() {
 
   CreateRendererInternal(RendererType::kVulkan);
 
-  // Normalize viewport.
-  if (GetScreenWidth() > GetScreenHeight()) {
-    float aspect_ratio = (float)GetScreenWidth() / (float)GetScreenHeight();
-    LOG(0) << "aspect ratio: " << aspect_ratio;
-    screen_size_ = {aspect_ratio * 2.0f, 2.0f};
-    projection_.CreateOrthoProjection(-aspect_ratio, aspect_ratio, -1.0f, 1.0f);
-  } else {
-    float aspect_ratio = (float)GetScreenHeight() / (float)GetScreenWidth();
-    LOG(0) << "aspect_ratio: " << aspect_ratio;
-    screen_size_ = {2.0f, aspect_ratio * 2.0f};
-    projection_.CreateOrthoProjection(-1.0, 1.0, -aspect_ratio, aspect_ratio);
-  }
+  CreateProjectionMatrix();
 
   LOG(0) << "image scale factor: " << GetImageScaleFactor();
 
@@ -458,11 +447,11 @@ TextureCompressor* Engine::GetTextureCompressor(bool opacity) {
 }
 
 int Engine::GetScreenWidth() const {
-  return renderer_->screen_width();
+  return renderer_->GetScreenWidth();
 }
 
 int Engine::GetScreenHeight() const {
-  return renderer_->screen_height();
+  return renderer_->GetScreenHeight();
 }
 
 int Engine::GetDeviceDpi() const {
@@ -470,7 +459,7 @@ int Engine::GetDeviceDpi() const {
 }
 
 float Engine::GetImageScaleFactor() const {
-  float width_inch = static_cast<float>(renderer_->screen_width()) /
+  float width_inch = static_cast<float>(renderer_->GetScreenWidth()) /
                      static_cast<float>(platform_->GetDeviceDpi());
   return 2.57143f / width_inch;
 }
@@ -504,10 +493,10 @@ void Engine::OnWindowDestroyed() {
 }
 
 void Engine::OnWindowResized(int width, int height) {
-  if (width != renderer_->screen_width() ||
-      height != renderer_->screen_height()) {
-    renderer_->Shutdown();
-    renderer_->Initialize(platform_);
+  if (width != renderer_->GetScreenWidth() ||
+      height != renderer_->GetScreenHeight()) {
+    renderer_->OnWindowResized(width, height);
+    CreateProjectionMatrix();
   }
 }
 
@@ -615,6 +604,20 @@ void Engine::CreateTextureCompressors() {
   }
 }
 
+void Engine::CreateProjectionMatrix() {
+  if (GetScreenWidth() > GetScreenHeight()) {
+    float aspect_ratio = (float)GetScreenWidth() / (float)GetScreenHeight();
+    LOG(0) << "aspect ratio: " << aspect_ratio;
+    screen_size_ = {aspect_ratio * 2.0f, 2.0f};
+    projection_.CreateOrthoProjection(-aspect_ratio, aspect_ratio, -1.0f, 1.0f);
+  } else {
+    float aspect_ratio = (float)GetScreenHeight() / (float)GetScreenWidth();
+    LOG(0) << "aspect_ratio: " << aspect_ratio;
+    screen_size_ = {2.0f, aspect_ratio * 2.0f};
+    projection_.CreateOrthoProjection(-1.0, 1.0, -aspect_ratio, aspect_ratio);
+  }
+}
+
 void Engine::ContextLost() {
   CreateRenderResources();
   WaitForAsyncWork();

src/engine/engine.h

@@ -239,6 +239,8 @@ class Engine : public PlatformObserver {
 
   void CreateTextureCompressors();
 
+  void CreateProjectionMatrix();
+
   void ContextLost();
 
   void CreateRenderResources();

src/engine/platform/platform_linux.cc

@@ -30,7 +30,7 @@ Platform::Platform() {
 
   XSelectInput(display_, window_,
                KeyPressMask | Button1MotionMask | ButtonPressMask |
-                   ButtonReleaseMask | FocusChangeMask);
+                   ButtonReleaseMask | FocusChangeMask | StructureNotifyMask);
   Atom WM_DELETE_WINDOW = XInternAtom(display_, "WM_DELETE_WINDOW", false);
   XSetWMProtocols(display_, window_, &WM_DELETE_WINDOW, 1);
 }
@@ -91,6 +91,10 @@ void Platform::Update() {
         should_exit_ = true;
         break;
       }
+      case ConfigureNotify: {
+        XConfigureEvent xce = e.xconfigure;
+        observer_->OnWindowResized(xce.width, xce.height);
+      }
     }
   }
 }

src/engine/renderer/opengl/renderer_opengl.cc

@@ -46,6 +46,20 @@ void RendererOpenGL::Shutdown() {
   ShutdownInternal();
 }
 
+void RendererOpenGL::OnWindowResized(int width, int height) {
+  screen_width_ = width;
+  screen_height_ = height;
+  glViewport(0, 0, screen_width_, screen_height_);
+}
+
+int RendererOpenGL::GetScreenWidth() const {
+  return screen_width_;
+}
+
+int RendererOpenGL::GetScreenHeight() const {
+  return screen_height_;
+}
+
 uint64_t RendererOpenGL::CreateGeometry(std::unique_ptr<Mesh> mesh) {
   // Verify that we have a valid layout and get the total byte size per vertex.
   GLuint vertex_size = mesh->GetVertexSize();
@@ -483,8 +497,6 @@ bool RendererOpenGL::InitCommon() {
   LOG(0) << "  etc1:  " << texture_compression_.etc1;
   LOG(0) << "  s3tc:  " << texture_compression_.s3tc;
 
-  glViewport(0, 0, screen_width_, screen_height_);
-
   glEnable(GL_BLEND);
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 

src/engine/renderer/opengl/renderer_opengl.h

@@ -25,6 +25,11 @@ class RendererOpenGL final : public Renderer {
 
   bool IsInitialzed() const final { return is_initialized_; }
 
+  void OnWindowResized(int width, int height) final;
+
+  int GetScreenWidth() const final;
+  int GetScreenHeight() const final;
+
   uint64_t CreateGeometry(std::unique_ptr<Mesh> mesh) final;
   void DestroyGeometry(uint64_t resource_id) final;
   void Draw(uint64_t resource_id) final;
@@ -109,6 +114,9 @@ class RendererOpenGL final : public Renderer {
   // Stats.
   size_t fps_ = 0;
 
+  int screen_width_ = 0;
+  int screen_height_ = 0;
+
 #if defined(__ANDROID__)
   ANativeWindow* window_;
 #elif defined(__linux__)

src/engine/renderer/opengl/renderer_opengl_linux.cc

@@ -11,11 +11,6 @@ bool RendererOpenGL::Initialize(Platform* platform) {
   display_ = platform->GetDisplay();
   window_ = platform->GetWindow();
 
-  XWindowAttributes xwa;
-  XGetWindowAttributes(display_, window_, &xwa);
-  screen_width_ = xwa.width;
-  screen_height_ = xwa.height;
-
   GLint glx_attributes[] = {GLX_RGBA, GLX_DEPTH_SIZE, 24, GLX_DOUBLEBUFFER,
                             None};
   XVisualInfo* visual_info = glXChooseVisual(display_, 0, glx_attributes);
@@ -32,6 +27,10 @@ bool RendererOpenGL::Initialize(Platform* platform) {
     return false;
   }
 
+  XWindowAttributes xwa;
+  XGetWindowAttributes(display_, window_, &xwa);
+  OnWindowResized(xwa.width, xwa.height);
+
   return InitCommon();
 }
 

src/engine/renderer/renderer.h

@@ -30,6 +30,11 @@ class Renderer {
 
   virtual bool IsInitialzed() const = 0;
 
+  virtual void OnWindowResized(int width, int height) = 0;
+
+  virtual int GetScreenWidth() const = 0;
+  virtual int GetScreenHeight() const = 0;
+
   virtual uint64_t CreateGeometry(std::unique_ptr<Mesh> mesh) = 0;
   virtual void DestroyGeometry(uint64_t resource_id) = 0;
   virtual void Draw(uint64_t resource_id) = 0;
@@ -77,9 +82,6 @@ class Renderer {
   bool SupportsDXT5() const { return texture_compression_.s3tc; }
   bool SupportsATC() const { return texture_compression_.atc; }
 
-  int screen_width() const { return screen_width_; }
-  int screen_height() const { return screen_height_; }
-
   virtual size_t GetAndResetFPS() = 0;
 
   virtual const char* GetDebugName() = 0;
@@ -106,9 +108,6 @@ class Renderer {
 
   TextureCompression texture_compression_;
 
-  int screen_width_ = 0;
-  int screen_height_ = 0;
-
   base::Closure context_lost_cb_;
 
   Renderer(const Renderer&) = delete;

src/engine/renderer/vulkan/renderer_vulkan.cc

@@ -377,6 +377,18 @@ RendererVulkan::~RendererVulkan() {
   Shutdown();
 }
 
+void RendererVulkan::OnWindowResized(int width, int height) {
+  context_.ResizeWindow(width, height);
+}
+
+int RendererVulkan::GetScreenWidth() const {
+  return context_.GetWindowWidth();
+}
+
+int RendererVulkan::GetScreenHeight() const {
+  return context_.GetWindowHeight();
+}
+
 uint64_t RendererVulkan::CreateGeometry(std::unique_ptr<Mesh> mesh) {
   auto& geometry = geometries_[++last_resource_id_] = {};
 
@@ -1915,8 +1927,8 @@ void RendererVulkan::DrawListBegin() {
   render_pass_begin.renderPass = context_.GetRenderPass();
   render_pass_begin.framebuffer = context_.GetFramebuffer();
 
-  render_pass_begin.renderArea.extent.width = screen_width_;
-  render_pass_begin.renderArea.extent.height = screen_height_;
+  render_pass_begin.renderArea.extent.width = context_.GetWindowWidth();
+  render_pass_begin.renderArea.extent.height = context_.GetWindowHeight();
   render_pass_begin.renderArea.offset.x = 0;
   render_pass_begin.renderArea.offset.y = 0;
 
@@ -1932,9 +1944,9 @@ void RendererVulkan::DrawListBegin() {
 
   VkViewport viewport;
   viewport.x = 0;
-  viewport.y = (float)screen_height_;
-  viewport.width = (float)screen_width_;
-  viewport.height = -(float)screen_height_;
+  viewport.y = (float)context_.GetWindowHeight();
+  viewport.width = (float)context_.GetWindowWidth();
+  viewport.height = -(float)context_.GetWindowHeight();
   viewport.minDepth = 0;
   viewport.maxDepth = 1.0;
 
@@ -1943,8 +1955,8 @@ void RendererVulkan::DrawListBegin() {
   VkRect2D scissor;
   scissor.offset.x = 0;
   scissor.offset.y = 0;
-  scissor.extent.width = screen_width_;
-  scissor.extent.height = screen_height_;
+  scissor.extent.width = context_.GetWindowWidth();
+  scissor.extent.height = context_.GetWindowHeight();
 
   vkCmdSetScissor(command_buffer, 0, 1, &scissor);
 }

src/engine/renderer/vulkan/renderer_vulkan.h

@@ -28,6 +28,11 @@ class RendererVulkan final : public Renderer {
 
   bool IsInitialzed() const final { return device_ != VK_NULL_HANDLE; }
 
+  void OnWindowResized(int width, int height) final;
+
+  int GetScreenWidth() const final;
+  int GetScreenHeight() const final;
+
   uint64_t CreateGeometry(std::unique_ptr<Mesh> mesh) final;
   void DestroyGeometry(uint64_t resource_id) final;
   void Draw(uint64_t resource_id) final;

src/engine/renderer/vulkan/renderer_vulkan_android.cc

@@ -10,15 +10,14 @@ namespace eng {
 bool RendererVulkan::Initialize(Platform* platform) {
   LOG(0) << "Initializing renderer.";
 
-  screen_width_ = ANativeWindow_getWidth(platform->GetWindow());
-  screen_height_ = ANativeWindow_getHeight(platform->GetWindow());
+  int width = ANativeWindow_getWidth(platform->GetWindow());
+  int height = ANativeWindow_getHeight(platform->GetWindow());
 
   if (!context_.Initialize()) {
     LOG(0) << "Failed to initialize Vulkan context.";
     return false;
   }
-  if (!context_.CreateWindow(platform->GetWindow(), screen_width_,
-                             screen_height_)) {
+  if (!context_.CreateWindow(platform->GetWindow(), width, height)) {
     LOG(0) << "Vulkan context failed to create window.";
     return false;
   }

src/engine/renderer/vulkan/renderer_vulkan_linux.cc

@@ -10,15 +10,13 @@ bool RendererVulkan::Initialize(Platform* platform) {
 
   XWindowAttributes xwa;
   XGetWindowAttributes(platform->GetDisplay(), platform->GetWindow(), &xwa);
-  screen_width_ = xwa.width;
-  screen_height_ = xwa.height;
 
   if (!context_.Initialize()) {
     LOG(0) << "Failed to initialize Vulkan context.";
     return false;
   }
   if (!context_.CreateWindow(platform->GetDisplay(), platform->GetWindow(),
-                             screen_width_, screen_height_)) {
+                             xwa.width, xwa.height)) {
     LOG(0) << "Vulkan context failed to create window.";
     return false;
   }

src/engine/renderer/vulkan/vulkan_context.h

@@ -58,8 +58,8 @@ class VulkanContext {
 
   VkPhysicalDeviceLimits GetDeviceLimits() const { return gpu_props_.limits; }
 
-  int GetWidth() { return window_.width; }
-  int GetHeight() { return window_.height; }
+  int GetWindowWidth() const { return window_.width; }
+  int GetWindowHeight() const { return window_.height; }
 
   size_t GetAndResetFPS();