Abstract Session.hpp

Summary:
Abstract Session.hpp for representation samples.
Subsequent diff will attempt to use this abstraction for kit/canvas/core/imagetests separately

Reviewed By: EricGriffith

Differential Revision: D47821260

fbshipit-source-id: ebe7cf617f66ba0b5f3ba722a58d2f83c471b03d

shell/mac/ViewController.mm

@@ -123,6 +123,8 @@ - (void)render {
           : igl::SurfaceTextures{[self createTextureFromNativeDrawable],
                                  [self createTextureFromNativeDepth]};
   IGL_ASSERT(surfaceTextures.color != nullptr && surfaceTextures.depth != nullptr);
+  const auto& dims = surfaceTextures.color->getDimensions();
+  shellParams_.nativeSurfaceDimensions = glm::ivec2{dims.width, dims.height};
   session_->update(std::move(surfaceTextures));
   if (session_->appParams().exitRequested)
     [[NSApplication sharedApplication] terminate:nil];
@@ -316,6 +318,8 @@ - (void)loadView {
 
   session_ = igl::shell::createDefaultRenderSession(shellPlatform_);
   IGL_ASSERT_MSG(session_, "createDefaultRenderSession() must return a valid session");
+  // Get initial native surface dimensions
+  shellParams_.nativeSurfaceDimensions = glm::ivec2(2048, 1536);
   session_->initialize();
 }
 

shell/shared/renderSession/ShellParams.h

@@ -19,6 +19,7 @@ struct ShellParams {
   RenderMode renderMode = RenderMode::Mono;
   bool shellControlsViewParams = false;
   glm::vec2 viewportSize = glm::vec2(1024.0f, 768.0f);
+  glm::ivec2 nativeSurfaceDimensions = glm::ivec2(2048, 1536);
   igl::TextureFormat defaultColorFramebufferFormat = igl::TextureFormat::BGRA_SRGB;
   float viewportScale = 1.f;
 };