From 0e0cd5e705166206835fbc081a819b18308ee186 Mon Sep 17 00:00:00 2001 From: Yaroslav Bunyak Date: Sat, 20 Sep 2014 01:48:10 +0300 Subject: [PATCH] Add support for Retina displays on MacOSX. --- examples/opengl_example/main.cpp | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/examples/opengl_example/main.cpp b/examples/opengl_example/main.cpp index 53e05399..a37d603f 100644 --- a/examples/opengl_example/main.cpp +++ b/examples/opengl_example/main.cpp @@ -10,6 +10,7 @@ static GLFWwindow* window; static GLuint fontTex; +static float content_scale[2] = {1.0f, 1.0f}; // This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure) // If text or lines are blurry when integrating ImGui in your engine: @@ -146,10 +147,15 @@ void InitGL() void InitImGui() { int w, h; + int fb_w, fb_h; glfwGetWindowSize(window, &w, &h); + glfwGetFramebufferSize(window, &fb_w, &fb_h); + + content_scale[0] = fb_w / w; + content_scale[1] = fb_h / h; ImGuiIO& io = ImGui::GetIO(); - io.DisplaySize = ImVec2((float)w, (float)h); // Display size, in pixels. For clamping windows positions. + io.DisplaySize = ImVec2((float)fb_w, (float)fb_h); // Display size, in pixels. For clamping windows positions. io.DeltaTime = 1.0f/60.0f; // Time elapsed since last frame, in seconds (in this sample app we'll override this every frame because our timestep is variable) io.PixelCenterOffset = 0.0f; // Align OpenGL texels io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array. @@ -202,7 +208,7 @@ void UpdateImGui() // (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents()) double mouse_x, mouse_y; glfwGetCursorPos(window, &mouse_x, &mouse_y); - io.MousePos = ImVec2((float)mouse_x, (float)mouse_y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.) + io.MousePos = ImVec2((float)mouse_x * content_scale[0], (float)mouse_y * content_scale[1]); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.) io.MouseDown[0] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0; io.MouseDown[1] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0;