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Diffstat (limited to '3rdparty/imgui/examples/example_apple_metal/Shared/Renderer.mm')
-rw-r--r-- | 3rdparty/imgui/examples/example_apple_metal/Shared/Renderer.mm | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/3rdparty/imgui/examples/example_apple_metal/Shared/Renderer.mm b/3rdparty/imgui/examples/example_apple_metal/Shared/Renderer.mm new file mode 100644 index 00000000..95218eae --- /dev/null +++ b/3rdparty/imgui/examples/example_apple_metal/Shared/Renderer.mm @@ -0,0 +1,132 @@ + +#import "Renderer.h" +#import <Metal/Metal.h> + +#include "imgui.h" +#include "imgui_impl_metal.h" + +#if TARGET_OS_OSX +#include "imgui_impl_osx.h" +#endif + +@interface Renderer () +@property (nonatomic, strong) id <MTLDevice> device; +@property (nonatomic, strong) id <MTLCommandQueue> commandQueue; +@end + +@implementation Renderer + +-(nonnull instancetype)initWithView:(nonnull MTKView *)view; +{ + self = [super init]; + if(self) + { + _device = view.device; + _commandQueue = [_device newCommandQueue]; + + IMGUI_CHECKVERSION(); + ImGui::CreateContext(); + (void)ImGui::GetIO(); + + ImGui_ImplMetal_Init(_device); + + ImGui::StyleColorsDark(); + } + + return self; +} + +- (void)drawInMTKView:(MTKView *)view +{ + ImGuiIO &io = ImGui::GetIO(); + io.DisplaySize.x = view.bounds.size.width; + io.DisplaySize.y = view.bounds.size.height; + +#if TARGET_OS_OSX + CGFloat framebufferScale = view.window.screen.backingScaleFactor ?: NSScreen.mainScreen.backingScaleFactor; +#else + CGFloat framebufferScale = view.window.screen.scale ?: UIScreen.mainScreen.scale; +#endif + io.DisplayFramebufferScale = ImVec2(framebufferScale, framebufferScale); + + io.DeltaTime = 1 / float(view.preferredFramesPerSecond ?: 60); + + id<MTLCommandBuffer> commandBuffer = [self.commandQueue commandBuffer]; + + static bool show_demo_window = true; + static bool show_another_window = false; + static float clear_color[4] = { 0.28f, 0.36f, 0.5f, 1.0f }; + + MTLRenderPassDescriptor *renderPassDescriptor = view.currentRenderPassDescriptor; + if (renderPassDescriptor != nil) + { + renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColorMake(clear_color[0], clear_color[1], clear_color[2], clear_color[3]); + + // Here, you could do additional rendering work, including other passes as necessary. + + id <MTLRenderCommandEncoder> renderEncoder = [commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor]; + [renderEncoder pushDebugGroup:@"ImGui demo"]; + + // Start the Dear ImGui frame + ImGui_ImplMetal_NewFrame(renderPassDescriptor); +#if TARGET_OS_OSX + ImGui_ImplOSX_NewFrame(view); +#endif + ImGui::NewFrame(); + + // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!). + if (show_demo_window) + ImGui::ShowDemoWindow(&show_demo_window); + + // 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window. + { + static float f = 0.0f; + static int counter = 0; + + ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it. + + ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too) + ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state + ImGui::Checkbox("Another Window", &show_another_window); + + ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f + ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color + + if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated) + counter++; + ImGui::SameLine(); + ImGui::Text("counter = %d", counter); + + ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate); + ImGui::End(); + } + + // 3. Show another simple window. + if (show_another_window) + { + ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked) + ImGui::Text("Hello from another window!"); + if (ImGui::Button("Close Me")) + show_another_window = false; + ImGui::End(); + } + + // Rendering + ImGui::Render(); + ImDrawData *drawData = ImGui::GetDrawData(); + ImGui_ImplMetal_RenderDrawData(drawData, commandBuffer, renderEncoder); + + [renderEncoder popDebugGroup]; + [renderEncoder endEncoding]; + + [commandBuffer presentDrawable:view.currentDrawable]; + } + + [commandBuffer commit]; +} + +- (void)mtkView:(MTKView *)view drawableSizeWillChange:(CGSize)size +{ +} + +@end |