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