Merge branch 'warrenm_osx'

This commit is contained in:
Omar Cornut 2018-07-08 10:47:55 +02:00
commit 839e4d34bd
25 changed files with 2557 additions and 8 deletions

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@ -47,6 +47,10 @@ Other Changes:
- Misc: Added ImGuiMouseCursor_Hand cursor enum + corresponding software cursor. (#1913, 1914) [@aiekick, @ocornut]
- Misc: Tweaked software mouse cursor offset to match the offset of the corresponding Windows 10 cursors.
- Fixed a include build issue for Cygwin in non-POSIX (Win32) mode. (#1917, #1319, #276)
- Examples: Metal: Added Metal rendering backend. (#1929, #1873) [@warrenm]
- Examples: OSX: Added early raw OSX platform backend. (#1873) [@pagghiu, @itamago, @ocornut]
- Examples: Added mac OSX & iOS + Metal example in example_apple_metal/. (#1929, #1873) [@warrenm]
- Examples: Added mac OSX + OpenGL2 example in example_apple_opengl2/. (#1873)
- Examples: Win32, Glfw, SDL: Added support for the ImGuiMouseCursor_Hand cursor.
@ -99,6 +103,7 @@ Other Changes:
- SliderFloat(): When using keyboard/gamepad and a zero precision format string (e.g. "%.0f"), always step in integer units. (#1866)
- ImFontConfig: Added GlyphMinAdvanceX/GlyphMaxAdvanceX settings useful to make a font appears monospaced, particularly useful for icon fonts. (#1869)
- ImFontAtlas: Added GetGlyphRangesChineseSimplifiedCommon() helper that returns a list of ~2500 most common Simplified Chinese characters. (#1859) [@JX-Master, @ocornut]
- Examples: OSX: Added imgui_impl_osx.mm binding to be used along with e.g. imgui_impl_opengl2.cpp. (#281, #1870) [@pagghiu, @itamago, @ocornut]
- Examples: GLFW: Made it possible to Shutdown/Init the backend again (by reseting the time storage properly). (#1827) [@ice1000]
- Examples: Win32: Fixed handling of mouse wheel messages to support sub-unit scrolling messages (typically sent by track-pads). (#1874) [@zx64]
- Examples: SDL+Vulkan: Added SDL+Vulkan example.

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@ -125,10 +125,9 @@ Languages: (third-party bindings)
- Swift [swift-imgui](https://github.com/mnmly/Swift-imgui)
Frameworks:
- Renderers: DirectX 9, DirectX 10, DirectX 11, DirectX 12, OpenGL2, OpenGL3+, Vulkan: [examples/](https://github.com/ocornut/imgui/tree/master/examples)
- Platform: GLFW, SDL, Win32, Freeglut: [examples/](https://github.com/ocornut/imgui/tree/master/examples)
- Renderers: DirectX 9, DirectX 10, DirectX 11, DirectX 12, Metal, OpenGL2, OpenGL3+, Vulkan: [examples/](https://github.com/ocornut/imgui/tree/master/examples)
- Platform: GLFW, SDL, Win32, OSX, Freeglut: [examples/](https://github.com/ocornut/imgui/tree/master/examples)
- Framework: Allegro 5, Marmalade: [examples/](https://github.com/ocornut/imgui/tree/master/examples)
- Unmerged Branch: OSX platform without GLFW/SDL: [#1873](https://github.com/ocornut/imgui/tree/osx)
- Unmerged PR: SDL2 + OpenGLES + Emscripten: [#336](https://github.com/ocornut/imgui/pull/336)
- Unmerged PR: Native Win32 and OSX: [#281](https://github.com/ocornut/imgui/pull/281)
- Unmerged PR: Android: [#421](https://github.com/ocornut/imgui/pull/421)
@ -170,6 +169,7 @@ User screenshots:
<br>[Gallery Part 4](https://github.com/ocornut/imgui/issues/973) (Jan 2017 to Aug 2017)
<br>[Gallery Part 5](https://github.com/ocornut/imgui/issues/1269) (Aug 2017 to Feb 2018)
<br>[Gallery Part 6](https://github.com/ocornut/imgui/issues/1607) (Feb 2018 onward)
<br>[Gallery Part 6](https://github.com/ocornut/imgui/issues/1902) (June 2018 onward)
<br>Also see the [Mega screenshots](https://github.com/ocornut/imgui/issues/1273) for an idea of the available features.
Various tools

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@ -103,6 +103,7 @@ Most the example bindings are split in 2 parts:
List of Platforms Bindings in this repository:
imgui_impl_glfw.cpp ; GLFW (Windows, macOS, Linux, etc.) http://www.glfw.org/
imgui_impl_osx.mm ; macOS native API
imgui_impl_sdl.cpp ; SDL2 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org
imgui_impl_win32.cpp ; Windows native API (Windows)
imgui_impl_freeglut.cpp ; FreeGLUT (if you really miss the 90's)
@ -112,7 +113,8 @@ List of Renderer Bindings in this repository:
imgui_impl_dx9.cpp ; DirectX9
imgui_impl_dx10.cpp ; DirectX10
imgui_impl_dx11.cpp ; DirectX11
imgui_impl_dx12.cpp ; DirectX12
imgui_impl_dx12.cpp ; DirectX12
imgui_impl_metal.mm ; Metal (with ObjC)
imgui_impl_opengl2.cpp ; OpenGL2 (legacy, fixed pipeline <- don't use with modern OpenGL context)
imgui_impl_opengl3.cpp ; OpenGL3 (modern programmable pipeline)
imgui_impl_vulkan.cpp ; Vulkan
@ -143,6 +145,7 @@ Building:
- Makefiles for Linux/OSX
- Batch files for Visual Studio 2008+
- A .sln project file for Visual Studio 2010+
- Xcode project files for the Apple examples
Please let me know if they don't work with your setup!
You can probably just import the imgui_impl_xxx.cpp/.h files into your own codebase or compile those
directly with a command-line compiler.
@ -207,10 +210,19 @@ example_sdl_vulkan/
This is quite long and tedious, because: Vulkan.
= main.cpp + imgui_impl_sdl.cpp + imgui_impl_vulkan.cpp
example_apple_metal/
OSX & iOS + Metal.
It is based on the cross-platform game template provided with Xcode as of Xcode 9.
= game template + imgui_impl_osx.mm + imgui_impl_metal.mm
example_apple_opengl2/
OSX Cocoa + OpenGL2.
= main.mm + imgui_impl_osx.mm + imgui_impl_opengl2.cpp
example_apple/
OSX & iOS example + OpenGL2.
THIS EXAMPLE HAS NOT BEEN MAINTAINED PROPERLY AND NEEDS A MAINTAINER.
Consider using the example_glfw_opengl3/ instead.
Consider using the example_glfw_opengl3/ or example_osx_opengl2/ example instead.
On iOS, Using Synergy to access keyboard/mouse data from server computer.
Synergy keyboard integration is rather hacky.

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@ -1,3 +0,0 @@
.DS_Store
imguiex.xcodeproj/project.xcworkspace/
imguiex.xcodeproj/xcuserdata/

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@ -0,0 +1,6 @@
# iOS / OSX Metal example
## Introduction
This example shows how to render ImGui with Metal. It is based on the cross-platform game template provided with Xcode as of Xcode 9.

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@ -0,0 +1,19 @@
#import <TargetConditionals.h>
#if TARGET_OS_IPHONE
#import <UIKit/UIKit.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@end
#else
#import <Cocoa/Cocoa.h>
@interface AppDelegate : NSObject <NSApplicationDelegate>
@end
#endif

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@ -0,0 +1,12 @@
#import "AppDelegate.h"
@implementation AppDelegate
#if TARGET_OS_OSX
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender {
return YES;
}
#endif
@end

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@ -0,0 +1,9 @@
#import <MetalKit/MetalKit.h>
@interface Renderer : NSObject <MTKViewDelegate>
-(nonnull instancetype)initWithView:(nonnull MTKView *)view;
@end

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@ -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:@"Draw ImGui"];
ImGui_ImplMetal_NewFrame(renderPassDescriptor);
#if TARGET_OS_OSX
ImGui_ImplOSX_NewFrame(view);
#endif
ImGui::NewFrame();
{
static float f = 0.0f;
static int counter = 0;
ImGui::Text("Hello, world!"); // Display some text (you can use a format string too)
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
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our windows open/close state
ImGui::Checkbox("Another Window", &show_another_window);
if (ImGui::Button("Button")) // Buttons return true when clicked (NB: 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);
}
// 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
if (show_another_window)
{
ImGui::Begin("Another Window", &show_another_window);
ImGui::Text("Hello from another window!");
if (ImGui::Button("Close Me"))
show_another_window = false;
ImGui::End();
}
// 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
if (show_demo_window)
{
// Normally user code doesn't need/want to call this because positions are saved in .ini file anyway.
// Here we just want to make the demo initial state a bit more friendly!
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver);
ImGui::ShowDemoWindow(&show_demo_window);
}
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

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@ -0,0 +1,20 @@
#import <Metal/Metal.h>
#import <MetalKit/MetalKit.h>
#import "Renderer.h"
#if TARGET_OS_IPHONE
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
@end
#else
#import <Cocoa/Cocoa.h>
@interface ViewController : NSViewController
@end
#endif

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@ -0,0 +1,130 @@
#import "ViewController.h"
#import "Renderer.h"
#include "imgui.h"
#if TARGET_OS_OSX
#include "imgui_impl_osx.h"
#endif
@interface ViewController ()
@property (nonatomic, readonly) MTKView *mtkView;
@property (nonatomic, strong) Renderer *renderer;
@end
@implementation ViewController
- (MTKView *)mtkView {
return (MTKView *)self.view;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.mtkView.device = MTLCreateSystemDefaultDevice();
if (!self.mtkView.device) {
NSLog(@"Metal is not supported");
abort();
}
self.renderer = [[Renderer alloc] initWithView:self.mtkView];
[self.renderer mtkView:self.mtkView drawableSizeWillChange:self.mtkView.bounds.size];
self.mtkView.delegate = self.renderer;
#if TARGET_OS_OSX
// Add a tracking area in order to receive mouse events whenever the mouse is within the bounds of our view
NSTrackingArea *trackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect
options:NSTrackingMouseMoved | NSTrackingInVisibleRect | NSTrackingActiveAlways
owner:self
userInfo:nil];
[self.view addTrackingArea:trackingArea];
// If we want to receive key events, we either need to be in the responder chain of the key view,
// or else we can install a local monitor. The consequence of this heavy-handed approach is that
// we receive events for all controls, not just ImGui widgets. If we had native controls in our
// window, we'd want to be much more careful than just ingesting the complete event stream, though
// we do make an effort to be good citizens by passing along events when ImGui doesn't want to capture.
NSEventMask eventMask = NSEventMaskKeyDown | NSEventMaskKeyUp | NSEventMaskFlagsChanged | NSEventTypeScrollWheel;
[NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event) {
BOOL wantsCapture = ImGui_ImplOSX_HandleEvent(event, self.view);
if (event.type == NSEventTypeKeyDown && wantsCapture) {
return nil;
} else {
return event;
}
}];
ImGui_ImplOSX_Init();
#endif
}
#if TARGET_OS_OSX
- (void)mouseMoved:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)mouseDown:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)mouseUp:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)mouseDragged:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)scrollWheel:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
#elif TARGET_OS_IOS
// This touch mapping is super cheesy/hacky. We treat any touch on the screen
// as if it were a depressed left mouse button, and we don't bother handling
// multitouch correctly at all. This causes the "cursor" to behave very erratically
// when there are multiple active touches. But for demo purposes, single-touch
// interaction actually works surprisingly well.
- (void)updateIOWithTouchEvent:(UIEvent *)event {
UITouch *anyTouch = event.allTouches.anyObject;
CGPoint touchLocation = [anyTouch locationInView:self.view];
ImGuiIO &io = ImGui::GetIO();
io.MousePos = ImVec2(touchLocation.x, touchLocation.y);
BOOL hasActiveTouch = NO;
for (UITouch *touch in event.allTouches) {
if (touch.phase != UITouchPhaseEnded && touch.phase != UITouchPhaseCancelled) {
hasActiveTouch = YES;
break;
}
}
io.MouseDown[0] = hasActiveTouch;
}
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
[self updateIOWithTouchEvent:event];
}
- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
[self updateIOWithTouchEvent:event];
}
- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
[self updateIOWithTouchEvent:event];
}
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
[self updateIOWithTouchEvent:event];
}
#endif
@end

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@ -0,0 +1,23 @@
#import <TargetConditionals.h>
#if TARGET_OS_IPHONE
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
int main(int argc, char * argv[]) {
@autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
}
#else
#import <Cocoa/Cocoa.h>
int main(int argc, const char * argv[]) {
return NSApplicationMain(argc, argv);
}
#endif

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@ -0,0 +1,541 @@
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ENABLE_NS_ASSERTIONS = NO;
ENABLE_STRICT_OBJC_MSGSEND = YES;
GCC_C_LANGUAGE_STANDARD = gnu11;
GCC_NO_COMMON_BLOCKS = YES;
GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
GCC_WARN_UNDECLARED_SELECTOR = YES;
GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
MACOSX_DEPLOYMENT_TARGET = 10.13;
MTL_ENABLE_DEBUG_INFO = NO;
SDKROOT = macosx;
};
name = Release;
};
4080A97320B029B00036BA46 /* Debug */ = {
isa = XCBuildConfiguration;
buildSettings = {
CODE_SIGN_STYLE = Automatic;
PRODUCT_NAME = "$(TARGET_NAME)";
SYSTEM_HEADER_SEARCH_PATHS = ../libs/gl3w;
USER_HEADER_SEARCH_PATHS = ../..;
};
name = Debug;
};
4080A97420B029B00036BA46 /* Release */ = {
isa = XCBuildConfiguration;
buildSettings = {
CODE_SIGN_STYLE = Automatic;
PRODUCT_NAME = "$(TARGET_NAME)";
SYSTEM_HEADER_SEARCH_PATHS = ../libs/gl3w;
USER_HEADER_SEARCH_PATHS = ../..;
};
name = Release;
};
/* End XCBuildConfiguration section */
/* Begin XCConfigurationList section */
4080A96620B029B00036BA46 /* Build configuration list for PBXProject "example_osx_opengl2" */ = {
isa = XCConfigurationList;
buildConfigurations = (
4080A97020B029B00036BA46 /* Debug */,
4080A97120B029B00036BA46 /* Release */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
4080A97220B029B00036BA46 /* Build configuration list for PBXNativeTarget "example_osx_opengl2" */ = {
isa = XCConfigurationList;
buildConfigurations = (
4080A97320B029B00036BA46 /* Debug */,
4080A97420B029B00036BA46 /* Release */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
/* End XCConfigurationList section */
};
rootObject = 4080A96320B029B00036BA46 /* Project object */;
}

View File

@ -0,0 +1,280 @@
// ImGui - standalone example application for OSX + OpenGL2, using legacy fixed pipeline
// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
#include "imgui.h"
#include "../imgui_impl_osx.h"
#include "../imgui_impl_opengl2.h"
#include <stdio.h>
#import <Cocoa/Cocoa.h>
#import <OpenGL/gl.h>
#import <OpenGL/glu.h>
//-----------------------------------------------------------------------------------
// ImGuiExampleView
//-----------------------------------------------------------------------------------
@interface ImGuiExampleView : NSOpenGLView
{
NSTimer* animationTimer;
}
@end
@implementation ImGuiExampleView
-(void)animationTimerFired:(NSTimer*)timer
{
[self setNeedsDisplay:YES];
}
-(void)prepareOpenGL
{
[super prepareOpenGL];
#ifndef DEBUG
GLint swapInterval = 1;
[[self openGLContext] setValues:&swapInterval forParameter:NSOpenGLCPSwapInterval];
if (swapInterval == 0)
NSLog(@"Error: Cannot set swap interval.");
#endif
}
-(void)updateAndDrawDemoView
{
ImGui_ImplOpenGL2_NewFrame();
ImGui_ImplOSX_NewFrame(self);
ImGui::NewFrame();
// Global data for the demo
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 1. Show a simple window.
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
{
static float f = 0.0f;
static int counter = 0;
ImGui::Text("Hello, world!"); // Display some text (you can use a format string too)
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
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our windows open/close state
ImGui::Checkbox("Another Window", &show_another_window);
if (ImGui::Button("Button")) // Buttons return true when clicked (NB: 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);
}
// 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
if (show_another_window)
{
ImGui::Begin("Another Window", &show_another_window);
ImGui::Text("Hello from another window!");
if (ImGui::Button("Close Me"))
show_another_window = false;
ImGui::End();
}
// 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
if (show_demo_window)
{
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
ImGui::ShowDemoWindow(&show_demo_window);
}
// Rendering
ImGui::Render();
[[self openGLContext] makeCurrentContext];
ImGuiIO& io = ImGui::GetIO();
GLsizei width = (GLsizei)(io.DisplaySize.x * io.DisplayFramebufferScale.x);
GLsizei height = (GLsizei)(io.DisplaySize.y * io.DisplayFramebufferScale.y);
glViewport(0, 0, width, height);
glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL2_RenderDrawData(ImGui::GetDrawData());
// Present
[[self openGLContext] flushBuffer];
if (!animationTimer)
animationTimer = [NSTimer scheduledTimerWithTimeInterval:0.017 target:self selector:@selector(animationTimerFired:) userInfo:nil repeats:YES];
}
-(void)reshape
{
[[self openGLContext] update];
[self updateAndDrawDemoView];
}
-(void)drawRect:(NSRect)bounds
{
[self updateAndDrawDemoView];
}
-(BOOL)acceptsFirstResponder
{
return (YES);
}
-(BOOL)becomeFirstResponder
{
return (YES);
}
-(BOOL)resignFirstResponder
{
return (YES);
}
// Flip coordinate system upside down on Y
-(BOOL)isFlipped
{
return (YES);
}
-(void)dealloc
{
animationTimer = nil;
}
// Forward Mouse/Keyboard events to dear imgui OSX back-end. It returns true when imgui is expecting to use the event.
-(void)keyUp:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); }
-(void)keyDown:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); }
-(void)flagsChanged:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); }
-(void)mouseDown:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); }
-(void)mouseUp:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); }
-(void)scrollWheel:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); }
@end
//-----------------------------------------------------------------------------------
// ImGuiExampleAppDelegate
//-----------------------------------------------------------------------------------
@interface ImGuiExampleAppDelegate : NSObject <NSApplicationDelegate>
@property (nonatomic, readonly) NSWindow* window;
@end
@implementation ImGuiExampleAppDelegate
@synthesize window = _window;
-(BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)theApplication
{
return YES;
}
-(NSWindow*)window
{
if (_window != nil)
return (_window);
NSRect viewRect = NSMakeRect(100.0, 100.0, 100.0 + 1280.0, 100 + 720.0);
_window = [[NSWindow alloc] initWithContentRect:viewRect styleMask:NSWindowStyleMaskTitled|NSWindowStyleMaskMiniaturizable|NSWindowStyleMaskResizable|NSWindowStyleMaskClosable backing:NSBackingStoreBuffered defer:YES];
[_window setTitle:@"ImGui OSX+OpenGL2 Example"];
[_window setOpaque:YES];
[_window makeKeyAndOrderFront:NSApp];
return (_window);
}
-(void)setupMenu
{
NSMenu* mainMenuBar = [[NSMenu alloc] init];
NSMenu* appMenu;
NSMenuItem* menuItem;
appMenu = [[NSMenu alloc] initWithTitle:@"ImGui OSX+OpenGL2 Example"];
menuItem = [appMenu addItemWithTitle:@"Quit ImGui OSX+OpenGL2 Example" action:@selector(terminate:) keyEquivalent:@"q"];
[menuItem setKeyEquivalentModifierMask:NSEventModifierFlagCommand];
menuItem = [[NSMenuItem alloc] init];
[menuItem setSubmenu:appMenu];
[mainMenuBar addItem:menuItem];
appMenu = nil;
[NSApp setMainMenu:mainMenuBar];
}
-(void)dealloc
{
_window = nil;
}
-(void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// Make the application a foreground application (else it won't receive keyboard events)
ProcessSerialNumber psn = {0, kCurrentProcess};
TransformProcessType(&psn, kProcessTransformToForegroundApplication);
// Menu
[self setupMenu];
NSOpenGLPixelFormatAttribute attrs[] =
{
NSOpenGLPFADoubleBuffer,
NSOpenGLPFADepthSize, 32,
0
};
NSOpenGLPixelFormat* format = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];
ImGuiExampleView* view = [[ImGuiExampleView alloc] initWithFrame:self.window.frame pixelFormat:format];
format = nil;
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_6)
[view setWantsBestResolutionOpenGLSurface:YES];
#endif // MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
[self.window setContentView:view];
if ([view openGLContext] == nil)
NSLog(@"No OpenGL Context!");
// Setup Dear ImGui binding
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
ImGui_ImplOSX_Init();
ImGui_ImplOpenGL2_Init();
// Setup style
ImGui::StyleColorsDark();
//ImGui::StyleColorsClassic();
// Load Fonts
// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
// - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
// - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
// - Read 'misc/fonts/README.txt' for more instructions and details.
// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
//io.Fonts->AddFontDefault();
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
}
@end
int main(int argc, const char* argv[])
{
@autoreleasepool
{
NSApp = [NSApplication sharedApplication];
ImGuiExampleAppDelegate* delegate = [[ImGuiExampleAppDelegate alloc] init];
[[NSApplication sharedApplication] setDelegate:delegate];
[NSApp run];
}
return NSApplicationMain(argc, argv);
}

View File

@ -0,0 +1,25 @@
// ImGui Renderer for: Metal
// This needs to be used along with a Platform Binding (e.g. OSX)
// Implemented features:
// [X] Renderer: User texture binding. Use 'MTLTexture' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui
@class MTLRenderPassDescriptor;
@protocol MTLDevice, MTLCommandBuffer, MTLRenderCommandEncoder;
IMGUI_IMPL_API bool ImGui_ImplMetal_Init(id<MTLDevice> device);
IMGUI_IMPL_API void ImGui_ImplMetal_Shutdown();
IMGUI_IMPL_API void ImGui_ImplMetal_NewFrame(MTLRenderPassDescriptor *renderPassDescriptor);
IMGUI_IMPL_API void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data,
id<MTLCommandBuffer> commandBuffer,
id<MTLRenderCommandEncoder> commandEncoder);
// Called by Init/NewFrame/Shutdown
IMGUI_IMPL_API bool ImGui_ImplMetal_CreateFontsTexture(id<MTLDevice> device);
IMGUI_IMPL_API void ImGui_ImplMetal_DestroyFontsTexture();
IMGUI_IMPL_API bool ImGui_ImplMetal_CreateDeviceObjects(id<MTLDevice> device);
IMGUI_IMPL_API void ImGui_ImplMetal_DestroyDeviceObjects();

View File

@ -0,0 +1,490 @@
// ImGui Renderer for: Metal
// This needs to be used along with a Platform Binding (e.g. OSX)
// Implemented features:
// [X] Renderer: User texture binding. Use 'MTLTexture' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2018-07-05: Metal: Added new Metal backend implementation.
#include "imgui.h"
#include "imgui_impl_metal.h"
#import <Metal/Metal.h>
#import <QuartzCore/CAMetalLayer.h>
#import <simd/simd.h>
#pragma mark - Support classes
// A wrapper around a MTLBuffer object that knows the last time it was reused
@interface MetalBuffer : NSObject
@property (nonatomic, strong) id<MTLBuffer> buffer;
@property (nonatomic, assign) NSTimeInterval lastReuseTime;
- (instancetype)initWithBuffer:(id<MTLBuffer>)buffer;
@end
// An object that encapsulates the data necessary to uniquely identify a
// render pipeline state. These are used as cache keys.
@interface FramebufferDescriptor : NSObject<NSCopying>
@property (nonatomic, assign) unsigned long sampleCount;
@property (nonatomic, assign) MTLPixelFormat colorPixelFormat;
@property (nonatomic, assign) MTLPixelFormat depthPixelFormat;
@property (nonatomic, assign) MTLPixelFormat stencilPixelFormat;
- (instancetype)initWithRenderPassDescriptor:(MTLRenderPassDescriptor *)renderPassDescriptor;
@end
// A singleton that stores long-lived objects that are needed by the Metal
// renderer backend. Stores the render pipeline state cache and the default
// font texture, and manages the reusable buffer cache.
@interface MetalContext : NSObject
@property (nonatomic, strong) id<MTLDepthStencilState> depthStencilState;
@property (nonatomic, strong) FramebufferDescriptor *framebufferDescriptor; // framebuffer descriptor for current frame; transient
@property (nonatomic, strong) NSMutableDictionary *renderPipelineStateCache; // pipeline cache; keyed on framebuffer descriptors
@property (nonatomic, strong, nullable) id<MTLTexture> fontTexture;
@property (nonatomic, strong) NSMutableArray<MetalBuffer *> *bufferCache;
@property (nonatomic, assign) NSTimeInterval lastBufferCachePurge;
- (void)makeDeviceObjectsWithDevice:(id<MTLDevice>)device;
- (void)makeFontTextureWithDevice:(id<MTLDevice>)device;
- (MetalBuffer *)dequeueReusableBufferOfLength:(NSUInteger)length device:(id<MTLDevice>)device;
- (void)enqueueReusableBuffer:(MetalBuffer *)buffer;
- (id<MTLRenderPipelineState>)renderPipelineStateForFrameAndDevice:(id<MTLDevice>)device;
- (void)emptyRenderPipelineStateCache;
- (void)renderDrawData:(ImDrawData *)drawData
commandBuffer:(id<MTLCommandBuffer>)commandBuffer
commandEncoder:(id<MTLRenderCommandEncoder>)commandEncoder;
@end
static MetalContext *g_sharedMetalContext = nil;
#pragma mark - ImGui API implementation
bool ImGui_ImplMetal_Init(id<MTLDevice> device)
{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
g_sharedMetalContext = [[MetalContext alloc] init];
});
ImGui_ImplMetal_CreateDeviceObjects(device);
return true;
}
void ImGui_ImplMetal_Shutdown()
{
ImGui_ImplMetal_DestroyDeviceObjects();
}
void ImGui_ImplMetal_NewFrame(MTLRenderPassDescriptor *renderPassDescriptor)
{
IM_ASSERT(g_sharedMetalContext != nil && "No Metal context. Did you call ImGui_ImplMetal_Init?");
g_sharedMetalContext.framebufferDescriptor = [[FramebufferDescriptor alloc] initWithRenderPassDescriptor:renderPassDescriptor];
}
// Metal Render function.
void ImGui_ImplMetal_RenderDrawData(ImDrawData* draw_data, id<MTLCommandBuffer> commandBuffer, id<MTLRenderCommandEncoder> commandEncoder)
{
[g_sharedMetalContext renderDrawData:draw_data commandBuffer:commandBuffer commandEncoder:commandEncoder];
}
bool ImGui_ImplMetal_CreateFontsTexture(id<MTLDevice> device)
{
[g_sharedMetalContext makeFontTextureWithDevice:device];
ImGuiIO& io = ImGui::GetIO();
io.Fonts->TexID = (__bridge void *)g_sharedMetalContext.fontTexture;
return (g_sharedMetalContext.fontTexture != nil);
}
void ImGui_ImplMetal_DestroyFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
g_sharedMetalContext.fontTexture = nil;
io.Fonts->TexID = nullptr;
}
bool ImGui_ImplMetal_CreateDeviceObjects(id<MTLDevice> device)
{
[g_sharedMetalContext makeDeviceObjectsWithDevice:device];
ImGui_ImplMetal_CreateFontsTexture(device);
return true;
}
void ImGui_ImplMetal_DestroyDeviceObjects()
{
ImGui_ImplMetal_DestroyFontsTexture();
[g_sharedMetalContext emptyRenderPipelineStateCache];
}
#pragma mark - MetalBuffer implementation
@implementation MetalBuffer
- (instancetype)initWithBuffer:(id<MTLBuffer>)buffer {
if ((self = [super init])) {
_buffer = buffer;
_lastReuseTime = [NSDate date].timeIntervalSince1970;
}
return self;
}
@end
#pragma mark - FramebufferDescriptor implementation
@implementation FramebufferDescriptor
- (instancetype)initWithRenderPassDescriptor:(MTLRenderPassDescriptor *)renderPassDescriptor {
if ((self = [super init])) {
_sampleCount = renderPassDescriptor.colorAttachments[0].texture.sampleCount;
_colorPixelFormat = renderPassDescriptor.colorAttachments[0].texture.pixelFormat;
_depthPixelFormat = renderPassDescriptor.depthAttachment.texture.pixelFormat;
_stencilPixelFormat = renderPassDescriptor.stencilAttachment.texture.pixelFormat;
}
return self;
}
- (nonnull id)copyWithZone:(nullable NSZone *)zone {
FramebufferDescriptor *copy = [[FramebufferDescriptor allocWithZone:zone] init];
copy.sampleCount = self.sampleCount;
copy.colorPixelFormat = self.colorPixelFormat;
copy.depthPixelFormat = self.depthPixelFormat;
copy.stencilPixelFormat = self.stencilPixelFormat;
return copy;
}
- (NSUInteger)hash {
NSUInteger sc = _sampleCount & 0x3;
NSUInteger cf = _colorPixelFormat & 0x3FF;
NSUInteger df = _depthPixelFormat & 0x3FF;
NSUInteger sf = _stencilPixelFormat & 0x3FF;
NSUInteger hash = (sf << 22) | (df << 12) | (cf << 2) | sc;
return hash;
}
- (BOOL)isEqual:(id)object {
FramebufferDescriptor *other = object;
if (![other isKindOfClass:[FramebufferDescriptor class]]) {
return NO;
}
return other.sampleCount == self.sampleCount &&
other.colorPixelFormat == self.colorPixelFormat &&
other.depthPixelFormat == self.depthPixelFormat &&
other.stencilPixelFormat == self.stencilPixelFormat;
}
@end
#pragma mark - MetalContext implementation
@implementation MetalContext
- (instancetype)init {
if ((self = [super init])) {
_renderPipelineStateCache = [NSMutableDictionary dictionary];
_bufferCache = [NSMutableArray array];
_lastBufferCachePurge = [NSDate date].timeIntervalSince1970;
}
return self;
}
- (void)makeDeviceObjectsWithDevice:(id<MTLDevice>)device {
MTLDepthStencilDescriptor *depthStencilDescriptor = [[MTLDepthStencilDescriptor alloc] init];
depthStencilDescriptor.depthWriteEnabled = NO;
depthStencilDescriptor.depthCompareFunction = MTLCompareFunctionAlways;
self.depthStencilState = [device newDepthStencilStateWithDescriptor:depthStencilDescriptor];
}
- (void)makeFontTextureWithDevice:(id<MTLDevice>)device {
ImGuiIO &io = ImGui::GetIO();
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
MTLTextureDescriptor *textureDescriptor = [MTLTextureDescriptor texture2DDescriptorWithPixelFormat:MTLPixelFormatRGBA8Unorm
width:width
height:height
mipmapped:NO];
textureDescriptor.usage = MTLTextureUsageShaderRead;
#if TARGET_OS_OSX
textureDescriptor.storageMode = MTLStorageModeManaged;
#else
textureDescriptor.storageMode = MTLStorageModeShared;
#endif
id <MTLTexture> texture = [device newTextureWithDescriptor:textureDescriptor];
[texture replaceRegion:MTLRegionMake2D(0, 0, width, height) mipmapLevel:0 withBytes:pixels bytesPerRow:width * 4];
self.fontTexture = texture;
}
- (MetalBuffer *)dequeueReusableBufferOfLength:(NSUInteger)length device:(id<MTLDevice>)device {
NSTimeInterval now = [NSDate date].timeIntervalSince1970;
// Purge old buffers that haven't been useful for a while
if (now - self.lastBufferCachePurge > 1.0) {
NSMutableArray *survivors = [NSMutableArray array];
for (MetalBuffer *candidate in self.bufferCache) {
if (candidate.lastReuseTime > self.lastBufferCachePurge) {
[survivors addObject:candidate];
}
}
self.bufferCache = [survivors mutableCopy];
self.lastBufferCachePurge = now;
}
// See if we have a buffer we can reuse
MetalBuffer *bestCandidate = nil;
for (MetalBuffer *candidate in self.bufferCache) {
if (candidate.buffer.length >= length && (bestCandidate == nil || bestCandidate.lastReuseTime > candidate.lastReuseTime)) {
bestCandidate = candidate;
}
}
if (bestCandidate != nil) {
[self.bufferCache removeObject:bestCandidate];
bestCandidate.lastReuseTime = now;
return bestCandidate;
}
// No luck; make a new buffer
id<MTLBuffer> backing = [device newBufferWithLength:length options:MTLResourceStorageModeShared];
return [[MetalBuffer alloc] initWithBuffer:backing];
}
- (void)enqueueReusableBuffer:(MetalBuffer *)buffer {
[self.bufferCache addObject:buffer];
}
- (_Nullable id<MTLRenderPipelineState>)renderPipelineStateForFrameAndDevice:(id<MTLDevice>)device {
// Try to retrieve a render pipeline state that is compatible with the framebuffer config for this frame
// Thie hit rate for this cache should be very near 100%.
id<MTLRenderPipelineState> renderPipelineState = self.renderPipelineStateCache[self.framebufferDescriptor];
if (renderPipelineState == nil) {
// No luck; make a new render pipeline state
renderPipelineState = [self _renderPipelineStateForFramebufferDescriptor:self.framebufferDescriptor device:device];
// Cache render pipeline state for later reuse
self.renderPipelineStateCache[self.framebufferDescriptor] = renderPipelineState;
}
return renderPipelineState;
}
- (id<MTLRenderPipelineState>)_renderPipelineStateForFramebufferDescriptor:(FramebufferDescriptor *)descriptor device:(id<MTLDevice>)device
{
NSError *error = nil;
NSString *shaderSource = @""
"#include <metal_stdlib>\n"
"using namespace metal;\n"
"\n"
"struct Uniforms {\n"
" float4x4 projectionMatrix;\n"
"};\n"
"\n"
"struct VertexIn {\n"
" float2 position [[attribute(0)]];\n"
" float2 texCoords [[attribute(1)]];\n"
" uchar4 color [[attribute(2)]];\n"
"};\n"
"\n"
"struct VertexOut {\n"
" float4 position [[position]];\n"
" float2 texCoords;\n"
" float4 color;\n"
"};\n"
"\n"
"vertex VertexOut vertex_main(VertexIn in [[stage_in]],\n"
" constant Uniforms &uniforms [[buffer(1)]]) {\n"
" VertexOut out;\n"
" out.position = uniforms.projectionMatrix * float4(in.position, 0, 1);\n"
" out.texCoords = in.texCoords;\n"
" out.color = float4(in.color) / float4(255.0);\n"
" return out;\n"
"}\n"
"\n"
"fragment half4 fragment_main(VertexOut in [[stage_in]],\n"
" texture2d<half, access::sample> texture [[texture(0)]]) {\n"
" constexpr sampler linearSampler(coord::normalized, min_filter::linear, mag_filter::linear, mip_filter::linear);\n"
" half4 texColor = texture.sample(linearSampler, in.texCoords);\n"
" return half4(in.color) * texColor;\n"
"}\n";
id<MTLLibrary> library = [device newLibraryWithSource:shaderSource options:nil error:&error];
if (library == nil) {
NSLog(@"Error: failed to create Metal library: %@", error);
return nil;
}
id<MTLFunction> vertexFunction = [library newFunctionWithName:@"vertex_main"];
id<MTLFunction> fragmentFunction = [library newFunctionWithName:@"fragment_main"];
if (vertexFunction == nil || fragmentFunction == nil) {
NSLog(@"Error: failed to find Metal shader functions in library: %@", error);
return nil;
}
MTLVertexDescriptor *vertexDescriptor = [MTLVertexDescriptor vertexDescriptor];
vertexDescriptor.attributes[0].offset = IM_OFFSETOF(ImDrawVert, pos);
vertexDescriptor.attributes[0].format = MTLVertexFormatFloat2; // position
vertexDescriptor.attributes[0].bufferIndex = 0;
vertexDescriptor.attributes[1].offset = IM_OFFSETOF(ImDrawVert, uv);
vertexDescriptor.attributes[1].format = MTLVertexFormatFloat2; // texCoords
vertexDescriptor.attributes[1].bufferIndex = 0;
vertexDescriptor.attributes[2].offset = IM_OFFSETOF(ImDrawVert, col);
vertexDescriptor.attributes[2].format = MTLVertexFormatUChar4; // color
vertexDescriptor.attributes[2].bufferIndex = 0;
vertexDescriptor.layouts[0].stepRate = 1;
vertexDescriptor.layouts[0].stepFunction = MTLVertexStepFunctionPerVertex;
vertexDescriptor.layouts[0].stride = sizeof(ImDrawVert);
MTLRenderPipelineDescriptor *pipelineDescriptor = [[MTLRenderPipelineDescriptor alloc] init];
pipelineDescriptor.vertexFunction = vertexFunction;
pipelineDescriptor.fragmentFunction = fragmentFunction;
pipelineDescriptor.vertexDescriptor = vertexDescriptor;
pipelineDescriptor.sampleCount = self.framebufferDescriptor.sampleCount;
pipelineDescriptor.colorAttachments[0].pixelFormat = self.framebufferDescriptor.colorPixelFormat;
pipelineDescriptor.colorAttachments[0].blendingEnabled = YES;
pipelineDescriptor.colorAttachments[0].rgbBlendOperation = MTLBlendOperationAdd;
pipelineDescriptor.colorAttachments[0].alphaBlendOperation = MTLBlendOperationAdd;
pipelineDescriptor.colorAttachments[0].sourceRGBBlendFactor = MTLBlendFactorSourceAlpha;
pipelineDescriptor.colorAttachments[0].sourceAlphaBlendFactor = MTLBlendFactorSourceAlpha;
pipelineDescriptor.colorAttachments[0].destinationRGBBlendFactor = MTLBlendFactorOneMinusSourceAlpha;
pipelineDescriptor.colorAttachments[0].destinationAlphaBlendFactor = MTLBlendFactorOneMinusSourceAlpha;
pipelineDescriptor.depthAttachmentPixelFormat = self.framebufferDescriptor.depthPixelFormat;
pipelineDescriptor.stencilAttachmentPixelFormat = self.framebufferDescriptor.stencilPixelFormat;
id<MTLRenderPipelineState> renderPipelineState = [device newRenderPipelineStateWithDescriptor:pipelineDescriptor error:&error];
if (error != nil) {
NSLog(@"Error: failed to create Metal pipeline state: %@", error);
}
return renderPipelineState;
}
- (void)emptyRenderPipelineStateCache {
[self.renderPipelineStateCache removeAllObjects];
}
- (void)renderDrawData:(ImDrawData *)drawData
commandBuffer:(id<MTLCommandBuffer>)commandBuffer
commandEncoder:(id<MTLRenderCommandEncoder>)commandEncoder
{
// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
ImGuiIO &io = ImGui::GetIO();
int fb_width = (int)(drawData->DisplaySize.x * io.DisplayFramebufferScale.x);
int fb_height = (int)(drawData->DisplaySize.y * io.DisplayFramebufferScale.y);
if (fb_width <= 0 || fb_height <= 0 || drawData->CmdListsCount == 0)
return;
drawData->ScaleClipRects(io.DisplayFramebufferScale);
[commandEncoder setCullMode:MTLCullModeNone];
[commandEncoder setDepthStencilState:g_sharedMetalContext.depthStencilState];
// Setup viewport, orthographic projection matrix
// Our visible imgui space lies from draw_data->DisplayPps (top left) to
// draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayMin is typically (0,0) for single viewport apps.
MTLViewport viewport = { .originX = 0.0,
.originY = 0.0,
.width = double(fb_width),
.height = double(fb_height),
.znear = 0.0,
.zfar = 1.0 };
[commandEncoder setViewport:viewport];
float L = drawData->DisplayPos.x;
float R = drawData->DisplayPos.x + drawData->DisplaySize.x;
float T = drawData->DisplayPos.y;
float B = drawData->DisplayPos.y + drawData->DisplaySize.y;
float N = viewport.znear;
float F = viewport.zfar;
const float ortho_projection[4][4] =
{
{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f },
{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f },
{ 0.0f, 0.0f, 1/(F-N), 0.0f },
{ (R+L)/(L-R), (T+B)/(B-T), N/(F-N), 1.0f },
};
[commandEncoder setVertexBytes:&ortho_projection length:sizeof(ortho_projection) atIndex:1];
size_t vertexBufferLength = 0;
size_t indexBufferLength = 0;
for (int n = 0; n < drawData->CmdListsCount; n++) {
const ImDrawList* cmd_list = drawData->CmdLists[n];
vertexBufferLength += cmd_list->VtxBuffer.Size * sizeof(ImDrawVert);
indexBufferLength += cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx);
}
MetalBuffer *vertexBuffer = [self dequeueReusableBufferOfLength:vertexBufferLength device:commandBuffer.device];
MetalBuffer *indexBuffer = [self dequeueReusableBufferOfLength:indexBufferLength device:commandBuffer.device];
id<MTLRenderPipelineState> renderPipelineState = [self renderPipelineStateForFrameAndDevice:commandBuffer.device];
[commandEncoder setRenderPipelineState:renderPipelineState];
[commandEncoder setVertexBuffer:vertexBuffer.buffer offset:0 atIndex:0];
size_t vertexBufferOffset = 0;
size_t indexBufferOffset = 0;
ImVec2 pos = drawData->DisplayPos;
for (int n = 0; n < drawData->CmdListsCount; n++)
{
const ImDrawList* cmd_list = drawData->CmdLists[n];
ImDrawIdx idx_buffer_offset = 0;
memcpy((char *)vertexBuffer.buffer.contents + vertexBufferOffset, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
memcpy((char *)indexBuffer.buffer.contents + indexBufferOffset, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
[commandEncoder setVertexBufferOffset:vertexBufferOffset atIndex:0];
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback)
{
// User callback (registered via ImDrawList::AddCallback)
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
ImVec4 clip_rect = ImVec4(pcmd->ClipRect.x - pos.x, pcmd->ClipRect.y - pos.y, pcmd->ClipRect.z - pos.x, pcmd->ClipRect.w - pos.y);
if (clip_rect.x < fb_width && clip_rect.y < fb_height && clip_rect.z >= 0.0f && clip_rect.w >= 0.0f)
{
// Apply scissor/clipping rectangle
MTLScissorRect scissorRect = { .x = NSUInteger(clip_rect.x),
.y = NSUInteger(clip_rect.y),
.width = NSUInteger(clip_rect.z - clip_rect.x),
.height = NSUInteger(clip_rect.w - clip_rect.y) };
[commandEncoder setScissorRect:scissorRect];
// Bind texture, Draw
if (pcmd->TextureId != NULL) {
[commandEncoder setFragmentTexture:(__bridge id<MTLTexture>)(pcmd->TextureId) atIndex:0];
}
[commandEncoder drawIndexedPrimitives:MTLPrimitiveTypeTriangle
indexCount:pcmd->ElemCount
indexType:sizeof(ImDrawIdx) == 2 ? MTLIndexTypeUInt16 : MTLIndexTypeUInt32
indexBuffer:indexBuffer.buffer
indexBufferOffset:indexBufferOffset + idx_buffer_offset];
}
}
idx_buffer_offset += pcmd->ElemCount * sizeof(ImDrawIdx);
}
vertexBufferOffset += cmd_list->VtxBuffer.Size * sizeof(ImDrawVert);
indexBufferOffset += cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx);
}
__weak id weakSelf = self;
[commandBuffer addCompletedHandler:^(id<MTLCommandBuffer>) {
dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf enqueueReusableBuffer:vertexBuffer];
[weakSelf enqueueReusableBuffer:indexBuffer];
});
}];
}
@end

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// ImGui Platform Binding for: OSX / Cocoa
// This needs to be used along with a Renderer (e.g. OpenGL2, OpenGL3, Vulkan, Metal..)
// [BETA] Beta bindings, not well tested. If you want a portable application, prefer using the Glfw or SDL platform bindings on Mac.
// Issues:
// [ ] Platform: Keys are all generally very broken. Best using [event keycode] and not [event characters]..
// [ ] Platform: Mouse cursor shapes and visibility are not supported (see end of https://github.com/glfw/glfw/issues/427)
@class NSEvent;
@class NSView;
IMGUI_API bool ImGui_ImplOSX_Init();
IMGUI_API void ImGui_ImplOSX_Shutdown();
IMGUI_API void ImGui_ImplOSX_NewFrame(NSView *_Nonnull view);
IMGUI_API bool ImGui_ImplOSX_HandleEvent(NSEvent *_Nonnull event, NSView *_Nullable view);

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// ImGui Platform Binding for: OSX / Cocoa
// This needs to be used along with a Renderer (e.g. OpenGL2, OpenGL3, Vulkan, Metal..)
// [BETA] Beta bindings, not well tested. If you want a portable application, prefer using the Glfw or SDL platform bindings on Mac.
// Issues:
// [ ] Platform: Keys are all generally very broken. Best using [event keycode] and not [event characters]..
// [ ] Platform: Mouse cursor shapes and visibility are not supported (see end of https://github.com/glfw/glfw/issues/427)
#include "imgui.h"
#include "imgui_impl_osx.h"
#import <Cocoa/Cocoa.h>
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2018-07-07: Initial version.
// Data
static clock_t g_Time = 0;
// Functions
bool ImGui_ImplOSX_Init()
{
ImGuiIO& io = ImGui::GetIO();
// Setup back-end capabilities flags
//io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
//io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
//io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports; // We can create multi-viewports on the Platform side (optional)
//io.BackendFlags |= ImGuiBackendFlags_HasMouseHoveredViewport; // We can set io.MouseHoveredViewport correctly (optional, not easy)
// Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
const int offset_for_function_keys = 256 - 0xF700;
io.KeyMap[ImGuiKey_Tab] = '\t';
io.KeyMap[ImGuiKey_LeftArrow] = NSLeftArrowFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_RightArrow] = NSRightArrowFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_UpArrow] = NSUpArrowFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_DownArrow] = NSDownArrowFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_PageUp] = NSPageUpFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_PageDown] = NSPageDownFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_Home] = NSHomeFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_End] = NSEndFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_Insert] = NSInsertFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_Delete] = NSDeleteFunctionKey + offset_for_function_keys;
io.KeyMap[ImGuiKey_Backspace] = 127;
io.KeyMap[ImGuiKey_Space] = 32;
io.KeyMap[ImGuiKey_Enter] = 13;
io.KeyMap[ImGuiKey_Escape] = 27;
io.KeyMap[ImGuiKey_A] = 'A';
io.KeyMap[ImGuiKey_C] = 'C';
io.KeyMap[ImGuiKey_V] = 'V';
io.KeyMap[ImGuiKey_X] = 'X';
io.KeyMap[ImGuiKey_Y] = 'Y';
io.KeyMap[ImGuiKey_Z] = 'Z';
io.SetClipboardTextFn = [](void*, const char* str) -> void
{
NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
[pasteboard declareTypes:[NSArray arrayWithObject:NSPasteboardTypeString] owner:nil];
[pasteboard setString:[NSString stringWithUTF8String:str] forType:NSPasteboardTypeString];
};
io.GetClipboardTextFn = [](void*) -> const char*
{
NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
NSString* available = [pasteboard availableTypeFromArray: [NSArray arrayWithObject:NSPasteboardTypeString]];
if (![available isEqualToString:NSPasteboardTypeString])
return NULL;
NSString* string = [pasteboard stringForType:NSPasteboardTypeString];
if (string == nil)
return NULL;
const char* string_c = (const char*)[string UTF8String];
size_t string_len = strlen(string_c);
static ImVector<char> s_clipboard;
s_clipboard.resize((int)string_len + 1);
strcpy(s_clipboard.Data, string_c);
return s_clipboard.Data;
};
return true;
}
void ImGui_ImplOSX_Shutdown()
{
}
void ImGui_ImplOSX_NewFrame(NSView* view)
{
// Setup display size
ImGuiIO& io = ImGui::GetIO();
const float dpi = [view.window backingScaleFactor];
io.DisplaySize = ImVec2((float)view.bounds.size.width, (float)view.bounds.size.height);
io.DisplayFramebufferScale = ImVec2(dpi, dpi);
// Setup time step
if (g_Time == 0)
g_Time = clock();
clock_t current_time = clock();
io.DeltaTime = (double)(current_time - g_Time) / CLOCKS_PER_SEC;
g_Time = current_time;
}
static int mapCharacterToKey(int c)
{
if (c >= 'a' && c <= 'z')
return c - 'a' + 'A';
if (c == 25) // SHIFT+TAB -> TAB
return 9;
if (c >= 0 && c < 256)
return c;
if (c >= 0xF700 && c < 0xF700 + 256)
return c - 0xF700 + 256;
return -1;
}
static void resetKeys()
{
ImGuiIO& io = ImGui::GetIO();
for (int n = 0; n < IM_ARRAYSIZE(io.KeysDown); n++)
io.KeysDown[n] = false;
}
bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view)
{
ImGuiIO& io = ImGui::GetIO();
if (event.type == NSEventTypeLeftMouseDown || event.type == NSEventTypeRightMouseDown || event.type == NSEventTypeOtherMouseDown)
{
int button = (int)[event buttonNumber];
if (button >= 0 && button < IM_ARRAYSIZE(io.MouseDown))
io.MouseDown[button] = true;
return io.WantCaptureMouse;
}
if (event.type == NSEventTypeLeftMouseUp || event.type == NSEventTypeRightMouseUp || event.type == NSEventTypeOtherMouseUp)
{
int button = (int)[event buttonNumber];
if (button >= 0 && button < IM_ARRAYSIZE(io.MouseDown))
io.MouseDown[button] = false;
return io.WantCaptureMouse;
}
if (event.type == NSEventTypeMouseMoved || event.type == NSEventTypeLeftMouseDragged)
{
NSPoint mousePoint = event.locationInWindow;
mousePoint = [view convertPoint:mousePoint fromView:nil];
mousePoint = NSMakePoint(mousePoint.x, view.bounds.size.height - mousePoint.y);
io.MousePos = ImVec2(mousePoint.x, mousePoint.y);
}
if (event.type == NSEventTypeScrollWheel)
{
double wheel_dx = 0.0;
double wheel_dy = 0.0;
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_6)
{
wheel_dx = [event scrollingDeltaX];
wheel_dy = [event scrollingDeltaY];
if ([event hasPreciseScrollingDeltas])
{
wheel_dx *= 0.1;
wheel_dy *= 0.1;
}
}
else
#endif /*MAC_OS_X_VERSION_MAX_ALLOWED*/
{
wheel_dx = [event deltaX];
wheel_dy = [event deltaY];
}
if (fabs(wheel_dx) > 0.0)
io.MouseWheelH += wheel_dx * 0.1f;
if (fabs(wheel_dy) > 0.0)
io.MouseWheel += wheel_dy * 0.1f;
return io.WantCaptureMouse;
}
// FIXME: All the key handling is wrong and broken. Refer to GLFW's cocoa_init.mm and cocoa_window.mm.
if (event.type == NSEventTypeKeyDown)
{
NSString* str = [event characters];
int len = (int)[str length];
for (int i = 0; i < len; i++)
{
int c = [str characterAtIndex:i];
if (c < 0xF700 && !io.KeyCtrl)
io.AddInputCharacter(c);
// We must reset in case we're pressing a sequence of special keys while keeping the command pressed
int key = mapCharacterToKey(c);
if (key != -1 && key < 256 && !io.KeyCtrl)
resetKeys();
if (key != -1)
io.KeysDown[key] = true;
}
return io.WantCaptureKeyboard;
}
if (event.type == NSEventTypeKeyUp)
{
NSString* str = [event characters];
int len = (int)[str length];
for (int i = 0; i < len; i++)
{
int c = [str characterAtIndex:i];
int key = mapCharacterToKey(c);
if (key != -1)
io.KeysDown[key] = false;
}
return io.WantCaptureKeyboard;
}
if (event.type == NSEventTypeFlagsChanged)
{
ImGuiIO& io = ImGui::GetIO();
unsigned int flags = [event modifierFlags] & NSEventModifierFlagDeviceIndependentFlagsMask;
bool oldKeyCtrl = io.KeyCtrl;
bool oldKeyShift = io.KeyShift;
bool oldKeyAlt = io.KeyAlt;
bool oldKeySuper = io.KeySuper;
io.KeyCtrl = flags & NSEventModifierFlagControl;
io.KeyShift = flags & NSEventModifierFlagShift;
io.KeyAlt = flags & NSEventModifierFlagOption;
io.KeySuper = flags & NSEventModifierFlagCommand;
// We must reset them as we will not receive any keyUp event if they where pressed with a modifier
if ((oldKeyShift && !io.KeyShift) || (oldKeyCtrl && !io.KeyCtrl) || (oldKeyAlt && !io.KeyAlt) || (oldKeySuper && !io.KeySuper))
resetKeys();
return io.WantCaptureKeyboard;
}
return false;
}