Basic metal renderer (only rendering a triangle as of right now).

bin/4ed_build.cpp

@@ -389,7 +389,7 @@ build(Arena *arena, u32 flags, u32 arch, char *code_path, char **code_files, cha
 #define CLANG_LIBS_COMMON \
 "-framework Cocoa -framework QuartzCore " \
 "-framework CoreServices " \
-"-framework OpenGL -framework IOKit "
+"-framework OpenGL -framework IOKit -framework Metal -framework MetalKit "
 
 #define CLANG_LIBS_X64 CLANG_LIBS_COMMON \
 FOREIGN "/x64/libfreetype-mac.a"
@@ -398,7 +398,7 @@ FOREIGN "/x64/libfreetype-mac.a"
 FOREIGN "/x86/libfreetype-mac.a"
 
 #else
-# error gcc options not set for this platform
+# error clang options not set for this platform
 #endif
 
 internal void

metal/4ed_metal_render.mm

@@ -0,0 +1,136 @@
+/* 4coder Metal render implementation */
+
+#undef clamp
+#undef function
+#import <simd/simd.h>
+#import <MetalKit/MetalKit.h>
+
+// Header shared between C code here, which executes Metal API commands, and .metal files, which
+// uses these types as inputs to the shaders.
+#import "AAPLShaderTypes.h"
+
+#define function static
+#define clamp(a,x,b) clamp_((a),(x),(b))
+
+@interface FCoderMetalRenderer : NSObject<MTKViewDelegate>
+- (nonnull instancetype)initWithMetalKitView:(nonnull MTKView *)mtkView;
+@end
+
+@implementation FCoderMetalRenderer{
+    id<MTLDevice> _device;
+    
+    // The render pipeline generated from the vertex and fragment shaders in the .metal shader file.
+    id<MTLRenderPipelineState> _pipelineState;
+    
+    // The command queue used to pass commands to the device.
+    id<MTLCommandQueue> _commandQueue;
+    
+    // The current size of the view, used as an input to the vertex shader.
+    vector_uint2 _viewportSize;
+}
+
+- (nonnull instancetype)initWithMetalKitView:(nonnull MTKView *)mtkView{
+    self = [super init];
+    if(self)
+    {
+        NSError *error = nil;
+        
+        _device = mtkView.device;
+        
+        // Load all the shader files with a .metal file extension in the project.
+        id<MTLLibrary> defaultLibrary = [_device newLibraryWithFile:@"shaders/AAPLShaders.metallib"
+                error:&error];
+        Assert(error == nil);
+        
+        id<MTLFunction> vertexFunction = [defaultLibrary newFunctionWithName:@"vertexShader"];
+        id<MTLFunction> fragmentFunction = [defaultLibrary newFunctionWithName:@"fragmentShader"];
+        
+        // Configure a pipeline descriptor that is used to create a pipeline state.
+        MTLRenderPipelineDescriptor *pipelineStateDescriptor = [[MTLRenderPipelineDescriptor alloc] init];
+        pipelineStateDescriptor.label = @"Simple Pipeline";
+        pipelineStateDescriptor.vertexFunction = vertexFunction;
+        pipelineStateDescriptor.fragmentFunction = fragmentFunction;
+        pipelineStateDescriptor.colorAttachments[0].pixelFormat = mtkView.colorPixelFormat;
+        
+        _pipelineState = [_device newRenderPipelineStateWithDescriptor:pipelineStateDescriptor
+                error:&error];
+        
+        // Pipeline State creation could fail if the pipeline descriptor isn't set up properly.
+        //  If the Metal API validation is enabled, you can find out more information about what
+        //  went wrong.  (Metal API validation is enabled by default when a debug build is run
+        //  from Xcode.)
+        NSAssert(_pipelineState, @"Failed to created pipeline state: %@", error);
+        
+        // Create the command queue
+        _commandQueue = [_device newCommandQueue];
+        
+        u32 max_buffer_size = (u32)[_device maxBufferLength];
+        printf("Max Buffer Size: %u - Which is %lu vertices\n", max_buffer_size, (max_buffer_size / sizeof(Render_Vertex)));
+    }
+    
+    return self;
+}
+
+/// Called whenever view changes orientation or is resized
+- (void)mtkView:(nonnull MTKView *)view drawableSizeWillChange:(CGSize)size{
+    // Save the size of the drawable to pass to the vertex shader.
+    
+}
+
+/// Called whenever the view needs to render a frame.
+- (void)drawInMTKView:(nonnull MTKView *)view{
+    CGSize size = [view drawableSize];
+    _viewportSize.x = size.width;
+    _viewportSize.y = size.height;
+    
+    static const AAPLVertex triangleVertices[] =
+    {
+        // 2D positions,    RGBA colors
+        { {  250,  -250 }, { 1, 0, 0, 1 } },
+        { { -250,  -250 }, { 0, 1, 0, 1 } },
+        { {    0,   250 }, { 0, 0, 1, 1 } },
+    };
+    
+    // Create a new command buffer for each render pass to the current drawable.
+    id<MTLCommandBuffer> commandBuffer = [_commandQueue commandBuffer];
+    commandBuffer.label = @"MyCommand";
+    
+    // Obtain a renderPassDescriptor generated from the view's drawable textures.
+    MTLRenderPassDescriptor *renderPassDescriptor = view.currentRenderPassDescriptor;
+    
+    if(renderPassDescriptor != nil)
+    {
+        // Create a render command encoder.
+        id<MTLRenderCommandEncoder> renderEncoder =
+            [commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor];
+        renderEncoder.label = @"MyRenderEncoder";
+        
+        // Set the region of the drawable to draw into.
+        [renderEncoder setViewport:(MTLViewport){0.0, 0.0, (double)_viewportSize.x, (double)_viewportSize.y, 0.0, 1.0 }];
+        
+        [renderEncoder setRenderPipelineState:_pipelineState];
+        
+        // Pass in the parameter data.
+        [renderEncoder setVertexBytes:triangleVertices
+                length:sizeof(triangleVertices)
+                atIndex:AAPLVertexInputIndexVertices];
+        
+        [renderEncoder setVertexBytes:&_viewportSize
+                length:sizeof(_viewportSize)
+                atIndex:AAPLVertexInputIndexViewportSize];
+        
+        // Draw the triangle.
+        [renderEncoder drawPrimitives:MTLPrimitiveTypeTriangle
+                vertexStart:0
+                vertexCount:3];
+        
+        [renderEncoder endEncoding];
+        
+        // Schedule a present once the framebuffer is complete using the current drawable.
+        [commandBuffer presentDrawable:view.currentDrawable];
+    }
+    
+    // Finalize rendering here & push the command buffer to the GPU.
+    [commandBuffer commit];
+}
+@end

metal/AAPLShaderTypes.h

@@ -0,0 +1,33 @@
+/*
+See LICENSE folder for this sample’s licensing information.
+
+Abstract:
+Header containing types and enum constants shared between Metal shaders and C/ObjC source
+*/
+
+#ifndef AAPLShaderTypes_h
+#define AAPLShaderTypes_h
+
+#undef clamp
+#include <simd/simd.h>
+#define clamp(a,x,b) clamp_((a),(x),(b))
+
+// Buffer index values shared between shader and C code to ensure Metal shader buffer inputs
+// match Metal API buffer set calls.
+typedef enum AAPLVertexInputIndex
+{
+    AAPLVertexInputIndexVertices     = 0,
+    AAPLVertexInputIndexViewportSize = 1,
+} AAPLVertexInputIndex;
+
+//  This structure defines the layout of vertices sent to the vertex
+//  shader. This header is shared between the .metal shader and C code, to guarantee that
+//  the layout of the vertex array in the C code matches the layout that the .metal
+//  vertex shader expects.
+typedef struct
+{
+    vector_float2 position;
+    vector_float4 color;
+} AAPLVertex;
+
+#endif /* AAPLShaderTypes_h */

metal/AAPLShaders.metal

@@ -0,0 +1,64 @@
+/*
+See LICENSE folder for this sample’s licensing information.
+
+Abstract:
+Metal shaders used for this sample
+*/
+
+#include <metal_stdlib>
+#include <simd/simd.h>
+
+using namespace metal;
+
+// Include header shared between this Metal shader code and C code executing Metal API commands.
+#import "AAPLShaderTypes.h"
+
+// Vertex shader outputs and fragment shader inputs
+typedef struct
+{
+    // The [[position]] attribute of this member indicates that this value
+    // is the clip space position of the vertex when this structure is
+    // returned from the vertex function.
+    float4 position [[position]];
+
+    // Since this member does not have a special attribute, the rasterizer
+    // interpolates its value with the values of the other triangle vertices
+    // and then passes the interpolated value to the fragment shader for each
+    // fragment in the triangle.
+    float4 color;
+
+} RasterizerData;
+
+vertex RasterizerData
+vertexShader(uint vertexID [[vertex_id]],
+             constant AAPLVertex *vertices [[buffer(AAPLVertexInputIndexVertices)]],
+             constant vector_uint2 *viewportSizePointer [[buffer(AAPLVertexInputIndexViewportSize)]])
+{
+    RasterizerData out;
+
+    // Index into the array of positions to get the current vertex.
+    // The positions are specified in pixel dimensions (i.e. a value of 100
+    // is 100 pixels from the origin).
+    float2 pixelSpacePosition = vertices[vertexID].position.xy;
+
+    // Get the viewport size and cast to float.
+    vector_float2 viewportSize = vector_float2(*viewportSizePointer);
+    
+
+    // To convert from positions in pixel space to positions in clip-space,
+    //  divide the pixel coordinates by half the size of the viewport.
+    out.position = vector_float4(0.0, 0.0, 0.0, 1.0);
+    out.position.xy = pixelSpacePosition / (viewportSize / 2.0);
+
+    // Pass the input color directly to the rasterizer.
+    out.color = vertices[vertexID].color;
+
+    return out;
+}
+
+fragment float4 fragmentShader(RasterizerData in [[stage_in]])
+{
+    // Return the interpolated color.
+    return in.color;
+}
+

opengl/4ed_opengl_render.cpp

@@ -285,6 +285,9 @@ gl_render(Render_Target *t){
     t->free_texture_first = 0;
     t->free_texture_last = 0;
     
+    u32 all_vertex_count = 0;
+    
+    u64 begin_draw = system_now_time();
     for (Render_Group *group = t->group_first;
          group != 0;
          group = group->next){
@@ -339,9 +342,18 @@ gl_render(Render_Target *t){
             glDisableVertexAttribArray(gpu_program.vertex_c);
             glDisableVertexAttribArray(gpu_program.vertex_ht);
         }
-    }
         
+        all_vertex_count += vertex_count;
+    }
+    u64 end_draw = system_now_time();
+    printf("Draw time: %fs\n", mac_get_time_diff_sec(begin_draw, end_draw));
+    
+    u64 begin_flush = system_now_time();
     glFlush();
+    u64 end_flush = system_now_time();
+    printf("Flush time: %fs\n", mac_get_time_diff_sec(begin_flush, end_flush));
+    
+    printf("Drawn %d Vertices\n", all_vertex_count);
 }
 
 // BOTTOM

platform_mac/mac_4ed.mm

@@ -273,11 +273,24 @@ mac_to_object(Plat_Handle handle){
 #include <OpenGL/gl.h>
 #import "mac_4ed_opengl.mm"
 
+#import "mac_4ed_metal.mm"
+
 #include "4ed_font_provider_freetype.h"
 #include "4ed_font_provider_freetype.cpp"
 
 #import "mac_4ed_functions.mm"
 
+
+
+////////////////////////////////
+
+global Key_Code keycode_lookup_table[255];
+
+function void
+mac_key_code_init(void){
+    
+}
+
 ////////////////////////////////
 
 function void
@@ -326,8 +339,6 @@ mac_resize(NSWindow *window){
 
 ////////////////////////////////
 
-// TODO(yuval): mac_resize(bounds.size.width, bounds.size.height);
-
 @implementation FCoderAppDelegate
 - (void)applicationDidFinishLaunching:(id)sender{
 }
@@ -376,6 +387,13 @@ mac_resize(NSWindow *window){
 }
 
 - (void)drawRect:(NSRect)bounds{
+    /* NOTE(yuval): Force the graphics context to clear to black so we don't
+get a flash of white until the app is ready to draw. In practice on modern macOS,
+this only gets called for window creation and other extraordinary events.
+(Taken From SDL) */
+    [[NSColor blackColor] setFill];
+    NSRectFill(bounds);
+    
     // NOTE(yuval): Read comment in win32_4ed.cpp's main loop
     system_mutex_release(mac_vars.global_frame_mutex);
     
@@ -422,7 +440,8 @@ mac_resize(NSWindow *window){
         [NSApp terminate:nil];
     }
     
-    mac_gl_render(&target);
+    // mac_gl_render(&target);
+    mac_metal_render(&target);
     
     mac_vars.first = false;
     
@@ -670,17 +689,19 @@ main(int arg_count, char **args){
         
         NSView* content_view = [mac_vars.window contentView];
         
-        // NOTE(yuval): Initialize the renderer
-        mac_gl_init(mac_vars.window);
-        
         // NOTE(yuval): Create the 4coder view
         mac_vars.view = [[FCoderView alloc] init];
         [mac_vars.view setFrame:[content_view bounds]];
         [mac_vars.view setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
         
+        // NOTE(yuval): Display window and view
         [content_view addSubview:mac_vars.view];
         [mac_vars.window makeKeyAndOrderFront:nil];
         
+        // NOTE(yuval): Initialize the renderer
+        mac_gl_init(mac_vars.window);
+        mac_metal_init(mac_vars.window);
+        
         mac_resize(w, h);
         
         //

platform_mac/mac_4ed_metal.mm

@@ -0,0 +1,29 @@
+#import "metal/4ed_metal_render.mm"
+
+global MTKView *metal_view;
+global FCoderMetalRenderer *metal_renderer;
+
+function void
+mac_metal_init(NSWindow *window){
+    // NOTE(yuval): Create Metal view
+    NSView *content_view = [window contentView];
+    
+    metal_view = [[MTKView alloc] initWithFrame:[content_view bounds]];
+    [metal_view setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
+    
+    metal_view.device = MTLCreateSystemDefaultDevice();
+    
+    // NOTE(yuval): Add the Metal view as a subview of the window
+    [content_view addSubview:metal_view];
+    
+    // NOTE(yuval): Create the Metal renderer
+    metal_renderer = [[FCoderMetalRenderer alloc] initWithMetalKitView:metal_view];
+}
+
+function void
+mac_metal_render(Render_Target* target){
+    u64 begin_time = system_now_time();
+    [metal_renderer drawInMTKView:metal_view];
+    u64 end_time = system_now_time();
+    printf("Metal Render Time: %fs\n\n", mac_get_time_diff_sec(begin_time, end_time));
+}

platform_mac/mac_4ed_opengl.mm

@@ -5,6 +5,11 @@
 #define GL_FUNC(N,R,P) typedef R (CALL_CONVENTION N##_Function)P; N##_Function *N = 0;
 #include "mac_4ed_opengl_funcs.h"
 
+f64 mac_get_time_diff_sec(u64 begin, u64 end){
+    f64 result = ((end - begin) / 1000000.0);
+    return result;
+}
+
 #include "opengl/4ed_opengl_render.cpp"
 
 @interface OpenGLView : NSOpenGLView
@@ -12,8 +17,6 @@
 - (void)render:(Render_Target*)target;
 @end
 
-global OpenGLView *opengl_view;
-
 @implementation OpenGLView{
     b32 glIsInitialized;
 }
@@ -95,14 +98,35 @@ global OpenGLView *opengl_view;
 - (void)render:(Render_Target*)target{
     Assert(glIsInitialized);
     
+    u64 context_lock_begin = system_now_time();
     CGLLockContext([[self openGLContext] CGLContextObj]);
+    u64 context_lock_end = system_now_time();
+    printf("Context lock time: %fs\n", mac_get_time_diff_sec(context_lock_begin, context_lock_end));
+    
+    u64 make_current_context_begin = system_now_time();
     [[self openGLContext] makeCurrentContext];
+    u64 make_current_context_end = system_now_time();
+    printf("Make current context time: %fs\n", mac_get_time_diff_sec(make_current_context_begin, make_current_context_end));
+    
+    u64 gl_render_begin = system_now_time();
     gl_render(target);
+    u64 gl_render_end = system_now_time();
+    printf("GL render time: %fs\n", mac_get_time_diff_sec(gl_render_begin, gl_render_end));
+    
+    u64 gl_flush_buffer_begin = system_now_time();
     [[self openGLContext] flushBuffer];
+    u64 gl_flush_buffer_end = system_now_time();
+    printf("GL flush buffer time: %fs\n", mac_get_time_diff_sec(gl_flush_buffer_begin, gl_flush_buffer_end));
+    
+    u64 context_unlock_begin = system_now_time();
     CGLUnlockContext([[self openGLContext] CGLContextObj]);
+    u64 context_unlock_end = system_now_time();
+    printf("Context unlock time: %fs\n", mac_get_time_diff_sec(context_unlock_begin, context_unlock_end));
 }
 @end
 
+global OpenGLView *opengl_view;
+
 function void
 mac_gl_init(NSWindow *window){
     // NOTE(yuval): Create OpenGLView
@@ -125,8 +149,8 @@ mac_gl_init(NSWindow *window){
 
 function void
 mac_gl_render(Render_Target* target){
-    f64 begin_time = system_now_time() / 1000000.0;
+    u64 begin_time = system_now_time();
     [opengl_view render:target];
-    f64 end_time = system_now_time() / 1000000.0;
-    printf("Render Time: %fs\n", (end_time - begin_time));
+    u64 end_time = system_now_time();
+    printf("Render Time: %fs\n\n", mac_get_time_diff_sec(begin_time, end_time));
 }