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Initial Metal example
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@ -41,6 +41,13 @@ add_executable(wave WIN32 MACOSX_BUNDLE wave.c ${ICON} ${GLAD})
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target_link_libraries(particles "${CMAKE_THREAD_LIBS_INIT}" "${RT_LIBRARY}")
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if (APPLE)
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add_executable(metal MACOSX_BUNDLE metal.m ${ICON})
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target_compile_options(metal PUBLIC "-fobjc-arc")
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target_link_libraries(metal "-framework Metal" "-framework QuartzCore")
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set_target_properties(metal PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Metal")
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endif()
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set(WINDOWS_BINARIES boing gears heightmap particles simple splitview wave)
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set(CONSOLE_BINARIES offscreen)
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@ -57,6 +64,7 @@ if (APPLE)
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set_target_properties(boing PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Boing")
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set_target_properties(gears PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Gears")
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set_target_properties(heightmap PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Heightmap")
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set_target_properties(metal PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Metal")
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set_target_properties(particles PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Particles")
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set_target_properties(simple PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Simple")
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set_target_properties(splitview PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "SplitView")
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167
examples/metal.m
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167
examples/metal.m
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@ -0,0 +1,167 @@
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//========================================================================
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// Simple GLFW+Metal example
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// Copyright (c) Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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//! [code]
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#import <Metal/Metal.h>
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#import <QuartzCore/QuartzCore.h>
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#import <simd/simd.h>
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#define GLFW_INCLUDE_NONE
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#import <GLFW/glfw3.h>
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#define GLFW_EXPOSE_NATIVE_COCOA
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#define GLFW_EXPOSE_NATIVE_NSGL
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#import <GLFW/glfw3native.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <stdio.h>
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static void error_callback(int error, const char* description)
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{
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fputs(description, stderr);
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}
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static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
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{
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if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
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glfwSetWindowShouldClose(window, GLFW_TRUE);
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}
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int main(void)
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{
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id<MTLDevice> device = MTLCreateSystemDefaultDevice();
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if (!device)
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{
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exit(EXIT_FAILURE);
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}
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GLFWwindow* window;
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glfwSetErrorCallback(error_callback);
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if (!glfwInit())
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exit(EXIT_FAILURE);
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glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
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window = glfwCreateWindow(640, 480, "Metal Example", NULL, NULL);
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if (!window)
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{
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glfwTerminate();
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exit(EXIT_FAILURE);
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}
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NSWindow *nswin = glfwGetCocoaWindow(window);
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CAMetalLayer *layer = [CAMetalLayer layer];
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layer.device = device;
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layer.pixelFormat = MTLPixelFormatBGRA8Unorm;
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nswin.contentView.layer = layer;
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nswin.contentView.wantsLayer = YES;
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MTLCompileOptions *compileOptions = [MTLCompileOptions new];
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compileOptions.languageVersion = MTLLanguageVersion1_1;
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NSError *compileError;
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id<MTLLibrary> lib = [device newLibraryWithSource:
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@"#include <metal_stdlib>\n"
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"using namespace metal;\n"
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"vertex float4 v_simple(\n"
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" constant float4 *in [[buffer(0)]],\n"
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" uint vid [[vertex_id]])\n"
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"{\n"
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" return in[vid];\n"
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"}\n"
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"fragment float4 f_simple(\n"
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" float4 in [[stage_in]])\n"
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"{\n"
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" return float4(1, 0, 0, 1);\n"
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"}\n"
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options:compileOptions error:&compileError];
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if (!lib)
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{
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NSLog(@"can't create library: %@", compileError);
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glfwTerminate();
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exit(EXIT_FAILURE);
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}
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id<MTLFunction> vs = [lib newFunctionWithName:@"v_simple"];
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assert(vs);
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id<MTLFunction> fs = [lib newFunctionWithName:@"f_simple"];
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assert(fs);
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id<MTLCommandQueue> cq = [device newCommandQueue];
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assert(cq);
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MTLRenderPipelineDescriptor *rpd = [MTLRenderPipelineDescriptor new];
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rpd.vertexFunction = vs;
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rpd.fragmentFunction = fs;
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rpd.colorAttachments[0].pixelFormat = layer.pixelFormat;
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id<MTLRenderPipelineState> rps = [device newRenderPipelineStateWithDescriptor:rpd error:NULL];
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assert(rps);
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glfwSetKeyCallback(window, key_callback);
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while (!glfwWindowShouldClose(window))
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{
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float ratio;
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int width, height;
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glfwGetFramebufferSize(window, &width, &height);
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ratio = width / (float) height;
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layer.drawableSize = CGSizeMake(width, height);
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id<CAMetalDrawable> drawable = [layer nextDrawable];
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assert(drawable);
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id<MTLCommandBuffer> cb = [cq commandBuffer];
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MTLRenderPassDescriptor *rpd = [MTLRenderPassDescriptor new];
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MTLRenderPassColorAttachmentDescriptor *cd = rpd.colorAttachments[0];
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cd.texture = drawable.texture;
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cd.loadAction = MTLLoadActionClear;
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cd.clearColor = MTLClearColorMake(1.0, 1.0, 1.0, 1.0);
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cd.storeAction = MTLStoreActionStore;
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id<MTLRenderCommandEncoder> rce = [cb renderCommandEncoderWithDescriptor:rpd];
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[rce setRenderPipelineState:rps];
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[rce setVertexBytes:(vector_float4[]){
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{ 0, 0, 0, 1 },
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{ -1, 1, 0, 1 },
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{ 1, 1, 0, 1 },
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} length:3 * sizeof(vector_float4) atIndex:0];
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[rce drawPrimitives:MTLPrimitiveTypeTriangle vertexStart:0 vertexCount:3];
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[rce endEncoding];
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[cb presentDrawable:drawable];
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[cb commit];
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glfwPollEvents();
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}
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glfwDestroyWindow(window);
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glfwTerminate();
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exit(EXIT_SUCCESS);
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}
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//! [code]
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