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My first baby steps in Metal continue; here's a triangle.

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This commit is contained in:
Thomas Harte 2020-08-04 21:49:01 -04:00
parent 72df6e52cd
commit eff24a8726
3 changed files with 72 additions and 2 deletions
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4
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
View File

@ -157,6 +157,7 @@
4B1EDB451E39A0AC009D6819 /* chip.png in Resources */ = {isa = PBXBuildFile; fileRef = 4B1EDB431E39A0AC009D6819 /* chip.png */; };
4B228CD524D773B40077EF25 /* CSScanTarget.mm in Sources */ = {isa = PBXBuildFile; fileRef = 4B228CD424D773B30077EF25 /* CSScanTarget.mm */; };
4B228CD924DA12C60077EF25 /* CSScanTargetView.m in Sources */ = {isa = PBXBuildFile; fileRef = 4B228CD824DA12C60077EF25 /* CSScanTargetView.m */; };
4B228CDB24DA41890077EF25 /* ScanTarget.metal in Sources */ = {isa = PBXBuildFile; fileRef = 4B228CDA24DA41880077EF25 /* ScanTarget.metal */; };
4B2530F4244E6774007980BF /* fm.json in Resources */ = {isa = PBXBuildFile; fileRef = 4B2530F3244E6773007980BF /* fm.json */; };
4B2A332D1DB86821002876E3 /* OricOptions.xib in Resources */ = {isa = PBXBuildFile; fileRef = 4B2A332B1DB86821002876E3 /* OricOptions.xib */; };
4B2A539F1D117D36003C6002 /* CSAudioQueue.m in Sources */ = {isa = PBXBuildFile; fileRef = 4B2A53911D117D36003C6002 /* CSAudioQueue.m */; };
@ -1009,6 +1010,7 @@
4B228CD624D773CA0077EF25 /* CSScanTarget.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = CSScanTarget.h; sourceTree = "<group>"; };
4B228CD724DA12C50077EF25 /* CSScanTargetView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSScanTargetView.h; sourceTree = "<group>"; };
4B228CD824DA12C60077EF25 /* CSScanTargetView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSScanTargetView.m; sourceTree = "<group>"; };
4B228CDA24DA41880077EF25 /* ScanTarget.metal */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.metal; name = ScanTarget.metal; path = "Clock Signal/ScanTarget/ScanTarget.metal"; sourceTree = "<group>"; };
4B24095A1C45DF85004DA684 /* Stepper.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = Stepper.hpp; sourceTree = "<group>"; };
4B2530F3244E6773007980BF /* fm.json */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.json; path = fm.json; sourceTree = "<group>"; };
4B2A332C1DB86821002876E3 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = "Clock Signal/Base.lproj/OricOptions.xib"; sourceTree = SOURCE_ROOT; };
@ -3323,6 +3325,7 @@
4BB73E951B587A5100552FC2 = {
isa = PBXGroup;
children = (
4B228CDA24DA41880077EF25 /* ScanTarget.metal */,
4BC3C67A24C9230F0027BF76 /* BufferingScanTarget.cpp */,
4BC3C67B24C9230F0027BF76 /* BufferingScanTarget.hpp */,
4BC76E6A1C98F43700E6EF73 /* Accelerate.framework */,
@ -4687,6 +4690,7 @@
4BA61EB01D91515900B3C876 /* NSData+StdVector.mm in Sources */,
4BDA00E022E644AF00AC3CD0 /* CSROMReceiverView.m in Sources */,
4BD191F42191180E0042E144 /* ScanTarget.cpp in Sources */,
4B228CDB24DA41890077EF25 /* ScanTarget.metal in Sources */,
4B228CD524D773B40077EF25 /* CSScanTarget.mm in Sources */,
4BCD634922D6756400F567F1 /* MacintoshDoubleDensityDrive.cpp in Sources */,
4B0F94FE208C1A1600FE41D9 /* NIB.cpp in Sources */,

42
OSBindings/Mac/Clock Signal/ScanTarget/CSScanTarget.mm
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@ -12,12 +12,43 @@
@implementation CSScanTarget {
id<MTLCommandQueue> _commandQueue;
// TEST ONLY: to check that I'm drawing _something_, I'm heading towards ye standard
// Gouraud shading triangle. https://metalbyexample.com/up-and-running-2/ is providing
// much of the inspiration, albeit that I'm proceeding via MKLView.
id<MTLFunction> _vertexShader;
id<MTLFunction> _fragmentShader;
id<MTLBuffer> _positionBuffer;
id<MTLBuffer> _colourBuffer;
id<MTLRenderPipelineState> _gouraudPipeline;
}
- (nonnull instancetype)initWithView:(nonnull MTKView *)view {
self = [super init];
if(self) {
_commandQueue = [view.device newCommandQueue];
// Generate some static buffers. AS A TEST.
constexpr float positions[] = {
0.0f, 0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, 0.0f, 1.0f,
};
constexpr float colours[] = {
1.0f, 0.0f, 0.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f, 1.0f,
};
_positionBuffer = [view.device newBufferWithBytes:positions length:sizeof(positions) options:MTLResourceOptionCPUCacheModeDefault];
_colourBuffer = [view.device newBufferWithBytes:colours length:sizeof(colours) options:MTLResourceOptionCPUCacheModeDefault];
// Generate TEST pipeline.
id<MTLLibrary> library = [view.device newDefaultLibrary];
MTLRenderPipelineDescriptor *pipelineDescriptor = [[MTLRenderPipelineDescriptor alloc] init];
pipelineDescriptor.vertexFunction = [library newFunctionWithName:@"vertex_main"];
pipelineDescriptor.fragmentFunction = [library newFunctionWithName:@"fragment_main"];
pipelineDescriptor.colorAttachments[0].pixelFormat = view.colorPixelFormat;
_gouraudPipeline = [view.device newRenderPipelineStateWithDescriptor:pipelineDescriptor error:nil];
}
return self;
}
@ -30,7 +61,8 @@
@param size New drawable size in pixels
*/
- (void)mtkView:(nonnull MTKView *)view drawableSizeWillChange:(CGSize)size {
NSLog(@"New size: %@", NSStringFromSize(size));
// I think (?) I don't care about this; the MKLView has already handled resizing the backing,
// which will naturally change the viewport.
}
/*!
@ -39,12 +71,18 @@
@discussion Called on the delegate when it is asked to render into the view
*/
- (void)drawInMTKView:(nonnull MTKView *)view {
// Generate a command encoder for the view.
id <MTLCommandBuffer> commandBuffer = [_commandQueue commandBuffer];
MTLRenderPassDescriptor *const descriptor = view.currentRenderPassDescriptor;
id <MTLRenderCommandEncoder> encoder = [commandBuffer renderCommandEncoderWithDescriptor:descriptor];
// TODO: the drawing (!)
// Drawing. Just the test triangle, as described above.
[encoder setRenderPipelineState:_gouraudPipeline];
[encoder setVertexBuffer:_positionBuffer offset:0 atIndex:0];
[encoder setVertexBuffer:_colourBuffer offset:0 atIndex:1];
[encoder drawPrimitives:MTLPrimitiveTypeTriangle vertexStart:0 vertexCount:3 instanceCount:1];
// Complete encoding.
[encoder endEncoding];
// "Register the drawable's presentation".

28
OSBindings/Mac/Clock Signal/ScanTarget/ScanTarget.metal Normal file
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@ -0,0 +1,28 @@
//
// ScanTarget.metal
// Clock Signal
//
// Created by Thomas Harte on 04/08/2020.
// Copyright © 2020 Thomas Harte. All rights reserved.
//
#include <metal_stdlib>
using namespace metal;
struct ColoredVertex {
float4 position [[position]];
float4 color;
};
vertex ColoredVertex vertex_main( constant float4 *position [[buffer(0)]],
constant float4 *color [[buffer(1)]],
uint vid [[vertex_id]]) {
ColoredVertex vert;
vert.position = position[vid];
vert.color = color[vid];
return vert;
}
fragment float4 fragment_main(ColoredVertex vert [[stage_in]]) {
return vert.color;
}