Work on metal renderer. Only semi-working for now.
Yuval Dolev
parent
813ba593e3
commit
efad772401
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@ -15,6 +15,7 @@ struct Metal_Renderer{
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id<MTLRenderPipelineState> pipeline_state;
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id<MTLCommandQueue> command_queue;
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id<MTLBuffer> buffer;
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id<MTLCaptureScope> capture_scope;
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};
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global_const u32 metal_max_vertices = (1<<16);
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@ -25,193 +26,94 @@ global_const char *metal__shaders_source = R"(
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using namespace metal;
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// Buffer index values shared between shader and C code to ensure Metal shader buffer inputs
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// match Metal API buffer set calls.
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typedef enum AAPLVertexInputIndex
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{
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AAPLVertexInputIndexVertices = 0,
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AAPLVertexInputIndexViewportSize = 1,
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} AAPLVertexInputIndex;
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////////////////////////////////
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// This structure defines the layout of vertices sent to the vertex
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// shader. This header is shared between the .metal shader and C code, to guarantee that
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// the layout of the vertex array in the C code matches the layout that the .metal
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// vertex shader expects.
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typedef struct
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{
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vector_float2 position;
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vector_float4 color;
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} AAPLVertex;
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typedef struct{
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packed_float2 xy;
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packed_float3 uvw;
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uint32_t color;
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float half_thickness;
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} Vertex;
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// Vertex shader outputs and fragment shader inputs
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typedef struct
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{
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// The [[position]] attribute of this member indicates that this value
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// is the clip space position of the vertex when this structure is
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// returned from the vertex function.
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// NOTE(yuval): Vertex shader outputs and fragment shader inputs
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typedef struct{
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// NOTE(yuval): Vertex shader output
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float4 position [[position]];
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// Since this member does not have a special attribute, the rasterizer
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// interpolates its value with the values of the other triangle vertices
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// and then passes the interpolated value to the fragment shader for each
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// fragment in the triangle.
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// NOTE(yuval): Fragment shader inputs
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float4 color;
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float3 uvw;
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float2 xy;
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float2 adjusted_half_dim;
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float half_thickness;
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} Rasterizer_Data;
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} RasterizerData;
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////////////////////////////////
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vertex RasterizerData
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vertexShader(uint vertexID [[vertex_id]],
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constant AAPLVertex *vertices [[buffer(AAPLVertexInputIndexVertices)]],
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constant float4x4 &projMatrix[[buffer(AAPLVertexInputIndexViewportSize)]])
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{
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RasterizerData out;
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vertex Rasterizer_Data
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vertex_shader(uint vertex_id [[vertex_id]], constant Vertex *vertices [[buffer(0)]],
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constant float4x4 &proj [[buffer(1)]]){
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constant Vertex *in = &vertices[vertex_id];
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Rasterizer_Data out;
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// Index into the array of positions to get the current vertex.
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// The positions are specified in pixel dimensions (i.e. a value of 100
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// is 100 pixels from the origin).
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float2 pixelSpacePosition = vertices[vertexID].position.xy;
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// NOTE(yuval): Calculate position in NDC
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out.position = proj * float4(in->xy, 0.0, 1.0);
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// To convert from positions in pixel space to positions in clip-space,
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// divide the pixel coordinates by half the size of the viewport.
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out.position = projMatrix * float4(pixelSpacePosition, 0.0, 1.0);
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// NOTE(yuval): Convert color to float4 format
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out.color.b = ((float((in->color ) & 0xFFu)) / 255.0);
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out.color.g = ((float((in->color >> 8u) & 0xFFu)) / 255.0);
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out.color.r = ((float((in->color >> 16u) & 0xFFu)) / 255.0);
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out.color.a = ((float((in->color >> 24u) & 0xFFu)) / 255.0);
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// Pass the input color directly to the rasterizer.
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out.color = vertices[vertexID].color;
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// NOTE(yuval): Pass uvw coordinates to the fragment shader
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out.uvw = in->uvw;
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return out;
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// NOTE(yuval): Calculate adjusted half dim
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float2 center = in->uvw.xy;
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float2 half_dim = abs(in->xy - center);
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out.adjusted_half_dim = (half_dim - in->uvw.zz + float2(0.5, 0.5));
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// NOTE(yuval): Pass half_thickness to the fragment shader
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out.half_thickness = in->half_thickness;
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// NOTE(yuval): Pass xy to the fragment shader
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out.xy = in->xy;
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return(out);
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}
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fragment float4 fragmentShader(RasterizerData in [[stage_in]])
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{
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// Return the interpolated color.
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return in.color;
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////////////////////////////////
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float
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rectangle_sd(float2 p, float2 b){
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float2 d = (abs(p) - b);
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float result = (length(max(d, float2(0.0, 0.0))) + min(max(d.x, d.y), 0.0));
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return(result);
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}
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fragment float4
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fragment_shader(Rasterizer_Data in [[stage_in]]){
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float has_thickness = step(0.49, in.half_thickness);
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// float does_not_have_thickness = (1.0 - has_thickness);
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// TODO(yuval): Sample texture here.
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float2 center = in.uvw.xy;
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float roundness = in.uvw.z;
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float sd = rectangle_sd(in.xy - center, in.adjusted_half_dim);
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sd = sd - roundness;
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sd = (abs(sd + in.half_thickness) - in.half_thickness);
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float shape_value = (1.0 - smoothstep(-1.0, 0.0, sd));
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shape_value *= has_thickness;
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// TOOD(yuval): Add sample_value to alpha
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float4 out_color = in.color;// float4(in.color.xyz, in.color.a * (shape_value));
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return(out_color);
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}
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)";
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@interface FCoderMetalRenderer : NSObject<MTKViewDelegate>
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- (nonnull instancetype)initWithMetalKitView:(nonnull MTKView *)mtkView;
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@end
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@implementation FCoderMetalRenderer{
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id<MTLDevice> _device;
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// The render pipeline generated from the vertex and fragment shaders in the .metal shader file.
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id<MTLRenderPipelineState> _pipelineState;
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// The command queue used to pass commands to the device.
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id<MTLCommandQueue> _commandQueue;
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// The current size of the view, used as an input to the vertex shader.
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vector_uint2 _viewportSize;
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}
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- (nonnull instancetype)initWithMetalKitView:(nonnull MTKView *)mtkView{
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self = [super init];
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if(self)
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{
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NSError *error = nil;
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_device = mtkView.device;
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// Load all the shader files with a .metal file extension in the project.
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id<MTLLibrary> defaultLibrary = [_device newLibraryWithFile:@"shaders/AAPLShaders.metallib"
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error:&error];
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Assert(error == nil);
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id<MTLFunction> vertexFunction = [defaultLibrary newFunctionWithName:@"vertexShader"];
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id<MTLFunction> fragmentFunction = [defaultLibrary newFunctionWithName:@"fragmentShader"];
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// Configure a pipeline descriptor that is used to create a pipeline state.
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MTLRenderPipelineDescriptor *pipelineStateDescriptor = [[MTLRenderPipelineDescriptor alloc] init];
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pipelineStateDescriptor.label = @"Simple Pipeline";
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pipelineStateDescriptor.vertexFunction = vertexFunction;
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pipelineStateDescriptor.fragmentFunction = fragmentFunction;
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pipelineStateDescriptor.colorAttachments[0].pixelFormat = mtkView.colorPixelFormat;
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_pipelineState = [_device newRenderPipelineStateWithDescriptor:pipelineStateDescriptor
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error:&error];
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// Pipeline State creation could fail if the pipeline descriptor isn't set up properly.
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// If the Metal API validation is enabled, you can find out more information about what
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// went wrong. (Metal API validation is enabled by default when a debug build is run
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// from Xcode.)
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NSAssert(_pipelineState, @"Failed to created pipeline state: %@", error);
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// Create the command queue
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_commandQueue = [_device newCommandQueue];
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u32 max_buffer_size = (u32)[_device maxBufferLength];
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printf("Max Buffer Size: %u - Which is %lu vertices\n", max_buffer_size, (max_buffer_size / sizeof(Render_Vertex)));
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}
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return self;
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}
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/// Called whenever view changes orientation or is resized
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- (void)mtkView:(nonnull MTKView *)view drawableSizeWillChange:(CGSize)size{
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// Save the size of the drawable to pass to the vertex shader.
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}
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/// Called whenever the view needs to render a frame.
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- (void)drawInMTKView:(nonnull MTKView *)view{
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CGSize size = [view drawableSize];
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_viewportSize.x = size.width;
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_viewportSize.y = size.height;
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static const AAPLVertex triangleVertices[] =
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{
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// 2D positions, RGBA colors
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{ { 250, -250 }, { 1, 0, 0, 1 } },
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{ { -250, -250 }, { 0, 1, 0, 1 } },
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{ { 0, 250 }, { 0, 0, 1, 1 } },
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};
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// Create a new command buffer for each render pass to the current drawable.
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id<MTLCommandBuffer> commandBuffer = [_commandQueue commandBuffer];
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commandBuffer.label = @"MyCommand";
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// Obtain a renderPassDescriptor generated from the view's drawable textures.
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MTLRenderPassDescriptor *renderPassDescriptor = view.currentRenderPassDescriptor;
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if(renderPassDescriptor != nil)
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{
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// Create a render command encoder.
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id<MTLRenderCommandEncoder> renderEncoder =
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[commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor];
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renderEncoder.label = @"MyRenderEncoder";
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// Set the region of the drawable to draw into.
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[renderEncoder setViewport:(MTLViewport){0.0, 0.0, (double)_viewportSize.x, (double)_viewportSize.y, 0.0, 1.0 }];
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[renderEncoder setRenderPipelineState:_pipelineState];
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// Pass in the parameter data.
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[renderEncoder setVertexBytes:triangleVertices
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length:sizeof(triangleVertices)
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atIndex:AAPLVertexInputIndexVertices];
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[renderEncoder setVertexBytes:&_viewportSize
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length:sizeof(_viewportSize)
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atIndex:AAPLVertexInputIndexViewportSize];
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// Draw the triangle.
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[renderEncoder drawPrimitives:MTLPrimitiveTypeTriangle
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vertexStart:0
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vertexCount:3];
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[renderEncoder endEncoding];
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// Schedule a present once the framebuffer is complete using the current drawable.
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[commandBuffer presentDrawable:view.currentDrawable];
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}
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// Finalize rendering here & push the command buffer to the GPU.
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[commandBuffer commit];
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}
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@end
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function b32
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function void
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metal_init(Metal_Renderer *renderer, MTKView *view){
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NSError *error = nil;
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@ -229,15 +131,13 @@ metal_init(Metal_Renderer *renderer, MTKView *view){
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id<MTLLibrary> shader_library = [renderer->device newLibraryWithSource:shaders_source_str
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options:options error:&error];
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vertex_function = [shader_library newFunctionWithName:@"vertexShader"];
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fragment_function = [shader_library newFunctionWithName:@"fragmentShader"];
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vertex_function = [shader_library newFunctionWithName:@"vertex_shader"];
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fragment_function = [shader_library newFunctionWithName:@"fragment_shader"];
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[options release];
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}
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if (error != nil){
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return(false);
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}
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Assert(error == nil);
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// NOTE(yuval): Configure the pipeline descriptor
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{
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@ -246,14 +146,17 @@ metal_init(Metal_Renderer *renderer, MTKView *view){
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pipeline_state_descriptor.vertexFunction = vertex_function;
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pipeline_state_descriptor.fragmentFunction = fragment_function;
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pipeline_state_descriptor.colorAttachments[0].pixelFormat = view.colorPixelFormat;
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pipeline_state_descriptor.colorAttachments[0].blendingEnabled = YES;
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pipeline_state_descriptor.colorAttachments[0].sourceRGBBlendFactor = MTLBlendFactorSourceAlpha;
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pipeline_state_descriptor.colorAttachments[0].destinationRGBBlendFactor = MTLBlendFactorOneMinusSourceAlpha;
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pipeline_state_descriptor.colorAttachments[0].sourceAlphaBlendFactor = MTLBlendFactorOne;
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pipeline_state_descriptor.colorAttachments[0].destinationAlphaBlendFactor = MTLBlendFactorOneMinusSourceAlpha;
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renderer->pipeline_state = [renderer->device newRenderPipelineStateWithDescriptor:pipeline_state_descriptor
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error:&error];
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}
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if (error != nil){
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return(false);
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}
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Assert(error == nil);
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// NOTE(yuval): Create the command queue
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renderer->command_queue = [renderer->device newCommandQueue];
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@ -266,17 +169,20 @@ metal_init(Metal_Renderer *renderer, MTKView *view){
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options:options];
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}
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return(true);
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// NOTE(yuval): Create a capture scope for gpu frame capture
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renderer->capture_scope = [[MTLCaptureManager sharedCaptureManager]
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newCaptureScopeWithDevice:renderer->device];
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renderer->capture_scope.label = @"4coder Metal Capture Scope";
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}
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function void
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metal_render(Metal_Renderer *renderer, Render_Target *t){
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static const AAPLVertex triangleVertices[] = {
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// 2D positions, RGBA colors
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{ { 200, 100 }, { 1, 0, 0, 1 } },
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{ { 100, 100 }, { 0, 1, 0, 1 } },
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{ { 150, 200 }, { 0, 0, 1, 1 } },
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};
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[renderer->capture_scope beginScope];
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i32 width = t->width;
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i32 height = t->height;
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Font_Set* font_set = (Font_Set*)t->font_set;
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// NOTE(yuval): Create the command buffer
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id<MTLCommandBuffer> command_buffer = [renderer->command_queue commandBuffer];
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@ -285,79 +191,95 @@ metal_render(Metal_Renderer *renderer, Render_Target *t){
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// NOTE(yuval): Obtain the render pass descriptor from the renderer's view
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MTLRenderPassDescriptor *render_pass_descriptor = renderer->view.currentRenderPassDescriptor;
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if (render_pass_descriptor != nil){
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render_pass_descriptor.colorAttachments[0].clearColor = MTLClearColorMake(1.0f, 0.0f, 1.0f, 1.0f);
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// NOTE(yuval): Create the render command encoder
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id<MTLRenderCommandEncoder> render_encoder
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= [command_buffer renderCommandEncoderWithDescriptor:render_pass_descriptor];
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render_encoder.label = @"4coder Render Encoder";
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// NOTE(yuval): Set the region of the drawable to draw into
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[render_encoder setViewport:(MTLViewport){0.0, 0.0, (double)t->width, (double)t->height, 0.0, 1.0}];
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[render_encoder setViewport:(MTLViewport){0.0, 0.0, (double)width, (double)height, 0.0, 1.0}];
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// NOTE(yuval): Set the render pipeline to use for drawing
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[render_encoder setRenderPipelineState:renderer->pipeline_state];
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// NOTE(yuval): Pass in the parameter data
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[render_encoder setVertexBytes:triangleVertices
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length:sizeof(triangleVertices)
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atIndex:AAPLVertexInputIndexVertices];
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#if 0
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vector_uint2 viewport_size = {(u32)t->width, (u32)t->height};
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[render_encoder setVertexBytes:&viewport_size
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length:sizeof(viewport_size)
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atIndex:AAPLVertexInputIndexViewportSize];
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#else
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float left = 0, right = (float)t->width;
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float bottom = 0, top = (float)t->height;
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// NOTE(yuval): Calculate and pass in the projection matrix
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float left = 0, right = (float)width;
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float bottom = (float)height, top = 0;
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float near_depth = -1.0f, far_depth = 1.0f;
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float m[16] = {
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float proj[16] = {
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2.0f / (right - left), 0.0f, 0.0f, 0.0f,
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0.0f, 2.0f / (top - bottom), 0.0f, 0.0f,
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0.0f, 0.0f, -1.0f / (far_depth - near_depth), 0.0f,
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-((right + left) / (right - left)), -((top + bottom) / (top - bottom)),
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(-near_depth) / (far_depth - near_depth), 1.0f
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-(near_depth / (far_depth - near_depth)), 1.0f
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};
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float sLength = 1.0f / (right - left);
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float sHeight = 1.0f / (top - bottom);
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float sDepth = 1.0f / (far_depth - near_depth);
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for (Render_Group *group = t->group_first;
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group;
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group = group->next){
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// NOTE(yuval): Set scissor rect
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{
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Rect_i32 box = Ri32(group->clip_box);
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MTLScissorRect scissor_rect;
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simd::float4 P;
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simd::float4 Q;
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simd::float4 R;
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simd::float4 S;
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CGSize frame = [renderer->view drawableSize];
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printf("Drawable Size - w:%f h:%f\n", frame.width, frame.height);
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P.x = 2.0f * sLength;
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P.y = 0.0f;
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P.z = 0.0f;
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P.w = 0.0f;
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NSUInteger x0 = (NSUInteger)Min(Max(0, box.x0), frame.width - 1);
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NSUInteger x1 = (NSUInteger)Min(Max(0, box.x1), frame.width);
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NSUInteger y0 = (NSUInteger)Min(Max(0, box.y0), frame.height - 1);
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NSUInteger y1 = (NSUInteger)Min(Max(0, box.y1), frame.height);
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Q.x = 0.0f;
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Q.y = 2.0f * sHeight;
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Q.z = 0.0f;
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Q.w = 0.0f;
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scissor_rect.x = x0;
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scissor_rect.y = y0;
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scissor_rect.width = (x1 - x0);
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scissor_rect.height = (y1 - y0);
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R.x = 0.0f;
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R.y = 0.0f;
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R.z = sDepth;
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R.w = 0.0f;
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[render_encoder setScissorRect:scissor_rect];
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}
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S.x = -((right + left) / (right - left));
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S.y = -((top + bottom) / (top - bottom));
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S.z = -near_depth * sDepth;
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S.w = 1.0f;
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i32 vertex_count = group->vertex_list.vertex_count;
|
||||
if (vertex_count > 0){
|
||||
// TODO(yuval): Bind a texture
|
||||
{
|
||||
Face* face = font_set_face_from_id(font_set, group->face_id);
|
||||
if (face != 0){
|
||||
// TODO(yuval): Bind face texture
|
||||
} else{
|
||||
// TODO(yuval): Bind default texture
|
||||
}
|
||||
}
|
||||
|
||||
simd_float4x4 proj = simd::float4x4(P, Q, R, S);
|
||||
// NOTE(yuval): Copy the vertex data to the vertex buffer
|
||||
{
|
||||
u8 *cursor = (u8*)[renderer->buffer contents];
|
||||
for (Render_Vertex_Array_Node *node = group->vertex_list.first;
|
||||
node;
|
||||
node = node->next){
|
||||
i32 size = node->vertex_count * sizeof(*node->vertices);
|
||||
memcpy(cursor, node->vertices, size);
|
||||
cursor += size;
|
||||
}
|
||||
}
|
||||
|
||||
// NOTE(yuval): Pass the vertex buffer to the vertex shader
|
||||
[render_encoder setVertexBuffer:renderer->buffer
|
||||
offset:0
|
||||
atIndex:0];
|
||||
|
||||
// NOTE(yuval): Pass the projection matrix to the vertex shader
|
||||
[render_encoder setVertexBytes:&proj
|
||||
length:sizeof(proj)
|
||||
atIndex:AAPLVertexInputIndexViewportSize];
|
||||
#endif
|
||||
atIndex:1];
|
||||
|
||||
// NOTE(yuval): Draw the triangle
|
||||
// NOTE(yuval): Draw the vertices
|
||||
[render_encoder drawPrimitives:MTLPrimitiveTypeTriangle
|
||||
vertexStart:0
|
||||
vertexCount:3];
|
||||
vertexCount:vertex_count];
|
||||
}
|
||||
}
|
||||
|
||||
[render_encoder endEncoding];
|
||||
|
||||
|
|
@ -366,4 +288,6 @@ metal_render(Metal_Renderer *renderer, Render_Target *t){
|
|||
}
|
||||
|
||||
[command_buffer commit];
|
||||
|
||||
[renderer->capture_scope endScope];
|
||||
}
|
||||
|
|
@ -12,14 +12,6 @@ Header containing types and enum constants shared between Metal shaders and C/Ob
|
|||
#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
|
||||
|
|
|
|||
|
|
@ -129,7 +129,7 @@ sd = abs(sd + half_thickness) - half_thickness;
|
|||
float shape_value = 1.0 - smoothstep(-1.0, 0.0, sd);
|
||||
shape_value *= has_thickness;
|
||||
|
||||
out_color = vec4(fragment_color.xyz, fragment_color.a*(sample_value + shape_value));
|
||||
out_color = fragment_color;//vec4(fragment_color.xyz, fragment_color.a*(sample_value + shape_value));
|
||||
}
|
||||
)foo";
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue