125 lines
4.3 KiB
Objective-C
125 lines
4.3 KiB
Objective-C
/*************************************************************************
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*
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* Orca
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* Copyright 2023 Martin Fouilleul and the Orca project contributors
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* See LICENSE.txt for licensing information
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*
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**************************************************************************/
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#include <stdlib.h>
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#include <string.h>
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#define _USE_MATH_DEFINES //NOTE: necessary for MSVC
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#include <math.h>
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#include "orca.h"
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#include "graphics/mtl_surface.h"
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#import <Metal/Metal.h>
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#import <QuartzCore/CAMetalLayer.h>
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#include "vertex.h"
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static const my_vertex triangle[3] = { { { 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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int main()
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{
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oc_init();
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oc_rect rect = { .x = 100, .y = 100, .w = 800, .h = 600 };
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oc_window window = oc_window_create(rect, OC_STR8("test"), 0);
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//NOTE: create surface
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oc_surface surface = oc_surface_create_for_window(window, OC_METAL);
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//NOTE(martin): load the library
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id<MTLDevice> device = MTLCreateSystemDefaultDevice();
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oc_str8 shaderPath = oc_path_executable_relative(oc_scratch(), OC_STR8("triangle_shader.metallib"));
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const char* shaderPathCString = oc_str8_to_cstring(oc_scratch(), shaderPath);
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NSString* metalFileName = [[NSString alloc] initWithCString:shaderPathCString encoding:NSUTF8StringEncoding];
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NSError* err = 0;
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id<MTLLibrary> library = [device newLibraryWithFile:metalFileName error:&err];
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if(err != nil)
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{
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const char* errStr = [[err localizedDescription] UTF8String];
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printf("error : %s\n", errStr);
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return (-1);
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}
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id<MTLFunction> vertexFunction = [library newFunctionWithName:@"VertexShader"];
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id<MTLFunction> fragmentFunction = [library newFunctionWithName:@"FragmentShader"];
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//NOTE(martin): create a render pipeline
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MTLRenderPipelineDescriptor* pipelineStateDescriptor = [[MTLRenderPipelineDescriptor alloc] init];
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pipelineStateDescriptor.label = @"My simple pipeline";
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pipelineStateDescriptor.vertexFunction = vertexFunction;
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pipelineStateDescriptor.fragmentFunction = fragmentFunction;
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CAMetalLayer* layer = oc_mtl_surface_layer(surface);
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pipelineStateDescriptor.colorAttachments[0].pixelFormat = layer.pixelFormat;
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id<MTLRenderPipelineState> pipelineState = [device newRenderPipelineStateWithDescriptor:pipelineStateDescriptor error:&err];
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if(err != nil)
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{
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const char* errStr = [[err localizedDescription] UTF8String];
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printf("error : %s\n", errStr);
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return (-1);
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}
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// start app
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oc_window_bring_to_front(window);
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oc_window_focus(window);
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while(!oc_should_quit())
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{
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oc_pump_events(0);
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oc_event* event = 0;
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while((event = oc_next_event(oc_scratch())) != 0)
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{
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switch(event->type)
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{
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case OC_EVENT_WINDOW_CLOSE:
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{
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oc_request_quit();
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}
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break;
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default:
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break;
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}
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oc_arena_clear(oc_scratch());
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}
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vector_uint2 viewportSize;
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viewportSize.x = 800;
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viewportSize.y = 600;
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oc_surface_select(surface);
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id<CAMetalDrawable> drawable = oc_mtl_surface_drawable(surface);
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id<MTLCommandBuffer> commandBuffer = oc_mtl_surface_command_buffer(surface);
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MTLRenderPassDescriptor* renderPassDescriptor = [MTLRenderPassDescriptor renderPassDescriptor];
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renderPassDescriptor.colorAttachments[0].texture = drawable.texture;
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renderPassDescriptor.colorAttachments[0].storeAction = MTLStoreActionStore;
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id<MTLRenderCommandEncoder> encoder = [commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor];
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//Set the pipeline state
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[encoder setRenderPipelineState:pipelineState];
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//Send data to the shader and add draw call
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[encoder setVertexBytes:triangle length:sizeof(triangle) atIndex:vertexInputIndexVertices];
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[encoder setVertexBytes:&viewportSize length:sizeof(viewportSize) atIndex:vertexInputIndexViewportSize];
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[encoder drawPrimitives:MTLPrimitiveTypeTriangle vertexStart:0 vertexCount:3];
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[encoder endEncoding];
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oc_surface_present(surface);
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}
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oc_terminate();
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return (0);
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}
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