1// Copyright 2019 Google LLC.
2// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3
4#include "tools/skottie_ios_app/SkMetalViewBridge.h"
5
6#include "include/core/SkSurface.h"
7#include "include/gpu/GrBackendSurface.h"
8#include "include/gpu/GrContextOptions.h"
9#include "include/gpu/GrDirectContext.h"
10#include "include/gpu/mtl/GrMtlTypes.h"
11
12#import <Metal/Metal.h>
13#import <MetalKit/MetalKit.h>
14
15sk_sp<SkSurface> SkMtkViewToSurface(MTKView* mtkView, GrRecordingContext* rContext) {
16    if (!rContext ||
17        MTLPixelFormatDepth32Float_Stencil8 != [mtkView depthStencilPixelFormat] ||
18        MTLPixelFormatBGRA8Unorm != [mtkView colorPixelFormat]) {
19        return nullptr;
20    }
21
22    const SkColorType colorType = kBGRA_8888_SkColorType;  // MTLPixelFormatBGRA8Unorm
23    sk_sp<SkColorSpace> colorSpace = nullptr;  // MTLPixelFormatBGRA8Unorm
24    const GrSurfaceOrigin origin = kTopLeft_GrSurfaceOrigin;
25    const SkSurfaceProps surfaceProps;
26    int sampleCount = (int)[mtkView sampleCount];
27
28    return SkSurface::MakeFromMTKView(rContext, (__bridge GrMTLHandle)mtkView, origin, sampleCount,
29                                      colorType, colorSpace, &surfaceProps);
30}
31
32GrContextHolder SkMetalDeviceToGrContext(id<MTLDevice> device, id<MTLCommandQueue> queue) {
33    GrContextOptions grContextOptions;  // set different options here.
34    return GrContextHolder(GrDirectContext::MakeMetal((__bridge void*)device,
35                                                      (__bridge void*)queue,
36                                                      grContextOptions).release());
37}
38
39void SkMtkViewConfigForSkia(MTKView* mtkView) {
40    [mtkView setDepthStencilPixelFormat:MTLPixelFormatDepth32Float_Stencil8];
41    [mtkView setColorPixelFormat:MTLPixelFormatBGRA8Unorm];
42    [mtkView setSampleCount:1];
43}
44