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1/*
2 * Copyright 2017 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "GrMtlRenderTarget.h"
9
10#include "GrMtlGpu.h"
11#include "GrMtlUtil.h"
12
13sk_sp<GrMtlRenderTarget> GrMtlRenderTarget::CreateNewRenderTarget(GrMtlGpu* gpu,
14                                                                  const GrSurfaceDesc& desc,
15                                                                  SkBudgeted budgeted) {
16    MTLPixelFormat format;
17    if (!GrPixelConfigToMTLFormat(desc.fConfig, &format)) {
18        return nullptr;
19    }
20
21    if (desc.fSampleCnt) {
22        return nullptr;
23    }
24
25    MTLTextureDescriptor* descriptor = [[MTLTextureDescriptor alloc] init];
26    descriptor.textureType = MTLTextureType2D;
27    descriptor.pixelFormat = format;
28    descriptor.width = desc.fWidth;
29    descriptor.height = desc.fHeight;
30    descriptor.depth = 1;
31    descriptor.mipmapLevelCount = 1;
32    descriptor.sampleCount = 1;
33    descriptor.arrayLength = 1;
34    // descriptor.resourceOptions This looks to be set by setting cpuCacheMode and storageModes
35    descriptor.cpuCacheMode = MTLCPUCacheModeWriteCombined;
36    // RenderTargets never need to be mapped so their storage mode is set to private
37    descriptor.storageMode = MTLStorageModePrivate;
38
39    descriptor.usage = MTLTextureUsageRenderTarget;
40
41    id<MTLTexture> texture = [gpu->device() newTextureWithDescriptor:descriptor];
42
43    return sk_sp<GrMtlRenderTarget>(new GrMtlRenderTarget(gpu, desc, budgeted, texture));
44}
45
46GrMtlRenderTarget::GrMtlRenderTarget(GrMtlGpu* gpu,
47                                     const GrSurfaceDesc& desc,
48                                     SkBudgeted budgeted,
49                                     id<MTLTexture> renderTexture)
50        : GrSurface(gpu, desc)
51        , GrRenderTarget(gpu, desc)
52        , fRenderTexture(renderTexture)
53        , fResolveTexture(nil) {
54}
55
56GrMtlRenderTarget::~GrMtlRenderTarget() {
57    SkASSERT(nil == fRenderTexture);
58    SkASSERT(nil == fResolveTexture);
59}
60
61GrMtlGpu* GrMtlRenderTarget::getMtlGpu() const {
62    SkASSERT(!this->wasDestroyed());
63    return static_cast<GrMtlGpu*>(this->getGpu());
64}
65
66GrBackendObject GrMtlRenderTarget::getRenderTargetHandle() const {
67    void* voidRT = (__bridge_retained void*)fRenderTexture;
68    return (GrBackendObject)voidRT;
69}
70
71void GrMtlRenderTarget::onAbandon() {
72    fRenderTexture = nil;
73    fResolveTexture = nil;
74}
75
76void GrMtlRenderTarget::onRelease() {
77    fRenderTexture = nil;
78    fResolveTexture = nil;
79}
80
81bool completeStencilAttachment() {
82    // TODO: fill this out
83    return true;
84}
85
86
87