xref: /aosp_15_r20/external/skia/src/gpu/graphite/mtl/MtlBackendTexture.mm (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17) 
1/*
2 * Copyright 2024 Google LLC
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#include "include/core/SkString.h"
8#include "include/gpu/MutableTextureState.h"
9#include "include/gpu/graphite/mtl/MtlGraphiteTypes.h"
10#include "src/gpu/graphite/BackendTexturePriv.h"
11#include "src/gpu/graphite/mtl/MtlGraphiteTypesPriv.h"
12#include "src/gpu/mtl/MtlUtilsPriv.h"
13
14#include <cstdint>
15
16#import <Metal/Metal.h>
17
18namespace skgpu::graphite {
19
20class MtlBackendTextureData final : public BackendTextureData {
21public:
22    MtlBackendTextureData(CFTypeRef tex) : fMtlTexture(tex) {}
23
24#if defined(SK_DEBUG)
25    skgpu::BackendApi type() const override { return skgpu::BackendApi::kMetal; }
26#endif
27
28    CFTypeRef texture() const { return fMtlTexture; }
29
30private:
31    CFTypeRef fMtlTexture;
32
33    void copyTo(AnyBackendTextureData& dstData) const override {
34        // Don't assert that dstData is a metal type because it could be
35        // uninitialized and that assert would fail.
36        dstData.emplace<MtlBackendTextureData>(fMtlTexture);
37    }
38
39    bool equal(const BackendTextureData* that) const override {
40        SkASSERT(!that || that->type() == skgpu::BackendApi::kMetal);
41        if (auto otherMtl = static_cast<const MtlBackendTextureData*>(that)) {
42            return fMtlTexture == otherMtl->fMtlTexture;
43        }
44        return false;
45    }
46};
47
48static const MtlBackendTextureData* get_and_cast_data(const BackendTexture& tex) {
49    auto data = BackendTexturePriv::GetData(tex);
50    SkASSERT(!data || data->type() == skgpu::BackendApi::kMetal);
51    return static_cast<const MtlBackendTextureData*>(data);
52}
53
54namespace BackendTextures {
55BackendTexture MakeMetal(SkISize dimensions, CFTypeRef mtlTexture) {
56    return BackendTexturePriv::Make(
57            dimensions, TextureInfos::MakeMetal(mtlTexture), MtlBackendTextureData(mtlTexture));
58}
59
60CFTypeRef GetMtlTexture(const BackendTexture& tex) {
61    if (!tex.isValid() || tex.backend() != skgpu::BackendApi::kMetal) {
62        return nullptr;
63    }
64    const MtlBackendTextureData* mtlData = get_and_cast_data(tex);
65    SkASSERT(mtlData);
66    return mtlData->texture();
67}
68
69}  // namespace BackendTextures
70
71}  // namespace skgpu::graphite
72