| 20 | } |
| 21 | |
| 22 | IODevicePtr MemoryAssetSource::open(String const& path) { |
| 23 | struct AssetReader : public IODevice { |
| 24 | AssetReader(char* assetData, size_t assetSize, String name) { |
| 25 | this->assetData = assetData; |
| 26 | this->assetSize = assetSize; |
| 27 | this->name = std::move(name); |
| 28 | setMode(IOMode::Read); |
| 29 | } |
| 30 | |
| 31 | size_t read(char* data, size_t len) override { |
| 32 | len = min<StreamOffset>(len, StreamOffset(assetSize) - assetPos); |
| 33 | memcpy(data, assetData + assetPos, len); |
| 34 | assetPos += len; |
| 35 | return len; |
| 36 | } |
| 37 | |
| 38 | size_t write(char const*, size_t) override { |
| 39 | throw IOException("Assets IODevices are read-only"); |
| 40 | } |
| 41 | |
| 42 | StreamOffset size() override { return assetSize; } |
| 43 | StreamOffset pos() override { return assetPos; } |
| 44 | |
| 45 | String deviceName() const override { return name; } |
| 46 | |
| 47 | bool atEnd() override { |
| 48 | return assetPos >= (StreamOffset)assetSize; |
| 49 | } |
| 50 | |
| 51 | void seek(StreamOffset p, IOSeek mode) override { |
| 52 | if (mode == IOSeek::Absolute) |
| 53 | assetPos = p; |
| 54 | else if (mode == IOSeek::Relative) |
| 55 | assetPos = clamp<StreamOffset>(assetPos + p, 0, assetSize); |
| 56 | else |
| 57 | assetPos = clamp<StreamOffset>(assetPos - p, 0, assetSize); |
| 58 | } |
| 59 | |
| 60 | IODevicePtr clone() override { |
| 61 | auto cloned = make_shared<AssetReader>(assetData, assetSize, name); |
| 62 | cloned->assetPos = assetPos; |
| 63 | return cloned; |
| 64 | } |
| 65 | |
| 66 | char* assetData; |
| 67 | size_t assetSize; |
| 68 | StreamOffset assetPos = 0; |
| 69 | String name; |
| 70 | }; |
| 71 | |
| 72 | auto p = m_files.ptr(path); |
| 73 | if (!p) |
| 74 | throw AssetSourceException::format("Requested file '{}' does not exist in memory", path); |
| 75 | else if (auto byteArray = p->ptr<ByteArray>()) |
| 76 | return make_shared<AssetReader>(byteArray->ptr(), byteArray->size(), path); |
| 77 | else { |
| 78 | auto image = p->get<ImagePtr>().get(); |
| 79 | return make_shared<AssetReader>((char*)image->data(), image->width() * image->height() * image->bytesPerPixel(), path); |