Merge "Add gralloc usage conversion functions" into oc-dev

// Copyright 2017 The Android Open Source Project

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

cc_library_static {

    name: "libgrallocusage",

    cppflags: [

        "-Weverything",

        "-Werror",

        "-Wno-c++98-compat-pedantic",

        // Hide errors in headers we include

        "-Wno-global-constructors",

        "-Wno-exit-time-destructors",

        "-Wno-padded",

    ],

    srcs: ["GrallocUsageConversion.cpp"],

    export_include_dirs: ["include"],

    shared_libs: ["android.hardware.graphics.allocator@2.0"],

}

/*

 * Copyright 2017 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <grallocusage/GrallocUsageConversion.h>

#include <android/hardware/graphics/allocator/2.0/types.h>

#include <hardware/gralloc.h>

using android::hardware::graphics::allocator::V2_0::ProducerUsage;

using android::hardware::graphics::allocator::V2_0::ConsumerUsage;

void android_convertGralloc0To1Usage(int32_t usage, uint64_t* producerUsage,

                                     uint64_t* consumerUsage) {

    constexpr uint64_t PRODUCER_MASK = ProducerUsage::CPU_READ |

                                       /* ProducerUsage::CPU_READ_OFTEN | */

                                       ProducerUsage::CPU_WRITE |

                                       /* ProducerUsage::CPU_WRITE_OFTEN | */

                                       ProducerUsage::GPU_RENDER_TARGET | ProducerUsage::PROTECTED |

                                       ProducerUsage::CAMERA | ProducerUsage::VIDEO_DECODER |

                                       ProducerUsage::SENSOR_DIRECT_DATA;

    constexpr uint64_t CONSUMER_MASK = ConsumerUsage::CPU_READ |

                                       /* ConsumerUsage::CPU_READ_OFTEN | */

                                       ConsumerUsage::GPU_TEXTURE | ConsumerUsage::HWCOMPOSER |

                                       ConsumerUsage::CLIENT_TARGET | ConsumerUsage::CURSOR |

                                       ConsumerUsage::VIDEO_ENCODER | ConsumerUsage::CAMERA |

                                       ConsumerUsage::RENDERSCRIPT | ConsumerUsage::GPU_DATA_BUFFER;

    *producerUsage = static_cast<uint64_t>(usage) & PRODUCER_MASK;

    *consumerUsage = static_cast<uint64_t>(usage) & CONSUMER_MASK;

    if ((static_cast<uint32_t>(usage) & GRALLOC_USAGE_SW_READ_OFTEN) == GRALLOC_USAGE_SW_READ_OFTEN) {

        *producerUsage |= ProducerUsage::CPU_READ_OFTEN;

        *consumerUsage |= ConsumerUsage::CPU_READ_OFTEN;

    }

    if ((static_cast<uint32_t>(usage) & GRALLOC_USAGE_SW_WRITE_OFTEN) ==

        GRALLOC_USAGE_SW_WRITE_OFTEN) {

        *producerUsage |= ProducerUsage::CPU_WRITE_OFTEN;

    }

}

int32_t android_convertGralloc1To0Usage(uint64_t producerUsage, uint64_t consumerUsage) {

    static_assert(uint64_t(ConsumerUsage::CPU_READ_OFTEN) == uint64_t(ProducerUsage::CPU_READ_OFTEN),

                  "expected ConsumerUsage and ProducerUsage CPU_READ_OFTEN bits to match");

    uint64_t merged = producerUsage | consumerUsage;

    if ((merged & (ConsumerUsage::CPU_READ_OFTEN)) != 0) {

        merged &= ~uint64_t(ConsumerUsage::CPU_READ_OFTEN);

        merged |= GRALLOC_USAGE_SW_READ_OFTEN;

    }

    if ((merged & (ProducerUsage::CPU_WRITE_OFTEN)) != 0) {

        merged &= ~uint64_t(ProducerUsage::CPU_WRITE_OFTEN);

        merged |= GRALLOC_USAGE_SW_WRITE_OFTEN;

    }

    return static_cast<int32_t>(merged);

}

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/*

 * Copyright 2017 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#ifndef ANDROID_GRALLOCUSAGE_GRALLOC_USAGE_CONVERSION_H

#define ANDROID_GRALLOCUSAGE_GRALLOC_USAGE_CONVERSION_H 1

#include <stdint.h>

#ifdef __cplusplus

extern "C" {

#endif

// Conversion functions are out-of-line so that users don't have to be exposed to

// android/hardware/graphics/allocator/2.0/types.h and link against

// android.hardware.graphics.allocator@2.0 to get that in their search path.

// Convert a 32-bit gralloc0 usage mask to a producer/consumer pair of 64-bit usage masks as used

// by android.hardware.graphics.allocator@2.0 (and gralloc1). This conversion properly handles the

// mismatch between a.h.g.allocator@2.0's CPU_{READ,WRITE}_OFTEN and gralloc0's

// SW_{READ,WRITE}_OFTEN.

void android_convertGralloc0To1Usage(int32_t usage, uint64_t* producerUsage,

                                     uint64_t* consumerUsage);

// Convert a producer/consumer pair of 64-bit usage masks as used by

// android.hardware.graphics.allocator@2.0 (and gralloc1) to a 32-bit gralloc0 usage mask. This

// conversion properly handles the mismatch between a.h.g.allocator@2.0's CPU_{READ,WRITE}_OFTEN

// and gralloc0's SW_{READ,WRITE}_OFTEN.

int32_t android_convertGralloc1To0Usage(uint64_t producerUsage, uint64_t consumerUsage);

#ifdef __cplusplus

}

#endif

#endif  // ANDROID_GRALLOCUSAGE_GRALLOC_USAGE_CONVERSION_H