From b3899e5147fcff81be43469d9d6e8e56fc5aaac8 Mon Sep 17 00:00:00 2001
From: Craig Donner <cdonner@google.com>
Date: Wed, 27 Dec 2017 14:59:29 -0800
Subject: Add new AHardwareBuffer formats and usages with latest HAL change.

Bug: 66900669
Test: build, and added validation logic to Gralloc2 and
GrallocBufferMapper.
Change-Id: I374155851fa575a3482084a8b7fbc8f9026b6148
---
 libs/ui/Gralloc2.cpp | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

(limited to 'libs/ui/Gralloc2.cpp')

diff --git a/libs/ui/Gralloc2.cpp b/libs/ui/Gralloc2.cpp
index 1f746a2ed1..deaf8d3024 100644
--- a/libs/ui/Gralloc2.cpp
+++ b/libs/ui/Gralloc2.cpp
@@ -20,6 +20,7 @@
 #include <hwbinder/IPCThreadState.h>
 #include <ui/Gralloc2.h>
 
+#include <inttypes.h>
 #include <log/log.h>
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wzero-length-array"
@@ -30,8 +31,37 @@ namespace android {
 
 namespace Gralloc2 {
 
+namespace {
+
 static constexpr Error kTransactionError = Error::NO_RESOURCES;
 
+uint64_t getValid10UsageBits() {
+    static const uint64_t valid10UsageBits = []() -> uint64_t {
+        using hardware::graphics::common::V1_0::BufferUsage;
+        uint64_t bits = 0;
+        for (const auto bit : hardware::hidl_enum_iterator<BufferUsage>()) {
+            bits = bits | bit;
+        }
+        return bits;
+    }();
+    return valid10UsageBits;
+}
+
+uint64_t getValid11UsageBits() {
+    static const uint64_t valid11UsageBits = []() -> uint64_t {
+        using hardware::graphics::common::V1_1::BufferUsage;
+        uint64_t bits = 0;
+        for (const auto bit : hardware::hidl_enum_iterator<BufferUsage>()) {
+            bits = bits | bit;
+        }
+        // Return only the overlapping bits.
+        return bits & ~getValid10UsageBits();
+    }();
+    return valid11UsageBits;
+}
+
+}  // anonymous namespace
+
 void Mapper::preload() {
     android::hardware::preloadPassthroughService<hardware::graphics::mapper::V2_0::IMapper>();
 }
@@ -50,11 +80,39 @@ Mapper::Mapper()
     mMapperV2_1 = hardware::graphics::mapper::V2_1::IMapper::castFrom(mMapper);
 }
 
+Gralloc2::Error Mapper::validateBufferDescriptorInfo(
+        const IMapper::BufferDescriptorInfo& descriptorInfo) const {
+    uint64_t validUsageBits = getValid10UsageBits();
+    if (mMapperV2_1 != nullptr) {
+        validUsageBits = validUsageBits | getValid11UsageBits();
+    }
+
+    if (descriptorInfo.usage & ~validUsageBits) {
+        ALOGE("buffer descriptor contains invalid usage bits 0x%" PRIx64,
+              descriptorInfo.usage & ~validUsageBits);
+        return Error::BAD_VALUE;
+    }
+    return Error::NONE;
+}
+
 Error Mapper::createDescriptor(
         const IMapper::BufferDescriptorInfo& descriptorInfo,
         BufferDescriptor* outDescriptor) const
 {
     Error error;
+
+    if (descriptorInfo.usage & getValid11UsageBits()) {
+        // TODO(b/66900669): Use mMapperV2_1->createDescriptorV2_1().
+        ALOGW("full support for new usage bits is unimplemented 0x%" PRIx64,
+              descriptorInfo.usage & getValid11UsageBits());
+        return Error::BAD_VALUE;
+    }
+
+    error = validateBufferDescriptorInfo(descriptorInfo);
+    if (error != Error::NONE) {
+        return error;
+    }
+
     auto ret = mMapper->createDescriptor(descriptorInfo,
             [&](const auto& tmpError, const auto& tmpDescriptor)
             {
-- 
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