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Commit 8534b5cf authored by Jeremy Meyer's avatar Jeremy Meyer Committed by Android (Google) Code Review
Browse files

Merge "Revert "Revert "Always select the next higher density bucket when picking resources"""

parents d63ec172 5ac5c9bc

libs/androidfw/ResourceTypes.cpp

+4 −13
Original line number Diff line number Diff line
@@ -2677,30 +2677,21 @@ bool ResTable_config::isBetterThan(const ResTable_config& o, 
                // DENSITY_ANY is now dealt with. We should look to

                // pick a density bucket and potentially scale it.

                // Any density is potentially useful

                // because the system will scale it.  Scaling down

                // is generally better than scaling up.

                // because the system will scale it.  Always prefer

                // scaling down.

                int h = thisDensity;

                int l = otherDensity;

                bool bImBigger = true;

                if (l > h) {

                    int t = h;

                    h = l;

                    l = t;

                    std::swap(l, h);

                    bImBigger = false;

                }



                if (requestedDensity >= h) {

                    // requested value higher than both l and h, give h

                    return bImBigger;

                }

                if (l >= requestedDensity) {

                    // requested value lower than both l and h, give l

                    return !bImBigger;

                }

                // saying that scaling down is 2x better than up

                if (((2 * l) - requestedDensity) * h > requestedDensity * requestedDensity) {

                    return !bImBigger;

                } else {

                    // otherwise give h

                    return bImBigger;

                }

            }

libs/androidfw/tests/Config_test.cpp

+11 −4
Original line number Diff line number Diff line
@@ -27,15 +27,19 @@ namespace android { 


static ResTable_config selectBest(const ResTable_config& target,

                                  const Vector<ResTable_config>& configs) {

  ResTable_config bestConfig;

  memset(&bestConfig, 0, sizeof(bestConfig));

  Vector<ResTable_config> matchedConfigs;

  const size_t configCount = configs.size();

  for (size_t i = 0; i < configCount; i++) {

    const ResTable_config& thisConfig = configs[i];

    if (!thisConfig.match(target)) {

      continue;

    if (thisConfig.match(target)) {

      matchedConfigs.add(thisConfig);

    }

  }



  ResTable_config bestConfig = matchedConfigs[0];

  const size_t matchingConfigCount = matchedConfigs.size();

  for (size_t i = 1; i < matchingConfigCount; i++) {

    const ResTable_config& thisConfig = configs[i];

    if (thisConfig.isBetterThan(bestConfig, &target)) {

      bestConfig = thisConfig;

    }
@@ -75,6 +79,9 @@ TEST(ConfigTest, shouldSelectBestDensity) { 
  configs.add(buildDensityConfig(int(ResTable_config::DENSITY_HIGH) + 20));

  ASSERT_EQ(expectedBest, selectBest(deviceConfig, configs));



  configs.add(buildDensityConfig(int(ResTable_config::DENSITY_XHIGH) - 1));

  ASSERT_EQ(expectedBest, selectBest(deviceConfig, configs));



  expectedBest = buildDensityConfig(ResTable_config::DENSITY_XHIGH);

  configs.add(expectedBest);

  ASSERT_EQ(expectedBest, selectBest(deviceConfig, configs));