Add TimeInterpolator support to RNA
Bug: 14678626
Change-Id: I6554e7fcd42c49fac3618ca792083bb68e358f55
diff --git a/libs/hwui/Interpolator.cpp b/libs/hwui/Interpolator.cpp
index 004ddf5..b56648e 100644
--- a/libs/hwui/Interpolator.cpp
+++ b/libs/hwui/Interpolator.cpp
@@ -13,9 +13,15 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
+
+#define LOG_TAG "Interpolator"
+
#include "Interpolator.h"
#include <math.h>
+#include <cutils/log.h>
+
+#include "utils/MathUtils.h"
namespace android {
namespace uirenderer {
@@ -28,5 +34,34 @@
return (float)(cosf((input + 1) * M_PI) / 2.0f) + 0.5f;
}
+LUTInterpolator::LUTInterpolator(float* values, size_t size) {
+ mValues = values;
+ mSize = size;
+}
+
+LUTInterpolator::~LUTInterpolator() {
+ delete mValues;
+ mValues = 0;
+}
+
+float LUTInterpolator::interpolate(float input) {
+ float lutpos = input * mSize;
+ if (lutpos >= (mSize - 1)) {
+ return mValues[mSize - 1];
+ }
+
+ float ipart, weight;
+ weight = modff(lutpos, &ipart);
+
+ int i1 = (int) ipart;
+ int i2 = MathUtils::min(i1 + 1, mSize - 1);
+
+ float v1 = mValues[i1];
+ float v2 = mValues[i2];
+
+ return MathUtils::lerp(v1, v2, weight);
+}
+
+
} /* namespace uirenderer */
} /* namespace android */