1 files changed, 37 insertions, 0 deletions
diff --git a/tests/RenderScriptTests/ImageProcessing_jb/src/com/android/rs/image/contrast.rs b/tests/RenderScriptTests/ImageProcessing_jb/src/com/android/rs/image/contrast.rs
new file mode 100644
index 0000000..d3743d3
--- /dev/null
+++ b/tests/RenderScriptTests/ImageProcessing_jb/src/com/android/rs/image/contrast.rs
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2012 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 "ip.rsh"
+
+static float brightM = 0.f;
+static float brightC = 0.f;
+
+void setBright(float v) {
+    brightM = pow(2.f, v / 100.f);
+    brightC = 127.f - brightM * 127.f;
+}
+
+void contrast(const uchar4 *in, uchar4 *out)
+{
+#if 0
+    out->r = rsClamp((int)(brightM * in->r + brightC), 0, 255);
+    out->g = rsClamp((int)(brightM * in->g + brightC), 0, 255);
+    out->b = rsClamp((int)(brightM * in->b + brightC), 0, 255);
+#else
+    float3 v = convert_float3(in->rgb) * brightM + brightC;
+    out->rgb = convert_uchar3(clamp(v, 0.f, 255.f));
+#endif
+}