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Diffstat (limited to 'cmds/stagefright/filters/nightvision.rs')
-rw-r--r-- | cmds/stagefright/filters/nightvision.rs | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/cmds/stagefright/filters/nightvision.rs b/cmds/stagefright/filters/nightvision.rs new file mode 100644 index 0000000..f61413c --- /dev/null +++ b/cmds/stagefright/filters/nightvision.rs @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2014 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. + */ + +#pragma version(1) +#pragma rs java_package_name(com.android.rs.cppbasic) +#pragma rs_fp_relaxed + +const static float3 gMonoMult = {0.299f, 0.587f, 0.114f}; +const static float3 gNightVisionMult = {0.5f, 1.f, 0.5f}; + +// calculates luminance of pixel, then biases color balance toward green +void root(const uchar4 *v_in, uchar4 *v_out) { + v_out->x = v_in->x; // don't modify A + + // get RGB, scale 0-255 uchar to 0-1.0 float + float3 rgb = {v_in->y * 0.003921569f, v_in->z * 0.003921569f, + v_in->w * 0.003921569f}; + + // apply filter + float3 result = dot(rgb, gMonoMult) * gNightVisionMult; + + v_out->y = (uchar)clamp((result.r * 255.f + 0.5f), 0.f, 255.f); + v_out->z = (uchar)clamp((result.g * 255.f + 0.5f), 0.f, 255.f); + v_out->w = (uchar)clamp((result.b * 255.f + 0.5f), 0.f, 255.f); +} |