1 files changed, 140 insertions, 0 deletions
diff --git a/media/mca/filterpacks/java/android/filterpacks/imageproc/FillLightFilter.java b/media/mca/filterpacks/java/android/filterpacks/imageproc/FillLightFilter.java
new file mode 100644
index 0000000..fc917a1
--- /dev/null
+++ b/media/mca/filterpacks/java/android/filterpacks/imageproc/FillLightFilter.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+package android.filterpacks.imageproc;
+
+import android.filterfw.core.Filter;
+import android.filterfw.core.FilterContext;
+import android.filterfw.core.Frame;
+import android.filterfw.core.FrameFormat;
+import android.filterfw.core.GenerateFieldPort;
+import android.filterfw.core.GenerateFinalPort;
+import android.filterfw.core.KeyValueMap;
+import android.filterfw.core.NativeProgram;
+import android.filterfw.core.NativeFrame;
+import android.filterfw.core.Program;
+import android.filterfw.core.ShaderProgram;
+import android.filterfw.format.ImageFormat;
+
+import android.util.Log;
+
+public class FillLightFilter extends Filter {
+
+    @GenerateFieldPort(name = "tile_size", hasDefault = true)
+    private int mTileSize = 640;
+
+    @GenerateFieldPort(name = "strength", hasDefault = true)
+    private float mBacklight = 0f;
+
+    private Program mProgram;
+
+    private int mTarget = FrameFormat.TARGET_UNSPECIFIED;
+
+    private final String mFillLightShader =
+            "precision mediump float;\n" +
+            "uniform sampler2D tex_sampler_0;\n" +
+            "uniform float mult;\n" +
+            "uniform float igamma;\n" +
+            "varying vec2 v_texcoord;\n" +
+            "void main()\n" +
+            "{\n" +
+            "  const vec3 color_weights = vec3(0.25, 0.5, 0.25);\n" +
+            "  vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" +
+            "  float lightmask = dot(color.rgb, color_weights);\n" +
+            "  float backmask = (1.0 - lightmask);\n" +
+            "  vec3 ones = vec3(1.0, 1.0, 1.0);\n" +
+            "  vec3 diff = pow(mult * color.rgb, igamma * ones) - color.rgb;\n" +
+            "  diff = min(diff, 1.0);\n" +
+            "  vec3 new_color = min(color.rgb + diff * backmask, 1.0);\n" +
+            "  gl_FragColor = vec4(new_color, color.a);\n" +
+            "}\n";
+
+    public FillLightFilter(String name) {
+      super(name);
+    }
+
+    @Override
+    public void setupPorts() {
+        addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA));
+        addOutputBasedOnInput("image", "image");
+    }
+
+    @Override
+    public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) {
+        return inputFormat;
+    }
+
+    public void initProgram(FilterContext context, int target) {
+        switch (target) {
+            case FrameFormat.TARGET_GPU:
+                ShaderProgram shaderProgram = new ShaderProgram(context, mFillLightShader);
+                Log.e("FillLight", "tile size: " + mTileSize);
+                shaderProgram.setMaximumTileSize(mTileSize);
+                mProgram = shaderProgram;
+                break;
+
+            default:
+                throw new RuntimeException("Filter FillLight does not support frames of " +
+                    "target " + target + "!");
+        }
+        mTarget = target;
+    }
+
+
+    @Override
+    public void process(FilterContext context) {
+        // Get input frame
+        Frame input = pullInput("image");
+        FrameFormat inputFormat = input.getFormat();
+
+        // Create output frame
+        Frame output = context.getFrameManager().newFrame(inputFormat);
+
+        // Create program if not created already
+        if (mProgram == null || inputFormat.getTarget() != mTarget) {
+            initProgram(context, inputFormat.getTarget());
+            updateParameters();
+        }
+
+        // Process
+        mProgram.process(input, output);
+
+        // Push output
+        pushOutput("image", output);
+
+        // Release pushed frame
+        output.release();
+    }
+
+
+    @Override
+    public void fieldPortValueUpdated(String name, FilterContext context) {
+        if (mProgram != null) {
+            updateParameters();
+        }
+    }
+
+    private void updateParameters() {
+        float fade_gamma = 0.3f;
+        float amt = 1.0f - mBacklight;
+        float mult = 1.0f / (amt * 0.7f + 0.3f);
+        float faded = fade_gamma + (1.0f -fade_gamma) *mult;
+        float igamma = 1.0f / faded;
+
+        mProgram.setHostValue("mult", mult);
+        mProgram.setHostValue("igamma", igamma);
+    }
+}