| /* |
| * 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.GLFrame; |
| import android.filterfw.core.NativeProgram; |
| import android.filterfw.core.NativeFrame; |
| import android.filterfw.core.Program; |
| import android.filterfw.core.ShaderProgram; |
| import android.filterfw.geometry.Quad; |
| import android.filterfw.format.ImageFormat; |
| import android.filterfw.format.ObjectFormat; |
| |
| import android.opengl.GLES20; |
| |
| /** |
| * @hide |
| */ |
| public class DrawRectFilter extends Filter { |
| |
| @GenerateFieldPort(name = "colorRed", hasDefault = true) |
| private float mColorRed = 0.8f; |
| |
| @GenerateFieldPort(name = "colorGreen", hasDefault = true) |
| private float mColorGreen = 0.8f; |
| |
| @GenerateFieldPort(name = "colorBlue", hasDefault = true) |
| private float mColorBlue = 0.0f; |
| |
| private final String mVertexShader = |
| "attribute vec4 aPosition;\n" + |
| "void main() {\n" + |
| " gl_Position = aPosition;\n" + |
| "}\n"; |
| |
| private final String mFixedColorFragmentShader = |
| "precision mediump float;\n" + |
| "uniform vec4 color;\n" + |
| "void main() {\n" + |
| " gl_FragColor = color;\n" + |
| "}\n"; |
| |
| private ShaderProgram mProgram; |
| |
| |
| public DrawRectFilter(String name) { |
| super(name); |
| } |
| |
| @Override |
| public void setupPorts() { |
| addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA, |
| FrameFormat.TARGET_GPU)); |
| addMaskedInputPort("box", ObjectFormat.fromClass(Quad.class, FrameFormat.TARGET_SIMPLE)); |
| addOutputBasedOnInput("image", "image"); |
| } |
| |
| @Override |
| public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { |
| return inputFormat; |
| } |
| |
| @Override |
| public void prepare(FilterContext context) { |
| mProgram = new ShaderProgram(context, mVertexShader, mFixedColorFragmentShader); |
| } |
| |
| @Override |
| public void process(FilterContext env) { |
| // Get input frame |
| Frame imageFrame = pullInput("image"); |
| Frame boxFrame = pullInput("box"); |
| |
| // Get the box |
| Quad box = (Quad)boxFrame.getObjectValue(); |
| box = box.scaled(2.0f).translated(-1.0f, -1.0f); |
| |
| // Create output frame with copy of input |
| GLFrame output = (GLFrame)env.getFrameManager().duplicateFrame(imageFrame); |
| |
| // Draw onto output |
| output.focus(); |
| renderBox(box); |
| |
| // Push output |
| pushOutput("image", output); |
| |
| // Release pushed frame |
| output.release(); |
| } |
| |
| private void renderBox(Quad box) { |
| final int FLOAT_SIZE = 4; |
| |
| // Get current values |
| float[] color = {mColorRed, mColorGreen, mColorBlue, 1f}; |
| float[] vertexValues = { box.p0.x, box.p0.y, |
| box.p1.x, box.p1.y, |
| box.p3.x, box.p3.y, |
| box.p2.x, box.p2.y }; |
| |
| // Set the program variables |
| mProgram.setHostValue("color", color); |
| mProgram.setAttributeValues("aPosition", vertexValues, 2); |
| mProgram.setVertexCount(4); |
| |
| // Draw |
| mProgram.beginDrawing(); |
| GLES20.glLineWidth(1.0f); |
| GLES20.glDrawArrays(GLES20.GL_LINE_LOOP, 0, 4); |
| } |
| } |