[Remoting Android] Remove Cardboard Code

remoting/android/java/src/org/chromium/chromoting/cardboard/Desktop.java

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.chromoting.cardboard;
-
-import static org.chromium.chromoting.cardboard.CardboardUtil.makeFloatBuffer;
-import static org.chromium.chromoting.cardboard.CardboardUtil.makeRectangularTextureBuffer;
-
-import android.graphics.Bitmap;
-import android.graphics.Point;
-import android.opengl.GLES20;
-
-import org.chromium.chromoting.jni.Display;
-
-import java.nio.FloatBuffer;
-
-/**
- * Chromoting Cardboard activity desktop, which is used to display host desktop.
- */
-public class Desktop {
-    private static final String VERTEX_SHADER =
-            "uniform mat4 u_CombinedMatrix;"
-            + "attribute vec4 a_Position;"
-            + "attribute vec2 a_TexCoordinate;"
-            + "varying vec2 v_TexCoordinate;"
-            + "attribute float a_transparency;"
-            + "varying float v_transparency;"
-            + "void main() {"
-            + "  v_transparency = a_transparency;"
-            + "  v_TexCoordinate = a_TexCoordinate;"
-            + "  gl_Position = u_CombinedMatrix * a_Position;"
-            + "}";
-
-    private static final String FRAGMENT_SHADER =
-            "precision highp float;"
-            + "uniform sampler2D u_Texture;"
-            + "varying vec2 v_TexCoordinate;"
-            + "const float borderWidth = 0.002;"
-            + "varying float v_transparency;"
-            + "void main() {"
-            + "  if (v_TexCoordinate.x > (1.0 - borderWidth) || v_TexCoordinate.x < borderWidth"
-            + "      || v_TexCoordinate.y > (1.0 - borderWidth)"
-            + "      || v_TexCoordinate.y < borderWidth) {"
-            + "    gl_FragColor = vec4(1.0, 1.0, 1.0, v_transparency);"
-            + "  } else {"
-            + "    vec4 texture = texture2D(u_Texture, v_TexCoordinate);"
-            + "    gl_FragColor = vec4(texture.r, texture.g, texture.b, v_transparency);"
-            + "  }"
-            + "}";
-
-    private static final FloatBuffer TEXTURE_COORDINATES = makeRectangularTextureBuffer(
-            0.0f, 1.0f, 0.0f, 1.0f);
-
-    private static final int POSITION_DATA_SIZE = 3;
-    private static final int TEXTURE_COORDINATE_DATA_SIZE = 2;
-
-    // Fix the desktop height and adjust width accordingly.
-    private static final float HALF_HEIGHT = 1.0f;
-
-    // Number of vertices passed to glDrawArrays().
-    private static final int VERTICES_NUMBER = 6;
-
-    private final Display mDisplay;
-
-    private int mVertexShaderHandle;
-    private int mFragmentShaderHandle;
-    private int mProgramHandle;
-    private int mCombinedMatrixHandle;
-    private int mTextureUniformHandle;
-    private int mPositionHandle;
-    private int mTransparentHandle;
-    private int mTextureDataHandle;
-    private int mTextureCoordinateHandle;
-    private FloatBuffer mPosition;
-    private float mHalfWidth;
-
-    // Lock to allow multithreaded access to mHalfWidth.
-    private final Object mHalfWidthLock = new Object();
-
-    private Bitmap mVideoFrame;
-
-    // Lock to allow multithreaded access to mVideoFrame.
-    private final Object mVideoFrameLock = new Object();
-
-    // Flag to indicate whether to reload the desktop texture.
-    private boolean mReloadTexture;
-
-    // Lock to allow multithreaded access to mReloadTexture.
-    private final Object mReloadTextureLock = new Object();
-
-    public Desktop(Display display) {
-        mDisplay = display;
-        mVertexShaderHandle =
-                ShaderHelper.compileShader(GLES20.GL_VERTEX_SHADER, VERTEX_SHADER);
-        mFragmentShaderHandle =
-                ShaderHelper.compileShader(GLES20.GL_FRAGMENT_SHADER, FRAGMENT_SHADER);
-        mProgramHandle = ShaderHelper.createAndLinkProgram(mVertexShaderHandle,
-                mFragmentShaderHandle, new String[] {"a_Position", "a_TexCoordinate",
-                    "u_CombinedMatrix", "u_Texture"});
-        mCombinedMatrixHandle =
-                GLES20.glGetUniformLocation(mProgramHandle, "u_CombinedMatrix");
-        mTextureUniformHandle = GLES20.glGetUniformLocation(mProgramHandle, "u_Texture");
-        mPositionHandle = GLES20.glGetAttribLocation(mProgramHandle, "a_Position");
-        mTransparentHandle = GLES20.glGetAttribLocation(mProgramHandle, "a_transparency");
-        mTextureCoordinateHandle = GLES20.glGetAttribLocation(mProgramHandle, "a_TexCoordinate");
-        mTextureDataHandle = TextureHelper.createTextureHandle();
-    }
-
-    /**
-     * Draw the desktop. Make sure {@link hasVideoFrame} returns true.
-     */
-    public void draw(float[] combinedMatrix, boolean isTransparent) {
-        GLES20.glUseProgram(mProgramHandle);
-
-        // Pass in model view project matrix.
-        GLES20.glUniformMatrix4fv(mCombinedMatrixHandle, 1, false, combinedMatrix, 0);
-
-        // Pass in texture coordinate.
-        GLES20.glVertexAttribPointer(mTextureCoordinateHandle, TEXTURE_COORDINATE_DATA_SIZE,
-                GLES20.GL_FLOAT, false, 0, TEXTURE_COORDINATES);
-        GLES20.glEnableVertexAttribArray(mTextureCoordinateHandle);
-
-        GLES20.glVertexAttribPointer(mPositionHandle, POSITION_DATA_SIZE, GLES20.GL_FLOAT, false,
-                0, mPosition);
-        GLES20.glEnableVertexAttribArray(mPositionHandle);
-
-        // Enable transparency.
-        GLES20.glEnable(GLES20.GL_BLEND);
-        GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
-
-        // Pass in transparency.
-        GLES20.glVertexAttrib1f(mTransparentHandle, isTransparent ? 0.5f : 1.0f);
-
-        // Link texture data with texture unit.
-        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
-        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureDataHandle);
-        GLES20.glUniform1i(mTextureUniformHandle, 0);
-
-        GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, VERTICES_NUMBER);
-
-        GLES20.glDisable(GLES20.GL_BLEND);
-        GLES20.glDisableVertexAttribArray(mPositionHandle);
-        GLES20.glDisableVertexAttribArray(mTextureCoordinateHandle);
-    }
-
-    /**
-     *  Update the desktop frame data based on the mVideoFrame. Note here we fix the
-     *  height of the desktop and vary width accordingly.
-     */
-    private void updateVideoFrame(Bitmap videoFrame) {
-        float newHalfDesktopWidth;
-        synchronized (mVideoFrameLock) {
-            mVideoFrame = videoFrame;
-            TextureHelper.linkTexture(mTextureDataHandle, videoFrame);
-            newHalfDesktopWidth = videoFrame.getWidth() * HALF_HEIGHT / videoFrame.getHeight();
-        }
-
-        synchronized (mHalfWidthLock) {
-            if (Math.abs(mHalfWidth - newHalfDesktopWidth) > 0.0001) {
-                mHalfWidth = newHalfDesktopWidth;
-                mPosition = makeFloatBuffer(new float[] {
-                        // Desktop model coordinates.
-                        -mHalfWidth, HALF_HEIGHT, 0.0f,
-                        -mHalfWidth, -HALF_HEIGHT, 0.0f,
-                        mHalfWidth, HALF_HEIGHT, 0.0f,
-                        -mHalfWidth, -HALF_HEIGHT, 0.0f,
-                        mHalfWidth, -HALF_HEIGHT, 0.0f,
-                        mHalfWidth, HALF_HEIGHT, 0.0f
-                });
-            }
-        }
-    }
-
-    /**
-     * Clean up opengl data.
-     */
-    public void cleanup() {
-        GLES20.glDeleteShader(mVertexShaderHandle);
-        GLES20.glDeleteShader(mFragmentShaderHandle);
-        GLES20.glDeleteTextures(1, new int[] {mTextureDataHandle}, 0);
-    }
-
-    /**
-     * Return true if video frame data are already loaded in.
-     */
-    public boolean hasVideoFrame() {
-        synchronized (mVideoFrameLock) {
-            return mVideoFrame != null;
-        }
-    }
-
-    public float getHalfHeight() {
-        return HALF_HEIGHT;
-    }
-
-    public float getHalfWidth() {
-        synchronized (mHalfWidthLock) {
-            return mHalfWidth;
-        }
-    }
-
-    /**
-     * Get desktop height and width in pixels.
-     */
-    public Point getFrameSizePixels() {
-        synchronized (mVideoFrameLock) {
-            return new Point(mVideoFrame == null ? 0 : mVideoFrame.getWidth(),
-                    mVideoFrame == null ? 0 : mVideoFrame.getHeight());
-        }
-    }
-
-    /**
-     * Link desktop texture if {@link reloadTexture} was previously called.
-     * Invoked from {@link com.google.vrtoolkit.cardboard.CardboardView.StereoRenderer.onNewFrame}
-     * so that both eyes will have the same texture.
-     */
-    public void maybeLoadDesktopTexture() {
-        synchronized (mReloadTextureLock) {
-            if (!mReloadTexture) {
-                return;
-            }
-        }
-
-        // TODO(shichengfeng): Record the time desktop drawing takes.
-        Bitmap bitmap = mDisplay.getVideoFrame();
-
-        if (bitmap == null) {
-            // This can happen if the client is connected, but a complete video frame has not yet
-            // been decoded.
-            return;
-        }
-
-        updateVideoFrame(bitmap);
-
-        synchronized (mReloadTextureLock) {
-            mReloadTexture = false;
-        }
-    }
-
-    /**
-     * Inform this object that a new video frame should be rendered.
-     * Called from native display thread.
-     */
-    public void reloadTexture() {
-        synchronized (mReloadTextureLock) {
-            mReloadTexture = true;
-        }
-    }
-}