public override void onDrawFrame(GL10 gl)
{
mFrameLock.@lock();
if (mCurrentFrame != null && !mVideoDisabled)
{
GLES20.glUseProgram(mProgram);
if (mTextureWidth != mCurrentFrame.Width || mTextureHeight != mCurrentFrame.Height)
{
setupTextures(mCurrentFrame);
}
updateTextures(mCurrentFrame);
Matrix.setIdentityM(mScaleMatrix, 0);
float scaleX = 1.0f, scaleY = 1.0f;
float ratio = (float)mCurrentFrame.Width / mCurrentFrame.Height;
float vratio = (float)mViewportWidth / mViewportHeight;
if (mVideoFitEnabled)
{
if (ratio > vratio)
{
scaleY = vratio / ratio;
}
else
{
scaleX = ratio / vratio;
}
}
else
{
if (ratio < vratio)
{
scaleY = vratio / ratio;
}
else
{
scaleX = ratio / vratio;
}
}
Matrix.scaleM(mScaleMatrix, 0, scaleX * (mCurrentFrame.MirroredX ? -1.0f : 1.0f), scaleY, 1);
int mMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");
GLES20.glUniformMatrix4fv(mMVPMatrixHandle, 1, false, mScaleMatrix, 0);
GLES20.glDrawElements(GLES20.GL_TRIANGLES, mVertexIndex.Length, GLES20.GL_UNSIGNED_SHORT, mDrawListBuffer);
}
else
{
//black frame when video is disabled
gl.glClearColor(0, 0, 0, 1);
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
}
mFrameLock.unlock();
}
public override void onSurfaceCreated(GL10 gl, EGLConfig config)
{
gl.glClearColor(0, 0, 0, 1);
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexShaderCode);
int fragmentShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentShaderCode);
mProgram = GLES20.glCreateProgram(); // create empty OpenGL ES
// Program
GLES20.glAttachShader(mProgram, vertexShader); // add the vertex
// shader to program
GLES20.glAttachShader(mProgram, fragmentShader); // add the fragment
// shader to
// program
GLES20.glLinkProgram(mProgram);
int positionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition");
int textureHandle = GLES20.glGetAttribLocation(mProgram, "aTextureCoord");
GLES20.glVertexAttribPointer(positionHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false, COORDS_PER_VERTEX * 4, mVertexBuffer);
GLES20.glEnableVertexAttribArray(positionHandle);
GLES20.glVertexAttribPointer(textureHandle, TEXTURECOORDS_PER_VERTEX, GLES20.GL_FLOAT, false, TEXTURECOORDS_PER_VERTEX * 4, mTextureBuffer);
GLES20.glEnableVertexAttribArray(textureHandle);
GLES20.glUseProgram(mProgram);
int i = GLES20.glGetUniformLocation(mProgram, "Ytex");
GLES20.glUniform1i(i, 0); // Bind Ytex to texture unit 0
i = GLES20.glGetUniformLocation(mProgram, "Utex");
GLES20.glUniform1i(i, 1); // Bind Utex to texture unit 1
i = GLES20.glGetUniformLocation(mProgram, "Vtex");
GLES20.glUniform1i(i, 2); // Bind Vtex to texture unit 2
mTextureWidth = 0;
mTextureHeight = 0;
}