Moving the GL implementation details into a sub folder for client display.

remoting/client/gl_math.h

-// Copyright 2016 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.
-
-#ifndef REMOTING_CLIENT_OPENGL_GL_MATH_H_
-#define REMOTING_CLIENT_OPENGL_GL_MATH_H_
-
-#include <array>
-#include <string>
-
-#include "base/macros.h"
-
-namespace remoting {
-
-// Transposes matrix [ m0, m1, m2, m3, m4, m5, m6, m7, m8 ]:
-//
-// | m0, m1, m2, |   | x |
-// | m3, m4, m5, | * | y |
-// | m6, m7, m8  |   | 1 |
-//
-// Into [ m0, m3, m6, m1, m4, m7, m2, m5, m8 ].
-void TransposeTransformationMatrix(std::array<float, 9>* matrix);
-
-// Given left, top, width, height of a rectangle, fills |positions| with
-// coordinates of four vertices of the rectangle.
-// positions: [ x_upperleft, y_upperleft, x_lowerleft, y_lowerleft,
-//              x_upperright, y_upperright, x_lowerright, y_lowerright ]
-void FillRectangleVertexPositions(float left,
-                                  float top,
-                                  float width,
-                                  float height,
-                                  std::array<float, 8>* positions);
-
-// Returns the string representation of the matrix for debugging.
-//
-// For example:
-// [
-// 1, 0, 0,
-// 0, 1, 0,
-// 0, 0, 1,
-// ]
-std::string MatrixToString(const float* mat, int num_rows, int num_cols);
-
-}  // namespace remoting
-
-#endif  // REMOTING_CLIENT_OPENGL_GL_MATH_H_