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diff --git a/src/guilib/TransformMatrix.h b/src/guilib/TransformMatrix.h
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+#pragma once
+
+/*
+ * Copyright (C) 2005-2013 Team XBMC
+ * http://xbmc.org
+ *
+ * This Program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This Program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with XBMC; see the file COPYING. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <math.h>
+#include <memory>
+#include <string.h>
+#include <stdint.h>
+
+#ifdef __GNUC__
+// under gcc, inline will only take place if optimizations are applied (-O). this will force inline even whith optimizations.
+#define XBMC_FORCE_INLINE __attribute__((always_inline))
+#else
+#define XBMC_FORCE_INLINE
+#endif
+
+typedef uint32_t color_t;
+
+class TransformMatrix
+{
+public:
+ TransformMatrix()
+ {
+ Reset();
+ };
+ void Reset()
+ {
+ m[0][0] = 1.0f; m[0][1] = m[0][2] = m[0][3] = 0.0f;
+ m[1][0] = m[1][2] = m[1][3] = 0.0f; m[1][1] = 1.0f;
+ m[2][0] = m[2][1] = m[2][3] = 0.0f; m[2][2] = 1.0f;
+ alpha = 1.0f;
+ identity = true;
+ };
+ static TransformMatrix CreateTranslation(float transX, float transY, float transZ = 0)
+ {
+ TransformMatrix translation;
+ translation.SetTranslation(transX, transY, transZ);
+ return translation;
+ }
+ void SetTranslation(float transX, float transY, float transZ)
+ {
+ m[0][1] = m[0][2] = 0.0f; m[0][0] = 1.0f; m[0][3] = transX;
+ m[1][0] = m[1][2] = 0.0f; m[1][1] = 1.0f; m[1][3] = transY;
+ m[2][0] = m[2][1] = 0.0f; m[2][2] = 1.0f; m[2][3] = transZ;
+ alpha = 1.0f;
+ identity = (transX == 0 && transY == 0 && transZ == 0);
+ }
+ static TransformMatrix CreateScaler(float scaleX, float scaleY, float scaleZ = 1.0f)
+ {
+ TransformMatrix scaler;
+ scaler.m[0][0] = scaleX;
+ scaler.m[1][1] = scaleY;
+ scaler.m[2][2] = scaleZ;
+ scaler.identity = (scaleX == 1 && scaleY == 1 && scaleZ == 1);
+ return scaler;
+ };
+ void SetScaler(float scaleX, float scaleY, float centerX, float centerY)
+ {
+ // Trans(centerX,centerY,centerZ)*Scale(scaleX,scaleY,scaleZ)*Trans(-centerX,-centerY,-centerZ)
+ float centerZ = 0.0f, scaleZ = 1.0f;
+ m[0][0] = scaleX; m[0][1] = 0.0f; m[0][2] = 0.0f; m[0][3] = centerX*(1-scaleX);
+ m[1][0] = 0.0f; m[1][1] = scaleY; m[1][2] = 0.0f; m[1][3] = centerY*(1-scaleY);
+ m[2][0] = 0.0f; m[2][1] = 0.0f; m[2][2] = scaleZ; m[2][3] = centerZ*(1-scaleZ);
+ alpha = 1.0f;
+ identity = (scaleX == 1 && scaleY == 1);
+ };
+ void SetXRotation(float angle, float y, float z, float ar = 1.0f)
+ { // angle about the X axis, centered at y,z where our coordinate system has aspect ratio ar.
+ // Trans(0,y,z)*Scale(1,1/ar,1)*RotateX(angle)*Scale(ar,1,1)*Trans(0,-y,-z);
+ float c = cos(angle); float s = sin(angle);
+ m[0][0] = ar; m[0][1] = 0.0f; m[0][2] = 0.0f; m[0][3] = 0.0f;
+ m[1][0] = 0.0f; m[1][1] = c/ar; m[1][2] = -s/ar; m[1][3] = (-y*c+s*z)/ar + y;
+ m[2][0] = 0.0f; m[2][1] = s; m[2][2] = c; m[2][3] = (-y*s-c*z) + z;
+ alpha = 1.0f;
+ identity = (angle == 0);
+ }
+ void SetYRotation(float angle, float x, float z, float ar = 1.0f)
+ { // angle about the Y axis, centered at x,z where our coordinate system has aspect ratio ar.
+ // Trans(x,0,z)*Scale(1/ar,1,1)*RotateY(angle)*Scale(ar,1,1)*Trans(-x,0,-z);
+ float c = cos(angle); float s = sin(angle);
+ m[0][0] = c; m[0][1] = 0.0f; m[0][2] = -s/ar; m[0][3] = -x*c + s*z/ar + x;
+ m[1][0] = 0.0f; m[1][1] = 1.0f; m[1][2] = 0.0f; m[1][3] = 0.0f;
+ m[2][0] = ar*s; m[2][1] = 0.0f; m[2][2] = c; m[2][3] = -ar*x*s - c*z + z;
+ alpha = 1.0f;
+ identity = (angle == 0);
+ }
+ static TransformMatrix CreateZRotation(float angle, float x, float y, float ar = 1.0f)
+ { // angle about the Z axis, centered at x,y where our coordinate system has aspect ratio ar.
+ // Trans(x,y,0)*Scale(1/ar,1,1)*RotateZ(angle)*Scale(ar,1,1)*Trans(-x,-y,0)
+ TransformMatrix rot;
+ rot.SetZRotation(angle, x, y, ar);
+ return rot;
+ }
+ void SetZRotation(float angle, float x, float y, float ar = 1.0f)
+ { // angle about the Z axis, centered at x,y where our coordinate system has aspect ratio ar.
+ // Trans(x,y,0)*Scale(1/ar,1,1)*RotateZ(angle)*Scale(ar,1,1)*Trans(-x,-y,0)
+ float c = cos(angle); float s = sin(angle);
+ m[0][0] = c; m[0][1] = -s/ar; m[0][2] = 0.0f; m[0][3] = -x*c + s*y/ar + x;
+ m[1][0] = s*ar; m[1][1] = c; m[1][2] = 0.0f; m[1][3] = -ar*x*s - c*y + y;
+ m[2][0] = 0.0f; m[2][1] = 0.0f; m[2][2] = 1.0f; m[2][3] = 0.0f;
+ alpha = 1.0f;
+ identity = (angle == 0);
+ }
+ static TransformMatrix CreateFader(float a)
+ {
+ TransformMatrix fader;
+ fader.SetFader(a);
+ return fader;
+ }
+ void SetFader(float a)
+ {
+ m[0][0] = 1.0f; m[0][1] = 0.0f; m[0][2] = 0.0f; m[0][3] = 0.0f;
+ m[1][0] = 0.0f; m[1][1] = 1.0f; m[1][2] = 0.0f; m[1][3] = 0.0f;
+ m[2][0] = 0.0f; m[2][1] = 0.0f; m[2][2] = 1.0f; m[2][3] = 0.0f;
+ alpha = a;
+ identity = (a == 1.0f);
+ }
+
+ // multiplication operators
+ const TransformMatrix &operator *=(const TransformMatrix &right)
+ {
+ if (right.identity)
+ return *this;
+ if (identity)
+ {
+ *this = right;
+ return *this;
+ }
+ float t00 = m[0][0] * right.m[0][0] + m[0][1] * right.m[1][0] + m[0][2] * right.m[2][0];
+ float t01 = m[0][0] * right.m[0][1] + m[0][1] * right.m[1][1] + m[0][2] * right.m[2][1];
+ float t02 = m[0][0] * right.m[0][2] + m[0][1] * right.m[1][2] + m[0][2] * right.m[2][2];
+ m[0][3] = m[0][0] * right.m[0][3] + m[0][1] * right.m[1][3] + m[0][2] * right.m[2][3] + m[0][3];
+ m[0][0] = t00; m[0][1] = t01; m[0][2] = t02;
+ t00 = m[1][0] * right.m[0][0] + m[1][1] * right.m[1][0] + m[1][2] * right.m[2][0];
+ t01 = m[1][0] * right.m[0][1] + m[1][1] * right.m[1][1] + m[1][2] * right.m[2][1];
+ t02 = m[1][0] * right.m[0][2] + m[1][1] * right.m[1][2] + m[1][2] * right.m[2][2];
+ m[1][3] = m[1][0] * right.m[0][3] + m[1][1] * right.m[1][3] + m[1][2] * right.m[2][3] + m[1][3];
+ m[1][0] = t00; m[1][1] = t01; m[1][2] = t02;
+ t00 = m[2][0] * right.m[0][0] + m[2][1] * right.m[1][0] + m[2][2] * right.m[2][0];
+ t01 = m[2][0] * right.m[0][1] + m[2][1] * right.m[1][1] + m[2][2] * right.m[2][1];
+ t02 = m[2][0] * right.m[0][2] + m[2][1] * right.m[1][2] + m[2][2] * right.m[2][2];
+ m[2][3] = m[2][0] * right.m[0][3] + m[2][1] * right.m[1][3] + m[2][2] * right.m[2][3] + m[2][3];
+ m[2][0] = t00; m[2][1] = t01; m[2][2] = t02;
+ alpha *= right.alpha;
+ identity = false;
+ return *this;
+ }
+
+ TransformMatrix operator *(const TransformMatrix &right) const
+ {
+ if (right.identity)
+ return *this;
+ if (identity)
+ return right;
+ TransformMatrix result;
+ result.m[0][0] = m[0][0] * right.m[0][0] + m[0][1] * right.m[1][0] + m[0][2] * right.m[2][0];
+ result.m[0][1] = m[0][0] * right.m[0][1] + m[0][1] * right.m[1][1] + m[0][2] * right.m[2][1];
+ result.m[0][2] = m[0][0] * right.m[0][2] + m[0][1] * right.m[1][2] + m[0][2] * right.m[2][2];
+ result.m[0][3] = m[0][0] * right.m[0][3] + m[0][1] * right.m[1][3] + m[0][2] * right.m[2][3] + m[0][3];
+ result.m[1][0] = m[1][0] * right.m[0][0] + m[1][1] * right.m[1][0] + m[1][2] * right.m[2][0];
+ result.m[1][1] = m[1][0] * right.m[0][1] + m[1][1] * right.m[1][1] + m[1][2] * right.m[2][1];
+ result.m[1][2] = m[1][0] * right.m[0][2] + m[1][1] * right.m[1][2] + m[1][2] * right.m[2][2];
+ result.m[1][3] = m[1][0] * right.m[0][3] + m[1][1] * right.m[1][3] + m[1][2] * right.m[2][3] + m[1][3];
+ result.m[2][0] = m[2][0] * right.m[0][0] + m[2][1] * right.m[1][0] + m[2][2] * right.m[2][0];
+ result.m[2][1] = m[2][0] * right.m[0][1] + m[2][1] * right.m[1][1] + m[2][2] * right.m[2][1];
+ result.m[2][2] = m[2][0] * right.m[0][2] + m[2][1] * right.m[1][2] + m[2][2] * right.m[2][2];
+ result.m[2][3] = m[2][0] * right.m[0][3] + m[2][1] * right.m[1][3] + m[2][2] * right.m[2][3] + m[2][3];
+ result.alpha = alpha * right.alpha;
+ result.identity = false;
+ return result;
+ }
+
+ inline void TransformPosition(float &x, float &y, float &z) const XBMC_FORCE_INLINE
+ {
+ float newX = m[0][0] * x + m[0][1] * y + m[0][2] * z + m[0][3];
+ float newY = m[1][0] * x + m[1][1] * y + m[1][2] * z + m[1][3];
+ z = m[2][0] * x + m[2][1] * y + m[2][2] * z + m[2][3];
+ y = newY;
+ x = newX;
+ }
+
+ inline void TransformPositionUnscaled(float &x, float &y, float &z) const XBMC_FORCE_INLINE
+ {
+ float n;
+ // calculate the norm of the transformed (but not translated) vectors involved
+ n = sqrt(m[0][0]*m[0][0] + m[0][1]*m[0][1] + m[0][2]*m[0][2]);
+ float newX = (m[0][0] * x + m[0][1] * y + m[0][2] * z)/n + m[0][3];
+ n = sqrt(m[1][0]*m[1][0] + m[1][1]*m[1][1] + m[1][2]*m[1][2]);
+ float newY = (m[1][0] * x + m[1][1] * y + m[1][2] * z)/n + m[1][3];
+ n = sqrt(m[2][0]*m[2][0] + m[2][1]*m[2][1] + m[2][2]*m[2][2]);
+ float newZ = (m[2][0] * x + m[2][1] * y + m[2][2] * z)/n + m[2][3];
+ z = newZ;
+ y = newY;
+ x = newX;
+ }
+
+ inline void InverseTransformPosition(float &x, float &y) const XBMC_FORCE_INLINE
+ { // used for mouse - no way to find z
+ x -= m[0][3]; y -= m[1][3];
+ float detM = m[0][0]*m[1][1] - m[0][1]*m[1][0];
+ float newX = (m[1][1] * x - m[0][1] * y)/detM;
+ y = (-m[1][0] * x + m[0][0] * y)/detM;
+ x = newX;
+ }
+
+ inline float TransformXCoord(float x, float y, float z) const XBMC_FORCE_INLINE
+ {
+ return m[0][0] * x + m[0][1] * y + m[0][2] * z + m[0][3];
+ }
+
+ inline float TransformYCoord(float x, float y, float z) const XBMC_FORCE_INLINE
+ {
+ return m[1][0] * x + m[1][1] * y + m[1][2] * z + m[1][3];
+ }
+
+ inline float TransformZCoord(float x, float y, float z) const XBMC_FORCE_INLINE
+ {
+ return m[2][0] * x + m[2][1] * y + m[2][2] * z + m[2][3];
+ }
+
+ inline color_t TransformAlpha(color_t colour) const XBMC_FORCE_INLINE
+ {
+ return (color_t)(colour * alpha);
+ }
+
+ float m[3][4];
+ float alpha;
+ bool identity;
+};
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