1 files changed, 117 insertions, 0 deletions
diff --git a/src/libui_sdl/libui/windows/drawmatrix.cpp b/src/libui_sdl/libui/windows/drawmatrix.cpp
new file mode 100644
index 0000000..090972a
--- /dev/null
+++ b/src/libui_sdl/libui/windows/drawmatrix.cpp
@@ -0,0 +1,117 @@
+// 7 september 2015
+#include "uipriv_windows.hpp"
+#include "draw.hpp"
+
+void m2d(uiDrawMatrix *m, D2D1_MATRIX_3X2_F *d)
+{
+	d->_11 = m->M11;
+	d->_12 = m->M12;
+	d->_21 = m->M21;
+	d->_22 = m->M22;
+	d->_31 = m->M31;
+	d->_32 = m->M32;
+}
+
+static void d2m(D2D1_MATRIX_3X2_F *d, uiDrawMatrix *m)
+{
+	m->M11 = d->_11;
+	m->M12 = d->_12;
+	m->M21 = d->_21;
+	m->M22 = d->_22;
+	m->M31 = d->_31;
+	m->M32 = d->_32;
+}
+
+void uiDrawMatrixTranslate(uiDrawMatrix *m, double x, double y)
+{
+	D2D1_MATRIX_3X2_F dm;
+
+	m2d(m, &dm);
+	dm = dm * D2D1::Matrix3x2F::Translation(x, y);
+	d2m(&dm, m);
+}
+
+void uiDrawMatrixScale(uiDrawMatrix *m, double xCenter, double yCenter, double x, double y)
+{
+	D2D1_MATRIX_3X2_F dm;
+	D2D1_POINT_2F center;
+
+	m2d(m, &dm);
+	center.x = xCenter;
+	center.y = yCenter;
+	dm = dm * D2D1::Matrix3x2F::Scale(x, y, center);
+	d2m(&dm, m);
+}
+
+#define r2d(x) (x * (180.0 / uiPi))
+
+void uiDrawMatrixRotate(uiDrawMatrix *m, double x, double y, double amount)
+{
+	D2D1_MATRIX_3X2_F dm;
+	D2D1_POINT_2F center;
+
+	m2d(m, &dm);
+	center.x = x;
+	center.y = y;
+	dm = dm * D2D1::Matrix3x2F::Rotation(r2d(amount), center);
+	d2m(&dm, m);
+}
+
+void uiDrawMatrixSkew(uiDrawMatrix *m, double x, double y, double xamount, double yamount)
+{
+	D2D1_MATRIX_3X2_F dm;
+	D2D1_POINT_2F center;
+
+	m2d(m, &dm);
+	center.x = x;
+	center.y = y;
+	dm = dm * D2D1::Matrix3x2F::Skew(r2d(xamount), r2d(yamount), center);
+	d2m(&dm, m);
+}
+
+void uiDrawMatrixMultiply(uiDrawMatrix *dest, uiDrawMatrix *src)
+{
+	D2D1_MATRIX_3X2_F c, d;
+
+	m2d(dest, &c);
+	m2d(src, &d);
+	c = c * d;
+	d2m(&c, dest);
+}
+
+int uiDrawMatrixInvertible(uiDrawMatrix *m)
+{
+	D2D1_MATRIX_3X2_F d;
+
+	m2d(m, &d);
+	return D2D1IsMatrixInvertible(&d) != FALSE;
+}
+
+int uiDrawMatrixInvert(uiDrawMatrix *m)
+{
+	D2D1_MATRIX_3X2_F d;
+
+	m2d(m, &d);
+	if (D2D1InvertMatrix(&d) == FALSE)
+		return 0;
+	d2m(&d, m);
+	return 1;
+}
+
+void uiDrawMatrixTransformPoint(uiDrawMatrix *m, double *x, double *y)
+{
+	D2D1::Matrix3x2F dm;
+	D2D1_POINT_2F pt;
+
+	m2d(m, &dm);
+	pt.x = *x;
+	pt.y = *y;
+	pt = dm.TransformPoint(pt);
+	*x = pt.x;
+	*y = pt.y;
+}
+
+void uiDrawMatrixTransformSize(uiDrawMatrix *m, double *x, double *y)
+{
+	fallbackTransformSize(m, x, y);
+}