--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/platform/graphics/cairo/AffineTransformCairo.cpp Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,281 @@
+/*
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "AffineTransform.h"
+
+#include "IntRect.h"
+#include "FloatRect.h"
+
+#include "cairo.h"
+
+namespace WebCore {
+
+static const double deg2rad = 0.017453292519943295769; // pi/180
+
+AffineTransform::AffineTransform()
+{
+ cairo_matrix_init_identity(&m_transform);
+}
+
+AffineTransform::AffineTransform(double a, double b, double c, double d, double tx, double ty)
+{
+ cairo_matrix_init(&m_transform, a, c, b, d, tx, ty);
+}
+
+AffineTransform::AffineTransform(const cairo_matrix_t &matrix)
+{
+ m_transform = matrix;
+}
+
+void AffineTransform::setMatrix(double a, double b, double c, double d, double tx, double ty)
+{
+ cairo_matrix_init(&m_transform, a, c, b, d, tx, ty);
+}
+
+void AffineTransform::map(double x, double y, double* x2, double* y2) const
+{
+ *x2 = x;
+ *y2 = y;
+ cairo_matrix_transform_point(&m_transform, x2, y2);
+}
+
+IntRect AffineTransform::mapRect(const IntRect &rect) const
+{
+ FloatRect floatRect(rect);
+ FloatRect enclosingFloatRect = this->mapRect(floatRect);
+
+ return enclosingIntRect(enclosingFloatRect);
+}
+
+FloatRect AffineTransform::mapRect(const FloatRect &rect) const
+{
+ double rectMinX = rect.x();
+ double rectMaxX = rect.x() + rect.width();
+ double rectMinY = rect.y();
+ double rectMaxY = rect.y() + rect.height();
+
+ double px = rectMinX;
+ double py = rectMinY;
+ cairo_matrix_transform_point(&m_transform, &px, &py);
+
+ double enclosingRectMinX = px;
+ double enclosingRectMinY = py;
+ double enclosingRectMaxX = px;
+ double enclosingRectMaxY = py;
+
+ px = rectMaxX;
+ py = rectMinY;
+ cairo_matrix_transform_point(&m_transform, &px, &py);
+ if (px < enclosingRectMinX)
+ enclosingRectMinX = px;
+ else if (px > enclosingRectMaxX)
+ enclosingRectMaxX = px;
+ if (py < enclosingRectMinY)
+ enclosingRectMinY = py;
+ else if (py > enclosingRectMaxY)
+ enclosingRectMaxY = py;
+
+ px = rectMaxX;
+ py = rectMaxY;
+ cairo_matrix_transform_point(&m_transform, &px, &py);
+ if (px < enclosingRectMinX)
+ enclosingRectMinX = px;
+ else if (px > enclosingRectMaxX)
+ enclosingRectMaxX = px;
+ if (py < enclosingRectMinY)
+ enclosingRectMinY = py;
+ else if (py > enclosingRectMaxY)
+ enclosingRectMaxY = py;
+
+ px = rectMinX;
+ py = rectMaxY;
+ cairo_matrix_transform_point(&m_transform, &px, &py);
+ if (px < enclosingRectMinX)
+ enclosingRectMinX = px;
+ else if (px > enclosingRectMaxX)
+ enclosingRectMaxX = px;
+ if (py < enclosingRectMinY)
+ enclosingRectMinY = py;
+ else if (py > enclosingRectMaxY)
+ enclosingRectMaxY = py;
+
+
+ double enclosingRectWidth = enclosingRectMaxX - enclosingRectMinX;
+ double enclosingRectHeight = enclosingRectMaxY - enclosingRectMinY;
+
+ return FloatRect(enclosingRectMinX, enclosingRectMinY, enclosingRectWidth, enclosingRectHeight);
+}
+
+bool AffineTransform::isIdentity() const
+{
+ return ((m_transform.xx == 1) && (m_transform.yy == 1)
+ && (m_transform.xy == 0) && (m_transform.yx == 0)
+ && (m_transform.x0 == 0) && (m_transform.y0 == 0));
+}
+
+double AffineTransform::a() const
+{
+ return m_transform.xx;
+}
+
+void AffineTransform::setA(double a)
+{
+ m_transform.xx = a;
+}
+
+double AffineTransform::b() const
+{
+ return m_transform.xy;
+}
+
+void AffineTransform::setB(double b)
+{
+ m_transform.xy = b;
+}
+
+double AffineTransform::c() const
+{
+ return m_transform.yx;
+}
+
+void AffineTransform::setC(double c)
+{
+ m_transform.yx = c;
+}
+
+double AffineTransform::d() const
+{
+ return m_transform.yy;
+}
+
+void AffineTransform::setD(double d)
+{
+ m_transform.yy = d;
+}
+
+double AffineTransform::e() const
+{
+ return m_transform.x0;
+}
+
+void AffineTransform::setE(double e)
+{
+ m_transform.x0 = e;
+}
+
+double AffineTransform::f() const
+{
+ return m_transform.y0;
+}
+
+void AffineTransform::setF(double f)
+{
+ m_transform.y0 = f;
+}
+
+void AffineTransform::reset()
+{
+ cairo_matrix_init_identity(&m_transform);
+}
+
+AffineTransform &AffineTransform::scale(double sx, double sy)
+{
+ cairo_matrix_scale(&m_transform, sx, sy);
+ return *this;
+}
+
+AffineTransform &AffineTransform::rotate(double d)
+{
+ cairo_matrix_rotate(&m_transform, d * deg2rad);
+ return *this;
+}
+
+AffineTransform &AffineTransform::translate(double tx, double ty)
+{
+ cairo_matrix_translate(&m_transform, tx, ty);
+ return *this;
+}
+
+AffineTransform &AffineTransform::shear(double sx, double sy)
+{
+ cairo_matrix_t shear;
+ cairo_matrix_init(&shear, 1, sy, sx, 1, 0, 0);
+
+ cairo_matrix_t result;
+ cairo_matrix_multiply(&result, &shear, &m_transform);
+ m_transform = result;
+
+ return *this;
+}
+
+double AffineTransform::det() const
+{
+ return m_transform.xx * m_transform.yy - m_transform.xy * m_transform.yx;
+}
+
+AffineTransform AffineTransform::inverse() const
+{
+ if (!isInvertible()) return AffineTransform();
+
+ cairo_matrix_t result = m_transform;
+ cairo_matrix_invert(&result);
+ return AffineTransform(result);
+}
+
+AffineTransform::operator cairo_matrix_t() const
+{
+ return m_transform;
+}
+
+bool AffineTransform::operator== (const AffineTransform &m2) const
+{
+ return ((m_transform.xx == m2.m_transform.xx)
+ && (m_transform.yy == m2.m_transform.yy)
+ && (m_transform.xy == m2.m_transform.xy)
+ && (m_transform.yx == m2.m_transform.yx)
+ && (m_transform.x0 == m2.m_transform.x0)
+ && (m_transform.y0 == m2.m_transform.y0));
+
+}
+
+AffineTransform &AffineTransform::operator*= (const AffineTransform &m2)
+{
+ cairo_matrix_t result;
+ cairo_matrix_multiply(&result, &m_transform, &m2.m_transform);
+ m_transform = result;
+
+ return *this;
+}
+
+AffineTransform AffineTransform::operator* (const AffineTransform &m2)
+{
+ cairo_matrix_t result;
+ cairo_matrix_multiply(&result, &m_transform, &m2.m_transform);
+ return result;
+}
+
+}
+
+// vim: ts=4 sw=4 et