author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 27 Aug 2009 07:44:59 +0300 | |
changeset 16 | a359256acfc6 |
parent 0 | dd21522fd290 |
child 36 | 0ed94ceaa377 |
permissions | -rw-r--r-- |
0
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/* |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include "AffineTransform.h" |
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#include "IntRect.h" |
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#include "FloatRect.h" |
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#include "cairo.h" |
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namespace WebCore { |
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static const double deg2rad = 0.017453292519943295769; // pi/180 |
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AffineTransform::AffineTransform() |
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{ |
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cairo_matrix_init_identity(&m_transform); |
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} |
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AffineTransform::AffineTransform(double a, double b, double c, double d, double tx, double ty) |
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{ |
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cairo_matrix_init(&m_transform, a, c, b, d, tx, ty); |
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} |
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AffineTransform::AffineTransform(const cairo_matrix_t &matrix) |
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{ |
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m_transform = matrix; |
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} |
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void AffineTransform::setMatrix(double a, double b, double c, double d, double tx, double ty) |
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{ |
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cairo_matrix_init(&m_transform, a, c, b, d, tx, ty); |
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} |
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void AffineTransform::map(double x, double y, double* x2, double* y2) const |
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{ |
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*x2 = x; |
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*y2 = y; |
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cairo_matrix_transform_point(&m_transform, x2, y2); |
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} |
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IntRect AffineTransform::mapRect(const IntRect &rect) const |
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{ |
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FloatRect floatRect(rect); |
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FloatRect enclosingFloatRect = this->mapRect(floatRect); |
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return enclosingIntRect(enclosingFloatRect); |
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} |
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FloatRect AffineTransform::mapRect(const FloatRect &rect) const |
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{ |
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double rectMinX = rect.x(); |
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double rectMaxX = rect.x() + rect.width(); |
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double rectMinY = rect.y(); |
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double rectMaxY = rect.y() + rect.height(); |
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double px = rectMinX; |
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double py = rectMinY; |
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cairo_matrix_transform_point(&m_transform, &px, &py); |
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double enclosingRectMinX = px; |
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double enclosingRectMinY = py; |
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double enclosingRectMaxX = px; |
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double enclosingRectMaxY = py; |
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px = rectMaxX; |
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py = rectMinY; |
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cairo_matrix_transform_point(&m_transform, &px, &py); |
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if (px < enclosingRectMinX) |
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enclosingRectMinX = px; |
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else if (px > enclosingRectMaxX) |
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enclosingRectMaxX = px; |
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if (py < enclosingRectMinY) |
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enclosingRectMinY = py; |
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else if (py > enclosingRectMaxY) |
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enclosingRectMaxY = py; |
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px = rectMaxX; |
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py = rectMaxY; |
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cairo_matrix_transform_point(&m_transform, &px, &py); |
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if (px < enclosingRectMinX) |
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enclosingRectMinX = px; |
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else if (px > enclosingRectMaxX) |
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enclosingRectMaxX = px; |
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if (py < enclosingRectMinY) |
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enclosingRectMinY = py; |
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else if (py > enclosingRectMaxY) |
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enclosingRectMaxY = py; |
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|
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px = rectMinX; |
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py = rectMaxY; |
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cairo_matrix_transform_point(&m_transform, &px, &py); |
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if (px < enclosingRectMinX) |
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enclosingRectMinX = px; |
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else if (px > enclosingRectMaxX) |
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enclosingRectMaxX = px; |
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if (py < enclosingRectMinY) |
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enclosingRectMinY = py; |
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else if (py > enclosingRectMaxY) |
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enclosingRectMaxY = py; |
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|
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double enclosingRectWidth = enclosingRectMaxX - enclosingRectMinX; |
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double enclosingRectHeight = enclosingRectMaxY - enclosingRectMinY; |
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|
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return FloatRect(enclosingRectMinX, enclosingRectMinY, enclosingRectWidth, enclosingRectHeight); |
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} |
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|
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bool AffineTransform::isIdentity() const |
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{ |
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return ((m_transform.xx == 1) && (m_transform.yy == 1) |
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&& (m_transform.xy == 0) && (m_transform.yx == 0) |
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&& (m_transform.x0 == 0) && (m_transform.y0 == 0)); |
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} |
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|
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double AffineTransform::a() const |
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{ |
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return m_transform.xx; |
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} |
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142 |
|
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void AffineTransform::setA(double a) |
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{ |
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m_transform.xx = a; |
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} |
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|
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double AffineTransform::b() const |
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{ |
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return m_transform.xy; |
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} |
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|
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void AffineTransform::setB(double b) |
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{ |
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m_transform.xy = b; |
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} |
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|
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double AffineTransform::c() const |
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{ |
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return m_transform.yx; |
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} |
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162 |
|
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void AffineTransform::setC(double c) |
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{ |
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m_transform.yx = c; |
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} |
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167 |
|
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168 |
double AffineTransform::d() const |
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{ |
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return m_transform.yy; |
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171 |
} |
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172 |
|
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void AffineTransform::setD(double d) |
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{ |
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m_transform.yy = d; |
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176 |
} |
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177 |
|
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178 |
double AffineTransform::e() const |
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{ |
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return m_transform.x0; |
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181 |
} |
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182 |
|
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183 |
void AffineTransform::setE(double e) |
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{ |
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m_transform.x0 = e; |
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186 |
} |
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|
187 |
|
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188 |
double AffineTransform::f() const |
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{ |
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return m_transform.y0; |
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|
191 |
} |
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|
192 |
|
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193 |
void AffineTransform::setF(double f) |
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194 |
{ |
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m_transform.y0 = f; |
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|
196 |
} |
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|
197 |
|
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void AffineTransform::reset() |
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{ |
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200 |
cairo_matrix_init_identity(&m_transform); |
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|
201 |
} |
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|
202 |
|
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203 |
AffineTransform &AffineTransform::scale(double sx, double sy) |
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{ |
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cairo_matrix_scale(&m_transform, sx, sy); |
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206 |
return *this; |
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207 |
} |
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|
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AffineTransform &AffineTransform::rotate(double d) |
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{ |
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cairo_matrix_rotate(&m_transform, d * deg2rad); |
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212 |
return *this; |
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213 |
} |
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|
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215 |
AffineTransform &AffineTransform::translate(double tx, double ty) |
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216 |
{ |
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217 |
cairo_matrix_translate(&m_transform, tx, ty); |
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|
218 |
return *this; |
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|
219 |
} |
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AffineTransform &AffineTransform::shear(double sx, double sy) |
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{ |
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cairo_matrix_t shear; |
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cairo_matrix_init(&shear, 1, sy, sx, 1, 0, 0); |
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cairo_matrix_t result; |
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cairo_matrix_multiply(&result, &shear, &m_transform); |
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m_transform = result; |
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return *this; |
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} |
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double AffineTransform::det() const |
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{ |
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return m_transform.xx * m_transform.yy - m_transform.xy * m_transform.yx; |
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} |
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AffineTransform AffineTransform::inverse() const |
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{ |
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if (!isInvertible()) return AffineTransform(); |
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cairo_matrix_t result = m_transform; |
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cairo_matrix_invert(&result); |
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return AffineTransform(result); |
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} |
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AffineTransform::operator cairo_matrix_t() const |
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{ |
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return m_transform; |
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} |
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bool AffineTransform::operator== (const AffineTransform &m2) const |
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{ |
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return ((m_transform.xx == m2.m_transform.xx) |
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&& (m_transform.yy == m2.m_transform.yy) |
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&& (m_transform.xy == m2.m_transform.xy) |
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&& (m_transform.yx == m2.m_transform.yx) |
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&& (m_transform.x0 == m2.m_transform.x0) |
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&& (m_transform.y0 == m2.m_transform.y0)); |
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} |
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AffineTransform &AffineTransform::operator*= (const AffineTransform &m2) |
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{ |
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cairo_matrix_t result; |
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cairo_matrix_multiply(&result, &m_transform, &m2.m_transform); |
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m_transform = result; |
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return *this; |
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} |
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AffineTransform AffineTransform::operator* (const AffineTransform &m2) |
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{ |
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cairo_matrix_t result; |
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cairo_matrix_multiply(&result, &m_transform, &m2.m_transform); |
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return result; |
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} |
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} |
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// vim: ts=4 sw=4 et |