1 /* 2 * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved. 3 * Copyright (C) 2007 Alp Toker <alp (at) atoker.com> 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "config.h" 28 #include "Gradient.h" 29 30 #include "CSSParser.h" 31 #include "GraphicsContext.h" 32 #include "PlatformContextCairo.h" 33 #include <cairo.h> 34 35 namespace WebCore { 36 37 void Gradient::platformDestroy() 38 { 39 if (m_gradient) { 40 cairo_pattern_destroy(m_gradient); 41 m_gradient = 0; 42 } 43 } 44 45 cairo_pattern_t* Gradient::platformGradient() 46 { 47 if (m_gradient) 48 return m_gradient; 49 50 if (m_radial) 51 m_gradient = cairo_pattern_create_radial(m_p0.x(), m_p0.y(), m_r0, m_p1.x(), m_p1.y(), m_r1); 52 else 53 m_gradient = cairo_pattern_create_linear(m_p0.x(), m_p0.y(), m_p1.x(), m_p1.y()); 54 55 Vector<ColorStop>::iterator stopIterator = m_stops.begin(); 56 while (stopIterator != m_stops.end()) { 57 cairo_pattern_add_color_stop_rgba(m_gradient, stopIterator->stop, stopIterator->red, stopIterator->green, stopIterator->blue, stopIterator->alpha); 58 ++stopIterator; 59 } 60 61 switch (m_spreadMethod) { 62 case SpreadMethodPad: 63 cairo_pattern_set_extend(m_gradient, CAIRO_EXTEND_PAD); 64 break; 65 case SpreadMethodReflect: 66 cairo_pattern_set_extend(m_gradient, CAIRO_EXTEND_REFLECT); 67 break; 68 case SpreadMethodRepeat: 69 cairo_pattern_set_extend(m_gradient, CAIRO_EXTEND_REPEAT); 70 break; 71 } 72 73 cairo_matrix_t matrix = m_gradientSpaceTransformation; 74 cairo_matrix_invert(&matrix); 75 cairo_pattern_set_matrix(m_gradient, &matrix); 76 77 return m_gradient; 78 } 79 80 void Gradient::setPlatformGradientSpaceTransform(const AffineTransform& gradientSpaceTransformation) 81 { 82 if (m_gradient) { 83 cairo_matrix_t matrix = gradientSpaceTransformation; 84 cairo_matrix_invert(&matrix); 85 cairo_pattern_set_matrix(m_gradient, &matrix); 86 } 87 } 88 89 void Gradient::fill(GraphicsContext* context, const FloatRect& rect) 90 { 91 cairo_t* cr = context->platformContext()->cr(); 92 93 context->save(); 94 cairo_set_source(cr, platformGradient()); 95 cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height()); 96 cairo_fill(cr); 97 context->restore(); 98 } 99 100 } //namespace 101
