1/* 2 * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved. 3 * Copyright (C) 2007 Alp Toker <alp@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 <cairo.h> 33 34namespace WebCore { 35 36void Gradient::platformDestroy() 37{ 38 if (m_gradient) { 39 cairo_pattern_destroy(m_gradient); 40 m_gradient = 0; 41 } 42} 43 44cairo_pattern_t* Gradient::platformGradient() 45{ 46 if (m_gradient) 47 return m_gradient; 48 49 if (m_radial) 50 m_gradient = cairo_pattern_create_radial(m_p0.x(), m_p0.y(), m_r0, m_p1.x(), m_p1.y(), m_r1); 51 else 52 m_gradient = cairo_pattern_create_linear(m_p0.x(), m_p0.y(), m_p1.x(), m_p1.y()); 53 54 Vector<ColorStop>::iterator stopIterator = m_stops.begin(); 55 while (stopIterator != m_stops.end()) { 56 cairo_pattern_add_color_stop_rgba(m_gradient, stopIterator->stop, stopIterator->red, stopIterator->green, stopIterator->blue, stopIterator->alpha); 57 ++stopIterator; 58 } 59 60 switch (m_spreadMethod) { 61 case SpreadMethodPad: 62 cairo_pattern_set_extend(m_gradient, CAIRO_EXTEND_PAD); 63 break; 64 case SpreadMethodReflect: 65 cairo_pattern_set_extend(m_gradient, CAIRO_EXTEND_REFLECT); 66 break; 67 case SpreadMethodRepeat: 68 cairo_pattern_set_extend(m_gradient, CAIRO_EXTEND_REPEAT); 69 break; 70 } 71 72 cairo_matrix_t matrix = m_gradientSpaceTransformation; 73 cairo_matrix_invert(&matrix); 74 cairo_pattern_set_matrix(m_gradient, &matrix); 75 76 return m_gradient; 77} 78 79void Gradient::fill(GraphicsContext* context, const FloatRect& rect) 80{ 81 cairo_t* cr = context->platformContext(); 82 83 context->save(); 84 cairo_set_source(cr, platformGradient()); 85 cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height()); 86 cairo_fill(cr); 87 context->restore(); 88} 89 90} //namespace 91