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      1 /*
      2  * Copyright (C) 2006, 2007, 2008 Apple 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 "core/html/canvas/CanvasGradient.h"
     29 
     30 #include "bindings/core/v8/ExceptionState.h"
     31 #include "core/dom/ExceptionCode.h"
     32 #include "core/html/canvas/CanvasPattern.h"
     33 #include "core/html/canvas/CanvasStyle.h"
     34 
     35 namespace blink {
     36 
     37 CanvasGradient::CanvasGradient(const FloatPoint& p0, const FloatPoint& p1)
     38     : m_gradient(Gradient::create(p0, p1))
     39 {
     40 }
     41 
     42 CanvasGradient::CanvasGradient(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1)
     43     : m_gradient(Gradient::create(p0, r0, p1, r1))
     44 {
     45 }
     46 
     47 void CanvasGradient::addColorStop(float value, const String& color, ExceptionState& exceptionState)
     48 {
     49     if (!(value >= 0 && value <= 1.0f)) {
     50         exceptionState.throwDOMException(IndexSizeError, "The provided value (" + String::number(value) + ") is outside the range (0.0, 1.0).");
     51         return;
     52     }
     53 
     54     RGBA32 rgba = 0;
     55     if (!parseColorOrCurrentColor(rgba, color, 0 /*canvas*/)) {
     56         exceptionState.throwDOMException(SyntaxError, "The value provided ('" + color + "') could not be parsed as a color.");
     57         return;
     58     }
     59 
     60     m_gradient->addColorStop(value, Color(rgba));
     61 }
     62 
     63 } // namespace
     64