| /* |
| * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved. |
| * Copyright (C) 2007 Alp Toker <alp@atoker.com> |
| * |
| * 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 "Gradient.h" |
| |
| #include "CSSParser.h" |
| #include "GraphicsContext.h" |
| |
| #include <ApplicationServices/ApplicationServices.h> |
| |
| namespace WebCore { |
| |
| void Gradient::platformDestroy() |
| { |
| #ifdef BUILDING_ON_TIGER |
| CGShadingRelease(m_gradient); |
| #else |
| CGGradientRelease(m_gradient); |
| #endif |
| m_gradient = 0; |
| } |
| |
| #ifdef BUILDING_ON_TIGER |
| static void gradientCallback(void* info, const CGFloat* in, CGFloat* out) |
| { |
| float r, g, b, a; |
| static_cast<const Gradient*>(info)->getColor(*in, &r, &g, &b, &a); |
| out[0] = r; |
| out[1] = g; |
| out[2] = b; |
| out[3] = a; |
| } |
| |
| CGShadingRef Gradient::platformGradient() |
| { |
| if (m_gradient) |
| return m_gradient; |
| |
| const CGFloat intervalRanges[2] = { 0, 1 }; |
| const CGFloat colorComponentRanges[4 * 2] = { 0, 1, 0, 1, 0, 1, 0, 1 }; |
| const CGFunctionCallbacks gradientCallbacks = { 0, gradientCallback, 0 }; |
| RetainPtr<CGFunctionRef> colorFunction(AdoptCF, CGFunctionCreate(this, 1, intervalRanges, 4, colorComponentRanges, &gradientCallbacks)); |
| |
| static CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); |
| |
| if (m_radial) |
| m_gradient = CGShadingCreateRadial(colorSpace, m_p0, m_r0, m_p1, m_r1, colorFunction.get(), true, true); |
| else |
| m_gradient = CGShadingCreateAxial(colorSpace, m_p0, m_p1, colorFunction.get(), true, true); |
| |
| return m_gradient; |
| } |
| #else |
| CGGradientRef Gradient::platformGradient() |
| { |
| if (m_gradient) |
| return m_gradient; |
| |
| static CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); |
| |
| sortStopsIfNecessary(); |
| |
| const int cReservedStops = 3; |
| Vector<CGFloat, 4 * cReservedStops> colorComponents; |
| colorComponents.reserveCapacity(m_stops.size() * 4); // RGBA components per stop |
| |
| Vector<CGFloat, cReservedStops> locations; |
| locations.reserveCapacity(m_stops.size()); |
| |
| for (size_t i = 0; i < m_stops.size(); ++i) { |
| colorComponents.uncheckedAppend(m_stops[i].red); |
| colorComponents.uncheckedAppend(m_stops[i].green); |
| colorComponents.uncheckedAppend(m_stops[i].blue); |
| colorComponents.uncheckedAppend(m_stops[i].alpha); |
| |
| locations.uncheckedAppend(m_stops[i].stop); |
| } |
| |
| m_gradient = CGGradientCreateWithColorComponents(colorSpace, colorComponents.data(), locations.data(), m_stops.size()); |
| |
| return m_gradient; |
| } |
| #endif |
| |
| void Gradient::fill(GraphicsContext* context, const FloatRect& rect) |
| { |
| context->clip(rect); |
| paint(context); |
| } |
| |
| void Gradient::paint(GraphicsContext* context) |
| { |
| #ifdef BUILDING_ON_TIGER |
| CGContextDrawShading(context->platformContext(), platformGradient()); |
| #else |
| CGGradientDrawingOptions extendOptions = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation; |
| if (m_radial) |
| CGContextDrawRadialGradient(context->platformContext(), platformGradient(), m_p0, m_r0, m_p1, m_r1, extendOptions); |
| else |
| CGContextDrawLinearGradient(context->platformContext(), platformGradient(), m_p0, m_p1, extendOptions); |
| #endif |
| } |
| |
| } //namespace |