| /* |
| * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef SKY_ENGINE_PLATFORM_GRAPHICS_FILTERS_FILTER_H_ |
| #define SKY_ENGINE_PLATFORM_GRAPHICS_FILTERS_FILTER_H_ |
| |
| #include "sky/engine/platform/PlatformExport.h" |
| #include "sky/engine/platform/geometry/FloatRect.h" |
| #include "sky/engine/platform/geometry/FloatSize.h" |
| #include "sky/engine/platform/graphics/ImageBuffer.h" |
| #include "sky/engine/wtf/RefCounted.h" |
| |
| namespace blink { |
| |
| class PLATFORM_EXPORT Filter { |
| public: |
| Filter(const AffineTransform& absoluteTransform) |
| : m_absoluteTransform(absoluteTransform) |
| , m_inverseTransform(absoluteTransform.inverse()) |
| { |
| // Filters can only accept scaling and translating transformations, as coordinates |
| // in most primitives are given in horizontal and vertical directions. |
| ASSERT(!absoluteTransform.b() && !absoluteTransform.c()); |
| } |
| virtual ~Filter() { } |
| |
| void setSourceImage(PassOwnPtr<ImageBuffer> sourceImage) { m_sourceImage = sourceImage; } |
| ImageBuffer* sourceImage() { return m_sourceImage.get(); } |
| |
| const AffineTransform& absoluteTransform() const { return m_absoluteTransform; } |
| |
| void setAbsoluteTransform(const AffineTransform& absoluteTransform) |
| { |
| // Filters can only accept scaling and translating transformations, as coordinates |
| // in most primitives are given in horizontal and vertical directions. |
| ASSERT(!absoluteTransform.b() && !absoluteTransform.c()); |
| m_absoluteTransform = absoluteTransform; |
| m_inverseTransform = absoluteTransform.inverse(); |
| m_absoluteFilterRegion = m_absoluteTransform.mapRect(m_filterRegion); |
| } |
| FloatPoint mapAbsolutePointToLocalPoint(const FloatPoint& point) const { return m_inverseTransform.mapPoint(point); } |
| FloatRect mapLocalRectToAbsoluteRect(const FloatRect& rect) const { return m_absoluteTransform.mapRect(rect); } |
| FloatRect mapAbsoluteRectToLocalRect(const FloatRect& rect) const { return m_inverseTransform.mapRect(rect); } |
| |
| virtual float applyHorizontalScale(float value) const |
| { |
| return value * m_absoluteTransform.a(); |
| } |
| virtual float applyVerticalScale(float value) const |
| { |
| return value * m_absoluteTransform.d(); |
| } |
| virtual FloatPoint3D resolve3dPoint(const FloatPoint3D& point) const { return point; } |
| |
| virtual IntRect sourceImageRect() const = 0; |
| |
| FloatRect absoluteFilterRegion() const { return m_absoluteFilterRegion; } |
| |
| FloatRect filterRegion() const { return m_filterRegion; } |
| void setFilterRegion(const FloatRect& rect) |
| { |
| m_filterRegion = rect; |
| m_absoluteFilterRegion = m_absoluteTransform.mapRect(m_filterRegion); |
| } |
| |
| private: |
| OwnPtr<ImageBuffer> m_sourceImage; |
| AffineTransform m_absoluteTransform; |
| AffineTransform m_inverseTransform; |
| FloatRect m_absoluteFilterRegion; |
| FloatRect m_filterRegion; |
| }; |
| |
| } // namespace blink |
| |
| #endif // SKY_ENGINE_PLATFORM_GRAPHICS_FILTERS_FILTER_H_ |