/* * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) * Copyright (C) 2015, 2016 Igalia S.L. * * 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 ClipStack_h #define ClipStack_h #include "IntRect.h" #include "IntSize.h" #include <wtf/Vector.h> namespace WebCore { class GraphicsContext3D; class ClipStack { public: struct State { State(const IntRect& scissors = IntRect(), int stencil = 1) : scissorBox(scissors) , stencilIndex(stencil) { } IntRect scissorBox; int stencilIndex; }; // Y-axis should be inverted only when painting into the window. enum class YAxisMode { Default, Inverted, }; void push(); void pop(); State& current() { return clipState; } void reset(const IntRect&, YAxisMode); void intersect(const IntRect&); void setStencilIndex(int); int getStencilIndex() const { return clipState.stencilIndex; } void apply(GraphicsContext3D&); void applyIfNeeded(GraphicsContext3D&); bool isCurrentScissorBoxEmpty() const { return clipState.scissorBox.isEmpty(); } private: Vector<State> clipStack; State clipState; IntSize size; bool clipStateDirty { false }; YAxisMode yAxisMode { YAxisMode::Default }; }; } // namespace WebCore #endif // ClipStack_h