/* * Copyright (C) 2011 Igalia S.L. * Copyright (c) 2008, Google Inc. All rights reserved. * Copyright (c) 2012, Intel Corporation * * 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 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 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 "PlatformContextCairo.h" #if USE(CAIRO) #include <cairo.h> namespace WebCore { // Encapsulates the additional painting state information we store for each // pushed graphics state. class PlatformContextCairo::State { public: State() = default; struct { RefPtr<cairo_pattern_t> pattern; cairo_matrix_t matrix; } m_mask; }; PlatformContextCairo::PlatformContextCairo(cairo_t* cr) : m_cr(cr) { m_stateStack.append(State()); m_state = &m_stateStack.last(); } void PlatformContextCairo::restore() { if (m_state->m_mask.pattern) { cairo_pop_group_to_source(m_cr.get()); cairo_matrix_t matrix; cairo_get_matrix(m_cr.get(), &matrix); cairo_set_matrix(m_cr.get(), &m_state->m_mask.matrix); cairo_mask(m_cr.get(), m_state->m_mask.pattern.get()); cairo_set_matrix(m_cr.get(), &matrix); } m_stateStack.removeLast(); ASSERT(!m_stateStack.isEmpty()); m_state = &m_stateStack.last(); cairo_restore(m_cr.get()); } PlatformContextCairo::~PlatformContextCairo() = default; void PlatformContextCairo::save() { m_stateStack.append(State()); m_state = &m_stateStack.last(); cairo_save(m_cr.get()); } void PlatformContextCairo::pushImageMask(cairo_surface_t* surface, const FloatRect& rect) { // We must call savePlatformState at least once before we can use image masking, // since we actually apply the mask in restorePlatformState. ASSERT(!m_stateStack.isEmpty()); m_state->m_mask.pattern = adoptRef(cairo_pattern_create_for_surface(surface)); cairo_get_matrix(m_cr.get(), &m_state->m_mask.matrix); cairo_matrix_t matrix; cairo_matrix_init_translate(&matrix, -rect.x(), -rect.y()); cairo_pattern_set_matrix(m_state->m_mask.pattern.get(), &matrix); cairo_push_group(m_cr.get()); } } // namespace WebCore #endif // USE(CAIRO)