| /* |
| * Copyright (C) 2007 Alp Toker <alp@atoker.com> |
| * |
| * 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. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(SVG) |
| #include "SVGPaintServerGradient.h" |
| #include "SVGPaintServerLinearGradient.h" |
| #include "SVGPaintServerRadialGradient.h" |
| |
| #include "GraphicsContext.h" |
| #include "RenderObject.h" |
| #include "RenderPath.h" |
| #include "RenderStyle.h" |
| #include "SVGGradientElement.h" |
| |
| namespace WebCore { |
| |
| bool SVGPaintServerGradient::setup(GraphicsContext*& context, const RenderObject* object, SVGPaintTargetType type, bool isPaintingText) const |
| { |
| m_ownerElement->buildGradient(); |
| |
| cairo_t* cr = context->platformContext(); |
| cairo_pattern_t* pattern; |
| |
| cairo_matrix_t matrix; |
| cairo_matrix_init_identity (&matrix); |
| const cairo_matrix_t gradient_matrix = gradientTransform(); |
| |
| // TODO: revise this code, it is known not to work in many cases |
| if (this->type() == LinearGradientPaintServer) { |
| const SVGPaintServerLinearGradient* linear = static_cast<const SVGPaintServerLinearGradient*>(this); |
| |
| if (boundingBoxMode()) { |
| // TODO: use RenderPathCairo's strokeBBox? |
| double x1, y1, x2, y2; |
| cairo_fill_extents(cr, &x1, &y1, &x2, &y2); |
| cairo_matrix_translate(&matrix, x1, y1); |
| cairo_matrix_scale(&matrix, x2 - x1, y2 - y1); |
| cairo_matrix_multiply(&matrix, &matrix, &gradient_matrix); |
| cairo_matrix_invert(&matrix); |
| } |
| |
| double x0, x1, y0, y1; |
| x0 = linear->gradientStart().x(); |
| y0 = linear->gradientStart().y(); |
| x1 = linear->gradientEnd().x(); |
| y1 = linear->gradientEnd().y(); |
| pattern = cairo_pattern_create_linear(x0, y0, x1, y1); |
| |
| } else if (this->type() == RadialGradientPaintServer) { |
| // const SVGPaintServerRadialGradient* radial = static_cast<const SVGPaintServerRadialGradient*>(this); |
| // TODO: pattern = cairo_pattern_create_radial(); |
| return false; |
| } else { |
| return false; |
| } |
| |
| cairo_pattern_set_filter(pattern, CAIRO_FILTER_BILINEAR); |
| |
| switch (spreadMethod()) { |
| case SPREADMETHOD_PAD: |
| cairo_pattern_set_extend(pattern, CAIRO_EXTEND_PAD); |
| break; |
| case SPREADMETHOD_REFLECT: |
| cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REFLECT); |
| break; |
| case SPREADMETHOD_REPEAT: |
| cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT); |
| break; |
| default: |
| cairo_pattern_set_extend(pattern, CAIRO_EXTEND_NONE); |
| break; |
| } |
| |
| cairo_pattern_set_matrix(pattern, &matrix); |
| |
| const Vector<SVGGradientStop>& stops = gradientStops(); |
| |
| for (unsigned i = 0; i < stops.size(); ++i) { |
| float offset = stops[i].first; |
| Color color = stops[i].second; |
| |
| cairo_pattern_add_color_stop_rgba(pattern, offset, color.red(), color.green(), color.blue(), color.alpha()); |
| } |
| |
| cairo_set_source(cr, pattern); |
| cairo_pattern_destroy(pattern); |
| |
| return true; |
| } |
| |
| } // namespace WebCore |
| |
| #endif |