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/*
* Copyright (C) 2010 Igalia S.L.
* Copyright (C) 2011 ProFUSION embedded systems
*
* 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 "CairoUtilities.h"
#include "AffineTransform.h"
#include "Color.h"
#include "FloatPoint.h"
#include "FloatRect.h"
#include "IntRect.h"
#include "OwnPtrCairo.h"
#include "Path.h"
#include "PlatformPathCairo.h"
#include "RefPtrCairo.h"
#include <wtf/Vector.h>
namespace WebCore {
void copyContextProperties(cairo_t* srcCr, cairo_t* dstCr)
{
cairo_set_antialias(dstCr, cairo_get_antialias(srcCr));
size_t dashCount = cairo_get_dash_count(srcCr);
Vector<double> dashes(dashCount);
double offset;
cairo_get_dash(srcCr, dashes.data(), &offset);
cairo_set_dash(dstCr, dashes.data(), dashCount, offset);
cairo_set_line_cap(dstCr, cairo_get_line_cap(srcCr));
cairo_set_line_join(dstCr, cairo_get_line_join(srcCr));
cairo_set_line_width(dstCr, cairo_get_line_width(srcCr));
cairo_set_miter_limit(dstCr, cairo_get_miter_limit(srcCr));
cairo_set_fill_rule(dstCr, cairo_get_fill_rule(srcCr));
}
void setSourceRGBAFromColor(cairo_t* context, const Color& color)
{
float red, green, blue, alpha;
color.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(context, red, green, blue, alpha);
}
void appendPathToCairoContext(cairo_t* to, cairo_t* from)
{
OwnPtr<cairo_path_t> cairoPath = adoptPtr(cairo_copy_path(from));
cairo_append_path(to, cairoPath.get());
}
void setPathOnCairoContext(cairo_t* to, cairo_t* from)
{
cairo_new_path(to);
appendPathToCairoContext(to, from);
}
void appendWebCorePathToCairoContext(cairo_t* context, const Path& path)
{
if (path.isEmpty())
return;
appendPathToCairoContext(context, path.platformPath()->context());
}
void appendRegionToCairoContext(cairo_t* to, const cairo_region_t* region)
{
if (!region)
return;
const int rectCount = cairo_region_num_rectangles(region);
for (int i = 0; i < rectCount; ++i) {
cairo_rectangle_int_t rect;
cairo_region_get_rectangle(region, i, &rect);
cairo_rectangle(to, rect.x, rect.y, rect.width, rect.height);
}
}
cairo_operator_t toCairoOperator(CompositeOperator op)
{
switch (op) {
case CompositeClear:
return CAIRO_OPERATOR_CLEAR;
case CompositeCopy:
return CAIRO_OPERATOR_SOURCE;
case CompositeSourceOver:
return CAIRO_OPERATOR_OVER;
case CompositeSourceIn:
return CAIRO_OPERATOR_IN;
case CompositeSourceOut:
return CAIRO_OPERATOR_OUT;
case CompositeSourceAtop:
return CAIRO_OPERATOR_ATOP;
case CompositeDestinationOver:
return CAIRO_OPERATOR_DEST_OVER;
case CompositeDestinationIn:
return CAIRO_OPERATOR_DEST_IN;
case CompositeDestinationOut:
return CAIRO_OPERATOR_DEST_OUT;
case CompositeDestinationAtop:
return CAIRO_OPERATOR_DEST_ATOP;
case CompositeXOR:
return CAIRO_OPERATOR_XOR;
case CompositePlusDarker:
return CAIRO_OPERATOR_DARKEN;
case CompositePlusLighter:
return CAIRO_OPERATOR_ADD;
case CompositeDifference:
return CAIRO_OPERATOR_DIFFERENCE;
default:
return CAIRO_OPERATOR_SOURCE;
}
}
cairo_operator_t toCairoOperator(BlendMode blendOp)
{
switch (blendOp) {
case BlendModeNormal:
return CAIRO_OPERATOR_OVER;
case BlendModeMultiply:
return CAIRO_OPERATOR_MULTIPLY;
case BlendModeScreen:
return CAIRO_OPERATOR_SCREEN;
case BlendModeOverlay:
return CAIRO_OPERATOR_OVERLAY;
case BlendModeDarken:
return CAIRO_OPERATOR_DARKEN;
case BlendModeLighten:
return CAIRO_OPERATOR_LIGHTEN;
case BlendModeColorDodge:
return CAIRO_OPERATOR_COLOR_DODGE;
case BlendModeColorBurn:
return CAIRO_OPERATOR_COLOR_BURN;
case BlendModeHardLight:
return CAIRO_OPERATOR_HARD_LIGHT;
case BlendModeSoftLight:
return CAIRO_OPERATOR_SOFT_LIGHT;
case BlendModeDifference:
return CAIRO_OPERATOR_DIFFERENCE;
case BlendModeExclusion:
return CAIRO_OPERATOR_EXCLUSION;
case BlendModeHue:
return CAIRO_OPERATOR_HSL_HUE;
case BlendModeSaturation:
return CAIRO_OPERATOR_HSL_SATURATION;
case BlendModeColor:
return CAIRO_OPERATOR_HSL_COLOR;
case BlendModeLuminosity:
return CAIRO_OPERATOR_HSL_LUMINOSITY;
default:
return CAIRO_OPERATOR_OVER;
}
}
void drawPatternToCairoContext(cairo_t* cr, cairo_surface_t* image, const IntSize& imageSize, const FloatRect& tileRect,
const AffineTransform& patternTransform, const FloatPoint& phase, cairo_operator_t op, const FloatRect& destRect)
{
// Avoid NaN
if (!std::isfinite(phase.x()) || !std::isfinite(phase.y()))
return;
cairo_save(cr);
RefPtr<cairo_surface_t> clippedImageSurface = 0;
if (tileRect.size() != imageSize) {
IntRect imageRect = enclosingIntRect(tileRect);
clippedImageSurface = adoptRef(cairo_image_surface_create(CAIRO_FORMAT_ARGB32, imageRect.width(), imageRect.height()));
RefPtr<cairo_t> clippedImageContext = adoptRef(cairo_create(clippedImageSurface.get()));
cairo_set_source_surface(clippedImageContext.get(), image, -tileRect.x(), -tileRect.y());
cairo_paint(clippedImageContext.get());
image = clippedImageSurface.get();
}
cairo_pattern_t* pattern = cairo_pattern_create_for_surface(image);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
cairo_matrix_t patternMatrix = cairo_matrix_t(patternTransform);
cairo_matrix_t phaseMatrix = {1, 0, 0, 1, phase.x() + tileRect.x() * patternTransform.a(), phase.y() + tileRect.y() * patternTransform.d()};
cairo_matrix_t combined;
cairo_matrix_multiply(&combined, &patternMatrix, &phaseMatrix);
cairo_matrix_invert(&combined);
cairo_pattern_set_matrix(pattern, &combined);
cairo_set_operator(cr, op);
cairo_set_source(cr, pattern);
cairo_pattern_destroy(pattern);
cairo_rectangle(cr, destRect.x(), destRect.y(), destRect.width(), destRect.height());
cairo_fill(cr);
cairo_restore(cr);
}
PassRefPtr<cairo_surface_t> copyCairoImageSurface(cairo_surface_t* originalSurface)
{
// Cairo doesn't provide a way to copy a cairo_surface_t.
// See http://lists.cairographics.org/archives/cairo/2007-June/010877.html
// Once cairo provides the way, use the function instead of this.
RefPtr<cairo_surface_t> newSurface = adoptRef(cairo_image_surface_create(cairo_image_surface_get_format(originalSurface),
cairo_image_surface_get_width(originalSurface),
cairo_image_surface_get_height(originalSurface)));
RefPtr<cairo_t> cr = adoptRef(cairo_create(newSurface.get()));
cairo_set_source_surface(cr.get(), originalSurface, 0, 0);
cairo_set_operator(cr.get(), CAIRO_OPERATOR_SOURCE);
cairo_paint(cr.get());
return newSurface.release();
}
void copyRectFromCairoSurfaceToContext(cairo_surface_t* from, cairo_t* to, const IntSize& offset, const IntRect& rect)
{
cairo_set_source_surface(to, from, offset.width(), offset.height());
cairo_rectangle(to, rect.x(), rect.y(), rect.width(), rect.height());
cairo_fill(to);
}
void copyRectFromOneSurfaceToAnother(cairo_surface_t* from, cairo_surface_t* to, const IntSize& offset, const IntRect& rect)
{
RefPtr<cairo_t> context = adoptRef(cairo_create(to));
copyRectFromCairoSurfaceToContext(from, context.get(), offset, rect);
}
} // namespace WebCore
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