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/*****************************************************************************
* Copyright 2003 - 2010 Craig Drummond <craig.p.drummond@gmail.com> *
* Copyright 2013 - 2015 Yichao Yu <yyc1992@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 2.1 of the *
* License, or (at your option) version 3, or any later version accepted *
* by the membership of KDE e.V. (or its successor approved by the *
* membership of KDE e.V.), which shall act as a proxy defined in *
* Section 6 of version 3 of the license. *
* *
* This program 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library. If not, *
* see <http://www.gnu.org/licenses/>. *
*****************************************************************************/
#include "utils_p.h"
#include <qtcurve-utils/number.h>
namespace QtCurve {
namespace Rect {
QTC_EXPORT void
union_(const QtcRect *src1, const QtcRect *src2, QtcRect *dest)
{
// Copied from gdk_rectangle_union
int dest_x = qtcMin(src1->x, src2->x);
int dest_y = qtcMin(src1->y, src2->y);
dest->width = qtcMax(src1->x + src1->width,
src2->x + src2->width) - dest_x;
dest->height = qtcMax(src1->y + src1->height,
src2->y + src2->height) - dest_y;
dest->x = dest_x;
dest->y = dest_y;
}
QTC_EXPORT bool
intersect(const QtcRect *src1, const QtcRect *src2, QtcRect *dest)
{
// Copied from gdk_rectangle_intersect
int dest_x = qtcMax(src1->x, src2->x);
int dest_y = qtcMax(src1->y, src2->y);
int dest_x2 = qtcMin(src1->x + src1->width, src2->x + src2->width);
int dest_y2 = qtcMin(src1->y + src1->height, src2->y + src2->height);
if (dest_x2 > dest_x && dest_y2 > dest_y) {
if (dest) {
dest->x = dest_x;
dest->y = dest_y;
dest->width = dest_x2 - dest_x;
dest->height = dest_y2 - dest_y;
}
return true;
} else if (dest) {
dest->width = 0;
dest->height = 0;
}
return false;
}
}
namespace Cairo {
QTC_EXPORT void
pathPoints(cairo_t *cr, const GdkPoint *pts, int count)
{
// The (0.5, 0.5) offset here is for moving the path to the center of the
// pixel.
cairo_move_to(cr, pts[0].x + 0.5, pts[0].y + 0.5);
for (int i = 1;i < count;i++) {
cairo_line_to(cr, pts[i].x + 0.5, pts[i].y + 0.5);
}
}
static void
pathRegion(cairo_t *cr, const cairo_region_t *region)
{
// Copied from gdk_cairo_region.
int n_boxes = cairo_region_num_rectangles(region);
QtcRect box;
for (int i = 0;i < n_boxes;i++) {
cairo_region_get_rectangle(region, i, &box);
cairo_rectangle(cr, box.x, box.y, box.width, box.height);
}
}
QTC_EXPORT void
clipRegion(cairo_t *cr, const cairo_region_t *region)
{
cairo_new_path(cr);
if (qtcLikely(region)) {
pathRegion(cr, region);
cairo_clip(cr);
}
}
QTC_EXPORT void
clipRect(cairo_t *cr, const QtcRect *_rect)
{
cairo_new_path(cr);
if (qtcLikely(_rect)) {
cairo_rectangle(cr, _rect->x, _rect->y, _rect->width, _rect->height);
cairo_clip(cr);
}
}
QTC_EXPORT void
setColor(cairo_t *cr, const GdkColor *col, double a)
{
cairo_set_source_rgba(cr, col->red / 65535.0, col->green / 65535.0,
col->blue / 65535.0, a);
}
QTC_EXPORT void
patternAddColorStop(cairo_pattern_t *pt, double offset,
const GdkColor *col, double a)
{
cairo_pattern_add_color_stop_rgba(pt, offset, col->red / 65535.0,
col->green / 65535.0,
col->blue / 65535.0, a);
}
QTC_EXPORT void
pathTopLeft(cairo_t *cr, double xd, double yd, double width,
double height, double radius, ECornerBits round)
{
bool rounded = radius > 0.0;
if (rounded && round & CORNER_BL) {
cairo_arc(cr, xd + radius, yd + height - radius, radius,
M_PI * 0.75, M_PI);
} else {
cairo_move_to(cr, xd, yd + height);
}
if (rounded && round & CORNER_TL) {
cairo_arc(cr, xd + radius, yd + radius, radius, M_PI, M_PI * 1.5);
} else {
cairo_line_to(cr, xd, yd);
}
if (rounded && round & CORNER_TR) {
cairo_arc(cr, xd + width - radius, yd + radius,
radius, M_PI * 1.5, M_PI * 1.75);
} else {
cairo_line_to(cr, xd + width, yd);
}
}
QTC_EXPORT void
pathBottomRight(cairo_t *cr, double xd, double yd, double width,
double height, double radius, ECornerBits round)
{
bool rounded = radius > 0.0;
if (rounded && round & CORNER_TR) {
cairo_arc(cr, xd + width - radius, yd + radius, radius, M_PI * 1.75, 0);
} else {
cairo_move_to(cr, xd + width, yd);
}
if (rounded && round & CORNER_BR) {
cairo_arc(cr, xd + width - radius, yd + height - radius,
radius, 0, M_PI * 0.5);
} else {
cairo_line_to(cr, xd + width, yd + height);
}
if (rounded && round & CORNER_BL) {
cairo_arc(cr, xd + radius, yd + height - radius,
radius, M_PI * 0.5, M_PI * 0.75);
} else {
cairo_line_to(cr, xd, yd + height);
}
}
QTC_EXPORT void
pathWhole(cairo_t *cr, double xd, double yd, double width,
double height, double radius, ECornerBits round)
{
bool rounded = radius > 0.0;
if (rounded && round & CORNER_TL) {
cairo_move_to(cr, xd + radius, yd);
} else {
cairo_move_to(cr, xd, yd);
}
if (rounded && round & CORNER_TR) {
cairo_arc(cr, xd + width - radius, yd + radius, radius,
M_PI * 1.5, M_PI * 2);
} else {
cairo_line_to(cr, xd + width, yd);
}
if (rounded && round & CORNER_BR) {
cairo_arc(cr, xd + width - radius, yd + height - radius,
radius, 0, M_PI * 0.5);
} else {
cairo_line_to(cr, xd + width, yd + height);
}
if (rounded && round & CORNER_BL) {
cairo_arc(cr, xd + radius, yd + height - radius,
radius, M_PI * 0.5, M_PI);
} else {
cairo_line_to(cr, xd, yd + height);
}
if (rounded && round & CORNER_TL) {
cairo_arc(cr, xd + radius, yd + radius, radius, M_PI, M_PI * 1.5);
} else {
cairo_line_to(cr, xd, yd);
}
}
}
}
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