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-/*
- * Copyright 2011 Sven Weidauer <sven.weidauer@gmail.com>
- *
- * This file is part of NetSurf, http://www.netsurf-browser.org/
- *
- * NetSurf is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * NetSurf 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <Cocoa/Cocoa.h>
-
-#import "utils/log.h"
-#import "utils/utils.h"
-#import "netsurf/browser_window.h"
-#import "netsurf/plotters.h"
-
-#import "cocoa/font.h"
-#import "cocoa/coordinates.h"
-#import "cocoa/plotter.h"
-#import "cocoa/bitmap.h"
-
-static void cocoa_plot_render_path(NSBezierPath *path,const plot_style_t *pstyle);
-static void cocoa_plot_path_set_stroke_pattern(NSBezierPath *path,const plot_style_t *pstyle);
-static inline void cocoa_center_pixel( bool x, bool y );
-
-static NSRect cocoa_plot_clip_rect;
-
-#define colour_red_component( c ) (((c) >> 0) & 0xFF)
-#define colour_green_component( c ) (((c) >> 8) & 0xFF)
-#define colour_blue_component( c ) (((c) >> 16) & 0xFF)
-#define colour_alpha_component( c ) (((c) >> 24) & 0xFF)
-#define colour_from_rgba( r, g, b, a) ((((colour)(r)) << 0) | \
- (((colour)(g)) << 8) | \
- (((colour)(b)) << 16) | \
- (((colour)(a)) << 24))
-#define colour_from_rgb( r, g, b ) colour_from_rgba( (r), (g), (b), 0xFF )
-
-NSColor *cocoa_convert_colour( colour clr )
-{
- return [NSColor colorWithDeviceRed: (float)colour_red_component( clr ) / 0xFF
- green: (float)colour_green_component( clr ) / 0xFF
- blue: (float)colour_blue_component( clr ) / 0xFF
- alpha: 1.0];
-}
-
-static void cocoa_plot_path_set_stroke_pattern(NSBezierPath *path,const plot_style_t *pstyle)
-{
- static const CGFloat dashed_pattern[2] = { 5.0, 2.0 };
- static const CGFloat dotted_pattern[2] = { 2.0, 2.0 };
-
- switch (pstyle->stroke_type) {
- case PLOT_OP_TYPE_DASH:
- [path setLineDash: dashed_pattern count: 2 phase: 0];
- break;
-
- case PLOT_OP_TYPE_DOT:
- [path setLineDash: dotted_pattern count: 2 phase: 0];
- break;
-
- default:
- // ignore
- break;
- }
-
- [path setLineWidth: cocoa_px_to_pt( pstyle->stroke_width > 0 ? pstyle->stroke_width : 1 )];
-}
-
-static bool plot_line(int x0, int y0, int x1, int y1, const plot_style_t *pstyle)
-{
- if (pstyle->stroke_type == PLOT_OP_TYPE_NONE) return true;
-
- [NSGraphicsContext saveGraphicsState];
- [NSBezierPath clipRect: cocoa_plot_clip_rect];
-
- NSBezierPath *path = [NSBezierPath bezierPath];
- [path moveToPoint: cocoa_point( x0, y0 )];
- [path lineToPoint: cocoa_point( x1, y1 )];
- cocoa_plot_path_set_stroke_pattern( path, pstyle );
-
- const bool horizontal = y0 == y1;
- const bool vertical = x0 == x1;
- const bool oddThickness = pstyle->stroke_width != 0 ? (pstyle->stroke_width % 2) != 0 : true;
-
- if (oddThickness) cocoa_center_pixel( !horizontal, !vertical );
-
- [cocoa_convert_colour( pstyle->stroke_colour ) set];
- [path stroke];
-
- [NSGraphicsContext restoreGraphicsState];
-
- return true;
-}
-
-static bool plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *pstyle)
-{
- NSRect rect = cocoa_rect( x0, y0, x1, y1 );
- NSBezierPath *path = [NSBezierPath bezierPathWithRect: rect];
- cocoa_plot_render_path( path, pstyle );
-
- return true;
-}
-
-static bool plot_text(int x, int y, const char *text, size_t length,
- const plot_font_style_t *fstyle)
-{
- [NSGraphicsContext saveGraphicsState];
- [NSBezierPath clipRect: cocoa_plot_clip_rect];
-
- cocoa_draw_string( cocoa_px_to_pt( x ), cocoa_px_to_pt( y ), text, length, fstyle );
-
- [NSGraphicsContext restoreGraphicsState];
-
- return true;
-}
-
-void cocoa_set_clip( NSRect rect )
-{
- cocoa_plot_clip_rect = rect;
-}
-
-static bool plot_clip(const struct rect *clip)
-{
- cocoa_plot_clip_rect = cocoa_rect( clip->x0, clip->y0, clip->x1, clip->y1 );
- return true;
-}
-
-void cocoa_plot_render_path(NSBezierPath *path,const plot_style_t *pstyle)
-{
- [NSGraphicsContext saveGraphicsState];
- [NSBezierPath clipRect: cocoa_plot_clip_rect];
-
- if (pstyle->fill_type != PLOT_OP_TYPE_NONE) {
- [cocoa_convert_colour( pstyle->fill_colour ) setFill];
- [path fill];
- }
-
- if (pstyle->stroke_type != PLOT_OP_TYPE_NONE) {
- if (pstyle->stroke_width == 0 || pstyle->stroke_width % 2 != 0) cocoa_center_pixel( true, true );
-
- cocoa_plot_path_set_stroke_pattern(path,pstyle);
-
- [cocoa_convert_colour( pstyle->stroke_colour ) set];
-
- [path stroke];
- }
-
- [NSGraphicsContext restoreGraphicsState];
-}
-
-static bool plot_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *pstyle)
-{
- NSBezierPath *path = [NSBezierPath bezierPath];
- [path appendBezierPathWithArcWithCenter: NSMakePoint( x, y ) radius: radius
- startAngle: angle1 endAngle: angle2
- clockwise: NO];
-
- cocoa_plot_render_path( path, pstyle);
-
- return true;
-}
-
-static bool plot_disc(int x, int y, int radius, const plot_style_t *pstyle)
-{
- NSBezierPath *path = [NSBezierPath bezierPathWithOvalInRect:
- NSMakeRect( x - radius, y-radius, 2*radius, 2*radius )];
-
- cocoa_plot_render_path( path, pstyle );
-
- return true;
-}
-
-static bool plot_polygon(const int *p, unsigned int n, const plot_style_t *pstyle)
-{
- if (n <= 1) return true;
-
- NSBezierPath *path = [NSBezierPath bezierPath];
- [path moveToPoint: cocoa_point( p[0], p[1] )];
- for (unsigned i = 1; i < n; i++) {
- [path lineToPoint: cocoa_point( p[2*i], p[2*i+1] )];
- }
- [path closePath];
-
- cocoa_plot_render_path( path, pstyle );
-
- return true;
-}
-
-/* complex path (for SVG) */
-static bool plot_path(const float *p, unsigned int n, colour fill, float width,
- colour c, const float transform[6])
-{
- if (n == 0) return true;
-
- if (*p != PLOTTER_PATH_MOVE) {
- LOG("Path does not start with move");
- return false;
- }
-
- NSBezierPath *path = [NSBezierPath bezierPath];
-
-#define NEXT_POINT() NSMakePoint( *p++, *p++ )
-
- while (n--) {
- switch ((int)*p++) {
- case PLOTTER_PATH_MOVE: {
- const NSPoint pt = NEXT_POINT();
- [path moveToPoint: pt];
- break;
- }
-
- case PLOTTER_PATH_LINE: {
- const NSPoint pt = NEXT_POINT();
- [path lineToPoint: pt];
- break;
- }
-
- case PLOTTER_PATH_BEZIER: {
- const NSPoint cp1 = NEXT_POINT();
- const NSPoint cp2 = NEXT_POINT();
- const NSPoint ep = NEXT_POINT();
- [path curveToPoint: ep controlPoint1: cp1 controlPoint2: cp2];
- break;
- }
-
- case PLOTTER_PATH_CLOSE:
- [path closePath];
- break;
-
- default:
- LOG("Invalid path");
- return false;
- }
- }
-
-#undef NEXT_POINT
-
- [path setLineWidth: width];
-
- CGContextRef context = [[NSGraphicsContext currentContext] graphicsPort];
- CGContextSaveGState( context );
-
- CGContextClipToRect( context, NSRectToCGRect( cocoa_plot_clip_rect ) );
-
- CGContextConcatCTM( context, CGAffineTransformMake( transform[0], transform[1], transform[2],
- transform[3], transform[4], transform[5] ) );
-
- if (fill != NS_TRANSPARENT) {
- [cocoa_convert_colour( fill ) setFill];
- [path fill];
- }
-
- if (c != NS_TRANSPARENT) {
- cocoa_center_pixel( true, true );
- [cocoa_convert_colour( c ) set];
- [path stroke];
- }
-
- CGContextRestoreGState( context );
-
- return true;
-}
-
-/* Image */
-static bool plot_bitmap(int x, int y, int width, int height,
- struct bitmap *bitmap, colour bg,
- bitmap_flags_t flags)
-{
- CGContextRef context = [[NSGraphicsContext currentContext] graphicsPort];
- CGContextSaveGState( context );
-
- CGContextClipToRect( context, NSRectToCGRect( cocoa_plot_clip_rect ) );
-
- const bool tileX = flags & BITMAPF_REPEAT_X;
- const bool tileY = flags & BITMAPF_REPEAT_Y;
-
- CGImageRef img = cocoa_get_cgimage( bitmap );
-
- CGRect rect = NSRectToCGRect( cocoa_rect_wh( x, y, width, height ) );
-
- if (tileX || tileY) {
- CGContextDrawTiledImage( context, rect, img );
- } else {
- CGContextDrawImage( context, rect, img );
- }
-
- CGContextRestoreGState( context );
-
- return true;
-}
-
-const struct plotter_table cocoa_plotters = {
- .clip = plot_clip,
- .arc = plot_arc,
- .disc = plot_disc,
- .rectangle = plot_rectangle,
- .line = plot_line,
- .polygon = plot_polygon,
-
- .path = plot_path,
-
- .bitmap = plot_bitmap,
-
- .text = plot_text,
-
- .option_knockout = true
-};
-
-
-CGFloat cocoa_scale_factor;
-static const CGFloat points_per_inch = 72.0;
-static CGFloat cocoa_half_pixel;
-
-void cocoa_update_scale_factor( void )
-{
- const CGFloat scale = [[NSScreen mainScreen] userSpaceScaleFactor];
- cocoa_scale_factor = scale == 1.0 ? 1.0 : 1.0 / scale;
- cocoa_half_pixel = 0.5 * cocoa_scale_factor;
- browser_set_dpi( points_per_inch * scale );
-}
-
-static inline void cocoa_center_pixel( bool x, bool y )
-{
- NSAffineTransform *transform = [NSAffineTransform transform];
- [transform translateXBy: x ? cocoa_half_pixel : 0.0 yBy: y ? cocoa_half_pixel : 0.0];
- [transform concat];
-}