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