summaryrefslogtreecommitdiff
path: root/frontends/cocoa/plotter.m
diff options
context:
space:
mode:
Diffstat (limited to 'frontends/cocoa/plotter.m')
-rw-r--r--frontends/cocoa/plotter.m335
1 files changed, 335 insertions, 0 deletions
diff --git a/frontends/cocoa/plotter.m b/frontends/cocoa/plotter.m
new file mode 100644
index 000000000..dbc9460c4
--- /dev/null
+++ b/frontends/cocoa/plotter.m
@@ -0,0 +1,335 @@
+/*
+ * 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 "desktop/browser.h"
+#import "desktop/plotters.h"
+#import "desktop/plot_style.h"
+
+#import "cocoa/font.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];
+}