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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 nserror plot_line(const struct redraw_context *ctx, const plot_style_t *pstyle, const struct rect *line)
+{
+ if (pstyle->stroke_type == PLOT_OP_TYPE_NONE)
+ return NSERROR_OK;
+
+ [NSGraphicsContext saveGraphicsState];
+ [NSBezierPath clipRect:cocoa_plot_clip_rect];
+
+ NSBezierPath *path = [NSBezierPath bezierPath];
+ [path moveToPoint:cocoa_point(line->x0, line->y0)];
+ [path lineToPoint:cocoa_point(line->x1, line->y1)];
+ cocoa_plot_path_set_stroke_pattern(path, pstyle);
+
+ const bool horizontal = line->y0 == line->y1;
+ const bool vertical = line->x0 == line->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 NSERROR_OK;
+}
+
+static nserror plot_rectangle(const struct redraw_context *ctx, const plot_style_t *pstyle, const struct rect *r)
+{
+ NSRect rect = cocoa_rect(r->x0, r->y0, r->x1, r->y1);
+ NSBezierPath *path = [NSBezierPath bezierPathWithRect:rect];
+ cocoa_plot_render_path(path, pstyle);
+
+ return NSERROR_OK;
+}
+
+static nserror plot_text(const struct redraw_context *ctx, const plot_font_style_t *fstyle, int x, int y, const char *text, size_t length)
+{
+ [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 NSERROR_OK;
+}
+
+void cocoa_set_clip(NSRect rect)
+{
+ cocoa_plot_clip_rect = rect;
+}
+
+static nserror plot_clip(const struct redraw_context *ctx, const struct rect *clip)
+{
+ cocoa_plot_clip_rect = cocoa_rect(clip->x0, clip->y0, clip->x1, clip->y1);
+ return NSERROR_OK;
+}
+
+void cocoa_plot_render_path(NSBezierPath *path, const plot_style_t *pstyle)
+{
+ // Quick exit if the clip rect has a zero size. Core Graphics doesn’t like that.
+ if (cocoa_plot_clip_rect.size.width == 0 || cocoa_plot_clip_rect.size.height == 0) {
+ return;
+ }
+
+ [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 nserror plot_arc(const struct redraw_context *ctx, const plot_style_t *pstyle, int x, int y, int radius, int angle1, int angle2)
+{
+ NSBezierPath *path = [NSBezierPath bezierPath];
+ [path appendBezierPathWithArcWithCenter:NSMakePoint(x, y)
+ radius:radius
+ startAngle:angle1
+ endAngle:angle2
+ clockwise:NO];
+
+ cocoa_plot_render_path(path, pstyle);
+
+ return NSERROR_OK;
+}
+
+static nserror plot_disc(const struct redraw_context *ctx, const plot_style_t *pstyle, int x, int y, int radius)
+{
+ NSBezierPath *path = [NSBezierPath bezierPathWithOvalInRect:
+ NSMakeRect(x - radius, y - radius, 2 * radius, 2 * radius)];
+
+ cocoa_plot_render_path(path, pstyle);
+
+ return NSERROR_OK;
+}
+
+static nserror plot_polygon(const struct redraw_context *ctx, const plot_style_t *pstyle, const int *p, unsigned int n)
+{
+ if (n <= 1)
+ return NSERROR_OK;
+
+ 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 NSERROR_OK;
+}
+
+/* complex path (for SVG) */
+static nserror plot_path(const struct redraw_context *ctx, const plot_style_t *pstyle, const float *p, unsigned int n, float width, const float transform[6])
+{
+ if (n == 0)
+ return NSERROR_OK;
+
+ if (*p != PLOTTER_PATH_MOVE) {
+ NSLOG(netsurf, INFO, "Path does not start with move");
+ return NSERROR_INVALID;
+ }
+
+ NSBezierPath *path = [NSBezierPath bezierPath];
+
+#define NEXT_POINT() ({ const float *c = p; p += 2; NSMakePoint( c[0], c[1] ); })
+
+ 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:
+ NSLOG(netsurf, INFO, "Invalid path");
+ return NSERROR_INVALID;
+ }
+ }
+
+#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 (pstyle->fill_colour != NS_TRANSPARENT) {
+ [cocoa_convert_colour(pstyle->fill_colour) setFill];
+ [path fill];
+ }
+
+ if (pstyle->stroke_colour != NS_TRANSPARENT) {
+ cocoa_center_pixel(true, true);
+ [cocoa_convert_colour(pstyle->stroke_colour) set];
+ [path stroke];
+ }
+
+ CGContextRestoreGState(context);
+
+ return true;
+}
+
+/* Image */
+static nserror plot_bitmap(const struct redraw_context *ctx, struct bitmap *bitmap, int x, int y, int width, int height, 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 NSERROR_OK;
+}
+
+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)
+{
+ cocoa_scale_factor = 1.0;
+ cocoa_half_pixel = 0.5 * cocoa_scale_factor;
+ browser_set_dpi(points_per_inch);
+}
+
+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];
+}