/* GTK - The GIMP Toolkit * Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org> * Copyright (C) 2011 Red Hat, Inc. * * Authors: Carlos Garnacho <carlosg@gnome.org> * Cosimo Cecchi <cosimoc@gnome.org> * * This library 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 of the License, or (at your option) any later version. * * This library 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 <config.h> #include "gtkrenderborderprivate.h" #include <cairo-gobject.h> #include <math.h> #include "gtkcssbordervalueprivate.h" #include "gtkcssenumvalueprivate.h" #include "gtkcssimagevalueprivate.h" #include "gtkcssnumbervalueprivate.h" #include "gtkcssrepeatvalueprivate.h" #include "gtkcsscolorvalueprivate.h" #include "gtkcssstyleprivate.h" #include "gtkhslaprivate.h" #include "gtkroundedboxprivate.h" #include "gtksnapshotprivate.h" #include "gsk/gskroundedrectprivate.h" typedef struct _GtkBorderImage GtkBorderImage; struct _GtkBorderImage { GtkCssImage *source; GtkCssValue *slice; GtkCssValue *width; GtkCssValue *repeat; }; static gboolean gtk_border_image_init (GtkBorderImage *image, GtkCssStyle *style) { image->source = _gtk_css_image_value_get_image (style->border->border_image_source); if (image->source == NULL) return FALSE; image->slice = style->border->border_image_slice; image->width = style->border->border_image_width; image->repeat = style->border->border_image_repeat; return TRUE; } typedef struct _GtkBorderImageSliceSize GtkBorderImageSliceSize; struct _GtkBorderImageSliceSize { double offset; double size; }; static void gtk_border_image_compute_border_size (GtkBorderImageSliceSize sizes[3], double offset, double area_size, double start_border_width, double end_border_width, const GtkCssValue *start_border, const GtkCssValue *end_border) { double start, end; if (gtk_css_number_value_get_dimension (start_border) == GTK_CSS_DIMENSION_NUMBER) start = start_border_width * _gtk_css_number_value_get (start_border, 100); else start = _gtk_css_number_value_get (start_border, area_size); if (gtk_css_number_value_get_dimension (end_border) == GTK_CSS_DIMENSION_NUMBER) end = end_border_width * _gtk_css_number_value_get (end_border, 100); else end = _gtk_css_number_value_get (end_border, area_size); /* XXX: reduce vertical and horizontal by the same factor */ if (start + end > area_size) { start = start * area_size / (start + end); end = end * area_size / (start + end); } sizes[0].offset = offset; sizes[0].size = start; sizes[1].offset = offset + start; sizes[1].size = area_size - start - end; sizes[2].offset = offset + area_size - end; sizes[2].size = end; } static void gtk_border_image_render_slice (cairo_t *cr, cairo_surface_t *slice, double slice_width, double slice_height, double x, double y, double width, double height, GtkCssRepeatStyle hrepeat, GtkCssRepeatStyle vrepeat) { double hscale, vscale; double xstep, ystep; cairo_extend_t extend = CAIRO_EXTEND_PAD; cairo_matrix_t matrix; cairo_pattern_t *pattern; /* We can't draw center tiles yet */ g_assert (hrepeat == GTK_CSS_REPEAT_STYLE_STRETCH || vrepeat == GTK_CSS_REPEAT_STYLE_STRETCH); hscale = width / slice_width; vscale = height / slice_height; xstep = width; ystep = height; switch (hrepeat) { case GTK_CSS_REPEAT_STYLE_REPEAT: extend = CAIRO_EXTEND_REPEAT; hscale = vscale; break; case GTK_CSS_REPEAT_STYLE_SPACE: { double space, n; extend = CAIRO_EXTEND_NONE; hscale = vscale; xstep = hscale * slice_width; n = floor (width / xstep); space = (width - n * xstep) / (n + 1); xstep += space; x += space; width -= 2 * space; } break; case GTK_CSS_REPEAT_STYLE_STRETCH: break; case GTK_CSS_REPEAT_STYLE_ROUND: extend = CAIRO_EXTEND_REPEAT; hscale = width / (slice_width * MAX (round (width / (slice_width * vscale)), 1)); break; default: g_assert_not_reached (); break; } switch (vrepeat) { case GTK_CSS_REPEAT_STYLE_REPEAT: extend = CAIRO_EXTEND_REPEAT; vscale = hscale; break; case GTK_CSS_REPEAT_STYLE_SPACE: { double space, n; extend = CAIRO_EXTEND_NONE; vscale = hscale; ystep = vscale * slice_height; n = floor (height / ystep); space = (height - n * ystep) / (n + 1); ystep += space; y += space; height -= 2 * space; } break; case GTK_CSS_REPEAT_STYLE_STRETCH: break; case GTK_CSS_REPEAT_STYLE_ROUND: extend = CAIRO_EXTEND_REPEAT; vscale = height / (slice_height * MAX (round (height / (slice_height * hscale)), 1)); break; default: g_assert_not_reached (); break; } pattern = cairo_pattern_create_for_surface (slice); cairo_matrix_init_translate (&matrix, hrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? slice_width / 2 : 0, vrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? slice_height / 2 : 0); cairo_matrix_scale (&matrix, 1 / hscale, 1 / vscale); cairo_matrix_translate (&matrix, hrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? - width / 2 : 0, vrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? - height / 2 : 0); cairo_pattern_set_matrix (pattern, &matrix); cairo_pattern_set_extend (pattern, extend); cairo_save (cr); cairo_translate (cr, x, y); for (y = 0; y < height; y += ystep) { for (x = 0; x < width; x += xstep) { cairo_save (cr); cairo_translate (cr, x, y); cairo_set_source (cr, pattern); cairo_rectangle (cr, 0, 0, xstep, ystep); cairo_fill (cr); cairo_restore (cr); } } cairo_restore (cr); cairo_pattern_destroy (pattern); } static void gtk_border_image_compute_slice_size (GtkBorderImageSliceSize sizes[3], int surface_size, int start_size, int end_size) { sizes[0].size = MIN (start_size, surface_size); sizes[0].offset = 0; sizes[2].size = MIN (end_size, surface_size); sizes[2].offset = surface_size - sizes[2].size; sizes[1].size = MAX (0, surface_size - sizes[0].size - sizes[2].size); sizes[1].offset = sizes[0].size; } static void gtk_border_image_render (GtkBorderImage *image, const float border_width[4], cairo_t *cr, const graphene_rect_t *rect) { cairo_surface_t *surface, *slice; GtkBorderImageSliceSize vertical_slice[3], horizontal_slice[3]; GtkBorderImageSliceSize vertical_border[3], horizontal_border[3]; double source_width, source_height; int h, v; _gtk_css_image_get_concrete_size (image->source, 0, 0, rect->size.width, rect->size.height, &source_width, &source_height); /* XXX: Optimize for (source_width == width && source_height == height) */ surface = _gtk_css_image_get_surface (image->source, cairo_get_target (cr), source_width, source_height); gtk_border_image_compute_slice_size (horizontal_slice, source_width, _gtk_css_number_value_get (_gtk_css_border_value_get_left (image->slice), source_width), _gtk_css_number_value_get (_gtk_css_border_value_get_right (image->slice), source_width)); gtk_border_image_compute_slice_size (vertical_slice, source_height, _gtk_css_number_value_get (_gtk_css_border_value_get_top (image->slice), source_height), _gtk_css_number_value_get (_gtk_css_border_value_get_bottom (image->slice), source_height)); gtk_border_image_compute_border_size (horizontal_border, rect->origin.x, rect->size.width, border_width[GTK_CSS_LEFT], border_width[GTK_CSS_RIGHT], _gtk_css_border_value_get_left (image->width), _gtk_css_border_value_get_right (image->width)); gtk_border_image_compute_border_size (vertical_border, rect->origin.y, rect->size.height, border_width[GTK_CSS_TOP], border_width[GTK_CSS_BOTTOM], _gtk_css_border_value_get_top (image->width), _gtk_css_border_value_get_bottom(image->width)); for (v = 0; v < 3; v++) { if (vertical_slice[v].size == 0 || vertical_border[v].size == 0) continue; for (h = 0; h < 3; h++) { if (horizontal_slice[h].size == 0 || horizontal_border[h].size == 0) continue; if (h == 1 && v == 1) continue; slice = cairo_surface_create_for_rectangle (surface, horizontal_slice[h].offset, vertical_slice[v].offset, horizontal_slice[h].size, vertical_slice[v].size); gtk_border_image_render_slice (cr, slice, horizontal_slice[h].size, vertical_slice[v].size, horizontal_border[h].offset, vertical_border[v].offset, horizontal_border[h].size, vertical_border[v].size, h == 1 ? _gtk_css_border_repeat_value_get_x (image->repeat) : GTK_CSS_REPEAT_STYLE_STRETCH, v == 1 ? _gtk_css_border_repeat_value_get_y (image->repeat) : GTK_CSS_REPEAT_STYLE_STRETCH); cairo_surface_destroy (slice); } } cairo_surface_destroy (surface); } static void snapshot_frame_fill (GtkSnapshot *snapshot, const GskRoundedRect *outline, const float border_width[4], const GdkRGBA colors[4], guint hidden_side) { if (hidden_side) { GdkRGBA real_colors[4]; guint i; for (i = 0; i < 4; i++) { if (hidden_side & (1 << i)) real_colors[i] = (GdkRGBA) { 0, 0, 0, 0 }; else real_colors[i] = colors[i]; } snapshot_frame_fill (snapshot, outline, border_width, real_colors, 0); return; } gtk_snapshot_append_border (snapshot, outline, border_width, colors); } static void set_stroke_style (cairo_t *cr, double line_width, GtkBorderStyle style, double length) { double segments[2]; double n; cairo_set_line_width (cr, line_width); if (style == GTK_BORDER_STYLE_DOTTED) { n = round (0.5 * length / line_width); segments[0] = 0; segments[1] = n ? length / n : 2; cairo_set_dash (cr, segments, G_N_ELEMENTS (segments), 0); cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND); } else { n = length / line_width; /* Optimize the common case of an integer-sized rectangle * Again, we care about focus rectangles. */ if (n == nearbyint (n)) { segments[0] = line_width; segments[1] = 2 * line_width; } else { n = round ((1. / 3) * n); segments[0] = n ? (1. / 3) * length / n : 1; segments[1] = 2 * segments[0]; } cairo_set_dash (cr, segments, G_N_ELEMENTS (segments), 0); cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER); } } static void render_frame_stroke (cairo_t *cr, const GskRoundedRect *border_box, const double border_width[4], GdkRGBA colors[4], guint hidden_side, GtkBorderStyle stroke_style) { gboolean different_colors, different_borders; GskRoundedRect stroke_box; guint i; different_colors = !gdk_rgba_equal (&colors[0], &colors[1]) || !gdk_rgba_equal (&colors[0], &colors[2]) || !gdk_rgba_equal (&colors[0], &colors[3]); different_borders = border_width[0] != border_width[1] || border_width[0] != border_width[2] || border_width[0] != border_width[3] ; stroke_box = *border_box; gsk_rounded_rect_shrink (&stroke_box, border_width[GTK_CSS_TOP] / 2.0, border_width[GTK_CSS_RIGHT] / 2.0, border_width[GTK_CSS_BOTTOM] / 2.0, border_width[GTK_CSS_LEFT] / 2.0); if (!different_colors && !different_borders && hidden_side == 0) { double length = 0; /* FAST PATH: * Mostly expected to trigger for focus rectangles */ for (i = 0; i < 4; i++) { length += _gtk_rounded_box_guess_length (&stroke_box, i); } gsk_rounded_rect_path (&stroke_box, cr); gdk_cairo_set_source_rgba (cr, &colors[0]); set_stroke_style (cr, border_width[0], stroke_style, length); cairo_stroke (cr); } else { GskRoundedRect padding_box; padding_box = *border_box; gsk_rounded_rect_shrink (&padding_box, border_width[GTK_CSS_TOP], border_width[GTK_CSS_RIGHT], border_width[GTK_CSS_BOTTOM], border_width[GTK_CSS_LEFT]); for (i = 0; i < 4; i++) { if (hidden_side & (1 << i)) continue; if (border_width[i] == 0) continue; cairo_save (cr); if (i == 0) _gtk_rounded_box_path_top (border_box, &padding_box, cr); else if (i == 1) _gtk_rounded_box_path_right (border_box, &padding_box, cr); else if (i == 2) _gtk_rounded_box_path_bottom (border_box, &padding_box, cr); else if (i == 3) _gtk_rounded_box_path_left (border_box, &padding_box, cr); cairo_clip (cr); _gtk_rounded_box_path_side (&stroke_box, cr, i); gdk_cairo_set_source_rgba (cr, &colors[i]); set_stroke_style (cr, border_width[i], stroke_style, _gtk_rounded_box_guess_length (&stroke_box, i)); cairo_stroke (cr); cairo_restore (cr); } } } static void snapshot_frame_stroke (GtkSnapshot *snapshot, const GskRoundedRect *outline, const float border_width[4], GdkRGBA colors[4], guint hidden_side, GtkBorderStyle stroke_style) { double double_width[4] = { border_width[0], border_width[1], border_width[2], border_width[3] }; cairo_t *cr; cr = gtk_snapshot_append_cairo (snapshot, &outline->bounds); render_frame_stroke (cr, outline, double_width, colors, hidden_side, stroke_style); cairo_destroy (cr); } static void color_shade (const GdkRGBA *color, double factor, GdkRGBA *color_return) { GtkHSLA hsla; _gtk_hsla_init_from_rgba (&hsla, color); _gtk_hsla_shade (&hsla, &hsla, factor); _gdk_rgba_init_from_hsla (color_return, &hsla); } static void snapshot_border (GtkSnapshot *snapshot, const GskRoundedRect *border_box, const float border_width[4], GdkRGBA colors[4], GtkBorderStyle border_style[4]) { guint hidden_side = 0; guint i, j; for (i = 0; i < 4; i++) { if (hidden_side & (1 << i)) continue; /* NB: code below divides by this value */ /* a border smaller than this will not noticeably modify * pixels on screen, and since we don't compare with 0, * we'll use this value */ if (border_width[i] < 1.0 / 1024) continue; switch (border_style[i]) { case GTK_BORDER_STYLE_NONE: case GTK_BORDER_STYLE_HIDDEN: case GTK_BORDER_STYLE_SOLID: break; case GTK_BORDER_STYLE_INSET: if (i == 1 || i == 2) color_shade (&colors[i], 1.8, &colors[i]); break; case GTK_BORDER_STYLE_OUTSET: if (i == 0 || i == 3) color_shade (&colors[i], 1.8, &colors[i]); break; case GTK_BORDER_STYLE_DOTTED: case GTK_BORDER_STYLE_DASHED: { guint dont_draw = hidden_side; for (j = 0; j < 4; j++) { if (border_style[j] == border_style[i]) hidden_side |= (1 << j); else dont_draw |= (1 << j); } snapshot_frame_stroke (snapshot, border_box, border_width, colors, dont_draw, border_style[i]); } break; case GTK_BORDER_STYLE_DOUBLE: { GskRoundedRect other_box; float other_border[4]; guint dont_draw = hidden_side; for (j = 0; j < 4; j++) { if (border_style[j] == GTK_BORDER_STYLE_DOUBLE) hidden_side |= (1 << j); else dont_draw |= (1 << j); other_border[j] = border_width[j] / 3; } snapshot_frame_fill (snapshot, border_box, other_border, colors, dont_draw); other_box = *border_box; gsk_rounded_rect_shrink (&other_box, 2 * other_border[GTK_CSS_TOP], 2 * other_border[GTK_CSS_RIGHT], 2 * other_border[GTK_CSS_BOTTOM], 2 * other_border[GTK_CSS_LEFT]); snapshot_frame_fill (snapshot, &other_box, other_border, colors, dont_draw); } break; case GTK_BORDER_STYLE_GROOVE: case GTK_BORDER_STYLE_RIDGE: { GskRoundedRect other_box; GdkRGBA other_colors[4]; guint dont_draw = hidden_side; float other_border[4]; for (j = 0; j < 4; j++) { other_colors[j] = colors[j]; if ((j == 0 || j == 3) ^ (border_style[j] == GTK_BORDER_STYLE_RIDGE)) color_shade (&other_colors[j], 1.8, &other_colors[j]); else color_shade (&colors[j], 1.8, &colors[j]); if (border_style[j] == GTK_BORDER_STYLE_GROOVE || border_style[j] == GTK_BORDER_STYLE_RIDGE) hidden_side |= (1 << j); else dont_draw |= (1 << j); other_border[j] = border_width[j] / 2; } snapshot_frame_fill (snapshot, border_box, other_border, colors, dont_draw); other_box = *border_box; gsk_rounded_rect_shrink (&other_box, other_border[GTK_CSS_TOP], other_border[GTK_CSS_RIGHT], other_border[GTK_CSS_BOTTOM], other_border[GTK_CSS_LEFT]); snapshot_frame_fill (snapshot, &other_box, other_border, other_colors, dont_draw); } break; default: g_assert_not_reached (); break; } } snapshot_frame_fill (snapshot, border_box, border_width, colors, hidden_side); } void gtk_css_style_snapshot_border (GtkCssBoxes *boxes, GtkSnapshot *snapshot) { const GtkCssBorderValues *border = boxes->style->border; GtkBorderImage border_image; float border_width[4]; if (border->base.type == GTK_CSS_BORDER_INITIAL_VALUES) return; if (gtk_border_image_init (&border_image, boxes->style)) { cairo_t *cr; const graphene_rect_t *bounds; border_width[0] = _gtk_css_number_value_get (border->border_top_width, 100); border_width[1] = _gtk_css_number_value_get (border->border_right_width, 100); border_width[2] = _gtk_css_number_value_get (border->border_bottom_width, 100); border_width[3] = _gtk_css_number_value_get (border->border_left_width, 100); bounds = gtk_css_boxes_get_border_rect (boxes); gtk_snapshot_push_debug (snapshot, "CSS border image"); cr = gtk_snapshot_append_cairo (snapshot, bounds); gtk_border_image_render (&border_image, border_width, cr, bounds); cairo_destroy (cr); gtk_snapshot_pop (snapshot); } else { GtkBorderStyle border_style[4]; GdkRGBA colors[4]; graphene_simd4f_t alpha_test_vector; /* Optimize the most common case of "This widget has no border" */ if (graphene_rect_equal (gtk_css_boxes_get_border_rect (boxes), gtk_css_boxes_get_padding_rect (boxes))) return; colors[0] = *gtk_css_color_value_get_rgba (border->border_top_color ? border->border_top_color : boxes->style->core->color); colors[1] = *gtk_css_color_value_get_rgba (border->border_right_color ? border->border_right_color : boxes->style->core->color); colors[2] = *gtk_css_color_value_get_rgba (border->border_bottom_color ? border->border_bottom_color : boxes->style->core->color); colors[3] = *gtk_css_color_value_get_rgba (border->border_left_color ? border->border_left_color : boxes->style->core->color); alpha_test_vector = graphene_simd4f_init (colors[0].alpha, colors[1].alpha, colors[2].alpha, colors[3].alpha); if (graphene_simd4f_is_zero4 (alpha_test_vector)) return; border_style[0] = _gtk_css_border_style_value_get (border->border_top_style); border_style[1] = _gtk_css_border_style_value_get (border->border_right_style); border_style[2] = _gtk_css_border_style_value_get (border->border_bottom_style); border_style[3] = _gtk_css_border_style_value_get (border->border_left_style); border_width[0] = _gtk_css_number_value_get (border->border_top_width, 100); border_width[1] = _gtk_css_number_value_get (border->border_right_width, 100); border_width[2] = _gtk_css_number_value_get (border->border_bottom_width, 100); border_width[3] = _gtk_css_number_value_get (border->border_left_width, 100); gtk_snapshot_push_debug (snapshot, "CSS border"); if (border_style[0] <= GTK_BORDER_STYLE_SOLID && border_style[1] <= GTK_BORDER_STYLE_SOLID && border_style[2] <= GTK_BORDER_STYLE_SOLID && border_style[3] <= GTK_BORDER_STYLE_SOLID) { /* The most common case of a solid border */ gtk_snapshot_append_border (snapshot, gtk_css_boxes_get_border_box (boxes), border_width, colors); } else { snapshot_border (snapshot, gtk_css_boxes_get_border_box (boxes), border_width, colors, border_style); } gtk_snapshot_pop (snapshot); } } void gtk_css_style_snapshot_outline (GtkCssBoxes *boxes, GtkSnapshot *snapshot) { GtkCssOutlineValues *outline = boxes->style->outline; GtkBorderStyle border_style[4]; float border_width[4]; GdkRGBA colors[4]; border_style[0] = _gtk_css_border_style_value_get (outline->outline_style); if (border_style[0] != GTK_BORDER_STYLE_NONE) { const GdkRGBA *color = gtk_css_color_value_get_rgba (outline->outline_color ? outline->outline_color : boxes->style->core->color); if (gdk_rgba_is_clear (color)) return; border_style[1] = border_style[2] = border_style[3] = border_style[0]; border_width[0] = _gtk_css_number_value_get (outline->outline_width, 100); border_width[3] = border_width[2] = border_width[1] = border_width[0]; colors[0] = colors[1] = colors[2] = colors[3] = *color; snapshot_border (snapshot, gtk_css_boxes_get_outline_box (boxes), border_width, colors, border_style); } }