487 lines
15 KiB
C
487 lines
15 KiB
C
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/*
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* Copyright (C) 2017 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "gsk/gsk.h"
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#include "gsk/gskrendernodeprivate.h"
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#include "gskpangoprivate.h"
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#include "gtksnapshotprivate.h"
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#include "gtktextlayoutprivate.h"
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#include "gtktextviewprivate.h"
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#include "gtkwidgetprivate.h"
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#include "gtkcsscolorvalueprivate.h"
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#include <math.h>
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#include <pango/pango.h>
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#include <cairo.h>
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G_DEFINE_TYPE (GskPangoRenderer, gsk_pango_renderer, PANGO_TYPE_RENDERER)
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void
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gsk_pango_renderer_set_state (GskPangoRenderer *crenderer,
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GskPangoRendererState state)
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{
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g_return_if_fail (GSK_IS_PANGO_RENDERER (crenderer));
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crenderer->state = state;
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}
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void
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gsk_pango_renderer_set_shape_handler (GskPangoRenderer *crenderer,
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GskPangoShapeHandler handler)
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{
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g_return_if_fail (GSK_IS_PANGO_RENDERER (crenderer));
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crenderer->shape_handler = handler;
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}
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static void
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get_color (GskPangoRenderer *crenderer,
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PangoRenderPart part,
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GdkRGBA *rgba)
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{
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const PangoColor *color = pango_renderer_get_color ((PangoRenderer *) (crenderer), part);
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const guint16 a = pango_renderer_get_alpha ((PangoRenderer *) (crenderer), part);
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if (color)
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{
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rgba->red = color->red / 65535.;
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rgba->green = color->green / 65535.;
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rgba->blue = color->blue / 65535.;
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rgba->alpha = a ? a / 65535. : crenderer->fg_color->alpha;
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}
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else
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{
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*rgba = *crenderer->fg_color;
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if (a)
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rgba->alpha = a / 65535.;
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}
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}
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static void
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set_color (GskPangoRenderer *crenderer,
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PangoRenderPart part,
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cairo_t *cr)
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{
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GdkRGBA rgba = { 0, 0, 0, 1 };
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get_color (crenderer, part, &rgba);
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gdk_cairo_set_source_rgba (cr, &rgba);
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}
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static void
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gsk_pango_renderer_draw_glyph_item (PangoRenderer *renderer,
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const char *text,
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PangoGlyphItem *glyph_item,
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int x,
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int y)
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{
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GskPangoRenderer *crenderer = (GskPangoRenderer *) (renderer);
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GdkRGBA color;
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get_color (crenderer, PANGO_RENDER_PART_FOREGROUND, &color);
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gtk_snapshot_append_text (crenderer->snapshot,
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glyph_item->item->analysis.font,
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glyph_item->glyphs,
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&color,
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(float) x / PANGO_SCALE,
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(float) y / PANGO_SCALE);
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}
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static void
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gsk_pango_renderer_draw_rectangle (PangoRenderer *renderer,
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PangoRenderPart part,
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int x,
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int y,
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int width,
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int height)
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{
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GskPangoRenderer *crenderer = (GskPangoRenderer *) (renderer);
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GdkRGBA rgba;
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get_color (crenderer, part, &rgba);
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gtk_snapshot_append_color (crenderer->snapshot,
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&rgba,
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&GRAPHENE_RECT_INIT ((double)x / PANGO_SCALE,
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(double)y / PANGO_SCALE,
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(double)width / PANGO_SCALE,
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(double)height / PANGO_SCALE));
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}
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static void
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gsk_pango_renderer_draw_trapezoid (PangoRenderer *renderer,
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PangoRenderPart part,
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double y1_,
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double x11,
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double x21,
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double y2,
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double x12,
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double x22)
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{
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GskPangoRenderer *crenderer = (GskPangoRenderer *) (renderer);
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PangoLayout *layout;
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PangoRectangle ink_rect;
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cairo_t *cr;
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double x, y;
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layout = pango_renderer_get_layout (renderer);
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if (!layout)
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return;
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pango_layout_get_pixel_extents (layout, &ink_rect, NULL);
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cr = gtk_snapshot_append_cairo (crenderer->snapshot,
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&GRAPHENE_RECT_INIT (ink_rect.x, ink_rect.y,
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ink_rect.width, ink_rect.height));
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set_color (crenderer, part, cr);
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x = y = 0;
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cairo_user_to_device_distance (cr, &x, &y);
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cairo_identity_matrix (cr);
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cairo_translate (cr, x, y);
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cairo_move_to (cr, x11, y1_);
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cairo_line_to (cr, x21, y1_);
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cairo_line_to (cr, x22, y2);
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cairo_line_to (cr, x12, y2);
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cairo_close_path (cr);
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cairo_fill (cr);
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cairo_destroy (cr);
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}
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static void
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gsk_pango_renderer_draw_error_underline (PangoRenderer *renderer,
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int x,
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int y,
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int width,
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int height)
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{
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GskPangoRenderer *crenderer = (GskPangoRenderer *) (renderer);
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double xx, yy, ww, hh;
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GdkRGBA rgba;
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GskRoundedRect dot;
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xx = (double)x / PANGO_SCALE;
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yy = (double)y / PANGO_SCALE;
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ww = (double)width / PANGO_SCALE;
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hh = (double)height / PANGO_SCALE;
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get_color (crenderer, PANGO_RENDER_PART_UNDERLINE, &rgba);
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gtk_snapshot_push_repeat (crenderer->snapshot,
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&GRAPHENE_RECT_INIT (xx, yy, ww, hh),
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NULL);
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gsk_rounded_rect_init_from_rect (&dot,
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&GRAPHENE_RECT_INIT (xx, yy, hh, hh),
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hh / 2);
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gtk_snapshot_push_rounded_clip (crenderer->snapshot, &dot);
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gtk_snapshot_append_color (crenderer->snapshot, &rgba, &dot.bounds);
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gtk_snapshot_pop (crenderer->snapshot);
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gtk_snapshot_append_color (crenderer->snapshot,
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&(GdkRGBA) { 0.f, 0.f, 0.f, 0.f },
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&GRAPHENE_RECT_INIT (xx, yy, 1.5 * hh, hh));
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gtk_snapshot_pop (crenderer->snapshot);
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}
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static void
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gsk_pango_renderer_draw_shape (PangoRenderer *renderer,
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PangoAttrShape *attr,
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int x,
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int y)
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{
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GskPangoRenderer *crenderer = (GskPangoRenderer *) (renderer);
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PangoLayout *layout;
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PangoCairoShapeRendererFunc shape_renderer;
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gpointer shape_renderer_data;
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double base_x = (double)x / PANGO_SCALE;
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double base_y = (double)y / PANGO_SCALE;
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gboolean handled = FALSE;
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if (crenderer->shape_handler)
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{
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double shape_x = base_x;
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double shape_y = (double) (y + attr->logical_rect.y) / PANGO_SCALE;
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if (shape_x != 0 || shape_y != 0)
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{
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gtk_snapshot_save (crenderer->snapshot);
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gtk_snapshot_translate (crenderer->snapshot, &GRAPHENE_POINT_INIT (shape_x, shape_y));
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}
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handled = crenderer->shape_handler (attr,
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crenderer->snapshot,
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(double)attr->logical_rect.width / PANGO_SCALE,
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(double)attr->logical_rect.height / PANGO_SCALE);
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if (shape_x != 0 || shape_y != 0)
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gtk_snapshot_restore (crenderer->snapshot);
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}
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if (!handled)
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{
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cairo_t *cr;
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PangoRectangle ink_rect;
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layout = pango_renderer_get_layout (renderer);
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if (!layout)
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return;
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pango_layout_get_pixel_extents (layout, &ink_rect, NULL);
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cr = gtk_snapshot_append_cairo (crenderer->snapshot,
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&GRAPHENE_RECT_INIT (ink_rect.x, ink_rect.y,
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ink_rect.width, ink_rect.height));
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shape_renderer = pango_cairo_context_get_shape_renderer (pango_layout_get_context (layout),
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&shape_renderer_data);
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if (!shape_renderer)
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{
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cairo_destroy (cr);
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return;
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}
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set_color (crenderer, PANGO_RENDER_PART_FOREGROUND, cr);
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cairo_move_to (cr, base_x, base_y);
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shape_renderer (cr, attr, FALSE, shape_renderer_data);
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cairo_destroy (cr);
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}
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}
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static void
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text_renderer_set_rgba (GskPangoRenderer *crenderer,
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PangoRenderPart part,
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const GdkRGBA *rgba)
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{
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PangoRenderer *renderer = PANGO_RENDERER (crenderer);
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PangoColor color = { 0, };
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guint16 alpha;
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if (rgba)
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{
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color.red = (guint16)(rgba->red * 65535);
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color.green = (guint16)(rgba->green * 65535);
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color.blue = (guint16)(rgba->blue * 65535);
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alpha = (guint16)(rgba->alpha * 65535);
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pango_renderer_set_color (renderer, part, &color);
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pango_renderer_set_alpha (renderer, part, alpha);
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}
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else
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{
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pango_renderer_set_color (renderer, part, NULL);
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pango_renderer_set_alpha (renderer, part, 0);
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}
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}
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static GtkTextAppearance *
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get_item_appearance (PangoItem *item)
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{
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GSList *tmp_list = item->analysis.extra_attrs;
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while (tmp_list)
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{
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PangoAttribute *attr = tmp_list->data;
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if (attr->klass->type == gtk_text_attr_appearance_type)
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return &((GtkTextAttrAppearance *)attr)->appearance;
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tmp_list = tmp_list->next;
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}
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return NULL;
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}
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static void
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gsk_pango_renderer_prepare_run (PangoRenderer *renderer,
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PangoLayoutRun *run)
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{
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GskPangoRenderer *crenderer = GSK_PANGO_RENDERER (renderer);
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const GdkRGBA *bg_rgba = NULL;
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const GdkRGBA *fg_rgba = NULL;
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GtkTextAppearance *appearance;
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PANGO_RENDERER_CLASS (gsk_pango_renderer_parent_class)->prepare_run (renderer, run);
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appearance = get_item_appearance (run->item);
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if (appearance == NULL)
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return;
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if (appearance->draw_bg && crenderer->state == GSK_PANGO_RENDERER_NORMAL)
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bg_rgba = appearance->bg_rgba;
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else
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bg_rgba = NULL;
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text_renderer_set_rgba (crenderer, PANGO_RENDER_PART_BACKGROUND, bg_rgba);
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if (crenderer->state == GSK_PANGO_RENDERER_SELECTED &&
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GTK_IS_TEXT_VIEW (crenderer->widget))
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{
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GtkCssNode *node;
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GtkCssValue *value;
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node = gtk_text_view_get_selection_node ((GtkTextView *)crenderer->widget);
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value = gtk_css_node_get_style (node)->core->color;
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fg_rgba = gtk_css_color_value_get_rgba (value);
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}
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else if (crenderer->state == GSK_PANGO_RENDERER_CURSOR && gtk_widget_has_focus (crenderer->widget))
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{
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GtkCssNode *node;
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GtkCssValue *value;
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node = gtk_widget_get_css_node (crenderer->widget);
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value = gtk_css_node_get_style (node)->background->background_color;
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fg_rgba = gtk_css_color_value_get_rgba (value);
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}
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else
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fg_rgba = appearance->fg_rgba;
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text_renderer_set_rgba (crenderer, PANGO_RENDER_PART_FOREGROUND, fg_rgba);
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if (appearance->strikethrough_rgba)
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text_renderer_set_rgba (crenderer, PANGO_RENDER_PART_STRIKETHROUGH, appearance->strikethrough_rgba);
|
||
|
|
else
|
||
|
|
text_renderer_set_rgba (crenderer, PANGO_RENDER_PART_STRIKETHROUGH, fg_rgba);
|
||
|
|
|
||
|
|
if (appearance->underline_rgba)
|
||
|
|
text_renderer_set_rgba (crenderer, PANGO_RENDER_PART_UNDERLINE, appearance->underline_rgba);
|
||
|
|
else if (appearance->underline == PANGO_UNDERLINE_ERROR)
|
||
|
|
{
|
||
|
|
if (!crenderer->error_color)
|
||
|
|
{
|
||
|
|
static const GdkRGBA red = { 1, 0, 0, 1 };
|
||
|
|
crenderer->error_color = gdk_rgba_copy (&red);
|
||
|
|
}
|
||
|
|
|
||
|
|
text_renderer_set_rgba (crenderer, PANGO_RENDER_PART_UNDERLINE, crenderer->error_color);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
text_renderer_set_rgba (crenderer, PANGO_RENDER_PART_UNDERLINE, fg_rgba);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gsk_pango_renderer_init (GskPangoRenderer *renderer G_GNUC_UNUSED)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gsk_pango_renderer_class_init (GskPangoRendererClass *klass)
|
||
|
|
{
|
||
|
|
PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
|
||
|
|
|
||
|
|
renderer_class->draw_glyph_item = gsk_pango_renderer_draw_glyph_item;
|
||
|
|
renderer_class->draw_rectangle = gsk_pango_renderer_draw_rectangle;
|
||
|
|
renderer_class->draw_trapezoid = gsk_pango_renderer_draw_trapezoid;
|
||
|
|
renderer_class->draw_error_underline = gsk_pango_renderer_draw_error_underline;
|
||
|
|
renderer_class->draw_shape = gsk_pango_renderer_draw_shape;
|
||
|
|
renderer_class->prepare_run = gsk_pango_renderer_prepare_run;
|
||
|
|
}
|
||
|
|
|
||
|
|
static GskPangoRenderer *cached_renderer = NULL; /* MT-safe */
|
||
|
|
G_LOCK_DEFINE_STATIC (cached_renderer);
|
||
|
|
|
||
|
|
GskPangoRenderer *
|
||
|
|
gsk_pango_renderer_acquire (void)
|
||
|
|
{
|
||
|
|
GskPangoRenderer *renderer;
|
||
|
|
|
||
|
|
if (G_LIKELY (G_TRYLOCK (cached_renderer)))
|
||
|
|
{
|
||
|
|
if (G_UNLIKELY (!cached_renderer))
|
||
|
|
{
|
||
|
|
cached_renderer = g_object_new (GSK_TYPE_PANGO_RENDERER, NULL);
|
||
|
|
cached_renderer->is_cached_renderer = TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
renderer = cached_renderer;
|
||
|
|
|
||
|
|
/* Reset to standard state */
|
||
|
|
renderer->state = GSK_PANGO_RENDERER_NORMAL;
|
||
|
|
renderer->shape_handler = NULL;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
renderer = g_object_new (GSK_TYPE_PANGO_RENDERER, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
return renderer;
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
gsk_pango_renderer_release (GskPangoRenderer *renderer)
|
||
|
|
{
|
||
|
|
if (G_LIKELY (renderer->is_cached_renderer))
|
||
|
|
{
|
||
|
|
renderer->widget = NULL;
|
||
|
|
renderer->snapshot = NULL;
|
||
|
|
|
||
|
|
if (renderer->error_color)
|
||
|
|
{
|
||
|
|
gdk_rgba_free (renderer->error_color);
|
||
|
|
renderer->error_color = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
G_UNLOCK (cached_renderer);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
g_object_unref (renderer);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* gtk_snapshot_append_layout:
|
||
|
|
* @snapshot: a `GtkSnapshot`
|
||
|
|
* @layout: the `PangoLayout` to render
|
||
|
|
* @color: the foreground color to render the layout in
|
||
|
|
*
|
||
|
|
* Creates render nodes for rendering @layout in the given foregound @color
|
||
|
|
* and appends them to the current node of @snapshot without changing the
|
||
|
|
* current node. The current theme's foreground color for a widget can be
|
||
|
|
* obtained with [method@Gtk.Widget.get_color].
|
||
|
|
*
|
||
|
|
* Note that if the layout does not produce any visible output, then nodes
|
||
|
|
* may not be added to the @snapshot.
|
||
|
|
**/
|
||
|
|
void
|
||
|
|
gtk_snapshot_append_layout (GtkSnapshot *snapshot,
|
||
|
|
PangoLayout *layout,
|
||
|
|
const GdkRGBA *color)
|
||
|
|
{
|
||
|
|
GskPangoRenderer *crenderer;
|
||
|
|
|
||
|
|
g_return_if_fail (snapshot != NULL);
|
||
|
|
g_return_if_fail (PANGO_IS_LAYOUT (layout));
|
||
|
|
|
||
|
|
crenderer = gsk_pango_renderer_acquire ();
|
||
|
|
|
||
|
|
crenderer->snapshot = snapshot;
|
||
|
|
crenderer->fg_color = color;
|
||
|
|
|
||
|
|
pango_renderer_draw_layout (PANGO_RENDERER (crenderer), layout, 0, 0);
|
||
|
|
|
||
|
|
gsk_pango_renderer_release (crenderer);
|
||
|
|
}
|