/* GTK - The GIMP Toolkit * Copyright (C) 2010 Carlos Garnacho * * 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 . */ #include "config.h" #include "gtkrender.h" #include #include "gtkcsscornervalueprivate.h" #include "gtkcssimagebuiltinprivate.h" #include "gtkcssimagevalueprivate.h" #include "gtkcssnumbervalueprivate.h" #include "gtkcssrgbavalueprivate.h" #include "gtkcssshadowsvalueprivate.h" #include "gtkcsstransformvalueprivate.h" #include "gtkhslaprivate.h" #include "gtkrenderbackgroundprivate.h" #include "gtkrenderborderprivate.h" #include "gtkrendericonprivate.h" #include "gtkstylecontextprivate.h" #include "gsk/gskroundedrectprivate.h" #include #include "fallback-c89.c" static void gtk_do_render_check (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStateFlags state; GtkCssImageBuiltinType image_type; state = gtk_style_context_get_state (context); if (state & GTK_STATE_FLAG_INCONSISTENT) image_type = GTK_CSS_IMAGE_BUILTIN_CHECK_INCONSISTENT; else if (state & GTK_STATE_FLAG_CHECKED) image_type = GTK_CSS_IMAGE_BUILTIN_CHECK; else image_type = GTK_CSS_IMAGE_BUILTIN_NONE; gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, image_type); } /** * gtk_render_check: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders a checkmark (as in a #GtkCheckButton). * * The %GTK_STATE_FLAG_CHECKED state determines whether the check is * on or off, and %GTK_STATE_FLAG_INCONSISTENT determines whether it * should be marked as undefined. * * Typical checkmark rendering: * * ![](checks.png) **/ void gtk_render_check (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; gtk_do_render_check (context, cr, x, y, width, height); } static void gtk_do_render_option (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStateFlags state; GtkCssImageBuiltinType image_type; state = gtk_style_context_get_state (context); if (state & GTK_STATE_FLAG_INCONSISTENT) image_type = GTK_CSS_IMAGE_BUILTIN_OPTION_INCONSISTENT; else if (state & GTK_STATE_FLAG_CHECKED) image_type = GTK_CSS_IMAGE_BUILTIN_OPTION; else image_type = GTK_CSS_IMAGE_BUILTIN_NONE; gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, image_type); } /** * gtk_render_option: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders an option mark (as in a #GtkRadioButton), the %GTK_STATE_FLAG_CHECKED * state will determine whether the option is on or off, and * %GTK_STATE_FLAG_INCONSISTENT whether it should be marked as undefined. * * Typical option mark rendering: * * ![](options.png) **/ void gtk_render_option (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; gtk_do_render_option (context, cr, x, y, width, height); } static void gtk_do_render_arrow (GtkStyleContext *context, cairo_t *cr, gdouble angle, gdouble x, gdouble y, gdouble size) { GtkCssImageBuiltinType image_type; /* map [0, 2 * pi) to [0, 4) */ angle = round (2 * angle / G_PI); switch (((int) angle) & 3) { case 0: image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_UP; break; case 1: image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_RIGHT; break; case 2: image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_DOWN; break; case 3: image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_LEFT; break; default: g_assert_not_reached (); image_type = GTK_CSS_IMAGE_BUILTIN_ARROW_UP; break; } gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, size, size, image_type); } /** * gtk_render_arrow: * @context: a #GtkStyleContext * @cr: a #cairo_t * @angle: arrow angle from 0 to 2 * %G_PI, being 0 the arrow pointing to the north * @x: X origin of the render area * @y: Y origin of the render area * @size: square side for render area * * Renders an arrow pointing to @angle. * * Typical arrow rendering at 0, 1⁄2 π;, π; and 3⁄2 π: * * ![](arrows.png) **/ void gtk_render_arrow (GtkStyleContext *context, cairo_t *cr, gdouble angle, gdouble x, gdouble y, gdouble size) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (size <= 0) return; gtk_do_render_arrow (context, cr, angle, x, y, size); } /** * gtk_render_background: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders the background of an element. * * Typical background rendering, showing the effect of * `background-image`, `border-width` and `border-radius`: * * ![](background.png) **/ void gtk_render_background (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; gtk_css_style_render_background (gtk_style_context_lookup_style (context), cr, x, y, width, height); } /** * gtk_render_background_get_clip: * @context: a #GtkStyleContext * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * @out_clip: (out): return location for the clip * * Returns the area that will be affected (i.e. drawn to) when * calling gtk_render_background() for the given @context and * rectangle. */ void gtk_render_background_get_clip (GtkStyleContext *context, gdouble x, gdouble y, gdouble width, gdouble height, GdkRectangle *out_clip) { GtkBorder shadow; _gtk_css_shadows_value_get_extents (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BOX_SHADOW), &shadow); out_clip->x = floor (x) - shadow.left; out_clip->y = floor (y) - shadow.top; out_clip->width = ceil (width) + shadow.left + shadow.right; out_clip->height = ceil (height) + shadow.top + shadow.bottom; } /** * gtk_render_frame: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders a frame around the rectangle defined by @x, @y, @width, @height. * * Examples of frame rendering, showing the effect of `border-image`, * `border-color`, `border-width`, `border-radius` and junctions: * * ![](frames.png) **/ void gtk_render_frame (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; gtk_css_style_render_border (gtk_style_context_lookup_style (context), cr, x, y, width, height); } static void gtk_do_render_expander (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkCssImageBuiltinType image_type; GtkStateFlags state; state = gtk_style_context_get_state (context); if (gtk_style_context_has_class (context, "horizontal")) { if (state & GTK_STATE_FLAG_DIR_RTL) image_type = (state & GTK_STATE_FLAG_CHECKED) ? GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_RIGHT_EXPANDED : GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_RIGHT; else image_type = (state & GTK_STATE_FLAG_CHECKED) ? GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_LEFT_EXPANDED : GTK_CSS_IMAGE_BUILTIN_EXPANDER_HORIZONTAL_LEFT; } else { if (state & GTK_STATE_FLAG_DIR_RTL) image_type = (state & GTK_STATE_FLAG_CHECKED) ? GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_RIGHT_EXPANDED : GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_RIGHT; else image_type = (state & GTK_STATE_FLAG_CHECKED) ? GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_LEFT_EXPANDED : GTK_CSS_IMAGE_BUILTIN_EXPANDER_VERTICAL_LEFT; } gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, image_type); } /** * gtk_render_expander: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders an expander (as used in #GtkTreeView and #GtkExpander) in the area * defined by @x, @y, @width, @height. The state %GTK_STATE_FLAG_CHECKED * determines whether the expander is collapsed or expanded. * * Typical expander rendering: * * ![](expanders.png) **/ void gtk_render_expander (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; gtk_do_render_expander (context, cr, x, y, width, height); } /** * gtk_render_focus: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders a focus indicator on the rectangle determined by @x, @y, @width, @height. * * Typical focus rendering: * * ![](focus.png) **/ void gtk_render_focus (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; gtk_css_style_render_outline (gtk_style_context_lookup_style (context), cr, x, y, width, height); } static void prepare_context_for_layout (cairo_t *cr, gdouble x, gdouble y, PangoLayout *layout) { const PangoMatrix *matrix; matrix = pango_context_get_matrix (pango_layout_get_context (layout)); cairo_move_to (cr, x, y); if (matrix) { cairo_matrix_t cairo_matrix; cairo_matrix_init (&cairo_matrix, matrix->xx, matrix->yx, matrix->xy, matrix->yy, matrix->x0, matrix->y0); cairo_transform (cr, &cairo_matrix); } } static void gtk_do_render_layout (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, PangoLayout *layout) { const GdkRGBA *fg_color; cairo_save (cr); fg_color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR)); prepare_context_for_layout (cr, x, y, layout); _gtk_css_shadows_value_paint_layout (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_TEXT_SHADOW), cr, layout); gdk_cairo_set_source_rgba (cr, fg_color); pango_cairo_show_layout (cr, layout); cairo_restore (cr); } /** * gtk_render_layout: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin * @y: Y origin * @layout: the #PangoLayout to render * * Renders @layout on the coordinates @x, @y **/ void gtk_render_layout (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, PangoLayout *layout) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (PANGO_IS_LAYOUT (layout)); g_return_if_fail (cr != NULL); gtk_do_render_layout (context, cr, x, y, layout); } static void gtk_do_render_line (GtkStyleContext *context, cairo_t *cr, gdouble x0, gdouble y0, gdouble x1, gdouble y1) { const GdkRGBA *color; cairo_save (cr); color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR)); cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); cairo_set_line_width (cr, 1); cairo_move_to (cr, x0 + 0.5, y0 + 0.5); cairo_line_to (cr, x1 + 0.5, y1 + 0.5); gdk_cairo_set_source_rgba (cr, color); cairo_stroke (cr); cairo_restore (cr); } /** * gtk_render_line: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x0: X coordinate for the origin of the line * @y0: Y coordinate for the origin of the line * @x1: X coordinate for the end of the line * @y1: Y coordinate for the end of the line * * Renders a line from (x0, y0) to (x1, y1). **/ void gtk_render_line (GtkStyleContext *context, cairo_t *cr, gdouble x0, gdouble y0, gdouble x1, gdouble y1) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); gtk_do_render_line (context, cr, x0, y0, x1, y1); } static void gtk_css_style_render_frame_gap (GtkCssStyle *style, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkPositionType gap_side, gdouble xy0_gap, gdouble xy1_gap) { gint border_width; gdouble x0, y0, x1, y1, xc = 0.0, yc = 0.0, wc = 0.0, hc = 0.0; GtkBorder border; border.top = _gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_TOP_WIDTH), 100); border.right = _gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_RIGHT_WIDTH), 100); border.bottom = _gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_BOTTOM_WIDTH), 100); border.left = _gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_LEFT_WIDTH), 100); border_width = MIN (MIN (border.top, border.bottom), MIN (border.left, border.right)); cairo_save (cr); switch (gap_side) { case GTK_POS_TOP: xc = x + xy0_gap + border_width; yc = y; wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0); hc = border_width; break; case GTK_POS_BOTTOM: xc = x + xy0_gap + border_width; yc = y + height - border_width; wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0); hc = border_width; break; case GTK_POS_LEFT: xc = x; yc = y + xy0_gap + border_width; wc = border_width; hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0); break; case GTK_POS_RIGHT: xc = x + width - border_width; yc = y + xy0_gap + border_width; wc = border_width; hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0); break; default: g_assert_not_reached (); break; } cairo_clip_extents (cr, &x0, &y0, &x1, &y1); cairo_rectangle (cr, x0, y0, x1 - x0, yc - y0); cairo_rectangle (cr, x0, yc, xc - x0, hc); cairo_rectangle (cr, xc + wc, yc, x1 - (xc + wc), hc); cairo_rectangle (cr, x0, yc + hc, x1 - x0, y1 - (yc + hc)); cairo_clip (cr); gtk_css_style_render_border (style, cr, x, y, width, height); cairo_restore (cr); } /** * gtk_render_frame_gap: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * @gap_side: side where the gap is * @xy0_gap: initial coordinate (X or Y depending on @gap_side) for the gap * @xy1_gap: end coordinate (X or Y depending on @gap_side) for the gap * * Renders a frame around the rectangle defined by (@x, @y, @width, @height), * leaving a gap on one side. @xy0_gap and @xy1_gap will mean X coordinates * for %GTK_POS_TOP and %GTK_POS_BOTTOM gap sides, and Y coordinates for * %GTK_POS_LEFT and %GTK_POS_RIGHT. * * Typical rendering of a frame with a gap: * * ![](frame-gap.png) **/ void gtk_render_frame_gap (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkPositionType gap_side, gdouble xy0_gap, gdouble xy1_gap) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); g_return_if_fail (xy0_gap <= xy1_gap); g_return_if_fail (xy0_gap >= 0); if (width <= 0 || height <= 0) return; if (gap_side == GTK_POS_LEFT || gap_side == GTK_POS_RIGHT) g_return_if_fail (xy1_gap <= height); else g_return_if_fail (xy1_gap <= width); gtk_css_style_render_frame_gap (gtk_style_context_lookup_style (context), cr, x, y, width, height, gap_side, xy0_gap, xy1_gap); } static void gtk_do_render_handle (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkCssImageBuiltinType type; gtk_render_background (context, cr, x, y, width, height); gtk_render_frame (context, cr, x, y, width, height); if (gtk_style_context_has_class (context, GTK_STYLE_CLASS_PANE_SEPARATOR)) { type = GTK_CSS_IMAGE_BUILTIN_PANE_SEPARATOR; } else { type = GTK_CSS_IMAGE_BUILTIN_HANDLE; } gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, type); } /** * gtk_render_handle: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders a handle (as in #GtkPaned and * #GtkWindow’s resize grip), in the rectangle * determined by @x, @y, @width, @height. * * Handles rendered for the paned and grip classes: * * ![](handles.png) **/ void gtk_render_handle (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; gtk_do_render_handle (context, cr, x, y, width, height); } /** * gtk_render_activity: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders an activity indicator (such as in #GtkSpinner). * The state %GTK_STATE_FLAG_CHECKED determines whether there is * activity going on. **/ void gtk_render_activity (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; gtk_css_style_render_icon (gtk_style_context_lookup_style (context), cr, x, y, width, height, GTK_CSS_IMAGE_BUILTIN_SPINNER); } /** * gtk_render_icon: * @context: a #GtkStyleContext * @cr: a #cairo_t * @texture: a #GdkTexture containing the icon to draw * @x: X position for the @texture * @y: Y position for the @texture * * Renders the icon in @texture at the specified @x and @y coordinates. * * This function will render the icon in @texture at exactly its size, * regardless of scaling factors, which may not be appropriate when * drawing on displays with high pixel densities. * **/ void gtk_render_icon (GtkStyleContext *context, cairo_t *cr, GdkTexture *texture, gdouble x, gdouble y) { cairo_surface_t *surface; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); surface = gdk_texture_download_surface (texture); gtk_css_style_render_icon_surface (gtk_style_context_lookup_style (context), cr, surface, x, y); cairo_surface_destroy (surface); }