def render_round_floating_button(cr, x, y, color, pixbuf, z=2, radius=gui.style.FLOATING_BUTTON_RADIUS): """Draw a round floating button with a standard size. :param cairo.Context cr: Context in which to draw. :param float x: X coordinate of the center pixel. :param float y: Y coordinate of the center pixel. :param lib.color.UIColor color: Color for the button base. :param GdkPixbuf.Pixbuf pixbuf: Icon to render. :param int z: Simulated height of the button above the canvas. :param float radius: Button radius, in pixels. These are used within certain overlays tightly associated with particular interaction modes for manipulating things on the canvas. """ x = round(float(x)) y = round(float(y)) render_round_floating_color_chip(cr, x, y, color, radius=radius, z=z) cr.save() w = pixbuf.get_width() h = pixbuf.get_height() x -= w / 2 y -= h / 2 Gdk.cairo_set_source_pixbuf(cr, pixbuf, x, y) cr.rectangle(x, y, w, h) cr.clip() cr.paint() cr.restore()
def _draw_cb(self, da, cr): """Paint a preview of the current brush to the view.""" if not self._brush_preview: cr.set_source_rgb(1, 0, 1) cr.paint() return aw = da.get_allocated_width() ah = da.get_allocated_height() # Work in a temporary group so that # the result can be masked with a gradient later. cr.push_group() # Paint a shadow line around the edge of # where the the brush preview will go. # There's an additional top border of one pixel # for alignment with the color preview widget # in the other corner. cr.rectangle(1.5, 2.5, aw - 3, ah) cr.set_line_join(cairo.LINE_JOIN_ROUND) cr.set_source_rgba(*self._OUTLINE_RGBA) cr.set_line_width(3) cr.stroke() # Scale and align the brush preview in its own saved context cr.save() # Clip rectangle for the bit in the middle of the shadow. # Note that the bottom edge isn't shadowed. cr.rectangle(1, 2, aw - 2, ah) cr.clip() # Scale and align the preview to the top of that clip rect. preview = self._brush_preview pw = preview.get_width() ph = preview.get_height() area_size = float(max(aw, ah)) - 2 preview_size = float(max(pw, ph)) x = math.floor(-pw / 2.0) y = 0 cr.translate(aw / 2.0, 2) scale = area_size / preview_size cr.scale(scale, scale) Gdk.cairo_set_source_pixbuf(cr, preview, x, y) cr.paint() cr.restore() # Finally a highlight around the edge in the house style # Note that the bottom edge isn't highlighted. cr.rectangle(1.5, 2.5, aw - 3, ah) cr.set_line_width(1) cr.set_source_rgba(*self._EDGE_HIGHLIGHT_RGBA) cr.stroke() # Paint the group within a gradient mask cr.pop_group_to_source() mask = cairo.LinearGradient(0, 0, 0, ah) mask.add_color_stop_rgba(0.0, 1, 1, 1, 1.0) mask.add_color_stop_rgba(0.8, 1, 1, 1, 1.0) mask.add_color_stop_rgba(0.95, 1, 1, 1, 0.5) mask.add_color_stop_rgba(1.0, 1, 1, 1, 0.1) cr.mask(mask)
def draw_cb(self, widget, cr): # Paint the base color, and the list's pixbuf. state_flags = widget.get_state_flags() style_context = widget.get_style_context() style_context.save() bg_color_gdk = style_context.get_background_color(state_flags) bg_color = uicolor.from_gdk_rgba(bg_color_gdk) cr.set_source_rgb(*bg_color.get_rgb()) cr.paint() Gdk.cairo_set_source_pixbuf(cr, self.pixbuf, 0, 0) cr.paint() # border colors gdkrgba = style_context.get_background_color(state_flags | Gtk.StateFlags.SELECTED) selected_color = uicolor.from_gdk_rgba(gdkrgba) gdkrgba = style_context.get_background_color(state_flags | Gtk.StateFlags.NORMAL) insertion_color = uicolor.from_gdk_rgba(gdkrgba) style_context.restore() # Draw borders last_i = len(self.itemlist) - 1 for i, b in enumerate(self.itemlist): rect_color = None if b is self.selected: rect_color = selected_color elif self.drag_insertion_index is not None: if i == self.drag_insertion_index \ or (i == last_i and self.drag_insertion_index > i): rect_color = insertion_color if rect_color is None: continue x = (i % self.tiles_w) * self.total_w y = (i // self.tiles_w) * self.total_h w = self.total_w h = self.total_h def shrink(pixels, x, y, w, h): x += pixels y += pixels w -= 2 * pixels h -= 2 * pixels return (x, y, w, h) x, y, w, h = shrink(self.spacing_outside, x, y, w, h) for j in xrange(self.border_visible_outside_cell): x, y, w, h = shrink(-1, x, y, w, h) max_j = self.border_visible + self.border_visible_outside_cell for j in xrange(max_j): cr.set_source_rgb(*rect_color.get_rgb()) cr.rectangle(x, y, w - 1, h - 1) # FIXME: check pixel alignment cr.stroke() x, y, w, h = shrink(1, x, y, w, h) return True
def render_background_cb(self, cr, wd, ht, icon_border=None): self._backend.set_brush_color(*self._hsv) size = self._backend.get_size() pixbuf = GdkPixbuf.Pixbuf.new( GdkPixbuf.Colorspace.RGB, True, 8, size, size, ) arr = gdkpixbuf2numpy(pixbuf) self._backend.render(arr) self._dx = (wd - size) // 2 self._dy = (ht - size) // 2 cr.translate(self._dx, self._dy) Gdk.cairo_set_source_pixbuf(cr, pixbuf, 0, 0) cr.paint()
def cairo_request(self): """Access via a temporary Cairo context. Modifications are copied back into the backing pixbuf when the context manager finishes. """ # Make a Cairo surface copy of the subpixbuf surf = cairo.ImageSurface( cairo.FORMAT_ARGB32, self.pixbuf.get_width(), self.pixbuf.get_height(), ) cr = cairo.Context(surf) Gdk.cairo_set_source_pixbuf(cr, self.pixbuf, 0, 0) cr.paint() # User can modify its content with Cairo operations yield cr # Put the modified data back into the tile-aligned pixbuf. dx = self.x - self.ex dy = self.y - self.ey pixbuf = Gdk.pixbuf_get_from_surface(surf, 0, 0, self.w, self.h) pixbuf.copy_area(0, 0, self.w, self.h, self.epixbuf, dx, dy)
def render_brush_preview_pixbuf(brushinfo, max_edge_tiles=4): """Renders brush preview images :param BrushInfo brushinfo: settings to render :param int max_edge_tiles: Use at most this many tiles along an edge :returns: Preview image, at 128x128 pixels :rtype: GdkPixbuf This generates the preview image (128px icon) used for brushes which don't have saved ones. These include brushes picked from .ORA files where the parent_brush_name doesn't correspond to a brush in the user's MyPaint brushes - they're used as the default, and for the Auto button in the Brush Icon editor. Brushstrokes are inherently unpredictable in size, so the allowable area is grown until the brush fits or until the rendering becomes too big. `max_edge_tiles` limits this growth. """ assert max_edge_tiles >= 1 brushinfo = brushinfo.clone() # avoid capturing a ref brush = Brush(brushinfo) surface = lib.tiledsurface.Surface() n = lib.tiledsurface.N for size_in_tiles in range(1, max_edge_tiles): width = n * size_in_tiles height = n * size_in_tiles surface.clear() fg, spiral = _brush_preview_bg_fg(surface, size_in_tiles, brushinfo) brushinfo.set_color_rgb(fg) brush.reset() # Curve shape = _variable_pressure_scribble(width, height, size_in_tiles) surface.begin_atomic() for dt, x, y, p, xt, yt in shape: brush.stroke_to(surface.backend, x, y, p, xt, yt, dt, 1.0, 0.0, 0.0) surface.end_atomic() # Check rendered size tposs = surface.tiledict.keys() outside = min({tx for tx, ty in tposs}) < 0 outside = outside or (min({ty for tx, ty in tposs}) < 0) outside = outside or (max({tx for tx, ty in tposs}) >= size_in_tiles) outside = outside or (max({ty for tx, ty in tposs}) >= size_in_tiles) if not outside: break # Convert to pixbuf at the right scale rect = (0, 0, width, height) pixbuf = render_as_pixbuf(surface, *rect, alpha=True) if max(width, height) != 128: interp = (GdkPixbuf.InterpType.NEAREST if max(width, height) < 128 else GdkPixbuf.InterpType.BILINEAR) pixbuf = pixbuf.scale_simple(128, 128, interp) # Composite over a checquered bg via Cairo: shows erases size = gui.style.ALPHA_CHECK_SIZE nchecks = int(128 // size) cairo_surf = cairo.ImageSurface(cairo.FORMAT_ARGB32, 128, 128) cr = cairo.Context(cairo_surf) render_checks(cr, size, nchecks) Gdk.cairo_set_source_pixbuf(cr, pixbuf, 0, 0) cr.paint() cairo_surf.flush() return Gdk.pixbuf_get_from_surface(cairo_surf, 0, 0, 128, 128)
def make_preview(thumb, preview_size): """Convert a layer's thumbnail into a nice preview image.""" # Check size check_size = 2 while check_size < (preview_size / 6) and check_size < 16: check_size *= 2 blank = GdkPixbuf.Pixbuf.new( GdkPixbuf.Colorspace.RGB, True, 8, preview_size, preview_size, ) blank.fill(0x00000000) if thumb is None: thumb = blank # Make a square of chex preview = blank.composite_color_simple( dest_width=preview_size, dest_height=preview_size, interp_type=GdkPixbuf.InterpType.NEAREST, overall_alpha=255, check_size=check_size, color1=0xff707070, color2=0xff808080, ) w = thumb.get_width() h = thumb.get_height() scale = preview_size / max(w, h) w *= scale h *= scale x = (preview_size - w) // 2 y = (preview_size - h) // 2 thumb.composite( dest=preview, dest_x=x, dest_y=y, dest_width=w, dest_height=h, offset_x=x, offset_y=y, scale_x=scale, scale_y=scale, interp_type=GdkPixbuf.InterpType.BILINEAR, overall_alpha=255, ) # Add some very minor decorations.. surf = cairo.ImageSurface(cairo.FORMAT_ARGB32, preview_size, preview_size) cr = cairo.Context(surf) Gdk.cairo_set_source_pixbuf(cr, preview, 0, 0) cr.paint() cr.set_source_rgba(1, 1, 1, 0.1) cr.rectangle(0.5, 0.5, preview_size - 1, preview_size - 1) cr.set_line_width(1.0) cr.stroke() surf.flush() preview = Gdk.pixbuf_get_from_surface( surf, 0, 0, preview_size, preview_size, ) return preview