193 lines
7.9 KiB
Vala
193 lines
7.9 KiB
Vala
using Cairo;
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using Gee;
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using Gdk;
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using Gtk;
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using Xmpp.Util;
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namespace Dino.Ui {
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public class AvatarDrawer {
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public const string GRAY = "555753";
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private Gee.List<AvatarTile> tiles = new ArrayList<AvatarTile>();
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private int height = 35;
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private int width = 35;
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private bool gray;
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private int base_factor = 1;
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private string font_family = "Sans";
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public AvatarDrawer size(int height, int width = height) {
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this.height = height;
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this.width = width;
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return this;
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}
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public AvatarDrawer grayscale() {
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this.gray = true;
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return this;
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}
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public AvatarDrawer tile(Pixbuf? image, string? name, string? hex_color) {
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tiles.add(new AvatarTile(image, name, hex_color));
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return this;
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}
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public AvatarDrawer plus() {
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tiles.add(new AvatarTile(null, "…", GRAY));
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return this;
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}
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public AvatarDrawer scale(int base_factor) {
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this.base_factor = base_factor;
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return this;
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}
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public AvatarDrawer font(string font_family) {
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this.font_family = font_family;
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return this;
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}
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public ImageSurface draw_image_surface() {
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ImageSurface surface = new ImageSurface(Format.ARGB32, width, height);
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draw_on_context(new Context(surface));
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return surface;
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}
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public void draw_on_context(Cairo.Context ctx) {
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double radius = 3 * base_factor;
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double degrees = Math.PI / 180.0;
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ctx.new_sub_path();
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ctx.arc(width - radius, radius, radius, -90 * degrees, 0 * degrees);
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ctx.arc(width - radius, height - radius, radius, 0 * degrees, 90 * degrees);
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ctx.arc(radius, height - radius, radius, 90 * degrees, 180 * degrees);
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ctx.arc(radius, radius, radius, 180 * degrees, 270 * degrees);
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ctx.close_path();
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ctx.clip();
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if (this.tiles.size == 4) {
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Cairo.Surface buffer = new Cairo.Surface.similar(ctx.get_target(), Cairo.Content.COLOR_ALPHA, width, height);
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Cairo.Context bufctx = new Cairo.Context(buffer);
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bufctx.scale(0.5, 0.5);
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bufctx.set_source_surface(sub_surface_idx(ctx, 0, width - 1, height - 1, 2 * base_factor), 0, 0);
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bufctx.paint();
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bufctx.set_source_surface(sub_surface_idx(ctx, 1, width - 1, height - 1, 2 * base_factor), width + 1, 0);
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bufctx.paint();
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bufctx.set_source_surface(sub_surface_idx(ctx, 2, width - 1, height - 1, 2 * base_factor), 0, height + 1);
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bufctx.paint();
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bufctx.set_source_surface(sub_surface_idx(ctx, 3, width - 1, height - 1, 2 * base_factor), width + 1, height + 1);
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bufctx.paint();
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ctx.set_source_surface(buffer, 0, 0);
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ctx.paint();
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} else if (this.tiles.size == 3) {
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Cairo.Surface buffer = new Cairo.Surface.similar(ctx.get_target(), Cairo.Content.COLOR_ALPHA, width, height);
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Cairo.Context bufctx = new Cairo.Context(buffer);
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bufctx.scale(0.5, 0.5);
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bufctx.set_source_surface(sub_surface_idx(ctx, 0, width - 1, height - 1, 2 * base_factor), 0, 0);
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bufctx.paint();
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bufctx.set_source_surface(sub_surface_idx(ctx, 1, width - 1, height * 2, 2 * base_factor), width + 1, 0);
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bufctx.paint();
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bufctx.set_source_surface(sub_surface_idx(ctx, 2, width - 1, height - 1, 2 * base_factor), 0, height + 1);
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bufctx.paint();
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ctx.set_source_surface(buffer, 0, 0);
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ctx.paint();
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} else if (this.tiles.size == 2) {
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Cairo.Surface buffer = new Cairo.Surface.similar(ctx.get_target(), Cairo.Content.COLOR_ALPHA, width, height);
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Cairo.Context bufctx = new Cairo.Context(buffer);
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bufctx.scale(0.5, 0.5);
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bufctx.set_source_surface(sub_surface_idx(ctx, 0, width - 1, height * 2, 2 * base_factor), 0, 0);
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bufctx.paint();
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bufctx.set_source_surface(sub_surface_idx(ctx, 1, width - 1, height * 2, 2 * base_factor), width + 1, 0);
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bufctx.paint();
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ctx.set_source_surface(buffer, 0, 0);
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ctx.paint();
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} else if (this.tiles.size == 1) {
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ctx.set_source_surface(sub_surface_idx(ctx, 0, width, height, base_factor), 0, 0);
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ctx.paint();
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} else if (this.tiles.size == 0) {
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ctx.set_source_surface(sub_surface_idx(ctx, -1, width, height, base_factor), 0, 0);
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ctx.paint();
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}
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if (gray) {
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// convert to greyscale
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ctx.set_operator(Cairo.Operator.HSL_COLOR);
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ctx.set_source_rgb(1, 1, 1);
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ctx.rectangle(0, 0, width, height);
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ctx.fill();
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// make the visible part more light
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ctx.set_operator(Cairo.Operator.ATOP);
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ctx.set_source_rgba(1, 1, 1, 0.7);
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ctx.rectangle(0, 0, width, height);
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ctx.fill();
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}
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ctx.set_source_rgb(0, 0, 0);
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}
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private Cairo.Surface sub_surface_idx(Cairo.Context ctx, int idx, int width, int height, int font_factor = 1) {
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Gdk.Pixbuf? avatar = idx >= 0 ? tiles[idx].image : null;
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string? name = idx >= 0 ? tiles[idx].name : "";
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string hex_color = !gray && idx >= 0 ? tiles[idx].hex_color : GRAY;
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return sub_surface(ctx, font_family, avatar, name, hex_color, width, height, font_factor);
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}
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private static Cairo.Surface sub_surface(Cairo.Context ctx, string font_family, Gdk.Pixbuf? avatar, string? name, string? hex_color, int width, int height, int font_factor = 1) {
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Cairo.Surface buffer = new Cairo.Surface.similar(ctx.get_target(), Cairo.Content.COLOR_ALPHA, width, height);
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Cairo.Context bufctx = new Cairo.Context(buffer);
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if (avatar == null) {
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set_source_hex_color(bufctx, hex_color ?? GRAY);
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bufctx.rectangle(0, 0, width, height);
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bufctx.fill();
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string text = name == null ? "…" : name.get_char(0).toupper().to_string();
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bufctx.select_font_face(font_family, Cairo.FontSlant.NORMAL, Cairo.FontWeight.NORMAL);
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bufctx.set_font_size(width / font_factor < 40 ? font_factor * 17 : font_factor * 25);
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Cairo.TextExtents extents;
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bufctx.text_extents(text, out extents);
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double x_pos = width/2 - (extents.width/2 + extents.x_bearing);
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double y_pos = height/2 - (extents.height/2 + extents.y_bearing);
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bufctx.move_to(x_pos, y_pos);
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bufctx.set_source_rgba(1, 1, 1, 1);
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bufctx.show_text(text);
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} else {
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double w_scale = (double) width / avatar.width;
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double h_scale = (double) height / avatar.height;
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double scale = double.max(w_scale, h_scale);
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bufctx.scale(scale, scale);
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double x_off = 0, y_off = 0;
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if (scale == h_scale) {
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x_off = (width / scale - avatar.width) / 2.0;
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} else {
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y_off = (height / scale - avatar.height) / 2.0;
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}
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Gdk.cairo_set_source_pixbuf(bufctx, avatar, x_off, y_off);
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bufctx.get_source().set_filter(Cairo.Filter.BEST);
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bufctx.paint();
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}
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return buffer;
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}
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private static void set_source_hex_color(Cairo.Context ctx, string hex_color) {
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ctx.set_source_rgba((double) from_hex(hex_color.substring(0, 2)) / 255,
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(double) from_hex(hex_color.substring(2, 2)) / 255,
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(double) from_hex(hex_color.substring(4, 2)) / 255,
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hex_color.length > 6 ? (double) from_hex(hex_color.substring(6, 2)) / 255 : 1);
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}
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}
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private class AvatarTile {
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public Pixbuf? image { get; private set; }
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public string? name { get; private set; }
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public string? hex_color { get; private set; }
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public AvatarTile(Pixbuf? image, string? name, string? hex_color) {
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this.image = image;
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this.name = name;
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this.hex_color = hex_color;
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}
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}
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} |