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https://github.com/emilk/egui.git
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WIP: clip_rect
This commit is contained in:
Emil Ernerfeldt
@@ -15,8 +15,6 @@ pub struct Vertex {
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pub color: Color,
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}
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// ----------------------------------------------------------------------------
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#[derive(Clone, Debug, Default, Serialize)]
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pub struct Mesh {
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/// Draw as triangles (i.e. the length is a multiple of three)
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@@ -24,6 +22,11 @@ pub struct Mesh {
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pub vertices: Vec<Vertex>,
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}
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/// Grouped by clip rectangles, in pixel coordinates
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pub type PaintBatches = Vec<(Rect, Mesh)>;
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// ----------------------------------------------------------------------------
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impl Mesh {
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pub fn append(&mut self, mesh: &Mesh) {
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let index_offset = self.vertices.len() as u32;
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@@ -373,139 +376,141 @@ pub fn paint_path(
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// ----------------------------------------------------------------------------
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pub struct Mesher {
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pub options: MesherOptions,
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/// Where the output goes
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pub mesh: Mesh,
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}
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impl Mesher {
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pub fn new(pixels_per_point: f32) -> Mesher {
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Mesher {
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options: MesherOptions {
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anti_alias: true,
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aa_size: 1.0 / pixels_per_point,
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},
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mesh: Default::default(),
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pub fn mesh_command(
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options: &MesherOptions,
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fonts: &Fonts,
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command: PaintCmd,
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out_mesh: &mut Mesh,
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) {
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match command {
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PaintCmd::Circle {
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center,
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fill_color,
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outline,
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radius,
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} => {
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let mut path = Path::default();
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path.add_circle(center, radius);
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if let Some(color) = fill_color {
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fill_closed_path(out_mesh, options, &path.0, color);
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}
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if let Some(outline) = outline {
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paint_path(
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out_mesh,
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options,
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Closed,
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&path.0,
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outline.color,
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outline.width,
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);
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}
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}
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}
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pub fn paint(&mut self, fonts: &Fonts, commands: &[PaintCmd]) {
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let mut path = Path::default();
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for cmd in commands {
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match cmd {
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PaintCmd::Circle {
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center,
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fill_color,
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outline,
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radius,
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} => {
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path.clear();
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path.add_circle(*center, *radius);
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if let Some(color) = fill_color {
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fill_closed_path(&mut self.mesh, &self.options, &path.0, *color);
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}
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if let Some(outline) = outline {
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paint_path(
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&mut self.mesh,
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&self.options,
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Closed,
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&path.0,
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outline.color,
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outline.width,
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);
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}
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}
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PaintCmd::Mesh(cmd_frame) => {
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self.mesh.append(cmd_frame);
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}
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PaintCmd::Line {
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points,
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color,
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width,
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} => {
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let n = points.len();
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if n >= 2 {
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path.clear();
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path.add_line(points);
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paint_path(&mut self.mesh, &self.options, Open, &path.0, *color, *width);
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}
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}
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PaintCmd::Path {
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path,
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PaintCmd::Mesh(mesh) => {
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out_mesh.append(&mesh);
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}
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PaintCmd::Line {
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points,
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color,
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width,
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} => {
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let n = points.len();
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if n >= 2 {
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let mut path = Path::default();
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path.add_line(&points);
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paint_path(out_mesh, options, Open, &path.0, color, width);
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}
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}
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PaintCmd::Path {
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path,
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closed,
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fill_color,
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outline,
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} => {
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if let Some(fill_color) = fill_color {
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debug_assert!(
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closed,
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fill_color,
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outline,
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} => {
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if let Some(fill_color) = fill_color {
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debug_assert!(
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*closed,
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"You asked to fill a path that is not closed. That makes no sense."
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);
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fill_closed_path(&mut self.mesh, &self.options, &path.0, *fill_color);
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}
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if let Some(outline) = outline {
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paint_path(
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&mut self.mesh,
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&self.options,
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Closed,
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&path.0,
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outline.color,
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outline.width,
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);
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}
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}
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PaintCmd::Rect {
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corner_radius,
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fill_color,
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outline,
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rect,
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} => {
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path.clear();
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path.add_rounded_rectangle(rect, *corner_radius);
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if let Some(fill_color) = fill_color {
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fill_closed_path(&mut self.mesh, &self.options, &path.0, *fill_color);
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}
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if let Some(outline) = outline {
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paint_path(
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&mut self.mesh,
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&self.options,
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Closed,
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&path.0,
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outline.color,
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outline.width,
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);
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}
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}
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PaintCmd::Text {
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color,
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pos,
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text,
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text_style,
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x_offsets,
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} => {
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let font = &fonts[*text_style];
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for (c, x_offset) in text.chars().zip(x_offsets.iter()) {
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if let Some(glyph) = font.uv_rect(c) {
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let mut top_left = Vertex {
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pos: *pos + glyph.offset + vec2(*x_offset, 0.0),
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uv: glyph.min,
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color: *color,
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};
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top_left.pos.x = font.round_to_pixel(top_left.pos.x); // Pixel-perfection.
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top_left.pos.y = font.round_to_pixel(top_left.pos.y); // Pixel-perfection.
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let bottom_right = Vertex {
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pos: top_left.pos + glyph.size,
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uv: glyph.max,
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color: *color,
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};
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self.mesh.add_rect(top_left, bottom_right);
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}
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}
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"You asked to fill a path that is not closed. That makes no sense."
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);
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fill_closed_path(out_mesh, options, &path.0, fill_color);
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}
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if let Some(outline) = outline {
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paint_path(
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out_mesh,
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options,
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Closed,
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&path.0,
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outline.color,
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outline.width,
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);
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}
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}
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PaintCmd::Rect {
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corner_radius,
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fill_color,
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outline,
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rect,
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} => {
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let mut path = Path::default();
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path.add_rounded_rectangle(&rect, corner_radius);
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if let Some(fill_color) = fill_color {
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fill_closed_path(out_mesh, options, &path.0, fill_color);
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}
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if let Some(outline) = outline {
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paint_path(
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out_mesh,
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options,
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Closed,
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&path.0,
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outline.color,
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outline.width,
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);
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}
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}
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PaintCmd::Text {
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color,
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pos,
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text,
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text_style,
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x_offsets,
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} => {
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let font = &fonts[text_style];
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for (c, x_offset) in text.chars().zip(x_offsets.iter()) {
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if let Some(glyph) = font.uv_rect(c) {
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let mut top_left = Vertex {
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pos: pos + glyph.offset + vec2(*x_offset, 0.0),
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uv: glyph.min,
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color: color,
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};
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top_left.pos.x = font.round_to_pixel(top_left.pos.x); // Pixel-perfection.
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top_left.pos.y = font.round_to_pixel(top_left.pos.y); // Pixel-perfection.
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let bottom_right = Vertex {
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pos: top_left.pos + glyph.size,
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uv: glyph.max,
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color: color,
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};
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out_mesh.add_rect(top_left, bottom_right);
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}
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}
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}
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}
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}
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pub fn mesh_paint_commands(
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options: &MesherOptions,
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fonts: &Fonts,
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commands: Vec<(Rect, PaintCmd)>,
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) -> Vec<(Rect, Mesh)> {
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let mut batches = PaintBatches::default();
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for (clip_rect, cmd) in commands {
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// TODO: cull(clip_rect, cmd)
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if batches.is_empty() || batches.last().unwrap().0 != clip_rect {
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batches.push((clip_rect, Mesh::default()));
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}
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let out_mesh = &mut batches.last_mut().unwrap().1;
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mesh_command(options, fonts, cmd, out_mesh);
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}
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batches
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}
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