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Adds linear gradient support to 2D meshes in the canvas widget.

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This commit is contained in:
shan 2022-09-29 10:52:58 -07:00
parent 97f385e093
commit 40f45d7b7e
40 changed files with 2041 additions and 655 deletions
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41
examples/geometry/src/main.rs
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@ -1,6 +1,9 @@
//! This example showcases a simple native custom widget that renders using
//! arbitrary low-level geometry.
//!
//TODO need to update this now that vertex data doesn't contain color data
mod rainbow {
use iced::Color;
// For now, to implement a custom native widget you will need to add
// `iced_native` and `iced_wgpu` to your dependencies.
//
@ -12,6 +15,7 @@ mod rainbow {
// implemented by `iced_wgpu` and other renderers.
use iced_graphics::renderer::{self, Renderer};
use iced_graphics::{Backend, Primitive};
use iced_graphics::shader::Shader;
use iced_native::widget::{self, Widget};
use iced_native::{
@ -63,20 +67,20 @@ mod rainbow {
cursor_position: Point,
_viewport: &Rectangle,
) {
use iced_graphics::triangle::{Mesh2D, Vertex2D};
use iced_graphics::triangle::{Mesh2D, Shader, Vertex2D};
use iced_native::Renderer as _;
let b = layout.bounds();
// R O Y G B I V
let color_r = [1.0, 0.0, 0.0, 1.0];
let color_o = [1.0, 0.5, 0.0, 1.0];
let color_y = [1.0, 1.0, 0.0, 1.0];
let color_g = [0.0, 1.0, 0.0, 1.0];
let color_gb = [0.0, 1.0, 0.5, 1.0];
let color_b = [0.0, 0.2, 1.0, 1.0];
let color_i = [0.5, 0.0, 1.0, 1.0];
let color_v = [0.75, 0.0, 0.5, 1.0];
// let color_r = [1.0, 0.0, 0.0, 1.0];
// let color_o = [1.0, 0.5, 0.0, 1.0];
// let color_y = [1.0, 1.0, 0.0, 1.0];
// let color_g = [0.0, 1.0, 0.0, 1.0];
// let color_gb = [0.0, 1.0, 0.5, 1.0];
// let color_b = [0.0, 0.2, 1.0, 1.0];
// let color_i = [0.5, 0.0, 1.0, 1.0];
// let color_v = [0.75, 0.0, 0.5, 1.0];
let posn_center = {
if b.contains(cursor_position) {
@ -101,39 +105,39 @@ mod rainbow {
vertices: vec![
Vertex2D {
position: posn_center,
color: [1.0, 1.0, 1.0, 1.0],
// color: [1.0, 1.0, 1.0, 1.0],
},
Vertex2D {
position: posn_tl,
color: color_r,
// color: color_r,
},
Vertex2D {
position: posn_t,
color: color_o,
// color: color_o,
},
Vertex2D {
position: posn_tr,
color: color_y,
// color: color_y,
},
Vertex2D {
position: posn_r,
color: color_g,
// color: color_g,
},
Vertex2D {
position: posn_br,
color: color_gb,
// color: color_gb,
},
Vertex2D {
position: posn_b,
color: color_b,
// color: color_b,
},
Vertex2D {
position: posn_bl,
color: color_i,
// color: color_i,
},
Vertex2D {
position: posn_l,
color: color_v,
// color: color_v,
},
],
indices: vec![
@ -147,6 +151,7 @@ mod rainbow {
0, 8, 1, // L
],
},
shader: Shader::Solid(Color::BLACK),
};
renderer.with_translation(Vector::new(b.x, b.y), |renderer| {