diff options
Diffstat (limited to '')
| -rw-r--r-- | glow/src/backend.rs | 7 | ||||
| -rw-r--r-- | glow/src/shader/common/gradient.frag | 48 | ||||
| -rw-r--r-- | glow/src/shader/common/triangle.frag | 4 | ||||
| -rw-r--r-- | glow/src/shader/common/triangle.vert | 6 | ||||
| -rw-r--r-- | glow/src/triangle.rs | 228 | ||||
| -rw-r--r-- | glow/src/triangle/gradient.rs | 189 | ||||
| -rw-r--r-- | glow/src/triangle/solid.rs | 67 | ||||
| -rw-r--r-- | glow/src/window/compositor.rs | 3 |
8 files changed, 429 insertions, 123 deletions
diff --git a/glow/src/backend.rs b/glow/src/backend.rs index 78d4229e..6fc4fb38 100644 --- a/glow/src/backend.rs +++ b/glow/src/backend.rs @@ -1,7 +1,6 @@ -use crate::program; +use crate::{program, triangle}; use crate::quad; use crate::text; -use crate::triangle; use crate::{Settings, Transformation, Viewport}; use iced_graphics::backend; @@ -100,16 +99,16 @@ impl Backend { ); } - if !layer.meshes.is_empty() { + if !layer.meshes.0.is_empty() { let scaled = transformation * Transformation::scale(scale_factor, scale_factor); self.triangle_pipeline.draw( + &layer.meshes, gl, target_height, scaled, scale_factor, - &layer.meshes, ); } diff --git a/glow/src/shader/common/gradient.frag b/glow/src/shader/common/gradient.frag new file mode 100644 index 00000000..588f63e0 --- /dev/null +++ b/glow/src/shader/common/gradient.frag @@ -0,0 +1,48 @@ +// GLSL does not support dynamically sized arrays without SSBOs +#define MAX_STOPS 64 + +#ifdef GL_ES +#ifdef GL_FRAGMENT_PRECISION_HIGH +precision highp float; +#else +precision mediump float; +#endif +#endif + +#ifdef HIGHER_THAN_300 +layout (location = 0) out vec4 fragColor; +#define gl_FragColor fragColor +#endif + +in vec2 raw_position; + +uniform vec2 gradient_start; +uniform vec2 gradient_end; + +uniform uint color_stops_size; +uniform float color_stop_offsets[MAX_STOPS]; +uniform vec4 color_stop_colors[MAX_STOPS]; + +void main() { + vec2 gradient_vec = vec2(gradient_end - gradient_start); + vec2 current_vec = vec2(raw_position.xy - gradient_start); + vec2 unit = normalize(gradient_vec); + float coord_offset = dot(unit, current_vec) / length(gradient_vec); + + for (uint i = 0; i < color_stops_size - 1; i++) { + float stop_offset = color_stop_offsets[i]; + float next_stop_offset = color_stop_offsets[i + 1]; + + if (stop_offset <= coord_offset && coord_offset <= next_stop_offset) { + fragColor = mix(color_stop_colors[i], color_stop_colors[i+1], smoothstep( + stop_offset, + next_stop_offset, + coord_offset + )); + } else if (coord_offset < color_stop_offsets[0]) { + fragColor = color_stop_colors[0]; + } else if (coord_offset > color_stop_offsets[color_stops_size - 1]) { + fragColor = color_stop_colors[color_stops_size - 1]; + } + } +}
\ No newline at end of file diff --git a/glow/src/shader/common/triangle.frag b/glow/src/shader/common/triangle.frag index e8689f2e..0ee65239 100644 --- a/glow/src/shader/common/triangle.frag +++ b/glow/src/shader/common/triangle.frag @@ -11,8 +11,8 @@ out vec4 fragColor; #define gl_FragColor fragColor #endif -in vec4 v_Color; +uniform vec4 color; void main() { - gl_FragColor = v_Color; + fragColor = color; }
\ No newline at end of file diff --git a/glow/src/shader/common/triangle.vert b/glow/src/shader/common/triangle.vert index d0494a5f..09a4e324 100644 --- a/glow/src/shader/common/triangle.vert +++ b/glow/src/shader/common/triangle.vert @@ -1,11 +1,9 @@ uniform mat4 u_Transform; in vec2 i_Position; -in vec4 i_Color; - -out vec4 v_Color; +out vec2 raw_position; void main() { gl_Position = u_Transform * vec4(i_Position, 0.0, 1.0); - v_Color = i_Color; + raw_position = i_Position; }
\ No newline at end of file diff --git a/glow/src/triangle.rs b/glow/src/triangle.rs index ae4f83ef..7d0e14c7 100644 --- a/glow/src/triangle.rs +++ b/glow/src/triangle.rs @@ -1,66 +1,41 @@ -//! Draw meshes of triangles. +//! Draw meshes of triangle. +mod gradient; +mod solid; + use crate::program::{self, Shader}; use crate::Transformation; use glow::HasContext; -use iced_graphics::layer; +use iced_graphics::layer::{Mesh, Meshes}; +use iced_graphics::shader; use std::marker::PhantomData; +use crate::triangle::gradient::GradientProgram; +use crate::triangle::solid::SolidProgram; pub use iced_graphics::triangle::{Mesh2D, Vertex2D}; -const VERTEX_BUFFER_SIZE: usize = 10_000; -const INDEX_BUFFER_SIZE: usize = 10_000; - #[derive(Debug)] pub(crate) struct Pipeline { - program: <glow::Context as HasContext>::Program, vertex_array: <glow::Context as HasContext>::VertexArray, vertices: Buffer<Vertex2D>, indices: Buffer<u32>, - transform_location: <glow::Context as HasContext>::UniformLocation, current_transform: Transformation, + programs: TrianglePrograms, } -impl Pipeline { - pub fn new( - gl: &glow::Context, - shader_version: &program::Version, - ) -> Pipeline { - let program = unsafe { - let vertex_shader = Shader::vertex( - gl, - shader_version, - include_str!("shader/common/triangle.vert"), - ); - let fragment_shader = Shader::fragment( - gl, - shader_version, - include_str!("shader/common/triangle.frag"), - ); - - program::create( - gl, - &[vertex_shader, fragment_shader], - &[(0, "i_Position"), (1, "i_Color")], - ) - }; - - let transform_location = - unsafe { gl.get_uniform_location(program, "u_Transform") } - .expect("Get transform location"); - - unsafe { - gl.use_program(Some(program)); - - let transform: [f32; 16] = Transformation::identity().into(); - gl.uniform_matrix_4_f32_slice( - Some(&transform_location), - false, - &transform, - ); +#[derive(Debug)] +struct TrianglePrograms { + solid: TriangleProgram, + gradient: TriangleProgram, +} - gl.use_program(None); - } +#[derive(Debug)] +enum TriangleProgram { + Solid(SolidProgram), + Gradient(GradientProgram), +} +impl Pipeline { + pub fn new(gl: &glow::Context, shader_version: &program::Version) -> Self { let vertex_array = unsafe { gl.create_vertex_array().expect("Create vertex array") }; @@ -73,7 +48,7 @@ impl Pipeline { gl, glow::ARRAY_BUFFER, glow::DYNAMIC_DRAW, - VERTEX_BUFFER_SIZE, + std::mem::size_of::<Vertex2D>() as usize, ) }; @@ -82,7 +57,7 @@ impl Pipeline { gl, glow::ELEMENT_ARRAY_BUFFER, glow::DYNAMIC_DRAW, - INDEX_BUFFER_SIZE, + std::mem::size_of::<u32>() as usize, ) }; @@ -92,58 +67,45 @@ impl Pipeline { gl.enable_vertex_attrib_array(0); gl.vertex_attrib_pointer_f32(0, 2, glow::FLOAT, false, stride, 0); - gl.enable_vertex_attrib_array(1); - gl.vertex_attrib_pointer_f32( - 1, - 4, - glow::FLOAT, - false, - stride, - 4 * 2, - ); - gl.bind_vertex_array(None); - } + }; - Pipeline { - program, + Self { vertex_array, vertices, indices, - transform_location, current_transform: Transformation::identity(), + programs: TrianglePrograms { + solid: TriangleProgram::Solid(SolidProgram::new( + gl, + shader_version, + )), + gradient: TriangleProgram::Gradient(GradientProgram::new( + gl, + shader_version, + )), + }, } } pub fn draw( &mut self, + meshes: &Meshes<'_>, gl: &glow::Context, target_height: u32, transformation: Transformation, scale_factor: f32, - meshes: &[layer::Mesh<'_>], ) { unsafe { gl.enable(glow::MULTISAMPLE); gl.enable(glow::SCISSOR_TEST); - gl.use_program(Some(self.program)); - gl.bind_vertex_array(Some(self.vertex_array)); + gl.bind_vertex_array(Some(self.vertex_array)) } - // This looks a bit crazy, but we are just counting how many vertices - // and indices we will need to handle. - // TODO: Improve readability - let (total_vertices, total_indices) = meshes - .iter() - .map(|layer::Mesh { buffers, .. }| { - (buffers.vertices.len(), buffers.indices.len()) - }) - .fold((0, 0), |(total_v, total_i), (v, i)| { - (total_v + v, total_i + i) - }); - - // Then we ensure the current buffers are big enough, resizing if - // necessary + //count the total number of vertices & indices we need to handle for all meshes + let (total_vertices, total_indices) = meshes.attribute_count(); + + // Then we ensure the current attribute buffers are big enough, resizing if necessary unsafe { self.vertices.bind(gl, total_vertices); self.indices.bind(gl, total_indices); @@ -153,7 +115,7 @@ impl Pipeline { let mut last_vertex = 0; let mut last_index = 0; - for layer::Mesh { buffers, .. } in meshes { + for Mesh { buffers, .. } in meshes.0.iter() { unsafe { gl.buffer_sub_data_u8_slice( glow::ARRAY_BUFFER, @@ -176,11 +138,12 @@ impl Pipeline { let mut last_vertex = 0; let mut last_index = 0; - for layer::Mesh { + for Mesh { buffers, origin, clip_bounds, - } in meshes + shader, + } in meshes.0.iter() { let transform = transformation * Transformation::translate(origin.x, origin.y); @@ -188,17 +151,6 @@ impl Pipeline { let clip_bounds = (*clip_bounds * scale_factor).snap(); unsafe { - if self.current_transform != transform { - let matrix: [f32; 16] = transform.into(); - gl.uniform_matrix_4_f32_slice( - Some(&self.transform_location), - false, - &matrix, - ); - - self.current_transform = transform; - } - gl.scissor( clip_bounds.x as i32, (target_height - (clip_bounds.y + clip_bounds.height)) @@ -207,6 +159,15 @@ impl Pipeline { clip_bounds.height as i32, ); + let t = if self.current_transform != transform { + self.current_transform = transform; + Some(transform) + } else { + None + }; + + self.use_with_shader(gl, shader, t); + gl.draw_elements_base_vertex( glow::TRIANGLES, buffers.indices.len() as i32, @@ -222,34 +183,79 @@ impl Pipeline { unsafe { gl.bind_vertex_array(None); - gl.use_program(None); gl.disable(glow::SCISSOR_TEST); gl.disable(glow::MULTISAMPLE); } } -} -#[repr(C)] -#[derive(Debug, Clone, Copy)] -struct Uniforms { - transform: [f32; 16], + fn use_with_shader( + &mut self, + gl: &glow::Context, + shader: &shader::Shader, + transform: Option<Transformation>, + ) { + match shader { + shader::Shader::Solid(color) => { + if let TriangleProgram::Solid(solid_program) = + &mut self.programs.solid + { + unsafe { gl.use_program(Some(solid_program.program)) } + solid_program.set_uniforms(gl, color, transform); + } + } + shader::Shader::Gradient(gradient) => { + if let TriangleProgram::Gradient(gradient_program) = + &mut self.programs.gradient + { + unsafe { gl.use_program(Some(gradient_program.program)) } + gradient_program.set_uniforms(gl, gradient, transform); + } + } + } + } } -unsafe impl bytemuck::Zeroable for Uniforms {} -unsafe impl bytemuck::Pod for Uniforms {} - -impl Default for Uniforms { - fn default() -> Self { - Self { - transform: *Transformation::identity().as_ref(), - } +/// A simple shader program. Uses [`triangle.vert`] for its vertex shader and only binds position +/// attribute location. +pub(super) fn simple_triangle_program( + gl: &glow::Context, + shader_version: &program::Version, + fragment_shader: &'static str, +) -> <glow::Context as HasContext>::Program { + unsafe { + let vertex_shader = Shader::vertex( + gl, + shader_version, + include_str!("shader/common/triangle.vert"), + ); + + let fragment_shader = + Shader::fragment(gl, shader_version, fragment_shader); + + program::create( + gl, + &[vertex_shader, fragment_shader], + &[(0, "i_Position")], + ) } } -impl From<Transformation> for Uniforms { - fn from(transformation: Transformation) -> Uniforms { - Self { - transform: transformation.into(), +pub(super) fn update_transform( + gl: &glow::Context, + program: <glow::Context as HasContext>::Program, + transform: Option<Transformation> +) { + if let Some(t) = transform { + let transform_location = + unsafe { gl.get_uniform_location(program, "u_Transform") } + .expect("Get transform location."); + + unsafe { + gl.uniform_matrix_4_f32_slice( + Some(&transform_location), + false, + t.as_ref(), + ); } } } diff --git a/glow/src/triangle/gradient.rs b/glow/src/triangle/gradient.rs new file mode 100644 index 00000000..d1b10d77 --- /dev/null +++ b/glow/src/triangle/gradient.rs @@ -0,0 +1,189 @@ +use crate::program::Version; +use crate::triangle::{simple_triangle_program, update_transform}; +use glow::{Context, HasContext, NativeProgram}; +use iced_graphics::gradient::Gradient; +use iced_graphics::widget::canvas::gradient::Linear; +use iced_graphics::Transformation; + +#[derive(Debug)] +pub(super) struct GradientProgram { + pub(super) program: <Context as HasContext>::Program, + pub(super) uniform_data: GradientUniformData, +} + +impl GradientProgram { + pub(super) fn new(gl: &Context, shader_version: &Version) -> Self { + let program = simple_triangle_program( + gl, + shader_version, + include_str!("../shader/common/gradient.frag"), + ); + + Self { + program, + uniform_data: GradientUniformData::new(gl, program), + } + } + + pub(super) fn set_uniforms<'a>( + &mut self, + gl: &Context, + gradient: &Gradient, + transform: Option<Transformation>, + ) { + update_transform(gl, self.program, transform); + + if &self.uniform_data.current_gradient != gradient { + match gradient { + Gradient::Linear(linear) => { + let gradient_start: [f32; 2] = (linear.start).into(); + let gradient_end: [f32; 2] = (linear.end).into(); + + unsafe { + gl.uniform_2_f32( + Some( + &self + .uniform_data + .uniform_locations + .gradient_start_location, + ), + gradient_start[0], + gradient_start[1], + ); + + gl.uniform_2_f32( + Some( + &self + .uniform_data + .uniform_locations + .gradient_end_location, + ), + gradient_end[0], + gradient_end[1], + ); + + gl.uniform_1_u32( + Some( + &self + .uniform_data + .uniform_locations + .color_stops_size_location, + ), + linear.color_stops.len() as u32, + ); + + for (index, stop) in + linear.color_stops.iter().enumerate() + { + gl.uniform_1_f32( + Some( + &self + .uniform_data + .uniform_locations + .color_stops_locations[index] + .offset, + ), + stop.offset, + ); + + gl.uniform_4_f32( + Some( + &self + .uniform_data + .uniform_locations + .color_stops_locations[index] + .color, + ), + stop.color.r, + stop.color.g, + stop.color.b, + stop.color.a, + ); + } + } + } + } + + self.uniform_data.current_gradient = gradient.clone(); + } + } +} + +#[derive(Debug)] +pub(super) struct GradientUniformData { + current_gradient: Gradient, + uniform_locations: GradientUniformLocations, +} + +#[derive(Debug)] +struct GradientUniformLocations { + gradient_start_location: <Context as HasContext>::UniformLocation, + gradient_end_location: <Context as HasContext>::UniformLocation, + color_stops_size_location: <Context as HasContext>::UniformLocation, + //currently the maximum number of stops is 64 due to needing to allocate the + //memory for the array of stops with a const value in GLSL + color_stops_locations: [ColorStopLocation; 64], +} + +#[derive(Copy, Debug, Clone)] +struct ColorStopLocation { + color: <Context as HasContext>::UniformLocation, + offset: <Context as HasContext>::UniformLocation, +} + +impl GradientUniformData { + fn new(gl: &Context, program: NativeProgram) -> Self { + let gradient_start_location = + unsafe { gl.get_uniform_location(program, "gradient_start") } + .expect("Gradient - Get gradient_start."); + + let gradient_end_location = + unsafe { gl.get_uniform_location(program, "gradient_end") } + .expect("Gradient - Get gradient_end."); + + let color_stops_size_location = + unsafe { gl.get_uniform_location(program, "color_stops_size") } + .expect("Gradient - Get color_stops_size."); + + let color_stops_locations: [ColorStopLocation; 64] = + core::array::from_fn(|index| { + let offset = unsafe { + gl.get_uniform_location( + program, + &format!("color_stop_offsets[{}]", index), + ) + } + .expect(&format!( + "Gradient - Color stop offset with index {}", + index + )); + + let color = unsafe { + gl.get_uniform_location( + program, + &format!("color_stop_colors[{}]", index), + ) + } + .expect(&format!( + "Gradient - Color stop colors with index {}", + index + )); + + ColorStopLocation { color, offset } + }); + + GradientUniformData { + current_gradient: Gradient::Linear(Linear { + start: Default::default(), + end: Default::default(), + color_stops: vec![], + }), + uniform_locations: GradientUniformLocations { + gradient_start_location, + gradient_end_location, + color_stops_size_location, + color_stops_locations, + }, + } + } +} diff --git a/glow/src/triangle/solid.rs b/glow/src/triangle/solid.rs new file mode 100644 index 00000000..3a33cea8 --- /dev/null +++ b/glow/src/triangle/solid.rs @@ -0,0 +1,67 @@ +use crate::program::Version; +use crate::triangle::{simple_triangle_program, update_transform}; +use crate::Color; +use glow::{Context, HasContext, NativeProgram}; +use iced_graphics::Transformation; + +#[derive(Debug)] +pub struct SolidProgram { + pub(crate) program: <Context as HasContext>::Program, + pub(crate) uniform_data: SolidUniformData, +} + +impl SolidProgram { + pub fn new(gl: &Context, shader_version: &Version) -> Self { + let program = simple_triangle_program( + gl, + shader_version, + include_str!("../shader/common/triangle.frag"), + ); + + Self { + program, + uniform_data: SolidUniformData::new(gl, program), + } + } + + pub fn set_uniforms<'a>( + &mut self, + gl: &Context, + color: &Color, + transform: Option<Transformation>, + ) { + update_transform(gl, self.program, transform); + + if &self.uniform_data.color != color { + unsafe { + gl.uniform_4_f32( + Some(&self.uniform_data.color_location), + color.r, + color.g, + color.b, + color.a, + ); + } + + self.uniform_data.color = *color; + } + } +} + +#[derive(Debug)] +pub(crate) struct SolidUniformData { + pub color: Color, + pub color_location: <Context as HasContext>::UniformLocation, +} + +impl SolidUniformData { + fn new(gl: &Context, program: NativeProgram) -> Self { + Self { + color: Color::TRANSPARENT, + color_location: unsafe { + gl.get_uniform_location(program, "color") + } + .expect("Solid - Color uniform location."), + } + } +} diff --git a/glow/src/window/compositor.rs b/glow/src/window/compositor.rs index f6afaa68..e9cf6015 100644 --- a/glow/src/window/compositor.rs +++ b/glow/src/window/compositor.rs @@ -26,8 +26,7 @@ impl<Theme> iced_graphics::window::GLCompositor for Compositor<Theme> { log::info!("{:#?}", settings); let version = gl.version(); - log::info!("Version: {:?}", version); - log::info!("Embedded: {}", version.is_embedded); + log::info!("OpenGL version: {:?} (Embedded: {}", version, version.is_embedded); let renderer = gl.get_parameter_string(glow::RENDERER); log::info!("Renderer: {}", renderer); |