diff options
Diffstat (limited to 'glow/src/triangle.rs')
| -rw-r--r-- | glow/src/triangle.rs | 126 |
1 files changed, 41 insertions, 85 deletions
diff --git a/glow/src/triangle.rs b/glow/src/triangle.rs index 85d873fe..f16f8af4 100644 --- a/glow/src/triangle.rs +++ b/glow/src/triangle.rs @@ -2,23 +2,22 @@ mod gradient; mod solid; -use crate::program::{self, Shader}; -use crate::Transformation; +use crate::{program, Transformation}; use glow::HasContext; -use iced_graphics::layer::{Mesh, Meshes}; +use iced_graphics::layer::{attribute_count_of, Mesh}; 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}; +use shader::Shader; #[derive(Debug)] pub(crate) struct Pipeline { vertex_array: <glow::Context as HasContext>::VertexArray, vertices: Buffer<Vertex2D>, indices: Buffer<u32>, - current_transform: Transformation, programs: TrianglePrograms, } @@ -68,7 +67,6 @@ impl Pipeline { vertex_array, vertices, indices, - current_transform: Transformation::identity(), programs: TrianglePrograms { solid: SolidProgram::new(gl, shader_version), gradient: GradientProgram::new(gl, shader_version), @@ -78,7 +76,7 @@ impl Pipeline { pub fn draw( &mut self, - meshes: &Meshes<'_>, + meshes: &[Mesh<'_>], gl: &glow::Context, target_height: u32, transformation: Transformation, @@ -90,8 +88,8 @@ impl Pipeline { gl.bind_vertex_array(Some(self.vertex_array)) } - //count the total number of vertices & indices we need to handle for all meshes - let (total_vertices, total_indices) = meshes.attribute_count(); + //count the total amount of vertices & indices we need to handle + let (total_vertices, total_indices) = attribute_count_of(meshes); // Then we ensure the current attribute buffers are big enough, resizing if necessary unsafe { @@ -100,25 +98,25 @@ impl Pipeline { } // We upload all the vertices and indices upfront - let mut last_vertex = 0; - let mut last_index = 0; + let mut vertex_offset = 0; + let mut index_offset = 0; - for Mesh { buffers, .. } in meshes.0.iter() { + for mesh in meshes { unsafe { gl.buffer_sub_data_u8_slice( glow::ARRAY_BUFFER, - (last_vertex * std::mem::size_of::<Vertex2D>()) as i32, - bytemuck::cast_slice(&buffers.vertices), + (vertex_offset * std::mem::size_of::<Vertex2D>()) as i32, + bytemuck::cast_slice(&mesh.buffers.vertices), ); gl.buffer_sub_data_u8_slice( glow::ELEMENT_ARRAY_BUFFER, - (last_index * std::mem::size_of::<u32>()) as i32, - bytemuck::cast_slice(&buffers.indices), + (index_offset * std::mem::size_of::<u32>()) as i32, + bytemuck::cast_slice(&mesh.buffers.indices), ); - last_vertex += buffers.vertices.len(); - last_index += buffers.indices.len(); + vertex_offset += mesh.buffers.vertices.len(); + index_offset += mesh.buffers.indices.len(); } } @@ -126,22 +124,11 @@ impl Pipeline { let mut last_vertex = 0; let mut last_index = 0; - for (index, Mesh { - buffers, - origin, - clip_bounds, - shader, - }) in meshes.0.iter().enumerate() - { - let transform = - transformation * Transformation::translate(origin.x, origin.y); - - if index == 0 { - //set initial transform uniform for both programs - self.programs.set_transforms(gl, transform); - } + for mesh in meshes { + let transform = transformation + * Transformation::translate(mesh.origin.x, mesh.origin.y); - let clip_bounds = (*clip_bounds * scale_factor).snap(); + let clip_bounds = (mesh.clip_bounds * scale_factor).snap(); unsafe { gl.scissor( @@ -152,25 +139,25 @@ 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); + match mesh.shader { + Shader::Solid(color) => { + self.programs.solid.use_program(gl, &color, &transform); + } + Shader::Gradient(gradient) => { + self.programs.gradient.use_program(gl, &gradient, &transform); + } + } gl.draw_elements_base_vertex( glow::TRIANGLES, - buffers.indices.len() as i32, + mesh.buffers.indices.len() as i32, glow::UNSIGNED_INT, (last_index * std::mem::size_of::<u32>()) as i32, last_vertex as i32, ); - last_vertex += buffers.vertices.len(); - last_index += buffers.indices.len(); + last_vertex += mesh.buffers.vertices.len(); + last_index += mesh.buffers.indices.len(); } } @@ -180,31 +167,6 @@ impl Pipeline { gl.disable(glow::MULTISAMPLE); } } - - fn use_with_shader( - &mut self, - gl: &glow::Context, - shader: &shader::Shader, - transform: Option<Transformation>, - ) { - match shader { - shader::Shader::Solid(color) => { - unsafe { gl.use_program(Some(self.programs.solid.program)) } - self.programs.solid.set_uniforms(gl, color, transform); - } - shader::Shader::Gradient(gradient) => { - unsafe { gl.use_program(Some(self.programs.gradient.program)) } - self.programs.gradient.set_uniforms(gl, gradient, transform); - } - } - } -} - -impl TrianglePrograms { - pub fn set_transforms(&self, gl: &glow::Context, transform: Transformation) { - update_transform(gl, self.solid.program, Some(transform)); - update_transform(gl, self.gradient.program, Some(transform)); - } } /// A simple shader program. Uses [`triangle.vert`] for its vertex shader and only binds position @@ -215,14 +177,14 @@ pub(super) fn simple_triangle_program( fragment_shader: &'static str, ) -> <glow::Context as HasContext>::Program { unsafe { - let vertex_shader = Shader::vertex( + let vertex_shader = program::Shader::vertex( gl, shader_version, include_str!("shader/common/triangle.vert"), ); let fragment_shader = - Shader::fragment(gl, shader_version, fragment_shader); + program::Shader::fragment(gl, shader_version, fragment_shader); program::create( gl, @@ -232,23 +194,17 @@ pub(super) fn simple_triangle_program( } } -pub(super) fn update_transform( +pub fn set_transform( gl: &glow::Context, - program: <glow::Context as HasContext>::Program, - transform: Option<Transformation> + location: <glow::Context as HasContext>::UniformLocation, + transform: 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(), - ); - } + unsafe { + gl.uniform_matrix_4_f32_slice( + Some(&location), + false, + transform.as_ref() + ); } } |