diff options
Diffstat (limited to 'glow/src/quad.rs')
| -rw-r--r-- | glow/src/quad.rs | 234 |
1 files changed, 28 insertions, 206 deletions
diff --git a/glow/src/quad.rs b/glow/src/quad.rs index a8fbb9e5..5438024c 100644 --- a/glow/src/quad.rs +++ b/glow/src/quad.rs @@ -1,77 +1,24 @@ -use crate::program; +mod compatibility; +mod core; + use crate::Transformation; use glow::HasContext; use iced_graphics::layer; use iced_native::Rectangle; -const MAX_INSTANCES: usize = 100_000; - #[derive(Debug)] -pub struct Pipeline { - program: <glow::Context as HasContext>::Program, - vertex_array: <glow::Context as HasContext>::VertexArray, - instances: <glow::Context as HasContext>::Buffer, - transform_location: <glow::Context as HasContext>::UniformLocation, - scale_location: <glow::Context as HasContext>::UniformLocation, - screen_height_location: <glow::Context as HasContext>::UniformLocation, - current_transform: Transformation, - current_scale: f32, - current_target_height: u32, +pub enum Pipeline { + Core(core::Pipeline), + Compatibility(compatibility::Pipeline), } impl Pipeline { pub fn new(gl: &glow::Context) -> Pipeline { - let program = unsafe { - program::create( - gl, - &[ - (glow::VERTEX_SHADER, include_str!("shader/quad.vert")), - (glow::FRAGMENT_SHADER, include_str!("shader/quad.frag")), - ], - ) - }; - - let transform_location = - unsafe { gl.get_uniform_location(program, "u_Transform") } - .expect("Get transform location"); - - let scale_location = - unsafe { gl.get_uniform_location(program, "u_Scale") } - .expect("Get scale location"); - - let screen_height_location = - unsafe { gl.get_uniform_location(program, "u_ScreenHeight") } - .expect("Get target height location"); - - unsafe { - gl.use_program(Some(program)); - - let matrix: [f32; 16] = Transformation::identity().into(); - gl.uniform_matrix_4_f32_slice( - Some(&transform_location), - false, - &matrix, - ); - - gl.uniform_1_f32(Some(&scale_location), 1.0); - gl.uniform_1_f32(Some(&screen_height_location), 0.0); - - gl.use_program(None); - } - - let (vertex_array, instances) = - unsafe { create_instance_buffer(gl, MAX_INSTANCES) }; - - Pipeline { - program, - vertex_array, - instances, - transform_location, - scale_location, - screen_height_location, - current_transform: Transformation::identity(), - current_scale: 1.0, - current_target_height: 0, + let version = gl.version(); + if version.is_embedded || version.major == 2 { + Pipeline::Compatibility(compatibility::Pipeline::new(gl)) + } else { + Pipeline::Core(core::Pipeline::new(gl)) } } @@ -84,152 +31,27 @@ impl Pipeline { scale: f32, bounds: Rectangle<u32>, ) { - unsafe { - gl.enable(glow::SCISSOR_TEST); - gl.scissor( - bounds.x as i32, - (target_height - (bounds.y + bounds.height)) as i32, - bounds.width as i32, - bounds.height as i32, - ); - - gl.use_program(Some(self.program)); - gl.bind_vertex_array(Some(self.vertex_array)); - gl.bind_buffer(glow::ARRAY_BUFFER, Some(self.instances)); - } - - if transformation != self.current_transform { - unsafe { - let matrix: [f32; 16] = transformation.into(); - gl.uniform_matrix_4_f32_slice( - Some(&self.transform_location), - false, - &matrix, - ); - - self.current_transform = transformation; - } - } - - if scale != self.current_scale { - unsafe { - gl.uniform_1_f32(Some(&self.scale_location), scale); - } - - self.current_scale = scale; - } - - if target_height != self.current_target_height { - unsafe { - gl.uniform_1_f32( - Some(&self.screen_height_location), - target_height as f32, + match self { + Pipeline::Core(pipeline) => { + pipeline.draw( + gl, + target_height, + instances, + transformation, + scale, + bounds, ); } - - self.current_target_height = target_height; - } - - let mut i = 0; - let total = instances.len(); - - while i < total { - let end = (i + MAX_INSTANCES).min(total); - let amount = end - i; - - unsafe { - gl.buffer_sub_data_u8_slice( - glow::ARRAY_BUFFER, - 0, - bytemuck::cast_slice(&instances[i..end]), - ); - - gl.draw_arrays_instanced( - glow::TRIANGLE_STRIP, - 0, - 4, - amount as i32, + Pipeline::Compatibility(pipeline) => { + pipeline.draw( + gl, + target_height, + instances, + transformation, + scale, + bounds, ); } - - i += MAX_INSTANCES; - } - - unsafe { - gl.bind_vertex_array(None); - gl.use_program(None); - gl.disable(glow::SCISSOR_TEST); } } } - -unsafe fn create_instance_buffer( - gl: &glow::Context, - size: usize, -) -> ( - <glow::Context as HasContext>::VertexArray, - <glow::Context as HasContext>::Buffer, -) { - let vertex_array = gl.create_vertex_array().expect("Create vertex array"); - let buffer = gl.create_buffer().expect("Create instance buffer"); - - gl.bind_vertex_array(Some(vertex_array)); - gl.bind_buffer(glow::ARRAY_BUFFER, Some(buffer)); - gl.buffer_data_size( - glow::ARRAY_BUFFER, - (size * std::mem::size_of::<layer::Quad>()) as i32, - glow::DYNAMIC_DRAW, - ); - - let stride = std::mem::size_of::<layer::Quad>() as i32; - - gl.enable_vertex_attrib_array(0); - gl.vertex_attrib_pointer_f32(0, 2, glow::FLOAT, false, stride, 0); - gl.vertex_attrib_divisor(0, 1); - - gl.enable_vertex_attrib_array(1); - gl.vertex_attrib_pointer_f32(1, 2, glow::FLOAT, false, stride, 4 * 2); - gl.vertex_attrib_divisor(1, 1); - - gl.enable_vertex_attrib_array(2); - gl.vertex_attrib_pointer_f32(2, 4, glow::FLOAT, false, stride, 4 * (2 + 2)); - gl.vertex_attrib_divisor(2, 1); - - gl.enable_vertex_attrib_array(3); - gl.vertex_attrib_pointer_f32( - 3, - 4, - glow::FLOAT, - false, - stride, - 4 * (2 + 2 + 4), - ); - gl.vertex_attrib_divisor(3, 1); - - gl.enable_vertex_attrib_array(4); - gl.vertex_attrib_pointer_f32( - 4, - 1, - glow::FLOAT, - false, - stride, - 4 * (2 + 2 + 4 + 4), - ); - gl.vertex_attrib_divisor(4, 1); - - gl.enable_vertex_attrib_array(5); - gl.vertex_attrib_pointer_f32( - 5, - 1, - glow::FLOAT, - false, - stride, - 4 * (2 + 2 + 4 + 4 + 1), - ); - gl.vertex_attrib_divisor(5, 1); - - gl.bind_vertex_array(None); - gl.bind_buffer(glow::ARRAY_BUFFER, None); - - (vertex_array, buffer) -} |