diff options
Diffstat (limited to 'gfx/wr/webrender/src/renderer/debug.rs')
| -rw-r--r-- | gfx/wr/webrender/src/renderer/debug.rs | 415 |
1 files changed, 415 insertions, 0 deletions
diff --git a/gfx/wr/webrender/src/renderer/debug.rs b/gfx/wr/webrender/src/renderer/debug.rs new file mode 100644 index 0000000000..7e16d15d76 --- /dev/null +++ b/gfx/wr/webrender/src/renderer/debug.rs @@ -0,0 +1,415 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +use api::{ColorU, ImageFormat, ImageBufferKind}; +use api::units::*; +use crate::debug_font_data; +use crate::device::{Device, Program, Texture, TextureSlot, VertexDescriptor, ShaderError, VAO}; +use crate::device::{TextureFilter, VertexAttribute, VertexAttributeKind, VertexUsageHint}; +use euclid::{Point2D, Rect, Size2D, Transform3D, default}; +use crate::internal_types::Swizzle; +use std::f32; + +#[derive(Debug, Copy, Clone)] +enum DebugSampler { + Font, +} + +impl Into<TextureSlot> for DebugSampler { + fn into(self) -> TextureSlot { + match self { + DebugSampler::Font => TextureSlot(0), + } + } +} + +const DESC_FONT: VertexDescriptor = VertexDescriptor { + vertex_attributes: &[ + VertexAttribute { + name: "aPosition", + count: 2, + kind: VertexAttributeKind::F32, + }, + VertexAttribute { + name: "aColor", + count: 4, + kind: VertexAttributeKind::U8Norm, + }, + VertexAttribute { + name: "aColorTexCoord", + count: 2, + kind: VertexAttributeKind::F32, + }, + ], + instance_attributes: &[], +}; + +const DESC_COLOR: VertexDescriptor = VertexDescriptor { + vertex_attributes: &[ + VertexAttribute { + name: "aPosition", + count: 2, + kind: VertexAttributeKind::F32, + }, + VertexAttribute { + name: "aColor", + count: 4, + kind: VertexAttributeKind::U8Norm, + }, + ], + instance_attributes: &[], +}; + +#[repr(C)] +pub struct DebugFontVertex { + pub x: f32, + pub y: f32, + pub color: ColorU, + pub u: f32, + pub v: f32, +} + +impl DebugFontVertex { + pub fn new(x: f32, y: f32, u: f32, v: f32, color: ColorU) -> DebugFontVertex { + DebugFontVertex { x, y, color, u, v } + } +} + +#[repr(C)] +pub struct DebugColorVertex { + pub x: f32, + pub y: f32, + pub color: ColorU, +} + +impl DebugColorVertex { + pub fn new(x: f32, y: f32, color: ColorU) -> DebugColorVertex { + DebugColorVertex { x, y, color } + } +} + +pub struct DebugRenderer { + font_vertices: Vec<DebugFontVertex>, + font_indices: Vec<u32>, + font_program: Program, + font_vao: VAO, + font_texture: Texture, + + tri_vertices: Vec<DebugColorVertex>, + tri_indices: Vec<u32>, + tri_vao: VAO, + line_vertices: Vec<DebugColorVertex>, + line_vao: VAO, + color_program: Program, +} + +impl DebugRenderer { + pub fn new(device: &mut Device) -> Result<Self, ShaderError> { + let font_program = device.create_program_linked( + "debug_font", + &[], + &DESC_FONT, + )?; + device.bind_program(&font_program); + device.bind_shader_samplers(&font_program, &[("sColor0", DebugSampler::Font)]); + + let color_program = device.create_program_linked( + "debug_color", + &[], + &DESC_COLOR, + )?; + + let font_vao = device.create_vao(&DESC_FONT, 1); + let line_vao = device.create_vao(&DESC_COLOR, 1); + let tri_vao = device.create_vao(&DESC_COLOR, 1); + + let font_texture = device.create_texture( + ImageBufferKind::Texture2D, + ImageFormat::R8, + debug_font_data::BMP_WIDTH, + debug_font_data::BMP_HEIGHT, + TextureFilter::Linear, + None, + ); + device.upload_texture_immediate( + &font_texture, + &debug_font_data::FONT_BITMAP + ); + + Ok(DebugRenderer { + font_vertices: Vec::new(), + font_indices: Vec::new(), + line_vertices: Vec::new(), + tri_vao, + tri_vertices: Vec::new(), + tri_indices: Vec::new(), + font_program, + color_program, + font_vao, + line_vao, + font_texture, + }) + } + + pub fn deinit(self, device: &mut Device) { + device.delete_texture(self.font_texture); + device.delete_program(self.font_program); + device.delete_program(self.color_program); + device.delete_vao(self.tri_vao); + device.delete_vao(self.line_vao); + device.delete_vao(self.font_vao); + } + + pub fn line_height(&self) -> f32 { + debug_font_data::FONT_SIZE as f32 * 1.1 + } + + /// Draws a line of text at the provided starting coordinates. + /// + /// If |bounds| is specified, glyphs outside the bounds are discarded. + /// + /// Y-coordinates is relative to screen top, along with everything else in + /// this file. + pub fn add_text( + &mut self, + x: f32, + y: f32, + text: &str, + color: ColorU, + bounds: Option<DeviceRect>, + ) -> default::Rect<f32> { + let mut x_start = x; + let ipw = 1.0 / debug_font_data::BMP_WIDTH as f32; + let iph = 1.0 / debug_font_data::BMP_HEIGHT as f32; + + let mut min_x = f32::MAX; + let mut max_x = -f32::MAX; + let mut min_y = f32::MAX; + let mut max_y = -f32::MAX; + + for c in text.chars() { + let c = c as usize - debug_font_data::FIRST_GLYPH_INDEX as usize; + if c < debug_font_data::GLYPHS.len() { + let glyph = &debug_font_data::GLYPHS[c]; + + let x0 = (x_start + glyph.xo + 0.5).floor(); + let y0 = (y + glyph.yo + 0.5).floor(); + + let x1 = x0 + glyph.x1 as f32 - glyph.x0 as f32; + let y1 = y0 + glyph.y1 as f32 - glyph.y0 as f32; + + // If either corner of the glyph will end up out of bounds, drop it. + if let Some(b) = bounds { + let rect = DeviceRect { + min: DevicePoint::new(x0, y0), + max: DevicePoint::new(x1, y1), + }; + if !b.contains_box(&rect) { + continue; + } + } + + let s0 = glyph.x0 as f32 * ipw; + let t0 = glyph.y0 as f32 * iph; + let s1 = glyph.x1 as f32 * ipw; + let t1 = glyph.y1 as f32 * iph; + + x_start += glyph.xa; + + let vertex_count = self.font_vertices.len() as u32; + + self.font_vertices + .push(DebugFontVertex::new(x0, y0, s0, t0, color)); + self.font_vertices + .push(DebugFontVertex::new(x1, y0, s1, t0, color)); + self.font_vertices + .push(DebugFontVertex::new(x0, y1, s0, t1, color)); + self.font_vertices + .push(DebugFontVertex::new(x1, y1, s1, t1, color)); + + self.font_indices.push(vertex_count + 0); + self.font_indices.push(vertex_count + 1); + self.font_indices.push(vertex_count + 2); + self.font_indices.push(vertex_count + 2); + self.font_indices.push(vertex_count + 1); + self.font_indices.push(vertex_count + 3); + + min_x = min_x.min(x0); + max_x = max_x.max(x1); + min_y = min_y.min(y0); + max_y = max_y.max(y1); + } + } + + Rect::new( + Point2D::new(min_x, min_y), + Size2D::new(max_x - min_x, max_y - min_y), + ) + } + + pub fn add_quad( + &mut self, + x0: f32, + y0: f32, + x1: f32, + y1: f32, + color_top: ColorU, + color_bottom: ColorU, + ) { + let vertex_count = self.tri_vertices.len() as u32; + + self.tri_vertices + .push(DebugColorVertex::new(x0, y0, color_top)); + self.tri_vertices + .push(DebugColorVertex::new(x1, y0, color_top)); + self.tri_vertices + .push(DebugColorVertex::new(x0, y1, color_bottom)); + self.tri_vertices + .push(DebugColorVertex::new(x1, y1, color_bottom)); + + self.tri_indices.push(vertex_count + 0); + self.tri_indices.push(vertex_count + 1); + self.tri_indices.push(vertex_count + 2); + self.tri_indices.push(vertex_count + 2); + self.tri_indices.push(vertex_count + 1); + self.tri_indices.push(vertex_count + 3); + } + + #[allow(dead_code)] + pub fn add_line(&mut self, x0: i32, y0: i32, color0: ColorU, x1: i32, y1: i32, color1: ColorU) { + self.line_vertices + .push(DebugColorVertex::new(x0 as f32, y0 as f32, color0)); + self.line_vertices + .push(DebugColorVertex::new(x1 as f32, y1 as f32, color1)); + } + + + pub fn add_rect(&mut self, rect: &DeviceIntRect, color: ColorU) { + let p0 = rect.min; + let p1 = rect.max; + self.add_line(p0.x, p0.y, color, p1.x, p0.y, color); + self.add_line(p1.x, p0.y, color, p1.x, p1.y, color); + self.add_line(p1.x, p1.y, color, p0.x, p1.y, color); + self.add_line(p0.x, p1.y, color, p0.x, p0.y, color); + } + + pub fn render( + &mut self, + device: &mut Device, + viewport_size: Option<DeviceIntSize>, + scale: f32, + surface_origin_is_top_left: bool, + ) { + if let Some(viewport_size) = viewport_size { + device.disable_depth(); + device.set_blend(true); + device.set_blend_mode_premultiplied_alpha(); + + let (bottom, top) = if surface_origin_is_top_left { + (0.0, viewport_size.height as f32 * scale) + } else { + (viewport_size.height as f32 * scale, 0.0) + }; + + let projection = Transform3D::ortho( + 0.0, + viewport_size.width as f32 * scale, + bottom, + top, + device.ortho_near_plane(), + device.ortho_far_plane(), + ); + + // Triangles + if !self.tri_vertices.is_empty() { + device.bind_program(&self.color_program); + device.set_uniforms(&self.color_program, &projection); + device.bind_vao(&self.tri_vao); + device.update_vao_indices(&self.tri_vao, &self.tri_indices, VertexUsageHint::Dynamic); + device.update_vao_main_vertices( + &self.tri_vao, + &self.tri_vertices, + VertexUsageHint::Dynamic, + ); + device.draw_triangles_u32(0, self.tri_indices.len() as i32); + } + + // Lines + if !self.line_vertices.is_empty() { + device.bind_program(&self.color_program); + device.set_uniforms(&self.color_program, &projection); + device.bind_vao(&self.line_vao); + device.update_vao_main_vertices( + &self.line_vao, + &self.line_vertices, + VertexUsageHint::Dynamic, + ); + device.draw_nonindexed_lines(0, self.line_vertices.len() as i32); + } + + // Glyph + if !self.font_indices.is_empty() { + device.bind_program(&self.font_program); + device.set_uniforms(&self.font_program, &projection); + device.bind_texture(DebugSampler::Font, &self.font_texture, Swizzle::default()); + device.bind_vao(&self.font_vao); + device.update_vao_indices(&self.font_vao, &self.font_indices, VertexUsageHint::Dynamic); + device.update_vao_main_vertices( + &self.font_vao, + &self.font_vertices, + VertexUsageHint::Dynamic, + ); + device.draw_triangles_u32(0, self.font_indices.len() as i32); + } + } + + self.font_indices.clear(); + self.font_vertices.clear(); + self.line_vertices.clear(); + self.tri_vertices.clear(); + self.tri_indices.clear(); + } +} + +pub struct LazyInitializedDebugRenderer { + debug_renderer: Option<DebugRenderer>, + failed: bool, +} + +impl LazyInitializedDebugRenderer { + pub fn new() -> Self { + Self { + debug_renderer: None, + failed: false, + } + } + + pub fn get_mut<'a>(&'a mut self, device: &mut Device) -> Option<&'a mut DebugRenderer> { + if self.failed { + return None; + } + if self.debug_renderer.is_none() { + match DebugRenderer::new(device) { + Ok(renderer) => { self.debug_renderer = Some(renderer); } + Err(_) => { + // The shader compilation code already logs errors. + self.failed = true; + } + } + } + + self.debug_renderer.as_mut() + } + + /// Returns mut ref to `debug::DebugRenderer` if one already exists, otherwise returns `None`. + pub fn try_get_mut<'a>(&'a mut self) -> Option<&'a mut DebugRenderer> { + self.debug_renderer.as_mut() + } + + pub fn deinit(self, device: &mut Device) { + if let Some(debug_renderer) = self.debug_renderer { + debug_renderer.deinit(device); + } + } +} |