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Reuse Vec allocations in TextRenderer

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Héctor Ramón Jiménez 2024-03-29 23:46:42 +01:00 • committed by Josh Groves
commit 4f24305ac5
1 changed files with 10 additions and 6 deletions
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16
src/text_render.rs
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@ -20,6 +20,8 @@ pub struct TextRenderer {
vertices_to_render: u32, vertices_to_render: u32,
pipeline: Arc<RenderPipeline>, pipeline: Arc<RenderPipeline>,
bind_group: wgpu::BindGroup, bind_group: wgpu::BindGroup,
glyph_vertices: Vec<GlyphToRender>,
glyph_indices: Vec<u32>,
} }
impl TextRenderer { impl TextRenderer {
@ -82,6 +84,8 @@ impl TextRenderer {
vertices_to_render: 0, vertices_to_render: 0,
pipeline, pipeline,
bind_group, bind_group,
glyph_vertices: Vec::new(),
glyph_indices: Vec::new(),
} }
} }
@ -107,8 +111,8 @@ impl TextRenderer {
}); });
} }
let mut glyph_vertices: Vec<GlyphToRender> = Vec::new(); self.glyph_vertices.clear();
let mut glyph_indices: Vec<u32> = Vec::new(); self.glyph_indices.clear();
let mut glyphs_added = 0; let mut glyphs_added = 0;
for text_area in text_areas { for text_area in text_areas {
@ -291,7 +295,7 @@ impl TextRenderer {
let depth = metadata_to_depth(glyph.metadata); let depth = metadata_to_depth(glyph.metadata);
glyph_vertices.extend( self.glyph_vertices.extend(
iter::repeat(GlyphToRender { iter::repeat(GlyphToRender {
pos: [x, y], pos: [x, y],
dim: [width as u16, height as u16], dim: [width as u16, height as u16],
@ -310,7 +314,7 @@ impl TextRenderer {
); );
let start = 4 * glyphs_added as u32; let start = 4 * glyphs_added as u32;
glyph_indices.extend([ self.glyph_indices.extend([
start, start,
start + 1, start + 1,
start + 2, start + 2,
@ -332,7 +336,7 @@ impl TextRenderer {
return Ok(()); return Ok(());
} }
let vertices = glyph_vertices.as_slice(); let vertices = self.glyph_vertices.as_slice();
let vertices_raw = unsafe { let vertices_raw = unsafe {
slice::from_raw_parts( slice::from_raw_parts(
vertices as *const _ as *const u8, vertices as *const _ as *const u8,
@ -356,7 +360,7 @@ impl TextRenderer {
self.vertex_buffer_size = buffer_size; self.vertex_buffer_size = buffer_size;
} }
let indices = glyph_indices.as_slice(); let indices = self.glyph_indices.as_slice();
let indices_raw = unsafe { let indices_raw = unsafe {
slice::from_raw_parts( slice::from_raw_parts(
indices as *const _ as *const u8, indices as *const _ as *const u8,