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add support for resetting the imgui renderer's texture map

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Gered 2023-05-26 11:11:27 -04:00
parent 457aa757cf
commit f6ef1ee22e
1 changed files with 25 additions and 17 deletions
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42
ggdt_imgui/src/renderer.rs
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@ -2,6 +2,26 @@ use ggdt::graphics::{BlendFunction, RgbaBitmap, RgbaPixelFormat, RGBA};
use ggdt::math::{Rect, Vector2}; use ggdt::math::{Rect, Vector2};
use imgui::internal::RawWrapper; use imgui::internal::RawWrapper;
fn create_default_texture_map(context: &mut imgui::Context) -> imgui::Textures<RgbaBitmap> {
let mut texture_map = imgui::Textures::new();
// set up a bitmap with the imgui font atlas texture pixels and register a bitmap->texture mapping for it
// with imgui
let mut font = context.fonts();
let mut font_atlas_texture = font.build_rgba32_texture();
font.tex_id = texture_map.insert(
RgbaBitmap::from_bytes(
font_atlas_texture.width,
font_atlas_texture.height,
RgbaPixelFormat::RGBA,
&mut font_atlas_texture.data,
)
.unwrap(),
);
texture_map
}
#[derive(Debug)] #[derive(Debug)]
pub struct Renderer { pub struct Renderer {
pub texture_map: imgui::Textures<RgbaBitmap>, pub texture_map: imgui::Textures<RgbaBitmap>,
@ -9,23 +29,7 @@ pub struct Renderer {
impl Renderer { impl Renderer {
pub fn new(context: &mut imgui::Context) -> Self { pub fn new(context: &mut imgui::Context) -> Self {
let mut texture_map = imgui::Textures::new(); Renderer { texture_map: create_default_texture_map(context) }
// set up a bitmap with the imgui font atlas texture pixels and register a bitmap->texture mapping for it
// with imgui
let mut font = context.fonts();
let mut font_atlas_texture = font.build_rgba32_texture();
font.tex_id = texture_map.insert(
RgbaBitmap::from_bytes(
font_atlas_texture.width,
font_atlas_texture.height,
RgbaPixelFormat::RGBA,
&mut font_atlas_texture.data,
)
.unwrap(),
);
Renderer { texture_map }
} }
pub fn render(&mut self, draw_data: &imgui::DrawData, dest: &mut RgbaBitmap) { pub fn render(&mut self, draw_data: &imgui::DrawData, dest: &mut RgbaBitmap) {
@ -81,4 +85,8 @@ impl Renderer {
} }
dest.set_clip_region(&original_clip_rect); dest.set_clip_region(&original_clip_rect);
} }
pub fn reset_textures(&mut self, context: &mut imgui::Context) {
self.texture_map = create_default_texture_map(context);
}
} }