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Replace show image crate (eclipse-ibeji#55)
* Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate * Replace show-image crate
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| // Copyright (c) Microsoft Corporation. | ||
| // Licensed under the MIT license. | ||
| // SPDX-License-Identifier: MIT | ||
|
|
||
| use image::{imageops::FilterType, DynamicImage}; | ||
| use sdl2::pixels::{Color, PixelFormatEnum}; | ||
| use sdl2::rect::Rect; | ||
| use sdl2::render::WindowCanvas; | ||
| use sdl2::surface::Surface; | ||
| use sdl2::Sdl; | ||
|
|
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| // This module is based on SDL2 (Simple DirectMedia Layer). It complements the sdl2 crate by providing | ||
| // methods that make it easier to render images. | ||
|
|
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| /// Create a canvas with an enclosing window. | ||
| /// | ||
| /// # Arguments | ||
| /// * `sdl_context` - The SDL context. | ||
| /// * `window_title` - The window's title. | ||
| /// * `window_width` - The window's width. | ||
| /// * `window_height` - The window's height. | ||
| pub fn create_canvas( | ||
| sdl_context: &mut Sdl, | ||
| window_title: &str, | ||
| window_width: u32, | ||
| window_height: u32, | ||
| ) -> Result<WindowCanvas, String> { | ||
| let video_subsystem = sdl_context.video()?; | ||
|
|
||
| let window = video_subsystem | ||
| .window(window_title, window_width, window_height) | ||
| .position_centered() | ||
| .allow_highdpi() | ||
| .build() | ||
| .map_err(|err| format!("{}", err))?; | ||
|
|
||
| let mut canvas = window.into_canvas().build().map_err(|err| format!("{}", err))?; | ||
|
|
||
| // Set the background color to black. | ||
| canvas.set_draw_color(Color::RGB(0, 0, 0)); | ||
|
|
||
| Ok(canvas) | ||
| } | ||
|
|
||
| /// Resize an image to fit inside a canvas. | ||
| /// | ||
| /// # Arguments | ||
| /// * `image` - The image that needs to be resized. | ||
| /// * `canvas` - The canvas that it needs to fit in. | ||
| pub fn resize_image_to_fit_in_canvas( | ||
| image: DynamicImage, | ||
| canvas: &WindowCanvas, | ||
| ) -> Result<DynamicImage, String> { | ||
| let (window_width, window_height): (u32, u32) = canvas.output_size()?; | ||
|
|
||
| let width_scale = window_width as f32 / image.width() as f32; | ||
| let height_scale = window_height as f32 / image.height() as f32; | ||
| let scale: f32 = height_scale.min(width_scale); | ||
|
|
||
| let resized_image_width = (scale * image.width() as f32) as u32; | ||
| let resized_image_height = (scale * image.height() as f32) as u32; | ||
|
|
||
| Ok(image.resize(resized_image_width, resized_image_height, FilterType::Triangle)) | ||
| } | ||
|
|
||
| /// Render an image to a canvas. | ||
| /// | ||
| /// # Arguments | ||
| /// * `image` - The image that we want to render. | ||
| /// * `canvas` - The canvas that will render the image. | ||
| pub fn render_image_to_canvas( | ||
| image: &DynamicImage, | ||
| canvas: &mut WindowCanvas, | ||
| ) -> Result<(), String> { | ||
| // Prepare the image for copying it to a surface. | ||
| let rgb_image = image.to_rgb8(); | ||
| let mut image_buffer = rgb_image.into_raw(); | ||
|
|
||
| let image_width = image.width(); | ||
| let image_height = image.height(); | ||
| // The pitch is the width of the texture times the size of a single pixel in bytes. | ||
| // Since we are using 24 bit pixels (RGB24), we need to mutiple the width by 3. | ||
| let image_pitch: u32 = image_width * 3; | ||
|
|
||
| let surface = Surface::from_data( | ||
| &mut image_buffer, | ||
| image_width, | ||
| image_height, | ||
| image_pitch, | ||
| PixelFormatEnum::RGB24, | ||
| ) | ||
| .map_err(|err| err.to_string())?; | ||
|
|
||
| let texture_creator = canvas.texture_creator(); | ||
| let texture = texture_creator | ||
| .create_texture_from_surface(surface) | ||
| .map_err(|err| format!("Failed to create texture from surface due to: {err}"))?; | ||
|
|
||
| // Render the image. | ||
| canvas.clear(); | ||
| canvas.copy(&texture, None, Rect::new(0, 0, image_width, image_height))?; | ||
| canvas.present(); | ||
|
|
||
| Ok(()) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -4,5 +4,6 @@ | |
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| pub mod constants; | ||
| pub mod consumer_config; | ||
| pub mod image_rendering; | ||
| pub mod provider_config; | ||
| pub mod utils; | ||
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