runmat_plot/export/
image.rs

1//! Image export (PNG, JPEG, etc.)
2//!
3//! Static image export functionality.
4
5use std::path::Path;
6use wgpu::{Device, Queue, TextureFormat};
7
8/// High-performance image exporter using GPU rendering
9pub struct ImageExporter {
10    /// GPU device for rendering
11    #[allow(dead_code)]
12    device: Device,
13    /// Command queue
14    #[allow(dead_code)]
15    queue: Queue,
16    /// Surface format
17    #[allow(dead_code)]
18    format: TextureFormat,
19    /// Export settings
20    settings: ImageExportSettings,
21}
22
23/// Image export configuration
24#[derive(Debug, Clone)]
25pub struct ImageExportSettings {
26    /// Output width in pixels
27    pub width: u32,
28    /// Output height in pixels  
29    pub height: u32,
30    /// Samples for anti-aliasing (1, 4, 8, 16)
31    pub samples: u32,
32    /// Background color [R, G, B, A] (0.0-1.0)
33    pub background_color: [f32; 4],
34    /// Image quality (0.0-1.0) for lossy formats
35    pub quality: f32,
36    /// Include metadata in output
37    pub include_metadata: bool,
38}
39
40/// Supported image formats
41#[derive(Debug, Clone, Copy, PartialEq)]
42pub enum ImageFormat {
43    Png,
44    Jpeg,
45    WebP,
46    Bmp,
47}
48
49impl Default for ImageExportSettings {
50    fn default() -> Self {
51        Self {
52            width: 800,
53            height: 600,
54            samples: 4,                             // 4x MSAA
55            background_color: [1.0, 1.0, 1.0, 1.0], // White background
56            quality: 0.95,
57            include_metadata: true,
58        }
59    }
60}
61
62impl ImageExporter {
63    /// Create a new image exporter with GPU acceleration
64    pub async fn new() -> Result<Self, String> {
65        Self::with_settings(ImageExportSettings::default()).await
66    }
67
68    /// Create exporter with custom settings
69    pub async fn with_settings(settings: ImageExportSettings) -> Result<Self, String> {
70        // Initialize GPU context for headless rendering
71        let instance = wgpu::Instance::new(wgpu::InstanceDescriptor::default());
72
73        let adapter = instance
74            .request_adapter(&wgpu::RequestAdapterOptions {
75                power_preference: wgpu::PowerPreference::HighPerformance,
76                compatible_surface: None,
77                force_fallback_adapter: false,
78            })
79            .await
80            .ok_or("Failed to find suitable GPU adapter")?;
81
82        let (device, queue) = adapter
83            .request_device(&wgpu::DeviceDescriptor::default(), None)
84            .await
85            .map_err(|e| format!("Failed to create device: {e}"))?;
86
87        Ok(Self {
88            device,
89            queue,
90            format: TextureFormat::Rgba8UnormSrgb,
91            settings,
92        })
93    }
94
95    /// Export figure to PNG file (placeholder implementation)
96    pub async fn export_png<P: AsRef<Path>>(
97        &self,
98        _figure: &mut crate::plots::Figure,
99        path: P,
100    ) -> Result<(), String> {
101        // TODO: Implement actual rendering pipeline integration
102        let placeholder_data =
103            vec![255u8; (self.settings.width * self.settings.height * 4) as usize];
104        self.save_png(&placeholder_data, path).await
105    }
106
107    /// Save raw RGBA data as PNG
108    async fn save_png<P: AsRef<Path>>(&self, data: &[u8], path: P) -> Result<(), String> {
109        use image::{ImageBuffer, Rgba};
110
111        let image =
112            ImageBuffer::<Rgba<u8>, _>::from_raw(self.settings.width, self.settings.height, data)
113                .ok_or("Failed to create image buffer")?;
114
115        image
116            .save(path)
117            .map_err(|e| format!("Failed to save PNG: {e}"))?;
118
119        println!("DEBUG: PNG export completed successfully");
120        Ok(())
121    }
122
123    /// Update export settings
124    pub fn set_settings(&mut self, settings: ImageExportSettings) {
125        self.settings = settings;
126    }
127
128    /// Get current export settings
129    pub fn settings(&self) -> &ImageExportSettings {
130        &self.settings
131    }
132}
runmat_plot/export/image.rs

runmat_plot/export/
image.rs
