src-tauri/src/print/macos.rs

@@ -1,12 +1,9 @@
 #![allow(dead_code)]
 
 use std::path::Path;
-use crate::print::{
-    PrintOptions, Printer, PrinterCapabilities,
-};
+use crate::print::PrintOptions;
 pub use crate::print::unix::{
-    get_printer_capabilities, get_printers, merge_printer_info, parse_lpoptions_l,
-    parse_lpstat_d, parse_lpstat_e, parse_lpstat_p,
+    get_printer_capabilities, get_printers,
 };
 
 /// Construct `lp` command line arguments for target printing on macOS with ColorSync bypass flags.

src-tauri/src/print/tests.rs

@@ -1,8 +1,8 @@
 #[cfg(test)]
 mod integration_tests {
     use crate::print::{
-        PrintOptions, Printer, PrinterCapabilities, PrinterDevModeStore, PrinterPaperSize,
-        PrinterTray,
+        PrintOptions, Printer, PrinterCapabilities, PrinterDevModeStore, PrinterMediaType,
+        PrinterPaperSize, PrinterTray,
     };
     use crate::print::unix::{build_lp_args, parse_lpstat_d, parse_lpstat_e, parse_lpstat_p, print_target};
 
@@ -46,6 +46,10 @@ mod integration_tests {
                     name: "Letter (8.5 x 11 in)".to_string(),
                 },
             ],
+            media_types: vec![PrinterMediaType {
+                id: "1".to_string(),
+                name: "Plain Paper".to_string(),
+            }],
             supports_orientation: true,
         };
 
@@ -53,6 +57,7 @@ mod integration_tests {
         assert!(json.contains("Auto Sheet Feeder"));
         assert!(json.contains("Rear Manual Feed"));
         assert!(json.contains("A4 (210 x 297 mm)"));
+        assert!(json.contains("Plain Paper"));
 
         let deserialized: PrinterCapabilities =
             serde_json::from_str(&json).expect("Failed to deserialize capabilities");
@@ -65,6 +70,7 @@ mod integration_tests {
             paper_source: Some(2),
             orientation: Some("landscape".to_string()),
             paper_size: Some("A4".to_string()),
+            media_type: Some("1".to_string()),
             ppd_uncorrected_passthrough: Some(false),
         };
 
@@ -74,6 +80,7 @@ mod integration_tests {
         assert_eq!(deserialized.paper_source, Some(2));
         assert_eq!(deserialized.orientation.as_deref(), Some("landscape"));
         assert_eq!(deserialized.paper_size.as_deref(), Some("A4"));
+        assert_eq!(deserialized.media_type.as_deref(), Some("1"));
     }
 
     #[test]
@@ -221,6 +228,7 @@ printer Custom_Queue unknown state\n\
             paper_source: Some(3),
             orientation: Some("landscape".to_string()),
             paper_size: None,
+            media_type: Some("4".to_string()),
             ppd_uncorrected_passthrough: None,
         };
 
@@ -235,6 +243,8 @@ printer Custom_Queue unknown state\n\
             assert_eq!((*p_work_devmode).Anonymous1.Anonymous1.dmDefaultSource, 3);
             // Verify orientation override
             assert_eq!((*p_work_devmode).Anonymous1.Anonymous1.dmOrientation, 2); // DMORIENT_LANDSCAPE = 2
+            // Verify media type override
+            assert_eq!((*p_work_devmode).dmMediaType, 4);
         }
 
         // Verify private OEM payload was NOT corrupted or overwritten
@@ -256,10 +266,8 @@ printer Custom_Queue unknown state\n\
         assert_eq!(args_raw[2], "-t");
         assert_eq!(args_raw[3], "ICCery Target - target_page_1.tif");
         assert_eq!(args_raw[4], "-o");
-        assert_eq!(args_raw[5], "raw");
-        assert_eq!(args_raw[6], "-o");
-        assert_eq!(args_raw[7], "AP_ColorMatchingMode=AP_ApplicationColorMatching");
-        assert_eq!(args_raw[8], path);
+        assert_eq!(args_raw[5], "AP_ColorMatchingMode=AP_ApplicationColorMatching");
+        assert_eq!(args_raw[6], path);
 
         // PPD uncorrected passthrough mode with options
         let opts = PrintOptions {
@@ -270,16 +278,10 @@ printer Custom_Queue unknown state\n\
         };
         let args_ppd = macos_build_lp_args(printer, path, Some(&opts));
         assert_eq!(args_ppd[4], "-o");
-        assert_eq!(args_ppd[5], "ColorModel=Gray");
-        assert_eq!(args_ppd[6], "-o");
-        assert_eq!(args_ppd[7], "cm-calibration");
-        assert_eq!(args_ppd[8], "-o");
-        assert_eq!(args_ppd[9], "AP_ColorMatchingMode=AP_ApplicationColorMatching");
-        assert_eq!(args_ppd[10], "-o");
-        assert_eq!(args_ppd[11], "orientation-requested=4");
-        assert_eq!(args_ppd[12], "-o");
-        assert_eq!(args_ppd[13], "PageSize=A4");
-        assert_eq!(args_ppd[14], path);
+        assert_eq!(args_ppd[5], "AP_ColorMatchingMode=AP_ApplicationColorMatching");
+        assert!(args_ppd.contains(&"orientation-requested=4".to_string()));
+        assert!(args_ppd.contains(&"PageSize=A4".to_string()));
+        assert_eq!(args_ppd.last().unwrap(), path);
     }
 
     #[test]

src-tauri/src/print/unix.rs

@@ -451,7 +451,7 @@ PageSize/Media Size: *A4 Letter Legal A3\n\
 InputSlot/Media Source: *Auto Upper Lower Rear Manual\n\
 Duplex/2-Sided Printing: *None DuplexNoTumble DuplexTumble\n\
 ";
-        let (trays, paper_sizes, media_types) = parse_lpoptions_l(sample);
+        let (trays, paper_sizes, _media_types) = parse_lpoptions_l(sample);
         assert_eq!(trays.len(), 5);
         assert_eq!(trays[0].name, "Auto");
         assert_eq!(trays[1].name, "Upper");
@@ -484,9 +484,14 @@ Duplex/2-Sided Printing: *None DuplexNoTumble DuplexTumble\n\
     #[test]
     fn test_build_lp_args_raw() {
         let args = build_lp_args("Epson-Stylus-SX420W", "/tmp/target.tif", None);
-        assert_eq!(args.len(), 5);
+        assert_eq!(args.len(), 7);
         assert_eq!(args[0], "-d");
-        assert_eq!(args[4], "/tmp/target.tif");
+        assert_eq!(args[1], "Epson-Stylus-SX420W");
+        assert_eq!(args[2], "-t");
+        assert_eq!(args[3], "ICCery Target - target.tif");
+        assert_eq!(args[4], "-o");
+        assert_eq!(args[5], "raw");
+        assert_eq!(args[6], "/tmp/target.tif");
     }
 
     #[test]

src-tauri/src/print/windows.rs

@@ -17,7 +17,8 @@ use windows::Win32::Graphics::Printing::{
 use windows::Win32::UI::WindowsAndMessaging::GetForegroundWindow;
 
 use crate::print::{
-    PrintOptions, Printer, PrinterCapabilities, PrinterDevModeStore, PrinterPaperSize, PrinterTray,
+    PrintOptions, Printer, PrinterCapabilities, PrinterDevModeStore, PrinterMediaType,
+    PrinterPaperSize, PrinterTray,
 };
 
 #[repr(C)]
@@ -54,11 +55,14 @@ const DM_ICMMETHOD: u32 = 0x00800000;
 const DMICMMETHOD_NONE: u32 = 1;
 const DMORIENT_PORTRAIT: i16 = 1;
 const DMORIENT_LANDSCAPE: i16 = 2;
+const DM_MEDIATYPE: u32 = 0x02000000;
 
 const DC_PAPERS: u16 = 2;
 const DC_BINS: u16 = 6;
 const DC_BINNAMES: u16 = 12;
 const DC_PAPERNAMES: u16 = 16;
+const DC_MEDIATYPENAMES: u16 = 34;
+const DC_MEDIATYPES: u16 = 35;
 const IDOK: i32 = 1;
 
 fn to_wide(s: &str) -> Vec<u16> {
@@ -262,9 +266,58 @@ pub fn get_printer_capabilities(printer_name: &str) -> Result<PrinterCapabilitie
             }
         }
 
+        // Query media types
+        let num_media = DeviceCapabilitiesW(
+            PCWSTR(printer_wide.as_ptr()),
+            PCWSTR::null(),
+            DC_MEDIATYPES,
+            std::ptr::null_mut(),
+            std::ptr::null(),
+        );
+
+        let mut media_types = Vec::new();
+        if num_media > 0 {
+            let mut media_ids = vec![0u32; num_media as usize];
+            let mut media_names_raw = vec![0u16; num_media as usize * 64];
+
+            let res_ids = DeviceCapabilitiesW(
+                PCWSTR(printer_wide.as_ptr()),
+                PCWSTR::null(),
+                DC_MEDIATYPES,
+                media_ids.as_mut_ptr() as *mut u16,
+                std::ptr::null(),
+            );
+
+            let res_names = DeviceCapabilitiesW(
+                PCWSTR(printer_wide.as_ptr()),
+                PCWSTR::null(),
+                DC_MEDIATYPENAMES,
+                media_names_raw.as_mut_ptr(),
+                std::ptr::null(),
+            );
+
+            if res_ids > 0 && res_names > 0 {
+                for i in 0..num_media as usize {
+                    let id = media_ids[i];
+                    let name_slice = &media_names_raw[i * 64..(i + 1) * 64];
+                    let name = extract_null_terminated_string(name_slice);
+                    let display_name = if name.is_empty() {
+                        format!("Media Type {}", id)
+                    } else {
+                        name
+                    };
+                    media_types.push(PrinterMediaType {
+                        id: id.to_string(),
+                        name: display_name,
+                    });
+                }
+            }
+        }
+
         Ok(PrinterCapabilities {
             trays,
             paper_sizes,
+            media_types,
             supports_orientation: true,
         })
     }
@@ -370,6 +423,13 @@ pub fn apply_print_options_to_devmode(
                     (*p_devmode).Anonymous1.Anonymous1.dmOrientation = DMORIENT_PORTRAIT;
                 }
             }
+
+            if let Some(ref media_type) = opts.media_type {
+                if let Ok(media_id) = media_type.parse::<u32>() {
+                    (*p_devmode).dmFields |= DEVMODE_FIELD_FLAGS(DM_MEDIATYPE);
+                    (*p_devmode).dmMediaType = media_id;
+                }
+            }
         }
     }
 }