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M4.69: Targa export at 16, 24 or 32 bits per pixel

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document.export {format: "tga"} writes uncompressed true-colour Targa files
through the raster export path (resolution, background, anti-aliasing,
artboard ranges): depth 16 (5-5-5 with a one-bit alpha), 24 (flattened on
white) or 32 (8-bit alpha), rows bottom-up, with the version 2 footer.
Export As offers it with the tgaOptions dialog (Depth).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
bflatastic
2026-10-05 15:24:51 +07:00
co-authored by Claude Opus 5.5
parent f2fc8782c7
commit b578c32f4d
16 changed files with 224 additions and 26 deletions
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crates/engine/src/cmd/fileio/encode.rs
+9 -5
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@@ -12,7 +12,7 @@ use vectorcraft_render::AntiAlias;
use vectorcraft_render::encode::jpeg::{self, JpegOptions};
use vectorcraft_render::encode::quantize::{Dither, PaletteOptions, Reduction};
use vectorcraft_render::encode::tiff::{ByteOrder, TiffOptions};
use vectorcraft_render::encode::{RasterExportOptions, RasterFormat, bmp};
use vectorcraft_render::encode::{RasterExportOptions, RasterFormat, bmp, tga};
use super::super::*;
use super::Format;
@@ -165,7 +165,7 @@ struct RasterOptions {
lossless: Option<bool>,
lzw: Option<bool>,
byte_order: Option<String>,
/// BMP bits per pixel.
/// BMP and Targa bits per pixel.
depth: Option<u8>,
/// BMP layout: `windows` or `os2`.
file_format: Option<String>,
@@ -227,6 +227,7 @@ impl RasterOptions {
top_down: self.flip_rows.unwrap_or(false),
gray: color_model == jpeg::ColorModel::Gray,
},
tga: tga::TgaOptions { depth: self.depth.unwrap_or(24) },
})
}
}
@@ -240,13 +241,15 @@ fn bmp_layout(s: &str) -> Option<bool> {
}
}
/// Refuse options `format` can't write together: BMP depths and layouts, and colour models (BMP
/// is RGB or grey).
/// Refuse options `format` can't write together: BMP and Targa depths and layouts, and colour
/// models (BMP is RGB or grey, Targa RGB).
fn check_options(format: RasterFormat, o: &RasterExportOptions) -> Result<()> {
let model = o.jpeg.color_model;
let r = match format {
RasterFormat::Bmp if model == jpeg::ColorModel::Cmyk => Err("BMP files are RGB or grayscale: colorModel rgb or gray".to_string()),
RasterFormat::Tga if model != jpeg::ColorModel::Rgb => Err("Targa files are RGB: colorModel rgb".to_string()),
RasterFormat::Bmp => o.bmp.check(),
RasterFormat::Tga => o.tga.check(),
_ => Ok(()),
};
r.map_err(|e| bad(C, e))
@@ -376,7 +379,7 @@ pub fn encode_all(doc: &Document, format: &str, p: &Value) -> Result<Encoded> {
let (bytes, warnings) = super::pdf::encode(C, doc, p)?;
return Ok(Encoded { warnings, ..Encoded::one(bytes) });
}
"png" | "jpg" | "webp" | "gif" | "png8" | "tiff" | "bmp" => {
"png" | "jpg" | "webp" | "gif" | "png8" | "tiff" | "bmp" | "tga" => {
let o: RasterOptions = options(f, p)?;
// New Document → Background Contents: White makes the export opaque, unless `background`
// says otherwise (JPEG has no alpha: white either way).
@@ -390,6 +393,7 @@ pub fn encode_all(doc: &Document, format: &str, p: &Value) -> Result<Encoded> {
"png8" => RasterFormat::Png8,
"tiff" => RasterFormat::Tiff,
"bmp" => RasterFormat::Bmp,
"tga" => RasterFormat::Tga,
_ => RasterFormat::WebP,
};
check_options(format, &settings)?;