282 lines
9.3 KiB
Rust
282 lines
9.3 KiB
Rust
use axum::http::StatusCode;
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use platform_image::generated_asset_sheets::{
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GeneratedAssetSheetAlphaOptions, GeneratedAssetSheetError, GeneratedAssetSheetKeyColor,
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remove_generated_asset_sheet_green_screen_background_bytes,
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};
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use serde_json::json;
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use crate::{http_error::AppError, openai_image_generation::DownloadedOpenAiImage};
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#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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pub(crate) struct EditorScreenBackgroundColor {
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pub(crate) label: &'static str,
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pub(crate) hex: &'static str,
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pub(crate) red: u8,
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pub(crate) green: u8,
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pub(crate) blue: u8,
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}
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pub(crate) const EDITOR_SCREEN_BACKGROUND_COLORS: [EditorScreenBackgroundColor; 12] = [
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EditorScreenBackgroundColor {
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label: "浅雾蓝",
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hex: "#CFEFFF",
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red: 207,
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green: 239,
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blue: 255,
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},
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EditorScreenBackgroundColor {
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label: "浅钢蓝",
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hex: "#B0C2E0",
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red: 176,
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green: 194,
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blue: 224,
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},
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EditorScreenBackgroundColor {
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label: "暖浅桃色",
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hex: "#FFD6C2",
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red: 255,
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green: 214,
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blue: 194,
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},
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EditorScreenBackgroundColor {
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label: "淡薰衣草紫",
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hex: "#E6D8FF",
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red: 230,
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green: 216,
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blue: 255,
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},
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EditorScreenBackgroundColor {
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label: "浅粉灰",
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hex: "#F4D8E8",
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red: 244,
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green: 216,
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blue: 232,
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},
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EditorScreenBackgroundColor {
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label: "中度天蓝",
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hex: "#7FB3FF",
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red: 127,
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green: 179,
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blue: 255,
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},
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EditorScreenBackgroundColor {
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label: "浅柠黄",
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hex: "#FFF2A8",
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red: 255,
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green: 242,
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blue: 168,
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},
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EditorScreenBackgroundColor {
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label: "淡薄荷绿",
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hex: "#CFFFE1",
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red: 207,
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green: 255,
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blue: 225,
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},
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EditorScreenBackgroundColor {
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label: "浅中性灰",
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hex: "#D8DEE8",
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red: 216,
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green: 222,
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blue: 232,
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},
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EditorScreenBackgroundColor {
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label: "淡灰紫",
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hex: "#D8D2E8",
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red: 216,
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green: 210,
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blue: 232,
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},
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EditorScreenBackgroundColor {
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label: "高对比浅青",
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hex: "#A8F7F0",
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red: 168,
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green: 247,
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blue: 240,
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},
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// 中明度低饱和柔雾绿：填补安全弧的绿色段。浅粉彩绿（淡薄荷绿）会被露肤角色的皮肤规则剔除，
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// 故绿色改用中明度以过 RGB 分离（Rule 3）；色相远离皮肤橙调，过色调投影（Rule 2）。
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EditorScreenBackgroundColor {
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label: "灰竹绿",
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hex: "#A0BBA0",
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red: 160,
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green: 187,
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blue: 160,
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},
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];
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pub(crate) fn default_editor_screen_background_color() -> EditorScreenBackgroundColor {
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EDITOR_SCREEN_BACKGROUND_COLORS[0]
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}
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pub(crate) fn parse_editor_screen_background_color(
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value: Option<&str>,
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) -> Result<EditorScreenBackgroundColor, AppError> {
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let Some(value) = value.map(str::trim).filter(|value| !value.is_empty()) else {
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return Ok(default_editor_screen_background_color());
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};
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let normalized_value = value.to_ascii_uppercase();
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EDITOR_SCREEN_BACKGROUND_COLORS
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.iter()
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.copied()
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.find(|option| option.hex == normalized_value)
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.ok_or_else(|| {
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AppError::from_status(StatusCode::BAD_REQUEST).with_details(json!({
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"provider": "editor-screen-background",
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"message": "screenColor 必须是编辑器支持的纯色背景色。",
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"allowed": EDITOR_SCREEN_BACKGROUND_COLORS
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.iter()
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.map(|option| option.hex)
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.collect::<Vec<_>>(),
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}))
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})
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}
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pub(crate) const EDITOR_GREEN_SCREEN_BACKGROUND_GUARDRAILS: &str =
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"纯色背景必须平整无纹理、无渐变、无阴影、无地面、无环境、无道具";
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pub(crate) const EDITOR_GREEN_SCREEN_ASSET_GUARDRAILS: &str =
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"素材主体及其配色必须与背景色明显区分，不要出现与背景色相同或相近的描边、底板、投影或反光";
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pub(crate) const EDITOR_GREEN_SCREEN_CHARACTER_GUARDRAILS: &str =
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"角色主体及其服饰、道具的颜色必须与背景色明显区分，不得带与背景色相同或相近的描边、投影或反光";
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fn editor_screen_background_color_prompt(color: EditorScreenBackgroundColor) -> String {
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format!(
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"单一纯色背景 {} {} / RGB({},{},{})",
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color.label, color.hex, color.red, color.green, color.blue
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)
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}
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pub(crate) fn editor_green_screen_asset_prompt_clause(
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color: EditorScreenBackgroundColor,
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) -> String {
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format!(
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"背景必须是{}，且{}，方便扣除背景；{}",
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editor_screen_background_color_prompt(color),
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EDITOR_GREEN_SCREEN_BACKGROUND_GUARDRAILS,
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EDITOR_GREEN_SCREEN_ASSET_GUARDRAILS
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)
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}
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pub(crate) fn editor_green_screen_character_prompt_clause(
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color: EditorScreenBackgroundColor,
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) -> String {
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format!(
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"背景固定为{}，只作为抠像底色；{}；{}",
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editor_screen_background_color_prompt(color),
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EDITOR_GREEN_SCREEN_BACKGROUND_GUARDRAILS,
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EDITOR_GREEN_SCREEN_CHARACTER_GUARDRAILS
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)
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}
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pub(crate) fn editor_ui_design_asset_extraction_prompt(
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color: EditorScreenBackgroundColor,
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) -> String {
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format!(
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"仅提取被红色框框选的素材并整理成spritesheet，图集背景必须使用{}。{}，方便后续扣除背景；{}。",
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editor_screen_background_color_prompt(color),
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EDITOR_GREEN_SCREEN_BACKGROUND_GUARDRAILS,
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EDITOR_GREEN_SCREEN_ASSET_GUARDRAILS
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)
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}
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pub(crate) fn remove_editor_generated_green_screen_background(
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image: &DownloadedOpenAiImage,
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color: EditorScreenBackgroundColor,
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) -> Result<DownloadedOpenAiImage, AppError> {
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let key_color = GeneratedAssetSheetKeyColor {
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red: color.red,
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green: color.green,
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blue: color.blue,
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};
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let bytes = remove_generated_asset_sheet_green_screen_background_bytes(
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image.bytes.as_slice(),
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GeneratedAssetSheetAlphaOptions {
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key_color,
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remove_near_white_background: key_color.is_green_screen(),
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remove_disconnected_hard_key_background: true,
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remove_muted_green_screen_background: key_color.is_green_screen(),
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detect_internal_holes: true,
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internal_hole_min_pixels: 16,
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},
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)
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.map_err(map_editor_green_screen_error)?;
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Ok(DownloadedOpenAiImage {
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bytes,
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mime_type: "image/png".to_string(),
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extension: "png".to_string(),
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})
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}
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fn map_editor_green_screen_error(error: GeneratedAssetSheetError) -> AppError {
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let status = match error {
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GeneratedAssetSheetError::DecodeImage { .. } => StatusCode::BAD_GATEWAY,
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GeneratedAssetSheetError::InvalidRequest { .. }
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| GeneratedAssetSheetError::RawConnectedComponentLimitExceeded { .. }
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| GeneratedAssetSheetError::OutputSliceLimitExceeded { .. }
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| GeneratedAssetSheetError::MergeCandidateLimitExceeded { .. } => StatusCode::BAD_REQUEST,
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GeneratedAssetSheetError::EncodeImage { .. }
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| GeneratedAssetSheetError::BuildHttpClient { .. }
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| GeneratedAssetSheetError::Oss(_) => StatusCode::INTERNAL_SERVER_ERROR,
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};
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AppError::from_status(status).with_details(json!({
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"provider": "editor-green-screen",
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"message": error.message(),
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}))
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use std::io::Cursor;
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use image::{DynamicImage, ImageFormat, Rgba, RgbaImage};
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#[test]
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fn editor_green_screen_postprocess_turns_selected_background_transparent() {
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let mut source = RgbaImage::from_pixel(3, 3, Rgba([207, 239, 255, 255]));
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source.put_pixel(1, 1, Rgba([240, 40, 40, 255]));
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let mut bytes = Vec::new();
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DynamicImage::ImageRgba8(source)
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.write_to(&mut Cursor::new(&mut bytes), ImageFormat::Png)
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.expect("test PNG should encode");
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let output = remove_editor_generated_green_screen_background(
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&DownloadedOpenAiImage {
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bytes,
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mime_type: "image/png".to_string(),
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extension: "png".to_string(),
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},
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default_editor_screen_background_color(),
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)
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.expect("screen background should be removed");
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let image = image::load_from_memory(output.bytes.as_slice())
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.expect("output PNG should decode")
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.to_rgba8();
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assert_eq!(image.get_pixel(0, 0).0[3], 0);
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assert_eq!(image.get_pixel(1, 1).0[3], 255);
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}
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#[test]
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fn editor_screen_background_color_parser_uses_default_and_rejects_unknown() {
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assert_eq!(
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parse_editor_screen_background_color(None).expect("default should parse"),
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default_editor_screen_background_color()
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);
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assert_eq!(
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parse_editor_screen_background_color(Some("#ffd6c2"))
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.expect("known lowercase hex should parse")
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.label,
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"暖浅桃色"
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);
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assert_eq!(
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parse_editor_screen_background_color(Some("#a8f7f0"))
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.expect("new high-contrast cyan should parse")
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.label,
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"高对比浅青"
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);
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assert!(parse_editor_screen_background_color(Some("#00FF00")).is_err());
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}
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}
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