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nyx/sd.ts

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TypeScript
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2023-09-04 16:55:48 +00:00
export async function txt2img(
apiUrl: string,
params: Partial<SdRequest>,
onProgress?: (progress: SdProgressResponse) => void,
signal?: AbortSignal,
): Promise<SdResponse> {
let response: Response | undefined;
let error: unknown;
fetch(new URL("sdapi/v1/txt2img", apiUrl), {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(params),
}).then(
(resp) => (response = resp),
(err) => (error = err),
);
try {
while (true) {
await new Promise((resolve) => setTimeout(resolve, 3000));
const progressRequest = await fetch(new URL("sdapi/v1/progress", apiUrl));
if (progressRequest.ok) {
const progress = (await progressRequest.json()) as SdProgressResponse;
onProgress?.(progress);
}
if (response != null) {
if (response.ok) {
const result = (await response.json()) as SdResponse;
return result;
} else {
throw new Error(`Request failed: ${response.status} ${response.statusText}`);
}
}
if (error != null) {
throw error;
}
signal?.throwIfAborted();
}
} finally {
if (!response && !error) {
await fetch(new URL("sdapi/v1/interrupt", apiUrl), { method: "POST" });
}
}
}
export interface SdRequest {
denoising_strength: number;
prompt: string;
seed: number;
sampler_name: unknown;
batch_size: number;
n_iter: number;
steps: number;
cfg_scale: number;
width: number;
height: number;
negative_prompt: string;
send_images: boolean;
save_images: boolean;
}
export interface SdResponse {
images: string[];
parameters: SdRequest;
/** Contains serialized JSON */
info: string;
}
export interface SdProgressResponse {
progress: number;
eta_relative: number;
state: SdProgressState;
/** base64 encoded preview */
current_image: string | null;
textinfo: string | null;
}
export interface SdProgressState {
skipped: boolean;
interrupted: boolean;
job: string;
job_count: number;
job_timestamp: string;
job_no: number;
sampling_step: number;
sampling_steps: number;
}