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GuinersGuinersgemini-code-assist[bot]iennaegericdong
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feat(genai): nano-banana-samples (#4184)
* adding samples * adding samples * adding samples * adding new samples * adding new samples * adding new samples * adding new samples * adding new samples * adding new samples * Update genai/image-generation/imggen-mmflash-locale-aware-with-txt.js Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> * Update genai/image-generation/imggen-mmflash-multiple-imgs-with-txt.js Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> * fixing samples * fixing samples * fixing samples * fix(genai): fix misspelled word based on suggestion from @gemini-code-assist[bot] Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> * sample update * model update * test fix * test fix * test fix * test fix * adding delay and retries for textgen tests * textgen-with-pdf test fix --------- Co-authored-by: Guiners <[email protected]> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> Co-authored-by: Jennifer Davis <[email protected]> Co-authored-by: Eric Dong <[email protected]>
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‎genai/image-generation/imggen-mmflash-edit-img-with-txt-img.js‎

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// Copyright 2025 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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'use strict';
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// [START googlegenaisdk_imggen_mmflash_edit_img_with_txt_img]
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const fs = require('fs');
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const {GoogleGenAI, Modality} = require('@google/genai');
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const GOOGLE_CLOUD_PROJECT = process.env.GOOGLE_CLOUD_PROJECT;
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const GOOGLE_CLOUD_LOCATION =
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process.env.GOOGLE_CLOUD_LOCATION || 'us-central1';
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const FILE_NAME = 'test-data/example-image-eiffel-tower.png';
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async function generateImage(
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projectId = GOOGLE_CLOUD_PROJECT,
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location = GOOGLE_CLOUD_LOCATION
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) {
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const client = new GoogleGenAI({
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vertexai: true,
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project: projectId,
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location: location,
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});
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const image = fs.readFileSync(FILE_NAME);
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const response = await client.models.generateContent({
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model: 'gemini-2.5-flash-image',
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contents: [image, 'Edit this image to make it look like a cartoon'],
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config: {
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responseModalities: [Modality.TEXT, Modality.IMAGE],
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},
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});
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for (const part of response.candidates[0].content.parts) {
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if (part.text) {
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console.log(`${part.text}`);
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} else if (part.inlineData) {
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const outputDir = 'output-folder';
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if (!fs.existsSync(outputDir)) {
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fs.mkdirSync(outputDir, {recursive: true});
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}
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const imageBytes = Buffer.from(part.inlineData.data, 'base64');
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const filename = `${outputDir}/bw-example-image.png`;
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fs.writeFileSync(filename, imageBytes);
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}
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}
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// Example response:
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// Okay, I will edit this image to give it a cartoonish style, with bolder outlines, simplified details, and more vibrant colors.
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return response;
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}
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// [END googlegenaisdk_imggen_mmflash_edit_img_with_txt_img]
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module.exports = {
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generateImage,
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};

‎genai/image-generation/imggen-mmflash-locale-aware-with-txt.js‎

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// Copyright 2025 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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'use strict';
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// [START googlegenaisdk_imggen_mmflash_locale_aware_with_txt]
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const fs = require('fs');
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const {GoogleGenAI, Modality} = require('@google/genai');
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const GOOGLE_CLOUD_PROJECT = process.env.GOOGLE_CLOUD_PROJECT;
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const GOOGLE_CLOUD_LOCATION =
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process.env.GOOGLE_CLOUD_LOCATION || 'us-central1';
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async function generateImage(
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projectId = GOOGLE_CLOUD_PROJECT,
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location = GOOGLE_CLOUD_LOCATION
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) {
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const client = new GoogleGenAI({
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vertexai: true,
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project: projectId,
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location: location,
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});
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const response = await client.models.generateContent({
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model: 'gemini-2.5-flash-image',
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contents: 'Generate a photo of a breakfast meal.',
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config: {
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responseModalities: [Modality.TEXT, Modality.IMAGE],
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},
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});
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console.log(response);
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for (const part of response.candidates[0].content.parts) {
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if (part.text) {
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console.log(`${part.text}`);
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} else if (part.inlineData) {
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const outputDir = 'output-folder';
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if (!fs.existsSync(outputDir)) {
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fs.mkdirSync(outputDir, {recursive: true});
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}
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const imageBytes = Buffer.from(part.inlineData.data, 'base64');
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const filename = `${outputDir}/example-breakfast-meal.png`;
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fs.writeFileSync(filename, imageBytes);
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}
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}
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// Example response:
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// Generates a photo of a vibrant and appetizing breakfast meal.
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// The scene will feature a white plate with golden-brown pancakes
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// stacked neatly, drizzled with rich maple syrup and ...
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return response;
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}
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// [END googlegenaisdk_imggen_mmflash_locale_aware_with_txt]
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module.exports = {
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generateImage,
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};

‎genai/image-generation/imggen-mmflash-multiple-imgs-with-txt.js‎

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// Copyright 2025 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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'use strict';
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// [START googlegenaisdk_imggen_mmflash_multiple_imgs_with_txt]
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const fs = require('fs');
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const {GoogleGenAI, Modality} = require('@google/genai');
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const GOOGLE_CLOUD_PROJECT = process.env.GOOGLE_CLOUD_PROJECT;
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const GOOGLE_CLOUD_LOCATION =
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process.env.GOOGLE_CLOUD_LOCATION || 'us-central1';
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async function generateImage(
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projectId = GOOGLE_CLOUD_PROJECT,
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location = GOOGLE_CLOUD_LOCATION
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) {
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const client = new GoogleGenAI({
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vertexai: true,
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project: projectId,
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location: location,
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});
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const response = await client.models.generateContent({
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model: 'gemini-2.5-flash-image',
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contents: 'Generate 3 images of a cat sitting on a chair.',
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config: {
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responseModalities: [Modality.TEXT, Modality.IMAGE],
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},
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});
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console.log(response);
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const generatedFileNames = [];
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let imageCounter = 1;
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for (const part of response.candidates[0].content.parts) {
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if (part.text) {
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console.log(part.text);
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} else if (part.inlineData) {
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const outputDir = 'output-folder';
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if (!fs.existsSync(outputDir)) {
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fs.mkdirSync(outputDir, {recursive: true});
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}
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const imageBytes = Buffer.from(part.inlineData.data, 'base64');
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const filename = `${outputDir}/example-cats-0${imageCounter}.png`;
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fs.writeFileSync(filename, imageBytes);
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generatedFileNames.push(filename);
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console.log(`Saved image: ${filename}`);
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imageCounter++;
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}
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}
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return generatedFileNames;
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}
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// Example response:
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// Image 1: A fluffy calico cat with striking green eyes is perched elegantly on a vintage wooden
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// chair with a woven seat. Sunlight streams through a nearby window, casting soft shadows and
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// highlighting the cat's fur.
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//
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// Image 2: A sleek black cat with intense yellow eyes is sitting upright on a modern, minimalist
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// white chair. The background is a plain grey wall, putting the focus entirely on the feline's
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// graceful posture.
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//
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// Image 3: A ginger tabby cat with playful amber eyes is comfortably curled up asleep on a plush,
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// oversized armchair upholstered in a soft, floral fabric. A corner of a cozy living room with a
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// [END googlegenaisdk_imggen_mmflash_multiple_imgs_with_txt]
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module.exports = {
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generateImage,
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};

‎genai/image-generation/imggen-mmflash-txt-and-img-with-txt.js‎

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// Copyright 2025 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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'use strict';
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// [START googlegenaisdk_imggen_mmflash_txt_and_img_with_txt]
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const fs = require('fs');
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const {GoogleGenAI, Modality} = require('@google/genai');
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const GOOGLE_CLOUD_PROJECT = process.env.GOOGLE_CLOUD_PROJECT;
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const GOOGLE_CLOUD_LOCATION =
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process.env.GOOGLE_CLOUD_LOCATION || 'us-central1';
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async function savePaellaRecipe(response) {
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const parts = response.candidates[0].content.parts;
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let mdText = '';
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const outputDir = 'output-folder';
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for (let i = 0; i < parts.length; i++) {
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const part = parts[i];
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if (part.text) {
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mdText += part.text + '\n';
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} else if (part.inlineData) {
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if (!fs.existsSync(outputDir)) {
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fs.mkdirSync(outputDir, {recursive: true});
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}
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const imageBytes = Buffer.from(part.inlineData.data, 'base64');
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const imagePath = `example-image-${i + 1}.png`;
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const saveImagePath = `${outputDir}/${imagePath}`;
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fs.writeFileSync(saveImagePath, imageBytes);
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mdText += `![image](./${imagePath})\n`;
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}
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}
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const mdFile = `${outputDir}/paella-recipe.md`;
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fs.writeFileSync(mdFile, mdText);
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console.log(`Saved recipe to: ${mdFile}`);
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}
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async function generateImage(
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projectId = GOOGLE_CLOUD_PROJECT,
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location = GOOGLE_CLOUD_LOCATION
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) {
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const client = new GoogleGenAI({
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vertexai: true,
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project: projectId,
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location: location,
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});
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const response = await client.models.generateContent({
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model: 'gemini-2.5-flash-image',
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contents:
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'Generate an illustrated recipe for a paella. Create images to go alongside the text as you generate the recipe',
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config: {
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responseModalities: [Modality.TEXT, Modality.IMAGE],
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},
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});
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console.log(response);
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await savePaellaRecipe(response);
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return response;
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}
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// Example response:
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// A markdown page for a Paella recipe(`paella-recipe.md`) has been generated.
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// It includes detailed steps and several images illustrating the cooking process.
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// [END googlegenaisdk_imggen_mmflash_txt_and_img_with_txt]
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module.exports = {
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generateImage,
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};

‎genai/image-generation/imggen-mmflash-with-txt.js‎

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const GOOGLE_CLOUD_LOCATION =
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process.env.GOOGLE_CLOUD_LOCATION || 'us-central1';
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async function generateContent(
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async function generateImage(
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projectId = GOOGLE_CLOUD_PROJECT,
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location = GOOGLE_CLOUD_LOCATION
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) {
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const generatedFileNames = [];
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let imageIndex = 0;
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for await (const chunk of response) {
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const text = chunk.text;
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const data = chunk.data;
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if (text) {
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console.debug(text);
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} else if (data) {
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const fileName = `generate_content_streaming_image_${imageIndex++}.png`;
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const outputDir = 'output-folder';
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if (!fs.existsSync(outputDir)) {
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fs.mkdirSync(outputDir, {recursive: true});
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}
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const fileName = `${outputDir}/generate_content_streaming_image_${imageIndex++}.png`;
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console.debug(`Writing response image to file: ${fileName}.`);
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try {
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fs.writeFileSync(fileName, data);
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}
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}
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// Example response:
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// I will generate an image of the Eiffel Tower at night, with a vibrant display of
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// colorful fireworks exploding in the dark sky behind it. The tower will be
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// illuminated, standing tall as the focal point of the scene, with the bursts of
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// light from the fireworks creating a festive atmosphere.
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return generatedFileNames;
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}
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// [END googlegenaisdk_imggen_mmflash_with_txt]
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module.exports = {
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generateContent,
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generateImage,
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};

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