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Fix support for Imagine v1.0 base64 content #75

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Merged
kzu merged 1 commit into from
Feb 20, 2026
Merged

Fix support for Imagine v1.0 base64 content #75

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24 changes: 12 additions & 12 deletions src/xAI.Tests/ImageGeneratorTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@ public class ImageGeneratorTests(ITestOutputHelper output)
public async Task GenerateImage_WithPrompt_ReturnsImageContent()
{
var imageGenerator = new GrokClient(Configuration["XAI_API_KEY"]!)
.AsIImageGenerator("grok-imagine-image-beta");
.AsIImageGenerator("grok-imagine-image");

var request = new ImageGenerationRequest("A cat sitting on a tree branch");
var options = new ImageGenerationOptions
Expand All @@ -38,7 +38,7 @@ public async Task GenerateImage_WithPrompt_ReturnsImageContent()
public async Task GenerateImage_WithEditsToPreviousImage()
{
var imageGenerator = new GrokClient(Configuration["XAI_API_KEY"]!)
.AsIImageGenerator("grok-imagine-image-beta");
.AsIImageGenerator("grok-imagine-image");

var request = new ImageGenerationRequest("A cat sitting on a tree branch");
var options = new ImageGenerationOptions
Expand All @@ -55,7 +55,7 @@ public async Task GenerateImage_WithEditsToPreviousImage()
Assert.Single(response.Contents);
var image = Assert.IsType<UriContent>(response.Contents.First());
// media type in options is ignored and you always get the same jpg
Assert.Equal("image/jpg", image.MediaType);
Assert.Equal("image/jpeg", image.MediaType);
output.WriteLine($"Generated image URL: {image.Uri}");

var edit = await imageGenerator.GenerateAsync(new ImageGenerationRequest("Edit provided image by adding a batman mask", [image]), options);
Expand All @@ -65,7 +65,7 @@ public async Task GenerateImage_WithEditsToPreviousImage()
Assert.Single(edit.Contents);
image = Assert.IsType<UriContent>(edit.Contents.First());
// media type in options is ignored and you always get the same jpg
Assert.Equal("image/jpg", image.MediaType);
Assert.Equal("image/jpeg", image.MediaType);

output.WriteLine($"Edited image URL: {image.Uri}");
}
Expand All @@ -74,7 +74,7 @@ public async Task GenerateImage_WithEditsToPreviousImage()
public async Task GenerateImage_WithBase64Response_ReturnsDataContent()
{
var imageGenerator = new GrokClient(Configuration["XAI_API_KEY"]!)
.AsIImageGenerator("grok-imagine-image-beta");
.AsIImageGenerator("grok-imagine-image");

var request = new ImageGenerationRequest("A sunset over mountains");
var options = new ImageGenerationOptions
Expand Down Expand Up @@ -103,7 +103,7 @@ public async Task GenerateImage_WithBase64Response_ReturnsDataContent()
public async Task GenerateImage_DefaultsToUriContent()
{
var imageGenerator = new GrokClient(Configuration["XAI_API_KEY"]!)
.AsIImageGenerator("grok-imagine-image-beta");
.AsIImageGenerator("grok-imagine-image");

var request = new ImageGenerationRequest("A sunset over mountains");
var response = await imageGenerator.GenerateAsync(request);
Expand All @@ -119,7 +119,7 @@ public async Task GenerateImage_DefaultsToUriContent()
public async Task GenerateMultipleImages_ReturnsCorrectCount()
{
var imageGenerator = new GrokClient(Configuration["XAI_API_KEY"]!)
.AsIImageGenerator("grok-2-image");
.AsIImageGenerator("grok-imagine-image");

var request = new ImageGenerationRequest("A robot reading a book");
var options = new ImageGenerationOptions
Expand All @@ -145,7 +145,7 @@ public async Task GenerateMultipleImages_ReturnsCorrectCount()
public async Task GenerateImage_ResponseContainsRawRepresentation()
{
var imageGenerator = new GrokClient(Configuration["XAI_API_KEY"]!)
.AsIImageGenerator("grok-2-image");
.AsIImageGenerator("grok-imagine-image");

var request = new ImageGenerationRequest("A futuristic cityscape");
var options = new ImageGenerationOptions
Expand All @@ -168,7 +168,7 @@ public async Task GenerateImage_ResponseContainsRawRepresentation()
public async Task GenerateImage_WithNullRequest_ThrowsArgumentNullException()
{
var imageGenerator = new GrokClient("test-api-key")
.AsIImageGenerator("grok-2-image");
.AsIImageGenerator("grok-imagine-image");

await Assert.ThrowsAsync<ArgumentNullException>(
async () => await imageGenerator.GenerateAsync(null!, null));
Expand All @@ -178,7 +178,7 @@ await Assert.ThrowsAsync<ArgumentNullException>(
public async Task GenerateImage_WithNullPrompt_ThrowsArgumentNullException()
{
var imageGenerator = new GrokClient("test-api-key")
.AsIImageGenerator("grok-2-image");
.AsIImageGenerator("grok-imagine-image");

var request = new ImageGenerationRequest(null!);

Expand All @@ -190,12 +190,12 @@ await Assert.ThrowsAsync<ArgumentNullException>(
public void GetService_ReturnsImageGeneratorMetadata()
{
var imageGenerator = new GrokClient("test-api-key")
.AsIImageGenerator("grok-2-image");
.AsIImageGenerator("grok-imagine-image");

var metadata = imageGenerator.GetService<ImageGeneratorMetadata>();

Assert.NotNull(metadata);
Assert.Equal("xai", metadata.ProviderName);
Assert.Equal("grok-2-image", metadata.DefaultModelId);
Assert.Equal("grok-imagine-image", metadata.DefaultModelId);
}
}
16 changes: 13 additions & 3 deletions src/xAI/GrokImageGenerator.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -125,9 +125,19 @@ static ImageGenerationResponse ToImageGenerationResponse(ImageResponse response)
{
case GeneratedImage.ImageOneofCase.Base64:
{
// We assume JPEG since there's no way to get the actual content type.
var imageBytes = Convert.FromBase64String(image.Base64);
contents.Add(new DataContent(imageBytes, contentType));
try
{
// RTW grok-imagine-image uses full data URI, so
// this first try should work.
contents.Add(new DataContent(image.Base64));
}
catch (Exception)
{
// Fallback to attemping to parse as raw base64 string from beta and grok2 model.
// We assume JPEG since there's no way to get the actual content type.
var imageBytes = Convert.FromBase64String(image.Base64);
contents.Add(new DataContent(imageBytes, contentType));
}
break;
}
case GeneratedImage.ImageOneofCase.Url:
Expand Down