From 3e99f5a75e14455aa75ca3a1dc7d08bd3e6f55fd Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Tue, 21 Apr 2026 23:12:52 +0300
Subject: u7: wire documented config knobs into runtime

---
 internal/image/gemini.go | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

(limited to 'internal/image/gemini.go')

diff --git a/internal/image/gemini.go b/internal/image/gemini.go
index 05a2e0e..bd418d5 100644
--- a/internal/image/gemini.go
+++ b/internal/image/gemini.go
@@ -28,9 +28,10 @@ const (
 
 // GeminiConfig holds the settings needed to build a Gemini-backed image provider.
 type GeminiConfig struct {
-	APIKey    string
-	Model     string
-	TextModel string
+	APIKey      string
+	Model       string
+	TextModel   string
+	AspectRatio string
 }
 
 // GeminiProvider implements ImageProvider for Google Gemini image generation.
@@ -104,6 +105,9 @@ func (c *GeminiProvider) Search(ctx context.Context, opts *SearchOptions) ([]Sea
 	}
 
 	aspectRatio := geminiAspectRatio
+	if c.config != nil && strings.TrimSpace(c.config.AspectRatio) != "" {
+		aspectRatio = strings.TrimSpace(c.config.AspectRatio)
+	}
 	if opts.AspectRatio != "" {
 		aspectRatio = opts.AspectRatio
 	}
@@ -164,13 +168,26 @@ func (c *GeminiProvider) IsAvailable() error {
 
 // GenerateImage renders the first generated image to outputFile.
 func (c *GeminiProvider) GenerateImage(ctx context.Context, prompt, outputFile string) error {
-	return c.GenerateImageWithReferences(ctx, prompt, outputFile, nil)
+	return c.GenerateImageWithAspectRatio(ctx, prompt, outputFile, "")
+}
+
+// GenerateImageWithAspectRatio renders the first generated image to outputFile
+// using the configured aspect ratio or the supplied override.
+func (c *GeminiProvider) GenerateImageWithAspectRatio(ctx context.Context, prompt, outputFile string, aspectRatio string) error {
+	return c.GenerateImageWithReferencesAndAspectRatio(ctx, prompt, outputFile, nil, aspectRatio)
 }
 
 // GenerateImageWithReferences renders the first generated image to outputFile,
 // optionally conditioning the model on prior page images so comic pages stay
 // visually consistent across the full PDF.
 func (c *GeminiProvider) GenerateImageWithReferences(ctx context.Context, prompt, outputFile string, refs [][]byte) error {
+	return c.GenerateImageWithReferencesAndAspectRatio(ctx, prompt, outputFile, refs, "")
+}
+
+// GenerateImageWithReferencesAndAspectRatio renders the first generated image
+// to outputFile, optionally conditioning on reference images and overriding the
+// aspect ratio.
+func (c *GeminiProvider) GenerateImageWithReferencesAndAspectRatio(ctx context.Context, prompt, outputFile string, refs [][]byte, aspectRatio string) error {
 	if c == nil {
 		return fmt.Errorf("image provider is nil")
 	}
@@ -187,6 +204,9 @@ func (c *GeminiProvider) GenerateImageWithReferences(ctx context.Context, prompt
 	if len(refs) > 0 {
 		opts.ReferenceImages = refs
 	}
+	if strings.TrimSpace(aspectRatio) != "" {
+		opts.AspectRatio = strings.TrimSpace(aspectRatio)
+	}
 	results, err := c.Search(ctx, opts)
 	if err != nil {
 		return err
-- 
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