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fix: enforce 1.55 aspect ratio (750x1163px) for zine pages 

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Jeff Emmett 2026-01-22 01:19:23 +01:00
parent 8dc3145e5c
commit ef5152bb4f
2 changed files with 10 additions and 12 deletions
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13
app/api/zine/generate-page/route.ts
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@ -2,11 +2,10 @@ import { NextRequest, NextResponse } from "next/server";
import { getZine, saveZine, savePageImage } from "@/lib/storage"; import { getZine, saveZine, savePageImage } from "@/lib/storage";
import type { PageOutline } from "@/lib/gemini"; import type { PageOutline } from "@/lib/gemini";
// Zine page dimensions: 1/8 of US Letter (8.5" x 11") at 300 DPI // Zine page dimensions: 1/8 of US Letter at 300 DPI
// Page size: 2.75" x 4.25", with 0.125" margin on each side // Aspect ratio: 1.55 (height / width)
// Content area: 2.5" x 4.0" const ZINE_PAGE_WIDTH = 750;
const ZINE_PAGE_WIDTH = 750; // 2.5 inches * 300 DPI (2.75" - 0.25" margins) const ZINE_PAGE_HEIGHT = 1163; // 750 * 1.55 = 1162.5 ≈ 1163
const ZINE_PAGE_HEIGHT = 1200; // 4.0 inches * 300 DPI (4.25" - 0.25" margins)
// Style-specific image generation prompts // Style-specific image generation prompts
const STYLE_PROMPTS: Record<string, string> = { const STYLE_PROMPTS: Record<string, string> = {
@ -82,8 +81,8 @@ export async function POST(request: NextRequest) {
function buildImagePrompt(outline: PageOutline, stylePrompt: string, tonePrompt: string): string { function buildImagePrompt(outline: PageOutline, stylePrompt: string, tonePrompt: string): string {
return `Create a single zine page image for print. return `Create a single zine page image for print.
EXACT DIMENSIONS: ${ZINE_PAGE_WIDTH}x${ZINE_PAGE_HEIGHT} pixels (portrait orientation, 2.5" x 4.0" at 300 DPI) EXACT DIMENSIONS: ${ZINE_PAGE_WIDTH}x${ZINE_PAGE_HEIGHT} pixels (portrait, 1.55 aspect ratio)
This is 1/8 of a US Letter page with 0.125" margins for an 8-page mini-zine fold. This is 1/8 of a US Letter page for an 8-page mini-zine fold.
PAGE ${outline.pageNumber}: "${outline.title}" PAGE ${outline.pageNumber}: "${outline.title}"
Type: ${outline.type} Type: ${outline.type}

9
app/api/zine/regenerate-page/route.ts
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@ -3,11 +3,10 @@ import { GoogleGenerativeAI } from "@google/generative-ai";
import { getZine, saveZine, getPageImagePath, readFileAsBase64, savePageImage } from "@/lib/storage"; import { getZine, saveZine, getPageImagePath, readFileAsBase64, savePageImage } from "@/lib/storage";
import type { PageOutline } from "@/lib/gemini"; import type { PageOutline } from "@/lib/gemini";
// Zine page dimensions: 1/8 of US Letter (8.5" x 11") at 300 DPI // Zine page dimensions: 1/8 of US Letter at 300 DPI
// Page size: 2.75" x 4.25", with 0.125" margin on each side // Aspect ratio: 1.55 (height / width)
// Content area: 2.5" x 4.0" const ZINE_PAGE_WIDTH = 750;
const ZINE_PAGE_WIDTH = 750; // 2.5 inches * 300 DPI (2.75" - 0.25" margins) const ZINE_PAGE_HEIGHT = 1163; // 750 * 1.55 = 1162.5 ≈ 1163
const ZINE_PAGE_HEIGHT = 1200; // 4.0 inches * 300 DPI (4.25" - 0.25" margins)
// Regeneration modes with denoising strengths // Regeneration modes with denoising strengths
const MODE_STRENGTHS: Record<string, number> = { const MODE_STRENGTHS: Record<string, number> = {