68 lines
2.1 KiB
Go
68 lines
2.1 KiB
Go
//go:build !heic
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package internal
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import (
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"bytes"
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"encoding/base64"
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"fmt"
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"image"
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"image/color"
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"image/jpeg"
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"log/slog"
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)
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// convertHEICtoJPEG returns a placeholder image when HEIC support is disabled
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// This version does not require the libheif library
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func convertHEICtoJPEG(heicData []byte) ([]byte, error) {
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slog.Warn("HEIC conversion is disabled. Returning placeholder image. Build with -tags heic to enable HEIC support.")
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// Return a simple placeholder JPEG image (400x300 gray rectangle with text)
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// This is better than returning an error, as it allows the app to function
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return generatePlaceholderJPEG()
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}
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// generatePlaceholderJPEG creates a simple gray placeholder image
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func generatePlaceholderJPEG() ([]byte, error) {
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// Create a 400x300 image
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width, height := 400, 300
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img := image.NewRGBA(image.Rect(0, 0, width, height))
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// Fill with gray background
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gray := color.RGBA{200, 200, 200, 255}
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for y := 0; y < height; y++ {
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for x := 0; x < width; x++ {
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img.Set(x, y, gray)
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}
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}
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// Add a dark border
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borderColor := color.RGBA{100, 100, 100, 255}
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for x := 0; x < width; x++ {
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img.Set(x, 0, borderColor)
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img.Set(x, height-1, borderColor)
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}
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for y := 0; y < height; y++ {
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img.Set(0, y, borderColor)
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img.Set(width-1, y, borderColor)
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}
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// Encode as JPEG
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var buf bytes.Buffer
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err := jpeg.Encode(&buf, img, &jpeg.Options{Quality: 80})
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if err != nil {
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return nil, fmt.Errorf("failed to encode placeholder image: %w", err)
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}
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return buf.Bytes(), nil
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}
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// Alternative: Return a base64-encoded minimal JPEG (1x1 pixel)
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// This is more efficient but less user-friendly
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func generateMinimalPlaceholderJPEG() ([]byte, error) {
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// 1x1 gray pixel JPEG (base64 encoded minimal JPEG)
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minimalJPEG := "/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/2wBDAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/wAARCAABAAEDASIAAhEBAxEB/8QAFQABAQAAAAAAAAAAAAAAAAAAAAv/xAAUEAEAAAAAAAAAAAAAAAAAAAAA/8QAFQEBAQAAAAAAAAAAAAAAAAAAAAX/xAAUEQEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIRAxEAPwA/wA/h"
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return base64.StdEncoding.DecodeString(minimalJPEG)
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}
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