pi harness reimplement

src/tools/image.jl

@@ -0,0 +1,66 @@
+"""
+    tools/image.jl - Image utilities
+
+This module provides image detection and encoding utilities.
+"""
+
+module Image
+
+using ..Types: *
+
+function detectSupportedImageMimeType(buffer::Vector{UInt8})::Union{String, Nothing}
+    if length(buffer) >= 3 && buffer[1:3] == [0xff, 0xd8, 0xff]
+        if buffer[4] == 0xf7
+            return nothing
+        end
+        return "image/jpeg"
+    end
+
+    if length(buffer) >= 8 && buffer[1:8] == [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]
+        return "image/png"
+    end
+
+    if length(buffer) >= 3 && buffer[1:3] == [0x47, 0x49, 0x46]
+        return "image/gif"
+    end
+
+    if length(buffer) >= 12 && buffer[1:4] == [0x52, 0x49, 0x46, 0x46] && buffer[9:12] == [0x57, 0x45, 0x42, 0x50]
+        return "image/webp"
+    end
+
+    if length(buffer) >= 2 && buffer[1:2] == [0x42, 0x4d]
+        return "image/bmp"
+    end
+
+    return nothing
+end
+
+function encodeBase64(bytes::Vector{UInt8})::String
+    alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+    output = ""
+
+    for i in 1:3:length(bytes)
+        first_byte = i <= length(bytes) ? bytes[i] : 0
+        second_byte = i+1 <= length(bytes) ? bytes[i+1] : 0
+        third_byte = i+2 <= length(bytes) ? bytes[i+2] : 0
+
+        output *= alphabet[first_byte >> 2 + 1]
+        output *= alphabet[(((first_byte & 0x03) << 4) | ((second_byte >> 4) & 0x0f)) + 1]
+        
+        if i+1 <= length(bytes)
+            output *= alphabet[(((second_byte & 0x0f) << 2) | ((third_byte >> 6) & 0x03)) + 1]
+        else
+            output *= "="
+        end
+
+        if i+2 <= length(bytes)
+            output *= alphabet[third_byte & 0x3f + 1]
+        else
+            output *= "="
+        end
+    end
+
+    return output
+end
+
+end