[Core] Add option to hash text contents to text config (#238)

nicbarker · Jan 29, 2025 · a1e692b · a1e692b
1 parent 5fae7a6
commit a1e692b
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Showing 8 changed files with 20 additions and 9 deletions.
diff --git a/bindings/odin/clay-odin/clay.odin b/bindings/odin/clay-odin/clay.odin
@@ -111,12 +111,13 @@ TextWrapMode :: enum EnumBackingType {
 }
 
 TextElementConfig :: struct {
-    textColor:     Color,
-    fontId:        u16,
-    fontSize:      u16,
-    letterSpacing: u16,
-    lineHeight:    u16,
-    wrapMode:      TextWrapMode,
+    textColor:          Color,
+    fontId:             u16,
+    fontSize:           u16,
+    letterSpacing:      u16,
+    lineHeight:         u16,
+    wrapMode:           TextWrapMode,
+    hashStringContents: bool,
 }
 
 ImageElementConfig :: struct {

diff --git a/bindings/odin/clay-odin/linux/clay.a b/bindings/odin/clay-odin/linux/clay.a
diff --git a/bindings/odin/clay-odin/macos-arm64/clay.a b/bindings/odin/clay-odin/macos-arm64/clay.a
diff --git a/bindings/odin/clay-odin/macos/clay.a b/bindings/odin/clay-odin/macos/clay.a
diff --git a/bindings/odin/clay-odin/wasm/clay.o b/bindings/odin/clay-odin/wasm/clay.o
diff --git a/bindings/odin/clay-odin/windows/clay.lib b/bindings/odin/clay-odin/windows/clay.lib
diff --git a/clay.h b/clay.h
@@ -324,6 +324,7 @@ typedef struct {
     uint16_t letterSpacing;
     uint16_t lineHeight;
     Clay_TextElementConfigWrapMode wrapMode;
+    bool hashStringContents;
     #ifdef CLAY_EXTEND_CONFIG_TEXT
     CLAY_EXTEND_CONFIG_TEXT
     #endif
@@ -987,9 +988,18 @@ uint32_t Clay__HashTextWithConfig(Clay_String *text, Clay_TextElementConfig *con
     uint32_t hash = 0;
     uintptr_t pointerAsNumber = (uintptr_t)text->chars;
 
-    hash += pointerAsNumber;
-    hash += (hash << 10);
-    hash ^= (hash >> 6);
+    if (config->hashStringContents) {
+        uint32_t maxLengthToHash = CLAY__MIN(text->length, 256);
+        for (int i = 0; i < maxLengthToHash; i++) {
+            hash += text->chars[i];
+            hash += (hash << 10);
+            hash ^= (hash >> 6);
+        }
+    } else {
+        hash += pointerAsNumber;
+        hash += (hash << 10);
+        hash ^= (hash >> 6);
+    }
 
     hash += text->length;
     hash += (hash << 10);

diff --git a/examples/clay-official-website/build/clay/index.wasm b/examples/clay-official-website/build/clay/index.wasm