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#include "TextMeshGenerator.h"
// ¼ÆËãÒ»¸ö¹þÏ£Öµ
static uint32_t GetStrHash(const UnicodeString& str)
{
if (str.length == 0)
return 0;
int len = str.length;
uint32_t hash = (uint32_t)len; // seed
size_t step = (len >> 5) + 1;
for (int l = len; l >= step; l -= step)
{
unsigned short unicode = str.str[l - 1];
unsigned char hicode = *((unsigned char*)&unicode);
unsigned char locode = *(((unsigned char*)&unicode) + 1);
hash = hash ^ ((hash << 5) + (hash >> 2) + hicode + locode);
}
return hash;
}
const UITextMesh* TextMeshGenerator::GetTextMesh(
const UnicodeString& str
, Font* font
, int pixelSize
, int lineHeight
, Color32 col32
, ETextAnchor anchor
, ETextAlignment alignment
, bool wordwrap
, float preferred
){
uint32_t hash = GetStrHash(str);
UITextMeshList* tm = NULL;
bool hasHash = m_TextMeshes.count(hash);
if (hasHash)
{
tm = m_TextMeshes[hash];
while (tm)
{
UITextMesh* mesh = tm->mesh;
if (mesh->GetFont() != font
|| mesh->GetPixelSize() != pixelSize
|| mesh->GetLineHeight() != lineHeight
|| mesh->GetAnchor() != anchor
|| mesh->GetAlignment() != alignment
|| mesh->GetWordwrap() != wordwrap
|| mesh->GetPreferred() != preferred
|| mesh->GetColor() != col32
){
tm = tm->next;
continue;
}
const UnicodeString& content = mesh->GetContent();
if (content.length != str.length)
{
tm = tm->next;
continue;
}
if (memcmp(str.str, content.str, sizeof(character::Unicode) * str.length) == 0)
{
return tm->mesh;
}
tm = tm->next;
}
}
tm = new UITextMeshList();
try {
tm->mesh = new UITextMesh(str, font, pixelSize, lineHeight, col32, anchor, alignment, wordwrap, preferred);
log_info("Text", "New UITextMesh");
}
catch(TextMeshException& e)
{
delete tm;
throw;
}
if (hasHash)
{
UITextMeshList* list = m_TextMeshes[hash];
tm->next = list;
m_TextMeshes[hash] = tm;
}
else
{
tm->next = NULL;
m_TextMeshes.insert(std::pair<uint32_t, UITextMeshList*>(hash, tm));
}
return tm->mesh;
}
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