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ImFont: Added AddRemapChar() helper (#609)

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ocornut
2016-04-26 10:08:06 +02:00
parent 247da0e01b
commit 4b6e9ac396
3 changed files with 39 additions and 11 deletions
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38
imgui_draw.cpp
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@ -1677,14 +1677,8 @@ void ImFont::BuildLookupTable()
IM_ASSERT(Glyphs.Size < 32*1024);
IndexXAdvance.clear();
IndexXAdvance.resize(max_codepoint + 1);
IndexLookup.clear();
IndexLookup.resize(max_codepoint + 1);
for (int i = 0; i < max_codepoint + 1; i++)
{
IndexXAdvance[i] = -1.0f;
IndexLookup[i] = (short)-1;
}
GrowIndex(max_codepoint + 1);
for (int i = 0; i < Glyphs.Size; i++)
{
int codepoint = (int)Glyphs[i].Codepoint;
@ -1720,6 +1714,36 @@ void ImFont::SetFallbackChar(ImWchar c)
BuildLookupTable();
}
void ImFont::GrowIndex(int new_size)
{
IM_ASSERT(IndexXAdvance.Size == IndexLookup.Size);
int old_size = IndexLookup.Size;
if (new_size <= old_size)
return;
IndexXAdvance.resize(new_size);
IndexLookup.resize(new_size);
for (int i = old_size; i < new_size; i++)
{
IndexXAdvance[i] = -1.0f;
IndexLookup[i] = (short)-1;
}
}
void ImFont::AddRemapChar(ImWchar dst, ImWchar src, bool overwrite_dst)
{
IM_ASSERT(IndexLookup.Size > 0); // Currently this can only be called AFTER the font has been built, aka after calling ImFontAtlas::GetTexDataAs*() function.
int index_size = IndexLookup.Size;
if (dst < index_size && IndexLookup.Data[dst] == -1 && !overwrite_dst) // 'dst' already exists
return;
if (src >= index_size && dst >= index_size) // both 'dst' and 'src' don't exist -> no-op
return;
GrowIndex(dst + 1);
IndexLookup[dst] = (src < index_size) ? IndexLookup.Data[src] : -1;
IndexXAdvance[dst] = (src < index_size) ? IndexXAdvance.Data[src] : 1.0f;
}
const ImFont::Glyph* ImFont::FindGlyph(unsigned short c) const
{
if (c < IndexLookup.Size)