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ImFont: IndexLookup stores short instead of int, so typical ascii-set lookup fits in 256 bytes

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This commit is contained in:
ocornut
2016-04-23 11:37:18 +02:00
parent a20d69f9ce
commit 727ca4bd17
2 changed files with 6 additions and 5 deletions
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9
imgui_draw.cpp
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@ -1675,6 +1675,7 @@ void ImFont::BuildLookupTable()
for (int i = 0; i != Glyphs.Size; i++)
max_codepoint = ImMax(max_codepoint, (int)Glyphs[i].Codepoint);
IM_ASSERT(Glyphs.Size < 32*1024);
IndexXAdvance.clear();
IndexXAdvance.resize(max_codepoint + 1);
IndexLookup.clear();
@ -1682,13 +1683,13 @@ void ImFont::BuildLookupTable()
for (int i = 0; i < max_codepoint + 1; i++)
{
IndexXAdvance[i] = -1.0f;
IndexLookup[i] = -1;
IndexLookup[i] = (short)-1;
}
for (int i = 0; i < Glyphs.Size; i++)
{
int codepoint = (int)Glyphs[i].Codepoint;
IndexXAdvance[codepoint] = Glyphs[i].XAdvance;
IndexLookup[codepoint] = i;
IndexLookup[codepoint] = (short)i;
}
// Create a glyph to handle TAB
@ -1702,7 +1703,7 @@ void ImFont::BuildLookupTable()
tab_glyph.Codepoint = '\t';
tab_glyph.XAdvance *= 4;
IndexXAdvance[(int)tab_glyph.Codepoint] = (float)tab_glyph.XAdvance;
IndexLookup[(int)tab_glyph.Codepoint] = (int)(Glyphs.Size-1);
IndexLookup[(int)tab_glyph.Codepoint] = (short)(Glyphs.Size-1);
}
FallbackGlyph = NULL;
@ -1723,7 +1724,7 @@ const ImFont::Glyph* ImFont::FindGlyph(unsigned short c) const
{
if (c < IndexLookup.Size)
{
const int i = IndexLookup[c];
const short i = IndexLookup[c];
if (i != -1)
return &Glyphs.Data[i];
}