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ImFont: Added AddRemapChar() helper (#609)

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This commit is contained in:
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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2
imgui.cpp
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@ -537,7 +537,7 @@
- style: WindowPadding needs to be EVEN needs the 0.5 multiplier probably have a subtle effect on clip rectangle
- text: simple markup language for color change?
- font: dynamic font atlas to avoid baking huge ranges into bitmap and make scaling easier.
- font: helper to add glyph redirect/replacements (e.g. redirect alternate apostrophe unicode code points to ascii one, etc.)
- font: fix AddRemapChar() to work before font has been built.
- log: LogButtons() options for specifying depth and/or hiding depth slider
- log: have more control over the log scope (e.g. stop logging when leaving current tree node scope)
- log: be able to log anything (e.g. right-click on a window/tree-node, shows context menu? log into tty/file/clipboard)

8
imgui.h
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@ -1316,9 +1316,9 @@ struct ImFont
IMGUI_API ~ImFont();
IMGUI_API void Clear();
IMGUI_API void BuildLookupTable();
IMGUI_API const Glyph* FindGlyph(unsigned short c) const;
IMGUI_API const Glyph* FindGlyph(ImWchar c) const;
IMGUI_API void SetFallbackChar(ImWchar c);
float GetCharAdvance(unsigned short c) const { return ((int)c < IndexXAdvance.Size) ? IndexXAdvance[(int)c] : FallbackXAdvance; }
float GetCharAdvance(ImWchar c) const { return ((int)c < IndexXAdvance.Size) ? IndexXAdvance[(int)c] : FallbackXAdvance; }
bool IsLoaded() const { return ContainerAtlas != NULL; }
// 'max_width' stops rendering after a certain width (could be turned into a 2d size). FLT_MAX to disable.
@ -1327,6 +1327,10 @@ struct ImFont
IMGUI_API const char* CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width) const;
IMGUI_API void RenderChar(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, unsigned short c) const;
IMGUI_API void RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, float wrap_width = 0.0f, bool cpu_fine_clip = false) const;
// Private
IMGUI_API void GrowIndex(int new_size);
IMGUI_API void AddRemapChar(ImWchar dst, ImWchar src, bool overwrite_dst = true); // Makes 'dst' character/glyph points to 'src' character/glyph. Currently needs to be called AFTER fonts have been built.
};
//---- Include imgui_user.h at the end of imgui.h

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)