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ImFontConfig: Added GlyphOffset to explicitely offset glyphs at font build time, useful for merged fonts. May remove MergeGlyphCenterV soon.

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This commit is contained in:
omar 2017-05-26 13:36:52 +02:00
parent 0828a1fd6c
commit c5c77a3476
2 changed files with 8 additions and 5 deletions
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3
imgui.h
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@ -1270,9 +1270,10 @@ struct ImFontConfig
int OversampleH, OversampleV; // 3, 1 // Rasterize at higher quality for sub-pixel positioning. We don't use sub-pixel positions on the Y axis.
bool PixelSnapH; // false // Align every glyph to pixel boundary. Useful e.g. if you are merging a non-pixel aligned font with the default font. If enabled, you can set OversampleH/V to 1.
ImVec2 GlyphExtraSpacing; // 0, 0 // Extra spacing (in pixels) between glyphs
ImVec2 GlyphOffset; // 0, 0 // Offset all glyphs from this font input
const ImWchar* GlyphRanges; // // Pointer to a user-provided list of Unicode range (2 value per range, values are inclusive, zero-terminated list). THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE.
bool MergeMode; // false // Merge into previous ImFont, so you can combine multiple inputs font into one ImFont (e.g. ASCII font + icons + Japanese glyphs).
bool MergeGlyphCenterV; // false // When merging (multiple ImFontInput for one ImFont), vertically center new glyphs instead of aligning their baseline
bool MergeGlyphCenterV; // false // When merging (multiple ImFontInput for one ImFont), vertically center new glyphs instead of aligning their baseline. Prefer using an explicit GlyphOffset.y setting instead, may obsolete MergeGlyphCenterV.
// [Internal]
char Name[32]; // Name (strictly for debugging)

10
imgui_draw.cpp
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@ -1043,6 +1043,7 @@ ImFontConfig::ImFontConfig()
OversampleV = 1;
PixelSnapH = false;
GlyphExtraSpacing = ImVec2(0.0f, 0.0f);
GlyphOffset = ImVec2(0.0f, 0.0f);
GlyphRanges = NULL;
MergeMode = false;
MergeGlyphCenterV = false;
@ -1426,7 +1427,8 @@ bool ImFontAtlas::Build()
dst_font->MetricsTotalSurface = 0;
}
dst_font->ConfigDataCount++;
float off_y = (cfg.MergeMode && cfg.MergeGlyphCenterV) ? (ascent - dst_font->Ascent) * 0.5f : 0.0f;
float off_x = cfg.GlyphOffset.x, off_y = cfg.GlyphOffset.y;
float merge_off_y = (cfg.MergeMode && cfg.MergeGlyphCenterV) ? (ascent - dst_font->Ascent) * 0.5f : 0.0f;
dst_font->FallbackGlyph = NULL; // Always clear fallback so FindGlyph can return NULL. It will be set again in BuildLookupTable()
for (int i = 0; i < tmp.RangesCount; i++)
@ -1449,10 +1451,10 @@ bool ImFontAtlas::Build()
dst_font->Glyphs.resize(dst_font->Glyphs.Size + 1);
ImFont::Glyph& glyph = dst_font->Glyphs.back();
glyph.Codepoint = (ImWchar)codepoint;
glyph.X0 = q.x0; glyph.Y0 = q.y0; glyph.X1 = q.x1; glyph.Y1 = q.y1;
glyph.X0 = q.x0 + off_x; glyph.Y0 = q.y0 + off_y; glyph.X1 = q.x1 + off_x; glyph.Y1 = q.y1 + off_y;
glyph.U0 = q.s0; glyph.V0 = q.t0; glyph.U1 = q.s1; glyph.V1 = q.t1;
glyph.Y0 += (float)(int)(dst_font->Ascent + off_y + 0.5f);
glyph.Y1 += (float)(int)(dst_font->Ascent + off_y + 0.5f);
glyph.Y0 += (float)(int)(dst_font->Ascent + merge_off_y + 0.5f);
glyph.Y1 += (float)(int)(dst_font->Ascent + merge_off_y + 0.5f);
glyph.XAdvance = (pc.xadvance + cfg.GlyphExtraSpacing.x); // Bake spacing into XAdvance
if (cfg.PixelSnapH)
glyph.XAdvance = (float)(int)(glyph.XAdvance + 0.5f);