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ImFont: Split some building code into a AddGlyph() helper (that custom rect code and imgui_freetype can use)
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529ca279a4
5
imgui.h
5
imgui.h
@ -1387,7 +1387,7 @@ struct ImFontAtlas
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IMGUI_API const ImWchar* GetGlyphRangesCyrillic(); // Default + about 400 Cyrillic characters
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IMGUI_API const ImWchar* GetGlyphRangesThai(); // Default + Thai characters
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// Helpers to build glyph ranges from text data. Feed all your application strings/characters to it then call BuildRanges().
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// Helpers to build glyph ranges from text data. Feed your application strings/characters to it then call BuildRanges().
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struct GlyphRangesBuilder
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{
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ImVector<unsigned char> UsedChars; // Store 1-bit per Unicode code point (0=unused, 1=used)
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@ -1477,8 +1477,9 @@ struct ImFont
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IMGUI_API void RenderChar(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, unsigned short c) const;
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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;
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// Private
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// [Private]
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IMGUI_API void GrowIndex(int new_size);
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IMGUI_API void AddGlyph(ImWchar c, float x0, float y0, float x1, float y1, float u0, float v0, float u1, float v1, float x_advance);
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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.
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};
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@ -1535,23 +1535,7 @@ bool ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas)
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stbtt_aligned_quad q;
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float dummy_x = 0.0f, dummy_y = 0.0f;
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stbtt_GetPackedQuad(range.chardata_for_range, atlas->TexWidth, atlas->TexHeight, char_idx, &dummy_x, &dummy_y, &q, 0);
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dst_font->Glyphs.resize(dst_font->Glyphs.Size + 1);
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ImFont::Glyph& glyph = dst_font->Glyphs.back();
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glyph.Codepoint = (ImWchar)codepoint;
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glyph.X0 = q.x0 + off_x;
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glyph.Y0 = q.y0 + off_y;
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glyph.X1 = q.x1 + off_x;
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glyph.Y1 = q.y1 + off_y;
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glyph.U0 = q.s0;
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glyph.V0 = q.t0;
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glyph.U1 = q.s1;
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glyph.V1 = q.t1;
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glyph.XAdvance = (pc.xadvance + cfg.GlyphExtraSpacing.x); // Bake spacing into XAdvance
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if (cfg.PixelSnapH)
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glyph.XAdvance = (float)(int)(glyph.XAdvance + 0.5f);
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dst_font->MetricsTotalSurface += (int)((glyph.U1 - glyph.U0) * atlas->TexWidth + 1.99f) * (int)((glyph.V1 - glyph.V0) * atlas->TexHeight + 1.99f); // +1 to account for average padding, +0.99 to round
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dst_font->AddGlyph((ImWchar)codepoint, q.x0 + off_x, q.y0 + off_y, q.x1 + off_x, q.y1 + off_y, q.s0, q.t0, q.s1, q.t1, pc.xadvance);
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}
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}
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cfg.DstFont->BuildLookupTable();
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@ -1923,6 +1907,28 @@ void ImFont::GrowIndex(int new_size)
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IndexLookup.resize(new_size, (unsigned short)-1);
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}
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void ImFont::AddGlyph(ImWchar codepoint, float x0, float y0, float x1, float y1, float u0, float v0, float u1, float v1, float x_advance)
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{
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Glyphs.resize(Glyphs.Size + 1);
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ImFont::Glyph& glyph = Glyphs.back();
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glyph.Codepoint = (ImWchar)codepoint;
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glyph.X0 = x0;
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glyph.Y0 = y0;
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glyph.X1 = x1;
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glyph.Y1 = y1;
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glyph.U0 = u0;
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glyph.V0 = v0;
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glyph.U1 = u1;
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glyph.V1 = v1;
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glyph.XAdvance = (x_advance + ConfigData->GlyphExtraSpacing.x); // Bake spacing into XAdvance
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if (ConfigData->PixelSnapH)
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glyph.XAdvance = (float)(int)(glyph.XAdvance + 0.5f);
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// Compute rough surface usage metrics (+1 to account for average padding, +0.99 to round)
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MetricsTotalSurface += (int)((glyph.U1 - glyph.U0) * ContainerAtlas->TexWidth + 1.99f) * (int)((glyph.V1 - glyph.V0) * ContainerAtlas->TexHeight + 1.99f);
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}
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void ImFont::AddRemapChar(ImWchar dst, ImWchar src, bool overwrite_dst)
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{
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IM_ASSERT(IndexLookup.Size > 0); // Currently this can only be called AFTER the font has been built, aka after calling ImFontAtlas::GetTexDataAs*() function.
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