Class: ImFontAtlas

Inherits:

FFI::Struct

• Object
• FFI::Struct
• ImFontAtlas

Defined in:

lib/imgui.rb

Overview

Load and rasterize multiple TTF/OTF fonts into a same texture. The font atlas will build a single texture holding:

- One or more fonts.
- Custom graphics data needed to render the shapes needed by Dear ImGui.
- Mouse cursor shapes for software cursor rendering (unless setting 'Flags |= ImFontAtlasFlags_NoMouseCursors' in the font atlas).

It is the user-code responsibility to setup/build the atlas, then upload the pixel data into a texture accessible by your graphics api.

- Optionally, call any of the AddFont*** functions. If you don't call any, the default font embedded in the code will be loaded for you.
- Call GetTexDataAsAlpha8() or GetTexDataAsRGBA32() to build and retrieve pixels data.
- Upload the pixels data into a texture within your graphics system (see imgui_impl_xxxx.cpp examples)
- Call SetTexID(my_tex_id); and pass the pointer/identifier to your texture in a format natural to your graphics API.
  This value will be passed back to you during rendering to identify the texture. Read FAQ entry about ImTextureID for more details.

Common pitfalls:

• If you pass a ‘glyph_ranges’ array to AddFont*** functions, you need to make sure that your array persist up until the atlas is build (when calling GetTexData*** or Build()). We only copy the pointer, not the data.

• Important: By default, AddFontFromMemoryTTF() takes ownership of the data. Even though we are not writing to it, we will free the pointer on destruction. You can set font_cfg->FontDataOwnedByAtlas=false to keep ownership of your data and it won’t be freed,

• Even though many functions are suffixed with “TTF”, OTF data is supported just as well.

• This is an old API and it is currently awkward for those and various other reasons! We will address them in the future!

Class Method Summary

• .create ⇒ Object

Instance Method Summary

• #AddCustomRectFontGlyph(font, id, width, height, advance_x, offset = ImVec2.create(0,0)) ⇒ Object
• #AddCustomRectRegular(width, height) ⇒ Object
• #AddFont(font_cfg) ⇒ Object
• #AddFontDefault(font_cfg = nil) ⇒ Object
• #AddFontFromFileTTF(filename, size_pixels, font_cfg = nil, glyph_ranges = nil) ⇒ Object
• #AddFontFromMemoryCompressedBase85TTF(compressed_font_data_base85, size_pixels, font_cfg = nil, glyph_ranges = nil) ⇒ Object
• #AddFontFromMemoryCompressedTTF(compressed_font_data, compressed_font_data_size, size_pixels, font_cfg = nil, glyph_ranges = nil) ⇒ Object
• #AddFontFromMemoryTTF(font_data, font_data_size, size_pixels, font_cfg = nil, glyph_ranges = nil) ⇒ Object
• #Build ⇒ Object
• #CalcCustomRectUV(rect, out_uv_min, out_uv_max) ⇒ Object
• #Clear ⇒ Object
• #ClearFonts ⇒ Object
• #ClearInputData ⇒ Object
• #ClearTexData ⇒ Object
• #destroy ⇒ Object
• #GetCustomRectByIndex(index) ⇒ Object
• #GetGlyphRangesChineseFull ⇒ Object
• #GetGlyphRangesChineseSimplifiedCommon ⇒ Object
• #GetGlyphRangesCyrillic ⇒ Object
• #GetGlyphRangesDefault ⇒ Object
• #GetGlyphRangesGreek ⇒ Object
• #GetGlyphRangesJapanese ⇒ Object
• #GetGlyphRangesKorean ⇒ Object
• #GetGlyphRangesThai ⇒ Object
• #GetGlyphRangesVietnamese ⇒ Object
• #GetMouseCursorTexData(cursor, out_offset, out_size, out_uv_border, out_uv_fill) ⇒ Object
• #GetTexDataAsAlpha8(out_pixels, out_width, out_height, out_bytes_per_pixel = nil) ⇒ Object
• #GetTexDataAsRGBA32(out_pixels, out_width, out_height, out_bytes_per_pixel = nil) ⇒ Object
• #IsBuilt ⇒ Object
• #SetTexID(id) ⇒ Object

Class Method Details

.create ⇒ Object

# File 'lib/imgui.rb', line 1596

def self.create()
  return ImFontAtlas.new(ImGui::ImFontAtlas_ImFontAtlas())
end

Instance Method Details

#AddCustomRectFontGlyph(font, id, width, height, advance_x, offset = ImVec2.create(0,0)) ⇒ Object

# File 'lib/imgui.rb', line 1488

def AddCustomRectFontGlyph(font, id, width, height, advance_x, offset = ImVec2.create(0,0))
  ImGui::ImFontAtlas_AddCustomRectFontGlyph(self, font, id, width, height, advance_x, offset)
end

#AddCustomRectRegular(width, height) ⇒ Object

# File 'lib/imgui.rb', line 1492

def AddCustomRectRegular(width, height)
  ImGui::ImFontAtlas_AddCustomRectRegular(self, width, height)
end

#AddFont(font_cfg) ⇒ Object

# File 'lib/imgui.rb', line 1496

def AddFont(font_cfg)
  ImGui::ImFontAtlas_AddFont(self, font_cfg)
end

#AddFontDefault(font_cfg = nil) ⇒ Object

# File 'lib/imgui.rb', line 1500

def AddFontDefault(font_cfg = nil)
  ImGui::ImFontAtlas_AddFontDefault(self, font_cfg)
end

#AddFontFromFileTTF(filename, size_pixels, font_cfg = nil, glyph_ranges = nil) ⇒ Object

# File 'lib/imgui.rb', line 1504

def AddFontFromFileTTF(filename, size_pixels, font_cfg = nil, glyph_ranges = nil)
  ImGui::ImFontAtlas_AddFontFromFileTTF(self, filename, size_pixels, font_cfg, glyph_ranges)
end

#AddFontFromMemoryCompressedBase85TTF(compressed_font_data_base85, size_pixels, font_cfg = nil, glyph_ranges = nil) ⇒ Object

# File 'lib/imgui.rb', line 1508

def AddFontFromMemoryCompressedBase85TTF(compressed_font_data_base85, size_pixels, font_cfg = nil, glyph_ranges = nil)
  ImGui::ImFontAtlas_AddFontFromMemoryCompressedBase85TTF(self, compressed_font_data_base85, size_pixels, font_cfg, glyph_ranges)
end

#AddFontFromMemoryCompressedTTF(compressed_font_data, compressed_font_data_size, size_pixels, font_cfg = nil, glyph_ranges = nil) ⇒ Object

# File 'lib/imgui.rb', line 1512

def AddFontFromMemoryCompressedTTF(compressed_font_data, compressed_font_data_size, size_pixels, font_cfg = nil, glyph_ranges = nil)
  ImGui::ImFontAtlas_AddFontFromMemoryCompressedTTF(self, compressed_font_data, compressed_font_data_size, size_pixels, font_cfg, glyph_ranges)
end

#AddFontFromMemoryTTF(font_data, font_data_size, size_pixels, font_cfg = nil, glyph_ranges = nil) ⇒ Object

# File 'lib/imgui.rb', line 1516

def AddFontFromMemoryTTF(font_data, font_data_size, size_pixels, font_cfg = nil, glyph_ranges = nil)
  ImGui::ImFontAtlas_AddFontFromMemoryTTF(self, font_data, font_data_size, size_pixels, font_cfg, glyph_ranges)
end

#Build ⇒ Object

# File 'lib/imgui.rb', line 1520

def Build()
  ImGui::ImFontAtlas_Build(self)
end

#CalcCustomRectUV(rect, out_uv_min, out_uv_max) ⇒ Object

# File 'lib/imgui.rb', line 1524

def CalcCustomRectUV(rect, out_uv_min, out_uv_max)
  ImGui::ImFontAtlas_CalcCustomRectUV(self, rect, out_uv_min, out_uv_max)
end

#Clear ⇒ Object

# File 'lib/imgui.rb', line 1528

def Clear()
  ImGui::ImFontAtlas_Clear(self)
end

#ClearFonts ⇒ Object

# File 'lib/imgui.rb', line 1532

def ClearFonts()
  ImGui::ImFontAtlas_ClearFonts(self)
end

#ClearInputData ⇒ Object

# File 'lib/imgui.rb', line 1536

def ClearInputData()
  ImGui::ImFontAtlas_ClearInputData(self)
end

#ClearTexData ⇒ Object

# File 'lib/imgui.rb', line 1540

def ClearTexData()
  ImGui::ImFontAtlas_ClearTexData(self)
end

#destroy ⇒ Object

# File 'lib/imgui.rb', line 1608

def destroy()
  ImGui::ImFontAtlas_destroy(self)
end

#GetCustomRectByIndex(index) ⇒ Object

# File 'lib/imgui.rb', line 1544

def GetCustomRectByIndex(index)
  ImGui::ImFontAtlas_GetCustomRectByIndex(self, index)
end

#GetGlyphRangesChineseFull ⇒ Object

# File 'lib/imgui.rb', line 1548

def GetGlyphRangesChineseFull()
  ImGui::ImFontAtlas_GetGlyphRangesChineseFull(self)
end

#GetGlyphRangesChineseSimplifiedCommon ⇒ Object

# File 'lib/imgui.rb', line 1552

def GetGlyphRangesChineseSimplifiedCommon()
  ImGui::ImFontAtlas_GetGlyphRangesChineseSimplifiedCommon(self)
end

#GetGlyphRangesCyrillic ⇒ Object

# File 'lib/imgui.rb', line 1556

def GetGlyphRangesCyrillic()
  ImGui::ImFontAtlas_GetGlyphRangesCyrillic(self)
end

#GetGlyphRangesDefault ⇒ Object

# File 'lib/imgui.rb', line 1560

def GetGlyphRangesDefault()
  ImGui::ImFontAtlas_GetGlyphRangesDefault(self)
end

#GetGlyphRangesGreek ⇒ Object

# File 'lib/imgui.rb', line 1564

def GetGlyphRangesGreek()
  ImGui::ImFontAtlas_GetGlyphRangesGreek(self)
end

#GetGlyphRangesJapanese ⇒ Object

# File 'lib/imgui.rb', line 1568

def GetGlyphRangesJapanese()
  ImGui::ImFontAtlas_GetGlyphRangesJapanese(self)
end

#GetGlyphRangesKorean ⇒ Object

# File 'lib/imgui.rb', line 1572

def GetGlyphRangesKorean()
  ImGui::ImFontAtlas_GetGlyphRangesKorean(self)
end

#GetGlyphRangesThai ⇒ Object

# File 'lib/imgui.rb', line 1576

def GetGlyphRangesThai()
  ImGui::ImFontAtlas_GetGlyphRangesThai(self)
end

#GetGlyphRangesVietnamese ⇒ Object

# File 'lib/imgui.rb', line 1580

def GetGlyphRangesVietnamese()
  ImGui::ImFontAtlas_GetGlyphRangesVietnamese(self)
end

#GetMouseCursorTexData(cursor, out_offset, out_size, out_uv_border, out_uv_fill) ⇒ Object

# File 'lib/imgui.rb', line 1584

def GetMouseCursorTexData(cursor, out_offset, out_size, out_uv_border, out_uv_fill)
  ImGui::ImFontAtlas_GetMouseCursorTexData(self, cursor, out_offset, out_size, out_uv_border, out_uv_fill)
end

#GetTexDataAsAlpha8(out_pixels, out_width, out_height, out_bytes_per_pixel = nil) ⇒ Object

# File 'lib/imgui.rb', line 1588

def GetTexDataAsAlpha8(out_pixels, out_width, out_height, out_bytes_per_pixel = nil)
  ImGui::ImFontAtlas_GetTexDataAsAlpha8(self, out_pixels, out_width, out_height, out_bytes_per_pixel)
end

#GetTexDataAsRGBA32(out_pixels, out_width, out_height, out_bytes_per_pixel = nil) ⇒ Object

# File 'lib/imgui.rb', line 1592

def GetTexDataAsRGBA32(out_pixels, out_width, out_height, out_bytes_per_pixel = nil)
  ImGui::ImFontAtlas_GetTexDataAsRGBA32(self, out_pixels, out_width, out_height, out_bytes_per_pixel)
end

#IsBuilt ⇒ Object

# File 'lib/imgui.rb', line 1600

def IsBuilt()
  ImGui::ImFontAtlas_IsBuilt(self)
end

#SetTexID(id) ⇒ Object

# File 'lib/imgui.rb', line 1604

def SetTexID(id)
  ImGui::ImFontAtlas_SetTexID(self, id)
end