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ImFont: Rearranged members toward an optimal CalcTextSize() loop. Removed comments from destructor. Made constructor more explicit.

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omar 2019-02-09 15:54:01 +01:00
parent 539f69b950
commit 4b41d3b280
2 changed files with 31 additions and 31 deletions
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36
imgui.h
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@ -2078,24 +2078,26 @@ struct ImFontAtlas
// ImFontAtlas automatically loads a default embedded font for you when you call GetTexDataAsAlpha8() or GetTexDataAsRGBA32().
struct ImFont
{
// Members: Hot ~62/78 bytes
float FontSize; // <user set> // Height of characters, set during loading (don't change after loading)
float Scale; // = 1.f // Base font scale, multiplied by the per-window font scale which you can adjust with SetWindowFontScale()
ImVec2 DisplayOffset; // = (0.f,0.f) // Offset font rendering by xx pixels
ImVector<ImFontGlyph> Glyphs; // // All glyphs.
ImVector<float> IndexAdvanceX; // // Sparse. Glyphs->AdvanceX in a directly indexable way (more cache-friendly, for CalcTextSize functions which are often bottleneck in large UI).
ImVector<ImWchar> IndexLookup; // // Sparse. Index glyphs by Unicode code-point.
const ImFontGlyph* FallbackGlyph; // == FindGlyph(FontFallbackChar)
float FallbackAdvanceX; // == FallbackGlyph->AdvanceX
ImWchar FallbackChar; // = '?' // Replacement glyph if one isn't found. Only set via SetFallbackChar()
// Members: Hot ~24/32 bytes (for CalcTextSize)
ImVector<float> IndexAdvanceX; // 12/16 // out // // Sparse. Glyphs->AdvanceX in a directly indexable way (more cache-friendly, for CalcTextSize functions which are often bottleneck in large UI).
float FontSize; // 4 // in // <user set> // Height of characters, set during loading (don't change after loading)
float FallbackAdvanceX; // 4 // out // = FallbackGlyph->AdvanceX
ImWchar FallbackChar; // 2 // in // = '?' // Replacement glyph if one isn't found. Only set via SetFallbackChar()
// Members: Cold ~18/26 bytes
short ConfigDataCount; // ~ 1 // Number of ImFontConfig involved in creating this font. Bigger than 1 when merging multiple font sources into one ImFont.
ImFontConfig* ConfigData; // // Pointer within ContainerAtlas->ConfigData
ImFontAtlas* ContainerAtlas; // // What we has been loaded into
float Ascent, Descent; // // Ascent: distance from top to bottom of e.g. 'A' [0..FontSize]
bool DirtyLookupTables;
int MetricsTotalSurface;// // Total surface in pixels to get an idea of the font rasterization/texture cost (not exact, we approximate the cost of padding between glyphs)
// Members: Hot ~36/48 bytes (for CalcTextSize + render loop)
ImVector<ImWchar> IndexLookup; // 12-16 // out // // Sparse. Index glyphs by Unicode code-point.
ImVector<ImFontGlyph> Glyphs; // 12-16 // out // // All glyphs.
ImVec2 DisplayOffset; // 8 // in // = (0,0) // Offset font rendering by xx pixels
const ImFontGlyph* FallbackGlyph; // 4-8 // out // = FindGlyph(FontFallbackChar)
// Members: Cold ~28/40 bytes
ImFontAtlas* ContainerAtlas; // 4-8 // out // // What we has been loaded into
ImFontConfig* ConfigData; // 4-8 // in // // Pointer within ContainerAtlas->ConfigData
short ConfigDataCount; // 2 // in // ~ 1 // Number of ImFontConfig involved in creating this font. Bigger than 1 when merging multiple font sources into one ImFont.
bool DirtyLookupTables; // 1 // out //
float Scale; // 4 // in // = 1.f // Base font scale, multiplied by the per-window font scale which you can adjust with SetWindowFontScale()
float Ascent, Descent; // 8 // out // Ascent: distance from top to bottom of e.g. 'A' [0..FontSize]
int MetricsTotalSurface;// 4 // out // Total surface in pixels to get an idea of the font rasterization/texture cost (not exact, we approximate the cost of padding between glyphs)
// Methods
IMGUI_API ImFont();

26
imgui_draw.cpp
View File

@ -2390,38 +2390,36 @@ void ImFontGlyphRangesBuilder::BuildRanges(ImVector<ImWchar>* out_ranges)
ImFont::ImFont()
{
Scale = 1.0f;
FontSize = 0.0f;
FallbackAdvanceX = 0.0f;
FallbackChar = (ImWchar)'?';
DisplayOffset = ImVec2(0.0f, 0.0f);
ClearOutputData();
FallbackGlyph = NULL;
ContainerAtlas = NULL;
ConfigData = NULL;
ConfigDataCount = 0;
DirtyLookupTables = false;
Scale = 1.0f;
Ascent = Descent = 0.0f;
MetricsTotalSurface = 0;
}
ImFont::~ImFont()
{
// Invalidate active font so that the user gets a clear crash instead of a dangling pointer.
// If you want to delete fonts you need to do it between Render() and NewFrame().
// FIXME-CLEANUP
/*
ImGuiContext& g = *GImGui;
if (g.Font == this)
g.Font = NULL;
*/
ClearOutputData();
}
void ImFont::ClearOutputData()
{
FontSize = 0.0f;
FallbackAdvanceX = 0.0f;
Glyphs.clear();
IndexAdvanceX.clear();
IndexLookup.clear();
FallbackGlyph = NULL;
FallbackAdvanceX = 0.0f;
ConfigDataCount = 0;
ConfigData = NULL;
ContainerAtlas = NULL;
Ascent = Descent = 0.0f;
DirtyLookupTables = true;
Ascent = Descent = 0.0f;
MetricsTotalSurface = 0;
}