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_font kerning cache

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This commit is contained in:
Ari Vuollet
2023-09-09 10:45:34 +03:00
parent 43b2348d62
commit df62892725
4 changed files with 28 additions and 13 deletions
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12
Source/Engine/Render2D/Font.cpp
View File

@@ -119,7 +119,7 @@ void Font::Invalidate()
_characters.Clear();
}
void Font::ProcessText(const StringView& text, Array<FontLineCache>& outputLines, const TextLayoutOptions& layout, Array<FontCharacterEntry>& characterEntries)
void Font::ProcessText(const StringView& text, Array<FontLineCache>& outputLines, const TextLayoutOptions& layout, Array<FontCharacterEntry>& characterEntries, Array<float>& characterKernings)
{
int32 textLength = text.Length();
if (textLength == 0)
@@ -235,6 +235,7 @@ void Font::ProcessText(const StringView& text, Array<FontLineCache>& outputLines
}
}
characterEntries.Add(entry);
characterKernings.Add((float)kerning * scale);
// Check if move to another line
if (moveLine)
@@ -314,7 +315,8 @@ Float2 Font::MeasureText(const StringView& text, const TextLayoutOptions& layout
// Process text
Array<FontLineCache> lines;
Array<FontCharacterEntry> characterEntries;
ProcessText(text, lines, layout, characterEntries);
Array<float> xAdvances;
ProcessText(text, lines, layout, characterEntries, xAdvances);
// Calculate bounds
Float2 max = Float2::Zero;
@@ -336,7 +338,8 @@ int32 Font::HitTestText(const StringView& text, const Float2& location, const Te
// Process text
Array<FontLineCache> lines;
Array<FontCharacterEntry> characterEntries;
ProcessText(text, lines, layout, characterEntries);
Array<float> xAdvances;
ProcessText(text, lines, layout, characterEntries, xAdvances);
ASSERT(lines.HasItems());
float scale = layout.Scale / FontManager::FontScale;
float baseLinesDistance = static_cast<float>(_height) * layout.BaseLinesGapScale * scale;
@@ -411,7 +414,8 @@ Float2 Font::GetCharPosition(const StringView& text, int32 index, const TextLayo
// Process text
Array<FontLineCache> lines;
Array<FontCharacterEntry> characterEntries;
ProcessText(text, lines, layout, characterEntries);
Array<float> xAdvances;
ProcessText(text, lines, layout, characterEntries, xAdvances);
ASSERT(lines.HasItems());
float scale = layout.Scale / FontManager::FontScale;
float baseLinesDistance = static_cast<float>(_height) * layout.BaseLinesGapScale * scale;

8
Source/Engine/Render2D/Font.h
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@@ -344,7 +344,7 @@ public:
/// <param name="text">The input text.</param>
/// <param name="layout">The layout properties.</param>
/// <param name="outputLines">The output lines list.</param>
void ProcessText(const StringView& text, Array<FontLineCache>& outputLines, API_PARAM(Ref) const TextLayoutOptions& layout, Array<FontCharacterEntry>& characterEntries);
void ProcessText(const StringView& text, Array<FontLineCache>& outputLines, API_PARAM(Ref) const TextLayoutOptions& layout, Array<FontCharacterEntry>& characterEntries, Array<float>& characterKernings);
/// <summary>
/// Processes text to get cached lines for rendering.
@@ -356,7 +356,8 @@ public:
{
Array<FontLineCache> lines;
Array<FontCharacterEntry> characterEntries;
ProcessText(text, lines, layout, characterEntries);
Array<float> xAdvances;
ProcessText(text, lines, layout, characterEntries, xAdvances);
return lines;
}
@@ -371,7 +372,8 @@ public:
{
Array<FontLineCache> lines;
Array<FontCharacterEntry> characterEntries;
ProcessText(textRange.Substring(text), lines, layout, characterEntries);
Array<float> xAdvances;
ProcessText(textRange.Substring(text), lines, layout, characterEntries, xAdvances);
return lines;
}

18
Source/Engine/Render2D/Render2D.cpp
View File

@@ -1272,15 +1272,19 @@ void Render2D::DrawText(Font* font, const StringView& text, const Color& color,
FontTextureAtlas* fontAtlas = nullptr;
Float2 invAtlasSize = Float2::One;
FontCharacterEntry previous;
int32 kerning;
//int32 kerning;
float scale = layout.Scale / FontManager::FontScale;
const bool enableFallbackFonts = EnumHasAllFlags(Features, RenderingFeatures::FallbackFonts);
float fontHeightOffset = Math::Ceil((font->GetHeight() + font->GetDescender()) * scale);
// Process text to get lines
Lines.Clear();
static Array<FontCharacterEntry> characterEntries(128);
static Array<float> characterKernings(128);
characterEntries.Clear();
font->ProcessText(text, Lines, layout, characterEntries);
characterKernings.Clear();
font->ProcessText(text, Lines, layout, characterEntries, characterKernings);
// Render all lines
//FontCharacterEntry entry;
@@ -1313,6 +1317,7 @@ void Render2D::DrawText(Font* font, const StringView& text, const Color& color,
// Get character entry
//font->GetCharacter(currentChar, entry, enableFallbackFonts);
const FontCharacterEntry& entry = characterEntries[entryIndex];
float kerning = characterKernings[entryIndex];
// Check if need to select/change font atlas (since characters even in the same font may be located in different atlases)
if (fontAtlas == nullptr || entry.TextureIndex != fontAtlasIndex)
@@ -1335,7 +1340,7 @@ void Render2D::DrawText(Font* font, const StringView& text, const Color& color,
// Get kerning
const bool isWhitespace = StringUtils::IsWhitespace(currentChar);
if (!isWhitespace && previous.IsValid)
/*if (!isWhitespace && previous.IsValid)
{
kerning = entry.Font->GetKerning(previous.Character, entry.Character);
}
@@ -1343,15 +1348,18 @@ void Render2D::DrawText(Font* font, const StringView& text, const Color& color,
{
kerning = 0;
}
pointer.X += (float)kerning * scale;
pointer.X += (float)kerning * scale;*/
pointer.X += kerning;
previous = entry;
// Omit whitespace characters
if (!isWhitespace)
//if (xAdvance != 0.0f)
{
// Calculate character size and atlas coordinates
const float x = pointer.X + entry.OffsetX * scale;
const float y = pointer.Y - entry.OffsetY * scale + Math::Ceil((font->GetHeight() + font->GetDescender()) * scale);
const float y = pointer.Y - entry.OffsetY * scale + fontHeightOffset;
Rectangle charRect(x, y, entry.UVSize.X * scale, entry.UVSize.Y * scale);
charRect.Offset(layout.Bounds.Location);

3
Source/Engine/UI/TextRender.cpp
View File

@@ -159,7 +159,8 @@ void TextRender::UpdateLayout()
// Perform layout
Array<FontLineCache> lines;
Array<FontCharacterEntry> characterEntries;
font->ProcessText(text, lines, _layoutOptions, characterEntries);
Array<float> xAdvances;
font->ProcessText(text, lines, _layoutOptions, characterEntries, xAdvances);
// Prepare buffers capacity
_ib.Data.EnsureCapacity(text.Length() * 6 * sizeof(uint16));