Gottfried/glitchy-engine-beef
1
0
Fork 0
mirror of https://github.com/aharabada/glitchy-engine-beef.git synced 2026-09-05 21:01:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

Start of text renderer component

Browse Source 
- UC, LC, IC, RC tags
This commit is contained in:
Simon Lübeß
2024-03-14 22:17:57 +01:00
parent a87820c7da
commit e703452b94
6 changed files with 265 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files
GlitchyEngine/src/Renderer/Text/FontRenderer.bf
+132 -20
View File
@@ -5,6 +5,7 @@ using GlitchyEngine.Math;
using System.Collections;
using GlitchyEngine.Core;
using GlitchyEngine.Content;
using System.Text;
using static FreeType.HarfBuzz;
using internal GlitchyEngine.Renderer.Text;
@@ -126,7 +127,15 @@ namespace GlitchyEngine.Renderer.Text
case BottomToTop;
}
public static PreparedText PrepareText(Font font, String text, float fontSize, Color fontColor = .White, Color bitmapColor = .White, float lineSpaceScale = 1.0f, TextDirection direction = .LeftToRight)
public enum TextCase
{
case RetainCase;
case UpperCase;
case LowerCase;
case InvertCase;
}
public static PreparedText PrepareText(Font font, StringView text, float fontSize, Color fontColor = .White, Color bitmapColor = .White, float lineSpaceScale = 1.0f, TextDirection direction = .LeftToRight)
{
Debug.Profiler.ProfileRendererFunction!();
@@ -143,17 +152,18 @@ namespace GlitchyEngine.Renderer.Text
// Position of the next character on the line
float penPosition = 0;
// TODO: use stringview?
StringView textBuffer = .(text, 0, 0);//new:ScopedAlloc! String();
hb_buffer_t* buf = hb_buffer_create();
List<char32> chars = new:ScopedAlloc! .(text.Length);
int runStart = 0;
//PreparedLine currentLine = new PreparedLine();
hb_buffer_t* buf = hb_buffer_create();
// Stack to keep track of the text direction.
List<TextDirection> textDirectionStack = scope .();
textDirectionStack.Add(direction);
List<TextCase> textCaseStack = scope .();
textCaseStack.Add(.RetainCase);
int movedLines = 0;
Font currentFont = font;
@@ -168,10 +178,9 @@ namespace GlitchyEngine.Renderer.Text
hb_buffer_clear_contents(buf);
hb_buffer_add_utf8(buf, text.Ptr, (.)text.Length, (.)(textBuffer.Ptr - text.Ptr), (.)textBuffer.Length);
textBuffer.Ptr += textBuffer.Length;
textBuffer.Length = 0;
hb_buffer_add_utf32(buf, chars.Ptr, (.)chars.Count, (.)runStart, (.)(chars.Count - runStart));
runStart = chars.Count;
// Set the script, language and direction of the buffer.
// TODO: change direction, script, etc.
@@ -226,6 +235,8 @@ namespace GlitchyEngine.Renderer.Text
penPosition = 0;
}
bool escapeNextChar = false;
for (char32 char in text.DecodedChars)
{
defer
@@ -233,16 +244,21 @@ namespace GlitchyEngine.Renderer.Text
currentIndex = @char.NextIndex;
}
switch(char)
void DoLineBreak()
{
case '\n':
chars.Add('\n');
// Only flush after the first new line
if (movedLines == 0)
FlushShapeBuffer();
// carriage return
movedLines++;
}
switch(char)
{
case '\n':
DoLineBreak();
continue;
case '\u{240}':
FlushShapeBuffer();
@@ -274,6 +290,107 @@ namespace GlitchyEngine.Renderer.Text
textDirectionStack.PopBack();
continue;
case '\\':
if (escapeNextChar)
break;
else
{
escapeNextChar = true;
continue;
}
case '<':
if (escapeNextChar)
break;
// Copy the char enumerator to make a lookahead
String.UTF8Enumerator tagEnumerator = @char;
String tagText = scope .();
int endIndex = -1;
for (char32 tagChar in tagEnumerator)
{
if (tagChar == '>')
{
endIndex = tagEnumerator.NextIndex;
break;
}
else
{
UTF32.Decode(Span<char32>(&tagChar, 1), tagText);
}
}
// It seems that it's just an unescaped <
if (endIndex == -1)
break; // TODO: Probably warn or something
bool isEndTag = tagText.StartsWith('/');
if (isEndTag)
tagText.Remove(0);
switch(tagText)
{
case "b", "bold":
// bold
case "br", "linebreak":
DoLineBreak();
case "u", "underline":
// underlined
case "i", "italic":
// italic
case "small":
case "sub", "subscript":
case "sup", "superscript":
case "s", "strikethrough":
// Text case control
case "lc", "lowercase":
if (isEndTag && textCaseStack.Count > 0)
textCaseStack.PopBack();
else
textCaseStack.Add(.LowerCase);
case "uc", "uppercase":
if (isEndTag && textCaseStack.Count > 0)
textCaseStack.PopBack();
else
textCaseStack.Add(.UpperCase);
case "rc", "retaincase":
if (isEndTag && textCaseStack.Count > 0)
textCaseStack.PopBack();
else
textCaseStack.Add(.RetainCase);
case "ic", "invertcase":
if (isEndTag && textCaseStack.Count > 0)
textCaseStack.PopBack();
else
textCaseStack.Add(.InvertCase);
}
// Skip the tag in the main enumerator
@char.NextIndex = endIndex;
continue;
}
escapeNextChar = false;
switch (textCaseStack.Back)
{
case .RetainCase:
// Nothing to do
case .LowerCase:
char = char.ToLower;
case .UpperCase:
char = char.ToUpper;
case .InvertCase:
if (char.IsUpper)
char = char.ToLower;
else if (char.IsLower)
char = char.ToUpper;
}
// Get the font that can draw the char. Use the given font if no fallback is found (will draw the "missing glyph").
@@ -299,12 +416,7 @@ namespace GlitchyEngine.Renderer.Text
movedLines = 0;
}
//textBuffer.Append(char);
if(textBuffer.Length == 0)
{
textBuffer.Ptr = text.Ptr + currentIndex;
}
textBuffer.Length += @char.NextIndex - currentIndex;
chars.Add(char);
}
FlushShapeBuffer();
@@ -336,7 +448,7 @@ namespace GlitchyEngine.Renderer.Text
Renderer2D.[Friend]s_currentQuadEffect = _msdfEffect;
// TODO: oh no....
// Copy viewProjection from current effect
Matrix viewProjection = lastEffect.Variables["ViewProjection"].[Friend]GetData<Matrix>();
Matrix viewProjection = Renderer2D.[Friend]s_quadBatchEffect.Variables["ViewProjection"].[Friend]GetData<Matrix>();
_msdfEffect.Variables["ViewProjection"].SetData(viewProjection);
// TODO: this doesn't really work with fallback fonts