private void PopulateMesh(WorldSpaceRect rect, ElementScale scale, WorldSpaceMask mask, TextRenderer settings, float4 color, ref DynamicBuffer <TextData> textBuffer, ref DynamicBuffer <ControlVertexData> vertices, ref DynamicBuffer <ControlVertexIndex> triangles)
{
_VerticalAlignmentOptions verticalAlignment = (_VerticalAlignmentOptions)settings.Alignment;
_HorizontalAlignmentOptions horizontalAlignment = (_HorizontalAlignmentOptions)settings.Alignment;
var font = FontAssetFromEntity[settings.Font];
var glyphData = FontGlyphDataFromEntity[settings.Font];
float2 canvasScale = settings.Size * scale.Value / font.PointSize;
float stylePadding = 1.25f + (settings.Bold ? font.BoldStyle / 4.0f : font.NormalStyle / 4.0f);
float styleSpaceMultiplier = 1.0f + (settings.Bold ? font.BoldSpace * 0.01f : font.NormalSpace * 0.01f);
NativeList <TextUtils.TextLineInfo> lines = new NativeList <TextUtils.TextLineInfo>(Allocator.Temp);
TextUtils.CalculateLines(ref rect, canvasScale, styleSpaceMultiplier, ref glyphData, ref textBuffer, lines);
float textBlockHeight = lines.Length * font.LineHeight * canvasScale.y;
float2 alignedStartPosition = TextUtils.GetAlignedStartPosition(ref rect, ref settings, ref font, textBlockHeight, canvasScale);
float2 currentCharacter = alignedStartPosition;
int lineIdx = 0;
for (int i = 0; i < textBuffer.Length; i++)
{
if (lineIdx < lines.Length && i == lines[lineIdx].CharacterOffset)
{
currentCharacter = new float2(TextUtils.GetAlignedLinePosition(ref rect, lines[lineIdx].LineWidth, horizontalAlignment),
alignedStartPosition.y - font.LineHeight * canvasScale.y * lineIdx);
lineIdx++;
}
var character = textBuffer[i].Value;
if (character == (ushort)'\n')
{
// It's handled in GetLinesOffsets
continue;
}
if (TextUtils.GetGlyph(character, ref glyphData, out FontGlyphData ch))
{
int startIndex = vertices.Length;
float2 uv2 = new float2(ch.Scale, ch.Scale) * math.select(canvasScale, -canvasScale, settings.Bold);
float2 vMin = currentCharacter + new float2(ch.Metrics.horizontalBearingX - stylePadding, ch.Metrics.horizontalBearingY - ch.Metrics.height - stylePadding) * canvasScale;
float2 vMax = vMin + new float2(ch.Metrics.width + stylePadding * 2.0f, ch.Metrics.height + stylePadding * 2.0f) * canvasScale;
float4 uv = new float4(ch.Rect.x - stylePadding, ch.Rect.y - stylePadding, (ch.Rect.x + ch.Rect.width + stylePadding), (ch.Rect.y + ch.Rect.height + stylePadding)) / new float4(font.AtlasSize, font.AtlasSize);
RectMaskCut cut = SpriteUtility.GetRectangleMaskCut(vMin, vMax, uv.xy, uv.zw, ref mask);
var cutSize = cut.Max + cut.Min;
if (!(cutSize.x > vMax.x - vMin.x) && !(cutSize.y > vMax.y - vMin.y))
{
float4 vertexPos = new float4(vMin + cut.Min, vMax - cut.Max);
uv.xy = uv.xy + cut.UvMin;
uv.zw = uv.zw - cut.UvMax;
triangles.Add(new ControlVertexIndex()
{
Value = startIndex + 2
});
triangles.Add(new ControlVertexIndex()
{
Value = startIndex + 1
});
triangles.Add(new ControlVertexIndex()
{
Value = startIndex
});
triangles.Add(new ControlVertexIndex()
{
Value = startIndex + 3
});
triangles.Add(new ControlVertexIndex()
{
Value = startIndex + 2
});
triangles.Add(new ControlVertexIndex()
{
Value = startIndex
});
vertices.Add(new ControlVertexData()
{
Position = new float3(vertexPos.xy, 0.0f),
Normal = new float3(0.0f, 0.0f, -1.0f),
TexCoord0 = uv.xy,
TexCoord1 = uv2,
Color = color
});
vertices.Add(new ControlVertexData()
{
Position = new float3(vertexPos.zy, 0.0f),
Normal = new float3(0.0f, 0.0f, -1.0f),
TexCoord0 = uv.zy,
TexCoord1 = uv2,
Color = color
});
vertices.Add(new ControlVertexData()
{
Position = new float3(vertexPos.zw, 0.0f),
Normal = new float3(0.0f, 0.0f, -1.0f),
TexCoord0 = uv.zw,
TexCoord1 = uv2,
Color = color
});
vertices.Add(new ControlVertexData()
{
Position = new float3(vertexPos.xw, 0.0f),
Normal = new float3(0.0f, 0.0f, -1.0f),
TexCoord0 = uv.xw,
TexCoord1 = uv2,
Color = color
});
}
currentCharacter += (new float2(ch.Metrics.horizontalAdvance * styleSpaceMultiplier, 0.0f) *
canvasScale);
}
}
}
