Skip to content

Performance Enhancement: Font rendering in a single drawcall #2791

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Vwing wants to merge 1 commit into
base: master
Choose a base branch
from
+150 −3
Open

Performance Enhancement: Font rendering in a single drawcall #2791

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 12 additions & 2 deletions Assets/Scripts/Game/UserInterface/DaggerfallFont.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -135,6 +135,16 @@ public SDFFontInfo SDFInfo
get { return sdfFontInfo.Value; }
}

public Texture2D AtlasTexture
{
get { return atlasTexture; }
}

public Rect[] AtlasRects
{
get { return atlasRects; }
}

#endregion

#region Constructors
Expand Down Expand Up @@ -574,7 +584,7 @@ public uint[] GetUnicodes()

#region Private Methods

float GetSDFGlyphScalingRatio(float localYScale)
public float GetSDFGlyphScalingRatio(float localYScale)
{
return GlyphHeight / SDFInfo.pointSize * localYScale;
}
Expand Down Expand Up @@ -829,4 +839,4 @@ bool TryAddCharacter(uint code)

#endregion
}
}
}
139 changes: 138 additions & 1 deletion Assets/Scripts/Game/UserInterface/TextLabel.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -231,12 +231,149 @@ public override void Draw()
DrawLabel();
}

void DrawLabelSingleCallSDF(Color color, Vector2 offset)
{
if (glyphLayout.Count == 0)
return;

Material material = font.GetMaterial();
Vector4 scissorRect = (UseRestrictedRenderArea) ? GetRestrictedRenderScissorRect() : new Vector4(0, 1, 0, 1);
material.SetVector("_ScissorRect", scissorRect);
material.SetTexture("_MainTex", font.SDFInfo.atlasTexture);
material.SetColor(UIShaderParam._Color, color);
material.SetPass(0);

Rect totalRect = Rectangle;
float scaleX = LocalScale.x * textScale;
float scaleY = LocalScale.y * textScale;
float glyphHeight = font.GlyphHeight * scaleY;
float baseline = font.SDFInfo.baseline - 2 * scaleY;

GL.PushMatrix();
GL.LoadPixelMatrix(0, Screen.width, Screen.height, 0);
GL.Begin(GL.QUADS);
GL.Color(color);

for (int i = 0; i < glyphLayout.Count; i++)
{
GlyphLayoutData glyph = glyphLayout[i];
if (glyph.code == DaggerfallFont.SpaceCode)
continue;

if (!font.SDFInfo.glyphs.TryGetValue(glyph.code, out DaggerfallFont.SDFGlyphInfo glyphInfo))
continue;

if (glyphInfo.size.x <= 0 || glyphInfo.size.y <= 0)
continue;

float sdfScale = font.GetSDFGlyphScalingRatio(scaleY);
float w = glyphInfo.size.x * sdfScale;
float h = glyphInfo.size.y * sdfScale;
float baseX = (int)(totalRect.x + glyph.x * scaleX + HorzPixelScrollOffset * scaleX + offset.x);
float baseY = (int)(totalRect.y + glyph.y * scaleY + offset.y);
float x = baseX + glyphInfo.offset.x * sdfScale;
float y = baseY + glyphHeight + baseline - glyphInfo.offset.y * sdfScale;

Rect uv = glyphInfo.rect;
float u0 = uv.xMin;
float u1 = uv.xMax;
float v0 = uv.yMax;
float v1 = uv.yMin;

GL.TexCoord2(u0, v0); GL.Vertex3(x, y, 0);
GL.TexCoord2(u1, v0); GL.Vertex3(x + w, y, 0);
GL.TexCoord2(u1, v1); GL.Vertex3(x + w, y + h, 0);
GL.TexCoord2(u0, v1); GL.Vertex3(x, y + h, 0);
}

GL.End();
GL.PopMatrix();
}

void DrawLabelSingleCallClassic(Color color, Vector2 offset)
{
if (glyphLayout.Count == 0)
return;

Material material = DaggerfallUI.Instance.PixelFontMaterial;
Vector4 scissorRect = (UseRestrictedRenderArea) ? GetRestrictedRenderScissorRect() : new Vector4(0, 1, 0, 1);
material.SetVector("_ScissorRect", scissorRect);
material.SetTexture("_MainTex", font.AtlasTexture);
material.SetColor(UIShaderParam._Color, color);
material.SetPass(0);

Rect totalRect = Rectangle;
float scaleX = LocalScale.x * textScale;
float scaleY = LocalScale.y * textScale;
float h = Mathf.Round(font.GlyphHeight * scaleY);

GL.PushMatrix();
GL.LoadPixelMatrix(0, Screen.width, Screen.height, 0);
GL.Begin(GL.QUADS);
GL.Color(color);

for (int i = 0; i < glyphLayout.Count; i++)
{
GlyphLayoutData glyph = glyphLayout[i];
if (glyph.code == DaggerfallFont.SpaceCode)
continue;

int glyphIndex = glyph.code - font.AsciiStart;
if (glyphIndex < 0 || glyphIndex >= font.AtlasRects.Length)
continue;

Rect uv = font.AtlasRects[glyphIndex];
float w = (int)(glyph.width * scaleX);
float x = (int)(totalRect.x + glyph.x * scaleX + HorzPixelScrollOffset * scaleX + offset.x);
float y = (int)(totalRect.y + glyph.y * scaleY + offset.y);

float u0 = uv.xMin;
float u1 = uv.xMax;
float v0 = uv.yMax;
float v1 = uv.yMin;

GL.TexCoord2(u0, v0); GL.Vertex3(x, y, 0);
GL.TexCoord2(u1, v0); GL.Vertex3(x + w, y, 0);
GL.TexCoord2(u1, v1); GL.Vertex3(x + w, y + h, 0);
GL.TexCoord2(u0, v1); GL.Vertex3(x, y + h, 0);
}

GL.End();
GL.PopMatrix();
}

void DrawLabel()
{
// Exit if no layout
if (glyphLayout.Count == 0)
return;

try
{
if (!font.IsSDFCapable)
{
if (shadowPosition != Vector2.zero && shadowColor != Color.clear)
DrawLabelSingleCallClassic(shadowColor, shadowPosition * LocalScale);

DrawLabelSingleCallClassic(textColor, Vector2.zero);
}
else
{
if (shadowPosition != Vector2.zero && shadowColor != Color.clear)
DrawLabelSingleCallSDF(shadowColor, shadowPosition * LocalScale * 0.4f);

DrawLabelSingleCallSDF(textColor, Vector2.zero);
}
}
catch (Exception e)
{
Debug.LogError(e);
DrawLabelMultiCall();
}
}

void DrawLabelMultiCall()
{
// Set render area
Material material = font.GetMaterial();
Vector4 scissorRect = (UseRestrictedRenderArea) ? GetRestrictedRenderScissorRect() : new Vector4(0, 1, 0, 1);
Expand Down Expand Up @@ -654,4 +791,4 @@ void CreateNewLabelLayoutWrapped()

#endregion
}
}
}