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SpriteFont updated with option to force pixel alignment #620

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Merged
walbourn merged 2 commits into from
Mar 31, 2026
Merged

SpriteFont updated with option to force pixel alignment #620

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c8befa4
SpriteFont updated with option to force pixel alignment
walbourn Mar 31, 2026
d15ec77
SpriteFont updated with SetPixelAlignment method
walbourn Mar 31, 2026
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4 changes: 3 additions & 1 deletion Inc/SpriteFont.h
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Original file line number Diff line number Diff line change
Expand Up @@ -144,7 +144,9 @@ namespace DirectX

// Spacing properties
DIRECTX_TOOLKIT_API float __cdecl GetLineSpacing() const noexcept;
DIRECTX_TOOLKIT_API void __cdecl SetLineSpacing(float spacing);
DIRECTX_TOOLKIT_API void __cdecl SetLineSpacing(float spacing) noexcept;

DIRECTX_TOOLKIT_API void __cdecl SetPixelAlignment(bool enable) noexcept;

// Font properties
DIRECTX_TOOLKIT_API wchar_t __cdecl GetDefaultCharacter() const noexcept;
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16 changes: 15 additions & 1 deletion Src/SpriteFont.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,7 @@ class SpriteFont::Impl
std::vector<uint32_t> glyphsIndex;
Glyph const* defaultGlyph;
float lineSpacing;
bool pixelAlignment;

private:
void CreateTextureResource(_In_ ID3D11Device* device,
Expand Down Expand Up @@ -101,6 +102,7 @@ SpriteFont::Impl::Impl(
bool forceSRGB) noexcept(false) :
defaultGlyph(nullptr),
lineSpacing(0),
pixelAlignment(false),
utfBufferSize(0)
{
if (!device || !reader)
Expand Down Expand Up @@ -175,6 +177,7 @@ SpriteFont::Impl::Impl(
glyphs(iglyphs, iglyphs + glyphCount),
defaultGlyph(nullptr),
lineSpacing(ilineSpacing),
pixelAlignment(false),
utfBufferSize(0)
{
if (!itexture || !iglyphs)
Expand Down Expand Up @@ -480,6 +483,11 @@ void XM_CALLCONV SpriteFont::DrawString(_In_ SpriteBatch* spriteBatch, _In_z_ wc
offset = XMVectorMultiplyAdd(glyphRect, axisIsMirroredTable[effects & 3], offset);
}

if (pImpl->pixelAlignment)
{
offset = XMVectorRound(offset);
}

spriteBatch->Draw(pImpl->texture.Get(), position, &glyph->Subrect, color, rotation, offset, scale, effects, layerDepth);
}, true);
}
Expand Down Expand Up @@ -610,12 +618,18 @@ float SpriteFont::GetLineSpacing() const noexcept
}


void SpriteFont::SetLineSpacing(float spacing)
void SpriteFont::SetLineSpacing(float spacing) noexcept
{
pImpl->lineSpacing = spacing;
}


void SpriteFont::SetPixelAlignment(bool enable) noexcept
{
pImpl->pixelAlignment = enable;
}


// Font properties
wchar_t SpriteFont::GetDefaultCharacter() const noexcept
{
Expand Down
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