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Fixed glyph cropping on sub-pixel positioning of text

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Added 1 pixel padding for glyph uv's  and increased glyph quads boundaries by 1 pixel so the glyphs aren't cropped when text is being scrolled with sub-pixel increments
This commit is contained in:
Radek Dutkiewicz 2018-06-11 13:00:21 +01:00 committed by Lukas Dürrenberger
parent dc0dfd601a
commit f4f7ef0d70
2 changed files with 11 additions and 8 deletions
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1
src/SFML/Graphics/Font.cpp
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@ -727,6 +727,7 @@ IntRect Font::findGlyphRect(Page& page, unsigned int width, unsigned int height)
// Make the texture 2 times bigger
Texture newTexture;
newTexture.create(textureWidth * 2, textureHeight * 2);
newTexture.setSmooth(true);
newTexture.update(page.texture);
page.texture.swap(newTexture);
}

18
src/SFML/Graphics/Text.cpp
View File

@ -50,15 +50,17 @@ namespace
// Add a glyph quad to the vertex array
void addGlyphQuad(sf::VertexArray& vertices, sf::Vector2f position, const sf::Color& color, const sf::Glyph& glyph, float italicShear, float outlineThickness = 0)
{
float left = glyph.bounds.left;
float top = glyph.bounds.top;
float right = glyph.bounds.left + glyph.bounds.width;
float bottom = glyph.bounds.top + glyph.bounds.height;
float padding = 1.0;
float u1 = static_cast<float>(glyph.textureRect.left);
float v1 = static_cast<float>(glyph.textureRect.top);
float u2 = static_cast<float>(glyph.textureRect.left + glyph.textureRect.width);
float v2 = static_cast<float>(glyph.textureRect.top + glyph.textureRect.height);
float left = glyph.bounds.left - padding;
float top = glyph.bounds.top - padding;
float right = glyph.bounds.left + glyph.bounds.width + padding;
float bottom = glyph.bounds.top + glyph.bounds.height + padding;
float u1 = static_cast<float>(glyph.textureRect.left) - padding;
float v1 = static_cast<float>(glyph.textureRect.top) - padding;
float u2 = static_cast<float>(glyph.textureRect.left + glyph.textureRect.width) + padding;
float v2 = static_cast<float>(glyph.textureRect.top + glyph.textureRect.height) + padding;
vertices.append(sf::Vertex(sf::Vector2f(position.x + left - italicShear * top - outlineThickness, position.y + top - outlineThickness), color, sf::Vector2f(u1, v1)));
vertices.append(sf::Vertex(sf::Vector2f(position.x + right - italicShear * top - outlineThickness, position.y + top - outlineThickness), color, sf::Vector2f(u2, v1)));