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Add std::shared_ptr overloads for assigning resources while maintaining lifetime safety

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Chris Thrasher 2023-09-05 19:41:22 -06:00
parent 9cb4a68c9a
commit 6d1bcbd9eb
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6 changed files with 271 additions and 57 deletions
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46
include/SFML/Graphics/Sprite.hpp
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@ -34,6 +34,9 @@
#include <SFML/Graphics/Transformable.hpp>
#include <SFML/Graphics/Vertex.hpp>
#include <memory>
#include <variant>
namespace sf
{
@ -57,6 +60,16 @@ public:
////////////////////////////////////////////////////////////
explicit Sprite(const Texture& texture);
////////////////////////////////////////////////////////////
/// \brief Construct the sprite from a source texture
///
/// \param texture Source texture
///
/// \see setTexture
///
////////////////////////////////////////////////////////////
explicit Sprite(std::shared_ptr<const Texture> texture);
////////////////////////////////////////////////////////////
/// \brief Disallow construction from a temporary texture
///
@ -74,6 +87,17 @@ public:
////////////////////////////////////////////////////////////
Sprite(const Texture& texture, const IntRect& rectangle);
////////////////////////////////////////////////////////////
/// \brief Construct the sprite from a sub-rectangle of a source texture
///
/// \param texture Source texture
/// \param rectangle Sub-rectangle of the texture to assign to the sprite
///
/// \see setTexture, setTextureRect
///
////////////////////////////////////////////////////////////
Sprite(std::shared_ptr<const Texture> texture, const IntRect& rectangle);
////////////////////////////////////////////////////////////
/// \brief Disallow construction from a temporary texture
///
@ -101,6 +125,21 @@ public:
////////////////////////////////////////////////////////////
void setTexture(const Texture& texture, bool resetRect = false);
////////////////////////////////////////////////////////////
/// \brief Change the source texture of the sprite
///
/// Same as above but using a shared pointer to a texture to
/// which guarantees that the texture remains alive for the
/// entire lifetime of the sprite.
///
/// \param texture New texture
/// \param resetRect Should the texture rect be reset to the size of the new texture?
///
/// \see getTexture, setTextureRect
///
////////////////////////////////////////////////////////////
void setTexture(std::shared_ptr<const Texture> texture, bool resetRect = false);
////////////////////////////////////////////////////////////
/// \brief Disallow setting from a temporary texture
///
@ -222,9 +261,10 @@ private:
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
Vertex m_vertices[4]; //!< Vertices defining the sprite's geometry
const Texture* m_texture{}; //!< Texture of the sprite
IntRect m_textureRect; //!< Rectangle defining the area of the source texture to display
using TexturePtr = std::variant<const Texture*, std::shared_ptr<const Texture>>;
Vertex m_vertices[4]; //!< Vertices defining the sprite's geometry
TexturePtr m_texture; //!< Texture of the sprite
IntRect m_textureRect; //!< Rectangle defining the area of the source texture to display
};
} // namespace sf

31
include/SFML/Graphics/Text.hpp
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@ -36,6 +36,8 @@
#include <SFML/System/String.hpp>
#include <memory>
#include <variant>
#include <vector>
@ -80,6 +82,20 @@ public:
////////////////////////////////////////////////////////////
Text(const Font& font, String string = "", unsigned int characterSize = 30);
////////////////////////////////////////////////////////////
/// \brief Construct the text from a string, font and size
///
/// Construct as above but using a shared pointer to a font
/// which guarantees the font remains alive for the lifetime
/// of the text object.
///
/// \param string Text assigned to the string
/// \param font Font used to draw the string
/// \param characterSize Base size of characters, in pixels
///
////////////////////////////////////////////////////////////
Text(std::shared_ptr<const Font> font, String string = "", unsigned int characterSize = 30);
////////////////////////////////////////////////////////////
/// \brief Disallow construction from a temporary font
///
@ -124,6 +140,18 @@ public:
////////////////////////////////////////////////////////////
void setFont(const Font& font);
////////////////////////////////////////////////////////////
/// \brief Set the text's font
///
/// Same as above but using a shared pointer to a font
/// which guarantees the font remains alive for the lifetime
/// of the text object.
///
/// \see getFont
///
////////////////////////////////////////////////////////////
void setFont(std::shared_ptr<const Font> font);
////////////////////////////////////////////////////////////
/// \brief Disallow setting from a temporary font
///
@ -406,8 +434,9 @@ private:
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
using FontPtr = std::variant<const Font*, std::shared_ptr<const Font>>;
String m_string; //!< String to display
const Font* m_font{}; //!< Font used to display the string
FontPtr m_font; //!< Font used to display the string
unsigned int m_characterSize{30}; //!< Base size of characters, in pixels
float m_letterSpacingFactor{1.f}; //!< Spacing factor between letters
float m_lineSpacingFactor{1.f}; //!< Spacing factor between lines

48
src/SFML/Graphics/Sprite.cpp
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@ -42,6 +42,13 @@ Sprite::Sprite(const Texture& texture)
}
////////////////////////////////////////////////////////////
Sprite::Sprite(std::shared_ptr<const Texture> texture)
{
setTexture(std::move(texture), true);
}
////////////////////////////////////////////////////////////
Sprite::Sprite(const Texture& texture, const IntRect& rectangle)
{
@ -52,6 +59,16 @@ Sprite::Sprite(const Texture& texture, const IntRect& rectangle)
}
////////////////////////////////////////////////////////////
Sprite::Sprite(std::shared_ptr<const Texture> texture, const IntRect& rectangle)
{
// Compute the texture area
setTextureRect(rectangle);
// Assign texture
setTexture(std::move(texture), false);
}
////////////////////////////////////////////////////////////
void Sprite::setTexture(const Texture& texture, bool resetRect)
{
@ -66,6 +83,22 @@ void Sprite::setTexture(const Texture& texture, bool resetRect)
}
////////////////////////////////////////////////////////////
void Sprite::setTexture(std::shared_ptr<const Texture> texture, bool resetRect)
{
assert(texture && "Sprite::setTexture() Texture cannot be null");
// Recompute the texture area if requested
if (resetRect)
{
setTextureRect(IntRect({0, 0}, Vector2i(texture->getSize())));
}
// Assign the new texture
m_texture = std::move(texture);
}
////////////////////////////////////////////////////////////
void Sprite::setTextureRect(const IntRect& rectangle)
{
@ -92,7 +125,18 @@ void Sprite::setColor(const Color& color)
////////////////////////////////////////////////////////////
const Texture& Sprite::getTexture() const
{
return *m_texture;
static const struct Visitor
{
const sf::Texture* operator()(const sf::Texture* texture) const
{
return texture;
}
const sf::Texture* operator()(const std::shared_ptr<const sf::Texture>& texture) const
{
return texture.get();
}
} visitor;
return *std::visit(visitor, m_texture);
}
@ -133,7 +177,7 @@ void Sprite::draw(RenderTarget& target, const RenderStates& states) const
RenderStates statesCopy(states);
statesCopy.transform *= getTransform();
statesCopy.texture = m_texture;
statesCopy.texture = &getTexture();
target.draw(m_vertices, 4, PrimitiveType::TriangleStrip, statesCopy);
}

69
src/SFML/Graphics/Text.cpp
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@ -33,6 +33,7 @@
#include <algorithm>
#include <utility>
#include <cassert>
#include <cmath>
@ -104,6 +105,16 @@ m_characterSize(characterSize)
}
////////////////////////////////////////////////////////////
Text::Text(std::shared_ptr<const Font> font, String string, unsigned int characterSize) :
m_string(std::move(string)),
m_characterSize(characterSize)
{
assert(font && "Text::Text() Font cannot be null");
m_font = std::move(font);
}
////////////////////////////////////////////////////////////
void Text::setString(const String& string)
{
@ -118,7 +129,7 @@ void Text::setString(const String& string)
////////////////////////////////////////////////////////////
void Text::setFont(const Font& font)
{
if (m_font != &font)
if (&getFont() != &font)
{
m_font = &font;
m_geometryNeedUpdate = true;
@ -126,6 +137,19 @@ void Text::setFont(const Font& font)
}
////////////////////////////////////////////////////////////
void Text::setFont(std::shared_ptr<const Font> font)
{
assert(font && "Text::setFont() Font cannot be null");
if (&getFont() != font.get())
{
m_font = std::move(font);
m_geometryNeedUpdate = true;
}
}
////////////////////////////////////////////////////////////
void Text::setCharacterSize(unsigned int size)
{
@ -227,7 +251,18 @@ const String& Text::getString() const
////////////////////////////////////////////////////////////
const Font& Text::getFont() const
{
return *m_font;
static const struct Visitor
{
const sf::Font* operator()(const sf::Font* font) const
{
return font;
}
const sf::Font* operator()(const std::shared_ptr<const sf::Font>& font) const
{
return font.get();
}
} visitor;
return *std::visit(visitor, m_font);
}
@ -289,10 +324,10 @@ Vector2f Text::findCharacterPos(std::size_t index) const
// Precompute the variables needed by the algorithm
const bool isBold = m_style & Bold;
float whitespaceWidth = m_font->getGlyph(U' ', m_characterSize, isBold).advance;
float whitespaceWidth = getFont().getGlyph(U' ', m_characterSize, isBold).advance;
const float letterSpacing = (whitespaceWidth / 3.f) * (m_letterSpacingFactor - 1.f);
whitespaceWidth += letterSpacing;
const float lineSpacing = m_font->getLineSpacing(m_characterSize) * m_lineSpacingFactor;
const float lineSpacing = getFont().getLineSpacing(m_characterSize) * m_lineSpacingFactor;
// Compute the position
Vector2f position;
@ -302,7 +337,7 @@ Vector2f Text::findCharacterPos(std::size_t index) const
const std::uint32_t curChar = m_string[i];
// Apply the kerning offset
position.x += m_font->getKerning(prevChar, curChar, m_characterSize, isBold);
position.x += getFont().getKerning(prevChar, curChar, m_characterSize, isBold);
prevChar = curChar;
// Handle special characters
@ -321,7 +356,7 @@ Vector2f Text::findCharacterPos(std::size_t index) const
}
// For regular characters, add the advance offset of the glyph
position.x += m_font->getGlyph(curChar, m_characterSize, isBold).advance + letterSpacing;
position.x += getFont().getGlyph(curChar, m_characterSize, isBold).advance + letterSpacing;
}
// Transform the position to global coordinates
@ -355,7 +390,7 @@ void Text::draw(RenderTarget& target, const RenderStates& states) const
RenderStates statesCopy(states);
statesCopy.transform *= getTransform();
statesCopy.texture = &m_font->getTexture(m_characterSize);
statesCopy.texture = &getFont().getTexture(m_characterSize);
// Only draw the outline if there is something to draw
if (m_outlineThickness != 0)
@ -369,11 +404,11 @@ void Text::draw(RenderTarget& target, const RenderStates& states) const
void Text::ensureGeometryUpdate() const
{
// Do nothing, if geometry has not changed and the font texture has not changed
if (!m_geometryNeedUpdate && m_font->getTexture(m_characterSize).m_cacheId == m_fontTextureId)
if (!m_geometryNeedUpdate && getFont().getTexture(m_characterSize).m_cacheId == m_fontTextureId)
return;
// Save the current fonts texture id
m_fontTextureId = m_font->getTexture(m_characterSize).m_cacheId;
m_fontTextureId = getFont().getTexture(m_characterSize).m_cacheId;
// Mark geometry as updated
m_geometryNeedUpdate = false;
@ -392,20 +427,20 @@ void Text::ensureGeometryUpdate() const
const bool isUnderlined = m_style & Underlined;
const bool isStrikeThrough = m_style & StrikeThrough;
const float italicShear = (m_style & Italic) ? sf::degrees(12).asRadians() : 0.f;
const float underlineOffset = m_font->getUnderlinePosition(m_characterSize);
const float underlineThickness = m_font->getUnderlineThickness(m_characterSize);
const float underlineOffset = getFont().getUnderlinePosition(m_characterSize);
const float underlineThickness = getFont().getUnderlineThickness(m_characterSize);
// Compute the location of the strike through dynamically
// We use the center point of the lowercase 'x' glyph as the reference
// We reuse the underline thickness as the thickness of the strike through as well
const FloatRect xBounds = m_font->getGlyph(U'x', m_characterSize, isBold).bounds;
const FloatRect xBounds = getFont().getGlyph(U'x', m_characterSize, isBold).bounds;
const float strikeThroughOffset = xBounds.top + xBounds.height / 2.f;
// Precompute the variables needed by the algorithm
float whitespaceWidth = m_font->getGlyph(U' ', m_characterSize, isBold).advance;
float whitespaceWidth = getFont().getGlyph(U' ', m_characterSize, isBold).advance;
const float letterSpacing = (whitespaceWidth / 3.f) * (m_letterSpacingFactor - 1.f);
whitespaceWidth += letterSpacing;
const float lineSpacing = m_font->getLineSpacing(m_characterSize) * m_lineSpacingFactor;
const float lineSpacing = getFont().getLineSpacing(m_characterSize) * m_lineSpacingFactor;
float x = 0.f;
auto y = static_cast<float>(m_characterSize);
@ -424,7 +459,7 @@ void Text::ensureGeometryUpdate() const
continue;
// Apply the kerning offset
x += m_font->getKerning(prevChar, curChar, m_characterSize, isBold);
x += getFont().getKerning(prevChar, curChar, m_characterSize, isBold);
// If we're using the underlined style and there's a new line, draw a line
if (isUnderlined && (curChar == U'\n' && prevChar != U'\n'))
@ -478,14 +513,14 @@ void Text::ensureGeometryUpdate() const
// Apply the outline
if (m_outlineThickness != 0)
{
const Glyph& glyph = m_font->getGlyph(curChar, m_characterSize, isBold, m_outlineThickness);
const Glyph& glyph = getFont().getGlyph(curChar, m_characterSize, isBold, m_outlineThickness);
// Add the outline glyph to the vertices
addGlyphQuad(m_outlineVertices, Vector2f(x, y), m_outlineColor, glyph, italicShear);
}
// Extract the current glyph's description
const Glyph& glyph = m_font->getGlyph(curChar, m_characterSize, isBold);
const Glyph& glyph = getFont().getGlyph(curChar, m_characterSize, isBold);
// Add the glyph to the vertices
addGlyphQuad(m_vertices, Vector2f(x, y), m_fillColor, glyph, italicShear);

68
test/Graphics/Sprite.test.cpp
View File

@ -20,36 +20,72 @@ TEST_CASE("[Graphics] sf::Sprite", runDisplayTests())
}
const sf::Texture texture;
const auto texturePtr = std::make_shared<const sf::Texture>();
SECTION("Construction")
{
SECTION("Texture constructor")
{
const sf::Sprite sprite(texture);
CHECK(&sprite.getTexture() == &texture);
CHECK(sprite.getTextureRect() == sf::IntRect());
CHECK(sprite.getColor() == sf::Color::White);
CHECK(sprite.getLocalBounds() == sf::FloatRect());
CHECK(sprite.getGlobalBounds() == sf::FloatRect());
SECTION("const Texture&")
{
const sf::Sprite sprite(texture);
CHECK(&sprite.getTexture() == &texture);
CHECK(sprite.getTextureRect() == sf::IntRect());
CHECK(sprite.getColor() == sf::Color::White);
CHECK(sprite.getLocalBounds() == sf::FloatRect());
CHECK(sprite.getGlobalBounds() == sf::FloatRect());
}
SECTION("std::shared_ptr<const Texture>")
{
const sf::Sprite sprite(texturePtr);
CHECK(&sprite.getTexture() == texturePtr.get());
CHECK(sprite.getTextureRect() == sf::IntRect());
CHECK(sprite.getColor() == sf::Color::White);
CHECK(sprite.getLocalBounds() == sf::FloatRect());
CHECK(sprite.getGlobalBounds() == sf::FloatRect());
}
}
SECTION("Texture and rectangle constructor")
{
const sf::Sprite sprite(texture, {{0, 0}, {40, 60}});
CHECK(&sprite.getTexture() == &texture);
CHECK(sprite.getTextureRect() == sf::IntRect({0, 0}, {40, 60}));
CHECK(sprite.getColor() == sf::Color::White);
CHECK(sprite.getLocalBounds() == sf::FloatRect({0, 0}, {40, 60}));
CHECK(sprite.getGlobalBounds() == sf::FloatRect({0, 0}, {40, 60}));
SECTION("const Texture&")
{
const sf::Sprite sprite(texture, {{0, 0}, {40, 60}});
CHECK(&sprite.getTexture() == &texture);
CHECK(sprite.getTextureRect() == sf::IntRect({0, 0}, {40, 60}));
CHECK(sprite.getColor() == sf::Color::White);
CHECK(sprite.getLocalBounds() == sf::FloatRect({0, 0}, {40, 60}));
CHECK(sprite.getGlobalBounds() == sf::FloatRect({0, 0}, {40, 60}));
}
SECTION("std::shared_ptr<const Texture>")
{
const sf::Sprite sprite(texturePtr, {{0, 0}, {40, 60}});
CHECK(&sprite.getTexture() == texturePtr.get());
CHECK(sprite.getTextureRect() == sf::IntRect({0, 0}, {40, 60}));
CHECK(sprite.getColor() == sf::Color::White);
CHECK(sprite.getLocalBounds() == sf::FloatRect({0, 0}, {40, 60}));
CHECK(sprite.getGlobalBounds() == sf::FloatRect({0, 0}, {40, 60}));
}
}
}
SECTION("Set/get texture")
{
sf::Sprite sprite(texture);
const sf::Texture otherTexture;
sprite.setTexture(otherTexture);
CHECK(&sprite.getTexture() == &otherTexture);
SECTION("const Texture&")
{
sf::Sprite sprite(texturePtr);
sprite.setTexture(texture);
CHECK(&sprite.getTexture() == &texture);
}
SECTION("std::shared_ptr<const Texture>")
{
sf::Sprite sprite(texture);
sprite.setTexture(texturePtr);
CHECK(&sprite.getTexture() == texturePtr.get());
}
}
SECTION("Set/get texture rect")

66
test/Graphics/Text.test.cpp
View File

@ -19,7 +19,8 @@ TEST_CASE("[Graphics] sf::Text", runDisplayTests())
STATIC_CHECK(std::is_nothrow_move_assignable_v<sf::Text>);
}
sf::Font font;
const auto fontPtr = std::make_shared<const sf::Font>();
sf::Font font;
REQUIRE(font.loadFromFile("Graphics/tuffy.ttf"));
SECTION("Construction")
@ -78,19 +79,39 @@ TEST_CASE("[Graphics] sf::Text", runDisplayTests())
SECTION("Font, string, and character size constructor")
{
const sf::Text text(font, "abcdefghijklmnopqrstuvwxyz", 24);
CHECK(text.getString() == "abcdefghijklmnopqrstuvwxyz");
CHECK(&text.getFont() == &font);
CHECK(text.getCharacterSize() == 24);
CHECK(text.getLetterSpacing() == 1.f);
CHECK(text.getLineSpacing() == 1.f);
CHECK(text.getStyle() == sf::Text::Regular);
CHECK(text.getFillColor() == sf::Color::White);
CHECK(text.getOutlineColor() == sf::Color::Black);
CHECK(text.getOutlineThickness() == 0);
CHECK(text.findCharacterPos(0) == sf::Vector2f());
CHECK(text.getLocalBounds() == sf::FloatRect({1, 7}, {290, 22}));
CHECK(text.getGlobalBounds() == sf::FloatRect({1, 7}, {290, 22}));
SECTION("const Font&")
{
const sf::Text text(font, "abcdefghijklmnopqrstuvwxyz", 24);
CHECK(text.getString() == "abcdefghijklmnopqrstuvwxyz");
CHECK(&text.getFont() == &font);
CHECK(text.getCharacterSize() == 24);
CHECK(text.getLetterSpacing() == 1.f);
CHECK(text.getLineSpacing() == 1.f);
CHECK(text.getStyle() == sf::Text::Regular);
CHECK(text.getFillColor() == sf::Color::White);
CHECK(text.getOutlineColor() == sf::Color::Black);
CHECK(text.getOutlineThickness() == 0);
CHECK(text.findCharacterPos(0) == sf::Vector2f());
CHECK(text.getLocalBounds() == sf::FloatRect({1, 7}, {290, 22}));
CHECK(text.getGlobalBounds() == sf::FloatRect({1, 7}, {290, 22}));
}
SECTION("std::shared_ptr<const Font>")
{
const sf::Text text(fontPtr, "abcdefghijklmnopqrstuvwxyz", 24);
CHECK(text.getString() == "abcdefghijklmnopqrstuvwxyz");
CHECK(&text.getFont() == fontPtr.get());
CHECK(text.getCharacterSize() == 24);
CHECK(text.getLetterSpacing() == 1.f);
CHECK(text.getLineSpacing() == 1.f);
CHECK(text.getStyle() == sf::Text::Regular);
CHECK(text.getFillColor() == sf::Color::White);
CHECK(text.getOutlineColor() == sf::Color::Black);
CHECK(text.getOutlineThickness() == 0);
CHECK(text.findCharacterPos(0) == sf::Vector2f());
CHECK(text.getLocalBounds() == sf::FloatRect({0, 24}, {0, 0}));
CHECK(text.getGlobalBounds() == sf::FloatRect({0, 24}, {0, 0}));
}
}
}
@ -103,10 +124,19 @@ TEST_CASE("[Graphics] sf::Text", runDisplayTests())
SECTION("Set/get font")
{
sf::Text text(font);
const sf::Font otherFont;
text.setFont(otherFont);
CHECK(&text.getFont() == &otherFont);
SECTION("const Font&")
{
sf::Text text(fontPtr);
text.setFont(font);
CHECK(&text.getFont() == &font);
}
SECTION("std::shared_ptr<const Font>")
{
sf::Text text(font);
text.setFont(fontPtr);
CHECK(&text.getFont() == fontPtr.get());
}
}
SECTION("Set/get character size")