float SVGLengthContext::convertValueFromUserUnits( float value, SVGLengthMode mode, CSSPrimitiveValue::UnitType toUnit) const { switch (toUnit) { case CSSPrimitiveValue::UnitType::Pixels: case CSSPrimitiveValue::UnitType::Number: case CSSPrimitiveValue::UnitType::Integer: case CSSPrimitiveValue::UnitType::UserUnits: return value; case CSSPrimitiveValue::UnitType::Percentage: { FloatSize viewportSize; if (!determineViewport(viewportSize)) return 0; float dimension = dimensionForLengthMode(mode, viewportSize); if (!dimension) return 0; // LengthTypePercentage is represented with 100% = 100.0. // Good for accuracy but could eventually be changed. return value * 100 / dimension; } case CSSPrimitiveValue::UnitType::Ems: return convertValueFromUserUnitsToEMS( computedStyleForLengthResolving(m_context), value); case CSSPrimitiveValue::UnitType::Exs: return convertValueFromUserUnitsToEXS(value); case CSSPrimitiveValue::UnitType::Rems: return convertValueFromUserUnitsToEMS(rootElementStyle(m_context), value); case CSSPrimitiveValue::UnitType::Chs: return convertValueFromUserUnitsToCHS(value); case CSSPrimitiveValue::UnitType::Centimeters: return value / cssPixelsPerCentimeter; case CSSPrimitiveValue::UnitType::Millimeters: return value / cssPixelsPerMillimeter; case CSSPrimitiveValue::UnitType::Inches: return value / cssPixelsPerInch; case CSSPrimitiveValue::UnitType::Points: return value / cssPixelsPerPoint; case CSSPrimitiveValue::UnitType::Picas: return value / cssPixelsPerPica; case CSSPrimitiveValue::UnitType::ViewportWidth: case CSSPrimitiveValue::UnitType::ViewportHeight: case CSSPrimitiveValue::UnitType::ViewportMin: case CSSPrimitiveValue::UnitType::ViewportMax: return value / dimensionForViewportUnit(m_context, toUnit); default: break; } ASSERT_NOT_REACHED(); return 0; }
float SVGLengthContext::convertValueFromUserUnits(float value, SVGLengthMode mode, SVGLengthType toUnit) const { switch (toUnit) { case LengthTypeUnknown: return 0; case LengthTypeNumber: return value; case LengthTypePercentage: { FloatSize viewportSize; if (!determineViewport(viewportSize)) return 0; float dimension = dimensionForLengthMode(mode, viewportSize); if (!dimension) return 0; // LengthTypePercentage is represented with 100% = 100.0. // Good for accuracy but could eventually be changed. return value * 100 / dimension; } case LengthTypeEMS: return convertValueFromUserUnitsToEMS(computedStyleForLengthResolving(m_context), value); case LengthTypeEXS: return convertValueFromUserUnitsToEXS(value); case LengthTypeREMS: return convertValueFromUserUnitsToEMS(rootElementStyle(m_context), value); case LengthTypeCHS: return convertValueFromUserUnitsToCHS(value); case LengthTypePX: return value; case LengthTypeCM: return value / cssPixelsPerCentimeter; case LengthTypeMM: return value / cssPixelsPerMillimeter; case LengthTypeIN: return value / cssPixelsPerInch; case LengthTypePT: return value / cssPixelsPerPoint; case LengthTypePC: return value / cssPixelsPerPica; } ASSERT_NOT_REACHED(); return 0; }