static void SampleValue(float aPortion, Animation& aAnimation, nsStyleAnimation::Value& aStart, nsStyleAnimation::Value& aEnd, Animatable* aValue) { nsStyleAnimation::Value interpolatedValue; NS_ASSERTION(aStart.GetUnit() == aEnd.GetUnit() || aStart.GetUnit() == nsStyleAnimation::eUnit_None || aEnd.GetUnit() == nsStyleAnimation::eUnit_None, "Must have same unit"); nsStyleAnimation::Interpolate(aAnimation.property(), aStart, aEnd, aPortion, interpolatedValue); if (aAnimation.property() == eCSSProperty_opacity) { *aValue = interpolatedValue.GetFloatValue(); return; } nsCSSValueList* interpolatedList = interpolatedValue.GetCSSValueListValue(); TransformData& data = aAnimation.data().get_TransformData(); nsPoint origin = data.origin(); // we expect all our transform data to arrive in css pixels, so here we must // adjust to dev pixels. double cssPerDev = double(nsDeviceContext::AppUnitsPerCSSPixel()) / double(data.appUnitsPerDevPixel()); gfxPoint3D mozOrigin = data.mozOrigin(); mozOrigin.x = mozOrigin.x * cssPerDev; mozOrigin.y = mozOrigin.y * cssPerDev; gfxPoint3D perspectiveOrigin = data.perspectiveOrigin(); perspectiveOrigin.x = perspectiveOrigin.x * cssPerDev; perspectiveOrigin.y = perspectiveOrigin.y * cssPerDev; nsDisplayTransform::FrameTransformProperties props(interpolatedList, mozOrigin, perspectiveOrigin, data.perspective()); gfx3DMatrix transform = nsDisplayTransform::GetResultingTransformMatrix(props, origin, data.appUnitsPerDevPixel(), &data.bounds()); gfxPoint3D scaledOrigin = gfxPoint3D(NS_round(NSAppUnitsToFloatPixels(origin.x, data.appUnitsPerDevPixel())), NS_round(NSAppUnitsToFloatPixels(origin.y, data.appUnitsPerDevPixel())), 0.0f); transform.Translate(scaledOrigin); InfallibleTArray<TransformFunction> functions; functions.AppendElement(TransformMatrix(transform)); *aValue = functions; }
static int32_t ConditionDimension(float aValue) { // This will exclude NaNs and too-big values. if (aValue > 1.0 && aValue <= INT32_MAX) return int32_t(NS_round(aValue)); return 0; }
static PRInt32 ConditionDimension(float aValue, PRInt32 aDefault) { // This will exclude NaNs and infinities if (aValue >= 1.0 && aValue <= 10000.0) return PRInt32(NS_round(aValue)); return aDefault; }
static gfxFloat ComputeMaxDescent(const gfxFont::Metrics& aMetrics, gfxFontGroup* aFontGroup) { gfxFloat offset = NS_floor(-aFontGroup->GetUnderlineOffset() + 0.5); gfxFloat size = NS_round(aMetrics.underlineSize); gfxFloat minDescent = NS_floor(offset + size + 0.5); return PR_MAX(minDescent, aMetrics.maxDescent); }
bool LayerTransactionParent::RecvGetTransform(PLayerParent* aParent, gfx3DMatrix* aTransform) { if (mDestroyed || !layer_manager() || layer_manager()->IsDestroyed()) { return false; } // The following code recovers the untranslated transform // from the shadow transform by undoing the translations in // AsyncCompositionManager::SampleValue. Layer* layer = cast(aParent)->AsLayer(); if (!layer) { return false; } gfx::To3DMatrix(layer->AsLayerComposite()->GetShadowTransform(), *aTransform); if (ContainerLayer* c = layer->AsContainerLayer()) { aTransform->ScalePost(1.0f/c->GetInheritedXScale(), 1.0f/c->GetInheritedYScale(), 1.0f); } float scale = 1; gfxPoint3D scaledOrigin; gfxPoint3D transformOrigin; for (uint32_t i=0; i < layer->GetAnimations().Length(); i++) { if (layer->GetAnimations()[i].data().type() == AnimationData::TTransformData) { const TransformData& data = layer->GetAnimations()[i].data().get_TransformData(); scale = data.appUnitsPerDevPixel(); scaledOrigin = gfxPoint3D(NS_round(NSAppUnitsToFloatPixels(data.origin().x, scale)), NS_round(NSAppUnitsToFloatPixels(data.origin().y, scale)), 0.0f); transformOrigin = data.transformOrigin(); break; } } aTransform->Translate(-scaledOrigin); *aTransform = nsLayoutUtils::ChangeMatrixBasis(-scaledOrigin - transformOrigin, *aTransform); return true; }
void nsSMILTimedElement::AddInstanceTimeFromCurrentTime(nsSMILTime aCurrentTime, double aOffsetSeconds, PRBool aIsBegin) { double offset = aOffsetSeconds * PR_MSEC_PER_SEC; nsSMILTime timeWithOffset = aCurrentTime + PRInt64(NS_round(offset)); nsSMILTimeValue timeVal; timeVal.SetMillis(timeWithOffset); nsSMILInstanceTime instanceTime(timeVal, nsnull, PR_TRUE); AddInstanceTime(instanceTime, aIsBegin); }
/* static */ int32_t WinUtils::LogToPhys(double aValue) { return int32_t(NS_round(aValue * LogToPhysFactor())); }
bool LayerTransactionParent::RecvGetAnimationTransform(PLayerParent* aParent, MaybeTransform* aTransform) { if (mDestroyed || !layer_manager() || layer_manager()->IsDestroyed()) { return false; } Layer* layer = cast(aParent)->AsLayer(); if (!layer) { return false; } // This method is specific to transforms applied by animation. // This is because this method uses the information stored with an animation // such as the origin of the reference frame corresponding to the layer, to // recover the untranslated transform from the shadow transform. For // transforms that are not set by animation we don't have this information // available. if (!layer->AsLayerComposite()->GetShadowTransformSetByAnimation()) { *aTransform = mozilla::void_t(); return true; } // The following code recovers the untranslated transform // from the shadow transform by undoing the translations in // AsyncCompositionManager::SampleValue. Matrix4x4 transform = layer->AsLayerComposite()->GetShadowTransform(); if (ContainerLayer* c = layer->AsContainerLayer()) { // Undo the scale transform applied by AsyncCompositionManager::SampleValue transform.ScalePost(1.0f/c->GetInheritedXScale(), 1.0f/c->GetInheritedYScale(), 1.0f); } float scale = 1; gfxPoint3D scaledOrigin; gfxPoint3D transformOrigin; for (uint32_t i=0; i < layer->GetAnimations().Length(); i++) { if (layer->GetAnimations()[i].data().type() == AnimationData::TTransformData) { const TransformData& data = layer->GetAnimations()[i].data().get_TransformData(); scale = data.appUnitsPerDevPixel(); scaledOrigin = gfxPoint3D(NS_round(NSAppUnitsToFloatPixels(data.origin().x, scale)), NS_round(NSAppUnitsToFloatPixels(data.origin().y, scale)), 0.0f); double cssPerDev = double(nsDeviceContext::AppUnitsPerCSSPixel()) / double(scale); transformOrigin = data.transformOrigin() * cssPerDev; break; } } // Undo the translation to the origin of the reference frame applied by // AsyncCompositionManager::SampleValue transform.Translate(-scaledOrigin.x, -scaledOrigin.y, -scaledOrigin.z); // Undo the rebasing applied by // nsDisplayTransform::GetResultingTransformMatrixInternal gfxPoint3D basis = -scaledOrigin - transformOrigin; transform.ChangeBasis(basis.x, basis.y, basis.z); // Convert to CSS pixels (this undoes the operations performed by // nsStyleTransformMatrix::ProcessTranslatePart which is called from // nsDisplayTransform::GetResultingTransformMatrix) double devPerCss = double(scale) / double(nsDeviceContext::AppUnitsPerCSSPixel()); transform._41 *= devPerCss; transform._42 *= devPerCss; transform._43 *= devPerCss; *aTransform = transform; return true; }
void gfxFT2LockedFace::GetMetrics(gfxFont::Metrics* aMetrics, uint32_t* aSpaceGlyph) { NS_PRECONDITION(aMetrics != nullptr, "aMetrics must not be NULL"); NS_PRECONDITION(aSpaceGlyph != nullptr, "aSpaceGlyph must not be NULL"); if (MOZ_UNLIKELY(!mFace)) { // No face. This unfortunate situation might happen if the font // file is (re)moved at the wrong time. const gfxFloat emHeight = mGfxFont->GetStyle()->size; aMetrics->emHeight = emHeight; aMetrics->maxAscent = aMetrics->emAscent = 0.8 * emHeight; aMetrics->maxDescent = aMetrics->emDescent = 0.2 * emHeight; aMetrics->maxHeight = emHeight; aMetrics->internalLeading = 0.0; aMetrics->externalLeading = 0.2 * emHeight; const gfxFloat spaceWidth = 0.5 * emHeight; aMetrics->spaceWidth = spaceWidth; aMetrics->maxAdvance = spaceWidth; aMetrics->aveCharWidth = spaceWidth; aMetrics->zeroOrAveCharWidth = spaceWidth; const gfxFloat xHeight = 0.5 * emHeight; aMetrics->xHeight = xHeight; aMetrics->superscriptOffset = xHeight; aMetrics->subscriptOffset = xHeight; const gfxFloat underlineSize = emHeight / 14.0; aMetrics->underlineSize = underlineSize; aMetrics->underlineOffset = -underlineSize; aMetrics->strikeoutOffset = 0.25 * emHeight; aMetrics->strikeoutSize = underlineSize; *aSpaceGlyph = 0; return; } const FT_Size_Metrics& ftMetrics = mFace->size->metrics; gfxFloat emHeight; // Scale for vertical design metric conversion: pixels per design unit. // If this remains at 0.0, we can't use metrics from OS/2 etc. gfxFloat yScale = 0.0; if (FT_IS_SCALABLE(mFace)) { // Prefer FT_Size_Metrics::x_scale to x_ppem as x_ppem does not // have subpixel accuracy. // // FT_Size_Metrics::y_scale is in 16.16 fixed point format. Its // (fractional) value is a factor that converts vertical metrics from // design units to units of 1/64 pixels, so that the result may be // interpreted as pixels in 26.6 fixed point format. yScale = FLOAT_FROM_26_6(FLOAT_FROM_16_16(ftMetrics.y_scale)); emHeight = mFace->units_per_EM * yScale; } else { // Not scalable. emHeight = ftMetrics.y_ppem; // FT_Face doc says units_per_EM and a bunch of following fields // are "only relevant to scalable outlines". If it's an sfnt, // we can get units_per_EM from the 'head' table instead; otherwise, // we don't have a unitsPerEm value so we can't compute/use yScale. const TT_Header* head = static_cast<TT_Header*>(FT_Get_Sfnt_Table(mFace, ft_sfnt_head)); if (head) { gfxFloat emUnit = head->Units_Per_EM; yScale = emHeight / emUnit; } } TT_OS2 *os2 = static_cast<TT_OS2*>(FT_Get_Sfnt_Table(mFace, ft_sfnt_os2)); aMetrics->maxAscent = FLOAT_FROM_26_6(ftMetrics.ascender); aMetrics->maxDescent = -FLOAT_FROM_26_6(ftMetrics.descender); aMetrics->maxAdvance = FLOAT_FROM_26_6(ftMetrics.max_advance); gfxFloat lineHeight; if (os2 && os2->sTypoAscender && yScale > 0.0) { aMetrics->emAscent = os2->sTypoAscender * yScale; aMetrics->emDescent = -os2->sTypoDescender * yScale; FT_Short typoHeight = os2->sTypoAscender - os2->sTypoDescender + os2->sTypoLineGap; lineHeight = typoHeight * yScale; // maxAscent/maxDescent get used for frame heights, and some fonts // don't have the HHEA table ascent/descent set (bug 279032). // We use NS_round here to parallel the pixel-rounded values that // freetype gives us for ftMetrics.ascender/descender. aMetrics->maxAscent = std::max(aMetrics->maxAscent, NS_round(aMetrics->emAscent)); aMetrics->maxDescent = std::max(aMetrics->maxDescent, NS_round(aMetrics->emDescent)); } else { aMetrics->emAscent = aMetrics->maxAscent; aMetrics->emDescent = aMetrics->maxDescent; lineHeight = FLOAT_FROM_26_6(ftMetrics.height); } cairo_text_extents_t extents; *aSpaceGlyph = GetCharExtents(' ', &extents); if (*aSpaceGlyph) { aMetrics->spaceWidth = extents.x_advance; } else { aMetrics->spaceWidth = aMetrics->maxAdvance; // guess } aMetrics->zeroOrAveCharWidth = 0.0; if (GetCharExtents('0', &extents)) { aMetrics->zeroOrAveCharWidth = extents.x_advance; } // Prefering a measured x over sxHeight because sxHeight doesn't consider // hinting, but maybe the x extents are not quite right in some fancy // script fonts. CSS 2.1 suggests possibly using the height of an "o", // which would have a more consistent glyph across fonts. if (GetCharExtents('x', &extents) && extents.y_bearing < 0.0) { aMetrics->xHeight = -extents.y_bearing; aMetrics->aveCharWidth = extents.x_advance; } else { if (os2 && os2->sxHeight && yScale > 0.0) { aMetrics->xHeight = os2->sxHeight * yScale; } else { // CSS 2.1, section 4.3.2 Lengths: "In the cases where it is // impossible or impractical to determine the x-height, a value of // 0.5em should be used." aMetrics->xHeight = 0.5 * emHeight; } aMetrics->aveCharWidth = 0.0; // updated below } // aveCharWidth is used for the width of text input elements so be // liberal rather than conservative in the estimate. if (os2 && os2->xAvgCharWidth) { // Round to pixels as this is compared with maxAdvance to guess // whether this is a fixed width font. gfxFloat avgCharWidth = ScaleRoundDesignUnits(os2->xAvgCharWidth, ftMetrics.x_scale); aMetrics->aveCharWidth = std::max(aMetrics->aveCharWidth, avgCharWidth); } aMetrics->aveCharWidth = std::max(aMetrics->aveCharWidth, aMetrics->zeroOrAveCharWidth); if (aMetrics->aveCharWidth == 0.0) { aMetrics->aveCharWidth = aMetrics->spaceWidth; } if (aMetrics->zeroOrAveCharWidth == 0.0) { aMetrics->zeroOrAveCharWidth = aMetrics->aveCharWidth; } // Apparently hinting can mean that max_advance is not always accurate. aMetrics->maxAdvance = std::max(aMetrics->maxAdvance, aMetrics->aveCharWidth); // gfxFont::Metrics::underlineOffset is the position of the top of the // underline. // // FT_FaceRec documentation describes underline_position as "the // center of the underlining stem". This was the original definition // of the PostScript metric, but in the PostScript table of OpenType // fonts the metric is "the top of the underline" // (http://www.microsoft.com/typography/otspec/post.htm), and FreeType // (up to version 2.3.7) doesn't make any adjustment. // // Therefore get the underline position directly from the table // ourselves when this table exists. Use FreeType's metrics for // other (including older PostScript) fonts. if (mFace->underline_position && mFace->underline_thickness && yScale > 0.0) { aMetrics->underlineSize = mFace->underline_thickness * yScale; TT_Postscript *post = static_cast<TT_Postscript*> (FT_Get_Sfnt_Table(mFace, ft_sfnt_post)); if (post && post->underlinePosition) { aMetrics->underlineOffset = post->underlinePosition * yScale; } else { aMetrics->underlineOffset = mFace->underline_position * yScale + 0.5 * aMetrics->underlineSize; } } else { // No underline info. // Imitate Pango. aMetrics->underlineSize = emHeight / 14.0; aMetrics->underlineOffset = -aMetrics->underlineSize; } if (os2 && os2->yStrikeoutSize && os2->yStrikeoutPosition && yScale > 0.0) { aMetrics->strikeoutSize = os2->yStrikeoutSize * yScale; aMetrics->strikeoutOffset = os2->yStrikeoutPosition * yScale; } else { // No strikeout info. aMetrics->strikeoutSize = aMetrics->underlineSize; // Use OpenType spec's suggested position for Roman font. aMetrics->strikeoutOffset = emHeight * 409.0 / 2048.0 + 0.5 * aMetrics->strikeoutSize; } SnapLineToPixels(aMetrics->strikeoutOffset, aMetrics->strikeoutSize); if (os2 && os2->ySuperscriptYOffset) { gfxFloat val = ScaleRoundDesignUnits(os2->ySuperscriptYOffset, ftMetrics.y_scale); aMetrics->superscriptOffset = std::max(1.0, val); } else { aMetrics->superscriptOffset = aMetrics->xHeight; } if (os2 && os2->ySubscriptYOffset) { gfxFloat val = ScaleRoundDesignUnits(os2->ySubscriptYOffset, ftMetrics.y_scale); // some fonts have the incorrect sign. val = fabs(val); aMetrics->subscriptOffset = std::max(1.0, val); } else { aMetrics->subscriptOffset = aMetrics->xHeight; } aMetrics->maxHeight = aMetrics->maxAscent + aMetrics->maxDescent; // Make the line height an integer number of pixels so that lines will be // equally spaced (rather than just being snapped to pixels, some up and // some down). Layout calculates line height from the emHeight + // internalLeading + externalLeading, but first each of these is rounded // to layout units. To ensure that the result is an integer number of // pixels, round each of the components to pixels. aMetrics->emHeight = floor(emHeight + 0.5); // maxHeight will normally be an integer, but round anyway in case // FreeType is configured differently. aMetrics->internalLeading = floor(aMetrics->maxHeight - aMetrics->emHeight + 0.5); // Text input boxes currently don't work well with lineHeight // significantly less than maxHeight (with Verdana, for example). lineHeight = floor(std::max(lineHeight, aMetrics->maxHeight) + 0.5); aMetrics->externalLeading = lineHeight - aMetrics->internalLeading - aMetrics->emHeight; // Ensure emAscent + emDescent == emHeight gfxFloat sum = aMetrics->emAscent + aMetrics->emDescent; aMetrics->emAscent = sum > 0.0 ? aMetrics->emAscent * aMetrics->emHeight / sum : 0.0; aMetrics->emDescent = aMetrics->emHeight - aMetrics->emAscent; }
static bool WithinEpsilonOfInteger(gfxFloat aX, gfxFloat aEpsilon) { return fabs(NS_round(aX) - aX) <= fabs(aEpsilon); }