float Font::getGlyphsAndAdvancesForSimpleText(const TextRun& run, int from, int to, GlyphBuffer& glyphBuffer, ForTextEmphasisOrNot forTextEmphasis) const
{
float initialAdvance;
WidthIterator it(this, run, 0, false, forTextEmphasis);
it.advance(from);
float beforeWidth = it.m_runWidthSoFar;
it.advance(to, &glyphBuffer);
if (glyphBuffer.isEmpty())
return 0;
float afterWidth = it.m_runWidthSoFar;
if (run.rtl()) {
it.advance(run.length());
initialAdvance = it.m_runWidthSoFar - afterWidth;
} else
initialAdvance = beforeWidth;
if (run.rtl()) {
for (int i = 0, end = glyphBuffer.size() - 1; i < glyphBuffer.size() / 2; ++i, --end)
glyphBuffer.swap(i, end);
}
return initialAdvance;
}
// Tests that filling a glyph buffer for a specific range returns the same
// results when shaping word by word as when shaping the full run in one go.
TEST_F(CachingWordShaperTest, CommonAccentRightToLeftFillGlyphBuffer)
{
// "[] []" with an accent mark over the last square bracket.
const UChar str[] = { 0x5B, 0x5D, 0x20, 0x5B, 0x301, 0x5D, 0x0 };
TextRun textRun(str, 6);
textRun.setDirection(RTL);
CachingWordShaper shaper(cache.get());
GlyphBuffer glyphBuffer;
shaper.fillGlyphBuffer(&font, textRun, fallbackFonts, &glyphBuffer, 1, 6);
OwnPtr<ShapeCache> referenceCache = adoptPtr(new ShapeCache());
CachingWordShaper referenceShaper(referenceCache.get());
GlyphBuffer referenceGlyphBuffer;
font.setCanShapeWordByWordForTesting(false);
referenceShaper.fillGlyphBuffer(&font, textRun, fallbackFonts,
&referenceGlyphBuffer, 1, 6);
ASSERT_EQ(5u, referenceGlyphBuffer.size());
ASSERT_EQ(referenceGlyphBuffer.size(), glyphBuffer.size());
ASSERT_EQ(referenceGlyphBuffer.glyphAt(0), glyphBuffer.glyphAt(0));
ASSERT_EQ(referenceGlyphBuffer.glyphAt(1), glyphBuffer.glyphAt(1));
ASSERT_EQ(referenceGlyphBuffer.glyphAt(2), glyphBuffer.glyphAt(2));
ASSERT_EQ(referenceGlyphBuffer.glyphAt(3), glyphBuffer.glyphAt(3));
ASSERT_EQ(referenceGlyphBuffer.glyphAt(4), glyphBuffer.glyphAt(4));
}
void Font::drawComplexText(GraphicsContext* context, const TextRun& run, const FloatPoint& point,
int from, int to) const
{
// This glyph buffer holds our glyphs + advances + font data for each glyph.
GlyphBuffer glyphBuffer;
float startX = point.x();
CoreTextController controller(this, run);
controller.advance(from);
float beforeWidth = controller.runWidthSoFar();
controller.advance(to, &glyphBuffer);
// We couldn't generate any glyphs for the run. Give up.
if (glyphBuffer.isEmpty())
return;
float afterWidth = controller.runWidthSoFar();
if (run.rtl()) {
startX += controller.totalWidth() + controller.finalRoundingWidth() - afterWidth;
for (int i = 0, end = glyphBuffer.size() - 1; i < glyphBuffer.size() / 2; ++i, --end)
glyphBuffer.swap(i, end);
} else
startX += beforeWidth;
// Draw the glyph buffer now at the starting point returned in startX.
FloatPoint startPoint(startX, point.y());
drawGlyphBuffer(context, glyphBuffer, run, startPoint);
}
TEST(GlyphBufferTest, ReverseForSimpleRTL) {
RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
GlyphBuffer glyphBuffer;
glyphBuffer.add(42, font1.get(), 10);
glyphBuffer.add(43, font1.get(), 15);
glyphBuffer.add(44, font2.get(), 25);
EXPECT_FALSE(glyphBuffer.isEmpty());
EXPECT_EQ(3u, glyphBuffer.size());
glyphBuffer.reverseForSimpleRTL(30, 100);
EXPECT_FALSE(glyphBuffer.isEmpty());
EXPECT_EQ(3u, glyphBuffer.size());
EXPECT_EQ(44, glyphBuffer.glyphAt(0));
EXPECT_EQ(43, glyphBuffer.glyphAt(1));
EXPECT_EQ(42, glyphBuffer.glyphAt(2));
EXPECT_EQ(font2.get(), glyphBuffer.fontDataAt(0));
EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(1));
EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(2));
EXPECT_EQ(70, glyphBuffer.xOffsetAt(0));
EXPECT_EQ(75, glyphBuffer.xOffsetAt(1));
EXPECT_EQ(85, glyphBuffer.xOffsetAt(2));
}
float Font::getGlyphsAndAdvancesForSimpleText(const TextRun& run, int from, int to, GlyphBuffer& glyphBuffer, ForTextEmphasisOrNot forTextEmphasis) const
{
WidthIterator it(this, run, 0, false, forTextEmphasis);
GlyphBuffer localGlyphBuffer;
it.advance(run.length(), &localGlyphBuffer);
if (localGlyphBuffer.isEmpty())
return 0;
float totalWidth = it.m_runWidthSoFar;
float beforeWidth = 0;
int glyphPos = 0;
for (; glyphPos < localGlyphBuffer.size() && it.m_characterIndexOfGlyph[glyphPos] < from; ++glyphPos)
beforeWidth += localGlyphBuffer.advanceAt(glyphPos).width();
int glyphFrom = glyphPos;
float afterWidth = totalWidth;
glyphPos = localGlyphBuffer.size() - 1;
for (; glyphPos >= glyphFrom && it.m_characterIndexOfGlyph[glyphPos] >= to; --glyphPos)
afterWidth -= localGlyphBuffer.advanceAt(glyphPos).width();
int glyphTo = glyphPos + 1;
glyphBuffer.add(&localGlyphBuffer, glyphFrom, glyphTo - glyphFrom);
if (run.rtl()) {
glyphBuffer.reverse(0, glyphBuffer.size());
return totalWidth - afterWidth;
}
return beforeWidth;
}
FloatRect Font::selectionRectForSimpleText(const TextRun& run, const FloatPoint& point, int h, int from, int to) const
{
GlyphBuffer glyphBuffer;
WidthIterator it(this, run);
it.advance(run.length(), &glyphBuffer);
float totalWidth = it.m_runWidthSoFar;
float beforeWidth = 0;
int glyphPos = 0;
for (; glyphPos < glyphBuffer.size() && it.m_characterIndexOfGlyph[glyphPos] < from; ++glyphPos)
beforeWidth += glyphBuffer.advanceAt(glyphPos).width();
int glyphFrom = glyphPos;
float afterWidth = totalWidth;
glyphPos = glyphBuffer.size() - 1;
for (; glyphPos >= glyphFrom && it.m_characterIndexOfGlyph[glyphPos] >= to; --glyphPos)
afterWidth -= glyphBuffer.advanceAt(glyphPos).width();
// Using roundf() rather than ceilf() for the right edge as a compromise to ensure correct caret positioning.
if (run.rtl()) {
return FloatRect(floorf(point.x() + totalWidth - afterWidth), point.y(), roundf(point.x() + totalWidth - beforeWidth) - floorf(point.x() + totalWidth - afterWidth), h);
}
return FloatRect(floorf(point.x() + beforeWidth), point.y(), roundf(point.x() + afterWidth) - floorf(point.x() + beforeWidth), h);
}
void Font::drawEmphasisMarks(GraphicsContext* context, const TextRun& run, const GlyphBuffer& glyphBuffer, const AtomicString& mark, const FloatPoint& point) const
{
FontCachePurgePreventer purgePreventer;
GlyphData markGlyphData;
if (!getEmphasisMarkGlyphData(mark, markGlyphData))
return;
const SimpleFontData* markFontData = markGlyphData.fontData;
ASSERT(markFontData);
if (!markFontData)
return;
Glyph markGlyph = markGlyphData.glyph;
Glyph spaceGlyph = markFontData->spaceGlyph();
float middleOfLastGlyph = offsetToMiddleOfGlyphAtIndex(glyphBuffer, 0);
FloatPoint startPoint(point.x() + middleOfLastGlyph - offsetToMiddleOfGlyph(markFontData, markGlyph), point.y());
GlyphBuffer markBuffer;
for (int i = 0; i + 1 < glyphBuffer.size(); ++i) {
float middleOfNextGlyph = offsetToMiddleOfGlyphAtIndex(glyphBuffer, i + 1);
float advance = glyphBuffer.advanceAt(i).width() - middleOfLastGlyph + middleOfNextGlyph;
markBuffer.add(glyphBuffer.glyphAt(i) ? markGlyph : spaceGlyph, markFontData, advance);
middleOfLastGlyph = middleOfNextGlyph;
}
markBuffer.add(glyphBuffer.glyphAt(glyphBuffer.size() - 1) ? markGlyph : spaceGlyph, markFontData, 0);
drawGlyphBuffer(context, run, markBuffer, startPoint);
}
void Font::drawSimpleText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
// This glyph buffer holds our glyphs+advances+font data for each glyph.
GlyphBuffer glyphBuffer;
float startX = point.x();
WidthIterator it(this, run);
it.advance(from);
float beforeWidth = it.m_runWidthSoFar;
it.advance(to, &glyphBuffer);
// We couldn't generate any glyphs for the run. Give up.
if (glyphBuffer.isEmpty())
return;
float afterWidth = it.m_runWidthSoFar;
if (run.rtl()) {
float finalRoundingWidth = it.m_finalRoundingWidth;
it.advance(run.length());
startX += finalRoundingWidth + it.m_runWidthSoFar - afterWidth;
} else
startX += beforeWidth;
// Swap the order of the glyphs if right-to-left.
if (run.rtl())
for (int i = 0, end = glyphBuffer.size() - 1; i < glyphBuffer.size() / 2; ++i, --end)
glyphBuffer.swap(i, end);
// Calculate the starting point of the glyphs to be displayed by adding
// all the advances up to the first glyph.
FloatPoint startPoint(startX, point.y());
drawGlyphBuffer(context, glyphBuffer, run, startPoint);
}
bool WidthIterator::advanceOneCharacter(float& width, GlyphBuffer& glyphBuffer)
{
int oldSize = glyphBuffer.size();
advance(m_currentCharacter + 1, &glyphBuffer);
float w = 0;
for (int i = oldSize; i < glyphBuffer.size(); ++i)
w += glyphBuffer.advanceAt(i);
width = w;
return glyphBuffer.size() > oldSize;
}
float Font::getGlyphsAndAdvancesForSimpleText(const TextRun& run, int from, int to, GlyphBuffer& glyphBuffer, ForTextEmphasisOrNot forTextEmphasis) const
{
float initialAdvance;
WidthIterator it(this, run, 0, false, forTextEmphasis);
// FIXME: Using separate glyph buffers for the prefix and the suffix is incorrect when kerning or
// ligatures are enabled.
GlyphBuffer localGlyphBuffer;
it.advance(from, &localGlyphBuffer);
float beforeWidth = it.m_runWidthSoFar;
it.advance(to, &glyphBuffer);
if (glyphBuffer.isEmpty())
return 0;
float afterWidth = it.m_runWidthSoFar;
if (run.rtl()) {
float finalRoundingWidth = it.m_finalRoundingWidth;
it.advance(run.length(), &localGlyphBuffer);
initialAdvance = finalRoundingWidth + it.m_runWidthSoFar - afterWidth;
} else {
initialAdvance = beforeWidth;
}
if (run.rtl())
glyphBuffer.reverse(0, glyphBuffer.size());
return initialAdvance;
}
TEST(GlyphBufferTest, StoresVerticalOffsets) {
RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
GlyphBuffer glyphBuffer;
EXPECT_FALSE(glyphBuffer.hasVerticalOffsets());
glyphBuffer.add(42, font1.get(), FloatPoint(10, 0));
glyphBuffer.add(43, font1.get(), FloatPoint(15, 0));
glyphBuffer.add(44, font2.get(), FloatPoint(12, 2));
EXPECT_FALSE(glyphBuffer.isEmpty());
EXPECT_TRUE(glyphBuffer.hasVerticalOffsets());
EXPECT_EQ(3u, glyphBuffer.size());
const float* offsets = glyphBuffer.offsets(0);
EXPECT_EQ(10, glyphBuffer.xOffsetAt(0));
EXPECT_EQ(0, glyphBuffer.yOffsetAt(0));
EXPECT_EQ(15, glyphBuffer.xOffsetAt(1));
EXPECT_EQ(0, glyphBuffer.yOffsetAt(1));
EXPECT_EQ(12, glyphBuffer.xOffsetAt(2));
EXPECT_EQ(2, glyphBuffer.yOffsetAt(2));
EXPECT_EQ(10, offsets[0]);
EXPECT_EQ(0, offsets[1]);
EXPECT_EQ(15, offsets[2]);
EXPECT_EQ(0, offsets[3]);
EXPECT_EQ(12, offsets[4]);
EXPECT_EQ(2, offsets[5]);
}
void Font::drawGlyphBuffer(GraphicsContext* context, const GlyphBuffer& glyphBuffer, const FloatPoint& point) const
{
// Draw each contiguous run of glyphs that use the same font data.
const SimpleFontData* fontData = glyphBuffer.fontDataAt(0);
FloatSize offset = glyphBuffer.offsetAt(0);
FloatPoint startPoint(point);
float nextX = startPoint.x();
int lastFrom = 0;
int nextGlyph = 0;
while (nextGlyph < glyphBuffer.size()) {
const SimpleFontData* nextFontData = glyphBuffer.fontDataAt(nextGlyph);
FloatSize nextOffset = glyphBuffer.offsetAt(nextGlyph);
if (nextFontData != fontData || nextOffset != offset) {
drawGlyphs(context, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint);
lastFrom = nextGlyph;
fontData = nextFontData;
offset = nextOffset;
startPoint.setX(nextX);
}
nextX += glyphBuffer.advanceAt(nextGlyph);
nextGlyph++;
}
drawGlyphs(context, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint);
}
int Font::offsetForPositionForSimpleText(const TextRun& run, float x, bool includePartialGlyphs) const
{
GlyphBuffer glyphBuffer;
WidthIterator it(this, run);
it.advance(run.length(), &glyphBuffer);
int characterOffset = 0;
if (run.rtl()) {
float currentX = it.m_runWidthSoFar;
for (int glyphPosition = 0; glyphPosition <= glyphBuffer.size(); ++glyphPosition) {
if (glyphPosition == glyphBuffer.size()) {
characterOffset = run.length();
break;
}
characterOffset = it.m_characterIndexOfGlyph[glyphPosition];
float glyphWidth = glyphBuffer.advanceAt(glyphPosition).width();
if (includePartialGlyphs) {
if (currentX - glyphWidth / 2.0f <= x)
break;
} else {
if (currentX - glyphWidth <= x)
break;
}
currentX -= glyphWidth;
}
} else {
float currentX = 0;
for (int glyphPosition = 0; glyphPosition <= glyphBuffer.size(); ++glyphPosition) {
if (glyphPosition == glyphBuffer.size()) {
characterOffset = run.length();
break;
}
characterOffset = it.m_characterIndexOfGlyph[glyphPosition];
float glyphWidth = glyphBuffer.advanceAt(glyphPosition).width();
if (includePartialGlyphs) {
if (currentX + glyphWidth / 2.0f >= x)
break;
} else {
if (currentX + glyphWidth >= x)
break;
}
currentX += glyphWidth;
}
}
return characterOffset;
}
DashArray FontCascade::dashesForIntersectionsWithRect(const TextRun& run, const FloatPoint& textOrigin, const FloatRect& lineExtents) const
{
if (isLoadingCustomFonts())
return DashArray();
GlyphBuffer glyphBuffer;
glyphBuffer.saveOffsetsInString();
float deltaX;
if (codePath(run) != FontCascade::Complex)
deltaX = getGlyphsAndAdvancesForSimpleText(run, 0, run.length(), glyphBuffer);
else
deltaX = getGlyphsAndAdvancesForComplexText(run, 0, run.length(), glyphBuffer);
if (!glyphBuffer.size())
return DashArray();
// FIXME: Handle SVG + non-SVG interleaved runs. https://bugs.webkit.org/show_bug.cgi?id=133778
FloatPoint origin = FloatPoint(textOrigin.x() + deltaX, textOrigin.y());
std::unique_ptr<GlyphToPathTranslator> translator = std::make_unique<CairoGlyphToPathTranslator>(run, glyphBuffer, origin);
DashArray result;
for (int index = 0; translator->containsMorePaths(); ++index, translator->advance()) {
float centerOfLine = lineExtents.y() + (lineExtents.height() / 2);
GlyphIterationState info = GlyphIterationState(FloatPoint(), FloatPoint(), centerOfLine, lineExtents.x() + lineExtents.width(), lineExtents.x());
const Font* localFontData = glyphBuffer.fontAt(index);
if (!localFontData) {
// The advances will get all messed up if we do anything other than bail here.
result.clear();
break;
}
switch (translator->underlineType()) {
case GlyphToPathTranslator::GlyphUnderlineType::SkipDescenders: {
Path path = translator->path();
path.apply([&info](const PathElement& pathElement) {
findPathIntersections(info, pathElement);
});
if (info.minX < info.maxX) {
result.append(info.minX - lineExtents.x());
result.append(info.maxX - lineExtents.x());
}
break;
}
case GlyphToPathTranslator::GlyphUnderlineType::SkipGlyph: {
std::pair<float, float> extents = translator->extents();
result.append(extents.first - lineExtents.x());
result.append(extents.second - lineExtents.x());
break;
}
case GlyphToPathTranslator::GlyphUnderlineType::DrawOverGlyph:
// Nothing to do
break;
}
}
return result;
}
void Font::drawGlyphBuffer(GraphicsContext* context, const TextRun& run, const GlyphBuffer& glyphBuffer, FloatPoint& point) const
{
#if !ENABLE(SVG_FONTS)
UNUSED_PARAM(run);
#endif
// Draw each contiguous run of glyphs that use the same font data.
const SimpleFontData* fontData = glyphBuffer.fontDataAt(0);
FloatSize offset = glyphBuffer.offsetAt(0);
FloatPoint startPoint(point.x(), point.y() - glyphBuffer.initialAdvance().height());
float nextX = startPoint.x() + glyphBuffer.advanceAt(0).width();
float nextY = startPoint.y() + glyphBuffer.advanceAt(0).height();
int lastFrom = 0;
int nextGlyph = 1;
#if ENABLE(SVG_FONTS)
TextRun::RenderingContext* renderingContext = run.renderingContext();
#endif
while (nextGlyph < glyphBuffer.size()) {
const SimpleFontData* nextFontData = glyphBuffer.fontDataAt(nextGlyph);
FloatSize nextOffset = glyphBuffer.offsetAt(nextGlyph);
if (nextFontData != fontData || nextOffset != offset) {
#if ENABLE(SVG_FONTS)
if (renderingContext && fontData->isSVGFont())
renderingContext->drawSVGGlyphs(context, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint);
else
#endif
drawGlyphs(context, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint);
lastFrom = nextGlyph;
fontData = nextFontData;
offset = nextOffset;
startPoint.setX(nextX);
startPoint.setY(nextY);
}
nextX += glyphBuffer.advanceAt(nextGlyph).width();
nextY += glyphBuffer.advanceAt(nextGlyph).height();
nextGlyph++;
}
#if ENABLE(SVG_FONTS)
if (renderingContext && fontData->isSVGFont())
renderingContext->drawSVGGlyphs(context, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint);
else {
#endif
drawGlyphs(context, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint);
point.setX(nextX);
#if ENABLE(SVG_FONTS)
}
#endif
}
float Font::getGlyphsAndAdvancesForComplexText(const TextRun& run, int from, int to, GlyphBuffer& glyphBuffer, ForTextEmphasisOrNot forTextEmphasis) const
{
float initialAdvance;
ComplexTextController controller(this, run, false, 0, forTextEmphasis);
controller.advance(from);
float beforeWidth = controller.runWidthSoFar();
controller.advance(to, &glyphBuffer);
if (glyphBuffer.isEmpty())
return 0;
float afterWidth = controller.runWidthSoFar();
if (run.rtl()) {
initialAdvance = controller.totalWidth() - afterWidth;
for (int i = 0, end = glyphBuffer.size() - 1; i < glyphBuffer.size() / 2; ++i, --end)
glyphBuffer.swap(i, end);
} else
initialAdvance = beforeWidth;
return initialAdvance;
}
TEST(GlyphBufferTest, OffsetArrayWithNonZeroIndex) {
RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
{
GlyphBuffer glyphBuffer;
glyphBuffer.add(42, font1.get(), 10);
glyphBuffer.add(43, font1.get(), 15);
glyphBuffer.add(43, font2.get(), 12);
EXPECT_FALSE(glyphBuffer.isEmpty());
EXPECT_FALSE(glyphBuffer.hasVerticalOffsets());
EXPECT_EQ(3u, glyphBuffer.size());
const float* offsets = glyphBuffer.offsets(1);
EXPECT_EQ(15, offsets[0]);
EXPECT_EQ(12, offsets[1]);
}
{
GlyphBuffer glyphBuffer;
glyphBuffer.add(42, font1.get(), FloatPoint(10, 0));
glyphBuffer.add(43, font1.get(), FloatPoint(15, 0));
glyphBuffer.add(43, font2.get(), FloatPoint(12, 2));
EXPECT_FALSE(glyphBuffer.isEmpty());
EXPECT_TRUE(glyphBuffer.hasVerticalOffsets());
EXPECT_EQ(3u, glyphBuffer.size());
const float* offsets = glyphBuffer.offsets(1);
EXPECT_EQ(15, offsets[0]);
EXPECT_EQ(0, offsets[1]);
EXPECT_EQ(12, offsets[2]);
EXPECT_EQ(2, offsets[3]);
}
}
TEST(GlyphBufferTest, StoresSimpleFontData) {
RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
GlyphBuffer glyphBuffer;
glyphBuffer.add(42, font1.get(), 10);
glyphBuffer.add(43, font1.get(), 15);
glyphBuffer.add(44, font2.get(), 12);
EXPECT_FALSE(glyphBuffer.isEmpty());
EXPECT_EQ(3u, glyphBuffer.size());
EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(0));
EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(1));
EXPECT_EQ(font2.get(), glyphBuffer.fontDataAt(2));
}
TEST(GlyphBufferTest, GlyphArrayWithOffset) {
RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
GlyphBuffer glyphBuffer;
glyphBuffer.add(42, font1.get(), 10);
glyphBuffer.add(43, font1.get(), 15);
glyphBuffer.add(44, font2.get(), 12);
EXPECT_FALSE(glyphBuffer.isEmpty());
EXPECT_EQ(3u, glyphBuffer.size());
const Glyph* glyphs = glyphBuffer.glyphs(1);
EXPECT_EQ(43, glyphs[0]);
EXPECT_EQ(44, glyphs[1]);
}
SVGGlyphToPathTranslator::SVGGlyphToPathTranslator(const GlyphBuffer& glyphBuffer, const FloatPoint& point, const SVGFontData& svgFontData, SVGFontElement& fontElement, const int from, const int numGlyphs, float scale, bool isVerticalText)
: m_glyphBuffer(glyphBuffer)
, m_svgFontData(svgFontData)
, m_currentPoint(point)
, m_glyphOrigin(m_svgFontData.horizontalOriginX() * scale, m_svgFontData.horizontalOriginY() * scale)
, m_index(from)
, m_glyph(glyphBuffer.glyphAt(m_index))
, m_fontElement(fontElement)
, m_stoppingPoint(numGlyphs + from)
, m_scale(scale)
, m_isVerticalText(isVerticalText)
{
ASSERT(glyphBuffer.size() > m_index);
if (m_glyph) {
m_svgGlyph = m_fontElement.svgGlyphForGlyph(m_glyph);
ASSERT(!m_svgGlyph.isPartOfLigature);
ASSERT(m_svgGlyph.tableEntry == m_glyph);
SVGGlyphElement::inheritUnspecifiedAttributes(m_svgGlyph, &m_svgFontData);
}
moveToNextValidGlyph();
}
TEST(GlyphBufferTest, StoresGlyphs) {
RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
RefPtr<SimpleFontData> font2 = TestSimpleFontData::create();
GlyphBuffer glyphBuffer;
glyphBuffer.add(42, font1.get(), 10);
glyphBuffer.add(43, font1.get(), 15);
glyphBuffer.add(44, font2.get(), 22);
EXPECT_FALSE(glyphBuffer.isEmpty());
EXPECT_FALSE(glyphBuffer.hasVerticalOffsets());
EXPECT_EQ(3u, glyphBuffer.size());
EXPECT_EQ(42, glyphBuffer.glyphAt(0));
EXPECT_EQ(43, glyphBuffer.glyphAt(1));
EXPECT_EQ(44, glyphBuffer.glyphAt(2));
const Glyph* glyphs = glyphBuffer.glyphs(0);
EXPECT_EQ(42, glyphs[0]);
EXPECT_EQ(43, glyphs[1]);
EXPECT_EQ(44, glyphs[2]);
}
float Font::getGlyphsAndAdvancesForComplexText(const TextRun& run, int from, int to, GlyphBuffer& glyphBuffer, ForTextEmphasisOrNot forTextEmphasis) const
{
float initialAdvance;
ComplexTextController controller(this, run, false, 0, forTextEmphasis);
controller.advance(from);
float beforeWidth = controller.runWidthSoFar();
controller.advance(to, &glyphBuffer);
if (glyphBuffer.isEmpty())
return 0;
float afterWidth = controller.runWidthSoFar();
if (run.rtl()) {
initialAdvance = controller.totalWidth() + controller.finalRoundingWidth() - afterWidth;
glyphBuffer.reverse(0, glyphBuffer.size());
} else
initialAdvance = beforeWidth;
return initialAdvance;
}
void Font::drawGlyphBuffer(GraphicsContext* context, const TextRunPaintInfo& runInfo, const GlyphBuffer& glyphBuffer, const FloatPoint& point) const
{
// Draw each contiguous run of glyphs that use the same font data.
const SimpleFontData* fontData = glyphBuffer.fontDataAt(0);
FloatPoint startPoint(point);
float nextX = startPoint.x() + glyphBuffer.advanceAt(0);
unsigned lastFrom = 0;
unsigned nextGlyph = 1;
#if ENABLE(SVG_FONTS)
TextRun::RenderingContext* renderingContext = runInfo.run.renderingContext();
#endif
while (nextGlyph < glyphBuffer.size()) {
const SimpleFontData* nextFontData = glyphBuffer.fontDataAt(nextGlyph);
if (nextFontData != fontData) {
#if ENABLE(SVG_FONTS)
if (renderingContext && fontData->isSVGFont())
renderingContext->drawSVGGlyphs(context, runInfo.run, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint);
else
#endif
drawGlyphs(context, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint, runInfo.bounds);
lastFrom = nextGlyph;
fontData = nextFontData;
startPoint.setX(nextX);
}
nextX += glyphBuffer.advanceAt(nextGlyph);
nextGlyph++;
}
#if ENABLE(SVG_FONTS)
if (renderingContext && fontData->isSVGFont())
renderingContext->drawSVGGlyphs(context, runInfo.run, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint);
else
#endif
drawGlyphs(context, fontData, glyphBuffer, lastFrom, nextGlyph - lastFrom, startPoint, runInfo.bounds);
}
TEST(GlyphBufferTest, StartsEmpty) {
GlyphBuffer glyphBuffer;
EXPECT_TRUE(glyphBuffer.isEmpty());
EXPECT_EQ(0u, glyphBuffer.size());
}
void drawTextWithSpacing(GraphicsContext* graphicsContext, const SimpleFontData* font, const wxColour& color, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point)
{
graphicsContext->save();
wxGCDC* dc = static_cast<wxGCDC*>(graphicsContext->platformContext());
wxFont* wxfont = font->getWxFont();
graphicsContext->setFillColor(graphicsContext->fillColor(), DeviceColorSpace);
CGContextRef cgContext = static_cast<CGContextRef>(dc->GetGraphicsContext()->GetNativeContext());
CGFontRef cgFont;
#ifdef wxOSX_USE_CORE_TEXT && wxOSX_USE_CORE_TEXT
cgFont = CTFontCopyGraphicsFont((CTFontRef)wxfont->OSXGetCTFont(), NULL);
#else
ATSFontRef fontRef;
fontRef = FMGetATSFontRefFromFont(wxfont->MacGetATSUFontID());
if (fontRef)
cgFont = CGFontCreateWithPlatformFont((void*)&fontRef);
#endif
CGContextSetFont(cgContext, cgFont);
CGContextSetFontSize(cgContext, wxfont->GetPointSize());
CGFloat red, green, blue, alpha;
graphicsContext->fillColor().getRGBA(red, green, blue, alpha);
CGContextSetRGBFillColor(cgContext, red, green, blue, alpha);
CGAffineTransform matrix = CGAffineTransformIdentity;
matrix.b = -matrix.b;
matrix.d = -matrix.d;
CGContextSetTextMatrix(cgContext, matrix);
CGContextSetTextPosition(cgContext, point.x(), point.y());
const FloatSize* advanceSizes = static_cast<const FloatSize*>(glyphBuffer.advances(from));
int size = glyphBuffer.size() - from;
CGSize sizes[size];
CGGlyph glyphs[numGlyphs];
// if the function doesn't exist, we're probably on tiger and need to grab the
// function under its old name, CGFontGetGlyphsForUnicodes
if (!CGFontGetGlyphsForUnichars)
CGFontGetGlyphsForUnichars = (CGFontGetGlyphsForUnicharsPtr)dlsym(RTLD_DEFAULT, "CGFontGetGlyphsForUnicodes");
// Let's make sure we got the function under one name or another!
ASSERT(CGFontGetGlyphsForUnichars);
CGFontGetGlyphsForUnichars(cgFont, glyphBuffer.glyphs(from), glyphs, numGlyphs);
for (int i = 0; i < size; i++) {
FloatSize fsize = advanceSizes[i];
sizes[i] = CGSizeMake(fsize.width(), fsize.height());
}
CGContextShowGlyphsWithAdvances(cgContext, glyphs, sizes, numGlyphs);
if (cgFont)
CGFontRelease(cgFont);
graphicsContext->restore();
}
