glyph_metrics_t QFontEngineDirectWrite::boundingBox(glyph_t g)
{
if (m_directWriteFontFace == 0)
return glyph_metrics_t();
UINT16 glyphIndex = g;
DWRITE_GLYPH_METRICS glyphMetrics;
HRESULT hr = m_directWriteFontFace->GetDesignGlyphMetrics(&glyphIndex, 1, &glyphMetrics);
if (SUCCEEDED(hr)) {
QFixed advanceWidth = DESIGN_TO_LOGICAL(glyphMetrics.advanceWidth);
QFixed leftSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.leftSideBearing);
QFixed rightSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.rightSideBearing);
QFixed advanceHeight = DESIGN_TO_LOGICAL(glyphMetrics.advanceHeight);
QFixed verticalOriginY = DESIGN_TO_LOGICAL(glyphMetrics.verticalOriginY);
if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) {
advanceWidth = advanceWidth.round();
advanceHeight = advanceHeight.round();
}
QFixed width = advanceWidth - leftSideBearing - rightSideBearing;
return glyph_metrics_t(-leftSideBearing, -verticalOriginY,
width, m_ascent + m_descent,
advanceWidth, advanceHeight);
} else {
qErrnoWarning("QFontEngineDirectWrite::boundingBox: GetDesignGlyphMetrics failed");
}
return glyph_metrics_t();
}
glyph_metrics_t QWindowsFontEngineDirectWrite::boundingBox(glyph_t g)
{
UINT16 glyphIndex = g;
DWRITE_GLYPH_METRICS glyphMetrics;
HRESULT hr = m_directWriteFontFace->GetDesignGlyphMetrics(&glyphIndex, 1, &glyphMetrics);
if (SUCCEEDED(hr)) {
QFixed advanceWidth = DESIGN_TO_LOGICAL(glyphMetrics.advanceWidth);
QFixed leftSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.leftSideBearing);
QFixed rightSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.rightSideBearing);
QFixed advanceHeight = DESIGN_TO_LOGICAL(glyphMetrics.advanceHeight);
QFixed verticalOriginY = DESIGN_TO_LOGICAL(glyphMetrics.verticalOriginY);
QFixed topSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.topSideBearing);
QFixed bottomSideBearing = DESIGN_TO_LOGICAL(glyphMetrics.bottomSideBearing);
if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) {
advanceWidth = advanceWidth.round();
advanceHeight = advanceHeight.round();
}
QFixed width = advanceWidth - leftSideBearing - rightSideBearing;
QFixed height = advanceHeight - topSideBearing - bottomSideBearing;
return glyph_metrics_t(leftSideBearing,
-verticalOriginY + topSideBearing,
width,
height,
advanceWidth,
advanceHeight);
} else {
qErrnoWarning("%s: GetDesignGlyphMetrics failed", __FUNCTION__);
}
return glyph_metrics_t();
}
glyph_metrics_t QFontEngineS60::boundingBox(const QGlyphLayout &glyphs)
{
if (glyphs.numGlyphs == 0)
return glyph_metrics_t();
QFixed w = 0;
for (int i = 0; i < glyphs.numGlyphs; ++i)
w += glyphs.effectiveAdvance(i);
return glyph_metrics_t(0, -ascent(), w, ascent()+descent()+1, w, 0);
}
glyph_metrics_t QFontEngineDirectWrite::alphaMapBoundingBox(glyph_t glyph, QFixed subPixelPosition,
const QTransform &matrix,
GlyphFormat /*format*/)
{
glyph_metrics_t bbox = QFontEngine::boundingBox(glyph, matrix); // To get transformed advance
UINT16 glyphIndex = glyph;
FLOAT glyphAdvance = 0;
DWRITE_GLYPH_OFFSET glyphOffset;
glyphOffset.advanceOffset = 0;
glyphOffset.ascenderOffset = 0;
DWRITE_GLYPH_RUN glyphRun;
glyphRun.fontFace = m_directWriteFontFace;
glyphRun.fontEmSize = fontDef.pixelSize;
glyphRun.glyphCount = 1;
glyphRun.glyphIndices = &glyphIndex;
glyphRun.glyphAdvances = &glyphAdvance;
glyphRun.isSideways = false;
glyphRun.bidiLevel = 0;
glyphRun.glyphOffsets = &glyphOffset;
DWRITE_MATRIX transform;
transform.dx = subPixelPosition.toReal();
transform.dy = 0;
transform.m11 = matrix.m11();
transform.m12 = matrix.m12();
transform.m21 = matrix.m21();
transform.m22 = matrix.m22();
IDWriteGlyphRunAnalysis *glyphAnalysis = NULL;
HRESULT hr = m_directWriteFactory->CreateGlyphRunAnalysis(
&glyphRun,
1.0f,
&transform,
DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC,
DWRITE_MEASURING_MODE_NATURAL,
0.0, 0.0,
&glyphAnalysis
);
if (SUCCEEDED(hr)) {
RECT rect;
glyphAnalysis->GetAlphaTextureBounds(DWRITE_TEXTURE_CLEARTYPE_3x1, &rect);
glyphAnalysis->Release();
return glyph_metrics_t(rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top,
bbox.xoff, bbox.yoff);
} else {
return glyph_metrics_t();
}
}
glyph_metrics_t QFontEngineDirectWrite::boundingBox(const QGlyphLayout &glyphs)
{
if (glyphs.numGlyphs == 0)
return glyph_metrics_t();
bool round = fontDef.styleStrategy & QFont::ForceIntegerMetrics;
QFixed w = 0;
for (int i = 0; i < glyphs.numGlyphs; ++i) {
w += round ? glyphs.effectiveAdvance(i).round() : glyphs.effectiveAdvance(i);
}
return glyph_metrics_t(0, -m_ascent, w - lastRightBearing(glyphs), m_ascent + m_descent, w, 0);
}
glyph_metrics_t QFontEngineMac::boundingBox(const QGlyphLayout *glyphs, int numGlyphs)
{
QFixed w;
const QGlyphLayout *end = glyphs + numGlyphs;
while(end > glyphs)
w += (--end)->advance.x;
return glyph_metrics_t(0, -(ascent()), w, ascent()+descent(), w, 0);
}