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 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();
}
}
void QPAGenerator::writeTaggedQFixed(QFontEngineQPA::HeaderTag tag, QFixed value)
{
writeUInt16(tag);
writeUInt16(sizeof(quint32));
writeUInt32(value.value());
}
QFixed QFontEngineS60::emSquareSize() const
{
const QFixed unitsPerEm = m_extras->unitsPerEm();
return unitsPerEm.toInt() == -1 ?
QFixed::fromReal(m_originalFontSizeInPixels) : unitsPerEm;
}
QImage QFontEngineDirectWrite::imageForGlyph(glyph_t t,
QFixed subPixelPosition,
int margin,
const QTransform &xform)
{
UINT16 glyphIndex = t;
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 = xform.m11();
transform.m12 = xform.m12();
transform.m21 = xform.m21();
transform.m22 = xform.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);
rect.left -= margin;
rect.top -= margin;
rect.right += margin;
rect.bottom += margin;
int width = rect.right - rect.left;
int height = rect.bottom - rect.top;
int size = width * height * 3;
if (size > 0) {
BYTE *alphaValues = new BYTE[size];
qMemSet(alphaValues, size, 0);
hr = glyphAnalysis->CreateAlphaTexture(DWRITE_TEXTURE_CLEARTYPE_3x1,
&rect,
alphaValues,
size);
if (SUCCEEDED(hr)) {
QImage img(width, height, QImage::Format_RGB32);
img.fill(0xffffffff);
for (int y=0; y<height; ++y) {
uint *dest = reinterpret_cast<uint *>(img.scanLine(y));
BYTE *src = alphaValues + width * 3 * y;
for (int x=0; x<width; ++x) {
dest[x] = *(src) << 16
| *(src + 1) << 8
| *(src + 2);
src += 3;
}
}
delete[] alphaValues;
glyphAnalysis->Release();
return img;
} else {
delete[] alphaValues;
glyphAnalysis->Release();
qErrnoWarning("QFontEngineDirectWrite::imageForGlyph: CreateAlphaTexture failed");
}
}
} else {
qErrnoWarning("QFontEngineDirectWrite::imageForGlyph: CreateGlyphRunAnalysis failed");
}
return QImage();
}
QImage QWindowsFontEngineDirectWrite::imageForGlyph(glyph_t t,
QFixed subPixelPosition,
int margin,
const QTransform &xform)
{
glyph_metrics_t metrics = QFontEngine::boundingBox(t, xform);
int width = (metrics.width + margin * 2 + 4).ceil().toInt() ;
int height = (metrics.height + margin * 2 + 4).ceil().toInt();
UINT16 glyphIndex = t;
FLOAT glyphAdvance = metrics.xoff.toReal();
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;
QFixed x = margin - metrics.x.floor() + subPixelPosition;
QFixed y = margin - metrics.y.floor();
DWRITE_MATRIX transform;
transform.dx = x.toReal();
transform.dy = y.toReal();
transform.m11 = xform.m11();
transform.m12 = xform.m12();
transform.m21 = xform.m21();
transform.m22 = xform.m22();
IDWriteGlyphRunAnalysis *glyphAnalysis = NULL;
HRESULT hr = m_fontEngineData->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;
rect.left = 0;
rect.top = 0;
rect.right = width;
rect.bottom = height;
int size = width * height * 3;
BYTE *alphaValues = new BYTE[size];
memset(alphaValues, size, 0);
hr = glyphAnalysis->CreateAlphaTexture(DWRITE_TEXTURE_CLEARTYPE_3x1,
&rect,
alphaValues,
size);
if (SUCCEEDED(hr)) {
QImage img(width, height, QImage::Format_RGB32);
img.fill(0xffffffff);
for (int y=0; y<height; ++y) {
uint *dest = reinterpret_cast<uint *>(img.scanLine(y));
BYTE *src = alphaValues + width * 3 * y;
for (int x=0; x<width; ++x) {
dest[x] = *(src) << 16
| *(src + 1) << 8
| *(src + 2);
src += 3;
}
}
delete[] alphaValues;
glyphAnalysis->Release();
return img;
} else {
delete[] alphaValues;
glyphAnalysis->Release();
qErrnoWarning("%s: CreateAlphaTexture failed", __FUNCTION__);
}
} else {
qErrnoWarning("%s: CreateGlyphRunAnalysis failed", __FUNCTION__);
}
return QImage();
}
