void SkGScalerContext::generateMetrics(SkGlyph* glyph) {
fProxy->getMetrics(glyph);
SkVector advance;
fMatrix.mapXY(SkFloatToScalar(glyph->fAdvanceX),
SkFloatToScalar(glyph->fAdvanceY), &advance);
glyph->fAdvanceX = SkScalarToFloat(advance.fX);
glyph->fAdvanceY = SkScalarToFloat(advance.fY);
SkPath path;
fProxy->getPath(*glyph, &path);
path.transform(fMatrix);
SkRect storage;
const SkPaint& paint = fFace->paint();
const SkRect& newBounds = paint.doComputeFastBounds(path.getBounds(),
&storage,
SkPaint::kFill_Style);
SkIRect ibounds;
newBounds.roundOut(&ibounds);
glyph->fLeft = ibounds.fLeft;
glyph->fTop = ibounds.fTop;
glyph->fWidth = ibounds.width();
glyph->fHeight = ibounds.height();
glyph->fMaskFormat = SkMask::kARGB32_Format;
}
static bool oval_contains(const SkRect& r, SkScalar x, SkScalar y) {
SkMatrix m;
m.setRectToRect(r, gUnitSquare, SkMatrix::kFill_ScaleToFit);
SkPoint pt;
m.mapXY(x, y, &pt);
return pt.lengthSqd() <= 1;
}
SkPoint invertPt(SkScalar x, SkScalar y) {
SkPoint pt;
SkMatrix m;
fMatrix.invert(&m);
m.mapXY(x, y, &pt);
return pt;
}
void SkGScalerContext::generateAdvance(SkGlyph* glyph) {
fProxy->getAdvance(glyph);
SkVector advance;
fMatrix.mapXY(SkFloatToScalar(glyph->fAdvanceX),
SkFloatToScalar(glyph->fAdvanceY), &advance);
glyph->fAdvanceX = SkScalarToFloat(advance.fX);
glyph->fAdvanceY = SkScalarToFloat(advance.fY);
}
void SkScalerContext_Windows::generateMetrics(SkGlyph* glyph) {
SkASSERT(fDDC);
GLYPHMETRICS gm;
sk_bzero(&gm, sizeof(gm));
glyph->fRsbDelta = 0;
glyph->fLsbDelta = 0;
// Note: need to use GGO_GRAY8_BITMAP instead of GGO_METRICS because GGO_METRICS returns a smaller
// BlackBlox; we need the bigger one in case we need the image. fAdvance is the same.
uint32_t ret = GetGlyphOutlineW(fDDC, glyph->getGlyphID(0), GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, 0, NULL, &fMat22);
if (GDI_ERROR != ret) {
if (ret == 0) {
// for white space, ret is zero and gmBlackBoxX, gmBlackBoxY are 1 incorrectly!
gm.gmBlackBoxX = gm.gmBlackBoxY = 0;
}
glyph->fWidth = gm.gmBlackBoxX;
glyph->fHeight = gm.gmBlackBoxY;
glyph->fTop = SkToS16(gm.gmptGlyphOrigin.y - gm.gmBlackBoxY);
glyph->fLeft = SkToS16(gm.gmptGlyphOrigin.x);
glyph->fAdvanceX = SkIntToFixed(gm.gmCellIncX);
glyph->fAdvanceY = -SkIntToFixed(gm.gmCellIncY);
// we outset by 1 in all dimensions, since the lcd image may bleed outside
// of the computed bounds returned by GetGlyphOutline.
// This was deduced by trial and error for small text (e.g. 8pt), so there
// maybe a more precise way to make this adjustment...
if (SkMask::kLCD16_Format == fRec.fMaskFormat) {
glyph->fWidth += 2;
glyph->fHeight += 2;
glyph->fTop -= 1;
glyph->fLeft -= 1;
}
if (fHiResFont) {
SelectObject(fDDC, fHiResFont);
sk_bzero(&gm, sizeof(gm));
ret = GetGlyphOutlineW(fDDC, glyph->getGlyphID(0), GGO_METRICS | GGO_GLYPH_INDEX, &gm, 0, NULL, &fMat22Identity);
if (GDI_ERROR != ret) {
SkPoint advance;
fHiResMatrix.mapXY(SkIntToScalar(gm.gmCellIncX), SkIntToScalar(gm.gmCellIncY), &advance);
glyph->fAdvanceX = SkScalarToFixed(advance.fX);
glyph->fAdvanceY = SkScalarToFixed(advance.fY);
}
SelectObject(fDDC, fFont);
}
} else {
glyph->fWidth = 0;
}
}
bool SkView::globalToLocal(SkScalar x, SkScalar y, SkPoint* local) const {
if (local) {
SkMatrix m;
this->localToGlobal(&m);
if (!m.invert(&m)) {
return false;
}
SkPoint p;
m.mapXY(x, y, &p);
local->set(p.fX, p.fY);
}
return true;
}
void SkRandomScalerContext::generateMetrics(SkGlyph* glyph) {
fProxy->getAdvance(glyph);
SkVector advance;
fMatrix.mapXY(SkFixedToScalar(glyph->fAdvanceX),
SkFixedToScalar(glyph->fAdvanceY), &advance);
glyph->fAdvanceX = SkScalarToFixed(advance.fX);
glyph->fAdvanceY = SkScalarToFixed(advance.fY);
SkPath path;
fProxy->getPath(*glyph, &path);
path.transform(fMatrix);
SkRect storage;
const SkPaint& paint = fFace->paint();
const SkRect& newBounds = paint.doComputeFastBounds(path.getBounds(),
&storage,
SkPaint::kFill_Style);
SkIRect ibounds;
newBounds.roundOut(&ibounds);
glyph->fLeft = ibounds.fLeft;
glyph->fTop = ibounds.fTop;
glyph->fWidth = ibounds.width();
glyph->fHeight = ibounds.height();
// Here we will change the mask format of the glyph
// NOTE this is being overridden by the base class
SkMask::Format format;
switch (glyph->getGlyphID() % 6) {
case 0:
format = SkMask::kLCD16_Format;
break;
case 1:
format = SkMask::kA8_Format;
break;
case 2:
format = SkMask::kARGB32_Format;
break;
default:
// we will fiddle with these in generate image
format = (SkMask::Format)MASK_FORMAT_UNKNOWN;
}
glyph->fMaskFormat = format;
}
SkMatrix Viewer::computeMatrix() {
SkMatrix m;
m.reset();
if (fZoomLevel) {
SkPoint center;
//m = this->getLocalMatrix();//.invert(&m);
m.mapXY(fZoomCenterX, fZoomCenterY, ¢er);
SkScalar cx = center.fX;
SkScalar cy = center.fY;
m.setTranslate(-cx, -cy);
m.postScale(fZoomScale, fZoomScale);
m.postTranslate(cx, cy);
}
m.preConcat(fGesture.localM());
m.preConcat(fGesture.globalM());
return m;
}
void GrBitmapTextContext::onDrawText(GrRenderTarget* rt, const GrClip& clip,
const GrPaint& paint, const SkPaint& skPaint,
const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
SkScalar x, SkScalar y) {
SkASSERT(byteLength == 0 || text != NULL);
// nothing to draw
if (text == NULL || byteLength == 0 /*|| fRC->isEmpty()*/) {
return;
}
this->init(rt, clip, paint, skPaint);
SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
SkAutoGlyphCache autoCache(fSkPaint, &fDeviceProperties, &viewMatrix);
SkGlyphCache* cache = autoCache.getCache();
GrFontScaler* fontScaler = GetGrFontScaler(cache);
// transform our starting point
{
SkPoint loc;
viewMatrix.mapXY(x, y, &loc);
x = loc.fX;
y = loc.fY;
}
// need to measure first
int numGlyphs;
if (fSkPaint.getTextAlign() != SkPaint::kLeft_Align) {
SkVector stopVector;
numGlyphs = MeasureText(cache, glyphCacheProc, text, byteLength, &stopVector);
SkScalar stopX = stopVector.fX;
SkScalar stopY = stopVector.fY;
if (fSkPaint.getTextAlign() == SkPaint::kCenter_Align) {
stopX = SkScalarHalf(stopX);
stopY = SkScalarHalf(stopY);
}
x -= stopX;
y -= stopY;
} else {
numGlyphs = fSkPaint.textToGlyphs(text, byteLength, NULL);
}
fTotalVertexCount = kVerticesPerGlyph*numGlyphs;
const char* stop = text + byteLength;
SkAutoKern autokern;
SkFixed fxMask = ~0;
SkFixed fyMask = ~0;
SkScalar halfSampleX, halfSampleY;
if (cache->isSubpixel()) {
halfSampleX = halfSampleY = SkFixedToScalar(SkGlyph::kSubpixelRound);
SkAxisAlignment baseline = SkComputeAxisAlignmentForHText(viewMatrix);
if (kX_SkAxisAlignment == baseline) {
fyMask = 0;
halfSampleY = SK_ScalarHalf;
} else if (kY_SkAxisAlignment == baseline) {
fxMask = 0;
halfSampleX = SK_ScalarHalf;
}
} else {
halfSampleX = halfSampleY = SK_ScalarHalf;
}
Sk48Dot16 fx = SkScalarTo48Dot16(x + halfSampleX);
Sk48Dot16 fy = SkScalarTo48Dot16(y + halfSampleY);
// if we have RGB, then we won't have any SkShaders so no need to use a localmatrix, but for
// performance reasons we just invert here instead
if (!viewMatrix.invert(&fLocalMatrix)) {
SkDebugf("Cannot invert viewmatrix\n");
return;
}
while (text < stop) {
const SkGlyph& glyph = glyphCacheProc(cache, &text, fx & fxMask, fy & fyMask);
fx += autokern.adjust(glyph);
if (glyph.fWidth) {
this->appendGlyph(GrGlyph::Pack(glyph.getGlyphID(),
glyph.getSubXFixed(),
glyph.getSubYFixed(),
GrGlyph::kCoverage_MaskStyle),
Sk48Dot16FloorToInt(fx),
Sk48Dot16FloorToInt(fy),
fontScaler);
}
fx += glyph.fAdvanceX;
fy += glyph.fAdvanceY;
}
this->finish();
}
void SkScalerContext_Windows::generateMetrics(SkGlyph* glyph) {
SkASSERT(fDDC);
if (fType == SkScalerContext_Windows::kBitmap_Type) {
SIZE size;
WORD glyphs = glyph->getGlyphID(0);
if (0 == GetTextExtentPointI(fDDC, &glyphs, 1, &size)) {
glyph->fWidth = SkToS16(fTM.tmMaxCharWidth);
} else {
glyph->fWidth = SkToS16(size.cx);
}
glyph->fHeight = SkToS16(size.cy);
glyph->fTop = SkToS16(-fTM.tmAscent);
glyph->fLeft = SkToS16(0);
glyph->fAdvanceX = SkIntToFixed(glyph->fWidth);
glyph->fAdvanceY = 0;
//Apply matrix to values.
glyph->fAdvanceY = SkFixedMul(SkFIXEDToFixed(fMat22.eM21), glyph->fAdvanceX);
glyph->fAdvanceX = SkFixedMul(SkFIXEDToFixed(fMat22.eM11), glyph->fAdvanceX);
return;
}
GLYPHMETRICS gm;
sk_bzero(&gm, sizeof(gm));
glyph->fRsbDelta = 0;
glyph->fLsbDelta = 0;
// Note: need to use GGO_GRAY8_BITMAP instead of GGO_METRICS because GGO_METRICS returns a smaller
// BlackBlox; we need the bigger one in case we need the image. fAdvance is the same.
uint32_t ret = GetGlyphOutlineW(fDDC, glyph->getGlyphID(0), GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, 0, NULL, &fMat22);
if (GDI_ERROR == ret) {
ensure_typeface_accessible(fRec.fFontID);
ret = GetGlyphOutlineW(fDDC, glyph->getGlyphID(0), GGO_GRAY8_BITMAP | GGO_GLYPH_INDEX, &gm, 0, NULL, &fMat22);
}
if (GDI_ERROR != ret) {
if (ret == 0) {
// for white space, ret is zero and gmBlackBoxX, gmBlackBoxY are 1 incorrectly!
gm.gmBlackBoxX = gm.gmBlackBoxY = 0;
}
glyph->fWidth = gm.gmBlackBoxX;
glyph->fHeight = gm.gmBlackBoxY;
glyph->fTop = SkToS16(gm.gmptGlyphOrigin.y - gm.gmBlackBoxY);
glyph->fLeft = SkToS16(gm.gmptGlyphOrigin.x);
glyph->fAdvanceX = SkIntToFixed(gm.gmCellIncX);
glyph->fAdvanceY = -SkIntToFixed(gm.gmCellIncY);
// we outset in all dimensions, since the image may bleed outside
// of the computed bounds returned by GetGlyphOutline.
// This was deduced by trial and error for small text (e.g. 8pt), so there
// maybe a more precise way to make this adjustment...
//
// This test shows us clipping the tops of some of the CJK fonts unless we
// increase the top of the box by 2, hence the height by 4. This seems to
// correspond to an embedded bitmap font, but not sure.
// LayoutTests/fast/text/backslash-to-yen-sign-euc.html
//
if (glyph->fWidth) { // don't outset an empty glyph
glyph->fWidth += 4;
glyph->fHeight += 4;
glyph->fTop -= 2;
glyph->fLeft -= 2;
}
if (fHiResFont) {
SelectObject(fDDC, fHiResFont);
sk_bzero(&gm, sizeof(gm));
ret = GetGlyphOutlineW(fDDC, glyph->getGlyphID(0), GGO_METRICS | GGO_GLYPH_INDEX, &gm, 0, NULL, &fMat22Identity);
if (GDI_ERROR != ret) {
SkPoint advance;
fHiResMatrix.mapXY(SkIntToScalar(gm.gmCellIncX), SkIntToScalar(gm.gmCellIncY), &advance);
glyph->fAdvanceX = SkScalarToFixed(advance.fX);
glyph->fAdvanceY = SkScalarToFixed(advance.fY);
}
SelectObject(fDDC, fFont);
}
} else {
glyph->zeroMetrics();
}
}
