SkGlyphCache* GrAtlasTextBlob::setupCache(int runIndex,
const SkSurfaceProps& props,
const SkPaint& skPaint,
const SkMatrix* viewMatrix,
bool noGamma) {
GrAtlasTextBlob::Run* run = &fRuns[runIndex];
// if we have an override descriptor for the run, then we should use that
SkAutoDescriptor* desc = run->fOverrideDescriptor.get() ? run->fOverrideDescriptor.get() :
&run->fDescriptor;
skPaint.getScalerContextDescriptor(desc, props, viewMatrix, noGamma);
run->fTypeface.reset(SkSafeRef(skPaint.getTypeface()));
return SkGlyphCache::DetachCache(run->fTypeface, desc->getDesc());
}
SkGlyphCache* GrAtlasTextBlob::setupCache(int runIndex,
const SkSurfaceProps& props,
uint32_t scalerContextFlags,
const SkPaint& skPaint,
const SkMatrix* viewMatrix) {
GrAtlasTextBlob::Run* run = &fRuns[runIndex];
// if we have an override descriptor for the run, then we should use that
SkAutoDescriptor* desc = run->fOverrideDescriptor.get() ? run->fOverrideDescriptor.get() :
&run->fDescriptor;
SkScalerContextEffects effects;
skPaint.getScalerContextDescriptor(&effects, desc, props, scalerContextFlags, viewMatrix);
run->fTypeface.reset(SkSafeRef(skPaint.getTypeface()));
run->fPathEffect = sk_ref_sp(effects.fPathEffect);
run->fRasterizer = sk_ref_sp(effects.fRasterizer);
run->fMaskFilter = sk_ref_sp(effects.fMaskFilter);
return SkGlyphCache::DetachCache(run->fTypeface, effects, desc->getDesc());
}
SkExclusiveStrikePtr GrTextBlob::setupCache(int runIndex,
const SkSurfaceProps& props,
SkScalerContextFlags scalerContextFlags,
const SkPaint& skPaint,
const SkMatrix* viewMatrix) {
GrTextBlob::Run* run = &fRuns[runIndex];
// if we have an override descriptor for the run, then we should use that
SkAutoDescriptor* desc = run->fOverrideDescriptor.get() ? run->fOverrideDescriptor.get() :
&run->fDescriptor;
SkScalerContextEffects effects;
SkScalerContext::CreateDescriptorAndEffectsUsingPaint(
skPaint, &props, scalerContextFlags, viewMatrix, desc, &effects);
run->fTypeface = SkPaintPriv::RefTypefaceOrDefault(skPaint);
run->fPathEffect = sk_ref_sp(effects.fPathEffect);
run->fMaskFilter = sk_ref_sp(effects.fMaskFilter);
return SkStrikeCache::FindOrCreateStrikeExclusive(*desc->getDesc(), effects, *run->fTypeface);
}
void GrTextUtils::DrawDFText(GrAtlasTextBlob* blob, int runIndex,
GrBatchFontCache* fontCache, const SkSurfaceProps& props,
const SkPaint& skPaint, GrColor color,
const SkMatrix& viewMatrix,
const char text[], size_t byteLength,
SkScalar x, SkScalar y) {
SkASSERT(byteLength == 0 || text != nullptr);
// nothing to draw
if (text == nullptr || byteLength == 0) {
return;
}
SkPaint::GlyphCacheProc glyphCacheProc = skPaint.getGlyphCacheProc(true);
SkAutoDescriptor desc;
skPaint.getScalerContextDescriptor(&desc, props, SkPaint::FakeGamma::Off, nullptr);
SkGlyphCache* origPaintCache = SkGlyphCache::DetachCache(skPaint.getTypeface(),
desc.getDesc());
SkTArray<SkScalar> positions;
const char* textPtr = text;
SkFixed stopX = 0;
SkFixed stopY = 0;
SkFixed origin = 0;
switch (skPaint.getTextAlign()) {
case SkPaint::kRight_Align: origin = SK_Fixed1; break;
case SkPaint::kCenter_Align: origin = SK_FixedHalf; break;
case SkPaint::kLeft_Align: origin = 0; break;
}
SkAutoKern autokern;
const char* stop = text + byteLength;
while (textPtr < stop) {
// don't need x, y here, since all subpixel variants will have the
// same advance
const SkGlyph& glyph = glyphCacheProc(origPaintCache, &textPtr);
SkFixed width = glyph.fAdvanceX + autokern.adjust(glyph);
positions.push_back(SkFixedToScalar(stopX + SkFixedMul(origin, width)));
SkFixed height = glyph.fAdvanceY;
positions.push_back(SkFixedToScalar(stopY + SkFixedMul(origin, height)));
stopX += width;
stopY += height;
}
SkASSERT(textPtr == stop);
SkGlyphCache::AttachCache(origPaintCache);
// now adjust starting point depending on alignment
SkScalar alignX = SkFixedToScalar(stopX);
SkScalar alignY = SkFixedToScalar(stopY);
if (skPaint.getTextAlign() == SkPaint::kCenter_Align) {
alignX = SkScalarHalf(alignX);
alignY = SkScalarHalf(alignY);
} else if (skPaint.getTextAlign() == SkPaint::kLeft_Align) {
alignX = 0;
alignY = 0;
}
x -= alignX;
y -= alignY;
SkPoint offset = SkPoint::Make(x, y);
DrawDFPosText(blob, runIndex, fontCache, props, skPaint, color, viewMatrix, text, byteLength,
positions.begin(), 2, offset);
}
