Replace D1G with a simpler implementation.
Review URL: https://codereview.chromium.org/1403573002
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@ -1423,170 +1423,120 @@ void SkDraw::drawText_asPaths(const char text[], size_t byteLength,
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#endif
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////////////////////////////////////////////////////////////////////////////////////////////////////
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struct SkDraw1Glyph {
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const SkDraw* fDraw;
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const SkRegion* fClip;
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const SkAAClip* fAAClip;
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SkBlitter* fBlitter;
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SkGlyphCache* fCache;
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const SkPaint* fPaint;
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SkIRect fClipBounds;
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/** Half the sampling frequency of the rasterized glyph in x. */
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SkScalar fHalfSampleX;
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/** Half the sampling frequency of the rasterized glyph in y. */
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SkScalar fHalfSampleY;
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/** Draws one glyph.
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*
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* The x and y are pre-biased, so implementations may just truncate them.
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* i.e. half the sampling frequency has been added.
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* e.g. 1/2 or 1/(2^(SkGlyph::kSubBits+1)) has already been added.
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* This added bias can be found in fHalfSampleX,Y.
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*/
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typedef void (*Proc)(const SkDraw1Glyph&, Sk48Dot16 x, Sk48Dot16 y, const SkGlyph&);
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class DrawOneGlyph {
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public:
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DrawOneGlyph(const SkDraw& draw, const SkPaint& paint, SkGlyphCache* cache, SkBlitter* blitter)
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: fUseRegionToDraw(UsingRegionToDraw(draw.fRC))
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, fGlyphCache(cache)
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, fBlitter(blitter)
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, fClip(fUseRegionToDraw ? &draw.fRC->bwRgn() : nullptr)
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, fDraw(draw)
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, fPaint(paint)
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, fClipBounds(PickClipBounds(draw)) { }
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Proc init(const SkDraw* draw, SkBlitter* blitter, SkGlyphCache* cache,
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const SkPaint&);
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void operator()(const SkGlyph& glyph, SkPoint position, SkPoint rounding) {
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position += rounding;
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Sk48Dot16 fx = SkScalarTo48Dot16(position.fX);
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Sk48Dot16 fy = SkScalarTo48Dot16(position.fY);
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// Prevent glyphs from being drawn outside of or straddling the edge of device space.
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if ((fx >> 16) > INT_MAX - (INT16_MAX + UINT16_MAX) ||
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(fx >> 16) < INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/) ||
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(fy >> 16) > INT_MAX - (INT16_MAX + UINT16_MAX) ||
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(fy >> 16) < INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/)) {
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return;
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}
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int left = Sk48Dot16FloorToInt(fx);
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int top = Sk48Dot16FloorToInt(fy);
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SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0);
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left += glyph.fLeft;
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top += glyph.fTop;
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int right = left + glyph.fWidth;
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int bottom = top + glyph.fHeight;
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SkMask mask;
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mask.fBounds.set(left, top, right, bottom);
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if (fUseRegionToDraw) {
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SkRegion::Cliperator clipper(*fClip, mask.fBounds);
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if (!clipper.done() && this->getImageData(glyph, &mask)) {
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const SkIRect& cr = clipper.rect();
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do {
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this->blitMask(mask, cr);
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clipper.next();
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} while (!clipper.done());
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}
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} else {
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SkIRect storage;
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SkIRect* bounds = &mask.fBounds;
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// this extra test is worth it, assuming that most of the time it succeeds
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// since we can avoid writing to storage
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if (!fClipBounds.containsNoEmptyCheck(mask.fBounds)) {
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if (!storage.intersectNoEmptyCheck(mask.fBounds, fClipBounds))
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return;
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bounds = &storage;
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}
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if (this->getImageData(glyph, &mask)) {
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this->blitMask(mask, *bounds);
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}
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}
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}
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private:
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static bool UsingRegionToDraw(const SkRasterClip* rClip) {
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return rClip->isBW() && !rClip->isRect();
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}
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static SkIRect PickClipBounds(const SkDraw& draw) {
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const SkRasterClip& rasterClip = *draw.fRC;
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if (rasterClip.isBW()) {
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return rasterClip.bwRgn().getBounds();
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} else {
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return rasterClip.aaRgn().getBounds();
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}
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}
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bool getImageData(const SkGlyph& glyph, SkMask* mask) {
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uint8_t* bits = (uint8_t*)(fGlyphCache->findImage(glyph));
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if (nullptr == bits) {
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return false; // can't rasterize glyph
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}
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mask->fImage = bits;
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mask->fRowBytes = glyph.rowBytes();
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mask->fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat);
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return true;
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}
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// call this instead of fBlitter->blitMask() since this wrapper will handle
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// the case when the mask is ARGB32_Format
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//
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void blitMask(const SkMask& mask, const SkIRect& clip) const {
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if (SkMask::kARGB32_Format == mask.fFormat) {
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this->blitMaskAsSprite(mask);
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SkBitmap bm;
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bm.installPixels(
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SkImageInfo::MakeN32Premul(mask.fBounds.width(), mask.fBounds.height()),
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(SkPMColor*)mask.fImage, mask.fRowBytes);
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fDraw.drawSprite(bm, mask.fBounds.x(), mask.fBounds.y(), fPaint);
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} else {
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fBlitter->blitMask(mask, clip);
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}
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}
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// mask must be kARGB32_Format
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void blitMaskAsSprite(const SkMask& mask) const;
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const bool fUseRegionToDraw;
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SkGlyphCache * const fGlyphCache;
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SkBlitter * const fBlitter;
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const SkRegion* const fClip;
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const SkDraw& fDraw;
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const SkPaint& fPaint;
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const SkIRect fClipBounds;
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};
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static void D1G_RectClip(const SkDraw1Glyph& state, Sk48Dot16 fx, Sk48Dot16 fy,
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const SkGlyph& glyph) {
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// Prevent glyphs from being drawn outside of or straddling the edge of device space.
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if ((fx >> 16) > INT_MAX - (INT16_MAX + UINT16_MAX) ||
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(fx >> 16) < INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/) ||
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(fy >> 16) > INT_MAX - (INT16_MAX + UINT16_MAX) ||
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(fy >> 16) < INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/))
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{
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return;
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}
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int left = Sk48Dot16FloorToInt(fx);
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int top = Sk48Dot16FloorToInt(fy);
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SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0);
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SkASSERT((nullptr == state.fClip && state.fAAClip) ||
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(state.fClip && nullptr == state.fAAClip && state.fClip->isRect()));
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left += glyph.fLeft;
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top += glyph.fTop;
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int right = left + glyph.fWidth;
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int bottom = top + glyph.fHeight;
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SkMask mask;
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SkIRect storage;
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SkIRect* bounds = &mask.fBounds;
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mask.fBounds.set(left, top, right, bottom);
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// this extra test is worth it, assuming that most of the time it succeeds
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// since we can avoid writing to storage
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if (!state.fClipBounds.containsNoEmptyCheck(left, top, right, bottom)) {
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if (!storage.intersectNoEmptyCheck(mask.fBounds, state.fClipBounds))
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return;
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bounds = &storage;
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}
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uint8_t* aa = (uint8_t*)glyph.fImage;
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if (nullptr == aa) {
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aa = (uint8_t*)state.fCache->findImage(glyph);
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if (nullptr == aa) {
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return; // can't rasterize glyph
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}
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}
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mask.fRowBytes = glyph.rowBytes();
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mask.fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat);
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mask.fImage = aa;
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state.blitMask(mask, *bounds);
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}
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static void D1G_RgnClip(const SkDraw1Glyph& state, Sk48Dot16 fx, Sk48Dot16 fy,
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const SkGlyph& glyph) {
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int left = Sk48Dot16FloorToInt(fx);
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int top = Sk48Dot16FloorToInt(fy);
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SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0);
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SkASSERT(!state.fClip->isRect());
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SkMask mask;
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left += glyph.fLeft;
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top += glyph.fTop;
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mask.fBounds.set(left, top, left + glyph.fWidth, top + glyph.fHeight);
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SkRegion::Cliperator clipper(*state.fClip, mask.fBounds);
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if (!clipper.done()) {
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const SkIRect& cr = clipper.rect();
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const uint8_t* aa = (uint8_t*)state.fCache->findImage(glyph);
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if (nullptr == aa) {
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return;
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}
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mask.fRowBytes = glyph.rowBytes();
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mask.fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat);
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mask.fImage = (uint8_t*)aa;
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do {
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state.blitMask(mask, cr);
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clipper.next();
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} while (!clipper.done());
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}
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}
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SkDraw1Glyph::Proc SkDraw1Glyph::init(const SkDraw* draw, SkBlitter* blitter, SkGlyphCache* cache,
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const SkPaint& pnt) {
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fDraw = draw;
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fBlitter = blitter;
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fCache = cache;
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fPaint = &pnt;
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if (cache->isSubpixel()) {
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fHalfSampleX = fHalfSampleY = SkFixedToScalar(SkGlyph::kSubpixelRound);
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} else {
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fHalfSampleX = fHalfSampleY = SK_ScalarHalf;
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}
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if (draw->fRC->isBW()) {
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fAAClip = nullptr;
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fClip = &draw->fRC->bwRgn();
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fClipBounds = fClip->getBounds();
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if (fClip->isRect()) {
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return D1G_RectClip;
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} else {
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return D1G_RgnClip;
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}
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} else { // aaclip
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fAAClip = &draw->fRC->aaRgn();
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fClip = nullptr;
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fClipBounds = fAAClip->getBounds();
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return D1G_RectClip;
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}
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}
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void SkDraw1Glyph::blitMaskAsSprite(const SkMask& mask) const {
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SkASSERT(SkMask::kARGB32_Format == mask.fFormat);
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SkBitmap bm;
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bm.installPixels(SkImageInfo::MakeN32Premul(mask.fBounds.width(), mask.fBounds.height()),
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(SkPMColor*)mask.fImage, mask.fRowBytes);
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fDraw->drawSprite(bm, mask.fBounds.x(), mask.fBounds.y(), *fPaint);
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}
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///////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////////////
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void SkDraw::drawText(const char text[], size_t byteLength,
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SkScalar x, SkScalar y, const SkPaint& paint) const {
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@ -1606,25 +1556,17 @@ void SkDraw::drawText(const char text[], size_t byteLength,
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return;
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}
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SkAutoGlyphCache autoCache(paint, &fDevice->surfaceProps(), fMatrix);
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SkGlyphCache* cache = autoCache.getCache();
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SkAutoGlyphCache autoCache(paint, &fDevice->surfaceProps(), fMatrix);
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SkGlyphCache* cache = autoCache.getCache();
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// The Blitter Choose needs to be live while using the blitter below.
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SkAutoBlitterChoose blitterChooser(fDst, *fMatrix, paint);
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SkAAClipBlitterWrapper wrapper(*fRC, blitterChooser.get());
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SkDraw1Glyph d1g;
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SkDraw1Glyph::Proc proc = d1g.init(this, wrapper.getBlitter(), cache, paint);
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DrawOneGlyph drawOneGlyph(*this, paint, cache, wrapper.getBlitter());
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SkFindAndPlaceGlyph::ProcessText(
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paint.getTextEncoding(), text, byteLength,
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{x, y}, *fMatrix, paint.getTextAlign(), cache,
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[&](const SkGlyph& glyph, SkPoint position, SkPoint rounding) {
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position += rounding;
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proc(d1g, SkScalarTo48Dot16(position.fX), SkScalarTo48Dot16(position.fY), glyph);
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}
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);
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{x, y}, *fMatrix, paint.getTextAlign(), cache, drawOneGlyph);
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}
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//////////////////////////////////////////////////////////////////////////////
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@ -1696,24 +1638,18 @@ void SkDraw::drawPosText(const char text[], size_t byteLength,
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return;
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}
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SkAutoGlyphCache autoCache(paint, &fDevice->surfaceProps(), fMatrix);
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SkGlyphCache* cache = autoCache.getCache();
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// The Blitter Choose needs to be live while using the blitter below.
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SkAutoBlitterChoose blitterChooser(fDst, *fMatrix, paint);
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SkAAClipBlitterWrapper wrapper(*fRC, blitterChooser.get());
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SkAutoGlyphCache autoCache(paint, &fDevice->surfaceProps(), fMatrix);
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SkGlyphCache* cache = autoCache.getCache();
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SkDraw1Glyph d1g;
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SkDraw1Glyph::Proc proc = d1g.init(this, wrapper.getBlitter(), cache, paint);
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SkPaint::Align textAlignment = paint.getTextAlign();
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DrawOneGlyph drawOneGlyph(*this, paint, cache, wrapper.getBlitter());
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SkPaint::Align textAlignment = paint.getTextAlign();
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SkFindAndPlaceGlyph::ProcessPosText(
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paint.getTextEncoding(), text, byteLength,
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offset, *fMatrix, pos, scalarsPerPosition, textAlignment, cache,
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[&](const SkGlyph& glyph, SkPoint position, SkPoint rounding) {
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position += rounding;
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proc(d1g, SkScalarTo48Dot16(position.fX), SkScalarTo48Dot16(position.fY), glyph);
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}
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);
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offset, *fMatrix, pos, scalarsPerPosition, textAlignment, cache, drawOneGlyph);
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}
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#if defined _WIN32 && _MSC_VER >= 1300
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