| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/core/SkBlitter.h" |
| |
| #include "include/core/SkColor.h" |
| #include "include/core/SkColorFilter.h" |
| #include "include/core/SkString.h" |
| #include "include/private/SkColorData.h" |
| #include "include/private/SkTo.h" |
| #include "src/core/SkAntiRun.h" |
| #include "src/core/SkArenaAlloc.h" |
| #include "src/core/SkColorSpacePriv.h" |
| #include "src/core/SkMask.h" |
| #include "src/core/SkMaskFilterBase.h" |
| #include "src/core/SkPaintPriv.h" |
| #include "src/core/SkReadBuffer.h" |
| #include "src/core/SkRegionPriv.h" |
| #include "src/core/SkTLazy.h" |
| #include "src/core/SkUtils.h" |
| #include "src/core/SkWriteBuffer.h" |
| #include "src/core/SkXfermodeInterpretation.h" |
| #include "src/shaders/SkShaderBase.h" |
| |
| SkBlitter::~SkBlitter() {} |
| |
| bool SkBlitter::isNullBlitter() const { return false; } |
| |
| const SkPixmap* SkBlitter::justAnOpaqueColor(uint32_t* value) { |
| return nullptr; |
| } |
| |
| /* |
| void SkBlitter::blitH(int x, int y, int width) { |
| SkDEBUGFAIL("unimplemented"); |
| } |
| |
| |
| void SkBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], |
| const int16_t runs[]) { |
| SkDEBUGFAIL("unimplemented"); |
| } |
| */ |
| |
| inline static SkAlpha ScalarToAlpha(SkScalar a) { |
| SkAlpha alpha = (SkAlpha)(a * 255); |
| return alpha > 247 ? 0xFF : alpha < 8 ? 0 : alpha; |
| } |
| |
| void SkBlitter::blitFatAntiRect(const SkRect& rect) { |
| SkIRect bounds = rect.roundOut(); |
| SkASSERT(bounds.width() >= 3); |
| |
| // skbug.com/7813 |
| // To ensure consistency of the threaded backend (a rect that's considered fat in the init-once |
| // phase must also be considered fat in the draw phase), we have to deal with rects with small |
| // heights because the horizontal tiling in the threaded backend may change the height. |
| // |
| // This also implies that we cannot do vertical tiling unless we can blit any rect (not just the |
| // fat one.) |
| if (bounds.height() == 0) { |
| return; |
| } |
| |
| int runSize = bounds.width() + 1; // +1 so we can set runs[bounds.width()] = 0 |
| void* storage = this->allocBlitMemory(runSize * (sizeof(int16_t) + sizeof(SkAlpha))); |
| int16_t* runs = reinterpret_cast<int16_t*>(storage); |
| SkAlpha* alphas = reinterpret_cast<SkAlpha*>(runs + runSize); |
| |
| runs[0] = 1; |
| runs[1] = bounds.width() - 2; |
| runs[bounds.width() - 1] = 1; |
| runs[bounds.width()] = 0; |
| |
| SkScalar partialL = bounds.fLeft + 1 - rect.fLeft; |
| SkScalar partialR = rect.fRight - (bounds.fRight - 1); |
| SkScalar partialT = bounds.fTop + 1 - rect.fTop; |
| SkScalar partialB = rect.fBottom - (bounds.fBottom - 1); |
| |
| if (bounds.height() == 1) { |
| partialT = rect.fBottom - rect.fTop; |
| } |
| |
| alphas[0] = ScalarToAlpha(partialL * partialT); |
| alphas[1] = ScalarToAlpha(partialT); |
| alphas[bounds.width() - 1] = ScalarToAlpha(partialR * partialT); |
| this->blitAntiH(bounds.fLeft, bounds.fTop, alphas, runs); |
| |
| if (bounds.height() > 2) { |
| this->blitAntiRect(bounds.fLeft, bounds.fTop + 1, bounds.width() - 2, bounds.height() - 2, |
| ScalarToAlpha(partialL), ScalarToAlpha(partialR)); |
| } |
| |
| if (bounds.height() > 1) { |
| alphas[0] = ScalarToAlpha(partialL * partialB); |
| alphas[1] = ScalarToAlpha(partialB); |
| alphas[bounds.width() - 1] = ScalarToAlpha(partialR * partialB); |
| this->blitAntiH(bounds.fLeft, bounds.fBottom - 1, alphas, runs); |
| } |
| } |
| |
| void SkBlitter::blitV(int x, int y, int height, SkAlpha alpha) { |
| if (alpha == 255) { |
| this->blitRect(x, y, 1, height); |
| } else { |
| int16_t runs[2]; |
| runs[0] = 1; |
| runs[1] = 0; |
| |
| while (--height >= 0) { |
| this->blitAntiH(x, y++, &alpha, runs); |
| } |
| } |
| } |
| |
| void SkBlitter::blitRect(int x, int y, int width, int height) { |
| SkASSERT(width > 0); |
| while (--height >= 0) { |
| this->blitH(x, y++, width); |
| } |
| } |
| |
| /// Default implementation doesn't check for easy optimizations |
| /// such as alpha == 255; also uses blitV(), which some subclasses |
| /// may not support. |
| void SkBlitter::blitAntiRect(int x, int y, int width, int height, |
| SkAlpha leftAlpha, SkAlpha rightAlpha) { |
| if (leftAlpha > 0) { // we may send in x = -1 with leftAlpha = 0 |
| this->blitV(x, y, height, leftAlpha); |
| } |
| x++; |
| if (width > 0) { |
| this->blitRect(x, y, width, height); |
| x += width; |
| } |
| if (rightAlpha > 0) { |
| this->blitV(x, y, height, rightAlpha); |
| } |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static inline void bits_to_runs(SkBlitter* blitter, int x, int y, |
| const uint8_t bits[], |
| uint8_t left_mask, ptrdiff_t rowBytes, |
| uint8_t right_mask) { |
| int inFill = 0; |
| int pos = 0; |
| |
| while (--rowBytes >= 0) { |
| uint8_t b = *bits++ & left_mask; |
| if (rowBytes == 0) { |
| b &= right_mask; |
| } |
| |
| for (uint8_t test = 0x80U; test != 0; test >>= 1) { |
| if (b & test) { |
| if (!inFill) { |
| pos = x; |
| inFill = true; |
| } |
| } else { |
| if (inFill) { |
| blitter->blitH(pos, y, x - pos); |
| inFill = false; |
| } |
| } |
| x += 1; |
| } |
| left_mask = 0xFFU; |
| } |
| |
| // final cleanup |
| if (inFill) { |
| blitter->blitH(pos, y, x - pos); |
| } |
| } |
| |
| // maskBitCount is the number of 1's to place in the mask. It must be in the range between 1 and 8. |
| static uint8_t generate_right_mask(int maskBitCount) { |
| return static_cast<uint8_t>((0xFF00U >> maskBitCount) & 0xFF); |
| } |
| |
| void SkBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { |
| SkASSERT(mask.fBounds.contains(clip)); |
| |
| if (mask.fFormat == SkMask::kLCD16_Format) { |
| return; // needs to be handled by subclass |
| } |
| |
| if (mask.fFormat == SkMask::kBW_Format) { |
| int cx = clip.fLeft; |
| int cy = clip.fTop; |
| int maskLeft = mask.fBounds.fLeft; |
| int maskRowBytes = mask.fRowBytes; |
| int height = clip.height(); |
| |
| const uint8_t* bits = mask.getAddr1(cx, cy); |
| |
| SkDEBUGCODE(const uint8_t* endOfImage = |
| mask.fImage + (mask.fBounds.height() - 1) * maskRowBytes |
| + ((mask.fBounds.width() + 7) >> 3)); |
| |
| if (cx == maskLeft && clip.fRight == mask.fBounds.fRight) { |
| while (--height >= 0) { |
| int affectedRightBit = mask.fBounds.width() - 1; |
| ptrdiff_t rowBytes = (affectedRightBit >> 3) + 1; |
| SkASSERT(bits + rowBytes <= endOfImage); |
| U8CPU rightMask = generate_right_mask((affectedRightBit & 7) + 1); |
| bits_to_runs(this, cx, cy, bits, 0xFF, rowBytes, rightMask); |
| bits += maskRowBytes; |
| cy += 1; |
| } |
| } else { |
| // Bits is calculated as the offset into the mask at the point {cx, cy} therefore, all |
| // addressing into the bit mask is relative to that point. Since this is an address |
| // calculated from a arbitrary bit in that byte, calculate the left most bit. |
| int bitsLeft = cx - ((cx - maskLeft) & 7); |
| |
| // Everything is relative to the bitsLeft. |
| int leftEdge = cx - bitsLeft; |
| SkASSERT(leftEdge >= 0); |
| int rightEdge = clip.fRight - bitsLeft; |
| SkASSERT(rightEdge > leftEdge); |
| |
| // Calculate left byte and mask |
| const uint8_t* leftByte = bits; |
| U8CPU leftMask = 0xFFU >> (leftEdge & 7); |
| |
| // Calculate right byte and mask |
| int affectedRightBit = rightEdge - 1; |
| const uint8_t* rightByte = bits + (affectedRightBit >> 3); |
| U8CPU rightMask = generate_right_mask((affectedRightBit & 7) + 1); |
| |
| // leftByte and rightByte are byte locations therefore, to get a count of bytes the |
| // code must add one. |
| ptrdiff_t rowBytes = rightByte - leftByte + 1; |
| |
| while (--height >= 0) { |
| SkASSERT(bits + rowBytes <= endOfImage); |
| bits_to_runs(this, bitsLeft, cy, bits, leftMask, rowBytes, rightMask); |
| bits += maskRowBytes; |
| cy += 1; |
| } |
| } |
| } else { |
| int width = clip.width(); |
| SkAutoSTMalloc<64, int16_t> runStorage(width + 1); |
| int16_t* runs = runStorage.get(); |
| const uint8_t* aa = mask.getAddr8(clip.fLeft, clip.fTop); |
| |
| sk_memset16((uint16_t*)runs, 1, width); |
| runs[width] = 0; |
| |
| int height = clip.height(); |
| int y = clip.fTop; |
| while (--height >= 0) { |
| this->blitAntiH(clip.fLeft, y, aa, runs); |
| aa += mask.fRowBytes; |
| y += 1; |
| } |
| } |
| } |
| |
| /////////////////////// these guys are not virtual, just a helpers |
| |
| void SkBlitter::blitMaskRegion(const SkMask& mask, const SkRegion& clip) { |
| if (clip.quickReject(mask.fBounds)) { |
| return; |
| } |
| |
| SkRegion::Cliperator clipper(clip, mask.fBounds); |
| |
| while (!clipper.done()) { |
| const SkIRect& cr = clipper.rect(); |
| this->blitMask(mask, cr); |
| clipper.next(); |
| } |
| } |
| |
| void SkBlitter::blitRectRegion(const SkIRect& rect, const SkRegion& clip) { |
| SkRegion::Cliperator clipper(clip, rect); |
| |
| while (!clipper.done()) { |
| const SkIRect& cr = clipper.rect(); |
| this->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height()); |
| clipper.next(); |
| } |
| } |
| |
| void SkBlitter::blitRegion(const SkRegion& clip) { |
| SkRegionPriv::VisitSpans(clip, [this](const SkIRect& r) { |
| this->blitRect(r.left(), r.top(), r.width(), r.height()); |
| }); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkNullBlitter::blitH(int x, int y, int width) {} |
| |
| void SkNullBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], |
| const int16_t runs[]) {} |
| |
| void SkNullBlitter::blitV(int x, int y, int height, SkAlpha alpha) {} |
| |
| void SkNullBlitter::blitRect(int x, int y, int width, int height) {} |
| |
| void SkNullBlitter::blitMask(const SkMask& mask, const SkIRect& clip) {} |
| |
| const SkPixmap* SkNullBlitter::justAnOpaqueColor(uint32_t* value) { |
| return nullptr; |
| } |
| |
| bool SkNullBlitter::isNullBlitter() const { return true; } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static int compute_anti_width(const int16_t runs[]) { |
| int width = 0; |
| |
| for (;;) { |
| int count = runs[0]; |
| |
| SkASSERT(count >= 0); |
| if (count == 0) { |
| break; |
| } |
| width += count; |
| runs += count; |
| } |
| return width; |
| } |
| |
| static inline bool y_in_rect(int y, const SkIRect& rect) { |
| return (unsigned)(y - rect.fTop) < (unsigned)rect.height(); |
| } |
| |
| static inline bool x_in_rect(int x, const SkIRect& rect) { |
| return (unsigned)(x - rect.fLeft) < (unsigned)rect.width(); |
| } |
| |
| void SkRectClipBlitter::blitH(int left, int y, int width) { |
| SkASSERT(width > 0); |
| |
| if (!y_in_rect(y, fClipRect)) { |
| return; |
| } |
| |
| int right = left + width; |
| |
| if (left < fClipRect.fLeft) { |
| left = fClipRect.fLeft; |
| } |
| if (right > fClipRect.fRight) { |
| right = fClipRect.fRight; |
| } |
| |
| width = right - left; |
| if (width > 0) { |
| fBlitter->blitH(left, y, width); |
| } |
| } |
| |
| void SkRectClipBlitter::blitAntiH(int left, int y, const SkAlpha aa[], |
| const int16_t runs[]) { |
| if (!y_in_rect(y, fClipRect) || left >= fClipRect.fRight) { |
| return; |
| } |
| |
| int x0 = left; |
| int x1 = left + compute_anti_width(runs); |
| |
| if (x1 <= fClipRect.fLeft) { |
| return; |
| } |
| |
| SkASSERT(x0 < x1); |
| if (x0 < fClipRect.fLeft) { |
| int dx = fClipRect.fLeft - x0; |
| SkAlphaRuns::BreakAt((int16_t*)runs, (uint8_t*)aa, dx); |
| runs += dx; |
| aa += dx; |
| x0 = fClipRect.fLeft; |
| } |
| |
| SkASSERT(x0 < x1 && runs[x1 - x0] == 0); |
| if (x1 > fClipRect.fRight) { |
| x1 = fClipRect.fRight; |
| SkAlphaRuns::BreakAt((int16_t*)runs, (uint8_t*)aa, x1 - x0); |
| ((int16_t*)runs)[x1 - x0] = 0; |
| } |
| |
| SkASSERT(x0 < x1 && runs[x1 - x0] == 0); |
| SkASSERT(compute_anti_width(runs) == x1 - x0); |
| |
| fBlitter->blitAntiH(x0, y, aa, runs); |
| } |
| |
| void SkRectClipBlitter::blitV(int x, int y, int height, SkAlpha alpha) { |
| SkASSERT(height > 0); |
| |
| if (!x_in_rect(x, fClipRect)) { |
| return; |
| } |
| |
| int y0 = y; |
| int y1 = y + height; |
| |
| if (y0 < fClipRect.fTop) { |
| y0 = fClipRect.fTop; |
| } |
| if (y1 > fClipRect.fBottom) { |
| y1 = fClipRect.fBottom; |
| } |
| |
| if (y0 < y1) { |
| fBlitter->blitV(x, y0, y1 - y0, alpha); |
| } |
| } |
| |
| void SkRectClipBlitter::blitRect(int left, int y, int width, int height) { |
| SkIRect r; |
| |
| r.setLTRB(left, y, left + width, y + height); |
| if (r.intersect(fClipRect)) { |
| fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); |
| } |
| } |
| |
| void SkRectClipBlitter::blitAntiRect(int left, int y, int width, int height, |
| SkAlpha leftAlpha, SkAlpha rightAlpha) { |
| SkIRect r; |
| |
| // The *true* width of the rectangle blitted is width+2: |
| r.setLTRB(left, y, left + width + 2, y + height); |
| if (r.intersect(fClipRect)) { |
| if (r.fLeft != left) { |
| SkASSERT(r.fLeft > left); |
| leftAlpha = 255; |
| } |
| if (r.fRight != left + width + 2) { |
| SkASSERT(r.fRight < left + width + 2); |
| rightAlpha = 255; |
| } |
| if (255 == leftAlpha && 255 == rightAlpha) { |
| fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); |
| } else if (1 == r.width()) { |
| if (r.fLeft == left) { |
| fBlitter->blitV(r.fLeft, r.fTop, r.height(), leftAlpha); |
| } else { |
| SkASSERT(r.fLeft == left + width + 1); |
| fBlitter->blitV(r.fLeft, r.fTop, r.height(), rightAlpha); |
| } |
| } else { |
| fBlitter->blitAntiRect(r.fLeft, r.fTop, r.width() - 2, r.height(), |
| leftAlpha, rightAlpha); |
| } |
| } |
| } |
| |
| void SkRectClipBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { |
| SkASSERT(mask.fBounds.contains(clip)); |
| |
| SkIRect r = clip; |
| |
| if (r.intersect(fClipRect)) { |
| fBlitter->blitMask(mask, r); |
| } |
| } |
| |
| const SkPixmap* SkRectClipBlitter::justAnOpaqueColor(uint32_t* value) { |
| return fBlitter->justAnOpaqueColor(value); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkRgnClipBlitter::blitH(int x, int y, int width) { |
| SkRegion::Spanerator span(*fRgn, y, x, x + width); |
| int left, right; |
| |
| while (span.next(&left, &right)) { |
| SkASSERT(left < right); |
| fBlitter->blitH(left, y, right - left); |
| } |
| } |
| |
| void SkRgnClipBlitter::blitAntiH(int x, int y, const SkAlpha aa[], |
| const int16_t runs[]) { |
| int width = compute_anti_width(runs); |
| SkRegion::Spanerator span(*fRgn, y, x, x + width); |
| int left, right; |
| SkDEBUGCODE(const SkIRect& bounds = fRgn->getBounds();) |
| |
| int prevRite = x; |
| while (span.next(&left, &right)) { |
| SkASSERT(x <= left); |
| SkASSERT(left < right); |
| SkASSERT(left >= bounds.fLeft && right <= bounds.fRight); |
| |
| SkAlphaRuns::Break((int16_t*)runs, (uint8_t*)aa, left - x, right - left); |
| |
| // now zero before left |
| if (left > prevRite) { |
| int index = prevRite - x; |
| ((uint8_t*)aa)[index] = 0; // skip runs after right |
| ((int16_t*)runs)[index] = SkToS16(left - prevRite); |
| } |
| |
| prevRite = right; |
| } |
| |
| if (prevRite > x) { |
| ((int16_t*)runs)[prevRite - x] = 0; |
| |
| if (x < 0) { |
| int skip = runs[0]; |
| SkASSERT(skip >= -x); |
| aa += skip; |
| runs += skip; |
| x += skip; |
| } |
| fBlitter->blitAntiH(x, y, aa, runs); |
| } |
| } |
| |
| void SkRgnClipBlitter::blitV(int x, int y, int height, SkAlpha alpha) { |
| SkIRect bounds; |
| bounds.setXYWH(x, y, 1, height); |
| |
| SkRegion::Cliperator iter(*fRgn, bounds); |
| |
| while (!iter.done()) { |
| const SkIRect& r = iter.rect(); |
| SkASSERT(bounds.contains(r)); |
| |
| fBlitter->blitV(x, r.fTop, r.height(), alpha); |
| iter.next(); |
| } |
| } |
| |
| void SkRgnClipBlitter::blitRect(int x, int y, int width, int height) { |
| SkIRect bounds; |
| bounds.setXYWH(x, y, width, height); |
| |
| SkRegion::Cliperator iter(*fRgn, bounds); |
| |
| while (!iter.done()) { |
| const SkIRect& r = iter.rect(); |
| SkASSERT(bounds.contains(r)); |
| |
| fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); |
| iter.next(); |
| } |
| } |
| |
| void SkRgnClipBlitter::blitAntiRect(int x, int y, int width, int height, |
| SkAlpha leftAlpha, SkAlpha rightAlpha) { |
| // The *true* width of the rectangle to blit is width + 2 |
| SkIRect bounds; |
| bounds.setXYWH(x, y, width + 2, height); |
| |
| SkRegion::Cliperator iter(*fRgn, bounds); |
| |
| while (!iter.done()) { |
| const SkIRect& r = iter.rect(); |
| SkASSERT(bounds.contains(r)); |
| SkASSERT(r.fLeft >= x); |
| SkASSERT(r.fRight <= x + width + 2); |
| |
| SkAlpha effectiveLeftAlpha = (r.fLeft == x) ? leftAlpha : 255; |
| SkAlpha effectiveRightAlpha = (r.fRight == x + width + 2) ? |
| rightAlpha : 255; |
| |
| if (255 == effectiveLeftAlpha && 255 == effectiveRightAlpha) { |
| fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); |
| } else if (1 == r.width()) { |
| if (r.fLeft == x) { |
| fBlitter->blitV(r.fLeft, r.fTop, r.height(), |
| effectiveLeftAlpha); |
| } else { |
| SkASSERT(r.fLeft == x + width + 1); |
| fBlitter->blitV(r.fLeft, r.fTop, r.height(), |
| effectiveRightAlpha); |
| } |
| } else { |
| fBlitter->blitAntiRect(r.fLeft, r.fTop, r.width() - 2, r.height(), |
| effectiveLeftAlpha, effectiveRightAlpha); |
| } |
| iter.next(); |
| } |
| } |
| |
| |
| void SkRgnClipBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { |
| SkASSERT(mask.fBounds.contains(clip)); |
| |
| SkRegion::Cliperator iter(*fRgn, clip); |
| const SkIRect& r = iter.rect(); |
| SkBlitter* blitter = fBlitter; |
| |
| while (!iter.done()) { |
| blitter->blitMask(mask, r); |
| iter.next(); |
| } |
| } |
| |
| const SkPixmap* SkRgnClipBlitter::justAnOpaqueColor(uint32_t* value) { |
| return fBlitter->justAnOpaqueColor(value); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkBlitter* SkBlitterClipper::apply(SkBlitter* blitter, const SkRegion* clip, |
| const SkIRect* ir) { |
| if (clip) { |
| const SkIRect& clipR = clip->getBounds(); |
| |
| if (clip->isEmpty() || (ir && !SkIRect::Intersects(clipR, *ir))) { |
| blitter = &fNullBlitter; |
| } else if (clip->isRect()) { |
| if (ir == nullptr || !clipR.contains(*ir)) { |
| fRectBlitter.init(blitter, clipR); |
| blitter = &fRectBlitter; |
| } |
| } else { |
| fRgnBlitter.init(blitter, clip); |
| blitter = &fRgnBlitter; |
| } |
| } |
| return blitter; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "src/core/SkCoreBlitters.h" |
| |
| // hack for testing, not to be exposed to clients |
| bool gSkForceRasterPipelineBlitter; |
| |
| bool SkBlitter::UseRasterPipelineBlitter(const SkPixmap& device, const SkPaint& paint, |
| const SkMatrix& matrix) { |
| if (gSkForceRasterPipelineBlitter) { |
| return true; |
| } |
| #if 0 || defined(SK_FORCE_RASTER_PIPELINE_BLITTER) |
| return true; |
| #else |
| |
| const SkMaskFilterBase* mf = as_MFB(paint.getMaskFilter()); |
| |
| // The legacy blitters cannot handle any of these complex features (anymore). |
| if (device.alphaType() == kUnpremul_SkAlphaType || |
| matrix.hasPerspective() || |
| paint.getColorFilter() || |
| paint.getBlendMode() > SkBlendMode::kLastCoeffMode || |
| paint.getFilterQuality() == kHigh_SkFilterQuality || |
| (mf && mf->getFormat() == SkMask::k3D_Format)) { |
| return true; |
| } |
| |
| // All the real legacy fast paths are for shaders and SrcOver. |
| // Choosing SkRasterPipelineBlitter will also let us to hit its single-color memset path. |
| if (!paint.getShader() && paint.getBlendMode() != SkBlendMode::kSrcOver) { |
| return true; |
| } |
| |
| auto cs = device.colorSpace(); |
| // We check (indirectly via makeContext()) later on if the shader can handle the colorspace |
| // in legacy mode, so here we just focus on if a single color needs raster-pipeline. |
| if (cs && !paint.getShader()) { |
| if (!paint.getColor4f().fitsInBytes() || !cs->isSRGB()) { |
| return true; |
| } |
| } |
| |
| // Only kN32 and 565 are handled by legacy blitters now, 565 mostly just for Android. |
| return device.colorType() != kN32_SkColorType |
| && device.colorType() != kRGB_565_SkColorType; |
| #endif |
| } |
| |
| SkBlitter* SkBlitter::Choose(const SkPixmap& device, |
| const SkMatrix& matrix, |
| const SkPaint& origPaint, |
| SkArenaAlloc* alloc, |
| bool drawCoverage) { |
| SkASSERT(alloc); |
| |
| if (kUnknown_SkColorType == device.colorType()) { |
| return alloc->make<SkNullBlitter>(); |
| } |
| |
| // We may tweak the original paint as we go. |
| SkTCopyOnFirstWrite<SkPaint> paint(origPaint); |
| |
| // We have the most fast-paths for SrcOver, so see if we can act like SrcOver. |
| if (paint->getBlendMode() != SkBlendMode::kSrcOver) { |
| switch (SkInterpretXfermode(*paint, SkColorTypeIsAlwaysOpaque(device.colorType()))) { |
| case kSrcOver_SkXfermodeInterpretation: |
| paint.writable()->setBlendMode(SkBlendMode::kSrcOver); |
| break; |
| case kSkipDrawing_SkXfermodeInterpretation: |
| return alloc->make<SkNullBlitter>(); |
| default: |
| break; |
| } |
| } |
| |
| // A Clear blend mode will ignore the entire color pipeline, as if Src mode with 0x00000000. |
| if (paint->getBlendMode() == SkBlendMode::kClear) { |
| SkPaint* p = paint.writable(); |
| p->setShader(nullptr); |
| p->setColorFilter(nullptr); |
| p->setBlendMode(SkBlendMode::kSrc); |
| p->setColor(0x00000000); |
| } |
| |
| #ifndef SK_SUPPORT_LEGACY_COLORFILTER_NO_SHADER |
| if (paint->getColorFilter() && !paint->getShader()) { |
| // apply the filter to the paint's color, and then remove the filter |
| auto dstCS = device.colorSpace(); |
| SkPaint* p = paint.writable(); |
| p->setColor(p->getColorFilter()->filterColor4f(p->getColor4f(), sk_srgb_singleton(), dstCS), |
| dstCS); |
| p->setColorFilter(nullptr); |
| } |
| #endif |
| |
| if (drawCoverage) { |
| if (device.colorType() == kAlpha_8_SkColorType) { |
| SkASSERT(!paint->getShader()); |
| SkASSERT(paint->isSrcOver()); |
| return alloc->make<SkA8_Coverage_Blitter>(device, *paint); |
| } |
| return alloc->make<SkNullBlitter>(); |
| } |
| |
| if (paint->isDither() && !SkPaintPriv::ShouldDither(*paint, device.colorType())) { |
| paint.writable()->setDither(false); |
| } |
| |
| #if defined(SK_USE_SKVM_BLITTER) |
| if (auto blitter = SkCreateSkVMBlitter(device, *paint, matrix, alloc)) { |
| return blitter; |
| } |
| #endif |
| |
| // We'll end here for many interesting cases: color spaces, color filters, most color types. |
| if (UseRasterPipelineBlitter(device, *paint, matrix)) { |
| auto blitter = SkCreateRasterPipelineBlitter(device, *paint, matrix, alloc); |
| SkASSERT(blitter); |
| return blitter; |
| } |
| |
| // Everything but legacy kN32_SkColorType and kRGB_565_SkColorType should already be handled. |
| SkASSERT(device.colorType() == kN32_SkColorType || |
| device.colorType() == kRGB_565_SkColorType); |
| |
| // And we should either have a shader, be blending with SrcOver, or both. |
| SkASSERT(paint->getShader() || paint->getBlendMode() == SkBlendMode::kSrcOver); |
| |
| // Legacy blitters keep their shader state on a shader context. |
| SkShaderBase::Context* shaderContext = nullptr; |
| if (paint->getShader()) { |
| shaderContext = as_SB(paint->getShader())->makeContext( |
| {*paint, matrix, nullptr, device.colorType(), device.colorSpace()}, |
| alloc); |
| |
| // Creating the context isn't always possible... we'll just fall back to raster pipeline. |
| if (!shaderContext) { |
| auto blitter = SkCreateRasterPipelineBlitter(device, *paint, matrix, alloc); |
| SkASSERT(blitter); |
| return blitter; |
| } |
| } |
| |
| if (device.colorType() == kN32_SkColorType) { |
| if (shaderContext) { |
| return alloc->make<SkARGB32_Shader_Blitter>(device, *paint, shaderContext); |
| } else if (paint->getColor() == SK_ColorBLACK) { |
| return alloc->make<SkARGB32_Black_Blitter>(device, *paint); |
| } else if (paint->getAlpha() == 0xFF) { |
| return alloc->make<SkARGB32_Opaque_Blitter>(device, *paint); |
| } else { |
| return alloc->make<SkARGB32_Blitter>(device, *paint); |
| } |
| } else if (device.colorType() == kRGB_565_SkColorType) { |
| if (shaderContext && SkRGB565_Shader_Blitter::Supports(device, *paint)) { |
| return alloc->make<SkRGB565_Shader_Blitter>(device, *paint, shaderContext); |
| } else { |
| return SkCreateRasterPipelineBlitter(device, *paint, matrix, alloc); |
| } |
| } else { |
| SkASSERT(false); |
| return alloc->make<SkNullBlitter>(); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkShaderBlitter::SkShaderBlitter(const SkPixmap& device, const SkPaint& paint, |
| SkShaderBase::Context* shaderContext) |
| : INHERITED(device) |
| , fShader(paint.getShader()) |
| , fShaderContext(shaderContext) { |
| SkASSERT(fShader); |
| SkASSERT(fShaderContext); |
| |
| fShader->ref(); |
| fShaderFlags = fShaderContext->getFlags(); |
| fConstInY = SkToBool(fShaderFlags & SkShaderBase::kConstInY32_Flag); |
| } |
| |
| SkShaderBlitter::~SkShaderBlitter() { |
| fShader->unref(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #ifdef SK_DEBUG |
| |
| void SkRectClipCheckBlitter::blitH(int x, int y, int width) { |
| SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, width, 1))); |
| fBlitter->blitH(x, y, width); |
| } |
| |
| void SkRectClipCheckBlitter::blitAntiH(int x, int y, const SkAlpha aa[], const int16_t runs[]) { |
| const int16_t* iter = runs; |
| for (; *iter; iter += *iter) |
| ; |
| int width = iter - runs; |
| SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, width, 1))); |
| fBlitter->blitAntiH(x, y, aa, runs); |
| } |
| |
| void SkRectClipCheckBlitter::blitV(int x, int y, int height, SkAlpha alpha) { |
| SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, 1, height))); |
| fBlitter->blitV(x, y, height, alpha); |
| } |
| |
| void SkRectClipCheckBlitter::blitRect(int x, int y, int width, int height) { |
| SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, width, height))); |
| fBlitter->blitRect(x, y, width, height); |
| } |
| |
| void SkRectClipCheckBlitter::blitAntiRect(int x, int y, int width, int height, |
| SkAlpha leftAlpha, SkAlpha rightAlpha) { |
| bool skipLeft = !leftAlpha; |
| bool skipRight = !rightAlpha; |
| #ifdef SK_DEBUG |
| SkIRect r = SkIRect::MakeXYWH(x + skipLeft, y, width + 2 - skipRight - skipLeft, height); |
| SkASSERT(r.isEmpty() || fClipRect.contains(r)); |
| #endif |
| fBlitter->blitAntiRect(x, y, width, height, leftAlpha, rightAlpha); |
| } |
| |
| void SkRectClipCheckBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { |
| SkASSERT(mask.fBounds.contains(clip)); |
| SkASSERT(fClipRect.contains(clip)); |
| fBlitter->blitMask(mask, clip); |
| } |
| |
| const SkPixmap* SkRectClipCheckBlitter::justAnOpaqueColor(uint32_t* value) { |
| return fBlitter->justAnOpaqueColor(value); |
| } |
| |
| void SkRectClipCheckBlitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { |
| SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, 2, 1))); |
| fBlitter->blitAntiH2(x, y, a0, a1); |
| } |
| |
| void SkRectClipCheckBlitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { |
| SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, 1, 2))); |
| fBlitter->blitAntiV2(x, y, a0, a1); |
| } |
| |
| #endif |