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-rw-r--r--gfx/skia/skia/src/core/SkBitmapProcState.cpp694
1 files changed, 694 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/core/SkBitmapProcState.cpp b/gfx/skia/skia/src/core/SkBitmapProcState.cpp
new file mode 100644
index 0000000000..7f7dfd6db4
--- /dev/null
+++ b/gfx/skia/skia/src/core/SkBitmapProcState.cpp
@@ -0,0 +1,694 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "include/core/SkImageEncoder.h"
+#include "include/core/SkPaint.h"
+#include "include/core/SkShader.h"
+#include "include/private/SkColorData.h"
+#include "include/private/base/SkMacros.h"
+#include "include/private/base/SkTPin.h"
+#include "src/core/SkBitmapCache.h"
+#include "src/core/SkBitmapProcState.h"
+#include "src/core/SkMipmap.h"
+#include "src/core/SkMipmapAccessor.h"
+#include "src/core/SkOpts.h"
+#include "src/core/SkResourceCache.h"
+
+// One-stop-shop shader for,
+// - nearest-neighbor sampling (_nofilter_),
+// - clamp tiling in X and Y both (Clamp_),
+// - with at most a scale and translate matrix (_DX_),
+// - and no extra alpha applied (_opaque_),
+// - sampling from 8888 (_S32_) and drawing to 8888 (_S32_).
+static void Clamp_S32_opaque_D32_nofilter_DX_shaderproc(const void* sIn, int x, int y,
+ SkPMColor* dst, int count) {
+ const SkBitmapProcState& s = *static_cast<const SkBitmapProcState*>(sIn);
+ SkASSERT(s.fInvMatrix.isScaleTranslate());
+ SkASSERT(s.fAlphaScale == 256);
+
+ const unsigned maxX = s.fPixmap.width() - 1;
+ SkFractionalInt fx;
+ int dstY;
+ {
+ const SkBitmapProcStateAutoMapper mapper(s, x, y);
+ const unsigned maxY = s.fPixmap.height() - 1;
+ dstY = SkTPin<int>(mapper.intY(), 0, maxY);
+ fx = mapper.fractionalIntX();
+ }
+
+ const SkPMColor* src = s.fPixmap.addr32(0, dstY);
+ const SkFractionalInt dx = s.fInvSxFractionalInt;
+
+ // Check if we're safely inside [0...maxX] so no need to clamp each computed index.
+ //
+ if ((uint64_t)SkFractionalIntToInt(fx) <= maxX &&
+ (uint64_t)SkFractionalIntToInt(fx + dx * (count - 1)) <= maxX)
+ {
+ int count4 = count >> 2;
+ for (int i = 0; i < count4; ++i) {
+ SkPMColor src0 = src[SkFractionalIntToInt(fx)]; fx += dx;
+ SkPMColor src1 = src[SkFractionalIntToInt(fx)]; fx += dx;
+ SkPMColor src2 = src[SkFractionalIntToInt(fx)]; fx += dx;
+ SkPMColor src3 = src[SkFractionalIntToInt(fx)]; fx += dx;
+ dst[0] = src0;
+ dst[1] = src1;
+ dst[2] = src2;
+ dst[3] = src3;
+ dst += 4;
+ }
+ for (int i = (count4 << 2); i < count; ++i) {
+ unsigned index = SkFractionalIntToInt(fx);
+ SkASSERT(index <= maxX);
+ *dst++ = src[index];
+ fx += dx;
+ }
+ } else {
+ for (int i = 0; i < count; ++i) {
+ dst[i] = src[SkTPin<int>(SkFractionalIntToInt(fx), 0, maxX)];
+ fx += dx;
+ }
+ }
+}
+
+static void S32_alpha_D32_nofilter_DX(const SkBitmapProcState& s,
+ const uint32_t* xy, int count, SkPMColor* colors) {
+ SkASSERT(count > 0 && colors != nullptr);
+ SkASSERT(s.fInvMatrix.isScaleTranslate());
+ SkASSERT(!s.fBilerp);
+ SkASSERT(4 == s.fPixmap.info().bytesPerPixel());
+ SkASSERT(s.fAlphaScale <= 256);
+
+ // xy is a 32-bit y-coordinate, followed by 16-bit x-coordinates.
+ unsigned y = *xy++;
+ SkASSERT(y < (unsigned)s.fPixmap.height());
+
+ auto row = (const SkPMColor*)( (const char*)s.fPixmap.addr() + y * s.fPixmap.rowBytes() );
+
+ if (1 == s.fPixmap.width()) {
+ SkOpts::memset32(colors, SkAlphaMulQ(row[0], s.fAlphaScale), count);
+ return;
+ }
+
+ // Step 4 xs == 2 uint32_t at a time.
+ while (count >= 4) {
+ uint32_t x01 = *xy++,
+ x23 = *xy++;
+
+ SkPMColor p0 = row[UNPACK_PRIMARY_SHORT (x01)];
+ SkPMColor p1 = row[UNPACK_SECONDARY_SHORT(x01)];
+ SkPMColor p2 = row[UNPACK_PRIMARY_SHORT (x23)];
+ SkPMColor p3 = row[UNPACK_SECONDARY_SHORT(x23)];
+
+ *colors++ = SkAlphaMulQ(p0, s.fAlphaScale);
+ *colors++ = SkAlphaMulQ(p1, s.fAlphaScale);
+ *colors++ = SkAlphaMulQ(p2, s.fAlphaScale);
+ *colors++ = SkAlphaMulQ(p3, s.fAlphaScale);
+
+ count -= 4;
+ }
+
+ // Step 1 x == 1 uint16_t at a time.
+ auto x = (const uint16_t*)xy;
+ while (count --> 0) {
+ *colors++ = SkAlphaMulQ(row[*x++], s.fAlphaScale);
+ }
+}
+
+static void S32_alpha_D32_nofilter_DXDY(const SkBitmapProcState& s,
+ const uint32_t* xy, int count, SkPMColor* colors) {
+ SkASSERT(count > 0 && colors != nullptr);
+ SkASSERT(!s.fBilerp);
+ SkASSERT(4 == s.fPixmap.info().bytesPerPixel());
+ SkASSERT(s.fAlphaScale <= 256);
+
+ auto src = (const char*)s.fPixmap.addr();
+ size_t rb = s.fPixmap.rowBytes();
+
+ while (count --> 0) {
+ uint32_t XY = *xy++,
+ x = XY & 0xffff,
+ y = XY >> 16;
+ SkASSERT(x < (unsigned)s.fPixmap.width ());
+ SkASSERT(y < (unsigned)s.fPixmap.height());
+ *colors++ = ((const SkPMColor*)(src + y*rb))[x];
+ }
+}
+
+SkBitmapProcState::SkBitmapProcState(const SkImage_Base* image, SkTileMode tmx, SkTileMode tmy)
+ : fImage(image)
+ , fTileModeX(tmx)
+ , fTileModeY(tmy)
+{}
+
+// true iff the matrix has a scale and no more than an optional translate.
+static bool matrix_only_scale_translate(const SkMatrix& m) {
+ return (m.getType() & ~SkMatrix::kTranslate_Mask) == SkMatrix::kScale_Mask;
+}
+
+/**
+ * For the purposes of drawing bitmaps, if a matrix is "almost" translate
+ * go ahead and treat it as if it were, so that subsequent code can go fast.
+ */
+static bool just_trans_general(const SkMatrix& matrix) {
+ SkASSERT(matrix_only_scale_translate(matrix));
+
+ const SkScalar tol = SK_Scalar1 / 32768;
+
+ return SkScalarNearlyZero(matrix[SkMatrix::kMScaleX] - SK_Scalar1, tol)
+ && SkScalarNearlyZero(matrix[SkMatrix::kMScaleY] - SK_Scalar1, tol);
+}
+
+/**
+ * Determine if the matrix can be treated as integral-only-translate,
+ * for the purpose of filtering.
+ */
+static bool just_trans_integral(const SkMatrix& m) {
+ static constexpr SkScalar tol = SK_Scalar1 / 256;
+
+ return m.getType() <= SkMatrix::kTranslate_Mask
+ && SkScalarNearlyEqual(m.getTranslateX(), SkScalarRoundToScalar(m.getTranslateX()), tol)
+ && SkScalarNearlyEqual(m.getTranslateY(), SkScalarRoundToScalar(m.getTranslateY()), tol);
+}
+
+static bool valid_for_filtering(unsigned dimension) {
+ // for filtering, width and height must fit in 14bits, since we use steal
+ // 2 bits from each to store our 4bit subpixel data
+ return (dimension & ~0x3FFF) == 0;
+}
+
+bool SkBitmapProcState::init(const SkMatrix& inv, SkAlpha paintAlpha,
+ const SkSamplingOptions& sampling) {
+ SkASSERT(!inv.hasPerspective());
+ SkASSERT(SkOpts::S32_alpha_D32_filter_DXDY || inv.isScaleTranslate());
+ SkASSERT(!sampling.isAniso());
+ SkASSERT(!sampling.useCubic);
+ SkASSERT(sampling.mipmap != SkMipmapMode::kLinear);
+
+ fPixmap.reset();
+ fBilerp = false;
+
+ auto* access = SkMipmapAccessor::Make(&fAlloc, (const SkImage*)fImage, inv, sampling.mipmap);
+ if (!access) {
+ return false;
+ }
+ std::tie(fPixmap, fInvMatrix) = access->level();
+ fInvMatrix.preConcat(inv);
+
+ fPaintAlpha = paintAlpha;
+ fBilerp = sampling.filter == SkFilterMode::kLinear;
+ SkASSERT(fPixmap.addr());
+
+ bool integral_translate_only = just_trans_integral(fInvMatrix);
+ if (!integral_translate_only) {
+ // Most of the scanline procs deal with "unit" texture coordinates, as this
+ // makes it easy to perform tiling modes (repeat = (x & 0xFFFF)). To generate
+ // those, we divide the matrix by its dimensions here.
+ //
+ // We don't do this if we're either trivial (can ignore the matrix) or clamping
+ // in both X and Y since clamping to width,height is just as easy as to 0xFFFF.
+
+ if (fTileModeX != SkTileMode::kClamp || fTileModeY != SkTileMode::kClamp) {
+ SkMatrixPriv::PostIDiv(&fInvMatrix, fPixmap.width(), fPixmap.height());
+ }
+
+ // Now that all possible changes to the matrix have taken place, check
+ // to see if we're really close to a no-scale matrix. If so, explicitly
+ // set it to be so. Subsequent code may inspect this matrix to choose
+ // a faster path in this case.
+
+ // This code will only execute if the matrix has some scale component;
+ // if it's already pure translate then we won't do this inversion.
+
+ if (matrix_only_scale_translate(fInvMatrix)) {
+ SkMatrix forward;
+ if (fInvMatrix.invert(&forward) && just_trans_general(forward)) {
+ fInvMatrix.setTranslate(-forward.getTranslateX(), -forward.getTranslateY());
+ }
+ }
+
+ // Recompute the flag after matrix adjustments.
+ integral_translate_only = just_trans_integral(fInvMatrix);
+ }
+
+ if (fBilerp &&
+ (!valid_for_filtering(fPixmap.width() | fPixmap.height()) || integral_translate_only)) {
+ fBilerp = false;
+ }
+
+ return true;
+}
+
+/*
+ * Analyze filter-quality and matrix, and decide how to implement that.
+ *
+ * In general, we cascade down the request level [ High ... None ]
+ * - for a given level, if we can fulfill it, fine, else
+ * - else we downgrade to the next lower level and try again.
+ * We can always fulfill requests for Low and None
+ * - sometimes we will "ignore" Low and give None, but this is likely a legacy perf hack
+ * and may be removed.
+ */
+bool SkBitmapProcState::chooseProcs() {
+ SkASSERT(!fInvMatrix.hasPerspective());
+ SkASSERT(SkOpts::S32_alpha_D32_filter_DXDY || fInvMatrix.isScaleTranslate());
+ SkASSERT(fPixmap.colorType() == kN32_SkColorType);
+ SkASSERT(fPixmap.alphaType() == kPremul_SkAlphaType ||
+ fPixmap.alphaType() == kOpaque_SkAlphaType);
+
+ SkASSERT(fTileModeX != SkTileMode::kDecal);
+
+ fInvProc = SkMatrixPriv::GetMapXYProc(fInvMatrix);
+ fInvSxFractionalInt = SkScalarToFractionalInt(fInvMatrix.getScaleX());
+ fInvKyFractionalInt = SkScalarToFractionalInt(fInvMatrix.getSkewY ());
+
+ fAlphaScale = SkAlpha255To256(fPaintAlpha);
+
+ bool translate_only = (fInvMatrix.getType() & ~SkMatrix::kTranslate_Mask) == 0;
+ fMatrixProc = this->chooseMatrixProc(translate_only);
+ SkASSERT(fMatrixProc);
+
+ if (fInvMatrix.isScaleTranslate()) {
+ fSampleProc32 = fBilerp ? SkOpts::S32_alpha_D32_filter_DX : S32_alpha_D32_nofilter_DX ;
+ } else {
+ fSampleProc32 = fBilerp ? SkOpts::S32_alpha_D32_filter_DXDY : S32_alpha_D32_nofilter_DXDY;
+ }
+ SkASSERT(fSampleProc32);
+
+ fShaderProc32 = this->chooseShaderProc32();
+
+ // our special-case shaderprocs
+ // TODO: move this one into chooseShaderProc32() or pull all that in here.
+ if (nullptr == fShaderProc32
+ && fAlphaScale == 256
+ && !fBilerp
+ && SkTileMode::kClamp == fTileModeX
+ && SkTileMode::kClamp == fTileModeY
+ && fInvMatrix.isScaleTranslate()) {
+ fShaderProc32 = Clamp_S32_opaque_D32_nofilter_DX_shaderproc;
+ }
+
+ return true;
+}
+
+static void Clamp_S32_D32_nofilter_trans_shaderproc(const void* sIn,
+ int x, int y,
+ SkPMColor* colors,
+ int count) {
+ const SkBitmapProcState& s = *static_cast<const SkBitmapProcState*>(sIn);
+ SkASSERT(s.fInvMatrix.isTranslate());
+ SkASSERT(count > 0 && colors != nullptr);
+ SkASSERT(!s.fBilerp);
+
+ const int maxX = s.fPixmap.width() - 1;
+ const int maxY = s.fPixmap.height() - 1;
+ int ix = s.fFilterOneX + x;
+ int iy = SkTPin(s.fFilterOneY + y, 0, maxY);
+ const SkPMColor* row = s.fPixmap.addr32(0, iy);
+
+ // clamp to the left
+ if (ix < 0) {
+ int n = std::min(-ix, count);
+ SkOpts::memset32(colors, row[0], n);
+ count -= n;
+ if (0 == count) {
+ return;
+ }
+ colors += n;
+ SkASSERT(-ix == n);
+ ix = 0;
+ }
+ // copy the middle
+ if (ix <= maxX) {
+ int n = std::min(maxX - ix + 1, count);
+ memcpy(colors, row + ix, n * sizeof(SkPMColor));
+ count -= n;
+ if (0 == count) {
+ return;
+ }
+ colors += n;
+ }
+ SkASSERT(count > 0);
+ // clamp to the right
+ SkOpts::memset32(colors, row[maxX], count);
+}
+
+static inline int sk_int_mod(int x, int n) {
+ SkASSERT(n > 0);
+ if ((unsigned)x >= (unsigned)n) {
+ if (x < 0) {
+ x = n + ~(~x % n);
+ } else {
+ x = x % n;
+ }
+ }
+ return x;
+}
+
+static inline int sk_int_mirror(int x, int n) {
+ x = sk_int_mod(x, 2 * n);
+ if (x >= n) {
+ x = n + ~(x - n);
+ }
+ return x;
+}
+
+static void Repeat_S32_D32_nofilter_trans_shaderproc(const void* sIn,
+ int x, int y,
+ SkPMColor* colors,
+ int count) {
+ const SkBitmapProcState& s = *static_cast<const SkBitmapProcState*>(sIn);
+ SkASSERT(s.fInvMatrix.isTranslate());
+ SkASSERT(count > 0 && colors != nullptr);
+ SkASSERT(!s.fBilerp);
+
+ const int stopX = s.fPixmap.width();
+ const int stopY = s.fPixmap.height();
+ int ix = s.fFilterOneX + x;
+ int iy = sk_int_mod(s.fFilterOneY + y, stopY);
+ const SkPMColor* row = s.fPixmap.addr32(0, iy);
+
+ ix = sk_int_mod(ix, stopX);
+ for (;;) {
+ int n = std::min(stopX - ix, count);
+ memcpy(colors, row + ix, n * sizeof(SkPMColor));
+ count -= n;
+ if (0 == count) {
+ return;
+ }
+ colors += n;
+ ix = 0;
+ }
+}
+
+static inline void filter_32_alpha(unsigned t,
+ SkPMColor color0,
+ SkPMColor color1,
+ SkPMColor* dstColor,
+ unsigned alphaScale) {
+ SkASSERT((unsigned)t <= 0xF);
+ SkASSERT(alphaScale <= 256);
+
+ const uint32_t mask = 0xFF00FF;
+
+ int scale = 256 - 16*t;
+ uint32_t lo = (color0 & mask) * scale;
+ uint32_t hi = ((color0 >> 8) & mask) * scale;
+
+ scale = 16*t;
+ lo += (color1 & mask) * scale;
+ hi += ((color1 >> 8) & mask) * scale;
+
+ // TODO: if (alphaScale < 256) ...
+ lo = ((lo >> 8) & mask) * alphaScale;
+ hi = ((hi >> 8) & mask) * alphaScale;
+
+ *dstColor = ((lo >> 8) & mask) | (hi & ~mask);
+}
+
+static void S32_D32_constX_shaderproc(const void* sIn,
+ int x, int y,
+ SkPMColor* colors,
+ int count) {
+ const SkBitmapProcState& s = *static_cast<const SkBitmapProcState*>(sIn);
+ SkASSERT(s.fInvMatrix.isScaleTranslate());
+ SkASSERT(count > 0 && colors != nullptr);
+ SkASSERT(1 == s.fPixmap.width());
+
+ int iY0;
+ int iY1 SK_INIT_TO_AVOID_WARNING;
+ int iSubY SK_INIT_TO_AVOID_WARNING;
+
+ if (s.fBilerp) {
+ SkBitmapProcState::MatrixProc mproc = s.getMatrixProc();
+ uint32_t xy[2];
+
+ mproc(s, xy, 1, x, y);
+
+ iY0 = xy[0] >> 18;
+ iY1 = xy[0] & 0x3FFF;
+ iSubY = (xy[0] >> 14) & 0xF;
+ } else {
+ int yTemp;
+
+ if (s.fInvMatrix.isTranslate()) {
+ yTemp = s.fFilterOneY + y;
+ } else{
+ const SkBitmapProcStateAutoMapper mapper(s, x, y);
+
+ // When the matrix has a scale component the setup code in
+ // chooseProcs multiples the inverse matrix by the inverse of the
+ // bitmap's width and height. Since this method is going to do
+ // its own tiling and sampling we need to undo that here.
+ if (SkTileMode::kClamp != s.fTileModeX || SkTileMode::kClamp != s.fTileModeY) {
+ yTemp = SkFractionalIntToInt(mapper.fractionalIntY() * s.fPixmap.height());
+ } else {
+ yTemp = mapper.intY();
+ }
+ }
+
+ const int stopY = s.fPixmap.height();
+ switch (s.fTileModeY) {
+ case SkTileMode::kClamp:
+ iY0 = SkTPin(yTemp, 0, stopY-1);
+ break;
+ case SkTileMode::kRepeat:
+ iY0 = sk_int_mod(yTemp, stopY);
+ break;
+ case SkTileMode::kMirror:
+ default:
+ iY0 = sk_int_mirror(yTemp, stopY);
+ break;
+ }
+
+#ifdef SK_DEBUG
+ {
+ const SkBitmapProcStateAutoMapper mapper(s, x, y);
+ int iY2;
+
+ if (!s.fInvMatrix.isTranslate() &&
+ (SkTileMode::kClamp != s.fTileModeX || SkTileMode::kClamp != s.fTileModeY)) {
+ iY2 = SkFractionalIntToInt(mapper.fractionalIntY() * s.fPixmap.height());
+ } else {
+ iY2 = mapper.intY();
+ }
+
+ switch (s.fTileModeY) {
+ case SkTileMode::kClamp:
+ iY2 = SkTPin(iY2, 0, stopY-1);
+ break;
+ case SkTileMode::kRepeat:
+ iY2 = sk_int_mod(iY2, stopY);
+ break;
+ case SkTileMode::kMirror:
+ default:
+ iY2 = sk_int_mirror(iY2, stopY);
+ break;
+ }
+
+ SkASSERT(iY0 == iY2);
+ }
+#endif
+ }
+
+ const SkPMColor* row0 = s.fPixmap.addr32(0, iY0);
+ SkPMColor color;
+
+ if (s.fBilerp) {
+ const SkPMColor* row1 = s.fPixmap.addr32(0, iY1);
+ filter_32_alpha(iSubY, *row0, *row1, &color, s.fAlphaScale);
+ } else {
+ if (s.fAlphaScale < 256) {
+ color = SkAlphaMulQ(*row0, s.fAlphaScale);
+ } else {
+ color = *row0;
+ }
+ }
+
+ SkOpts::memset32(colors, color, count);
+}
+
+static void DoNothing_shaderproc(const void*, int x, int y,
+ SkPMColor* colors, int count) {
+ // if we get called, the matrix is too tricky, so we just draw nothing
+ SkOpts::memset32(colors, 0, count);
+}
+
+bool SkBitmapProcState::setupForTranslate() {
+ SkPoint pt;
+ const SkBitmapProcStateAutoMapper mapper(*this, 0, 0, &pt);
+
+ /*
+ * if the translate is larger than our ints, we can get random results, or
+ * worse, we might get 0x80000000, which wreaks havoc on us, since we can't
+ * negate it.
+ */
+ const SkScalar too_big = SkIntToScalar(1 << 30);
+ if (SkScalarAbs(pt.fX) > too_big || SkScalarAbs(pt.fY) > too_big) {
+ return false;
+ }
+
+ // Since we know we're not filtered, we re-purpose these fields allow
+ // us to go from device -> src coordinates w/ just an integer add,
+ // rather than running through the inverse-matrix
+ fFilterOneX = mapper.intX();
+ fFilterOneY = mapper.intY();
+
+ return true;
+}
+
+SkBitmapProcState::ShaderProc32 SkBitmapProcState::chooseShaderProc32() {
+
+ if (kN32_SkColorType != fPixmap.colorType()) {
+ return nullptr;
+ }
+
+ if (1 == fPixmap.width() && fInvMatrix.isScaleTranslate()) {
+ if (!fBilerp && fInvMatrix.isTranslate() && !this->setupForTranslate()) {
+ return DoNothing_shaderproc;
+ }
+ return S32_D32_constX_shaderproc;
+ }
+
+ if (fAlphaScale < 256) {
+ return nullptr;
+ }
+ if (!fInvMatrix.isTranslate()) {
+ return nullptr;
+ }
+ if (fBilerp) {
+ return nullptr;
+ }
+
+ SkTileMode tx = fTileModeX;
+ SkTileMode ty = fTileModeY;
+
+ if (SkTileMode::kClamp == tx && SkTileMode::kClamp == ty) {
+ if (this->setupForTranslate()) {
+ return Clamp_S32_D32_nofilter_trans_shaderproc;
+ }
+ return DoNothing_shaderproc;
+ }
+ if (SkTileMode::kRepeat == tx && SkTileMode::kRepeat == ty) {
+ if (this->setupForTranslate()) {
+ return Repeat_S32_D32_nofilter_trans_shaderproc;
+ }
+ return DoNothing_shaderproc;
+ }
+ return nullptr;
+}
+
+#ifdef SK_DEBUG
+
+static void check_scale_nofilter(uint32_t bitmapXY[], int count,
+ unsigned mx, unsigned my) {
+ unsigned y = *bitmapXY++;
+ SkASSERT(y < my);
+
+ const uint16_t* xptr = reinterpret_cast<const uint16_t*>(bitmapXY);
+ for (int i = 0; i < count; ++i) {
+ SkASSERT(xptr[i] < mx);
+ }
+}
+
+static void check_scale_filter(uint32_t bitmapXY[], int count,
+ unsigned mx, unsigned my) {
+ uint32_t YY = *bitmapXY++;
+ unsigned y0 = YY >> 18;
+ unsigned y1 = YY & 0x3FFF;
+ SkASSERT(y0 < my);
+ SkASSERT(y1 < my);
+
+ for (int i = 0; i < count; ++i) {
+ uint32_t XX = bitmapXY[i];
+ unsigned x0 = XX >> 18;
+ unsigned x1 = XX & 0x3FFF;
+ SkASSERT(x0 < mx);
+ SkASSERT(x1 < mx);
+ }
+}
+
+static void check_affine_nofilter(uint32_t bitmapXY[], int count, unsigned mx, unsigned my) {
+ for (int i = 0; i < count; ++i) {
+ uint32_t XY = bitmapXY[i];
+ unsigned x = XY & 0xFFFF;
+ unsigned y = XY >> 16;
+ SkASSERT(x < mx);
+ SkASSERT(y < my);
+ }
+}
+
+static void check_affine_filter(uint32_t bitmapXY[], int count, unsigned mx, unsigned my) {
+ for (int i = 0; i < count; ++i) {
+ uint32_t YY = *bitmapXY++;
+ unsigned y0 = YY >> 18;
+ unsigned y1 = YY & 0x3FFF;
+ SkASSERT(y0 < my);
+ SkASSERT(y1 < my);
+
+ uint32_t XX = *bitmapXY++;
+ unsigned x0 = XX >> 18;
+ unsigned x1 = XX & 0x3FFF;
+ SkASSERT(x0 < mx);
+ SkASSERT(x1 < mx);
+ }
+}
+
+void SkBitmapProcState::DebugMatrixProc(const SkBitmapProcState& state,
+ uint32_t bitmapXY[], int count,
+ int x, int y) {
+ SkASSERT(bitmapXY);
+ SkASSERT(count > 0);
+
+ state.fMatrixProc(state, bitmapXY, count, x, y);
+
+ void (*proc)(uint32_t bitmapXY[], int count, unsigned mx, unsigned my);
+
+ if (state.fInvMatrix.isScaleTranslate()) {
+ proc = state.fBilerp ? check_scale_filter : check_scale_nofilter;
+ } else {
+ proc = state.fBilerp ? check_affine_filter : check_affine_nofilter;
+ }
+
+ proc(bitmapXY, count, state.fPixmap.width(), state.fPixmap.height());
+}
+
+SkBitmapProcState::MatrixProc SkBitmapProcState::getMatrixProc() const {
+ return DebugMatrixProc;
+}
+
+#endif
+
+/*
+ The storage requirements for the different matrix procs are as follows,
+ where each X or Y is 2 bytes, and N is the number of pixels/elements:
+
+ scale/translate nofilter Y(4bytes) + N * X
+ affine/perspective nofilter N * (X Y)
+ scale/translate filter Y Y + N * (X X)
+ affine filter N * (Y Y X X)
+ */
+int SkBitmapProcState::maxCountForBufferSize(size_t bufferSize) const {
+ int32_t size = static_cast<int32_t>(bufferSize);
+
+ size &= ~3; // only care about 4-byte aligned chunks
+ if (fInvMatrix.isScaleTranslate()) {
+ size -= 4; // the shared Y (or YY) coordinate
+ if (size < 0) {
+ size = 0;
+ }
+ size >>= 1;
+ } else {
+ size >>= 2;
+ }
+
+ if (fBilerp) {
+ size >>= 1;
+ }
+
+ return size;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-09 06:16:31 +0000