| /* NEON optimized code (C) COPYRIGHT 2009 Motorola |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkBitmapProcState.h" |
| #include "SkPerspIter.h" |
| #include "SkShader.h" |
| #include "SkUtils.h" |
| #include "SkUtilsArm.h" |
| |
| // Helper to ensure that when we shift down, we do it w/o sign-extension |
| // so the caller doesn't have to manually mask off the top 16 bits |
| // |
| static unsigned SK_USHIFT16(unsigned x) { |
| return x >> 16; |
| } |
| |
| /* returns 0...(n-1) given any x (positive or negative). |
| |
| As an example, if n (which is always positive) is 5... |
| |
| x: -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 |
| returns: 2 3 4 0 1 2 3 4 0 1 2 3 4 0 1 2 3 |
| */ |
| 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; |
| } |
| |
| /* |
| * The decal_ functions require that |
| * 1. dx > 0 |
| * 2. [fx, fx+dx, fx+2dx, fx+3dx, ... fx+(count-1)dx] are all <= maxX |
| * |
| * In addition, we use SkFractionalInt to keep more fractional precision than |
| * just SkFixed, so we will abort the decal_ call if dx is very small, since |
| * the decal_ function just operates on SkFixed. If that were changed, we could |
| * skip the very_small test here. |
| */ |
| static inline bool can_truncate_to_fixed_for_decal(SkFractionalInt frX, |
| SkFractionalInt frDx, |
| int count, unsigned max) { |
| SkFixed dx = SkFractionalIntToFixed(frDx); |
| |
| // if decal_ kept SkFractionalInt precision, this would just be dx <= 0 |
| // I just made up the 1/256. Just don't want to perceive accumulated error |
| // if we truncate frDx and lose its low bits. |
| if (dx <= SK_Fixed1 / 256) { |
| return false; |
| } |
| |
| // We cast to unsigned so we don't have to check for negative values, which |
| // will now appear as very large positive values, and thus fail our test! |
| SkFixed fx = SkFractionalIntToFixed(frX); |
| return (unsigned)SkFixedFloorToInt(fx) <= max && |
| (unsigned)SkFixedFloorToInt(fx + dx * (count - 1)) < max; |
| } |
| |
| void decal_nofilter_scale(uint32_t dst[], SkFixed fx, SkFixed dx, int count); |
| void decal_filter_scale(uint32_t dst[], SkFixed fx, SkFixed dx, int count); |
| |
| // Compile neon code paths if needed |
| #if !SK_ARM_NEON_IS_NONE |
| |
| // These are defined in src/opts/SkBitmapProcState_matrixProcs_neon.cpp |
| extern const SkBitmapProcState::MatrixProc ClampX_ClampY_Procs_neon[]; |
| extern const SkBitmapProcState::MatrixProc RepeatX_RepeatY_Procs_neon[]; |
| |
| #endif // !SK_ARM_NEON_IS_NONE |
| |
| // Compile non-neon code path if needed |
| #if !SK_ARM_NEON_IS_ALWAYS |
| #define MAKENAME(suffix) ClampX_ClampY ## suffix |
| #define TILEX_PROCF(fx, max) SkClampMax((fx) >> 16, max) |
| #define TILEY_PROCF(fy, max) SkClampMax((fy) >> 16, max) |
| #define TILEX_LOW_BITS(fx, max) (((fx) >> 12) & 0xF) |
| #define TILEY_LOW_BITS(fy, max) (((fy) >> 12) & 0xF) |
| #define CHECK_FOR_DECAL |
| #include "SkBitmapProcState_matrix.h" |
| |
| #define MAKENAME(suffix) RepeatX_RepeatY ## suffix |
| #define TILEX_PROCF(fx, max) SK_USHIFT16(((fx) & 0xFFFF) * ((max) + 1)) |
| #define TILEY_PROCF(fy, max) SK_USHIFT16(((fy) & 0xFFFF) * ((max) + 1)) |
| #define TILEX_LOW_BITS(fx, max) ((((fx) & 0xFFFF) * ((max) + 1) >> 12) & 0xF) |
| #define TILEY_LOW_BITS(fy, max) ((((fy) & 0xFFFF) * ((max) + 1) >> 12) & 0xF) |
| #include "SkBitmapProcState_matrix.h" |
| #endif |
| |
| #define MAKENAME(suffix) GeneralXY ## suffix |
| #define PREAMBLE(state) SkBitmapProcState::FixedTileProc tileProcX = (state).fTileProcX; (void) tileProcX; \ |
| SkBitmapProcState::FixedTileProc tileProcY = (state).fTileProcY; (void) tileProcY; \ |
| SkBitmapProcState::FixedTileLowBitsProc tileLowBitsProcX = (state).fTileLowBitsProcX; (void) tileLowBitsProcX; \ |
| SkBitmapProcState::FixedTileLowBitsProc tileLowBitsProcY = (state).fTileLowBitsProcY; (void) tileLowBitsProcY |
| #define PREAMBLE_PARAM_X , SkBitmapProcState::FixedTileProc tileProcX, SkBitmapProcState::FixedTileLowBitsProc tileLowBitsProcX |
| #define PREAMBLE_PARAM_Y , SkBitmapProcState::FixedTileProc tileProcY, SkBitmapProcState::FixedTileLowBitsProc tileLowBitsProcY |
| #define PREAMBLE_ARG_X , tileProcX, tileLowBitsProcX |
| #define PREAMBLE_ARG_Y , tileProcY, tileLowBitsProcY |
| #define TILEX_PROCF(fx, max) SK_USHIFT16(tileProcX(fx) * ((max) + 1)) |
| #define TILEY_PROCF(fy, max) SK_USHIFT16(tileProcY(fy) * ((max) + 1)) |
| #define TILEX_LOW_BITS(fx, max) tileLowBitsProcX(fx, (max) + 1) |
| #define TILEY_LOW_BITS(fy, max) tileLowBitsProcY(fy, (max) + 1) |
| #include "SkBitmapProcState_matrix.h" |
| |
| static inline U16CPU fixed_clamp(SkFixed x) |
| { |
| #ifdef SK_CPU_HAS_CONDITIONAL_INSTR |
| if (x < 0) |
| x = 0; |
| if (x >> 16) |
| x = 0xFFFF; |
| #else |
| if (x >> 16) |
| { |
| #if 0 // is this faster? |
| x = (~x >> 31) & 0xFFFF; |
| #else |
| if (x < 0) |
| x = 0; |
| else |
| x = 0xFFFF; |
| #endif |
| } |
| #endif |
| return x; |
| } |
| |
| static inline U16CPU fixed_repeat(SkFixed x) |
| { |
| return x & 0xFFFF; |
| } |
| |
| // Visual Studio 2010 (MSC_VER=1600) optimizes bit-shift code incorrectly. |
| // See http://code.google.com/p/skia/issues/detail?id=472 |
| #if defined(_MSC_VER) && (_MSC_VER >= 1600) |
| #pragma optimize("", off) |
| #endif |
| |
| static inline U16CPU fixed_mirror(SkFixed x) |
| { |
| SkFixed s = x << 15 >> 31; |
| // s is FFFFFFFF if we're on an odd interval, or 0 if an even interval |
| return (x ^ s) & 0xFFFF; |
| } |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1600) |
| #pragma optimize("", on) |
| #endif |
| |
| static SkBitmapProcState::FixedTileProc choose_tile_proc(unsigned m) |
| { |
| if (SkShader::kClamp_TileMode == m) |
| return fixed_clamp; |
| if (SkShader::kRepeat_TileMode == m) |
| return fixed_repeat; |
| SkASSERT(SkShader::kMirror_TileMode == m); |
| return fixed_mirror; |
| } |
| |
| static inline U16CPU fixed_clamp_lowbits(SkFixed x, int) { |
| return (x >> 12) & 0xF; |
| } |
| |
| static inline U16CPU fixed_repeat_or_mirrow_lowbits(SkFixed x, int scale) { |
| return ((x * scale) >> 12) & 0xF; |
| } |
| |
| static SkBitmapProcState::FixedTileLowBitsProc choose_tile_lowbits_proc(unsigned m) { |
| if (SkShader::kClamp_TileMode == m) { |
| return fixed_clamp_lowbits; |
| } else { |
| SkASSERT(SkShader::kMirror_TileMode == m || |
| SkShader::kRepeat_TileMode == m); |
| // mirror and repeat have the same behavior for the low bits. |
| return fixed_repeat_or_mirrow_lowbits; |
| } |
| } |
| |
| static inline U16CPU int_clamp(int x, int n) { |
| #ifdef SK_CPU_HAS_CONDITIONAL_INSTR |
| if (x >= n) |
| x = n - 1; |
| if (x < 0) |
| x = 0; |
| #else |
| if ((unsigned)x >= (unsigned)n) { |
| if (x < 0) { |
| x = 0; |
| } else { |
| x = n - 1; |
| } |
| } |
| #endif |
| return x; |
| } |
| |
| static inline U16CPU int_repeat(int x, int n) { |
| return sk_int_mod(x, n); |
| } |
| |
| static inline U16CPU int_mirror(int x, int n) { |
| x = sk_int_mod(x, 2 * n); |
| if (x >= n) { |
| x = n + ~(x - n); |
| } |
| return x; |
| } |
| |
| #if 0 |
| static void test_int_tileprocs() { |
| for (int i = -8; i <= 8; i++) { |
| SkDebugf(" int_mirror(%2d, 3) = %d\n", i, int_mirror(i, 3)); |
| } |
| } |
| #endif |
| |
| static SkBitmapProcState::IntTileProc choose_int_tile_proc(unsigned tm) { |
| if (SkShader::kClamp_TileMode == tm) |
| return int_clamp; |
| if (SkShader::kRepeat_TileMode == tm) |
| return int_repeat; |
| SkASSERT(SkShader::kMirror_TileMode == tm); |
| return int_mirror; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| void decal_nofilter_scale(uint32_t dst[], SkFixed fx, SkFixed dx, int count) |
| { |
| int i; |
| |
| for (i = (count >> 2); i > 0; --i) |
| { |
| *dst++ = pack_two_shorts(fx >> 16, (fx + dx) >> 16); |
| fx += dx+dx; |
| *dst++ = pack_two_shorts(fx >> 16, (fx + dx) >> 16); |
| fx += dx+dx; |
| } |
| count &= 3; |
| |
| uint16_t* xx = (uint16_t*)dst; |
| for (i = count; i > 0; --i) { |
| *xx++ = SkToU16(fx >> 16); fx += dx; |
| } |
| } |
| |
| void decal_filter_scale(uint32_t dst[], SkFixed fx, SkFixed dx, int count) |
| { |
| |
| |
| if (count & 1) |
| { |
| SkASSERT((fx >> (16 + 14)) == 0); |
| *dst++ = (fx >> 12 << 14) | ((fx >> 16) + 1); |
| fx += dx; |
| } |
| while ((count -= 2) >= 0) |
| { |
| SkASSERT((fx >> (16 + 14)) == 0); |
| *dst++ = (fx >> 12 << 14) | ((fx >> 16) + 1); |
| fx += dx; |
| |
| *dst++ = (fx >> 12 << 14) | ((fx >> 16) + 1); |
| fx += dx; |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // stores the same as SCALE, but is cheaper to compute. Also since there is no |
| // scale, we don't need/have a FILTER version |
| |
| static void fill_sequential(uint16_t xptr[], int start, int count) { |
| #if 1 |
| if (reinterpret_cast<intptr_t>(xptr) & 0x2) { |
| *xptr++ = start++; |
| count -= 1; |
| } |
| if (count > 3) { |
| uint32_t* xxptr = reinterpret_cast<uint32_t*>(xptr); |
| uint32_t pattern0 = PACK_TWO_SHORTS(start + 0, start + 1); |
| uint32_t pattern1 = PACK_TWO_SHORTS(start + 2, start + 3); |
| start += count & ~3; |
| int qcount = count >> 2; |
| do { |
| *xxptr++ = pattern0; |
| pattern0 += 0x40004; |
| *xxptr++ = pattern1; |
| pattern1 += 0x40004; |
| } while (--qcount != 0); |
| xptr = reinterpret_cast<uint16_t*>(xxptr); |
| count &= 3; |
| } |
| while (--count >= 0) { |
| *xptr++ = start++; |
| } |
| #else |
| for (int i = 0; i < count; i++) { |
| *xptr++ = start++; |
| } |
| #endif |
| } |
| |
| static int nofilter_trans_preamble(const SkBitmapProcState& s, uint32_t** xy, |
| int x, int y) { |
| SkPoint pt; |
| s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf, |
| SkIntToScalar(y) + SK_ScalarHalf, &pt); |
| **xy = s.fIntTileProcY(SkScalarToFixed(pt.fY) >> 16, |
| s.fBitmap->height()); |
| *xy += 1; // bump the ptr |
| // return our starting X position |
| return SkScalarToFixed(pt.fX) >> 16; |
| } |
| |
| static void clampx_nofilter_trans(const SkBitmapProcState& s, |
| uint32_t xy[], int count, int x, int y) { |
| SkASSERT((s.fInvType & ~SkMatrix::kTranslate_Mask) == 0); |
| |
| int xpos = nofilter_trans_preamble(s, &xy, x, y); |
| const int width = s.fBitmap->width(); |
| if (1 == width) { |
| // all of the following X values must be 0 |
| memset(xy, 0, count * sizeof(uint16_t)); |
| return; |
| } |
| |
| uint16_t* xptr = reinterpret_cast<uint16_t*>(xy); |
| int n; |
| |
| // fill before 0 as needed |
| if (xpos < 0) { |
| n = -xpos; |
| if (n > count) { |
| n = count; |
| } |
| memset(xptr, 0, n * sizeof(uint16_t)); |
| count -= n; |
| if (0 == count) { |
| return; |
| } |
| xptr += n; |
| xpos = 0; |
| } |
| |
| // fill in 0..width-1 if needed |
| if (xpos < width) { |
| n = width - xpos; |
| if (n > count) { |
| n = count; |
| } |
| fill_sequential(xptr, xpos, n); |
| count -= n; |
| if (0 == count) { |
| return; |
| } |
| xptr += n; |
| } |
| |
| // fill the remaining with the max value |
| sk_memset16(xptr, width - 1, count); |
| } |
| |
| static void repeatx_nofilter_trans(const SkBitmapProcState& s, |
| uint32_t xy[], int count, int x, int y) { |
| SkASSERT((s.fInvType & ~SkMatrix::kTranslate_Mask) == 0); |
| |
| int xpos = nofilter_trans_preamble(s, &xy, x, y); |
| const int width = s.fBitmap->width(); |
| if (1 == width) { |
| // all of the following X values must be 0 |
| memset(xy, 0, count * sizeof(uint16_t)); |
| return; |
| } |
| |
| uint16_t* xptr = reinterpret_cast<uint16_t*>(xy); |
| int start = sk_int_mod(xpos, width); |
| int n = width - start; |
| if (n > count) { |
| n = count; |
| } |
| fill_sequential(xptr, start, n); |
| xptr += n; |
| count -= n; |
| |
| while (count >= width) { |
| fill_sequential(xptr, 0, width); |
| xptr += width; |
| count -= width; |
| } |
| |
| if (count > 0) { |
| fill_sequential(xptr, 0, count); |
| } |
| } |
| |
| static void fill_backwards(uint16_t xptr[], int pos, int count) { |
| for (int i = 0; i < count; i++) { |
| SkASSERT(pos >= 0); |
| xptr[i] = pos--; |
| } |
| } |
| |
| static void mirrorx_nofilter_trans(const SkBitmapProcState& s, |
| uint32_t xy[], int count, int x, int y) { |
| SkASSERT((s.fInvType & ~SkMatrix::kTranslate_Mask) == 0); |
| |
| int xpos = nofilter_trans_preamble(s, &xy, x, y); |
| const int width = s.fBitmap->width(); |
| if (1 == width) { |
| // all of the following X values must be 0 |
| memset(xy, 0, count * sizeof(uint16_t)); |
| return; |
| } |
| |
| uint16_t* xptr = reinterpret_cast<uint16_t*>(xy); |
| // need to know our start, and our initial phase (forward or backward) |
| bool forward; |
| int n; |
| int start = sk_int_mod(xpos, 2 * width); |
| if (start >= width) { |
| start = width + ~(start - width); |
| forward = false; |
| n = start + 1; // [start .. 0] |
| } else { |
| forward = true; |
| n = width - start; // [start .. width) |
| } |
| if (n > count) { |
| n = count; |
| } |
| if (forward) { |
| fill_sequential(xptr, start, n); |
| } else { |
| fill_backwards(xptr, start, n); |
| } |
| forward = !forward; |
| xptr += n; |
| count -= n; |
| |
| while (count >= width) { |
| if (forward) { |
| fill_sequential(xptr, 0, width); |
| } else { |
| fill_backwards(xptr, width - 1, width); |
| } |
| forward = !forward; |
| xptr += width; |
| count -= width; |
| } |
| |
| if (count > 0) { |
| if (forward) { |
| fill_sequential(xptr, 0, count); |
| } else { |
| fill_backwards(xptr, width - 1, count); |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkBitmapProcState::MatrixProc |
| SkBitmapProcState::chooseMatrixProc(bool trivial_matrix) { |
| // test_int_tileprocs(); |
| // check for our special case when there is no scale/affine/perspective |
| if (trivial_matrix) { |
| SkASSERT(!fDoFilter); |
| fIntTileProcY = choose_int_tile_proc(fTileModeY); |
| switch (fTileModeX) { |
| case SkShader::kClamp_TileMode: |
| return clampx_nofilter_trans; |
| case SkShader::kRepeat_TileMode: |
| return repeatx_nofilter_trans; |
| case SkShader::kMirror_TileMode: |
| return mirrorx_nofilter_trans; |
| } |
| } |
| |
| int index = 0; |
| if (fDoFilter) { |
| index = 1; |
| } |
| if (fInvType & SkMatrix::kPerspective_Mask) { |
| index += 4; |
| } else if (fInvType & SkMatrix::kAffine_Mask) { |
| index += 2; |
| } |
| |
| if (SkShader::kClamp_TileMode == fTileModeX && |
| SkShader::kClamp_TileMode == fTileModeY) |
| { |
| // clamp gets special version of filterOne |
| fFilterOneX = SK_Fixed1; |
| fFilterOneY = SK_Fixed1; |
| return SK_ARM_NEON_WRAP(ClampX_ClampY_Procs)[index]; |
| } |
| |
| // all remaining procs use this form for filterOne |
| fFilterOneX = SK_Fixed1 / fBitmap->width(); |
| fFilterOneY = SK_Fixed1 / fBitmap->height(); |
| |
| if (SkShader::kRepeat_TileMode == fTileModeX && |
| SkShader::kRepeat_TileMode == fTileModeY) |
| { |
| return SK_ARM_NEON_WRAP(RepeatX_RepeatY_Procs)[index]; |
| } |
| |
| fTileProcX = choose_tile_proc(fTileModeX); |
| fTileProcY = choose_tile_proc(fTileModeY); |
| fTileLowBitsProcX = choose_tile_lowbits_proc(fTileModeX); |
| fTileLowBitsProcY = choose_tile_lowbits_proc(fTileModeY); |
| return GeneralXY_Procs[index]; |
| } |
