/*
* Copyright 2012 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 <emmintrin.h>
#include "SkBitmapProcState_opts_SSE2.h"
#include "SkBlitRow_opts_SSE2.h"
#include "SkColorData.h"
#include "SkColor_opts_SSE2.h"
#include "SkDither.h"
#include "SkMSAN.h"
#include "SkUtils.h"
/* SSE2 version of S32_Blend_BlitRow32()
* portable version is in core/SkBlitRow_D32.cpp
*/
void S32_Blend_BlitRow32_SSE2(SkPMColor* SK_RESTRICT dst,
const SkPMColor* SK_RESTRICT src,
int count, U8CPU alpha) {
SkASSERT(alpha <= 255);
if (count <= 0) {
return;
}
uint32_t src_scale = SkAlpha255To256(alpha);
if (count >= 4) {
SkASSERT(((size_t)dst & 0x03) == 0);
while (((size_t)dst & 0x0F) != 0) {
*dst = SkPMLerp(*src, *dst, src_scale);
src++;
dst++;
count--;
}
const __m128i *s = reinterpret_cast<const __m128i*>(src);
__m128i *d = reinterpret_cast<__m128i*>(dst);
while (count >= 4) {
// Load 4 pixels each of src and dest.
__m128i src_pixel = _mm_loadu_si128(s);
__m128i dst_pixel = _mm_load_si128(d);
__m128i result = SkPMLerp_SSE2(src_pixel, dst_pixel, src_scale);
_mm_store_si128(d, result);
s++;
d++;
count -= 4;
}
src = reinterpret_cast<const SkPMColor*>(s);
dst = reinterpret_cast<SkPMColor*>(d);
}
while (count > 0) {
*dst = SkPMLerp(*src, *dst, src_scale);
src++;
dst++;
count--;
}
}
void S32A_Blend_BlitRow32_SSE2(SkPMColor* SK_RESTRICT dst,
const SkPMColor* SK_RESTRICT src,
int count, U8CPU alpha) {
SkASSERT(alpha <= 255);
if (count <= 0) {
return;
}
if (count >= 4) {
while (((size_t)dst & 0x0F) != 0) {
*dst = SkBlendARGB32(*src, *dst, alpha);
src++;
dst++;
count--;
}
const __m128i *s = reinterpret_cast<const __m128i*>(src);
__m128i *d = reinterpret_cast<__m128i*>(dst);
while (count >= 4) {
// Load 4 pixels each of src and dest.
__m128i src_pixel = _mm_loadu_si128(s);
__m128i dst_pixel = _mm_load_si128(d);
__m128i result = SkBlendARGB32_SSE2(src_pixel, dst_pixel, alpha);
_mm_store_si128(d, result);
s++;
d++;
count -= 4;
}
src = reinterpret_cast<const SkPMColor*>(s);
dst = reinterpret_cast<SkPMColor*>(d);
}
while (count > 0) {
*dst = SkBlendARGB32(*src, *dst, alpha);
src++;
dst++;
count--;
}
}
// The following (left) shifts cause the top 5 bits of the mask components to
// line up with the corresponding components in an SkPMColor.
// Note that the mask's RGB16 order may differ from the SkPMColor order.
#define SK_R16x5_R32x5_SHIFT (SK_R32_SHIFT - SK_R16_SHIFT - SK_R16_BITS + 5)
#define SK_G16x5_G32x5_SHIFT (SK_G32_SHIFT - SK_G16_SHIFT - SK_G16_BITS + 5)
#define SK_B16x5_B32x5_SHIFT (SK_B32_SHIFT - SK_B16_SHIFT - SK_B16_BITS + 5)
#if SK_R16x5_R32x5_SHIFT == 0
#define SkPackedR16x5ToUnmaskedR32x5_SSE2(x) (x)
#elif SK_R16x5_R32x5_SHIFT > 0
#define SkPackedR16x5ToUnmaskedR32x5_SSE2(x) (_mm_slli_epi32(x, SK_R16x5_R32x5_SHIFT))
#else
#define SkPackedR16x5ToUnmaskedR32x5_SSE2(x) (_mm_srli_epi32(x, -SK_R16x5_R32x5_SHIFT))
#endif
#if SK_G16x5_G32x5_SHIFT == 0
#define SkPackedG16x5ToUnmaskedG32x5_SSE2(x) (x)
#elif SK_G16x5_G32x5_SHIFT > 0
#define SkPackedG16x5ToUnmaskedG32x5_SSE2(x) (_mm_slli_epi32(x, SK_G16x5_G32x5_SHIFT))
#else
#define SkPackedG16x5ToUnmaskedG32x5_SSE2(x) (_mm_srli_epi32(x, -SK_G16x5_G32x5_SHIFT))
#endif
#if SK_B16x5_B32x5_SHIFT == 0
#define SkPackedB16x5ToUnmaskedB32x5_SSE2(x) (x)
#elif SK_B16x5_B32x5_SHIFT > 0
#define SkPackedB16x5ToUnmaskedB32x5_SSE2(x) (_mm_slli_epi32(x, SK_B16x5_B32x5_SHIFT))
#else
#define SkPackedB16x5ToUnmaskedB32x5_SSE2(x) (_mm_srli_epi32(x, -SK_B16x5_B32x5_SHIFT))
#endif
static __m128i SkBlendLCD16_SSE2(__m128i &src, __m128i &dst,
__m128i &mask, __m128i &srcA) {
// In the following comments, the components of src, dst and mask are
// abbreviated as (s)rc, (d)st, and (m)ask. Color components are marked
// by an R, G, B, or A suffix. Components of one of the four pixels that
// are processed in parallel are marked with 0, 1, 2, and 3. "d1B", for
// example is the blue channel of the second destination pixel. Memory
// layout is shown for an ARGB byte order in a color value.
// src and srcA store 8-bit values interleaved with zeros.
// src = (0xFF, 0, sR, 0, sG, 0, sB, 0, 0xFF, 0, sR, 0, sG, 0, sB, 0)
// srcA = (srcA, 0, srcA, 0, srcA, 0, srcA, 0,
// srcA, 0, srcA, 0, srcA, 0, srcA, 0)
// mask stores 16-bit values (compressed three channels) interleaved with zeros.
// Lo and Hi denote the low and high bytes of a 16-bit value, respectively.
// mask = (m0RGBLo, m0RGBHi, 0, 0, m1RGBLo, m1RGBHi, 0, 0,
// m2RGBLo, m2RGBHi, 0, 0, m3RGBLo, m3RGBHi, 0, 0)
// Get the R,G,B of each 16bit mask pixel, we want all of them in 5 bits.
// r = (0, m0R, 0, 0, 0, m1R, 0, 0, 0, m2R, 0, 0, 0, m3R, 0, 0)
__m128i r = _mm_and_si128(SkPackedR16x5ToUnmaskedR32x5_SSE2(mask),
_mm_set1_epi32(0x1F << SK_R32_SHIFT));
// g = (0, 0, m0G, 0, 0, 0, m1G, 0, 0, 0, m2G, 0, 0, 0, m3G, 0)
__m128i g = _mm_and_si128(SkPackedG16x5ToUnmaskedG32x5_SSE2(mask),
_mm_set1_epi32(0x1F << SK_G32_SHIFT));
// b = (0, 0, 0, m0B, 0, 0, 0, m1B, 0, 0, 0, m2B, 0, 0, 0, m3B)
__m128i b = _mm_and_si128(SkPackedB16x5ToUnmaskedB32x5_SSE2(mask),
_mm_set1_epi32(0x1F << SK_B32_SHIFT));
// Pack the 4 16bit mask pixels into 4 32bit pixels, (p0, p1, p2, p3)
// Each component (m0R, m0G, etc.) is then a 5-bit value aligned to an
// 8-bit position
// mask = (0, m0R, m0G, m0B, 0, m1R, m1G, m1B,
// 0, m2R, m2G, m2B, 0, m3R, m3G, m3B)
mask = _mm_or_si128(_mm_or_si128(r, g), b);
// Interleave R,G,B into the lower byte of word.
// i.e. split the sixteen 8-bit values from mask into two sets of eight
// 16-bit values, padded by zero.
__m128i maskLo, maskHi;
// maskLo = (0, 0, m0R, 0, m0G, 0, m0B, 0, 0, 0, m1R, 0, m1G, 0, m1B, 0)
maskLo = _mm_unpacklo_epi8(mask, _mm_setzero_si128());
// maskHi = (0, 0, m2R, 0, m2G, 0, m2B, 0, 0, 0, m3R, 0, m3G, 0, m3B, 0)
maskHi = _mm_unpackhi_epi8(mask, _mm_setzero_si128());
// Upscale from 0..31 to 0..32
// (allows to replace division by left-shift further down)
// Left-shift each component by 4 and add the result back to that component,
// mapping numbers in the range 0..15 to 0..15, and 16..31 to 17..32
maskLo = _mm_add_epi16(maskLo, _mm_srli_epi16(maskLo, 4));
maskHi = _mm_add_epi16(maskHi, _mm_srli_epi16(maskHi, 4));
// Multiply each component of maskLo and maskHi by srcA
maskLo = _mm_mullo_epi16(maskLo, srcA);
maskHi = _mm_mullo_epi16(maskHi, srcA);
// Left shift mask components by 8 (divide by 256)
maskLo = _mm_srli_epi16(maskLo, 8);
maskHi = _mm_srli_epi16(maskHi, 8);
// Interleave R,G,B into the lower byte of the word
// dstLo = (0, 0, d0R, 0, d0G, 0, d0B, 0, 0, 0, d1R, 0, d1G, 0, d1B, 0)
__m128i dstLo = _mm_unpacklo_epi8(dst, _mm_setzero_si128());
// dstLo = (0, 0, d2R, 0, d2G, 0, d2B, 0, 0, 0, d3R, 0, d3G, 0, d3B, 0)
__m128i dstHi = _mm_unpackhi_epi8(dst, _mm_setzero_si128());
// mask = (src - dst) * mask
maskLo = _mm_mullo_epi16(maskLo, _mm_sub_epi16(src, dstLo));
maskHi = _mm_mullo_epi16(maskHi, _mm_sub_epi16(src, dstHi));
// mask = (src - dst) * mask >> 5
maskLo = _mm_srai_epi16(maskLo, 5);
maskHi = _mm_srai_epi16(maskHi, 5);
// Add two pixels into result.
// result = dst + ((src - dst) * mask >> 5)
__m128i resultLo = _mm_add_epi16(dstLo, maskLo);
__m128i resultHi = _mm_add_epi16(dstHi, maskHi);
// Pack into 4 32bit dst pixels.
// resultLo and resultHi contain eight 16-bit components (two pixels) each.
// Merge into one SSE regsiter with sixteen 8-bit values (four pixels),
// clamping to 255 if necessary.
return _mm_packus_epi16(resultLo, resultHi);
}
static __m128i SkBlendLCD16Opaque_SSE2(__m128i &src, __m128i &dst,
__m128i &mask) {
// In the following comments, the components of src, dst and mask are
// abbreviated as (s)rc, (d)st, and (m)ask. Color components are marked
// by an R, G, B, or A suffix. Components of one of the four pixels that
// are processed in parallel are marked with 0, 1, 2, and 3. "d1B", for
// example is the blue channel of the second destination pixel. Memory
// layout is shown for an ARGB byte order in a color value.
// src and srcA store 8-bit values interleaved with zeros.
// src = (0xFF, 0, sR, 0, sG, 0, sB, 0, 0xFF, 0, sR, 0, sG, 0, sB, 0)
// mask stores 16-bit values (shown as high and low bytes) interleaved with
// zeros
// mask = (m0RGBLo, m0RGBHi, 0, 0, m1RGBLo, m1RGBHi, 0, 0,
// m2RGBLo, m2RGBHi, 0, 0, m3RGBLo, m3RGBHi, 0, 0)
// Get the R,G,B of each 16bit mask pixel, we want all of them in 5 bits.
// r = (0, m0R, 0, 0, 0, m1R, 0, 0, 0, m2R, 0, 0, 0, m3R, 0, 0)
__m128i r = _mm_and_si128(SkPackedR16x5ToUnmaskedR32x5_SSE2(mask),
_mm_set1_epi32(0x1F << SK_R32_SHIFT));
// g = (0, 0, m0G, 0, 0, 0, m1G, 0, 0, 0, m2G, 0, 0, 0, m3G, 0)
__m128i g = _mm_and_si128(SkPackedG16x5ToUnmaskedG32x5_SSE2(mask),
_mm_set1_epi32(0x1F << SK_G32_SHIFT));
// b = (0, 0, 0, m0B, 0, 0, 0, m1B, 0, 0, 0, m2B, 0, 0, 0, m3B)
__m128i b = _mm_and_si128(SkPackedB16x5ToUnmaskedB32x5_SSE2(mask),
_mm_set1_epi32(0x1F << SK_B32_SHIFT));
// Pack the 4 16bit mask pixels into 4 32bit pixels, (p0, p1, p2, p3)
// Each component (m0R, m0G, etc.) is then a 5-bit value aligned to an
// 8-bit position
// mask = (0, m0R, m0G, m0B, 0, m1R, m1G, m1B,
// 0, m2R, m2G, m2B, 0, m3R, m3G, m3B)
mask = _mm_or_si128(_mm_or_si128(r, g), b);
// Interleave R,G,B into the lower byte of word.
// i.e. split the sixteen 8-bit values from mask into two sets of eight
// 16-bit values, padded by zero.
__m128i maskLo, maskHi;
// maskLo = (0, 0, m0R, 0, m0G, 0, m0B, 0, 0, 0, m1R, 0, m1G, 0, m1B, 0)
maskLo = _mm_unpacklo_epi8(mask, _mm_setzero_si128());
// maskHi = (0, 0, m2R, 0, m2G, 0, m2B, 0, 0, 0, m3R, 0, m3G, 0, m3B, 0)
maskHi = _mm_unpackhi_epi8(mask, _mm_setzero_si128());
// Upscale from 0..31 to 0..32
// (allows to replace division by left-shift further down)
// Left-shift each component by 4 and add the result back to that component,
// mapping numbers in the range 0..15 to 0..15, and 16..31 to 17..32
maskLo = _mm_add_epi16(maskLo, _mm_srli_epi16(maskLo, 4));
maskHi = _mm_add_epi16(maskHi, _mm_srli_epi16(maskHi, 4));
// Interleave R,G,B into the lower byte of the word
// dstLo = (0, 0, d0R, 0, d0G, 0, d0B, 0, 0, 0, d1R, 0, d1G, 0, d1B, 0)
__m128i dstLo = _mm_unpacklo_epi8(dst, _mm_setzero_si128());
// dstLo = (0, 0, d2R, 0, d2G, 0, d2B, 0, 0, 0, d3R, 0, d3G, 0, d3B, 0)
__m128i dstHi = _mm_unpackhi_epi8(dst, _mm_setzero_si128());
// mask = (src - dst) * mask
maskLo = _mm_mullo_epi16(maskLo, _mm_sub_epi16(src, dstLo));
maskHi = _mm_mullo_epi16(maskHi, _mm_sub_epi16(src, dstHi));
// mask = (src - dst) * mask >> 5
maskLo = _mm_srai_epi16(maskLo, 5);
maskHi = _mm_srai_epi16(maskHi, 5);
// Add two pixels into result.
// result = dst + ((src - dst) * mask >> 5)
__m128i resultLo = _mm_add_epi16(dstLo, maskLo);
__m128i resultHi = _mm_add_epi16(dstHi, maskHi);
// Pack into 4 32bit dst pixels and force opaque.
// resultLo and resultHi contain eight 16-bit components (two pixels) each.
// Merge into one SSE regsiter with sixteen 8-bit values (four pixels),
// clamping to 255 if necessary. Set alpha components to 0xFF.
return _mm_or_si128(_mm_packus_epi16(resultLo, resultHi),
_mm_set1_epi32(SK_A32_MASK << SK_A32_SHIFT));
}
void SkBlitLCD16Row_SSE2(SkPMColor dst[], const uint16_t mask[],
SkColor src, int width, SkPMColor) {
if (width <= 0) {
return;
}
int srcA = SkColorGetA(src);
int srcR = SkColorGetR(src);
int srcG = SkColorGetG(src);
int srcB = SkColorGetB(src);
srcA = SkAlpha255To256(srcA);
if (width >= 4) {
SkASSERT(((size_t)dst & 0x03) == 0);
while (((size_t)dst & 0x0F) != 0) {
*dst = SkBlendLCD16(srcA, srcR, srcG, srcB, *dst, *mask);
mask++;
dst++;
width--;
}
__m128i *d = reinterpret_cast<__m128i*>(dst);
// Set alpha to 0xFF and replicate source four times in SSE register.
__m128i src_sse = _mm_set1_epi32(SkPackARGB32(0xFF, srcR, srcG, srcB));
// Interleave with zeros to get two sets of four 16-bit values.
src_sse = _mm_unpacklo_epi8(src_sse, _mm_setzero_si128());
// Set srcA_sse to contain eight copies of srcA, padded with zero.
// src_sse=(0xFF, 0, sR, 0, sG, 0, sB, 0, 0xFF, 0, sR, 0, sG, 0, sB, 0)
__m128i srcA_sse = _mm_set1_epi16(srcA);
while (width >= 4) {
// Load four destination pixels into dst_sse.
__m128i dst_sse = _mm_load_si128(d);
// Load four 16-bit masks into lower half of mask_sse.
__m128i mask_sse = _mm_loadl_epi64(
reinterpret_cast<const __m128i*>(mask));
// Check whether masks are equal to 0 and get the highest bit
// of each byte of result, if masks are all zero, we will get
// pack_cmp to 0xFFFF
int pack_cmp = _mm_movemask_epi8(_mm_cmpeq_epi16(mask_sse,
_mm_setzero_si128()));
// if mask pixels are not all zero, we will blend the dst pixels
if (pack_cmp != 0xFFFF) {
// Unpack 4 16bit mask pixels to
// mask_sse = (m0RGBLo, m0RGBHi, 0, 0, m1RGBLo, m1RGBHi, 0, 0,
// m2RGBLo, m2RGBHi, 0, 0, m3RGBLo, m3RGBHi, 0, 0)
mask_sse = _mm_unpacklo_epi16(mask_sse,
_mm_setzero_si128());
// Process 4 32bit dst pixels
__m128i result = SkBlendLCD16_SSE2(src_sse, dst_sse,
mask_sse, srcA_sse);
_mm_store_si128(d, result);
}
d++;
mask += 4;
width -= 4;
}
dst = reinterpret_cast<SkPMColor*>(d);
}
while (width > 0) {
*dst = SkBlendLCD16(srcA, srcR, srcG, srcB, *dst, *mask);
mask++;
dst++;
width--;
}
}
void SkBlitLCD16OpaqueRow_SSE2(SkPMColor dst[], const uint16_t mask[],
SkColor src, int width, SkPMColor opaqueDst) {
if (width <= 0) {
return;
}
int srcR = SkColorGetR(src);
int srcG = SkColorGetG(src);
int srcB = SkColorGetB(src);
if (width >= 4) {
SkASSERT(((size_t)dst & 0x03) == 0);
while (((size_t)dst & 0x0F) != 0) {
*dst = SkBlendLCD16Opaque(srcR, srcG, srcB, *dst, *mask, opaqueDst);
mask++;
dst++;
width--;
}
__m128i *d = reinterpret_cast<__m128i*>(dst);
// Set alpha to 0xFF and replicate source four times in SSE register.
__m128i src_sse = _mm_set1_epi32(SkPackARGB32(0xFF, srcR, srcG, srcB));
// Set srcA_sse to contain eight copies of srcA, padded with zero.
// src_sse=(0xFF, 0, sR, 0, sG, 0, sB, 0, 0xFF, 0, sR, 0, sG, 0, sB, 0)
src_sse = _mm_unpacklo_epi8(src_sse, _mm_setzero_si128());
while (width >= 4) {
// Load four destination pixels into dst_sse.
__m128i dst_sse = _mm_load_si128(d);
// Load four 16-bit masks into lower half of mask_sse.
__m128i mask_sse = _mm_loadl_epi64(
reinterpret_cast<const __m128i*>(mask));
// Check whether masks are equal to 0 and get the highest bit
// of each byte of result, if masks are all zero, we will get
// pack_cmp to 0xFFFF
int pack_cmp = _mm_movemask_epi8(_mm_cmpeq_epi16(mask_sse,
_mm_setzero_si128()));
// if mask pixels are not all zero, we will blend the dst pixels
if (pack_cmp != 0xFFFF) {
// Unpack 4 16bit mask pixels to
// mask_sse = (m0RGBLo, m0RGBHi, 0, 0, m1RGBLo, m1RGBHi, 0, 0,
// m2RGBLo, m2RGBHi, 0, 0, m3RGBLo, m3RGBHi, 0, 0)
mask_sse = _mm_unpacklo_epi16(mask_sse,
_mm_setzero_si128());
// Process 4 32bit dst pixels
__m128i result = SkBlendLCD16Opaque_SSE2(src_sse, dst_sse,
mask_sse);
_mm_store_si128(d, result);
}
d++;
mask += 4;
width -= 4;
}
dst = reinterpret_cast<SkPMColor*>(d);
}
while (width > 0) {
*dst = SkBlendLCD16Opaque(srcR, srcG, srcB, *dst, *mask, opaqueDst);
mask++;
dst++;
width--;
}
}