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/* FreeRDP: A Remote Desktop Protocol Client
* Optimized alpha blending routines.
* vi:ts=4 sw=4:
*
* (c) Copyright 2012 Hewlett-Packard Development Company, L.P.
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing
* permissions and limitations under the License.
*
* Note: this code assumes the second operand is fully opaque,
* e.g.
* newval = alpha1*val1 + (1-alpha1)*val2
* rather than
* newval = alpha1*val1 + (1-alpha1)*alpha2*val2
* The IPP gives other options.
*/
#include <freerdp/config.h>
#include <freerdp/types.h>
#include <freerdp/primitives.h>
#include <winpr/sysinfo.h>
#ifdef WITH_SSE2
#include <emmintrin.h>
#include <pmmintrin.h>
#endif /* WITH_SSE2 */
#ifdef WITH_IPP
#include <ippi.h>
#endif /* WITH_IPP */
#include "prim_internal.h"
static primitives_t* generic = NULL;
/* ------------------------------------------------------------------------- */
#ifdef WITH_SSE2
#if !defined(WITH_IPP) || defined(ALL_PRIMITIVES_VERSIONS)
static pstatus_t sse2_alphaComp_argb(const BYTE* WINPR_RESTRICT pSrc1, UINT32 src1Step,
const BYTE* WINPR_RESTRICT pSrc2, UINT32 src2Step,
BYTE* WINPR_RESTRICT pDst, UINT32 dstStep, UINT32 width,
UINT32 height)
{
const UINT32* sptr1 = (const UINT32*)pSrc1;
const UINT32* sptr2 = (const UINT32*)pSrc2;
UINT32* dptr = NULL;
int linebytes = 0;
int src1Jump = 0;
int src2Jump = 0;
int dstJump = 0;
__m128i xmm0;
__m128i xmm1;
if ((width <= 0) || (height <= 0))
return PRIMITIVES_SUCCESS;
if (width < 4) /* pointless if too small */
{
return generic->alphaComp_argb(pSrc1, src1Step, pSrc2, src2Step, pDst, dstStep, width,
height);
}
dptr = (UINT32*)pDst;
linebytes = width * sizeof(UINT32);
src1Jump = (src1Step - linebytes) / sizeof(UINT32);
src2Jump = (src2Step - linebytes) / sizeof(UINT32);
dstJump = (dstStep - linebytes) / sizeof(UINT32);
xmm0 = _mm_set1_epi32(0);
xmm1 = _mm_set1_epi16(1);
for (UINT32 y = 0; y < height; ++y)
{
int pixels = width;
int count = 0;
/* Get to the 16-byte boundary now. */
int leadIn = 0;
switch ((ULONG_PTR)dptr & 0x0f)
{
case 0:
leadIn = 0;
break;
case 4:
leadIn = 3;
break;
case 8:
leadIn = 2;
break;
case 12:
leadIn = 1;
break;
default:
/* We'll never hit a 16-byte boundary, so do the whole
* thing the slow way.
*/
leadIn = width;
break;
}
if (leadIn)
{
pstatus_t status = 0;
status = generic->alphaComp_argb((const BYTE*)sptr1, src1Step, (const BYTE*)sptr2,
src2Step, (BYTE*)dptr, dstStep, leadIn, 1);
if (status != PRIMITIVES_SUCCESS)
return status;
sptr1 += leadIn;
sptr2 += leadIn;
dptr += leadIn;
pixels -= leadIn;
}
/* Use SSE registers to do 4 pixels at a time. */
count = pixels >> 2;
pixels -= count << 2;
while (count--)
{
__m128i xmm2;
__m128i xmm3;
__m128i xmm4;
__m128i xmm5;
__m128i xmm6;
__m128i xmm7;
/* BdGdRdAdBcGcRcAcBbGbRbAbBaGaRaAa */
xmm2 = LOAD_SI128(sptr1);
sptr1 += 4;
/* BhGhRhAhBgGgRgAgBfGfRfAfBeGeReAe */
xmm3 = LOAD_SI128(sptr2);
sptr2 += 4;
/* 00Bb00Gb00Rb00Ab00Ba00Ga00Ra00Aa */
xmm4 = _mm_unpackhi_epi8(xmm2, xmm0);
/* 00Bf00Gf00Bf00Af00Be00Ge00Re00Ae */
xmm5 = _mm_unpackhi_epi8(xmm3, xmm0);
/* subtract */
xmm6 = _mm_subs_epi16(xmm4, xmm5);
/* 00Bb00Gb00Rb00Ab00Aa00Aa00Aa00Aa */
xmm4 = _mm_shufflelo_epi16(xmm4, 0xff);
/* 00Ab00Ab00Ab00Ab00Aa00Aa00Aa00Aa */
xmm4 = _mm_shufflehi_epi16(xmm4, 0xff);
/* Add one to alphas */
xmm4 = _mm_adds_epi16(xmm4, xmm1);
/* Multiply and take low word */
xmm4 = _mm_mullo_epi16(xmm4, xmm6);
/* Shift 8 right */
xmm4 = _mm_srai_epi16(xmm4, 8);
/* Add xmm5 */
xmm4 = _mm_adds_epi16(xmm4, xmm5);
/* 00Bj00Gj00Rj00Aj00Bi00Gi00Ri00Ai */
/* 00Bd00Gd00Rd00Ad00Bc00Gc00Rc00Ac */
xmm5 = _mm_unpacklo_epi8(xmm2, xmm0);
/* 00Bh00Gh00Rh00Ah00Bg00Gg00Rg00Ag */
xmm6 = _mm_unpacklo_epi8(xmm3, xmm0);
/* subtract */
xmm7 = _mm_subs_epi16(xmm5, xmm6);
/* 00Bd00Gd00Rd00Ad00Ac00Ac00Ac00Ac */
xmm5 = _mm_shufflelo_epi16(xmm5, 0xff);
/* 00Ad00Ad00Ad00Ad00Ac00Ac00Ac00Ac */
xmm5 = _mm_shufflehi_epi16(xmm5, 0xff);
/* Add one to alphas */
xmm5 = _mm_adds_epi16(xmm5, xmm1);
/* Multiply and take low word */
xmm5 = _mm_mullo_epi16(xmm5, xmm7);
/* Shift 8 right */
xmm5 = _mm_srai_epi16(xmm5, 8);
/* Add xmm6 */
xmm5 = _mm_adds_epi16(xmm5, xmm6);
/* 00Bl00Gl00Rl00Al00Bk00Gk00Rk0ABk */
/* Must mask off remainders or pack gets confused */
xmm3 = _mm_set1_epi16(0x00ffU);
xmm4 = _mm_and_si128(xmm4, xmm3);
xmm5 = _mm_and_si128(xmm5, xmm3);
/* BlGlRlAlBkGkRkAkBjGjRjAjBiGiRiAi */
xmm5 = _mm_packus_epi16(xmm5, xmm4);
_mm_store_si128((__m128i*)dptr, xmm5);
dptr += 4;
}
/* Finish off the remainder. */
if (pixels)
{
pstatus_t status = 0;
status = generic->alphaComp_argb((const BYTE*)sptr1, src1Step, (const BYTE*)sptr2,
src2Step, (BYTE*)dptr, dstStep, pixels, 1);
if (status != PRIMITIVES_SUCCESS)
return status;
sptr1 += pixels;
sptr2 += pixels;
dptr += pixels;
}
/* Jump to next row. */
sptr1 += src1Jump;
sptr2 += src2Jump;
dptr += dstJump;
}
return PRIMITIVES_SUCCESS;
}
#endif /* !defined(WITH_IPP) || defined(ALL_PRIMITIVES_VERSIONS) */
#endif
#ifdef WITH_IPP
/* ------------------------------------------------------------------------- */
static pstatus_t ipp_alphaComp_argb(const BYTE* pSrc1, INT32 src1Step, const BYTE* pSrc2,
INT32 src2Step, BYTE* pDst, INT32 dstStep, INT32 width,
INT32 height)
{
IppiSize sz;
sz.width = width;
sz.height = height;
return ippiAlphaComp_8u_AC4R(pSrc1, src1Step, pSrc2, src2Step, pDst, dstStep, sz, ippAlphaOver);
}
#endif
/* ------------------------------------------------------------------------- */
void primitives_init_alphaComp_opt(primitives_t* WINPR_RESTRICT prims)
{
generic = primitives_get_generic();
primitives_init_alphaComp(prims);
#ifdef WITH_IPP
prims->alphaComp_argb = ipp_alphaComp_argb;
#elif defined(WITH_SSE2)
if (IsProcessorFeaturePresent(PF_SSE2_INSTRUCTIONS_AVAILABLE) &&
IsProcessorFeaturePresent(PF_SSE3_INSTRUCTIONS_AVAILABLE)) /* for LDDQU */
{
prims->alphaComp_argb = sse2_alphaComp_argb;
}
#endif
}
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