SDL_blit_A.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
#include "SDL_video.h"
#include "SDL_blit.h"
/* Functions to perform alpha blended blitting */
/* N->1 blending with per-surface alpha */
static void
BlitNto1SurfaceAlpha(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint8 *src = info->src;
int srcskip = info->src_skip;
Uint8 *dst = info->dst;
int dstskip = info->dst_skip;
Uint8 *palmap = info->table;
SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
int srcbpp = srcfmt->BytesPerPixel;
Uint32 Pixel;
unsigned sR, sG, sB;
unsigned dR, dG, dB;
const unsigned A = info->a;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4(
{
DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel, sR, sG, sB);
dR = dstfmt->palette->colors[*dst].r;
dG = dstfmt->palette->colors[*dst].g;
dB = dstfmt->palette->colors[*dst].b;
ALPHA_BLEND_RGB(sR, sG, sB, A, dR, dG, dB);
dR &= 0xff;
dG &= 0xff;
dB &= 0xff;
/* Pack RGB into 8bit pixel */
if ( palmap == NULL ) {
*dst =((dR>>5)<<(3+2))|((dG>>5)<<(2))|((dB>>6)<<(0));
} else {
*dst = palmap[((dR>>5)<<(3+2))|((dG>>5)<<(2))|((dB>>6)<<(0))];
}
dst++;
src += srcbpp;
},
width);
/* *INDENT-ON* */
src += srcskip;
dst += dstskip;
}
}
/* N->1 blending with pixel alpha */
static void
BlitNto1PixelAlpha(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint8 *src = info->src;
int srcskip = info->src_skip;
Uint8 *dst = info->dst;
int dstskip = info->dst_skip;
Uint8 *palmap = info->table;
SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
int srcbpp = srcfmt->BytesPerPixel;
Uint32 Pixel;
unsigned sR, sG, sB, sA;
unsigned dR, dG, dB;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4(
{
DISEMBLE_RGBA(src,srcbpp,srcfmt,Pixel,sR,sG,sB,sA);
dR = dstfmt->palette->colors[*dst].r;
dG = dstfmt->palette->colors[*dst].g;
dB = dstfmt->palette->colors[*dst].b;
ALPHA_BLEND_RGB(sR, sG, sB, sA, dR, dG, dB);
dR &= 0xff;
dG &= 0xff;
dB &= 0xff;
/* Pack RGB into 8bit pixel */
if ( palmap == NULL ) {
*dst =((dR>>5)<<(3+2))|((dG>>5)<<(2))|((dB>>6)<<(0));
} else {
*dst = palmap[((dR>>5)<<(3+2))|((dG>>5)<<(2))|((dB>>6)<<(0))];
}
dst++;
src += srcbpp;
},
width);
/* *INDENT-ON* */
src += srcskip;
dst += dstskip;
}
}
/* colorkeyed N->1 blending with per-surface alpha */
static void
BlitNto1SurfaceAlphaKey(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint8 *src = info->src;
int srcskip = info->src_skip;
Uint8 *dst = info->dst;
int dstskip = info->dst_skip;
Uint8 *palmap = info->table;
SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
int srcbpp = srcfmt->BytesPerPixel;
Uint32 ckey = info->colorkey;
Uint32 Pixel;
unsigned sR, sG, sB;
unsigned dR, dG, dB;
const unsigned A = info->a;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP(
{
DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel, sR, sG, sB);
if ( Pixel != ckey ) {
dR = dstfmt->palette->colors[*dst].r;
dG = dstfmt->palette->colors[*dst].g;
dB = dstfmt->palette->colors[*dst].b;
ALPHA_BLEND_RGB(sR, sG, sB, A, dR, dG, dB);
dR &= 0xff;
dG &= 0xff;
dB &= 0xff;
/* Pack RGB into 8bit pixel */
if ( palmap == NULL ) {
*dst =((dR>>5)<<(3+2))|((dG>>5)<<(2))|((dB>>6)<<(0));
} else {
*dst = palmap[((dR>>5)<<(3+2))|((dG>>5)<<(2))|((dB>>6)<<(0))];
}
}
dst++;
src += srcbpp;
},
width);
/* *INDENT-ON* */
src += srcskip;
dst += dstskip;
}
}
#ifdef __MMX__
/* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */
static void
BlitRGBtoRGBSurfaceAlpha128MMX(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
int srcskip = info->src_skip >> 2;
Uint32 *dstp = (Uint32 *) info->dst;
int dstskip = info->dst_skip >> 2;
Uint32 dalpha = info->dst_fmt->Amask;
__m64 src1, src2, dst1, dst2, lmask, hmask, dsta;
hmask = _mm_set_pi32(0x00fefefe, 0x00fefefe); /* alpha128 mask -> hmask */
lmask = _mm_set_pi32(0x00010101, 0x00010101); /* !alpha128 mask -> lmask */
dsta = _mm_set_pi32(dalpha, dalpha); /* dst alpha mask -> dsta */
while (height--) {
int n = width;
if (n & 1) {
Uint32 s = *srcp++;
Uint32 d = *dstp;
*dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1)
+ (s & d & 0x00010101)) | dalpha;
n--;
}
for (n >>= 1; n > 0; --n) {
dst1 = *(__m64 *) dstp; /* 2 x dst -> dst1(ARGBARGB) */
dst2 = dst1; /* 2 x dst -> dst2(ARGBARGB) */
src1 = *(__m64 *) srcp; /* 2 x src -> src1(ARGBARGB) */
src2 = src1; /* 2 x src -> src2(ARGBARGB) */
dst2 = _mm_and_si64(dst2, hmask); /* dst & mask -> dst2 */
src2 = _mm_and_si64(src2, hmask); /* src & mask -> src2 */
src2 = _mm_add_pi32(src2, dst2); /* dst2 + src2 -> src2 */
src2 = _mm_srli_pi32(src2, 1); /* src2 >> 1 -> src2 */
dst1 = _mm_and_si64(dst1, src1); /* src & dst -> dst1 */
dst1 = _mm_and_si64(dst1, lmask); /* dst1 & !mask -> dst1 */
dst1 = _mm_add_pi32(dst1, src2); /* src2 + dst1 -> dst1 */
dst1 = _mm_or_si64(dst1, dsta); /* dsta(full alpha) | dst1 -> dst1 */
*(__m64 *) dstp = dst1; /* dst1 -> 2 x dst pixels */
dstp += 2;
srcp += 2;
}
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
}
/* fast RGB888->(A)RGB888 blending with surface alpha */
static void
BlitRGBtoRGBSurfaceAlphaMMX(SDL_BlitInfo * info)
{
SDL_PixelFormat *df = info->dst_fmt;
Uint32 chanmask;
unsigned alpha = info->a;
if (alpha == 128 && (df->Rmask | df->Gmask | df->Bmask) == 0x00FFFFFF) {
/* only call a128 version when R,G,B occupy lower bits */
BlitRGBtoRGBSurfaceAlpha128MMX(info);
} else {
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
int srcskip = info->src_skip >> 2;
Uint32 *dstp = (Uint32 *) info->dst;
int dstskip = info->dst_skip >> 2;
Uint32 dalpha = df->Amask;
Uint32 amult;
__m64 src1, src2, dst1, dst2, mm_alpha, mm_zero, dsta;
mm_zero = _mm_setzero_si64(); /* 0 -> mm_zero */
/* form the alpha mult */
amult = alpha | (alpha << 8);
amult = amult | (amult << 16);
chanmask =
(0xff << df->Rshift) | (0xff << df->
Gshift) | (0xff << df->Bshift);
mm_alpha = _mm_set_pi32(0, amult & chanmask); /* 0000AAAA -> mm_alpha, minus 1 chan */
mm_alpha = _mm_unpacklo_pi8(mm_alpha, mm_zero); /* 0A0A0A0A -> mm_alpha, minus 1 chan */
/* at this point mm_alpha can be 000A0A0A or 0A0A0A00 or another combo */
dsta = _mm_set_pi32(dalpha, dalpha); /* dst alpha mask -> dsta */
while (height--) {
int n = width;
if (n & 1) {
/* One Pixel Blend */
src2 = _mm_cvtsi32_si64(*srcp); /* src(ARGB) -> src2 (0000ARGB) */
src2 = _mm_unpacklo_pi8(src2, mm_zero); /* 0A0R0G0B -> src2 */
dst1 = _mm_cvtsi32_si64(*dstp); /* dst(ARGB) -> dst1 (0000ARGB) */
dst1 = _mm_unpacklo_pi8(dst1, mm_zero); /* 0A0R0G0B -> dst1 */
src2 = _mm_sub_pi16(src2, dst1); /* src2 - dst2 -> src2 */
src2 = _mm_mullo_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_srli_pi16(src2, 8); /* src2 >> 8 -> src2 */
dst1 = _mm_add_pi8(src2, dst1); /* src2 + dst1 -> dst1 */
dst1 = _mm_packs_pu16(dst1, mm_zero); /* 0000ARGB -> dst1 */
dst1 = _mm_or_si64(dst1, dsta); /* dsta | dst1 -> dst1 */
*dstp = _mm_cvtsi64_si32(dst1); /* dst1 -> pixel */
++srcp;
++dstp;
n--;
}
for (n >>= 1; n > 0; --n) {
/* Two Pixels Blend */
src1 = *(__m64 *) srcp; /* 2 x src -> src1(ARGBARGB) */
src2 = src1; /* 2 x src -> src2(ARGBARGB) */
src1 = _mm_unpacklo_pi8(src1, mm_zero); /* low - 0A0R0G0B -> src1 */
src2 = _mm_unpackhi_pi8(src2, mm_zero); /* high - 0A0R0G0B -> src2 */
dst1 = *(__m64 *) dstp; /* 2 x dst -> dst1(ARGBARGB) */
dst2 = dst1; /* 2 x dst -> dst2(ARGBARGB) */
dst1 = _mm_unpacklo_pi8(dst1, mm_zero); /* low - 0A0R0G0B -> dst1 */
dst2 = _mm_unpackhi_pi8(dst2, mm_zero); /* high - 0A0R0G0B -> dst2 */
src1 = _mm_sub_pi16(src1, dst1); /* src1 - dst1 -> src1 */
src1 = _mm_mullo_pi16(src1, mm_alpha); /* src1 * alpha -> src1 */
src1 = _mm_srli_pi16(src1, 8); /* src1 >> 8 -> src1 */
dst1 = _mm_add_pi8(src1, dst1); /* src1 + dst1(dst1) -> dst1 */
src2 = _mm_sub_pi16(src2, dst2); /* src2 - dst2 -> src2 */
src2 = _mm_mullo_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_srli_pi16(src2, 8); /* src2 >> 8 -> src2 */
dst2 = _mm_add_pi8(src2, dst2); /* src2 + dst2(dst2) -> dst2 */
dst1 = _mm_packs_pu16(dst1, dst2); /* 0A0R0G0B(res1), 0A0R0G0B(res2) -> dst1(ARGBARGB) */
dst1 = _mm_or_si64(dst1, dsta); /* dsta | dst1 -> dst1 */
*(__m64 *) dstp = dst1; /* dst1 -> 2 x pixel */
srcp += 2;
dstp += 2;
}
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
}
}
/* fast ARGB888->(A)RGB888 blending with pixel alpha */
static void
BlitRGBtoRGBPixelAlphaMMX(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
int srcskip = info->src_skip >> 2;
Uint32 *dstp = (Uint32 *) info->dst;
int dstskip = info->dst_skip >> 2;
SDL_PixelFormat *sf = info->src_fmt;
Uint32 amask = sf->Amask;
Uint32 ashift = sf->Ashift;
Uint64 multmask, multmask2;
__m64 src1, dst1, mm_alpha, mm_zero, mm_alpha2;
mm_zero = _mm_setzero_si64(); /* 0 -> mm_zero */
multmask = 0x00FF;
multmask <<= (ashift * 2);
multmask2 = 0x00FF00FF00FF00FFULL;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4({
Uint32 alpha = *srcp & amask;
if (alpha == 0) {
/* do nothing */
} else if (alpha == amask) {
*dstp = *srcp;
} else {
src1 = _mm_cvtsi32_si64(*srcp); /* src(ARGB) -> src1 (0000ARGB) */
src1 = _mm_unpacklo_pi8(src1, mm_zero); /* 0A0R0G0B -> src1 */
dst1 = _mm_cvtsi32_si64(*dstp); /* dst(ARGB) -> dst1 (0000ARGB) */
dst1 = _mm_unpacklo_pi8(dst1, mm_zero); /* 0A0R0G0B -> dst1 */
mm_alpha = _mm_cvtsi32_si64(alpha); /* alpha -> mm_alpha (0000000A) */
mm_alpha = _mm_srli_si64(mm_alpha, ashift); /* mm_alpha >> ashift -> mm_alpha(0000000A) */
mm_alpha = _mm_unpacklo_pi16(mm_alpha, mm_alpha); /* 00000A0A -> mm_alpha */
mm_alpha2 = _mm_unpacklo_pi32(mm_alpha, mm_alpha); /* 0A0A0A0A -> mm_alpha2 */
mm_alpha = _mm_or_si64(mm_alpha2, *(__m64 *) & multmask); /* 0F0A0A0A -> mm_alpha */
mm_alpha2 = _mm_xor_si64(mm_alpha2, *(__m64 *) & multmask2); /* 255 - mm_alpha -> mm_alpha */
/* blend */
src1 = _mm_mullo_pi16(src1, mm_alpha);
src1 = _mm_srli_pi16(src1, 8);
dst1 = _mm_mullo_pi16(dst1, mm_alpha2);
dst1 = _mm_srli_pi16(dst1, 8);
dst1 = _mm_add_pi16(src1, dst1);
dst1 = _mm_packs_pu16(dst1, mm_zero);
*dstp = _mm_cvtsi64_si32(dst1); /* dst1 -> pixel */
}
++srcp;
++dstp;
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
}
#endif /* __MMX__ */
/* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */
static void
BlitRGBtoRGBSurfaceAlpha128(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
int srcskip = info->src_skip >> 2;
Uint32 *dstp = (Uint32 *) info->dst;
int dstskip = info->dst_skip >> 2;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4({
Uint32 s = *srcp++;
Uint32 d = *dstp;
*dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1)
+ (s & d & 0x00010101)) | 0xff000000;
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
}
/* fast RGB888->(A)RGB888 blending with surface alpha */
static void
BlitRGBtoRGBSurfaceAlpha(SDL_BlitInfo * info)
{
unsigned alpha = info->a;
if (alpha == 128) {
BlitRGBtoRGBSurfaceAlpha128(info);
} else {
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
int srcskip = info->src_skip >> 2;
Uint32 *dstp = (Uint32 *) info->dst;
int dstskip = info->dst_skip >> 2;
Uint32 s;
Uint32 d;
Uint32 s1;
Uint32 d1;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4({
s = *srcp;
d = *dstp;
s1 = s & 0xff00ff;
d1 = d & 0xff00ff;
d1 = (d1 + ((s1 - d1) * alpha >> 8))
& 0xff00ff;
s &= 0xff00;
d &= 0xff00;
d = (d + ((s - d) * alpha >> 8)) & 0xff00;
*dstp = d1 | d | 0xff000000;
++srcp;
++dstp;
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
}
}
/* fast ARGB888->(A)RGB888 blending with pixel alpha */
static void
BlitRGBtoRGBPixelAlpha(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
int srcskip = info->src_skip >> 2;
Uint32 *dstp = (Uint32 *) info->dst;
int dstskip = info->dst_skip >> 2;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4({
Uint32 dalpha;
Uint32 d;
Uint32 s1;
Uint32 d1;
Uint32 s = *srcp;
Uint32 alpha = s >> 24;
/* FIXME: Here we special-case opaque alpha since the
compositioning used (>>8 instead of /255) doesn't handle
it correctly. Also special-case alpha=0 for speed?
Benchmark this! */
if (alpha) {
if (alpha == SDL_ALPHA_OPAQUE) {
*dstp = *srcp;
} else {
/*
* take out the middle component (green), and process
* the other two in parallel. One multiply less.
*/
d = *dstp;
dalpha = d >> 24;
s1 = s & 0xff00ff;
d1 = d & 0xff00ff;
d1 = (d1 + ((s1 - d1) * alpha >> 8)) & 0xff00ff;
s &= 0xff00;
d &= 0xff00;
d = (d + ((s - d) * alpha >> 8)) & 0xff00;
dalpha = alpha + (dalpha * (alpha ^ 0xFF) >> 8);
*dstp = d1 | d | (dalpha << 24);
}
}
++srcp;
++dstp;
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
}
#ifdef __3dNOW__
/* fast (as in MMX with prefetch) ARGB888->(A)RGB888 blending with pixel alpha */
static void
BlitRGBtoRGBPixelAlphaMMX3DNOW(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
int srcskip = info->src_skip >> 2;
Uint32 *dstp = (Uint32 *) info->dst;
int dstskip = info->dst_skip >> 2;
SDL_PixelFormat *sf = info->src_fmt;
Uint32 amask = sf->Amask;
Uint32 ashift = sf->Ashift;
Uint64 multmask, multmask2;
__m64 src1, dst1, mm_alpha, mm_zero, mm_alpha2;
mm_zero = _mm_setzero_si64(); /* 0 -> mm_zero */
multmask = 0x00FF;
multmask <<= (ashift * 2);
multmask2 = 0x00FF00FF00FF00FFULL;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4({
Uint32 alpha;
_m_prefetch(srcp + 16);
_m_prefetch(dstp + 16);
alpha = *srcp & amask;
if (alpha == 0) {
/* do nothing */
} else if (alpha == amask) {
*dstp = *srcp;
} else {
src1 = _mm_cvtsi32_si64(*srcp); /* src(ARGB) -> src1 (0000ARGB) */
src1 = _mm_unpacklo_pi8(src1, mm_zero); /* 0A0R0G0B -> src1 */
dst1 = _mm_cvtsi32_si64(*dstp); /* dst(ARGB) -> dst1 (0000ARGB) */
dst1 = _mm_unpacklo_pi8(dst1, mm_zero); /* 0A0R0G0B -> dst1 */
mm_alpha = _mm_cvtsi32_si64(alpha); /* alpha -> mm_alpha (0000000A) */
mm_alpha = _mm_srli_si64(mm_alpha, ashift); /* mm_alpha >> ashift -> mm_alpha(0000000A) */
mm_alpha = _mm_unpacklo_pi16(mm_alpha, mm_alpha); /* 00000A0A -> mm_alpha */
mm_alpha2 = _mm_unpacklo_pi32(mm_alpha, mm_alpha); /* 0A0A0A0A -> mm_alpha2 */
mm_alpha = _mm_or_si64(mm_alpha2, *(__m64 *) & multmask); /* 0F0A0A0A -> mm_alpha */
mm_alpha2 = _mm_xor_si64(mm_alpha2, *(__m64 *) & multmask2); /* 255 - mm_alpha -> mm_alpha */
/* blend */
src1 = _mm_mullo_pi16(src1, mm_alpha);
src1 = _mm_srli_pi16(src1, 8);
dst1 = _mm_mullo_pi16(dst1, mm_alpha2);
dst1 = _mm_srli_pi16(dst1, 8);
dst1 = _mm_add_pi16(src1, dst1);
dst1 = _mm_packs_pu16(dst1, mm_zero);
*dstp = _mm_cvtsi64_si32(dst1); /* dst1 -> pixel */
}
++srcp;
++dstp;
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
}
#endif /* __3dNOW__ */
/* 16bpp special case for per-surface alpha=50%: blend 2 pixels in parallel */
/* blend a single 16 bit pixel at 50% */
#define BLEND16_50(d, s, mask) \
((((s & mask) + (d & mask)) >> 1) + (s & d & (~mask & 0xffff)))
/* blend two 16 bit pixels at 50% */
#define BLEND2x16_50(d, s, mask) \
(((s & (mask | mask << 16)) >> 1) + ((d & (mask | mask << 16)) >> 1) \
+ (s & d & (~(mask | mask << 16))))
static void
Blit16to16SurfaceAlpha128(SDL_BlitInfo * info, Uint16 mask)
{
int width = info->dst_w;
int height = info->dst_h;
Uint16 *srcp = (Uint16 *) info->src;
int srcskip = info->src_skip >> 1;
Uint16 *dstp = (Uint16 *) info->dst;
int dstskip = info->dst_skip >> 1;
while (height--) {
if (((uintptr_t) srcp ^ (uintptr_t) dstp) & 2) {
/*
* Source and destination not aligned, pipeline it.
* This is mostly a win for big blits but no loss for
* small ones
*/
Uint32 prev_sw;
int w = width;
/* handle odd destination */
if ((uintptr_t) dstp & 2) {
Uint16 d = *dstp, s = *srcp;
*dstp = BLEND16_50(d, s, mask);
dstp++;
srcp++;
w--;
}
srcp++; /* srcp is now 32-bit aligned */
/* bootstrap pipeline with first halfword */
prev_sw = ((Uint32 *) srcp)[-1];
while (w > 1) {
Uint32 sw, dw, s;
sw = *(Uint32 *) srcp;
dw = *(Uint32 *) dstp;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
s = (prev_sw << 16) + (sw >> 16);
#else
s = (prev_sw >> 16) + (sw << 16);
#endif
prev_sw = sw;
*(Uint32 *) dstp = BLEND2x16_50(dw, s, mask);
dstp += 2;
srcp += 2;
w -= 2;
}
/* final pixel if any */
if (w) {
Uint16 d = *dstp, s;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
s = (Uint16) prev_sw;
#else
s = (Uint16) (prev_sw >> 16);
#endif
*dstp = BLEND16_50(d, s, mask);
srcp++;
dstp++;
}
srcp += srcskip - 1;
dstp += dstskip;
} else {
/* source and destination are aligned */
int w = width;
/* first odd pixel? */
if ((uintptr_t) srcp & 2) {
Uint16 d = *dstp, s = *srcp;
*dstp = BLEND16_50(d, s, mask);
srcp++;
dstp++;
w--;
}
/* srcp and dstp are now 32-bit aligned */
while (w > 1) {
Uint32 sw = *(Uint32 *) srcp;
Uint32 dw = *(Uint32 *) dstp;
*(Uint32 *) dstp = BLEND2x16_50(dw, sw, mask);
srcp += 2;
dstp += 2;
w -= 2;
}
/* last odd pixel? */
if (w) {
Uint16 d = *dstp, s = *srcp;
*dstp = BLEND16_50(d, s, mask);
srcp++;
dstp++;
}
srcp += srcskip;
dstp += dstskip;
}
}
}
#ifdef __MMX__
/* fast RGB565->RGB565 blending with surface alpha */
static void
Blit565to565SurfaceAlphaMMX(SDL_BlitInfo * info)
{
unsigned alpha = info->a;
if (alpha == 128) {
Blit16to16SurfaceAlpha128(info, 0xf7de);
} else {
int width = info->dst_w;
int height = info->dst_h;
Uint16 *srcp = (Uint16 *) info->src;
int srcskip = info->src_skip >> 1;
Uint16 *dstp = (Uint16 *) info->dst;
int dstskip = info->dst_skip >> 1;
Uint32 s, d;
__m64 src1, dst1, src2, dst2, gmask, bmask, mm_res, mm_alpha;
alpha &= ~(1 + 2 + 4); /* cut alpha to get the exact same behaviour */
mm_alpha = _mm_set_pi32(0, alpha); /* 0000000A -> mm_alpha */
alpha >>= 3; /* downscale alpha to 5 bits */
mm_alpha = _mm_unpacklo_pi16(mm_alpha, mm_alpha); /* 00000A0A -> mm_alpha */
mm_alpha = _mm_unpacklo_pi32(mm_alpha, mm_alpha); /* 0A0A0A0A -> mm_alpha */
/* position alpha to allow for mullo and mulhi on diff channels
to reduce the number of operations */
mm_alpha = _mm_slli_si64(mm_alpha, 3);
/* Setup the 565 color channel masks */
gmask = _mm_set_pi32(0x07E007E0, 0x07E007E0); /* MASKGREEN -> gmask */
bmask = _mm_set_pi32(0x001F001F, 0x001F001F); /* MASKBLUE -> bmask */
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP_124(
{
s = *srcp++;
d = *dstp;
/*
* shift out the middle component (green) to
* the high 16 bits, and process all three RGB
* components at the same time.
*/
s = (s | s << 16) & 0x07e0f81f;
d = (d | d << 16) & 0x07e0f81f;
d += (s - d) * alpha >> 5;
d &= 0x07e0f81f;
*dstp++ = (Uint16)(d | d >> 16);
},{
s = *srcp++;
d = *dstp;
/*
* shift out the middle component (green) to
* the high 16 bits, and process all three RGB
* components at the same time.
*/
s = (s | s << 16) & 0x07e0f81f;
d = (d | d << 16) & 0x07e0f81f;
d += (s - d) * alpha >> 5;
d &= 0x07e0f81f;
*dstp++ = (Uint16)(d | d >> 16);
s = *srcp++;
d = *dstp;
/*
* shift out the middle component (green) to
* the high 16 bits, and process all three RGB
* components at the same time.
*/
s = (s | s << 16) & 0x07e0f81f;
d = (d | d << 16) & 0x07e0f81f;
d += (s - d) * alpha >> 5;
d &= 0x07e0f81f;
*dstp++ = (Uint16)(d | d >> 16);
},{
src1 = *(__m64*)srcp; /* 4 src pixels -> src1 */
dst1 = *(__m64*)dstp; /* 4 dst pixels -> dst1 */
/* red */
src2 = src1;
src2 = _mm_srli_pi16(src2, 11); /* src2 >> 11 -> src2 [000r 000r 000r 000r] */
dst2 = dst1;
dst2 = _mm_srli_pi16(dst2, 11); /* dst2 >> 11 -> dst2 [000r 000r 000r 000r] */
/* blend */
src2 = _mm_sub_pi16(src2, dst2);/* src - dst -> src2 */
src2 = _mm_mullo_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_srli_pi16(src2, 11); /* src2 >> 11 -> src2 */
dst2 = _mm_add_pi16(src2, dst2); /* src2 + dst2 -> dst2 */
dst2 = _mm_slli_pi16(dst2, 11); /* dst2 << 11 -> dst2 */
mm_res = dst2; /* RED -> mm_res */
/* green -- process the bits in place */
src2 = src1;
src2 = _mm_and_si64(src2, gmask); /* src & MASKGREEN -> src2 */
dst2 = dst1;
dst2 = _mm_and_si64(dst2, gmask); /* dst & MASKGREEN -> dst2 */
/* blend */
src2 = _mm_sub_pi16(src2, dst2);/* src - dst -> src2 */
src2 = _mm_mulhi_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_slli_pi16(src2, 5); /* src2 << 5 -> src2 */
dst2 = _mm_add_pi16(src2, dst2); /* src2 + dst2 -> dst2 */
mm_res = _mm_or_si64(mm_res, dst2); /* RED | GREEN -> mm_res */
/* blue */
src2 = src1;
src2 = _mm_and_si64(src2, bmask); /* src & MASKBLUE -> src2[000b 000b 000b 000b] */
dst2 = dst1;
dst2 = _mm_and_si64(dst2, bmask); /* dst & MASKBLUE -> dst2[000b 000b 000b 000b] */
/* blend */
src2 = _mm_sub_pi16(src2, dst2);/* src - dst -> src2 */
src2 = _mm_mullo_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_srli_pi16(src2, 11); /* src2 >> 11 -> src2 */
dst2 = _mm_add_pi16(src2, dst2); /* src2 + dst2 -> dst2 */
dst2 = _mm_and_si64(dst2, bmask); /* dst2 & MASKBLUE -> dst2 */
mm_res = _mm_or_si64(mm_res, dst2); /* RED | GREEN | BLUE -> mm_res */
*(__m64*)dstp = mm_res; /* mm_res -> 4 dst pixels */
srcp += 4;
dstp += 4;
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
}
}
/* fast RGB555->RGB555 blending with surface alpha */
static void
Blit555to555SurfaceAlphaMMX(SDL_BlitInfo * info)
{
unsigned alpha = info->a;
if (alpha == 128) {
Blit16to16SurfaceAlpha128(info, 0xfbde);
} else {
int width = info->dst_w;
int height = info->dst_h;
Uint16 *srcp = (Uint16 *) info->src;
int srcskip = info->src_skip >> 1;
Uint16 *dstp = (Uint16 *) info->dst;
int dstskip = info->dst_skip >> 1;
Uint32 s, d;
__m64 src1, dst1, src2, dst2, rmask, gmask, bmask, mm_res, mm_alpha;
alpha &= ~(1 + 2 + 4); /* cut alpha to get the exact same behaviour */
mm_alpha = _mm_set_pi32(0, alpha); /* 0000000A -> mm_alpha */
alpha >>= 3; /* downscale alpha to 5 bits */
mm_alpha = _mm_unpacklo_pi16(mm_alpha, mm_alpha); /* 00000A0A -> mm_alpha */
mm_alpha = _mm_unpacklo_pi32(mm_alpha, mm_alpha); /* 0A0A0A0A -> mm_alpha */
/* position alpha to allow for mullo and mulhi on diff channels
to reduce the number of operations */
mm_alpha = _mm_slli_si64(mm_alpha, 3);
/* Setup the 555 color channel masks */
rmask = _mm_set_pi32(0x7C007C00, 0x7C007C00); /* MASKRED -> rmask */
gmask = _mm_set_pi32(0x03E003E0, 0x03E003E0); /* MASKGREEN -> gmask */
bmask = _mm_set_pi32(0x001F001F, 0x001F001F); /* MASKBLUE -> bmask */
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP_124(
{
s = *srcp++;
d = *dstp;
/*
* shift out the middle component (green) to
* the high 16 bits, and process all three RGB
* components at the same time.
*/
s = (s | s << 16) & 0x03e07c1f;
d = (d | d << 16) & 0x03e07c1f;
d += (s - d) * alpha >> 5;
d &= 0x03e07c1f;
*dstp++ = (Uint16)(d | d >> 16);
},{
s = *srcp++;
d = *dstp;
/*
* shift out the middle component (green) to
* the high 16 bits, and process all three RGB
* components at the same time.
*/
s = (s | s << 16) & 0x03e07c1f;
d = (d | d << 16) & 0x03e07c1f;
d += (s - d) * alpha >> 5;
d &= 0x03e07c1f;
*dstp++ = (Uint16)(d | d >> 16);
s = *srcp++;
d = *dstp;
/*
* shift out the middle component (green) to
* the high 16 bits, and process all three RGB
* components at the same time.
*/
s = (s | s << 16) & 0x03e07c1f;
d = (d | d << 16) & 0x03e07c1f;
d += (s - d) * alpha >> 5;
d &= 0x03e07c1f;
*dstp++ = (Uint16)(d | d >> 16);
},{
src1 = *(__m64*)srcp; /* 4 src pixels -> src1 */
dst1 = *(__m64*)dstp; /* 4 dst pixels -> dst1 */
/* red -- process the bits in place */
src2 = src1;
src2 = _mm_and_si64(src2, rmask); /* src & MASKRED -> src2 */
dst2 = dst1;
dst2 = _mm_and_si64(dst2, rmask); /* dst & MASKRED -> dst2 */
/* blend */
src2 = _mm_sub_pi16(src2, dst2);/* src - dst -> src2 */
src2 = _mm_mulhi_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_slli_pi16(src2, 5); /* src2 << 5 -> src2 */
dst2 = _mm_add_pi16(src2, dst2); /* src2 + dst2 -> dst2 */
dst2 = _mm_and_si64(dst2, rmask); /* dst2 & MASKRED -> dst2 */
mm_res = dst2; /* RED -> mm_res */
/* green -- process the bits in place */
src2 = src1;
src2 = _mm_and_si64(src2, gmask); /* src & MASKGREEN -> src2 */
dst2 = dst1;
dst2 = _mm_and_si64(dst2, gmask); /* dst & MASKGREEN -> dst2 */
/* blend */
src2 = _mm_sub_pi16(src2, dst2);/* src - dst -> src2 */
src2 = _mm_mulhi_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_slli_pi16(src2, 5); /* src2 << 5 -> src2 */
dst2 = _mm_add_pi16(src2, dst2); /* src2 + dst2 -> dst2 */
mm_res = _mm_or_si64(mm_res, dst2); /* RED | GREEN -> mm_res */
/* blue */
src2 = src1; /* src -> src2 */
src2 = _mm_and_si64(src2, bmask); /* src & MASKBLUE -> src2[000b 000b 000b 000b] */
dst2 = dst1; /* dst -> dst2 */
dst2 = _mm_and_si64(dst2, bmask); /* dst & MASKBLUE -> dst2[000b 000b 000b 000b] */
/* blend */
src2 = _mm_sub_pi16(src2, dst2);/* src - dst -> src2 */
src2 = _mm_mullo_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_srli_pi16(src2, 11); /* src2 >> 11 -> src2 */
dst2 = _mm_add_pi16(src2, dst2); /* src2 + dst2 -> dst2 */
dst2 = _mm_and_si64(dst2, bmask); /* dst2 & MASKBLUE -> dst2 */
mm_res = _mm_or_si64(mm_res, dst2); /* RED | GREEN | BLUE -> mm_res */
*(__m64*)dstp = mm_res; /* mm_res -> 4 dst pixels */
srcp += 4;
dstp += 4;
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
}
}
#endif /* __MMX__ */
/* fast RGB565->RGB565 blending with surface alpha */
static void
Blit565to565SurfaceAlpha(SDL_BlitInfo * info)
{
unsigned alpha = info->a;
if (alpha == 128) {
Blit16to16SurfaceAlpha128(info, 0xf7de);
} else {
int width = info->dst_w;
int height = info->dst_h;
Uint16 *srcp = (Uint16 *) info->src;
int srcskip = info->src_skip >> 1;
Uint16 *dstp = (Uint16 *) info->dst;
int dstskip = info->dst_skip >> 1;
alpha >>= 3; /* downscale alpha to 5 bits */
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4({
Uint32 s = *srcp++;
Uint32 d = *dstp;
/*
* shift out the middle component (green) to
* the high 16 bits, and process all three RGB
* components at the same time.
*/
s = (s | s << 16) & 0x07e0f81f;
d = (d | d << 16) & 0x07e0f81f;
d += (s - d) * alpha >> 5;
d &= 0x07e0f81f;
*dstp++ = (Uint16)(d | d >> 16);
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
}
}
/* fast RGB555->RGB555 blending with surface alpha */
static void
Blit555to555SurfaceAlpha(SDL_BlitInfo * info)
{
unsigned alpha = info->a; /* downscale alpha to 5 bits */
if (alpha == 128) {
Blit16to16SurfaceAlpha128(info, 0xfbde);
} else {
int width = info->dst_w;
int height = info->dst_h;
Uint16 *srcp = (Uint16 *) info->src;
int srcskip = info->src_skip >> 1;
Uint16 *dstp = (Uint16 *) info->dst;
int dstskip = info->dst_skip >> 1;
alpha >>= 3; /* downscale alpha to 5 bits */
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4({
Uint32 s = *srcp++;
Uint32 d = *dstp;
/*
* shift out the middle component (green) to
* the high 16 bits, and process all three RGB
* components at the same time.
*/
s = (s | s << 16) & 0x03e07c1f;
d = (d | d << 16) & 0x03e07c1f;
d += (s - d) * alpha >> 5;
d &= 0x03e07c1f;
*dstp++ = (Uint16)(d | d >> 16);
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
}
}
/* fast ARGB8888->RGB565 blending with pixel alpha */
static void
BlitARGBto565PixelAlpha(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
int srcskip = info->src_skip >> 2;
Uint16 *dstp = (Uint16 *) info->dst;
int dstskip = info->dst_skip >> 1;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4({
Uint32 s = *srcp;
unsigned alpha = s >> 27; /* downscale alpha to 5 bits */
/* FIXME: Here we special-case opaque alpha since the
compositioning used (>>8 instead of /255) doesn't handle
it correctly. Also special-case alpha=0 for speed?
Benchmark this! */
if(alpha) {
if(alpha == (SDL_ALPHA_OPAQUE >> 3)) {
*dstp = (Uint16)((s >> 8 & 0xf800) + (s >> 5 & 0x7e0) + (s >> 3 & 0x1f));
} else {
Uint32 d = *dstp;
/*
* convert source and destination to G0RAB65565
* and blend all components at the same time
*/
s = ((s & 0xfc00) << 11) + (s >> 8 & 0xf800)
+ (s >> 3 & 0x1f);
d = (d | d << 16) & 0x07e0f81f;
d += (s - d) * alpha >> 5;
d &= 0x07e0f81f;
*dstp = (Uint16)(d | d >> 16);
}
}
srcp++;
dstp++;
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
}
/* fast ARGB8888->RGB555 blending with pixel alpha */
static void
BlitARGBto555PixelAlpha(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
int srcskip = info->src_skip >> 2;
Uint16 *dstp = (Uint16 *) info->dst;
int dstskip = info->dst_skip >> 1;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4({
unsigned alpha;
Uint32 s = *srcp;
alpha = s >> 27; /* downscale alpha to 5 bits */
/* FIXME: Here we special-case opaque alpha since the
compositioning used (>>8 instead of /255) doesn't handle
it correctly. Also special-case alpha=0 for speed?
Benchmark this! */
if(alpha) {
if(alpha == (SDL_ALPHA_OPAQUE >> 3)) {
*dstp = (Uint16)((s >> 9 & 0x7c00) + (s >> 6 & 0x3e0) + (s >> 3 & 0x1f));
} else {
Uint32 d = *dstp;
/*
* convert source and destination to G0RAB65565
* and blend all components at the same time
*/
s = ((s & 0xf800) << 10) + (s >> 9 & 0x7c00)
+ (s >> 3 & 0x1f);
d = (d | d << 16) & 0x03e07c1f;
d += (s - d) * alpha >> 5;
d &= 0x03e07c1f;
*dstp = (Uint16)(d | d >> 16);
}
}
srcp++;
dstp++;
}, width);
/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
}
/* General (slow) N->N blending with per-surface alpha */
static void
BlitNtoNSurfaceAlpha(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint8 *src = info->src;
int srcskip = info->src_skip;
Uint8 *dst = info->dst;
int dstskip = info->dst_skip;
SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
int srcbpp = srcfmt->BytesPerPixel;
int dstbpp = dstfmt->BytesPerPixel;
Uint32 Pixel;
unsigned sR, sG, sB;
unsigned dR, dG, dB, dA;
const unsigned sA = info->a;
if (sA) {
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4(
{
DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel, sR, sG, sB);
DISEMBLE_RGBA(dst, dstbpp, dstfmt, Pixel, dR, dG, dB, dA);
ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA);
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
src += srcbpp;
dst += dstbpp;
},
width);
/* *INDENT-ON* */
src += srcskip;
dst += dstskip;
}
}
}
/* General (slow) colorkeyed N->N blending with per-surface alpha */
static void
BlitNtoNSurfaceAlphaKey(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint8 *src = info->src;
int srcskip = info->src_skip;
Uint8 *dst = info->dst;
int dstskip = info->dst_skip;
SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
Uint32 ckey = info->colorkey;
int srcbpp = srcfmt->BytesPerPixel;
int dstbpp = dstfmt->BytesPerPixel;
Uint32 Pixel;
unsigned sR, sG, sB;
unsigned dR, dG, dB, dA;
const unsigned sA = info->a;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4(
{
RETRIEVE_RGB_PIXEL(src, srcbpp, Pixel);
if(sA && Pixel != ckey) {
RGB_FROM_PIXEL(Pixel, srcfmt, sR, sG, sB);
DISEMBLE_RGBA(dst, dstbpp, dstfmt, Pixel, dR, dG, dB, dA);
ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA);
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
}
src += srcbpp;
dst += dstbpp;
},
width);
/* *INDENT-ON* */
src += srcskip;
dst += dstskip;
}
}
/* General (slow) N->N blending with pixel alpha */
static void
BlitNtoNPixelAlpha(SDL_BlitInfo * info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint8 *src = info->src;
int srcskip = info->src_skip;
Uint8 *dst = info->dst;
int dstskip = info->dst_skip;
SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
int srcbpp;
int dstbpp;
Uint32 Pixel;
unsigned sR, sG, sB, sA;
unsigned dR, dG, dB, dA;
/* Set up some basic variables */
srcbpp = srcfmt->BytesPerPixel;
dstbpp = dstfmt->BytesPerPixel;
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP4(
{
DISEMBLE_RGBA(src, srcbpp, srcfmt, Pixel, sR, sG, sB, sA);
if(sA) {
DISEMBLE_RGBA(dst, dstbpp, dstfmt, Pixel, dR, dG, dB, dA);
ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA);
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
}
src += srcbpp;
dst += dstbpp;
},
width);
/* *INDENT-ON* */
src += srcskip;
dst += dstskip;
}
}
SDL_BlitFunc
SDL_CalculateBlitA(SDL_Surface * surface)
{
SDL_PixelFormat *sf = surface->format;
SDL_PixelFormat *df = surface->map->dst->format;
switch (surface->map->info.flags & ~SDL_COPY_RLE_MASK) {
case SDL_COPY_BLEND:
/* Per-pixel alpha blits */
switch (df->BytesPerPixel) {
case 1:
return BlitNto1PixelAlpha;
case 2:
if (sf->BytesPerPixel == 4 && sf->Amask == 0xff000000
&& sf->Gmask == 0xff00
&& ((sf->Rmask == 0xff && df->Rmask == 0x1f)
|| (sf->Bmask == 0xff && df->Bmask == 0x1f))) {
if (df->Gmask == 0x7e0)
return BlitARGBto565PixelAlpha;
else if (df->Gmask == 0x3e0)
return BlitARGBto555PixelAlpha;
}
return BlitNtoNPixelAlpha;
case 4:
if (sf->Rmask == df->Rmask
&& sf->Gmask == df->Gmask
&& sf->Bmask == df->Bmask && sf->BytesPerPixel == 4) {
#if defined(__MMX__) || defined(__3dNOW__)
if (sf->Rshift % 8 == 0
&& sf->Gshift % 8 == 0
&& sf->Bshift % 8 == 0
&& sf->Ashift % 8 == 0 && sf->Aloss == 0) {
#ifdef __3dNOW__
if (SDL_Has3DNow())
return BlitRGBtoRGBPixelAlphaMMX3DNOW;
#endif
#ifdef __MMX__
if (SDL_HasMMX())
return BlitRGBtoRGBPixelAlphaMMX;
#endif
}
#endif /* __MMX__ || __3dNOW__ */
if (sf->Amask == 0xff000000) {
return BlitRGBtoRGBPixelAlpha;
}
}
return BlitNtoNPixelAlpha;
case 3:
default:
return BlitNtoNPixelAlpha;
}
break;
case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
if (sf->Amask == 0) {
/* Per-surface alpha blits */
switch (df->BytesPerPixel) {
case 1:
return BlitNto1SurfaceAlpha;
case 2:
if (surface->map->identity) {
if (df->Gmask == 0x7e0) {
#ifdef __MMX__
if (SDL_HasMMX())
return Blit565to565SurfaceAlphaMMX;
else
#endif
return Blit565to565SurfaceAlpha;
} else if (df->Gmask == 0x3e0) {
#ifdef __MMX__
if (SDL_HasMMX())
return Blit555to555SurfaceAlphaMMX;
else
#endif
return Blit555to555SurfaceAlpha;
}
}
return BlitNtoNSurfaceAlpha;
case 4:
if (sf->Rmask == df->Rmask
&& sf->Gmask == df->Gmask
&& sf->Bmask == df->Bmask && sf->BytesPerPixel == 4) {
#ifdef __MMX__
if (sf->Rshift % 8 == 0
&& sf->Gshift % 8 == 0
&& sf->Bshift % 8 == 0 && SDL_HasMMX())
return BlitRGBtoRGBSurfaceAlphaMMX;
#endif
if ((sf->Rmask | sf->Gmask | sf->Bmask) == 0xffffff) {
return BlitRGBtoRGBSurfaceAlpha;
}
}
return BlitNtoNSurfaceAlpha;
case 3:
default:
return BlitNtoNSurfaceAlpha;
}
}
break;
case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
if (sf->Amask == 0) {
if (df->BytesPerPixel == 1) {
return BlitNto1SurfaceAlphaKey;
} else {
return BlitNtoNSurfaceAlphaKey;
}
}
break;
}
return NULL;
}
/* vi: set ts=4 sw=4 expandtab: */
SDL_PixelFormat::Aloss
Uint8 Aloss
Definition: SDL_pixels.h:313
SDL_BlitInfo::table
Uint8 * table
Definition: SDL_blit.h:67
dst
GLenum GLenum dst
Definition: SDL_opengl_glext.h:1737
SDL_CalculateBlitA
SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface *surface)
Definition: SDL_blit_A.c:1269
BlitARGBto565PixelAlpha
static void BlitARGBto565PixelAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:1054
BLEND16_50
#define BLEND16_50(d, s, mask)
Definition: SDL_blit_A.c:588
BlitNto1SurfaceAlpha
static void BlitNto1SurfaceAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:30
SDL_Has3DNow
#define SDL_Has3DNow
Definition: SDL_dynapi_overrides.h:112
BlitNtoNSurfaceAlphaKey
static void BlitNtoNSurfaceAlphaKey(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:1186
s
GLdouble s
Definition: SDL_opengl.h:2056
SDL_COPY_COLORKEY
#define SDL_COPY_COLORKEY
Definition: SDL_blit.h:39
width
GLint GLint GLsizei width
Definition: SDL_opengl.h:1565
n
GLdouble n
Definition: SDL_opengl_glext.h:1952
SDL_BlitInfo::src_skip
int src_skip
Definition: SDL_blit.h:60
Uint32
uint32_t Uint32
An unsigned 32-bit integer type.
Definition: SDL_stdinc.h:155
RETRIEVE_RGB_PIXEL
#define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel)
Definition: SDL_blit.h:145
SDL_Color::g
Uint8 g
Definition: SDL_pixels.h:282
SDL_PixelFormat::Gmask
Uint32 Gmask
Definition: SDL_pixels.h:307
ALPHA_BLEND_RGBA
#define ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA)
Definition: SDL_blit.h:453
SDL_PixelFormat::BytesPerPixel
Uint8 BytesPerPixel
Definition: SDL_pixels.h:304
SDL_BlitInfo::flags
int flags
Definition: SDL_blit.h:68
ALPHA_BLEND_RGB
#define ALPHA_BLEND_RGB(sR, sG, sB, A, dR, dG, dB)
Definition: SDL_blit.h:444
BlitNto1SurfaceAlphaKey
static void BlitNto1SurfaceAlphaKey(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:123
SDL_BlitInfo::src_fmt
SDL_PixelFormat * src_fmt
Definition: SDL_blit.h:65
ASSEMBLE_RGBA
#define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a)
Definition: SDL_blit.h:401
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
SDL_PixelFormat::Bmask
Uint32 Bmask
Definition: SDL_pixels.h:308
SDL_PixelFormat::Ashift
Uint8 Ashift
Definition: SDL_pixels.h:317
SDL_COPY_RLE_MASK
#define SDL_COPY_RLE_MASK
Definition: SDL_blit.h:44
SDL_Color::b
Uint8 b
Definition: SDL_pixels.h:283
SDL_BlitInfo::dst_skip
int dst_skip
Definition: SDL_blit.h:64
BlitARGBto555PixelAlpha
static void BlitARGBto555PixelAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:1100
height
GLint GLint GLsizei GLsizei height
Definition: SDL_opengl.h:1565
BlitNtoNPixelAlpha
static void BlitNtoNPixelAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:1227
SDL_BlitInfo::dst_h
int dst_h
Definition: SDL_blit.h:62
Uint64
uint64_t Uint64
An unsigned 64-bit integer type.
Definition: SDL_stdinc.h:164
alpha
GLfloat GLfloat GLfloat alpha
Definition: SDL_opengl_glext.h:412
SDL_BlitInfo::colorkey
Uint32 colorkey
Definition: SDL_blit.h:69
SDL_BlitInfo::dst
Uint8 * dst
Definition: SDL_blit.h:61
SDL_Surface::map
struct SDL_BlitMap * map
Definition: SDL_surface.h:88
Blit555to555SurfaceAlpha
static void Blit555to555SurfaceAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:1015
SDL_video.h
DISEMBLE_RGBA
#define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a)
Definition: SDL_blit.h:352
SDL_Color::r
Uint8 r
Definition: SDL_pixels.h:281
BlitRGBtoRGBSurfaceAlpha128
static void BlitRGBtoRGBSurfaceAlpha128(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:394
SDL_BlitInfo
Definition: SDL_blit.h:55
d
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 SDL_AssertionHandler void SDL_SpinLock SDL_atomic_t int int return SDL_atomic_t return void void void return void return int return SDL_AudioSpec SDL_AudioSpec return int int return return int SDL_RWops int SDL_AudioSpec Uint8 ** d
Definition: SDL_dynapi_procs.h:121
SDL_PixelFormat::Bshift
Uint8 Bshift
Definition: SDL_pixels.h:316
SDL_PixelFormat::Rshift
Uint8 Rshift
Definition: SDL_pixels.h:314
Uint8
uint8_t Uint8
An unsigned 8-bit integer type.
Definition: SDL_stdinc.h:139
RGB_FROM_PIXEL
#define RGB_FROM_PIXEL(Pixel, fmt, r, g, b)
Definition: SDL_blit.h:121
Blit565to565SurfaceAlpha
static void Blit565to565SurfaceAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:976
DUFFS_LOOP4
#define DUFFS_LOOP4(pixel_copy_increment, width)
Definition: SDL_blit.h:487
BlitRGBtoRGBPixelAlpha
static void BlitRGBtoRGBPixelAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:461
DUFFS_LOOP
#define DUFFS_LOOP(pixel_copy_increment, width)
Definition: SDL_blit.h:499
BlitRGBtoRGBSurfaceAlpha
static void BlitRGBtoRGBSurfaceAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:419
uintptr_t
unsigned int uintptr_t
Definition: SDL_config_windows.h:69
SDL_HasMMX
#define SDL_HasMMX
Definition: SDL_dynapi_overrides.h:111
SDL_BlitInfo::src
Uint8 * src
Definition: SDL_blit.h:57
s1
GLuint GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat s1
Definition: SDL_opengl_glext.h:8583
DUFFS_LOOP_124
#define DUFFS_LOOP_124(pixel_copy_increment1,pixel_copy_increment2,pixel_copy_increment4, width)
Definition: SDL_blit.h:503
Blit16to16SurfaceAlpha128
static void Blit16to16SurfaceAlpha128(SDL_BlitInfo *info, Uint16 mask)
Definition: SDL_blit_A.c:597
mask
GLenum GLint GLuint mask
Definition: SDL_opengl_glext.h:657
SDL_BlitInfo::dst_fmt
SDL_PixelFormat * dst_fmt
Definition: SDL_blit.h:66
SDL_BlitMap::dst
SDL_Surface * dst
Definition: SDL_blit.h:87
NULL
#define NULL
Definition: begin_code.h:143
SDL_Palette::colors
SDL_Color * colors
Definition: SDL_pixels.h:291
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:72
SDL_PixelFormat::Gshift
Uint8 Gshift
Definition: SDL_pixels.h:315
SDL_PixelFormat::Rmask
Uint32 Rmask
Definition: SDL_pixels.h:306
SDL_blit.h
SDL_COPY_MODULATE_ALPHA
#define SDL_COPY_MODULATE_ALPHA
Definition: SDL_blit.h:35
BlitNto1PixelAlpha
static void BlitNto1PixelAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:77
SDL_PixelFormat
Definition: SDL_pixels.h:299
SDL_BlitFunc
void(* SDL_BlitFunc)(SDL_BlitInfo *info)
Definition: SDL_blit.h:73
Uint16
uint16_t Uint16
An unsigned 16-bit integer type.
Definition: SDL_stdinc.h:147
BlitNtoNSurfaceAlpha
static void BlitNtoNSurfaceAlpha(SDL_BlitInfo *info)
Definition: SDL_blit_A.c:1147
DISEMBLE_RGB
#define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b)
Definition: SDL_blit.h:176
SDL_PixelFormat::Amask
Uint32 Amask
Definition: SDL_pixels.h:309
w
GLubyte GLubyte GLubyte GLubyte w
Definition: SDL_opengl_glext.h:731
SDL_PixelFormat::palette
SDL_Palette * palette
Definition: SDL_pixels.h:302
SDL_BlitInfo::dst_w
int dst_w
Definition: SDL_blit.h:62
SDL_ALPHA_OPAQUE
#define SDL_ALPHA_OPAQUE
Definition: SDL_pixels.h:45
src
GLenum src
Definition: SDL_opengl_glext.h:1737
SDL_BlitMap::identity
int identity
Definition: SDL_blit.h:88
BLEND2x16_50
#define BLEND2x16_50(d, s, mask)
Definition: SDL_blit_A.c:592
SDL_COPY_BLEND
#define SDL_COPY_BLEND
Definition: SDL_blit.h:36
SDL_BlitMap::info
SDL_BlitInfo info
Definition: SDL_blit.h:91
SDL_BlitInfo::a
Uint8 a
Definition: SDL_blit.h:70