mirror of
https://github.com/Relintai/sdl2_frt.git
synced 2024-12-20 22:16:49 +01:00
1389 lines
46 KiB
C
1389 lines
46 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2019 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:
|
|
break;
|
|
}
|
|
return BlitNtoNPixelAlpha;
|
|
|
|
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: */
|