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SDL_blit_N.c
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SDL_blit_N.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_video.h"
#include "SDL_endian.h"
#include "SDL_cpuinfo.h"
#include "SDL_blit.h"
/* Functions to blit from N-bit surfaces to other surfaces */
#if SDL_ALTIVEC_BLITTERS
#if __MWERKS__
#pragma altivec_model on
#endif
#ifdef HAVE_ALTIVEC_H
#include <altivec.h>
#endif
#define assert(X)
#ifdef __MACOSX__
#include <sys/sysctl.h>
static size_t GetL3CacheSize( void )
{
const char key[] = "hw.l3cachesize";
u_int64_t result = 0;
size_t typeSize = sizeof( result );
int err = sysctlbyname( key, &result, &typeSize, NULL, 0 );
if( 0 != err ) return 0;
return result;
}
#else
static size_t GetL3CacheSize( void )
{
/* XXX: Just guess G4 */
return 2097152;
}
#endif /* __MACOSX__ */
#if (defined(__MACOSX__) && (__GNUC__ < 4))
#define VECUINT8_LITERAL(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
(vector unsigned char) ( a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p )
#define VECUINT16_LITERAL(a,b,c,d,e,f,g,h) \
(vector unsigned short) ( a,b,c,d,e,f,g,h )
#else
#define VECUINT8_LITERAL(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
(vector unsigned char) { a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p }
#define VECUINT16_LITERAL(a,b,c,d,e,f,g,h) \
(vector unsigned short) { a,b,c,d,e,f,g,h }
#endif
#define UNALIGNED_PTR(x) (((size_t) x) & 0x0000000F)
#define VSWIZZLE32(a,b,c,d) (vector unsigned char) \
( 0x00+a, 0x00+b, 0x00+c, 0x00+d, \
0x04+a, 0x04+b, 0x04+c, 0x04+d, \
0x08+a, 0x08+b, 0x08+c, 0x08+d, \
0x0C+a, 0x0C+b, 0x0C+c, 0x0C+d )
#define MAKE8888(dstfmt, r, g, b, a) \
( ((r<<dstfmt->Rshift)&dstfmt->Rmask) | \
((g<<dstfmt->Gshift)&dstfmt->Gmask) | \
((b<<dstfmt->Bshift)&dstfmt->Bmask) | \
((a<<dstfmt->Ashift)&dstfmt->Amask) )
/*
* Data Stream Touch...Altivec cache prefetching.
*
* Don't use this on a G5...however, the speed boost is very significant
* on a G4.
*/
#define DST_CHAN_SRC 1
#define DST_CHAN_DEST 2
/* macro to set DST control word value... */
#define DST_CTRL(size, count, stride) \
(((size) << 24) | ((count) << 16) | (stride))
#define VEC_ALIGNER(src) ((UNALIGNED_PTR(src)) \
? vec_lvsl(0, src) \
: vec_add(vec_lvsl(8, src), vec_splat_u8(8)))
/* Calculate the permute vector used for 32->32 swizzling */
static vector unsigned char calc_swizzle32(const SDL_PixelFormat *srcfmt,
const SDL_PixelFormat *dstfmt)
{
/*
* We have to assume that the bits that aren't used by other
* colors is alpha, and it's one complete byte, since some formats
* leave alpha with a zero mask, but we should still swizzle the bits.
*/
/* ARGB */
const static struct SDL_PixelFormat default_pixel_format = {
NULL, 0, 0,
0, 0, 0, 0,
16, 8, 0, 24,
0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000,
0, 0};
if (!srcfmt) {
srcfmt = &default_pixel_format;
}
if (!dstfmt) {
dstfmt = &default_pixel_format;
}
const vector unsigned char plus = VECUINT8_LITERAL(
0x00, 0x00, 0x00, 0x00,
0x04, 0x04, 0x04, 0x04,
0x08, 0x08, 0x08, 0x08,
0x0C, 0x0C, 0x0C, 0x0C );
vector unsigned char vswiz;
vector unsigned int srcvec;
#define RESHIFT(X) (3 - ((X) >> 3))
Uint32 rmask = RESHIFT(srcfmt->Rshift) << (dstfmt->Rshift);
Uint32 gmask = RESHIFT(srcfmt->Gshift) << (dstfmt->Gshift);
Uint32 bmask = RESHIFT(srcfmt->Bshift) << (dstfmt->Bshift);
Uint32 amask;
/* Use zero for alpha if either surface doesn't have alpha */
if (dstfmt->Amask) {
amask = ((srcfmt->Amask) ? RESHIFT(srcfmt->Ashift) : 0x10) << (dstfmt->Ashift);
} else {
amask = 0x10101010 & ((dstfmt->Rmask | dstfmt->Gmask | dstfmt->Bmask) ^ 0xFFFFFFFF);
}
#undef RESHIFT
((unsigned int *)(char*)&srcvec)[0] = (rmask | gmask | bmask | amask);
vswiz = vec_add(plus, (vector unsigned char)vec_splat(srcvec, 0));
return(vswiz);
}
static void Blit_RGB888_RGB565(SDL_BlitInfo *info);
static void Blit_RGB888_RGB565Altivec(SDL_BlitInfo *info) {
int height = info->d_height;
Uint8 *src = (Uint8 *) info->s_pixels;
int srcskip = info->s_skip;
Uint8 *dst = (Uint8 *) info->d_pixels;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
vector unsigned char valpha = vec_splat_u8(0);
vector unsigned char vpermute = calc_swizzle32(srcfmt, NULL);
vector unsigned char vgmerge = VECUINT8_LITERAL(
0x00, 0x02, 0x00, 0x06,
0x00, 0x0a, 0x00, 0x0e,
0x00, 0x12, 0x00, 0x16,
0x00, 0x1a, 0x00, 0x1e);
vector unsigned short v1 = vec_splat_u16(1);
vector unsigned short v3 = vec_splat_u16(3);
vector unsigned short v3f = VECUINT16_LITERAL(
0x003f, 0x003f, 0x003f, 0x003f,
0x003f, 0x003f, 0x003f, 0x003f);
vector unsigned short vfc = VECUINT16_LITERAL(
0x00fc, 0x00fc, 0x00fc, 0x00fc,
0x00fc, 0x00fc, 0x00fc, 0x00fc);
vector unsigned short vf800 = (vector unsigned short)vec_splat_u8(-7);
vf800 = vec_sl(vf800, vec_splat_u16(8));
while (height--) {
vector unsigned char valigner;
vector unsigned char voverflow;
vector unsigned char vsrc;
int width = info->d_width;
int extrawidth;
/* do scalar until we can align... */
#define ONE_PIXEL_BLEND(condition, widthvar) \
while (condition) { \
Uint32 Pixel; \
unsigned sR, sG, sB, sA; \
DISEMBLE_RGBA((Uint8 *)src, 4, srcfmt, Pixel, \
sR, sG, sB, sA); \
*(Uint16 *)(dst) = (((sR << 8) & 0x0000F800) | \
((sG << 3) & 0x000007E0) | \
((sB >> 3) & 0x0000001F)); \
dst += 2; \
src += 4; \
widthvar--; \
}
ONE_PIXEL_BLEND(((UNALIGNED_PTR(dst)) && (width)), width);
/* After all that work, here's the vector part! */
extrawidth = (width % 8); /* trailing unaligned stores */
width -= extrawidth;
vsrc = vec_ld(0, src);
valigner = VEC_ALIGNER(src);
while (width) {
vector unsigned short vpixel, vrpixel, vgpixel, vbpixel;
vector unsigned int vsrc1, vsrc2;
vector unsigned char vdst;
voverflow = vec_ld(15, src);
vsrc = vec_perm(vsrc, voverflow, valigner);
vsrc1 = (vector unsigned int)vec_perm(vsrc, valpha, vpermute);
src += 16;
vsrc = voverflow;
voverflow = vec_ld(15, src);
vsrc = vec_perm(vsrc, voverflow, valigner);
vsrc2 = (vector unsigned int)vec_perm(vsrc, valpha, vpermute);
/* 1555 */
vpixel = (vector unsigned short)vec_packpx(vsrc1, vsrc2);
vgpixel = (vector unsigned short)vec_perm(vsrc1, vsrc2, vgmerge);
vgpixel = vec_and(vgpixel, vfc);
vgpixel = vec_sl(vgpixel, v3);
vrpixel = vec_sl(vpixel, v1);
vrpixel = vec_and(vrpixel, vf800);
vbpixel = vec_and(vpixel, v3f);
vdst = vec_or((vector unsigned char)vrpixel, (vector unsigned char)vgpixel);
/* 565 */
vdst = vec_or(vdst, (vector unsigned char)vbpixel);
vec_st(vdst, 0, dst);
width -= 8;
src += 16;
dst += 16;
vsrc = voverflow;
}
assert(width == 0);
/* do scalar until we can align... */
ONE_PIXEL_BLEND((extrawidth), extrawidth);
#undef ONE_PIXEL_BLEND
src += srcskip; /* move to next row, accounting for pitch. */
dst += dstskip;
}
}
static void Blit_RGB565_32Altivec(SDL_BlitInfo *info) {
int height = info->d_height;
Uint8 *src = (Uint8 *) info->s_pixels;
int srcskip = info->s_skip;
Uint8 *dst = (Uint8 *) info->d_pixels;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
SDL_PixelFormat *dstfmt = info->dst;
unsigned alpha;
vector unsigned char valpha;
vector unsigned char vpermute;
vector unsigned short vf800;
vector unsigned int v8 = vec_splat_u32(8);
vector unsigned int v16 = vec_add(v8, v8);
vector unsigned short v2 = vec_splat_u16(2);
vector unsigned short v3 = vec_splat_u16(3);
/*
0x10 - 0x1f is the alpha
0x00 - 0x0e evens are the red
0x01 - 0x0f odds are zero
*/
vector unsigned char vredalpha1 = VECUINT8_LITERAL(
0x10, 0x00, 0x01, 0x01,
0x10, 0x02, 0x01, 0x01,
0x10, 0x04, 0x01, 0x01,
0x10, 0x06, 0x01, 0x01
);
vector unsigned char vredalpha2 = (vector unsigned char) (
vec_add((vector unsigned int)vredalpha1, vec_sl(v8, v16))
);
/*
0x00 - 0x0f is ARxx ARxx ARxx ARxx
0x11 - 0x0f odds are blue
*/
vector unsigned char vblue1 = VECUINT8_LITERAL(
0x00, 0x01, 0x02, 0x11,
0x04, 0x05, 0x06, 0x13,
0x08, 0x09, 0x0a, 0x15,
0x0c, 0x0d, 0x0e, 0x17
);
vector unsigned char vblue2 = (vector unsigned char)(
vec_add((vector unsigned int)vblue1, v8)
);
/*
0x00 - 0x0f is ARxB ARxB ARxB ARxB
0x10 - 0x0e evens are green
*/
vector unsigned char vgreen1 = VECUINT8_LITERAL(
0x00, 0x01, 0x10, 0x03,
0x04, 0x05, 0x12, 0x07,
0x08, 0x09, 0x14, 0x0b,
0x0c, 0x0d, 0x16, 0x0f
);
vector unsigned char vgreen2 = (vector unsigned char)(
vec_add((vector unsigned int)vgreen1, vec_sl(v8, v8))
);
assert(srcfmt->BytesPerPixel == 2);
assert(dstfmt->BytesPerPixel == 4);
vf800 = (vector unsigned short)vec_splat_u8(-7);
vf800 = vec_sl(vf800, vec_splat_u16(8));
if (dstfmt->Amask && srcfmt->alpha) {
((unsigned char *)&valpha)[0] = alpha = srcfmt->alpha;
valpha = vec_splat(valpha, 0);
} else {
alpha = 0;
valpha = vec_splat_u8(0);
}
vpermute = calc_swizzle32(NULL, dstfmt);
while (height--) {
vector unsigned char valigner;
vector unsigned char voverflow;
vector unsigned char vsrc;
int width = info->d_width;
int extrawidth;
/* do scalar until we can align... */
#define ONE_PIXEL_BLEND(condition, widthvar) \
while (condition) { \
unsigned sR, sG, sB; \
unsigned short Pixel = *((unsigned short *)src); \
sR = (Pixel >> 8) & 0xf8; \
sG = (Pixel >> 3) & 0xfc; \
sB = (Pixel << 3) & 0xf8; \
ASSEMBLE_RGBA(dst, 4, dstfmt, sR, sG, sB, alpha); \
src += 2; \
dst += 4; \
widthvar--; \
}
ONE_PIXEL_BLEND(((UNALIGNED_PTR(dst)) && (width)), width);
/* After all that work, here's the vector part! */
extrawidth = (width % 8); /* trailing unaligned stores */
width -= extrawidth;
vsrc = vec_ld(0, src);
valigner = VEC_ALIGNER(src);
while (width) {
vector unsigned short vR, vG, vB;
vector unsigned char vdst1, vdst2;
voverflow = vec_ld(15, src);
vsrc = vec_perm(vsrc, voverflow, valigner);
vR = vec_and((vector unsigned short)vsrc, vf800);
vB = vec_sl((vector unsigned short)vsrc, v3);
vG = vec_sl(vB, v2);
vdst1 = (vector unsigned char)vec_perm((vector unsigned char)vR, valpha, vredalpha1);
vdst1 = vec_perm(vdst1, (vector unsigned char)vB, vblue1);
vdst1 = vec_perm(vdst1, (vector unsigned char)vG, vgreen1);
vdst1 = vec_perm(vdst1, valpha, vpermute);
vec_st(vdst1, 0, dst);
vdst2 = (vector unsigned char)vec_perm((vector unsigned char)vR, valpha, vredalpha2);
vdst2 = vec_perm(vdst2, (vector unsigned char)vB, vblue2);
vdst2 = vec_perm(vdst2, (vector unsigned char)vG, vgreen2);
vdst2 = vec_perm(vdst2, valpha, vpermute);
vec_st(vdst2, 16, dst);
width -= 8;
dst += 32;
src += 16;
vsrc = voverflow;
}
assert(width == 0);
/* do scalar until we can align... */
ONE_PIXEL_BLEND((extrawidth), extrawidth);
#undef ONE_PIXEL_BLEND
src += srcskip; /* move to next row, accounting for pitch. */
dst += dstskip;
}
}
static void Blit_RGB555_32Altivec(SDL_BlitInfo *info) {
int height = info->d_height;
Uint8 *src = (Uint8 *) info->s_pixels;
int srcskip = info->s_skip;
Uint8 *dst = (Uint8 *) info->d_pixels;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
SDL_PixelFormat *dstfmt = info->dst;
unsigned alpha;
vector unsigned char valpha;
vector unsigned char vpermute;
vector unsigned short vf800;
vector unsigned int v8 = vec_splat_u32(8);
vector unsigned int v16 = vec_add(v8, v8);
vector unsigned short v1 = vec_splat_u16(1);
vector unsigned short v3 = vec_splat_u16(3);
/*
0x10 - 0x1f is the alpha
0x00 - 0x0e evens are the red
0x01 - 0x0f odds are zero
*/
vector unsigned char vredalpha1 = VECUINT8_LITERAL(
0x10, 0x00, 0x01, 0x01,
0x10, 0x02, 0x01, 0x01,
0x10, 0x04, 0x01, 0x01,
0x10, 0x06, 0x01, 0x01
);
vector unsigned char vredalpha2 = (vector unsigned char)(
vec_add((vector unsigned int)vredalpha1, vec_sl(v8, v16))
);
/*
0x00 - 0x0f is ARxx ARxx ARxx ARxx
0x11 - 0x0f odds are blue
*/
vector unsigned char vblue1 = VECUINT8_LITERAL(
0x00, 0x01, 0x02, 0x11,
0x04, 0x05, 0x06, 0x13,
0x08, 0x09, 0x0a, 0x15,
0x0c, 0x0d, 0x0e, 0x17
);
vector unsigned char vblue2 = (vector unsigned char)(
vec_add((vector unsigned int)vblue1, v8)
);
/*
0x00 - 0x0f is ARxB ARxB ARxB ARxB
0x10 - 0x0e evens are green
*/
vector unsigned char vgreen1 = VECUINT8_LITERAL(
0x00, 0x01, 0x10, 0x03,
0x04, 0x05, 0x12, 0x07,
0x08, 0x09, 0x14, 0x0b,
0x0c, 0x0d, 0x16, 0x0f
);
vector unsigned char vgreen2 = (vector unsigned char)(
vec_add((vector unsigned int)vgreen1, vec_sl(v8, v8))
);
assert(srcfmt->BytesPerPixel == 2);
assert(dstfmt->BytesPerPixel == 4);
vf800 = (vector unsigned short)vec_splat_u8(-7);
vf800 = vec_sl(vf800, vec_splat_u16(8));
if (dstfmt->Amask && srcfmt->alpha) {
((unsigned char *)&valpha)[0] = alpha = srcfmt->alpha;
valpha = vec_splat(valpha, 0);
} else {
alpha = 0;
valpha = vec_splat_u8(0);
}
vpermute = calc_swizzle32(NULL, dstfmt);
while (height--) {
vector unsigned char valigner;
vector unsigned char voverflow;
vector unsigned char vsrc;
int width = info->d_width;
int extrawidth;
/* do scalar until we can align... */
#define ONE_PIXEL_BLEND(condition, widthvar) \
while (condition) { \
unsigned sR, sG, sB; \
unsigned short Pixel = *((unsigned short *)src); \
sR = (Pixel >> 7) & 0xf8; \
sG = (Pixel >> 2) & 0xf8; \
sB = (Pixel << 3) & 0xf8; \
ASSEMBLE_RGBA(dst, 4, dstfmt, sR, sG, sB, alpha); \
src += 2; \
dst += 4; \
widthvar--; \
}
ONE_PIXEL_BLEND(((UNALIGNED_PTR(dst)) && (width)), width);
/* After all that work, here's the vector part! */
extrawidth = (width % 8); /* trailing unaligned stores */
width -= extrawidth;
vsrc = vec_ld(0, src);
valigner = VEC_ALIGNER(src);
while (width) {
vector unsigned short vR, vG, vB;
vector unsigned char vdst1, vdst2;
voverflow = vec_ld(15, src);
vsrc = vec_perm(vsrc, voverflow, valigner);
vR = vec_and(vec_sl((vector unsigned short)vsrc,v1), vf800);
vB = vec_sl((vector unsigned short)vsrc, v3);
vG = vec_sl(vB, v3);
vdst1 = (vector unsigned char)vec_perm((vector unsigned char)vR, valpha, vredalpha1);
vdst1 = vec_perm(vdst1, (vector unsigned char)vB, vblue1);
vdst1 = vec_perm(vdst1, (vector unsigned char)vG, vgreen1);
vdst1 = vec_perm(vdst1, valpha, vpermute);
vec_st(vdst1, 0, dst);
vdst2 = (vector unsigned char)vec_perm((vector unsigned char)vR, valpha, vredalpha2);
vdst2 = vec_perm(vdst2, (vector unsigned char)vB, vblue2);
vdst2 = vec_perm(vdst2, (vector unsigned char)vG, vgreen2);
vdst2 = vec_perm(vdst2, valpha, vpermute);
vec_st(vdst2, 16, dst);
width -= 8;
dst += 32;
src += 16;
vsrc = voverflow;
}
assert(width == 0);
/* do scalar until we can align... */
ONE_PIXEL_BLEND((extrawidth), extrawidth);
#undef ONE_PIXEL_BLEND
src += srcskip; /* move to next row, accounting for pitch. */
dst += dstskip;
}
}
static void BlitNtoNKey(SDL_BlitInfo *info);
static void BlitNtoNKeyCopyAlpha(SDL_BlitInfo *info);
static void Blit32to32KeyAltivec(SDL_BlitInfo *info)
{
int height = info->d_height;
Uint32 *srcp = (Uint32 *) info->s_pixels;
int srcskip = info->s_skip;
Uint32 *dstp = (Uint32 *) info->d_pixels;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
int srcbpp = srcfmt->BytesPerPixel;
SDL_PixelFormat *dstfmt = info->dst;
int dstbpp = dstfmt->BytesPerPixel;
int copy_alpha = (srcfmt->Amask && dstfmt->Amask);
unsigned alpha = dstfmt->Amask ? srcfmt->alpha : 0;
Uint32 rgbmask = srcfmt->Rmask | srcfmt->Gmask | srcfmt->Bmask;
Uint32 ckey = info->src->colorkey;
vector unsigned int valpha;
vector unsigned char vpermute;
vector unsigned char vzero;
vector unsigned int vckey;
vector unsigned int vrgbmask;
vpermute = calc_swizzle32(srcfmt, dstfmt);
if (info->d_width < 16) {
if(copy_alpha) {
BlitNtoNKeyCopyAlpha(info);
} else {
BlitNtoNKey(info);
}
return;
}
vzero = vec_splat_u8(0);
if (alpha) {
((unsigned char *)&valpha)[0] = (unsigned char)alpha;
valpha = (vector unsigned int)vec_splat((vector unsigned char)valpha, 0);
} else {
valpha = (vector unsigned int)vzero;
}
ckey &= rgbmask;
((unsigned int *)(char*)&vckey)[0] = ckey;
vckey = vec_splat(vckey, 0);
((unsigned int *)(char*)&vrgbmask)[0] = rgbmask;
vrgbmask = vec_splat(vrgbmask, 0);
while (height--) {
#define ONE_PIXEL_BLEND(condition, widthvar) \
if (copy_alpha) { \
while (condition) { \
Uint32 Pixel; \
unsigned sR, sG, sB, sA; \
DISEMBLE_RGBA((Uint8 *)srcp, srcbpp, srcfmt, Pixel, \
sR, sG, sB, sA); \
if ( (Pixel & rgbmask) != ckey ) { \
ASSEMBLE_RGBA((Uint8 *)dstp, dstbpp, dstfmt, \
sR, sG, sB, sA); \
} \
dstp = (Uint32 *) (((Uint8 *) dstp) + dstbpp); \
srcp = (Uint32 *) (((Uint8 *) srcp) + srcbpp); \
widthvar--; \
} \
} else { \
while (condition) { \
Uint32 Pixel; \
unsigned sR, sG, sB; \
RETRIEVE_RGB_PIXEL((Uint8 *)srcp, srcbpp, Pixel); \
if ( Pixel != ckey ) { \
RGB_FROM_PIXEL(Pixel, srcfmt, sR, sG, sB); \
ASSEMBLE_RGBA((Uint8 *)dstp, dstbpp, dstfmt, \
sR, sG, sB, alpha); \
} \
dstp = (Uint32 *) (((Uint8 *)dstp) + dstbpp); \
srcp = (Uint32 *) (((Uint8 *)srcp) + srcbpp); \
widthvar--; \
} \
}
int width = info->d_width;
ONE_PIXEL_BLEND((UNALIGNED_PTR(dstp)) && (width), width);
assert(width > 0);
if (width > 0) {
int extrawidth = (width % 4);
vector unsigned char valigner = VEC_ALIGNER(srcp);
vector unsigned int vs = vec_ld(0, srcp);
width -= extrawidth;
assert(width >= 4);
while (width) {
vector unsigned char vsel;
vector unsigned int vd;
vector unsigned int voverflow = vec_ld(15, srcp);
/* load the source vec */
vs = vec_perm(vs, voverflow, valigner);
/* vsel is set for items that match the key */
vsel = (vector unsigned char)vec_and(vs, vrgbmask);
vsel = (vector unsigned char)vec_cmpeq(vs, vckey);
/* permute the src vec to the dest format */
vs = vec_perm(vs, valpha, vpermute);
/* load the destination vec */
vd = vec_ld(0, dstp);
/* select the source and dest into vs */
vd = (vector unsigned int)vec_sel((vector unsigned char)vs, (vector unsigned char)vd, vsel);
vec_st(vd, 0, dstp);
srcp += 4;
width -= 4;
dstp += 4;
vs = voverflow;
}
ONE_PIXEL_BLEND((extrawidth), extrawidth);
#undef ONE_PIXEL_BLEND
srcp += srcskip >> 2;
dstp += dstskip >> 2;
}
}
}
/* Altivec code to swizzle one 32-bit surface to a different 32-bit format. */
/* Use this on a G5 */
static void ConvertAltivec32to32_noprefetch(SDL_BlitInfo *info)
{
int height = info->d_height;
Uint32 *src = (Uint32 *) info->s_pixels;
int srcskip = info->s_skip;
Uint32 *dst = (Uint32 *) info->d_pixels;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
SDL_PixelFormat *dstfmt = info->dst;
vector unsigned int vzero = vec_splat_u32(0);
vector unsigned char vpermute = calc_swizzle32(srcfmt, dstfmt);
if (dstfmt->Amask && !srcfmt->Amask) {
if (srcfmt->alpha) {
vector unsigned char valpha;
((unsigned char *)&valpha)[0] = srcfmt->alpha;
vzero = (vector unsigned int)vec_splat(valpha, 0);
}
}
assert(srcfmt->BytesPerPixel == 4);
assert(dstfmt->BytesPerPixel == 4);
while (height--) {
vector unsigned char valigner;
vector unsigned int vbits;
vector unsigned int voverflow;
Uint32 bits;
Uint8 r, g, b, a;
int width = info->d_width;
int extrawidth;
/* do scalar until we can align... */
while ((UNALIGNED_PTR(dst)) && (width)) {
bits = *(src++);
RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
*(dst++) = MAKE8888(dstfmt, r, g, b, a);
width--;
}
/* After all that work, here's the vector part! */
extrawidth = (width % 4);
width -= extrawidth;
valigner = VEC_ALIGNER(src);
vbits = vec_ld(0, src);
while (width) {
voverflow = vec_ld(15, src);
src += 4;
width -= 4;
vbits = vec_perm(vbits, voverflow, valigner); /* src is ready. */
vbits = vec_perm(vbits, vzero, vpermute); /* swizzle it. */
vec_st(vbits, 0, dst); /* store it back out. */
dst += 4;
vbits = voverflow;
}
assert(width == 0);
/* cover pixels at the end of the row that didn't fit in 16 bytes. */
while (extrawidth) {
bits = *(src++); /* max 7 pixels, don't bother with prefetch. */
RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
*(dst++) = MAKE8888(dstfmt, r, g, b, a);
extrawidth--;
}
src += srcskip >> 2; /* move to next row, accounting for pitch. */
dst += dstskip >> 2;
}
}
/* Altivec code to swizzle one 32-bit surface to a different 32-bit format. */
/* Use this on a G4 */
static void ConvertAltivec32to32_prefetch(SDL_BlitInfo *info)
{
const int scalar_dst_lead = sizeof (Uint32) * 4;
const int vector_dst_lead = sizeof (Uint32) * 16;
int height = info->d_height;
Uint32 *src = (Uint32 *) info->s_pixels;
int srcskip = info->s_skip;
Uint32 *dst = (Uint32 *) info->d_pixels;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
SDL_PixelFormat *dstfmt = info->dst;
vector unsigned int vzero = vec_splat_u32(0);
vector unsigned char vpermute = calc_swizzle32(srcfmt, dstfmt);
if (dstfmt->Amask && !srcfmt->Amask) {
if (srcfmt->alpha) {
vector unsigned char valpha;
((unsigned char *)&valpha)[0] = srcfmt->alpha;
vzero = (vector unsigned int)vec_splat(valpha, 0);
}
}
assert(srcfmt->BytesPerPixel == 4);
assert(dstfmt->BytesPerPixel == 4);
while (height--) {
vector unsigned char valigner;
vector unsigned int vbits;
vector unsigned int voverflow;
Uint32 bits;
Uint8 r, g, b, a;
int width = info->d_width;
int extrawidth;
/* do scalar until we can align... */
while ((UNALIGNED_PTR(dst)) && (width)) {
vec_dstt(src+scalar_dst_lead, DST_CTRL(2,32,1024), DST_CHAN_SRC);
vec_dstst(dst+scalar_dst_lead, DST_CTRL(2,32,1024), DST_CHAN_DEST);
bits = *(src++);
RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
*(dst++) = MAKE8888(dstfmt, r, g, b, a);
width--;
}
/* After all that work, here's the vector part! */
extrawidth = (width % 4);
width -= extrawidth;
valigner = VEC_ALIGNER(src);
vbits = vec_ld(0, src);
while (width) {
vec_dstt(src+vector_dst_lead, DST_CTRL(2,32,1024), DST_CHAN_SRC);
vec_dstst(dst+vector_dst_lead, DST_CTRL(2,32,1024), DST_CHAN_DEST);
voverflow = vec_ld(15, src);
src += 4;
width -= 4;
vbits = vec_perm(vbits, voverflow, valigner); /* src is ready. */
vbits = vec_perm(vbits, vzero, vpermute); /* swizzle it. */
vec_st(vbits, 0, dst); /* store it back out. */
dst += 4;
vbits = voverflow;
}
assert(width == 0);
/* cover pixels at the end of the row that didn't fit in 16 bytes. */
while (extrawidth) {
bits = *(src++); /* max 7 pixels, don't bother with prefetch. */
RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
*(dst++) = MAKE8888(dstfmt, r, g, b, a);
extrawidth--;
}
src += srcskip >> 2; /* move to next row, accounting for pitch. */
dst += dstskip >> 2;
}
vec_dss(DST_CHAN_SRC);
vec_dss(DST_CHAN_DEST);
}
static Uint32 GetBlitFeatures( void )
{
static Uint32 features = 0xffffffff;
if (features == 0xffffffff) {
/* Provide an override for testing .. */
char *override = SDL_getenv("SDL_ALTIVEC_BLIT_FEATURES");
if (override) {
features = 0;
SDL_sscanf(override, "%u", &features);
} else {
features = ( 0
/* Feature 1 is has-MMX */
| ((SDL_HasMMX()) ? 1 : 0)
/* Feature 2 is has-AltiVec */
| ((SDL_HasAltiVec()) ? 2 : 0)
/* Feature 4 is dont-use-prefetch */
/* !!!! FIXME: Check for G5 or later, not the cache size! Always prefetch on a G4. */
| ((GetL3CacheSize() == 0) ? 4 : 0)
);
}
}
return features;
}
#if __MWERKS__
#pragma altivec_model off
#endif
#else
/* Feature 1 is has-MMX */
#define GetBlitFeatures() ((Uint32)(SDL_HasMMX() ? 1 : 0))
#endif
/* This is now endian dependent */
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
#define HI 1
#define LO 0
#else /* SDL_BYTEORDER == SDL_BIG_ENDIAN */
#define HI 0
#define LO 1
#endif
#if SDL_HERMES_BLITTERS
/* Heheheh, we coerce Hermes into using SDL blit information */
#define X86_ASSEMBLER
#define HermesConverterInterface SDL_BlitInfo
#define HermesClearInterface void
#define STACKCALL
#include "../hermes/HeadMMX.h"
#include "../hermes/HeadX86.h"
#else
/* Special optimized blit for RGB 8-8-8 --> RGB 3-3-2 */
#define RGB888_RGB332(dst, src) { \
dst = (Uint8)((((src)&0x00E00000)>>16)| \
(((src)&0x0000E000)>>11)| \
(((src)&0x000000C0)>>6)); \
}
static void Blit_RGB888_index8(SDL_BlitInfo *info)
{
#ifndef USE_DUFFS_LOOP
int c;
#endif
int width, height;
Uint32 *src;
const Uint8 *map;
Uint8 *dst;
int srcskip, dstskip;
/* Set up some basic variables */
width = info->d_width;
height = info->d_height;
src = (Uint32 *)info->s_pixels;
srcskip = info->s_skip/4;
dst = info->d_pixels;
dstskip = info->d_skip;
map = info->table;
if ( map == NULL ) {
while ( height-- ) {
#ifdef USE_DUFFS_LOOP
DUFFS_LOOP(
RGB888_RGB332(*dst++, *src);
, width);
#else
for ( c=width/4; c; --c ) {
/* Pack RGB into 8bit pixel */
++src;
RGB888_RGB332(*dst++, *src);
++src;
RGB888_RGB332(*dst++, *src);
++src;
RGB888_RGB332(*dst++, *src);
++src;
}
switch ( width & 3 ) {
case 3:
RGB888_RGB332(*dst++, *src);
++src;
case 2:
RGB888_RGB332(*dst++, *src);
++src;
case 1:
RGB888_RGB332(*dst++, *src);
++src;
}
#endif /* USE_DUFFS_LOOP */
src += srcskip;
dst += dstskip;
}
} else {
int Pixel;
while ( height-- ) {
#ifdef USE_DUFFS_LOOP
DUFFS_LOOP(
RGB888_RGB332(Pixel, *src);
*dst++ = map[Pixel];
++src;
, width);
#else
for ( c=width/4; c; --c ) {
/* Pack RGB into 8bit pixel */
RGB888_RGB332(Pixel, *src);
*dst++ = map[Pixel];
++src;
RGB888_RGB332(Pixel, *src);
*dst++ = map[Pixel];
++src;
RGB888_RGB332(Pixel, *src);
*dst++ = map[Pixel];
++src;
RGB888_RGB332(Pixel, *src);
*dst++ = map[Pixel];
++src;
}
switch ( width & 3 ) {
case 3:
RGB888_RGB332(Pixel, *src);
*dst++ = map[Pixel];
++src;
case 2:
RGB888_RGB332(Pixel, *src);
*dst++ = map[Pixel];
++src;
case 1:
RGB888_RGB332(Pixel, *src);
*dst++ = map[Pixel];
++src;
}
#endif /* USE_DUFFS_LOOP */
src += srcskip;
dst += dstskip;
}
}
}
/* Special optimized blit for RGB 8-8-8 --> RGB 5-5-5 */
#define RGB888_RGB555(dst, src) { \
*(Uint16 *)(dst) = (Uint16)((((*src)&0x00F80000)>>9)| \
(((*src)&0x0000F800)>>6)| \
(((*src)&0x000000F8)>>3)); \
}
#define RGB888_RGB555_TWO(dst, src) { \
*(Uint32 *)(dst) = (((((src[HI])&0x00F80000)>>9)| \
(((src[HI])&0x0000F800)>>6)| \
(((src[HI])&0x000000F8)>>3))<<16)| \
(((src[LO])&0x00F80000)>>9)| \
(((src[LO])&0x0000F800)>>6)| \
(((src[LO])&0x000000F8)>>3); \
}
static void Blit_RGB888_RGB555(SDL_BlitInfo *info)
{
#ifndef USE_DUFFS_LOOP
int c;
#endif
int width, height;
Uint32 *src;
Uint16 *dst;
int srcskip, dstskip;
/* Set up some basic variables */
width = info->d_width;
height = info->d_height;
src = (Uint32 *)info->s_pixels;
srcskip = info->s_skip/4;
dst = (Uint16 *)info->d_pixels;
dstskip = info->d_skip/2;