This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_blit_N.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#include "SDL_video.h"
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#include "SDL_endian.h"
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#include "SDL_cpuinfo.h"
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#include "SDL_blit.h"
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/* Functions to blit from N-bit surfaces to other surfaces */
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#if SDL_ALTIVEC_BLITTERS
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#if __MWERKS__
#pragma altivec_model on
#endif
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#ifdef HAVE_ALTIVEC_H
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#include <altivec.h>
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#define assert(X)
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#ifdef __MACOSX__
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#include <sys/sysctl.h>
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static size_t
GetL3CacheSize(void)
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{
const char key[] = "hw.l3cachesize";
u_int64_t result = 0;
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size_t typeSize = sizeof(result);
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int err = sysctlbyname(key, &result, &typeSize, NULL, 0);
if (0 != err)
return 0;
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return result;
}
#else
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static size_t
GetL3CacheSize(void)
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{
/* XXX: Just guess G4 */
return 2097152;
}
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#endif /* __MACOSX__ */
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#if (defined(__MACOSX__) && (__GNUC__ < 4))
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#define VECUINT8_LITERAL(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
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(vector unsigned char) ( a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p )
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#define VECUINT16_LITERAL(a,b,c,d,e,f,g,h) \
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(vector unsigned short) ( a,b,c,d,e,f,g,h )
#else
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#define VECUINT8_LITERAL(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
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(vector unsigned char) { a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p }
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#define VECUINT16_LITERAL(a,b,c,d,e,f,g,h) \
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(vector unsigned short) { a,b,c,d,e,f,g,h }
#endif
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#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 */
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static vector unsigned char
calc_swizzle32(const SDL_PixelFormat * srcfmt, const SDL_PixelFormat * dstfmt)
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{
/*
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* We have to assume that the bits that aren't used by other
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* 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,
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if (!srcfmt) {
srcfmt = &default_pixel_format;
}
if (!dstfmt) {
dstfmt = &default_pixel_format;
}
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const vector unsigned char plus = VECUINT8_LITERAL(0x00, 0x00, 0x00, 0x00,
0x04, 0x04, 0x04, 0x04,
0x08, 0x08, 0x08, 0x08,
0x0C, 0x0C, 0x0C,
0x0C);
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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) {
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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);
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}
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static void Blit_RGB888_RGB565(SDL_BlitInfo * info);
static void
Blit_RGB888_RGB565Altivec(SDL_BlitInfo * info)
{
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int height = info->dst_h;
Uint8 *src = (Uint8 *) info->src;
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int srcskip = info->src_skip;
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Uint8 *dst = (Uint8 *) info->dst;
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int dstskip = info->dst_skip;
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SDL_PixelFormat *srcfmt = info->src;
vector unsigned char valpha = vec_splat_u8(0);
vector unsigned char vpermute = calc_swizzle32(srcfmt, NULL);
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vector unsigned char vgmerge = VECUINT8_LITERAL(0x00, 0x02, 0x00, 0x06,
0x00, 0x0a, 0x00, 0x0e,
0x00, 0x12, 0x00, 0x16,
0x00, 0x1a, 0x00, 0x1e);
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vector unsigned short v1 = vec_splat_u16(1);
vector unsigned short v3 = vec_splat_u16(3);
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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);
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vf800 = vec_sl(vf800, vec_splat_u16(8));
while (height--) {
vector unsigned char valigner;
vector unsigned char voverflow;
vector unsigned char vsrc;
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int width = info->dst_w;
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int extrawidth;
/* do scalar until we can align... */
#define ONE_PIXEL_BLEND(condition, widthvar) \
while (condition) { \
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Uint32 Pixel; \
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unsigned sR, sG, sB, sA; \
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DISEMBLE_RGBA((Uint8 *)src, 4, srcfmt, Pixel, \
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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! */
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extrawidth = (width % 8); /* trailing unaligned stores */
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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);
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vsrc1 = (vector unsigned int) vec_perm(vsrc, valpha, vpermute);
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src += 16;
vsrc = voverflow;
voverflow = vec_ld(15, src);
vsrc = vec_perm(vsrc, voverflow, valigner);
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vsrc2 = (vector unsigned int) vec_perm(vsrc, valpha, vpermute);
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/* 1555 */
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vpixel = (vector unsigned short) vec_packpx(vsrc1, vsrc2);
vgpixel = (vector unsigned short) vec_perm(vsrc1, vsrc2, vgmerge);
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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);
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vdst =
vec_or((vector unsigned char) vrpixel,
(vector unsigned char) vgpixel);
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/* 565 */
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vdst = vec_or(vdst, (vector unsigned char) vbpixel);
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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
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src += srcskip; /* move to next row, accounting for pitch. */
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dst += dstskip;
}
}
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static void
Blit_RGB565_32Altivec(SDL_BlitInfo * info)
{
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int height = info->dst_h;
Uint8 *src = (Uint8 *) info->src;
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int srcskip = info->src_skip;
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Uint8 *dst = (Uint8 *) info->dst;
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int dstskip = info->dst_skip;
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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);
/*
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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))
);
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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)
);
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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))
);
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assert(srcfmt->BytesPerPixel == 2);
assert(dstfmt->BytesPerPixel == 4);
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vf800 = (vector unsigned short) vec_splat_u8(-7);
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vf800 = vec_sl(vf800, vec_splat_u16(8));
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if (dstfmt->Amask && info->a) {
((unsigned char *) &valpha)[0] = alpha = info->a;
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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;
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int width = info->dst_w;
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int extrawidth;
/* do scalar until we can align... */
#define ONE_PIXEL_BLEND(condition, widthvar) \
while (condition) { \
unsigned sR, sG, sB; \
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unsigned short Pixel = *((unsigned short *)src); \
sR = (Pixel >> 8) & 0xf8; \
sG = (Pixel >> 3) & 0xfc; \
sB = (Pixel << 3) & 0xf8; \
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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! */
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extrawidth = (width % 8); /* trailing unaligned stores */
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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);
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vR = vec_and((vector unsigned short) vsrc, vf800);
vB = vec_sl((vector unsigned short) vsrc, v3);
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vG = vec_sl(vB, v2);
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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);
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vdst1 = vec_perm(vdst1, valpha, vpermute);
vec_st(vdst1, 0, dst);
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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);
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vdst2 = vec_perm(vdst2, valpha, vpermute);
vec_st(vdst2, 16, dst);
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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
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src += srcskip; /* move to next row, accounting for pitch. */
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dst += dstskip;
}
}
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static void
Blit_RGB555_32Altivec(SDL_BlitInfo * info)
{
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int height = info->dst_h;
Uint8 *src = (Uint8 *) info->src;
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int srcskip = info->src_skip;
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Uint8 *dst = (Uint8 *) info->dst;
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int dstskip = info->dst_skip;
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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);
/*
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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))
);
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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)
);
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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))
);
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assert(srcfmt->BytesPerPixel == 2);
assert(dstfmt->BytesPerPixel == 4);
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vf800 = (vector unsigned short) vec_splat_u8(-7);
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vf800 = vec_sl(vf800, vec_splat_u16(8));
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if (dstfmt->Amask && info->a) {
((unsigned char *) &valpha)[0] = alpha = info->a;
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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;
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int width = info->dst_w;
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int extrawidth;
/* do scalar until we can align... */
#define ONE_PIXEL_BLEND(condition, widthvar) \
while (condition) { \
unsigned sR, sG, sB; \
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unsigned short Pixel = *((unsigned short *)src); \
sR = (Pixel >> 7) & 0xf8; \
sG = (Pixel >> 2) & 0xf8; \
sB = (Pixel << 3) & 0xf8; \
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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! */
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extrawidth = (width % 8); /* trailing unaligned stores */
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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);
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vR = vec_and(vec_sl((vector unsigned short) vsrc, v1), vf800);
vB = vec_sl((vector unsigned short) vsrc, v3);
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vG = vec_sl(vB, v3);
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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);
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vdst1 = vec_perm(vdst1, valpha, vpermute);
vec_st(vdst1, 0, dst);
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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);
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vdst2 = vec_perm(vdst2, valpha, vpermute);
vec_st(vdst2, 16, dst);
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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
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src += srcskip; /* move to next row, accounting for pitch. */
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dst += dstskip;
}
}
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static void BlitNtoNKey(SDL_BlitInfo * info);
static void BlitNtoNKeyCopyAlpha(SDL_BlitInfo * info);
static void
Blit32to32KeyAltivec(SDL_BlitInfo * info)
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int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
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int srcskip = info->src_skip;
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Uint32 *dstp = (Uint32 *) info->dst;
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int dstskip = info->dst_skip;
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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);
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unsigned alpha = dstfmt->Amask ? info->a : 0;
573
Uint32 rgbmask = srcfmt->Rmask | srcfmt->Gmask | srcfmt->Bmask;
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Uint32 ckey = info->colorkey;
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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);
581
if (info->dst_w < 16) {
582
if (copy_alpha) {
583
BlitNtoNKeyCopyAlpha(info);
584
} else {
585
BlitNtoNKey(info);
587
return;
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590
}
vzero = vec_splat_u8(0);
if (alpha) {
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((unsigned char *) &valpha)[0] = (unsigned char) alpha;
valpha =
(vector unsigned int) vec_splat((vector unsigned char) valpha, 0);
594
} else {
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valpha = (vector unsigned int) vzero;
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}
ckey &= rgbmask;
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((unsigned int *) (char *) &vckey)[0] = ckey;
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vckey = vec_splat(vckey, 0);
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((unsigned int *) (char *) &vrgbmask)[0] = rgbmask;
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vrgbmask = vec_splat(vrgbmask, 0);
while (height--) {
#define ONE_PIXEL_BLEND(condition, widthvar) \
if (copy_alpha) { \
while (condition) { \
607
Uint32 Pixel; \
608
unsigned sR, sG, sB, sA; \
609
DISEMBLE_RGBA((Uint8 *)srcp, srcbpp, srcfmt, Pixel, \
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sR, sG, sB, sA); \
611
if ( (Pixel & rgbmask) != ckey ) { \
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ASSEMBLE_RGBA((Uint8 *)dstp, dstbpp, dstfmt, \
sR, sG, sB, sA); \
} \
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dstp = (Uint32 *) (((Uint8 *) dstp) + dstbpp); \
srcp = (Uint32 *) (((Uint8 *) srcp) + srcbpp); \
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widthvar--; \
} \
} else { \
while (condition) { \
621
Uint32 Pixel; \
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unsigned sR, sG, sB; \
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RETRIEVE_RGB_PIXEL((Uint8 *)srcp, srcbpp, Pixel); \
if ( Pixel != ckey ) { \
RGB_FROM_PIXEL(Pixel, srcfmt, sR, sG, sB); \
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ASSEMBLE_RGBA((Uint8 *)dstp, dstbpp, dstfmt, \
sR, sG, sB, alpha); \
} \
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dstp = (Uint32 *) (((Uint8 *)dstp) + dstbpp); \
srcp = (Uint32 *) (((Uint8 *)srcp) + srcbpp); \
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widthvar--; \
} \
}
634
int width = info->dst_w;
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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 */
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vsel = (vector unsigned char) vec_and(vs, vrgbmask);
vsel = (vector unsigned char) vec_cmpeq(vs, vckey);
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/* 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 */
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vd = (vector unsigned int) vec_sel((vector unsigned char) vs,
(vector unsigned char) vd,
vsel);
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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 */
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static void
ConvertAltivec32to32_noprefetch(SDL_BlitInfo * info)
680
681
int height = info->dst_h;
Uint32 *src = (Uint32 *) info->src;
682
int srcskip = info->src_skip;
683
Uint32 *dst = (Uint32 *) info->dst;
684
int dstskip = info->dst_skip;
685
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687
688
689
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) {
690
if (info->a) {
691
vector unsigned char valpha;
692
((unsigned char *) &valpha)[0] = info->a;
693
vzero = (vector unsigned int) vec_splat(valpha, 0);
694
695
696
}
}
697
698
assert(srcfmt->BytesPerPixel == 4);
assert(dstfmt->BytesPerPixel == 4);
699
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701
702
703
704
705
706
while (height--) {
vector unsigned char valigner;
vector unsigned int vbits;
vector unsigned int voverflow;
Uint32 bits;
Uint8 r, g, b, a;
707
int width = info->dst_w;
708
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718
719
720
721
722
723
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);
724
while (width) {
725
726
727
voverflow = vec_ld(15, src);
src += 4;
width -= 4;
728
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730
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. */
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733
734
735
736
737
738
dst += 4;
vbits = voverflow;
}
assert(width == 0);
/* cover pixels at the end of the row that didn't fit in 16 bytes. */
while (extrawidth) {
739
bits = *(src++); /* max 7 pixels, don't bother with prefetch. */
740
741
742
743
744
RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
*(dst++) = MAKE8888(dstfmt, r, g, b, a);
extrawidth--;
}
745
src += srcskip >> 2; /* move to next row, accounting for pitch. */
746
747
748
749
750
751
752
dst += dstskip >> 2;
}
}
/* Altivec code to swizzle one 32-bit surface to a different 32-bit format. */
/* Use this on a G4 */
753
754
static void
ConvertAltivec32to32_prefetch(SDL_BlitInfo * info)
756
757
const int scalar_dst_lead = sizeof(Uint32) * 4;
const int vector_dst_lead = sizeof(Uint32) * 16;
759
760
int height = info->dst_h;
Uint32 *src = (Uint32 *) info->src;
761
int srcskip = info->src_skip;
762
Uint32 *dst = (Uint32 *) info->dst;
763
int dstskip = info->dst_skip;
764
765
766
767
768
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) {
769
if (info->a) {
770
vector unsigned char valpha;
771
((unsigned char *) &valpha)[0] = info->a;
772
vzero = (vector unsigned int) vec_splat(valpha, 0);
773
774
775
}
}
776
777
assert(srcfmt->BytesPerPixel == 4);
assert(dstfmt->BytesPerPixel == 4);
778
779
780
781
782
783
784
785
while (height--) {
vector unsigned char valigner;
vector unsigned int vbits;
vector unsigned int voverflow;
Uint32 bits;
Uint8 r, g, b, a;
786
int width = info->dst_w;
787
788
789
790
int extrawidth;
/* do scalar until we can align... */
while ((UNALIGNED_PTR(dst)) && (width)) {
791
792
793
794
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);
795
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798
799
800
801
802
803
804
805
806
807
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) {
808
809
810
811
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);
812
813
814
voverflow = vec_ld(15, src);
src += 4;
width -= 4;
815
816
817
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. */
818
819
820
dst += 4;
vbits = voverflow;
}
822
823
824
825
assert(width == 0);
/* cover pixels at the end of the row that didn't fit in 16 bytes. */
while (extrawidth) {
826
bits = *(src++); /* max 7 pixels, don't bother with prefetch. */
827
828
829
830
831
RGBA_FROM_8888(bits, srcfmt, r, g, b, a);
*(dst++) = MAKE8888(dstfmt, r, g, b, a);
extrawidth--;
}
832
src += srcskip >> 2; /* move to next row, accounting for pitch. */
833
834
835
836
837
838
839
dst += dstskip >> 2;
}
vec_dss(DST_CHAN_SRC);
vec_dss(DST_CHAN_DEST);
}
840
841
static Uint32
GetBlitFeatures(void)
842
843
844
845
{
static Uint32 features = 0xffffffff;
if (features == 0xffffffff) {
/* Provide an override for testing .. */
846
char *override = SDL_getenv("SDL_ALTIVEC_BLIT_FEATURES");
847
848
if (override) {
features = 0;
849
SDL_sscanf(override, "%u", &features);
850
} else {
851
852
853
854
855
856
857
858
859
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)
);
860
861
862
863
}
}
return features;
}
865
866
867
#if __MWERKS__
#pragma altivec_model off
#endif
868
869
870
871
872
#else
/* Feature 1 is has-MMX */
#define GetBlitFeatures() ((Uint32)(SDL_HasMMX() ? 1 : 0))
#endif
873
/* This is now endian dependent */
874
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
875
876
#define HI 1
#define LO 0
877
#else /* SDL_BYTEORDER == SDL_BIG_ENDIAN */
878
879
880
881
#define HI 0
#define LO 1
#endif
882
883
/* Special optimized blit for RGB 8-8-8 --> RGB 3-3-2 */
#define RGB888_RGB332(dst, src) { \
884
885
886
dst = (Uint8)((((src)&0x00E00000)>>16)| \
(((src)&0x0000E000)>>11)| \
(((src)&0x000000C0)>>6)); \
887
}
888
889
static void
Blit_RGB888_index8(SDL_BlitInfo * info)
890
891
{
#ifndef USE_DUFFS_LOOP
893
#endif
894
895
896
897
898
899
900
int width, height;
Uint32 *src;
const Uint8 *map;
Uint8 *dst;
int srcskip, dstskip;
/* Set up some basic variables */
901
902
903
width = info->dst_w;
height = info->dst_h;
src = (Uint32 *) info->src;
904
srcskip = info->src_skip / 4;
905
dst = info->dst;
906
dstskip = info->dst_skip;
907
908
909
910
map = info->table;
if (map == NULL) {
while (height--) {
911
#ifdef USE_DUFFS_LOOP
912
/* *INDENT-OFF* */
913
914
915
DUFFS_LOOP(
RGB888_RGB332(*dst++, *src);
, width);
916
/* *INDENT-ON* */
917
#else
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
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;
}
939
#endif /* USE_DUFFS_LOOP */
940
941
942
943
944
src += srcskip;
dst += dstskip;
}
} else {
int Pixel;
946
while (height--) {
947
#ifdef USE_DUFFS_LOOP
948
/* *INDENT-OFF* */
949
DUFFS_LOOP(
950
951
RGB888_RGB332(Pixel, *src);
*dst++ = map[Pixel];
952
953
++src;
, width);
954
/* *INDENT-ON* */
955
#else
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
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;
}
985
#endif /* USE_DUFFS_LOOP */
986
987
988
989
src += srcskip;
dst += dstskip;
}
}
990
}
992
993
/* Special optimized blit for RGB 8-8-8 --> RGB 5-5-5 */
#define RGB888_RGB555(dst, src) { \
994
995
996
*(Uint16 *)(dst) = (Uint16)((((*src)&0x00F80000)>>9)| \
(((*src)&0x0000F800)>>6)| \
(((*src)&0x000000F8)>>3)); \
997
998
999
1000
}
#define RGB888_RGB555_TWO(dst, src) { \
*(Uint32 *)(dst) = (((((src[HI])&0x00F80000)>>9)| \
(((src[HI])&0x0000F800)>>6)| \