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Faster blit with CopyAlpha, no ColorKey 

Applied to following formats:

ABGR8888 -> BGRA8888 :  faster x3   (2727179 -> 704761)
ABGR8888 -> RGBA8888 :  faster x3   (2707808 -> 705309)

ARGB8888 -> BGRA8888 :  faster x3   (2745371 -> 712437)
ARGB8888 -> RGBA8888 :  faster x3   (2746230 -> 705236)

BGRA8888 -> ABGR8888 :  faster x3   (2745026 -> 707045)
BGRA8888 -> ARGB8888 :  faster x3   (2752760 -> 727373)
BGRA8888 -> RGBA8888 :  faster x3   (2769544 -> 704607)

RGBA8888 -> ABGR8888 :  faster x3   (2725058 -> 706669)
RGBA8888 -> ARGB8888 :  faster x3   (2704866 -> 707132)
RGBA8888 -> BGRA8888 :  faster x3   (2710351 -> 704615)
This commit is contained in:
Sylvain Becker 2019-02-07 22:03:30 +01:00
parent 704e62bbf4
commit 5fd228921c
1 changed files with 41 additions and 9 deletions
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50
src/video/SDL_blit_N.c
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@ -2151,8 +2151,8 @@ Blit4to4CopyAlpha(SDL_BlitInfo * info)
/* permutation for mapping srcfmt to dstfmt, overloading or not the alpha channel */
static void
get_permutation(SDL_PixelFormat *srcfmt, SDL_PixelFormat *dstfmt,
int *_r , int *_g, int *_b, int *_a, int *_missing)
get_permutation(SDL_PixelFormat *srcfmt, SDL_PixelFormat *dstfmt,
int *_r , int *_g, int *_b, int *_a, int *_missing)
{
int missing = 0, r, g, b, a = 0;
int Pixel = 0x04030201; /* identity permutation */
@ -2162,7 +2162,7 @@ get_permutation(SDL_PixelFormat *srcfmt, SDL_PixelFormat *dstfmt,
} else {
RGB_FROM_PIXEL(Pixel, srcfmt, r, g, b);
}
if (dstfmt->Amask) {
if (srcfmt->Amask) {
PIXEL_FROM_RGBA(Pixel, dstfmt, r, g, b, a);
@ -2228,7 +2228,7 @@ BlitNtoN(SDL_BlitInfo * info)
SDL_PixelFormat *dstfmt = info->dst_fmt;
int dstbpp = dstfmt->BytesPerPixel;
unsigned alpha = dstfmt->Amask ? info->a : 0;
/* Any src/dst 8888, no ARGB2101010 */
if (srcbpp == 4 && dstbpp == 4 &&
srcfmt->format != SDL_PIXELFORMAT_ARGB2101010 &&
@ -2240,7 +2240,7 @@ BlitNtoN(SDL_BlitInfo * info)
/* Find the appropriate permutation */
int missing = 0, r, g, b, a;
get_permutation(srcfmt, dstfmt, &r, &g, &b, &a, &missing);
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP(
@ -2261,7 +2261,7 @@ BlitNtoN(SDL_BlitInfo * info)
}
return;
}
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP(
@ -2297,6 +2297,38 @@ BlitNtoNCopyAlpha(SDL_BlitInfo * info)
int dstbpp = dstfmt->BytesPerPixel;
int c;
/* Any src/dst 8888, no ARGB2101010 */
if (srcbpp == 4 && dstbpp == 4 &&
srcfmt->format != SDL_PIXELFORMAT_ARGB2101010 &&
dstfmt->format != SDL_PIXELFORMAT_ARGB2101010) {
Uint32 *src32 = (Uint32*)src;
Uint32 *dst32 = (Uint32*)dst;
/* Find the appropriate permutation */
int r, g, b, a;
get_permutation(srcfmt, dstfmt, &r, &g, &b, &a, NULL);
while (height--) {
/* *INDENT-OFF* */
DUFFS_LOOP(
{
Uint8 *s8 = (Uint8 *)src32;
Uint8 *d8 = (Uint8 *)dst32;
d8[0] = s8[r];
d8[1] = s8[g];
d8[2] = s8[b];
d8[3] = s8[a];
++src32;
++dst32;
}, width);
/* *INDENT-ON* */
src32 = (Uint32 *)((Uint8 *)src32 + srcskip);
dst32 = (Uint32 *)((Uint8 *)dst32 + dstskip);
}
return;
}
while (height--) {
for (c = width; c; --c) {
Uint32 Pixel;
@ -2484,11 +2516,11 @@ BlitNtoNKey(SDL_BlitInfo * info)
Uint32 *src32 = (Uint32*)src;
Uint32 *dst32 = (Uint32*)dst;
/* Find the appropriate permutation */
int missing = 0, r, g, b, a;
get_permutation(srcfmt, dstfmt, &r, &g, &b, &a, &missing);
if (dstfmt->Amask) {
while (height--) {
/* *INDENT-OFF* */
@ -2510,7 +2542,7 @@ BlitNtoNKey(SDL_BlitInfo * info)
src32 = (Uint32 *)((Uint8 *)src32 + srcskip);
dst32 = (Uint32 *)((Uint8 *)dst32 + dstskip);
}
return;
} else {
while (height--) {