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alphablit.c
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/*
pygame-ce - Python Game Library
Copyright (C) 2000-2001 Pete Shinners
Copyright (C) 2006 Rene Dudfield
Copyright (C) 2007 Marcus von Appen
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Pete Shinners
pete@shinners.org
*/
#define NO_PYGAME_C_API
#include "_surface.h"
#include "simd_shared.h"
#include "simd_blitters.h"
static void
alphablit_alpha(SDL_BlitInfo *info);
static void
alphablit_colorkey(SDL_BlitInfo *info);
static void
alphablit_solid(SDL_BlitInfo *info);
static void
blit_blend_add(SDL_BlitInfo *info);
static void
blit_blend_sub(SDL_BlitInfo *info);
static void
blit_blend_mul(SDL_BlitInfo *info);
static void
blit_blend_min(SDL_BlitInfo *info);
static void
blit_blend_max(SDL_BlitInfo *info);
static void
blit_blend_rgba_add(SDL_BlitInfo *info);
static void
blit_blend_rgba_sub(SDL_BlitInfo *info);
static void
blit_blend_rgba_mul(SDL_BlitInfo *info);
static void
blit_blend_rgba_min(SDL_BlitInfo *info);
static void
blit_blend_rgba_max(SDL_BlitInfo *info);
static void
blit_blend_premultiplied(SDL_BlitInfo *info);
static int
SoftBlitPyGame(SDL_Surface *src, SDL_Rect *srcrect, SDL_Surface *dst,
SDL_Rect *dstrect, int blend_flags);
extern int
SDL_RLESurface(SDL_Surface *surface);
extern void
SDL_UnRLESurface(SDL_Surface *surface, int recode);
static int
SoftBlitPyGame(SDL_Surface *src, SDL_Rect *srcrect, SDL_Surface *dst,
SDL_Rect *dstrect, int blend_flags)
{
int okay;
int src_locked;
int dst_locked;
/* Everything is okay at the beginning... */
okay = 1;
/* Lock the destination if it's in hardware */
dst_locked = 0;
if (SDL_MUSTLOCK(dst)) {
if (SDL_LockSurface(dst) < 0)
okay = 0;
else
dst_locked = 1;
}
/* Lock the source if it's in hardware */
src_locked = 0;
if (SDL_MUSTLOCK(src)) {
if (SDL_LockSurface(src) < 0)
okay = 0;
else
src_locked = 1;
}
/* Set up source and destination buffer pointers, and BLIT! */
if (okay && srcrect->w && srcrect->h) {
SDL_BlitInfo info;
/* Set up the blit information */
info.width = srcrect->w;
info.height = srcrect->h;
info.s_pixels = (Uint8 *)src->pixels +
(Uint16)srcrect->y * src->pitch +
(Uint16)srcrect->x * PG_SURF_BytesPerPixel(src);
info.s_pxskip = PG_SURF_BytesPerPixel(src);
info.s_skip = src->pitch - info.width * PG_SURF_BytesPerPixel(src);
info.d_pixels = (Uint8 *)dst->pixels +
(Uint16)dstrect->y * dst->pitch +
(Uint16)dstrect->x * PG_SURF_BytesPerPixel(dst);
info.d_pxskip = PG_SURF_BytesPerPixel(dst);
info.d_skip = dst->pitch - info.width * PG_SURF_BytesPerPixel(dst);
info.src = src->format;
info.dst = dst->format;
SDL_GetSurfaceAlphaMod(src, &info.src_blanket_alpha);
if ((info.src_has_colorkey = SDL_HasColorKey(src))) {
SDL_GetColorKey(src, &info.src_colorkey);
}
if (SDL_GetSurfaceBlendMode(src, &info.src_blend) ||
SDL_GetSurfaceBlendMode(dst, &info.dst_blend)) {
okay = 0;
}
if (okay) {
if (info.d_pixels > info.s_pixels) {
int span = info.width * PG_FORMAT_BytesPerPixel(info.src);
Uint8 *srcpixend =
info.s_pixels + (info.height - 1) * src->pitch + span;
if (info.d_pixels < srcpixend) {
int dstoffset =
(info.d_pixels - info.s_pixels) % src->pitch;
if (dstoffset < span || dstoffset > src->pitch - span) {
/* Overlapping Self blit with positive destination
offset. Reverse direction of the blit.
*/
info.s_pixels = srcpixend - info.s_pxskip;
info.s_pxskip = -info.s_pxskip;
info.s_skip = -info.s_skip;
info.d_pixels =
(info.d_pixels + (info.height - 1) * dst->pitch +
span - info.d_pxskip);
info.d_pxskip = -info.d_pxskip;
info.d_skip = -info.d_skip;
}
}
}
/* Convert alpha multiply blends to regular blends if either of
the surfaces don't have alpha channels */
if (blend_flags == PYGAME_BLEND_RGBA_MULT &&
(info.src_blend == SDL_BLENDMODE_NONE ||
info.dst_blend == SDL_BLENDMODE_NONE)) {
blend_flags = PYGAME_BLEND_MULT;
}
switch (blend_flags) {
case 0: {
if (info.src_blend != SDL_BLENDMODE_NONE &&
src->format->Amask) {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask) {
/* If our source and destination are the same ARGB
32bit format we can use SSE2/NEON/AVX2 to speed
up the blend */
if (pg_has_avx2() && (src != dst)) {
if (info.src_blanket_alpha != 255) {
alphablit_alpha_avx2_argb_surf_alpha(
&info);
}
else if (SDL_ISPIXELFORMAT_ALPHA(
dst->format->format) &&
info.dst_blend !=
SDL_BLENDMODE_NONE) {
alphablit_alpha_avx2_argb_no_surf_alpha(
&info);
}
else {
alphablit_alpha_avx2_argb_no_surf_alpha_opaque_dst(
&info);
}
break;
}
#if PG_ENABLE_SSE_NEON
if ((pg_HasSSE_NEON()) && (src != dst)) {
if (info.src_blanket_alpha != 255) {
alphablit_alpha_sse2_argb_surf_alpha(
&info);
}
else if (SDL_ISPIXELFORMAT_ALPHA(
dst->format->format) &&
info.dst_blend !=
SDL_BLENDMODE_NONE) {
alphablit_alpha_sse2_argb_no_surf_alpha(
&info);
}
else {
alphablit_alpha_sse2_argb_no_surf_alpha_opaque_dst(
&info);
}
break;
}
#endif /* PG_ENABLE_SSE_NEON */
}
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
alphablit_alpha(&info);
}
else if (info.src_has_colorkey) {
alphablit_colorkey(&info);
}
else {
alphablit_solid(&info);
}
break;
}
case PYGAME_BLEND_ADD: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgb_add_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgb_add_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_add(&info);
break;
}
case PYGAME_BLEND_SUB: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgb_sub_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgb_sub_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_sub(&info);
break;
}
case PYGAME_BLEND_MULT: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgb_mul_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgb_mul_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_mul(&info);
break;
}
case PYGAME_BLEND_MIN: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgb_min_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgb_min_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_min(&info);
break;
}
case PYGAME_BLEND_MAX: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgb_max_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
!(src->format->Amask != 0 && dst->format->Amask != 0 &&
src->format->Amask != dst->format->Amask) &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgb_max_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_max(&info);
break;
}
case PYGAME_BLEND_RGBA_ADD: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgba_add_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgba_add_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_rgba_add(&info);
break;
}
case PYGAME_BLEND_RGBA_SUB: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgba_sub_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgba_sub_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_rgba_sub(&info);
break;
}
case PYGAME_BLEND_RGBA_MULT: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgba_mul_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgba_mul_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_rgba_mul(&info);
break;
}
case PYGAME_BLEND_RGBA_MIN: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgba_min_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgba_min_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_rgba_min(&info);
break;
}
case PYGAME_BLEND_RGBA_MAX: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_has_avx2() && (src != dst)) {
blit_blend_rgba_max_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_rgba_max_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_rgba_max(&info);
break;
}
case PYGAME_BLEND_PREMULTIPLIED: {
#if !defined(__EMSCRIPTEN__)
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_has_avx2() && (src != dst)) {
blit_blend_premultiplied_avx2(&info);
break;
}
#if PG_ENABLE_SSE_NEON
if (PG_SURF_BytesPerPixel(src) == 4 &&
PG_SURF_BytesPerPixel(dst) == 4 &&
src->format->Rmask == dst->format->Rmask &&
src->format->Gmask == dst->format->Gmask &&
src->format->Bmask == dst->format->Bmask &&
src->format->Amask == 0xFF000000 &&
info.src_blend != SDL_BLENDMODE_NONE &&
pg_HasSSE_NEON() && (src != dst)) {
blit_blend_premultiplied_sse2(&info);
break;
}
#endif /* PG_ENABLE_SSE_NEON */
#endif /* SDL_BYTEORDER == SDL_LIL_ENDIAN */
#endif /* __EMSCRIPTEN__ */
blit_blend_premultiplied(&info);
break;
}
default: {
SDL_SetError("Invalid argument passed to blit.");
okay = 0;
break;
}
}
}
}
/* We need to unlock the surfaces if they're locked */
if (dst_locked)
SDL_UnlockSurface(dst);
if (src_locked)
SDL_UnlockSurface(src);
/* Blit is done! */
return (okay ? 0 : -1);
}
/* --------------------------------------------------------- */
static void
blit_blend_rgba_add(SDL_BlitInfo *info)
{
int n;
int width = info->width;
int height = info->height;
Uint8 *src = info->s_pixels;
int srcpxskip = info->s_pxskip;
int srcskip = info->s_skip;
Uint8 *dst = info->d_pixels;
int dstpxskip = info->d_pxskip;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
SDL_PixelFormat *dstfmt = info->dst;
int srcbpp = PG_FORMAT_BytesPerPixel(srcfmt);
int dstbpp = PG_FORMAT_BytesPerPixel(dstfmt);
Uint8 dR, dG, dB, dA, sR, sG, sB, sA;
Uint32 pixel;
Uint32 tmp;
int srcppa = info->src_blend != SDL_BLENDMODE_NONE && srcfmt->Amask;
int dstppa = info->dst_blend != SDL_BLENDMODE_NONE && dstfmt->Amask;
if (!dstppa) {
blit_blend_add(info);
return;
}
if (srcbpp == 4 && dstbpp == 4 && srcfmt->Rmask == dstfmt->Rmask &&
srcfmt->Gmask == dstfmt->Gmask && srcfmt->Bmask == dstfmt->Bmask &&
srcfmt->Amask == dstfmt->Amask &&
info->src_blend != SDL_BLENDMODE_NONE) {
int incr = srcpxskip > 0 ? 1 : -1;
if (incr < 0) {
src += 3;
dst += 3;
}
while (height--) {
LOOP_UNROLLED4(
{
REPEAT_4({
tmp = (*dst) + (*src);
(*dst) = (tmp <= 255 ? tmp : 255);
src += incr;
dst += incr;
});
},
n, width);
src += srcskip;
dst += dstskip;
}
return;
}
if (srcbpp == 1) {
if (dstbpp == 1) {
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXELVALS_1(sR, sG, sB, sA, src, srcfmt);
GET_PIXELVALS_1(dR, dG, dB, dA, dst, dstfmt);
BLEND_RGBA_ADD(tmp, sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
else /* dstbpp > 1 */
{
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXELVALS_1(sR, sG, sB, sA, src, srcfmt);
GET_PIXEL(pixel, dstbpp, dst);
GET_PIXELVALS(dR, dG, dB, dA, pixel, dstfmt, dstppa);
BLEND_RGBA_ADD(tmp, sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
}
else /* srcbpp > 1 */
{
if (dstbpp == 1) {
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXEL(pixel, srcbpp, src);
GET_PIXELVALS(sR, sG, sB, sA, pixel, srcfmt, srcppa);
GET_PIXELVALS_1(dR, dG, dB, dA, dst, dstfmt);
BLEND_RGBA_ADD(tmp, sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
else /* dstbpp > 1 */
{
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXEL(pixel, srcbpp, src);
GET_PIXELVALS(sR, sG, sB, sA, pixel, srcfmt, srcppa);
GET_PIXEL(pixel, dstbpp, dst);
GET_PIXELVALS(dR, dG, dB, dA, pixel, dstfmt, dstppa);
BLEND_RGBA_ADD(tmp, sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
}
}
static void
blit_blend_rgba_sub(SDL_BlitInfo *info)
{
int n;
int width = info->width;
int height = info->height;
Uint8 *src = info->s_pixels;
int srcpxskip = info->s_pxskip;
int srcskip = info->s_skip;
Uint8 *dst = info->d_pixels;
int dstpxskip = info->d_pxskip;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
SDL_PixelFormat *dstfmt = info->dst;
int srcbpp = PG_FORMAT_BytesPerPixel(srcfmt);
int dstbpp = PG_FORMAT_BytesPerPixel(dstfmt);
Uint8 dR, dG, dB, dA, sR, sG, sB, sA;
Uint32 pixel;
Sint32 tmp2;
int srcppa = info->src_blend != SDL_BLENDMODE_NONE && srcfmt->Amask;
int dstppa = info->dst_blend != SDL_BLENDMODE_NONE && dstfmt->Amask;
if (!dstppa) {
blit_blend_sub(info);
return;
}
if (srcbpp == 4 && dstbpp == 4 && srcfmt->Rmask == dstfmt->Rmask &&
srcfmt->Gmask == dstfmt->Gmask && srcfmt->Bmask == dstfmt->Bmask &&
srcfmt->Amask == dstfmt->Amask &&
info->src_blend != SDL_BLENDMODE_NONE) {
int incr = srcpxskip > 0 ? 1 : -1;
if (incr < 0) {
src += 3;
dst += 3;
}
while (height--) {
LOOP_UNROLLED4(
{
REPEAT_4({
tmp2 = (*dst) - (*src);
(*dst) = (tmp2 >= 0 ? tmp2 : 0);
src += incr;
dst += incr;
});
},
n, width);
src += srcskip;
dst += dstskip;
}
return;
}
if (srcbpp == 1) {
if (dstbpp == 1) {
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXELVALS_1(sR, sG, sB, sA, src, srcfmt);
GET_PIXELVALS_1(dR, dG, dB, dA, dst, dstfmt);
BLEND_RGBA_SUB(tmp2, sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
else /* dstbpp > 1 */
{
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXELVALS_1(sR, sG, sB, sA, src, srcfmt);
GET_PIXEL(pixel, dstbpp, dst);
GET_PIXELVALS(dR, dG, dB, dA, pixel, dstfmt, dstppa);
BLEND_RGBA_SUB(tmp2, sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
}
else /* srcbpp > 1 */
{
if (dstbpp == 1) {
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXEL(pixel, srcbpp, src);
GET_PIXELVALS(sR, sG, sB, sA, pixel, srcfmt, srcppa);
GET_PIXELVALS_1(dR, dG, dB, dA, dst, dstfmt);
BLEND_RGBA_SUB(tmp2, sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
else /* dstbpp > 1 */
{
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXEL(pixel, srcbpp, src);
GET_PIXELVALS(sR, sG, sB, sA, pixel, srcfmt, srcppa);
GET_PIXEL(pixel, dstbpp, dst);
GET_PIXELVALS(dR, dG, dB, dA, pixel, dstfmt, dstppa);
BLEND_RGBA_SUB(tmp2, sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
}
}
static void
blit_blend_rgba_mul(SDL_BlitInfo *info)
{
int n;
int width = info->width;
int height = info->height;
Uint8 *src = info->s_pixels;
int srcpxskip = info->s_pxskip;
int srcskip = info->s_skip;
Uint8 *dst = info->d_pixels;
int dstpxskip = info->d_pxskip;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
SDL_PixelFormat *dstfmt = info->dst;
int srcbpp = PG_FORMAT_BytesPerPixel(srcfmt);
int dstbpp = PG_FORMAT_BytesPerPixel(dstfmt);
Uint8 dR, dG, dB, dA, sR, sG, sB, sA;
Uint32 pixel;
Uint32 tmp;
int srcppa = info->src_blend != SDL_BLENDMODE_NONE && srcfmt->Amask;
int dstppa = info->dst_blend != SDL_BLENDMODE_NONE && dstfmt->Amask;
if (!dstppa) {
blit_blend_mul(info);
return;
}
if (srcbpp == 4 && dstbpp == 4 && srcfmt->Rmask == dstfmt->Rmask &&
srcfmt->Gmask == dstfmt->Gmask && srcfmt->Bmask == dstfmt->Bmask &&
srcfmt->Amask == dstfmt->Amask &&
info->src_blend != SDL_BLENDMODE_NONE) {
int incr = srcpxskip > 0 ? 1 : -1;
if (incr < 0) {
src += 3;
dst += 3;
}
while (height--) {
LOOP_UNROLLED4(
{
REPEAT_4({
tmp = ((*dst) && (*src))
? (((*dst) * (*src)) + 255) >> 8
: 0;
(*dst) = (tmp <= 255 ? tmp : 255);
src += incr;
dst += incr;
});
},
n, width);
src += srcskip;
dst += dstskip;
}
return;
}
if (srcbpp == 1) {
if (dstbpp == 1) {
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXELVALS_1(sR, sG, sB, sA, src, srcfmt);
GET_PIXELVALS_1(dR, dG, dB, dA, dst, dstfmt);
BLEND_RGBA_MULT(sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
else /* dstbpp > 1 */
{
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXELVALS_1(sR, sG, sB, sA, src, srcfmt);
GET_PIXEL(pixel, dstbpp, dst);
GET_PIXELVALS(dR, dG, dB, dA, pixel, dstfmt, dstppa);
BLEND_RGBA_MULT(sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
}
else /* srcbpp > 1 */
{
if (dstbpp == 1) {
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXEL(pixel, srcbpp, src);
GET_PIXELVALS(sR, sG, sB, sA, pixel, srcfmt, srcppa);
GET_PIXELVALS_1(dR, dG, dB, dA, dst, dstfmt);
BLEND_RGBA_MULT(sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
else /* dstbpp > 1 */
{
while (height--) {
LOOP_UNROLLED4(
{
GET_PIXEL(pixel, srcbpp, src);
GET_PIXELVALS(sR, sG, sB, sA, pixel, srcfmt, srcppa);
GET_PIXEL(pixel, dstbpp, dst);
GET_PIXELVALS(dR, dG, dB, dA, pixel, dstfmt, dstppa);
BLEND_RGBA_MULT(sR, sG, sB, sA, dR, dG, dB, dA);
CREATE_PIXEL(dst, dR, dG, dB, dA, dstbpp, dstfmt);
src += srcpxskip;
dst += dstpxskip;
},
n, width);
src += srcskip;
dst += dstskip;
}
}
}
}
static void
blit_blend_rgba_min(SDL_BlitInfo *info)
{
int n;
int width = info->width;
int height = info->height;
Uint8 *src = info->s_pixels;
int srcpxskip = info->s_pxskip;
int srcskip = info->s_skip;
Uint8 *dst = info->d_pixels;
int dstpxskip = info->d_pxskip;
int dstskip = info->d_skip;
SDL_PixelFormat *srcfmt = info->src;
SDL_PixelFormat *dstfmt = info->dst;
int srcbpp = PG_FORMAT_BytesPerPixel(srcfmt);
int dstbpp = PG_FORMAT_BytesPerPixel(dstfmt);
Uint8 dR, dG, dB, dA, sR, sG, sB, sA;
Uint32 pixel;
int srcppa = info->src_blend != SDL_BLENDMODE_NONE && srcfmt->Amask;
int dstppa = info->dst_blend != SDL_BLENDMODE_NONE && dstfmt->Amask;
if (!dstppa) {
blit_blend_min(info);
return;