ryujinx/SDL
1
0
Fork 0
mirror of https://github.com/Ryujinx/SDL.git synced 2024-12-27 20:35:36 +00:00
Code Issues Packages Projects Releases Wiki Activity
SDL/src/video/SDL_blit_A.c

1497 lines
50 KiB
C
Raw Normal View History

Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
/*
Simple DirectMedia Layer
Updated copyright date for 2020
2020-01-17 04:49:25 +00:00
Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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"
Added a single SDL_LEAN_AND_MEAN define to turn on minimal SDL builds Protected more code with #ifdefs to reduce the size of minimal shared library builds
2020-01-23 09:00:52 +00:00
#if SDL_HAVE_BLIT_A
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
#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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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 ) {
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
*dst =((dR>>5)<<(3+2))|((dG>>5)<<(2))|((dB>>6)<<(0));
Fixed whitespace
2018-09-24 18:49:25 +00:00
} else {
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
*dst = palmap[((dR>>5)<<(3+2))|((dG>>5)<<(2))|((dB>>6)<<(0))];
Fixed whitespace
2018-09-24 18:49:25 +00:00
}
}
dst++;
src += srcbpp;
},
width);
/* *INDENT-ON* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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;
Fixed whitespace
2018-09-24 18:49:25 +00:00
multmask <<= (ashift * 2);
multmask2 = 0x00FF00FF00FF00FFULL;
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
while (height--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
}
#endif /* __MMX__ */
ARM: SIMD assembly optimization for function BlitRGBtoRGBPixelAlpha Much of the heavy lifting of this optimization is lifted from the Pixman project, which is distributed under an MIT-style license. As far as possible, these elements have been relicensed to the zlib license.
2019-10-25 01:13:05 +00:00
#if SDL_ARM_SIMD_BLITTERS
ARM: SIMD assembly optimization for function BlitARGBto565PixelAlpha
2019-10-25 01:13:56 +00:00
void BlitARGBto565PixelAlphaARMSIMDAsm(int32_t w, int32_t h, uint16_t *dst, int32_t dst_stride, uint32_t *src, int32_t src_stride);
static void
BlitARGBto565PixelAlphaARMSIMD(SDL_BlitInfo * info)
{
int32_t width = info->dst_w;
int32_t height = info->dst_h;
uint16_t *dstp = (uint16_t *)info->dst;
int32_t dststride = width + (info->dst_skip >> 1);
uint32_t *srcp = (uint32_t *)info->src;
int32_t srcstride = width + (info->src_skip >> 2);
BlitARGBto565PixelAlphaARMSIMDAsm(width, height, dstp, dststride, srcp, srcstride);
}
ARM: SIMD assembly optimization for function BlitRGBtoRGBPixelAlpha Much of the heavy lifting of this optimization is lifted from the Pixman project, which is distributed under an MIT-style license. As far as possible, these elements have been relicensed to the zlib license.
2019-10-25 01:13:05 +00:00
void BlitRGBtoRGBPixelAlphaARMSIMDAsm(int32_t w, int32_t h, uint32_t *dst, int32_t dst_stride, uint32_t *src, int32_t src_stride);
static void
BlitRGBtoRGBPixelAlphaARMSIMD(SDL_BlitInfo * info)
{
int32_t width = info->dst_w;
int32_t height = info->dst_h;
uint32_t *dstp = (uint32_t *)info->dst;
int32_t dststride = width + (info->dst_skip >> 2);
uint32_t *srcp = (uint32_t *)info->src;
int32_t srcstride = width + (info->src_skip >> 2);
BlitRGBtoRGBPixelAlphaARMSIMDAsm(width, height, dstp, dststride, srcp, srcstride);
}
#endif
ARM: NEON assembly optimization for function BlitRGBtoRGBPixelAlpha
2019-10-25 01:17:19 +00:00
#if SDL_ARM_NEON_BLITTERS
ARM: NEON assembly optimization for function BlitARGBto565PixelAlpha
2019-10-25 01:17:38 +00:00
void BlitARGBto565PixelAlphaARMNEONAsm(int32_t w, int32_t h, uint16_t *dst, int32_t dst_stride, uint32_t *src, int32_t src_stride);
static void
BlitARGBto565PixelAlphaARMNEON(SDL_BlitInfo * info)
{
int32_t width = info->dst_w;
int32_t height = info->dst_h;
uint16_t *dstp = (uint16_t *)info->dst;
int32_t dststride = width + (info->dst_skip >> 1);
uint32_t *srcp = (uint32_t *)info->src;
int32_t srcstride = width + (info->src_skip >> 2);
BlitARGBto565PixelAlphaARMNEONAsm(width, height, dstp, dststride, srcp, srcstride);
}
ARM: NEON assembly optimization for function BlitRGBtoRGBPixelAlpha
2019-10-25 01:17:19 +00:00
void BlitRGBtoRGBPixelAlphaARMNEONAsm(int32_t w, int32_t h, uint32_t *dst, int32_t dst_stride, uint32_t *src, int32_t src_stride);
static void
BlitRGBtoRGBPixelAlphaARMNEON(SDL_BlitInfo * info)
{
int32_t width = info->dst_w;
int32_t height = info->dst_h;
uint32_t *dstp = (uint32_t *)info->dst;
int32_t dststride = width + (info->dst_skip >> 2);
uint32_t *srcp = (uint32_t *)info->src;
int32_t srcstride = width + (info->src_skip >> 2);
BlitRGBtoRGBPixelAlphaARMNEONAsm(width, height, dstp, dststride, srcp, srcstride);
}
#endif
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
/* 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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *INDENT-OFF* */
DUFFS_LOOP4({
Uint32 s = *srcp++;
Uint32 d = *dstp;
*dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1)
+ (s & d & 0x00010101)) | 0xff000000;
}, width);
/* *INDENT-ON* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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% */
Fixed whitespace
2018-09-24 18:49:25 +00:00
#define BLEND16_50(d, s, mask) \
((((s & mask) + (d & mask)) >> 1) + (s & d & (~mask & 0xffff)))
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
/* blend two 16 bit pixels at 50% */
Fixed whitespace
2018-09-24 18:49:25 +00:00
#define BLEND2x16_50(d, s, mask) \
(((s & (mask | mask << 16)) >> 1) + ((d & (mask | mask << 16)) >> 1) \
+ (s & d & (~(mask | mask << 16))))
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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--) {
Fixed whitespace
2018-09-24 18:49:25 +00:00
/* *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* */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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:
Fix blit with blending (Blit_A) to RGB332 which has no palette
2019-01-30 16:16:08 +00:00
if (df->palette != NULL) {
return BlitNto1PixelAlpha;
} else {
/* RGB332 has no palette ! */
return BlitNtoNPixelAlpha;
}
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
case 2:
ARM: NEON assembly optimization for function BlitARGBto565PixelAlpha
2019-10-25 01:17:38 +00:00
#if SDL_ARM_NEON_BLITTERS || SDL_ARM_SIMD_BLITTERS
ARM: SIMD assembly optimization for function BlitARGBto565PixelAlpha
2019-10-25 01:13:56 +00:00
if (sf->BytesPerPixel == 4 && sf->Amask == 0xff000000
&& sf->Gmask == 0xff00 && df->Gmask == 0x7e0
&& ((sf->Rmask == 0xff && df->Rmask == 0x1f)
ARM: NEON assembly optimization for function BlitARGBto565PixelAlpha
2019-10-25 01:17:38 +00:00
|| (sf->Bmask == 0xff && df->Bmask == 0x1f)))
{
#if SDL_ARM_NEON_BLITTERS
if (SDL_HasNEON())
return BlitARGBto565PixelAlphaARMNEON;
#endif
#if SDL_ARM_SIMD_BLITTERS
if (SDL_HasARMSIMD())
ARM: SIMD assembly optimization for function BlitARGBto565PixelAlpha
2019-10-25 01:13:56 +00:00
return BlitARGBto565PixelAlphaARMSIMD;
ARM: NEON assembly optimization for function BlitARGBto565PixelAlpha
2019-10-25 01:17:38 +00:00
#endif
}
ARM: SIMD assembly optimization for function BlitARGBto565PixelAlpha
2019-10-25 01:13:56 +00:00
#endif
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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) {
ARM: NEON assembly optimization for function BlitRGBtoRGBPixelAlpha
2019-10-25 01:17:19 +00:00
#if SDL_ARM_NEON_BLITTERS
if (SDL_HasNEON())
return BlitRGBtoRGBPixelAlphaARMNEON;
#endif
ARM: SIMD assembly optimization for function BlitRGBtoRGBPixelAlpha Much of the heavy lifting of this optimization is lifted from the Pixman project, which is distributed under an MIT-style license. As far as possible, these elements have been relicensed to the zlib license.
2019-10-25 01:13:05 +00:00
#if SDL_ARM_SIMD_BLITTERS
if (SDL_HasARMSIMD())
return BlitRGBtoRGBPixelAlphaARMSIMD;
#endif
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
return BlitRGBtoRGBPixelAlpha;
}
}
return BlitNtoNPixelAlpha;
case 3:
default:
Fix some more compiler warnings on armcc.
2017-03-03 21:38:17 +00:00
break;
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
}
Fix some more compiler warnings on armcc.
2017-03-03 21:38:17 +00:00
return BlitNtoNPixelAlpha;
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
if (sf->Amask == 0) {
/* Per-surface alpha blits */
switch (df->BytesPerPixel) {
case 1:
Fix blit with blending (Blit_A) to RGB332 which has no palette
2019-01-30 16:16:08 +00:00
if (df->palette != NULL) {
return BlitNto1SurfaceAlpha;
} else {
/* RGB332 has no palette ! */
return BlitNtoNSurfaceAlpha;
}
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
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) {
Fix blit with blending (Blit_A) to RGB332 which has no palette
2019-01-30 16:16:08 +00:00
if (df->palette != NULL) {
return BlitNto1SurfaceAlphaKey;
} else {
/* RGB332 has no palette ! */
return BlitNtoNSurfaceAlphaKey;
}
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
} else {
return BlitNtoNSurfaceAlphaKey;
}
}
break;
}
return NULL;
}
Added a single SDL_LEAN_AND_MEAN define to turn on minimal SDL builds Protected more code with #ifdefs to reduce the size of minimal shared library builds
2020-01-23 09:00:52 +00:00
#endif /* SDL_HAVE_BLIT_A */
Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
2015-06-21 15:33:46 +00:00
/* vi: set ts=4 sw=4 expandtab: */
Reference in a new issue Copy permalink