diff options
Diffstat (limited to '3rdparty/SDL2/src/video/SDL_blit_A.c')
-rw-r--r-- | 3rdparty/SDL2/src/video/SDL_blit_A.c | 1388 |
1 files changed, 0 insertions, 1388 deletions
diff --git a/3rdparty/SDL2/src/video/SDL_blit_A.c b/3rdparty/SDL2/src/video/SDL_blit_A.c deleted file mode 100644 index 0190ffddda7..00000000000 --- a/3rdparty/SDL2/src/video/SDL_blit_A.c +++ /dev/null @@ -1,1388 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> - - 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" - -#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--) { - /* *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* */ - 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--) { - /* *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* */ - 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--) { - /* *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 ) { - *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* */ - 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; - multmask <<= (ashift * 2); - multmask2 = 0x00FF00FF00FF00FFULL; - - while (height--) { - /* *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* */ - srcp += srcskip; - dstp += dstskip; - } - _mm_empty(); -} - -#endif /* __MMX__ */ - -/* 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--) { - /* *INDENT-OFF* */ - DUFFS_LOOP4({ - Uint32 s = *srcp++; - Uint32 d = *dstp; - *dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) - + (s & d & 0x00010101)) | 0xff000000; - }, width); - /* *INDENT-ON* */ - 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--) { - /* *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* */ - 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--) { - /* *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* */ - 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--) { - /* *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* */ - 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% */ -#define BLEND16_50(d, s, mask) \ - ((((s & mask) + (d & mask)) >> 1) + (s & d & (~mask & 0xffff))) - -/* blend two 16 bit pixels at 50% */ -#define BLEND2x16_50(d, s, mask) \ - (((s & (mask | mask << 16)) >> 1) + ((d & (mask | mask << 16)) >> 1) \ - + (s & d & (~(mask | mask << 16)))) - -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--) { - /* *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* */ - 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--) { - /* *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* */ - 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--) { - /* *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* */ - 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--) { - /* *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* */ - 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--) { - /* *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* */ - 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--) { - /* *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* */ - 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--) { - /* *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* */ - 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--) { - /* *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* */ - 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--) { - /* *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* */ - 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: - return BlitNto1PixelAlpha; - - case 2: - 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) { - return BlitRGBtoRGBPixelAlpha; - } - } - return BlitNtoNPixelAlpha; - - case 3: - default: - return BlitNtoNPixelAlpha; - } - break; - - case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: - if (sf->Amask == 0) { - /* Per-surface alpha blits */ - switch (df->BytesPerPixel) { - case 1: - return BlitNto1SurfaceAlpha; - - 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) { - return BlitNto1SurfaceAlphaKey; - } else { - return BlitNtoNSurfaceAlphaKey; - } - } - break; - } - - return NULL; -} - -/* vi: set ts=4 sw=4 expandtab: */ |