Mercurial > sdl-ios-xcode
view src/video/SDL_blit_copy.c @ 3468:789b97008d8a
My first OpenGL shader! Momma will be so proud!
This shader implements the software renderer mask semantics where the source pixel is multiplied by the color and alpha modulation values and then any pixel with non-zero alpha is fully opaque.
The OpenGL renderer on Mac OS X now passes all the automated render tests! :)
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 21 Nov 2009 05:29:31 +0000 |
parents | 99210400e8b9 |
children | 72024425b437 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" #include "SDL_video.h" #include "SDL_blit.h" #include "SDL_blit_copy.h" #ifdef __SSE__ /* This assumes 16-byte aligned src and dst */ static __inline__ void SDL_memcpySSE(Uint8 * dst, const Uint8 * src, int len) { int i; __m128 values[4]; for (i = len / 64; i--;) { _mm_prefetch(src, _MM_HINT_NTA); values[0] = *(__m128 *) (src + 0); values[1] = *(__m128 *) (src + 16); values[2] = *(__m128 *) (src + 32); values[3] = *(__m128 *) (src + 48); _mm_stream_ps((float *) (dst + 0), values[0]); _mm_stream_ps((float *) (dst + 16), values[1]); _mm_stream_ps((float *) (dst + 32), values[2]); _mm_stream_ps((float *) (dst + 48), values[3]); src += 64; dst += 64; } if (len & 63) SDL_memcpy(dst, src, len & 63); } #endif /* __SSE__ */ #ifdef __MMX__ #ifdef _MSC_VER #pragma warning(disable:4799) #endif /* This assumes 8-byte aligned src and dst */ static __inline__ void SDL_memcpyMMX(Uint8 * dst, const Uint8 * src, int len) { int i; __m64 values[8]; for (i = len / 64; i--;) { _mm_prefetch(src, _MM_HINT_NTA); values[0] = *(__m64 *) (src + 0); values[1] = *(__m64 *) (src + 8); values[2] = *(__m64 *) (src + 16); values[3] = *(__m64 *) (src + 24); values[4] = *(__m64 *) (src + 32); values[5] = *(__m64 *) (src + 40); values[6] = *(__m64 *) (src + 48); values[7] = *(__m64 *) (src + 56); _mm_stream_pi((__m64 *) (dst + 0), values[0]); _mm_stream_pi((__m64 *) (dst + 8), values[1]); _mm_stream_pi((__m64 *) (dst + 16), values[2]); _mm_stream_pi((__m64 *) (dst + 24), values[3]); _mm_stream_pi((__m64 *) (dst + 32), values[4]); _mm_stream_pi((__m64 *) (dst + 40), values[5]); _mm_stream_pi((__m64 *) (dst + 48), values[6]); _mm_stream_pi((__m64 *) (dst + 56), values[7]); src += 64; dst += 64; } if (len & 63) SDL_memcpy(dst, src, len & 63); } #endif /* __MMX__ */ void SDL_BlitCopy(SDL_BlitInfo * info) { Uint8 *src, *dst; int w, h; int srcskip, dstskip; w = info->dst_w * info->dst_fmt->BytesPerPixel; h = info->dst_h; src = info->src; dst = info->dst; srcskip = info->src_pitch; dstskip = info->dst_pitch; #ifdef __SSE__ if (SDL_HasSSE() && !((uintptr_t) src & 15) && !(srcskip & 15) && !((uintptr_t) dst & 15) && !(dstskip & 15)) { while (h--) { SDL_memcpySSE(dst, src, w); src += srcskip; dst += dstskip; } return; } #endif #ifdef __MMX__ if (SDL_HasMMX() && !((uintptr_t) src & 7) && !(srcskip & 7) && !((uintptr_t) dst & 7) && !(dstskip & 7)) { while (h--) { SDL_memcpyMMX(dst, src, w); src += srcskip; dst += dstskip; } _mm_empty(); return; } #endif while (h--) { SDL_memcpy(dst, src, w); src += srcskip; dst += dstskip; } } void SDL_BlitCopyOverlap(SDL_BlitInfo * info) { Uint8 *src, *dst; int w, h; int skip; w = info->dst_w * info->dst_fmt->BytesPerPixel; h = info->dst_h; src = info->src; dst = info->dst; skip = info->src_pitch; if ((dst < src) || (dst >= (src + h * skip))) { SDL_BlitCopy(info); } else { src += ((h - 1) * skip); dst += ((h - 1) * skip); while (h--) { SDL_revcpy(dst, src, w); src -= skip; dst -= skip; } } } /* vi: set ts=4 sw=4 expandtab: */