sdl-ios-xcode: src/video/SDL_blit

annotate src/video/SDL_blit_copy.c @ 2247:93994f65c74c

Removed hermes since it's LGPL and not compatible with a commercial license. Prepping for using MMX and SSE intrinsics instead of inline assembly. .. except for memcpy equivalents which only get faster if they can exploit the parallelism of loading into multiple SIMD registers. :)

author	Sam Lantinga <slouken@libsdl.org>
date	Wed, 15 Aug 2007 08:21:10 +0000
parents
children	5cd2a2293cf0

rev	line source
2247 93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	1 /*
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	2 SDL - Simple DirectMedia Layer
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	3 Copyright (C) 1997-2006 Sam Lantinga
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	4
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	5 This library is free software; you can redistribute it and/or
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	6 modify it under the terms of the GNU Lesser General Public
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	7 License as published by the Free Software Foundation; either
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	8 version 2.1 of the License, or (at your option) any later version.
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	9
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	10 This library is distributed in the hope that it will be useful,
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	13 Lesser General Public License for more details.
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	14
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	15 You should have received a copy of the GNU Lesser General Public
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	16 License along with this library; if not, write to the Free Software
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	18
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	19 Sam Lantinga
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	20 slouken@libsdl.org
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	21 */
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	22 #include "SDL_config.h"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	23
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	24 #include "SDL_video.h"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	25 #include "SDL_blit.h"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	26
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	27 /* The MMX/SSE intrinsics don't give access to specific registers for
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	28 the most memory parallelism, so we'll use GCC inline assembly here...
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	29 */
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	30 #ifndef __GNUC__
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	31 #undef __MMX__
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	32 #undef __SSE__
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	33 #endif
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	34
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	35 #ifdef __MMX__
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	36 static __inline__ void
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	37 SDL_memcpyMMX(Uint8 dst, const Uint8 src, int len)
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	38 {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	39 int i;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	40
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	41 for (i = len / 64; i--;) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	42 __asm__ __volatile__ (
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	43 "prefetchnta (%0)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	44 "movq (%0), %%mm0\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	45 "movq 8(%0), %%mm1\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	46 "movq 16(%0), %%mm2\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	47 "movq 24(%0), %%mm3\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	48 "movq 32(%0), %%mm4\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	49 "movq 40(%0), %%mm5\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	50 "movq 48(%0), %%mm6\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	51 "movq 56(%0), %%mm7\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	52 "movntq %%mm0, (%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	53 "movntq %%mm1, 8(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	54 "movntq %%mm2, 16(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	55 "movntq %%mm3, 24(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	56 "movntq %%mm4, 32(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	57 "movntq %%mm5, 40(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	58 "movntq %%mm6, 48(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	59 "movntq %%mm7, 56(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	60 :: "r" (src), "r" (dst) : "memory");
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	61 src += 64;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	62 dst += 64;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	63 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	64 if (len & 63)
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	65 SDL_memcpy(dst, src, len & 63);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	66 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	67 #endif /* __MMX__ */
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	68
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	69 #ifdef __SSE__
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	70 static __inline__ void
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	71 SDL_memcpySSE(Uint8 dst, const Uint8 src, int len)
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	72 {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	73 int i;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	74
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	75 for (i = len / 64; i--;) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	76 __asm__ __volatile__ (
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	77 "prefetchnta (%0)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	78 "movaps (%0), %%xmm0\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	79 "movaps 16(%0), %%xmm1\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	80 "movaps 32(%0), %%xmm2\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	81 "movaps 48(%0), %%xmm3\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	82 "movntps %%xmm0, (%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	83 "movntps %%xmm1, 16(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	84 "movntps %%xmm2, 32(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	85 "movntps %%xmm3, 48(%1)\n"
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	86 :: "r" (src), "r" (dst) : "memory");
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	87 src += 64;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	88 dst += 64;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	89 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	90 if (len & 63)
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	91 SDL_memcpy(dst, src, len & 63);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	92 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	93 #endif /* __SSE__ */
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	94
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	95 void
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	96 SDL_BlitCopy(SDL_BlitInfo * info)
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	97 {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	98 Uint8 src, dst;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	99 int w, h;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	100 int srcskip, dstskip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	101
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	102 w = info->d_width * info->dst->BytesPerPixel;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	103 h = info->d_height;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	104 src = info->s_pixels;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	105 dst = info->d_pixels;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	106 srcskip = w + info->s_skip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	107 dstskip = w + info->d_skip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	108
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	109 #ifdef __SSE__
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	110 if (SDL_HasSSE() && !((uintptr_t)src & 15) && !((uintptr_t)dst & 15)) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	111 while (h--) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	112 SDL_memcpySSE(dst, src, w);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	113 src += srcskip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	114 dst += dstskip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	115 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	116 return;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	117 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	118 #endif
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	119
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	120 #ifdef __MMX__
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	121 if (SDL_HasMMX() && !((uintptr_t)src & 7) && !((uintptr_t)dst & 7)) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	122 while (h--) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	123 SDL_memcpyMMX(dst, src, w);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	124 src += srcskip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	125 dst += dstskip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	126 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	127 __asm__ __volatile__(" emms\n"::);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	128 return;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	129 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	130 #endif
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	131
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	132 while (h--) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	133 SDL_memcpy(dst, src, w);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	134 src += srcskip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	135 dst += dstskip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	136 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	137 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	138
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	139 void
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	140 SDL_BlitCopyOverlap(SDL_BlitInfo * info)
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	141 {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	142 Uint8 src, dst;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	143 int w, h;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	144 int skip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	145
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	146 w = info->d_width * info->dst->BytesPerPixel;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	147 h = info->d_height;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	148 src = info->s_pixels;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	149 dst = info->d_pixels;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	150 skip = w + info->s_skip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	151 if ((dst < src) \|\| (dst >= (src + h*skip))) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	152 SDL_BlitCopy(info);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	153 } else {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	154 src += ((h - 1) * skip);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	155 dst += ((h - 1) * skip);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	156 while (h--) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	157 SDL_revcpy(dst, src, w);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	158 src -= skip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	159 dst -= skip;
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	160 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	161 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	162 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	163
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license. Sam Lantinga <slouken@libsdl.org> parents: diff changeset	164 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/video/SDL_blit_copy.c @ 2247:93994f65c74c