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Diffstat (limited to 'distrib/sdl-1.2.12/src/video/SDL_blit.c')
-rw-r--r--distrib/sdl-1.2.12/src/video/SDL_blit.c360
1 files changed, 0 insertions, 360 deletions
diff --git a/distrib/sdl-1.2.12/src/video/SDL_blit.c b/distrib/sdl-1.2.12/src/video/SDL_blit.c
deleted file mode 100644
index fee4738..0000000
--- a/distrib/sdl-1.2.12/src/video/SDL_blit.c
+++ /dev/null
@@ -1,360 +0,0 @@
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 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_sysvideo.h"
-#include "SDL_blit.h"
-#include "SDL_RLEaccel_c.h"
-#include "SDL_pixels_c.h"
-
-#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && SDL_ASSEMBLY_ROUTINES
-#define MMX_ASMBLIT
-#if (__GNUC__ > 2) /* SSE instructions aren't in GCC 2. */
-#define SSE_ASMBLIT
-#endif
-#endif
-
-#if defined(MMX_ASMBLIT)
-#include "SDL_cpuinfo.h"
-#include "mmx.h"
-#endif
-
-/* The general purpose software blit routine */
-static int SDL_SoftBlit(SDL_Surface *src, SDL_Rect *srcrect,
- SDL_Surface *dst, SDL_Rect *dstrect)
-{
- int okay;
- int src_locked;
- int dst_locked;
-
- /* Everything is okay at the beginning... */
- okay = 1;
-
- /* Lock the destination if it's in hardware */
- dst_locked = 0;
- if ( SDL_MUSTLOCK(dst) ) {
- if ( SDL_LockSurface(dst) < 0 ) {
- okay = 0;
- } else {
- dst_locked = 1;
- }
- }
- /* Lock the source if it's in hardware */
- src_locked = 0;
- if ( SDL_MUSTLOCK(src) ) {
- if ( SDL_LockSurface(src) < 0 ) {
- okay = 0;
- } else {
- src_locked = 1;
- }
- }
-
- /* Set up source and destination buffer pointers, and BLIT! */
- if ( okay && srcrect->w && srcrect->h ) {
- SDL_BlitInfo info;
- SDL_loblit RunBlit;
-
- /* Set up the blit information */
- info.s_pixels = (Uint8 *)src->pixels +
- (Uint16)srcrect->y*src->pitch +
- (Uint16)srcrect->x*src->format->BytesPerPixel;
- info.s_width = srcrect->w;
- info.s_height = srcrect->h;
- info.s_skip=src->pitch-info.s_width*src->format->BytesPerPixel;
- info.d_pixels = (Uint8 *)dst->pixels +
- (Uint16)dstrect->y*dst->pitch +
- (Uint16)dstrect->x*dst->format->BytesPerPixel;
- info.d_width = dstrect->w;
- info.d_height = dstrect->h;
- info.d_skip=dst->pitch-info.d_width*dst->format->BytesPerPixel;
- info.aux_data = src->map->sw_data->aux_data;
- info.src = src->format;
- info.table = src->map->table;
- info.dst = dst->format;
- RunBlit = src->map->sw_data->blit;
-
- /* Run the actual software blit */
- RunBlit(&info);
- }
-
- /* We need to unlock the surfaces if they're locked */
- if ( dst_locked ) {
- SDL_UnlockSurface(dst);
- }
- if ( src_locked ) {
- SDL_UnlockSurface(src);
- }
- /* Blit is done! */
- return(okay ? 0 : -1);
-}
-
-#ifdef MMX_ASMBLIT
-static __inline__ void SDL_memcpyMMX(Uint8 *to, const Uint8 *from, int len)
-{
- int i;
-
- for(i=0; i<len/8; i++) {
- __asm__ __volatile__ (
- " movq (%0), %%mm0\n"
- " movq %%mm0, (%1)\n"
- : : "r" (from), "r" (to) : "memory");
- from+=8;
- to+=8;
- }
- if (len&7)
- SDL_memcpy(to, from, len&7);
-}
-
-#ifdef SSE_ASMBLIT
-static __inline__ void SDL_memcpySSE(Uint8 *to, const Uint8 *from, int len)
-{
- int i;
-
- __asm__ __volatile__ (
- " prefetchnta (%0)\n"
- " prefetchnta 64(%0)\n"
- " prefetchnta 128(%0)\n"
- " prefetchnta 192(%0)\n"
- : : "r" (from) );
-
- for(i=0; i<len/8; i++) {
- __asm__ __volatile__ (
- " prefetchnta 256(%0)\n"
- " movq (%0), %%mm0\n"
- " movntq %%mm0, (%1)\n"
- : : "r" (from), "r" (to) : "memory");
- from+=8;
- to+=8;
- }
- if (len&7)
- SDL_memcpy(to, from, len&7);
-}
-#endif
-#endif
-
-static void SDL_BlitCopy(SDL_BlitInfo *info)
-{
- Uint8 *src, *dst;
- int w, h;
- int srcskip, dstskip;
-
- w = info->d_width*info->dst->BytesPerPixel;
- h = info->d_height;
- src = info->s_pixels;
- dst = info->d_pixels;
- srcskip = w+info->s_skip;
- dstskip = w+info->d_skip;
-
-#ifdef SSE_ASMBLIT
- if(SDL_HasSSE())
- {
- while ( h-- ) {
- SDL_memcpySSE(dst, src, w);
- src += srcskip;
- dst += dstskip;
- }
- __asm__ __volatile__ (
- " emms\n"
- ::);
- }
- else
-#endif
-#ifdef MMX_ASMBLIT
- if(SDL_HasMMX())
- {
- while ( h-- ) {
- SDL_memcpyMMX(dst, src, w);
- src += srcskip;
- dst += dstskip;
- }
- __asm__ __volatile__ (
- " emms\n"
- ::);
- }
- else
-#endif
- while ( h-- ) {
- SDL_memcpy(dst, src, w);
- src += srcskip;
- dst += dstskip;
- }
-}
-
-static void SDL_BlitCopyOverlap(SDL_BlitInfo *info)
-{
- Uint8 *src, *dst;
- int w, h;
- int srcskip, dstskip;
-
- w = info->d_width*info->dst->BytesPerPixel;
- h = info->d_height;
- src = info->s_pixels;
- dst = info->d_pixels;
- srcskip = w+info->s_skip;
- dstskip = w+info->d_skip;
- if ( dst < src ) {
- while ( h-- ) {
- SDL_memcpy(dst, src, w);
- src += srcskip;
- dst += dstskip;
- }
- } else {
- src += ((h-1) * srcskip);
- dst += ((h-1) * dstskip);
- while ( h-- ) {
- SDL_revcpy(dst, src, w);
- src -= srcskip;
- dst -= dstskip;
- }
- }
-}
-
-/* Figure out which of many blit routines to set up on a surface */
-int SDL_CalculateBlit(SDL_Surface *surface)
-{
- int blit_index;
-
- /* Clean everything out to start */
- if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
- SDL_UnRLESurface(surface, 1);
- }
- surface->map->sw_blit = NULL;
-
- /* Figure out if an accelerated hardware blit is possible */
- surface->flags &= ~SDL_HWACCEL;
- if ( surface->map->identity ) {
- int hw_blit_ok;
-
- if ( (surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
- /* We only support accelerated blitting to hardware */
- if ( surface->map->dst->flags & SDL_HWSURFACE ) {
- hw_blit_ok = current_video->info.blit_hw;
- } else {
- hw_blit_ok = 0;
- }
- if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) {
- hw_blit_ok = current_video->info.blit_hw_CC;
- }
- if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) {
- hw_blit_ok = current_video->info.blit_hw_A;
- }
- } else {
- /* We only support accelerated blitting to hardware */
- if ( surface->map->dst->flags & SDL_HWSURFACE ) {
- hw_blit_ok = current_video->info.blit_sw;
- } else {
- hw_blit_ok = 0;
- }
- if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) {
- hw_blit_ok = current_video->info.blit_sw_CC;
- }
- if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) {
- hw_blit_ok = current_video->info.blit_sw_A;
- }
- }
- if ( hw_blit_ok ) {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- video->CheckHWBlit(this, surface, surface->map->dst);
- }
- }
-
- /* if an alpha pixel format is specified, we can accelerate alpha blits */
- if (((surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE )&&(current_video->displayformatalphapixel))
- {
- if ( (surface->flags & SDL_SRCALPHA) )
- if ( current_video->info.blit_hw_A ) {
- SDL_VideoDevice *video = current_video;
- SDL_VideoDevice *this = current_video;
- video->CheckHWBlit(this, surface, surface->map->dst);
- }
- }
-
- /* Get the blit function index, based on surface mode */
- /* { 0 = nothing, 1 = colorkey, 2 = alpha, 3 = colorkey+alpha } */
- blit_index = 0;
- blit_index |= (!!(surface->flags & SDL_SRCCOLORKEY)) << 0;
- if ( surface->flags & SDL_SRCALPHA
- && (surface->format->alpha != SDL_ALPHA_OPAQUE
- || surface->format->Amask) ) {
- blit_index |= 2;
- }
-
- /* Check for special "identity" case -- copy blit */
- if ( surface->map->identity && blit_index == 0 ) {
- surface->map->sw_data->blit = SDL_BlitCopy;
-
- /* Handle overlapping blits on the same surface */
- if ( surface == surface->map->dst ) {
- surface->map->sw_data->blit = SDL_BlitCopyOverlap;
- }
- } else {
- if ( surface->format->BitsPerPixel < 8 ) {
- surface->map->sw_data->blit =
- SDL_CalculateBlit0(surface, blit_index);
- } else {
- switch ( surface->format->BytesPerPixel ) {
- case 1:
- surface->map->sw_data->blit =
- SDL_CalculateBlit1(surface, blit_index);
- break;
- case 2:
- case 3:
- case 4:
- surface->map->sw_data->blit =
- SDL_CalculateBlitN(surface, blit_index);
- break;
- default:
- surface->map->sw_data->blit = NULL;
- break;
- }
- }
- }
- /* Make sure we have a blit function */
- if ( surface->map->sw_data->blit == NULL ) {
- SDL_InvalidateMap(surface->map);
- SDL_SetError("Blit combination not supported");
- return(-1);
- }
-
- /* Choose software blitting function */
- if(surface->flags & SDL_RLEACCELOK
- && (surface->flags & SDL_HWACCEL) != SDL_HWACCEL) {
-
- if(surface->map->identity
- && (blit_index == 1
- || (blit_index == 3 && !surface->format->Amask))) {
- if ( SDL_RLESurface(surface) == 0 )
- surface->map->sw_blit = SDL_RLEBlit;
- } else if(blit_index == 2 && surface->format->Amask) {
- if ( SDL_RLESurface(surface) == 0 )
- surface->map->sw_blit = SDL_RLEAlphaBlit;
- }
- }
-
- if ( surface->map->sw_blit == NULL ) {
- surface->map->sw_blit = SDL_SoftBlit;
- }
- return(0);
-}
-
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