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Diffstat (limited to 'distrib/sdl-1.2.12/src/video/SDL_blit_1.c')
-rw-r--r--distrib/sdl-1.2.12/src/video/SDL_blit_1.c523
1 files changed, 0 insertions, 523 deletions
diff --git a/distrib/sdl-1.2.12/src/video/SDL_blit_1.c b/distrib/sdl-1.2.12/src/video/SDL_blit_1.c
deleted file mode 100644
index d31126b..0000000
--- a/distrib/sdl-1.2.12/src/video/SDL_blit_1.c
+++ /dev/null
@@ -1,523 +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_blit.h"
-#include "SDL_sysvideo.h"
-#include "SDL_endian.h"
-
-/* Functions to blit from 8-bit surfaces to other surfaces */
-
-static void Blit1to1(SDL_BlitInfo *info)
-{
-#ifndef USE_DUFFS_LOOP
- int c;
-#endif
- int width, height;
- Uint8 *src, *map, *dst;
- int srcskip, dstskip;
-
- /* Set up some basic variables */
- width = info->d_width;
- height = info->d_height;
- src = info->s_pixels;
- srcskip = info->s_skip;
- dst = info->d_pixels;
- dstskip = info->d_skip;
- map = info->table;
-
- while ( height-- ) {
-#ifdef USE_DUFFS_LOOP
- DUFFS_LOOP(
- {
- *dst = map[*src];
- }
- dst++;
- src++;
- , width);
-#else
- for ( c=width; c; --c ) {
- *dst = map[*src];
- dst++;
- src++;
- }
-#endif
- src += srcskip;
- dst += dstskip;
- }
-}
-/* This is now endian dependent */
-#if ( SDL_BYTEORDER == SDL_LIL_ENDIAN )
-#define HI 1
-#define LO 0
-#else /* ( SDL_BYTEORDER == SDL_BIG_ENDIAN ) */
-#define HI 0
-#define LO 1
-#endif
-static void Blit1to2(SDL_BlitInfo *info)
-{
-#ifndef USE_DUFFS_LOOP
- int c;
-#endif
- int width, height;
- Uint8 *src, *dst;
- Uint16 *map;
- int srcskip, dstskip;
-
- /* Set up some basic variables */
- width = info->d_width;
- height = info->d_height;
- src = info->s_pixels;
- srcskip = info->s_skip;
- dst = info->d_pixels;
- dstskip = info->d_skip;
- map = (Uint16 *)info->table;
-
-#ifdef USE_DUFFS_LOOP
- while ( height-- ) {
- DUFFS_LOOP(
- {
- *(Uint16 *)dst = map[*src++];
- dst += 2;
- },
- width);
- src += srcskip;
- dst += dstskip;
- }
-#else
- /* Memory align at 4-byte boundary, if necessary */
- if ( (long)dst & 0x03 ) {
- /* Don't do anything if width is 0 */
- if ( width == 0 ) {
- return;
- }
- --width;
-
- while ( height-- ) {
- /* Perform copy alignment */
- *(Uint16 *)dst = map[*src++];
- dst += 2;
-
- /* Copy in 4 pixel chunks */
- for ( c=width/4; c; --c ) {
- *(Uint32 *)dst =
- (map[src[HI]]<<16)|(map[src[LO]]);
- src += 2;
- dst += 4;
- *(Uint32 *)dst =
- (map[src[HI]]<<16)|(map[src[LO]]);
- src += 2;
- dst += 4;
- }
- /* Get any leftovers */
- switch (width & 3) {
- case 3:
- *(Uint16 *)dst = map[*src++];
- dst += 2;
- case 2:
- *(Uint32 *)dst =
- (map[src[HI]]<<16)|(map[src[LO]]);
- src += 2;
- dst += 4;
- break;
- case 1:
- *(Uint16 *)dst = map[*src++];
- dst += 2;
- break;
- }
- src += srcskip;
- dst += dstskip;
- }
- } else {
- while ( height-- ) {
- /* Copy in 4 pixel chunks */
- for ( c=width/4; c; --c ) {
- *(Uint32 *)dst =
- (map[src[HI]]<<16)|(map[src[LO]]);
- src += 2;
- dst += 4;
- *(Uint32 *)dst =
- (map[src[HI]]<<16)|(map[src[LO]]);
- src += 2;
- dst += 4;
- }
- /* Get any leftovers */
- switch (width & 3) {
- case 3:
- *(Uint16 *)dst = map[*src++];
- dst += 2;
- case 2:
- *(Uint32 *)dst =
- (map[src[HI]]<<16)|(map[src[LO]]);
- src += 2;
- dst += 4;
- break;
- case 1:
- *(Uint16 *)dst = map[*src++];
- dst += 2;
- break;
- }
- src += srcskip;
- dst += dstskip;
- }
- }
-#endif /* USE_DUFFS_LOOP */
-}
-static void Blit1to3(SDL_BlitInfo *info)
-{
-#ifndef USE_DUFFS_LOOP
- int c;
-#endif
- int o;
- int width, height;
- Uint8 *src, *map, *dst;
- int srcskip, dstskip;
-
- /* Set up some basic variables */
- width = info->d_width;
- height = info->d_height;
- src = info->s_pixels;
- srcskip = info->s_skip;
- dst = info->d_pixels;
- dstskip = info->d_skip;
- map = info->table;
-
- while ( height-- ) {
-#ifdef USE_DUFFS_LOOP
- DUFFS_LOOP(
- {
- o = *src * 4;
- dst[0] = map[o++];
- dst[1] = map[o++];
- dst[2] = map[o++];
- }
- src++;
- dst += 3;
- , width);
-#else
- for ( c=width; c; --c ) {
- o = *src * 4;
- dst[0] = map[o++];
- dst[1] = map[o++];
- dst[2] = map[o++];
- src++;
- dst += 3;
- }
-#endif /* USE_DUFFS_LOOP */
- src += srcskip;
- dst += dstskip;
- }
-}
-static void Blit1to4(SDL_BlitInfo *info)
-{
-#ifndef USE_DUFFS_LOOP
- int c;
-#endif
- int width, height;
- Uint8 *src;
- Uint32 *map, *dst;
- int srcskip, dstskip;
-
- /* Set up some basic variables */
- width = info->d_width;
- height = info->d_height;
- src = info->s_pixels;
- srcskip = info->s_skip;
- dst = (Uint32 *)info->d_pixels;
- dstskip = info->d_skip/4;
- map = (Uint32 *)info->table;
-
- while ( height-- ) {
-#ifdef USE_DUFFS_LOOP
- DUFFS_LOOP(
- *dst++ = map[*src++];
- , width);
-#else
- for ( c=width/4; c; --c ) {
- *dst++ = map[*src++];
- *dst++ = map[*src++];
- *dst++ = map[*src++];
- *dst++ = map[*src++];
- }
- switch ( width & 3 ) {
- case 3:
- *dst++ = map[*src++];
- case 2:
- *dst++ = map[*src++];
- case 1:
- *dst++ = map[*src++];
- }
-#endif /* USE_DUFFS_LOOP */
- src += srcskip;
- dst += dstskip;
- }
-}
-
-static void Blit1to1Key(SDL_BlitInfo *info)
-{
- int width = info->d_width;
- int height = info->d_height;
- Uint8 *src = info->s_pixels;
- int srcskip = info->s_skip;
- Uint8 *dst = info->d_pixels;
- int dstskip = info->d_skip;
- Uint8 *palmap = info->table;
- Uint32 ckey = info->src->colorkey;
-
- if ( palmap ) {
- while ( height-- ) {
- DUFFS_LOOP(
- {
- if ( *src != ckey ) {
- *dst = palmap[*src];
- }
- dst++;
- src++;
- },
- width);
- src += srcskip;
- dst += dstskip;
- }
- } else {
- while ( height-- ) {
- DUFFS_LOOP(
- {
- if ( *src != ckey ) {
- *dst = *src;
- }
- dst++;
- src++;
- },
- width);
- src += srcskip;
- dst += dstskip;
- }
- }
-}
-
-static void Blit1to2Key(SDL_BlitInfo *info)
-{
- int width = info->d_width;
- int height = info->d_height;
- Uint8 *src = info->s_pixels;
- int srcskip = info->s_skip;
- Uint16 *dstp = (Uint16 *)info->d_pixels;
- int dstskip = info->d_skip;
- Uint16 *palmap = (Uint16 *)info->table;
- Uint32 ckey = info->src->colorkey;
-
- /* Set up some basic variables */
- dstskip /= 2;
-
- while ( height-- ) {
- DUFFS_LOOP(
- {
- if ( *src != ckey ) {
- *dstp=palmap[*src];
- }
- src++;
- dstp++;
- },
- width);
- src += srcskip;
- dstp += dstskip;
- }
-}
-
-static void Blit1to3Key(SDL_BlitInfo *info)
-{
- int width = info->d_width;
- int height = info->d_height;
- Uint8 *src = info->s_pixels;
- int srcskip = info->s_skip;
- Uint8 *dst = info->d_pixels;
- int dstskip = info->d_skip;
- Uint8 *palmap = info->table;
- Uint32 ckey = info->src->colorkey;
- int o;
-
- while ( height-- ) {
- DUFFS_LOOP(
- {
- if ( *src != ckey ) {
- o = *src * 4;
- dst[0] = palmap[o++];
- dst[1] = palmap[o++];
- dst[2] = palmap[o++];
- }
- src++;
- dst += 3;
- },
- width);
- src += srcskip;
- dst += dstskip;
- }
-}
-
-static void Blit1to4Key(SDL_BlitInfo *info)
-{
- int width = info->d_width;
- int height = info->d_height;
- Uint8 *src = info->s_pixels;
- int srcskip = info->s_skip;
- Uint32 *dstp = (Uint32 *)info->d_pixels;
- int dstskip = info->d_skip;
- Uint32 *palmap = (Uint32 *)info->table;
- Uint32 ckey = info->src->colorkey;
-
- /* Set up some basic variables */
- dstskip /= 4;
-
- while ( height-- ) {
- DUFFS_LOOP(
- {
- if ( *src != ckey ) {
- *dstp = palmap[*src];
- }
- src++;
- dstp++;
- },
- width);
- src += srcskip;
- dstp += dstskip;
- }
-}
-
-static void Blit1toNAlpha(SDL_BlitInfo *info)
-{
- int width = info->d_width;
- int height = info->d_height;
- Uint8 *src = info->s_pixels;
- int srcskip = info->s_skip;
- Uint8 *dst = info->d_pixels;
- int dstskip = info->d_skip;
- SDL_PixelFormat *dstfmt = info->dst;
- const SDL_Color *srcpal = info->src->palette->colors;
- int dstbpp;
- const int A = info->src->alpha;
-
- /* Set up some basic variables */
- dstbpp = dstfmt->BytesPerPixel;
-
- while ( height-- ) {
- int sR, sG, sB;
- int dR, dG, dB;
- DUFFS_LOOP4(
- {
- Uint32 pixel;
- sR = srcpal[*src].r;
- sG = srcpal[*src].g;
- sB = srcpal[*src].b;
- DISEMBLE_RGB(dst, dstbpp, dstfmt,
- pixel, dR, dG, dB);
- ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB);
- ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB);
- src++;
- dst += dstbpp;
- },
- width);
- src += srcskip;
- dst += dstskip;
- }
-}
-
-static void Blit1toNAlphaKey(SDL_BlitInfo *info)
-{
- int width = info->d_width;
- int height = info->d_height;
- Uint8 *src = info->s_pixels;
- int srcskip = info->s_skip;
- Uint8 *dst = info->d_pixels;
- int dstskip = info->d_skip;
- SDL_PixelFormat *srcfmt = info->src;
- SDL_PixelFormat *dstfmt = info->dst;
- const SDL_Color *srcpal = info->src->palette->colors;
- Uint32 ckey = srcfmt->colorkey;
- int dstbpp;
- const int A = srcfmt->alpha;
-
- /* Set up some basic variables */
- dstbpp = dstfmt->BytesPerPixel;
-
- while ( height-- ) {
- int sR, sG, sB;
- int dR, dG, dB;
- DUFFS_LOOP(
- {
- if ( *src != ckey ) {
- Uint32 pixel;
- sR = srcpal[*src].r;
- sG = srcpal[*src].g;
- sB = srcpal[*src].b;
- DISEMBLE_RGB(dst, dstbpp, dstfmt,
- pixel, dR, dG, dB);
- ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB);
- ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB);
- }
- src++;
- dst += dstbpp;
- },
- width);
- src += srcskip;
- dst += dstskip;
- }
-}
-
-static SDL_loblit one_blit[] = {
- NULL, Blit1to1, Blit1to2, Blit1to3, Blit1to4
-};
-
-static SDL_loblit one_blitkey[] = {
- NULL, Blit1to1Key, Blit1to2Key, Blit1to3Key, Blit1to4Key
-};
-
-SDL_loblit SDL_CalculateBlit1(SDL_Surface *surface, int blit_index)
-{
- int which;
- SDL_PixelFormat *dstfmt;
-
- dstfmt = surface->map->dst->format;
- if ( dstfmt->BitsPerPixel < 8 ) {
- which = 0;
- } else {
- which = dstfmt->BytesPerPixel;
- }
- switch(blit_index) {
- case 0: /* copy */
- return one_blit[which];
-
- case 1: /* colorkey */
- return one_blitkey[which];
-
- case 2: /* alpha */
- /* Supporting 8bpp->8bpp alpha is doable but requires lots of
- tables which consume space and takes time to precompute,
- so is better left to the user */
- return which >= 2 ? Blit1toNAlpha : NULL;
-
- case 3: /* alpha + colorkey */
- return which >= 2 ? Blit1toNAlphaKey : NULL;
-
- }
- return NULL;
-}
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