Mercurial > sdl-ios-xcode
diff src/video/SDL_blit_0.c @ 1895:c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 10 Jul 2006 21:04:37 +0000 |
| parents | d910939febfa |
| children | 340942cfda48 |
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--- a/src/video/SDL_blit_0.c Thu Jul 06 18:01:37 2006 +0000 +++ b/src/video/SDL_blit_0.c Mon Jul 10 21:04:37 2006 +0000 @@ -26,446 +26,456 @@ /* Functions to blit from bitmaps to other surfaces */ -static void BlitBto1(SDL_BlitInfo *info) +static void +BlitBto1(SDL_BlitInfo * info) { - int c; - int width, height; - Uint8 *src, *map, *dst; - int srcskip, dstskip; + int c; + 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; - srcskip += width-(width+7)/8; + /* 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; + srcskip += width - (width + 7) / 8; - if ( map ) { - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( 1 ) { - *dst = map[bit]; - } - dst++; - byte <<= 1; - } - src += srcskip; - dst += dstskip; - } - } else { - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( 1 ) { - *dst = bit; - } - dst++; - byte <<= 1; - } - src += srcskip; - dst += dstskip; - } - } + if (map) { + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (1) { + *dst = map[bit]; + } + dst++; + byte <<= 1; + } + src += srcskip; + dst += dstskip; + } + } else { + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (1) { + *dst = bit; + } + dst++; + byte <<= 1; + } + src += srcskip; + dst += dstskip; + } + } } -static void BlitBto2(SDL_BlitInfo *info) +static void +BlitBto2(SDL_BlitInfo * info) { - int c; - int width, height; - Uint8 *src; - Uint16 *map, *dst; - int srcskip, dstskip; + int c; + int width, height; + Uint8 *src; + Uint16 *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 = (Uint16 *)info->d_pixels; - dstskip = info->d_skip/2; - map = (Uint16 *)info->table; - srcskip += width-(width+7)/8; + /* Set up some basic variables */ + width = info->d_width; + height = info->d_height; + src = info->s_pixels; + srcskip = info->s_skip; + dst = (Uint16 *) info->d_pixels; + dstskip = info->d_skip / 2; + map = (Uint16 *) info->table; + srcskip += width - (width + 7) / 8; - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( 1 ) { - *dst = map[bit]; - } - byte <<= 1; - dst++; - } - src += srcskip; - dst += dstskip; - } + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (1) { + *dst = map[bit]; + } + byte <<= 1; + dst++; + } + src += srcskip; + dst += dstskip; + } } -static void BlitBto3(SDL_BlitInfo *info) +static void +BlitBto3(SDL_BlitInfo * info) { - int c, o; - int width, height; - Uint8 *src, *map, *dst; - int srcskip, dstskip; + int c, 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; - srcskip += width-(width+7)/8; + /* 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; + srcskip += width - (width + 7) / 8; - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( 1 ) { - o = bit * 4; - dst[0] = map[o++]; - dst[1] = map[o++]; - dst[2] = map[o++]; - } - byte <<= 1; - dst += 3; - } - src += srcskip; - dst += dstskip; - } + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (1) { + o = bit * 4; + dst[0] = map[o++]; + dst[1] = map[o++]; + dst[2] = map[o++]; + } + byte <<= 1; + dst += 3; + } + src += srcskip; + dst += dstskip; + } } -static void BlitBto4(SDL_BlitInfo *info) +static void +BlitBto4(SDL_BlitInfo * info) { - int width, height; - Uint8 *src; - Uint32 *map, *dst; - int srcskip, dstskip; - int c; + int width, height; + Uint8 *src; + Uint32 *map, *dst; + int srcskip, dstskip; + int c; - /* 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; - srcskip += width-(width+7)/8; + /* 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; + srcskip += width - (width + 7) / 8; - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( 1 ) { - *dst = map[bit]; - } - byte <<= 1; - dst++; - } - src += srcskip; - dst += dstskip; - } + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (1) { + *dst = map[bit]; + } + byte <<= 1; + dst++; + } + src += srcskip; + dst += dstskip; + } } -static void BlitBto1Key(SDL_BlitInfo *info) +static void +BlitBto1Key(SDL_BlitInfo * info) { - int width = info->d_width; - int height = info->d_height; - Uint8 *src = info->s_pixels; - Uint8 *dst = info->d_pixels; - int srcskip = info->s_skip; - int dstskip = info->d_skip; - Uint32 ckey = info->src->colorkey; - Uint8 *palmap = info->table; - int c; + int width = info->d_width; + int height = info->d_height; + Uint8 *src = info->s_pixels; + Uint8 *dst = info->d_pixels; + int srcskip = info->s_skip; + int dstskip = info->d_skip; + Uint32 ckey = info->src->colorkey; + Uint8 *palmap = info->table; + int c; - /* Set up some basic variables */ - srcskip += width-(width+7)/8; + /* Set up some basic variables */ + srcskip += width - (width + 7) / 8; - if ( palmap ) { - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( bit != ckey ) { - *dst = palmap[bit]; - } - dst++; - byte <<= 1; - } - src += srcskip; - dst += dstskip; - } - } else { - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( bit != ckey ) { - *dst = bit; - } - dst++; - byte <<= 1; - } - src += srcskip; - dst += dstskip; - } - } + if (palmap) { + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (bit != ckey) { + *dst = palmap[bit]; + } + dst++; + byte <<= 1; + } + src += srcskip; + dst += dstskip; + } + } else { + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (bit != ckey) { + *dst = bit; + } + dst++; + byte <<= 1; + } + src += srcskip; + dst += dstskip; + } + } } -static void BlitBto2Key(SDL_BlitInfo *info) +static void +BlitBto2Key(SDL_BlitInfo * info) { - int width = info->d_width; - int height = info->d_height; - Uint8 *src = info->s_pixels; - Uint16 *dstp = (Uint16 *)info->d_pixels; - int srcskip = info->s_skip; - int dstskip = info->d_skip; - Uint32 ckey = info->src->colorkey; - Uint8 *palmap = info->table; - int c; + int width = info->d_width; + int height = info->d_height; + Uint8 *src = info->s_pixels; + Uint16 *dstp = (Uint16 *) info->d_pixels; + int srcskip = info->s_skip; + int dstskip = info->d_skip; + Uint32 ckey = info->src->colorkey; + Uint8 *palmap = info->table; + int c; - /* Set up some basic variables */ - srcskip += width-(width+7)/8; - dstskip /= 2; + /* Set up some basic variables */ + srcskip += width - (width + 7) / 8; + dstskip /= 2; - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( bit != ckey ) { - *dstp=((Uint16 *)palmap)[bit]; - } - byte <<= 1; - dstp++; - } - src += srcskip; - dstp += dstskip; - } + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (bit != ckey) { + *dstp = ((Uint16 *) palmap)[bit]; + } + byte <<= 1; + dstp++; + } + src += srcskip; + dstp += dstskip; + } } -static void BlitBto3Key(SDL_BlitInfo *info) +static void +BlitBto3Key(SDL_BlitInfo * info) { - int width = info->d_width; - int height = info->d_height; - Uint8 *src = info->s_pixels; - Uint8 *dst = info->d_pixels; - int srcskip = info->s_skip; - int dstskip = info->d_skip; - Uint32 ckey = info->src->colorkey; - Uint8 *palmap = info->table; - int c; + int width = info->d_width; + int height = info->d_height; + Uint8 *src = info->s_pixels; + Uint8 *dst = info->d_pixels; + int srcskip = info->s_skip; + int dstskip = info->d_skip; + Uint32 ckey = info->src->colorkey; + Uint8 *palmap = info->table; + int c; - /* Set up some basic variables */ - srcskip += width-(width+7)/8; + /* Set up some basic variables */ + srcskip += width - (width + 7) / 8; - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( bit != ckey ) { - SDL_memcpy(dst, &palmap[bit*4], 3); - } - byte <<= 1; - dst += 3; - } - src += srcskip; - dst += dstskip; - } + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (bit != ckey) { + SDL_memcpy(dst, &palmap[bit * 4], 3); + } + byte <<= 1; + dst += 3; + } + src += srcskip; + dst += dstskip; + } } -static void BlitBto4Key(SDL_BlitInfo *info) +static void +BlitBto4Key(SDL_BlitInfo * info) { - int width = info->d_width; - int height = info->d_height; - Uint8 *src = info->s_pixels; - Uint32 *dstp = (Uint32 *)info->d_pixels; - int srcskip = info->s_skip; - int dstskip = info->d_skip; - Uint32 ckey = info->src->colorkey; - Uint8 *palmap = info->table; - int c; + int width = info->d_width; + int height = info->d_height; + Uint8 *src = info->s_pixels; + Uint32 *dstp = (Uint32 *) info->d_pixels; + int srcskip = info->s_skip; + int dstskip = info->d_skip; + Uint32 ckey = info->src->colorkey; + Uint8 *palmap = info->table; + int c; - /* Set up some basic variables */ - srcskip += width-(width+7)/8; - dstskip /= 4; + /* Set up some basic variables */ + srcskip += width - (width + 7) / 8; + dstskip /= 4; - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( bit != ckey ) { - *dstp=((Uint32 *)palmap)[bit]; - } - byte <<= 1; - dstp++; - } - src += srcskip; - dstp += dstskip; - } + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (bit != ckey) { + *dstp = ((Uint32 *) palmap)[bit]; + } + byte <<= 1; + dstp++; + } + src += srcskip; + dstp += dstskip; + } } -static void BlitBtoNAlpha(SDL_BlitInfo *info) +static void +BlitBtoNAlpha(SDL_BlitInfo * info) { - int width = info->d_width; - int height = info->d_height; - Uint8 *src = info->s_pixels; - Uint8 *dst = info->d_pixels; - int srcskip = info->s_skip; - int dstskip = info->d_skip; - const SDL_Color *srcpal = info->src->palette->colors; - SDL_PixelFormat *dstfmt = info->dst; - int dstbpp; - int c; - const int A = info->src->alpha; + int width = info->d_width; + int height = info->d_height; + Uint8 *src = info->s_pixels; + Uint8 *dst = info->d_pixels; + int srcskip = info->s_skip; + int dstskip = info->d_skip; + const SDL_Color *srcpal = info->src->palette->colors; + SDL_PixelFormat *dstfmt = info->dst; + int dstbpp; + int c; + const int A = info->src->alpha; - /* Set up some basic variables */ - dstbpp = dstfmt->BytesPerPixel; - srcskip += width-(width+7)/8; + /* Set up some basic variables */ + dstbpp = dstfmt->BytesPerPixel; + srcskip += width - (width + 7) / 8; - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( 1 ) { - Uint32 pixel; - unsigned sR, sG, sB; - unsigned dR, dG, dB; - sR = srcpal[bit].r; - sG = srcpal[bit].g; - sB = srcpal[bit].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); - } - byte <<= 1; - dst += dstbpp; - } - src += srcskip; - dst += dstskip; - } + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (1) { + Uint32 pixel; + unsigned sR, sG, sB; + unsigned dR, dG, dB; + sR = srcpal[bit].r; + sG = srcpal[bit].g; + sB = srcpal[bit].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); + } + byte <<= 1; + dst += dstbpp; + } + src += srcskip; + dst += dstskip; + } } -static void BlitBtoNAlphaKey(SDL_BlitInfo *info) +static void +BlitBtoNAlphaKey(SDL_BlitInfo * info) { - int width = info->d_width; - int height = info->d_height; - Uint8 *src = info->s_pixels; - Uint8 *dst = info->d_pixels; - int srcskip = info->s_skip; - int dstskip = info->d_skip; - SDL_PixelFormat *srcfmt = info->src; - SDL_PixelFormat *dstfmt = info->dst; - const SDL_Color *srcpal = srcfmt->palette->colors; - int dstbpp; - int c; - const int A = srcfmt->alpha; - Uint32 ckey = srcfmt->colorkey; + int width = info->d_width; + int height = info->d_height; + Uint8 *src = info->s_pixels; + Uint8 *dst = info->d_pixels; + int srcskip = info->s_skip; + int dstskip = info->d_skip; + SDL_PixelFormat *srcfmt = info->src; + SDL_PixelFormat *dstfmt = info->dst; + const SDL_Color *srcpal = srcfmt->palette->colors; + int dstbpp; + int c; + const int A = srcfmt->alpha; + Uint32 ckey = srcfmt->colorkey; - /* Set up some basic variables */ - dstbpp = dstfmt->BytesPerPixel; - srcskip += width-(width+7)/8; + /* Set up some basic variables */ + dstbpp = dstfmt->BytesPerPixel; + srcskip += width - (width + 7) / 8; - while ( height-- ) { - Uint8 byte = 0, bit; - for ( c=0; c<width; ++c ) { - if ( (c&7) == 0 ) { - byte = *src++; - } - bit = (byte&0x80)>>7; - if ( bit != ckey ) { - int sR, sG, sB; - int dR, dG, dB; - Uint32 pixel; - sR = srcpal[bit].r; - sG = srcpal[bit].g; - sB = srcpal[bit].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); - } - byte <<= 1; - dst += dstbpp; - } - src += srcskip; - dst += dstskip; - } + while (height--) { + Uint8 byte = 0, bit; + for (c = 0; c < width; ++c) { + if ((c & 7) == 0) { + byte = *src++; + } + bit = (byte & 0x80) >> 7; + if (bit != ckey) { + int sR, sG, sB; + int dR, dG, dB; + Uint32 pixel; + sR = srcpal[bit].r; + sG = srcpal[bit].g; + sB = srcpal[bit].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); + } + byte <<= 1; + dst += dstbpp; + } + src += srcskip; + dst += dstskip; + } } static SDL_loblit bitmap_blit[] = { - NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 + NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 }; static SDL_loblit colorkey_blit[] = { NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key }; -SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int blit_index) +SDL_loblit +SDL_CalculateBlit0(SDL_Surface * surface, int blit_index) { - int which; + int which; - if ( surface->format->BitsPerPixel != 1 ) { - /* We don't support sub 8-bit packed pixel modes */ - return NULL; - } - if ( surface->map->dst->format->BitsPerPixel < 8 ) { - which = 0; - } else { - which = surface->map->dst->format->BytesPerPixel; - } - switch(blit_index) { - case 0: /* copy */ - return bitmap_blit[which]; + if (surface->format->BitsPerPixel != 1) { + /* We don't support sub 8-bit packed pixel modes */ + return NULL; + } + if (surface->map->dst->format->BitsPerPixel < 8) { + which = 0; + } else { + which = surface->map->dst->format->BytesPerPixel; + } + switch (blit_index) { + case 0: /* copy */ + return bitmap_blit[which]; - case 1: /* colorkey */ - return colorkey_blit[which]; + case 1: /* colorkey */ + return colorkey_blit[which]; - case 2: /* alpha */ - return which >= 2 ? BlitBtoNAlpha : NULL; + case 2: /* alpha */ + return which >= 2 ? BlitBtoNAlpha : NULL; - case 4: /* alpha + colorkey */ - return which >= 2 ? BlitBtoNAlphaKey : NULL; - } - return NULL; + case 4: /* alpha + colorkey */ + return which >= 2 ? BlitBtoNAlphaKey : NULL; + } + return NULL; } +/* vi: set ts=4 sw=4 expandtab: */