From f33ab44f8469a427e7fd7c7552b91776503ec1ce Mon Sep 17 00:00:00 2001 From: Cameron Cawley Date: Fri, 17 Nov 2023 14:08:20 +0000 Subject: [PATCH] Extend blitting support for all <8bpp formats --- src/video/SDL_blit_0.c | 589 +++++++++++++++++++++++++++-------------- 1 file changed, 389 insertions(+), 200 deletions(-) diff --git a/src/video/SDL_blit_0.c b/src/video/SDL_blit_0.c index 8be309140..bc5e6834b 100644 --- a/src/video/SDL_blit_0.c +++ b/src/video/SDL_blit_0.c @@ -27,8 +27,11 @@ /* Functions to blit from bitmaps to other surfaces */ -static void BlitBto1(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBto1(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int c; int width, height; Uint8 *src, *map, *dst; @@ -42,22 +45,28 @@ static void BlitBto1(SDL_BlitInfo *info) dst = info->dst; dstskip = info->dst_skip; map = info->table; - srcskip += width - (width + 7) / 8; + + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; if (map) { - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (1) { *dst = map[bit]; } dst++; - byte >>= 1; + byte >>= srcbpp; } src += srcskip; dst += dstskip; @@ -66,34 +75,34 @@ static void BlitBto1(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (1) { *dst = map[bit]; } dst++; - byte <<= 1; + byte <<= srcbpp; } src += srcskip; dst += dstskip; } } } else { - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (1) { *dst = bit; } dst++; - byte >>= 1; + byte >>= srcbpp; } src += srcskip; dst += dstskip; @@ -102,15 +111,15 @@ static void BlitBto1(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (1) { *dst = bit; } dst++; - byte <<= 1; + byte <<= srcbpp; } src += srcskip; dst += dstskip; @@ -119,8 +128,11 @@ static void BlitBto1(SDL_BlitInfo *info) } } -static void BlitBto2(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBto2(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int c; int width, height; Uint8 *src; @@ -135,20 +147,26 @@ static void BlitBto2(SDL_BlitInfo *info) dst = (Uint16 *)info->dst; dstskip = info->dst_skip / 2; map = (Uint16 *)info->table; - srcskip += width - (width + 7) / 8; - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; + + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (1) { *dst = map[bit]; } - byte >>= 1; + byte >>= srcbpp; dst++; } src += srcskip; @@ -158,14 +176,14 @@ static void BlitBto2(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (1) { *dst = map[bit]; } - byte <<= 1; + byte <<= srcbpp; dst++; } src += srcskip; @@ -174,8 +192,11 @@ static void BlitBto2(SDL_BlitInfo *info) } } -static void BlitBto3(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBto3(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int c, o; int width, height; Uint8 *src, *map, *dst; @@ -189,23 +210,29 @@ static void BlitBto3(SDL_BlitInfo *info) dst = info->dst; dstskip = info->dst_skip; map = info->table; - srcskip += width - (width + 7) / 8; - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; + + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (1) { o = bit * 4; dst[0] = map[o++]; dst[1] = map[o++]; dst[2] = map[o++]; } - byte >>= 1; + byte >>= srcbpp; dst += 3; } src += srcskip; @@ -215,17 +242,17 @@ static void BlitBto3(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (1) { o = bit * 4; dst[0] = map[o++]; dst[1] = map[o++]; dst[2] = map[o++]; } - byte <<= 1; + byte <<= srcbpp; dst += 3; } src += srcskip; @@ -234,8 +261,11 @@ static void BlitBto3(SDL_BlitInfo *info) } } -static void BlitBto4(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBto4(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int width, height; Uint8 *src; Uint32 *map, *dst; @@ -250,20 +280,26 @@ static void BlitBto4(SDL_BlitInfo *info) dst = (Uint32 *)info->dst; dstskip = info->dst_skip / 4; map = (Uint32 *)info->table; - srcskip += width - (width + 7) / 8; - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; + + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (1) { *dst = map[bit]; } - byte >>= 1; + byte >>= srcbpp; dst++; } src += srcskip; @@ -273,14 +309,14 @@ static void BlitBto4(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (1) { *dst = map[bit]; } - byte <<= 1; + byte <<= srcbpp; dst++; } src += srcskip; @@ -289,8 +325,11 @@ static void BlitBto4(SDL_BlitInfo *info) } } -static void BlitBto1Key(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBto1Key(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int width = info->dst_w; int height = info->dst_h; Uint8 *src = info->src; @@ -302,22 +341,27 @@ static void BlitBto1Key(SDL_BlitInfo *info) int c; /* Set up some basic variables */ - srcskip += width - (width + 7) / 8; + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; if (palmap) { - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (bit != ckey) { *dst = palmap[bit]; } dst++; - byte >>= 1; + byte >>= srcbpp; } src += srcskip; dst += dstskip; @@ -326,34 +370,34 @@ static void BlitBto1Key(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (bit != ckey) { *dst = palmap[bit]; } dst++; - byte <<= 1; + byte <<= srcbpp; } src += srcskip; dst += dstskip; } } } else { - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (bit != ckey) { *dst = bit; } dst++; - byte >>= 1; + byte >>= srcbpp; } src += srcskip; dst += dstskip; @@ -362,15 +406,15 @@ static void BlitBto1Key(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (bit != ckey) { *dst = bit; } dst++; - byte <<= 1; + byte <<= srcbpp; } src += srcskip; dst += dstskip; @@ -379,8 +423,11 @@ static void BlitBto1Key(SDL_BlitInfo *info) } } -static void BlitBto2Key(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBto2Key(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int width = info->dst_w; int height = info->dst_h; Uint8 *src = info->src; @@ -392,21 +439,26 @@ static void BlitBto2Key(SDL_BlitInfo *info) int c; /* Set up some basic variables */ - srcskip += width - (width + 7) / 8; + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; dstskip /= 2; - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (bit != ckey) { *dstp = ((Uint16 *)palmap)[bit]; } - byte >>= 1; + byte >>= srcbpp; dstp++; } src += srcskip; @@ -416,14 +468,14 @@ static void BlitBto2Key(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (bit != ckey) { *dstp = ((Uint16 *)palmap)[bit]; } - byte <<= 1; + byte <<= srcbpp; dstp++; } src += srcskip; @@ -432,8 +484,11 @@ static void BlitBto2Key(SDL_BlitInfo *info) } } -static void BlitBto3Key(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBto3Key(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int width = info->dst_w; int height = info->dst_h; Uint8 *src = info->src; @@ -445,20 +500,25 @@ static void BlitBto3Key(SDL_BlitInfo *info) int c; /* Set up some basic variables */ - srcskip += width - (width + 7) / 8; + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (bit != ckey) { SDL_memcpy(dst, &palmap[bit * 4], 3); } - byte >>= 1; + byte >>= srcbpp; dst += 3; } src += srcskip; @@ -468,14 +528,14 @@ static void BlitBto3Key(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (bit != ckey) { SDL_memcpy(dst, &palmap[bit * 4], 3); } - byte <<= 1; + byte <<= srcbpp; dst += 3; } src += srcskip; @@ -484,8 +544,11 @@ static void BlitBto3Key(SDL_BlitInfo *info) } } -static void BlitBto4Key(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBto4Key(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int width = info->dst_w; int height = info->dst_h; Uint8 *src = info->src; @@ -497,21 +560,26 @@ static void BlitBto4Key(SDL_BlitInfo *info) int c; /* Set up some basic variables */ - srcskip += width - (width + 7) / 8; + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; dstskip /= 4; - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (bit != ckey) { *dstp = ((Uint32 *)palmap)[bit]; } - byte >>= 1; + byte >>= srcbpp; dstp++; } src += srcskip; @@ -521,14 +589,14 @@ static void BlitBto4Key(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (bit != ckey) { *dstp = ((Uint32 *)palmap)[bit]; } - byte <<= 1; + byte <<= srcbpp; dstp++; } src += srcskip; @@ -537,8 +605,11 @@ static void BlitBto4Key(SDL_BlitInfo *info) } } -static void BlitBtoNAlpha(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBtoNAlpha(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int width = info->dst_w; int height = info->dst_h; Uint8 *src = info->src; @@ -556,16 +627,21 @@ static void BlitBtoNAlpha(SDL_BlitInfo *info) /* Set up some basic variables */ dstbpp = dstfmt->BytesPerPixel; - srcskip += width - (width + 7) / 8; + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (1) { sR = srcpal[bit].r; sG = srcpal[bit].g; @@ -574,7 +650,7 @@ static void BlitBtoNAlpha(SDL_BlitInfo *info) ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA); ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); } - byte >>= 1; + byte >>= srcbpp; dst += dstbpp; } src += srcskip; @@ -584,10 +660,10 @@ static void BlitBtoNAlpha(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (1) { sR = srcpal[bit].r; sG = srcpal[bit].g; @@ -596,7 +672,7 @@ static void BlitBtoNAlpha(SDL_BlitInfo *info) ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA); ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); } - byte <<= 1; + byte <<= srcbpp; dst += dstbpp; } src += srcskip; @@ -605,8 +681,11 @@ static void BlitBtoNAlpha(SDL_BlitInfo *info) } } -static void BlitBtoNAlphaKey(SDL_BlitInfo *info) +SDL_FORCE_INLINE void BlitBtoNAlphaKey(SDL_BlitInfo *info, const Uint32 srcbpp) { + const Uint32 mask = (1 << srcbpp) - 1; + const Uint32 align = (8 / srcbpp) - 1; + int width = info->dst_w; int height = info->dst_h; Uint8 *src = info->src; @@ -626,16 +705,21 @@ static void BlitBtoNAlphaKey(SDL_BlitInfo *info) /* Set up some basic variables */ dstbpp = dstfmt->BytesPerPixel; - srcskip += width - (width + 7) / 8; + if (srcbpp == 4) + srcskip += width - (width + 1) / 2; + else if (srcbpp == 2) + srcskip += width - (width + 3) / 4; + else if (srcbpp == 1) + srcskip += width - (width + 7) / 8; - if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) { + if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x01); + bit = (byte & mask); if (bit != ckey) { sR = srcpal[bit].r; sG = srcpal[bit].g; @@ -644,7 +728,7 @@ static void BlitBtoNAlphaKey(SDL_BlitInfo *info) ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA); ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); } - byte >>= 1; + byte >>= srcbpp; dst += dstbpp; } src += srcskip; @@ -654,10 +738,10 @@ static void BlitBtoNAlphaKey(SDL_BlitInfo *info) while (height--) { Uint8 byte = 0, bit; for (c = 0; c < width; ++c) { - if (!(c & 7)) { + if (!(c & align)) { byte = *src++; } - bit = (byte & 0x80) >> 7; + bit = (byte >> (8 - srcbpp)) & mask; if (bit != ckey) { sR = srcpal[bit].r; sG = srcpal[bit].g; @@ -666,7 +750,7 @@ static void BlitBtoNAlphaKey(SDL_BlitInfo *info) ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA); ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); } - byte <<= 1; + byte <<= srcbpp; dst += dstbpp; } src += srcskip; @@ -675,121 +759,226 @@ static void BlitBtoNAlphaKey(SDL_BlitInfo *info) } } -static const SDL_BlitFunc bitmap_blit[] = { - (SDL_BlitFunc)NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 -}; -static const SDL_BlitFunc colorkey_blit[] = { - (SDL_BlitFunc)NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key -}; -static void Blit4bto4(SDL_BlitInfo *info) -{ - int width = info->dst_w; - int height = info->dst_h; - Uint8 *src = info->src; - Uint32 *dst = (Uint32 *)info->dst; - int srcskip = info->src_skip; - int dstskip = info->dst_skip; - Uint32 *map = (Uint32 *)info->table; - int c; - - /* Set up some basic variables */ - srcskip += width - (width + 1) / 2; - - while (height--) { - Uint8 byte = 0, bit; - for (c = 0; c < width; ++c) { - if (!(c & 0x1)) { - byte = *src++; - } - bit = (byte & 0xF0) >> 4; - if (1) { - *dst = map[bit]; - } - byte <<= 4; - dst++; - } - src += srcskip; - dst = (Uint32 *)((Uint8 *)dst + dstskip); - } +static void Blit1bto1(SDL_BlitInfo *info) { + BlitBto1(info, 1); } -static void Blit4bto4Key(SDL_BlitInfo *info) -{ - int width = info->dst_w; - int height = info->dst_h; - Uint8 *src = info->src; - Uint32 *dst = (Uint32 *)info->dst; - int srcskip = info->src_skip; - int dstskip = info->dst_skip; - Uint32 ckey = info->colorkey; - Uint32 *map = (Uint32 *)info->table; - int c; - - /* Set up some basic variables */ - srcskip += width - (width + 1) / 2; - - while (height--) { - Uint8 byte = 0, bit; - for (c = 0; c < width; ++c) { - if (!(c & 0x1)) { - byte = *src++; - } - bit = (byte & 0xF0) >> 4; - if (bit != ckey) { - *dst = map[bit]; - } - byte <<= 4; - dst++; - } - src += srcskip; - dst = (Uint32 *)((Uint8 *)dst + dstskip); - } +static void Blit1bto2(SDL_BlitInfo *info) { + BlitBto2(info, 1); } +static void Blit1bto3(SDL_BlitInfo *info) { + BlitBto3(info, 1); +} + +static void Blit1bto4(SDL_BlitInfo *info) { + BlitBto4(info, 1); +} + +static const SDL_BlitFunc bitmap_blit_1b[] = { + (SDL_BlitFunc)NULL, Blit1bto1, Blit1bto2, Blit1bto3, Blit1bto4 +}; + +static void Blit1bto1Key(SDL_BlitInfo *info) { + BlitBto1Key(info, 1); +} + +static void Blit1bto2Key(SDL_BlitInfo *info) { + BlitBto2Key(info, 1); +} + +static void Blit1bto3Key(SDL_BlitInfo *info) { + BlitBto3Key(info, 1); +} + +static void Blit1bto4Key(SDL_BlitInfo *info) { + BlitBto4Key(info, 1); +} + +static const SDL_BlitFunc colorkey_blit_1b[] = { + (SDL_BlitFunc)NULL, Blit1bto1Key, Blit1bto2Key, Blit1bto3Key, Blit1bto4Key +}; + +static void Blit1btoNAlpha(SDL_BlitInfo *info) +{ + BlitBtoNAlpha(info, 1); +} + +static void Blit1btoNAlphaKey(SDL_BlitInfo *info) +{ + BlitBtoNAlphaKey(info, 1); +} + + + +static void Blit2bto1(SDL_BlitInfo *info) { + BlitBto1(info, 2); +} + +static void Blit2bto2(SDL_BlitInfo *info) { + BlitBto2(info, 2); +} + +static void Blit2bto3(SDL_BlitInfo *info) { + BlitBto3(info, 2); +} + +static void Blit2bto4(SDL_BlitInfo *info) { + BlitBto4(info, 2); +} + +static const SDL_BlitFunc bitmap_blit_2b[] = { + (SDL_BlitFunc)NULL, Blit2bto1, Blit2bto2, Blit2bto3, Blit2bto4 +}; + +static void Blit2bto1Key(SDL_BlitInfo *info) { + BlitBto1Key(info, 2); +} + +static void Blit2bto2Key(SDL_BlitInfo *info) { + BlitBto2Key(info, 2); +} + +static void Blit2bto3Key(SDL_BlitInfo *info) { + BlitBto3Key(info, 2); +} + +static void Blit2bto4Key(SDL_BlitInfo *info) { + BlitBto4Key(info, 2); +} + +static const SDL_BlitFunc colorkey_blit_2b[] = { + (SDL_BlitFunc)NULL, Blit2bto1Key, Blit2bto2Key, Blit2bto3Key, Blit2bto4Key +}; + +static void Blit2btoNAlpha(SDL_BlitInfo *info) +{ + BlitBtoNAlpha(info, 2); +} + +static void Blit2btoNAlphaKey(SDL_BlitInfo *info) +{ + BlitBtoNAlphaKey(info, 2); +} + + + +static void Blit4bto1(SDL_BlitInfo *info) { + BlitBto1(info, 4); +} + +static void Blit4bto2(SDL_BlitInfo *info) { + BlitBto2(info, 4); +} + +static void Blit4bto3(SDL_BlitInfo *info) { + BlitBto3(info, 4); +} + +static void Blit4bto4(SDL_BlitInfo *info) { + BlitBto4(info, 4); +} + +static const SDL_BlitFunc bitmap_blit_4b[] = { + (SDL_BlitFunc)NULL, Blit4bto1, Blit4bto2, Blit4bto3, Blit4bto4 +}; + +static void Blit4bto1Key(SDL_BlitInfo *info) { + BlitBto1Key(info, 4); +} + +static void Blit4bto2Key(SDL_BlitInfo *info) { + BlitBto2Key(info, 4); +} + +static void Blit4bto3Key(SDL_BlitInfo *info) { + BlitBto3Key(info, 4); +} + +static void Blit4bto4Key(SDL_BlitInfo *info) { + BlitBto4Key(info, 4); +} + +static const SDL_BlitFunc colorkey_blit_4b[] = { + (SDL_BlitFunc)NULL, Blit4bto1Key, Blit4bto2Key, Blit4bto3Key, Blit4bto4Key +}; + +static void Blit4btoNAlpha(SDL_BlitInfo *info) +{ + BlitBtoNAlpha(info, 4); +} + +static void Blit4btoNAlphaKey(SDL_BlitInfo *info) +{ + BlitBtoNAlphaKey(info, 4); +} + + + SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface *surface) { int which; - /* 4bits to 32bits */ - if (surface->format->BitsPerPixel == 4) { - if (surface->map->dst->format->BytesPerPixel == 4) { - switch (surface->map->info.flags & ~SDL_COPY_RLE_MASK) { - case 0: - return Blit4bto4; - - case SDL_COPY_COLORKEY: - return Blit4bto4Key; - } - } - /* We don't fully support 4-bit packed pixel modes */ - return NULL; - } - - if (surface->format->BitsPerPixel != 1) { - /* We don't support sub 8-bit packed pixel modes */ - return (SDL_BlitFunc) NULL; - } if (surface->map->dst->format->BitsPerPixel < 8) { which = 0; } else { which = surface->map->dst->format->BytesPerPixel; } - switch (surface->map->info.flags & ~SDL_COPY_RLE_MASK) { - case 0: - return bitmap_blit[which]; - case SDL_COPY_COLORKEY: - return colorkey_blit[which]; + if (SDL_PIXELTYPE(surface->format->format) == SDL_PIXELTYPE_INDEX1) { + switch (surface->map->info.flags & ~SDL_COPY_RLE_MASK) { + case 0: + return bitmap_blit_1b[which]; - case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: - return which >= 2 ? BlitBtoNAlpha : (SDL_BlitFunc) NULL; + case SDL_COPY_COLORKEY: + return colorkey_blit_1b[which]; - case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: - return which >= 2 ? BlitBtoNAlphaKey : (SDL_BlitFunc) NULL; + case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: + return which >= 2 ? Blit1btoNAlpha : (SDL_BlitFunc)NULL; + + case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: + return which >= 2 ? Blit1btoNAlphaKey : (SDL_BlitFunc)NULL; + } + return NULL; } - return (SDL_BlitFunc) NULL; + + if (SDL_PIXELTYPE(surface->format->format) == SDL_PIXELTYPE_INDEX2) { + switch (surface->map->info.flags & ~SDL_COPY_RLE_MASK) { + case 0: + return bitmap_blit_2b[which]; + + case SDL_COPY_COLORKEY: + return colorkey_blit_2b[which]; + + case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: + return which >= 2 ? Blit2btoNAlpha : (SDL_BlitFunc)NULL; + + case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: + return which >= 2 ? Blit2btoNAlphaKey : (SDL_BlitFunc)NULL; + } + return NULL; + } + + if (SDL_PIXELTYPE(surface->format->format) == SDL_PIXELTYPE_INDEX4) { + switch (surface->map->info.flags & ~SDL_COPY_RLE_MASK) { + case 0: + return bitmap_blit_4b[which]; + + case SDL_COPY_COLORKEY: + return colorkey_blit_4b[which]; + + case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: + return which >= 2 ? Blit4btoNAlpha : (SDL_BlitFunc)NULL; + + case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: + return which >= 2 ? Blit4btoNAlphaKey : (SDL_BlitFunc)NULL; + } + return NULL; + } + + return NULL; } #endif /* SDL_HAVE_BLIT_0 */