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Added support for blitting SDL_PIXELFORMAT_INDEX1LSB 

Fixes https://github.com/libsdl-org/SDL/issues/7844
This commit is contained in:
Sam Lantinga 2023-06-19 08:36:30 -07:00
parent d97423ebab
commit a3d4fd71c3
1 changed files with 410 additions and 169 deletions
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579
src/video/SDL_blit_0.c
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@ -45,38 +45,76 @@ static void BlitBto1(SDL_BlitInfo *info)
srcskip += width - (width + 7) / 8;
if (map) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (1) {
*dst = map[bit];
}
dst++;
byte >>= 1;
}
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)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (1) {
*dst = map[bit];
}
dst++;
byte <<= 1;
}
src += srcskip;
dst += dstskip;
}
src += srcskip;
dst += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (1) {
*dst = bit;
}
dst++;
byte >>= 1;
}
bit = (byte & 0x80) >> 7;
if (1) {
*dst = bit;
}
dst++;
byte <<= 1;
src += srcskip;
dst += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (1) {
*dst = bit;
}
dst++;
byte <<= 1;
}
src += srcskip;
dst += dstskip;
}
src += srcskip;
dst += dstskip;
}
}
}
@ -99,21 +137,40 @@ static void BlitBto2(SDL_BlitInfo *info)
map = (Uint16 *)info->table;
srcskip += width - (width + 7) / 8;
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (1) {
*dst = map[bit];
}
byte >>= 1;
dst++;
}
bit = (byte & 0x80) >> 7;
if (1) {
*dst = map[bit];
}
byte <<= 1;
dst++;
src += srcskip;
dst += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (1) {
*dst = map[bit];
}
byte <<= 1;
dst++;
}
src += srcskip;
dst += dstskip;
}
src += srcskip;
dst += dstskip;
}
}
@ -134,24 +191,46 @@ static void BlitBto3(SDL_BlitInfo *info)
map = info->table;
srcskip += width - (width + 7) / 8;
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (1) {
o = bit * 4;
dst[0] = map[o++];
dst[1] = map[o++];
dst[2] = map[o++];
}
byte >>= 1;
dst += 3;
}
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;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
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;
}
src += srcskip;
dst += dstskip;
}
}
@ -173,21 +252,40 @@ static void BlitBto4(SDL_BlitInfo *info)
map = (Uint32 *)info->table;
srcskip += width - (width + 7) / 8;
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (1) {
*dst = map[bit];
}
byte >>= 1;
dst++;
}
bit = (byte & 0x80) >> 7;
if (1) {
*dst = map[bit];
}
byte <<= 1;
dst++;
src += srcskip;
dst += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (1) {
*dst = map[bit];
}
byte <<= 1;
dst++;
}
src += srcskip;
dst += dstskip;
}
src += srcskip;
dst += dstskip;
}
}
@ -207,38 +305,76 @@ static void BlitBto1Key(SDL_BlitInfo *info)
srcskip += width - (width + 7) / 8;
if (palmap) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (bit != ckey) {
*dst = palmap[bit];
}
dst++;
byte >>= 1;
}
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)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
*dst = palmap[bit];
}
dst++;
byte <<= 1;
}
src += srcskip;
dst += dstskip;
}
src += srcskip;
dst += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (bit != ckey) {
*dst = bit;
}
dst++;
byte >>= 1;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
*dst = bit;
}
dst++;
byte <<= 1;
src += srcskip;
dst += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
*dst = bit;
}
dst++;
byte <<= 1;
}
src += srcskip;
dst += dstskip;
}
src += srcskip;
dst += dstskip;
}
}
}
@ -259,21 +395,40 @@ static void BlitBto2Key(SDL_BlitInfo *info)
srcskip += width - (width + 7) / 8;
dstskip /= 2;
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (bit != ckey) {
*dstp = ((Uint16 *)palmap)[bit];
}
byte >>= 1;
dstp++;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
*dstp = ((Uint16 *)palmap)[bit];
}
byte <<= 1;
dstp++;
src += srcskip;
dstp += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
*dstp = ((Uint16 *)palmap)[bit];
}
byte <<= 1;
dstp++;
}
src += srcskip;
dstp += dstskip;
}
src += srcskip;
dstp += dstskip;
}
}
@ -292,21 +447,40 @@ static void BlitBto3Key(SDL_BlitInfo *info)
/* 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)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (bit != ckey) {
SDL_memcpy(dst, &palmap[bit * 4], 3);
}
byte >>= 1;
dst += 3;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
SDL_memcpy(dst, &palmap[bit * 4], 3);
}
byte <<= 1;
dst += 3;
src += srcskip;
dst += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
SDL_memcpy(dst, &palmap[bit * 4], 3);
}
byte <<= 1;
dst += 3;
}
src += srcskip;
dst += dstskip;
}
src += srcskip;
dst += dstskip;
}
}
@ -326,21 +500,40 @@ static void BlitBto4Key(SDL_BlitInfo *info)
srcskip += width - (width + 7) / 8;
dstskip /= 4;
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (bit != ckey) {
*dstp = ((Uint32 *)palmap)[bit];
}
byte >>= 1;
dstp++;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
*dstp = ((Uint32 *)palmap)[bit];
}
byte <<= 1;
dstp++;
src += srcskip;
dstp += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
*dstp = ((Uint32 *)palmap)[bit];
}
byte <<= 1;
dstp++;
}
src += srcskip;
dstp += dstskip;
}
src += srcskip;
dstp += dstskip;
}
}
@ -365,26 +558,50 @@ static void BlitBtoNAlpha(SDL_BlitInfo *info)
dstbpp = dstfmt->BytesPerPixel;
srcskip += width - (width + 7) / 8;
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (1) {
sR = srcpal[bit].r;
sG = srcpal[bit].g;
sB = srcpal[bit].b;
DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
}
byte >>= 1;
dst += dstbpp;
}
bit = (byte & 0x80) >> 7;
if (1) {
sR = srcpal[bit].r;
sG = srcpal[bit].g;
sB = srcpal[bit].b;
DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
}
byte <<= 1;
dst += dstbpp;
src += srcskip;
dst += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (1) {
sR = srcpal[bit].r;
sG = srcpal[bit].g;
sB = srcpal[bit].b;
DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
}
byte <<= 1;
dst += dstbpp;
}
src += srcskip;
dst += dstskip;
}
src += srcskip;
dst += dstskip;
}
}
@ -411,26 +628,50 @@ static void BlitBtoNAlphaKey(SDL_BlitInfo *info)
dstbpp = dstfmt->BytesPerPixel;
srcskip += width - (width + 7) / 8;
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
if (info->src_fmt->format == SDL_PIXELFORMAT_INDEX1LSB) {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x01);
if (bit != ckey) {
sR = srcpal[bit].r;
sG = srcpal[bit].g;
sB = srcpal[bit].b;
DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
}
byte >>= 1;
dst += dstbpp;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
sR = srcpal[bit].r;
sG = srcpal[bit].g;
sB = srcpal[bit].b;
DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
}
byte <<= 1;
dst += dstbpp;
src += srcskip;
dst += dstskip;
}
} else {
while (height--) {
Uint8 byte = 0, bit;
for (c = 0; c < width; ++c) {
if (!(c & 7)) {
byte = *src++;
}
bit = (byte & 0x80) >> 7;
if (bit != ckey) {
sR = srcpal[bit].r;
sG = srcpal[bit].g;
sB = srcpal[bit].b;
DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA);
ALPHA_BLEND_RGBA(sR, sG, sB, A, dR, dG, dB, dA);
ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA);
}
byte <<= 1;
dst += dstbpp;
}
src += srcskip;
dst += dstskip;
}
src += srcskip;
dst += dstskip;
}
}