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Reduce the size of the SDL_blit_0 alpha code

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This commit is contained in:
Cameron Cawley
2024-10-12 16:06:31 +01:00
committed by Sam Lantinga
parent 05c53b5ab0
commit 3e57d996fe
1 changed files with 20 additions and 48 deletions
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68
src/video/SDL_blit_0.c
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@@ -604,11 +604,8 @@ SDL_FORCE_INLINE void BlitBto4Key(SDL_BlitInfo *info, const Uint32 srcbpp)
} }
} }
SDL_FORCE_INLINE void BlitBtoNAlpha(SDL_BlitInfo *info, const Uint32 srcbpp) static void BlitBtoNAlpha(SDL_BlitInfo *info)
{ {
const Uint32 mask = (1 << srcbpp) - 1;
const Uint32 align = (8 / srcbpp) - 1;
int width = info->dst_w; int width = info->dst_w;
int height = info->dst_h; int height = info->dst_h;
Uint8 *src = info->src; Uint8 *src = info->src;
@@ -616,15 +613,17 @@ SDL_FORCE_INLINE void BlitBtoNAlpha(SDL_BlitInfo *info, const Uint32 srcbpp)
int srcskip = info->src_skip; int srcskip = info->src_skip;
int dstskip = info->dst_skip; int dstskip = info->dst_skip;
const SDL_Color *srcpal = info->src_pal->colors; const SDL_Color *srcpal = info->src_pal->colors;
const SDL_PixelFormatDetails *srcfmt = info->src_fmt;
const SDL_PixelFormatDetails *dstfmt = info->dst_fmt; const SDL_PixelFormatDetails *dstfmt = info->dst_fmt;
int dstbpp; int srcbpp, dstbpp;
int c; int c;
Uint32 pixel; Uint32 pixel, mask, align;
unsigned sR, sG, sB; unsigned sR, sG, sB;
unsigned dR, dG, dB, dA; unsigned dR, dG, dB, dA;
const unsigned A = info->a; const unsigned A = info->a;
// Set up some basic variables // Set up some basic variables
srcbpp = srcfmt->bytes_per_pixel;
dstbpp = dstfmt->bytes_per_pixel; dstbpp = dstfmt->bytes_per_pixel;
if (srcbpp == 4) if (srcbpp == 4)
srcskip += width - (width + 1) / 2; srcskip += width - (width + 1) / 2;
@@ -632,6 +631,8 @@ SDL_FORCE_INLINE void BlitBtoNAlpha(SDL_BlitInfo *info, const Uint32 srcbpp)
srcskip += width - (width + 3) / 4; srcskip += width - (width + 3) / 4;
else if (srcbpp == 1) else if (srcbpp == 1)
srcskip += width - (width + 7) / 8; srcskip += width - (width + 7) / 8;
mask = (1 << srcbpp) - 1;
align = (8 / srcbpp) - 1;
if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) {
while (height--) { while (height--) {
@@ -680,28 +681,27 @@ SDL_FORCE_INLINE void BlitBtoNAlpha(SDL_BlitInfo *info, const Uint32 srcbpp)
} }
} }
SDL_FORCE_INLINE void BlitBtoNAlphaKey(SDL_BlitInfo *info, const Uint32 srcbpp) static void BlitBtoNAlphaKey(SDL_BlitInfo *info)
{ {
const Uint32 mask = (1 << srcbpp) - 1;
const Uint32 align = (8 / srcbpp) - 1;
int width = info->dst_w; int width = info->dst_w;
int height = info->dst_h; int height = info->dst_h;
Uint8 *src = info->src; Uint8 *src = info->src;
Uint8 *dst = info->dst; Uint8 *dst = info->dst;
int srcskip = info->src_skip; int srcskip = info->src_skip;
int dstskip = info->dst_skip; int dstskip = info->dst_skip;
const SDL_PixelFormatDetails *srcfmt = info->src_fmt;
const SDL_PixelFormatDetails *dstfmt = info->dst_fmt; const SDL_PixelFormatDetails *dstfmt = info->dst_fmt;
const SDL_Color *srcpal = info->src_pal->colors; const SDL_Color *srcpal = info->src_pal->colors;
int dstbpp; int srcbpp, dstbpp;
int c; int c;
Uint32 pixel; Uint32 pixel, mask, align;
unsigned sR, sG, sB; unsigned sR, sG, sB;
unsigned dR, dG, dB, dA; unsigned dR, dG, dB, dA;
const unsigned A = info->a; const unsigned A = info->a;
Uint32 ckey = info->colorkey; Uint32 ckey = info->colorkey;
// Set up some basic variables // Set up some basic variables
srcbpp = srcfmt->bytes_per_pixel;
dstbpp = dstfmt->bytes_per_pixel; dstbpp = dstfmt->bytes_per_pixel;
if (srcbpp == 4) if (srcbpp == 4)
srcskip += width - (width + 1) / 2; srcskip += width - (width + 1) / 2;
@@ -709,6 +709,8 @@ SDL_FORCE_INLINE void BlitBtoNAlphaKey(SDL_BlitInfo *info, const Uint32 srcbpp)
srcskip += width - (width + 3) / 4; srcskip += width - (width + 3) / 4;
else if (srcbpp == 1) else if (srcbpp == 1)
srcskip += width - (width + 7) / 8; srcskip += width - (width + 7) / 8;
mask = (1 << srcbpp) - 1;
align = (8 / srcbpp) - 1;
if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) { if (SDL_PIXELORDER(info->src_fmt->format) == SDL_BITMAPORDER_4321) {
while (height--) { while (height--) {
@@ -799,16 +801,6 @@ static const SDL_BlitFunc colorkey_blit_1b[] = {
(SDL_BlitFunc)NULL, Blit1bto1Key, Blit1bto2Key, Blit1bto3Key, Blit1bto4Key (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) { static void Blit2bto1(SDL_BlitInfo *info) {
@@ -851,16 +843,6 @@ static const SDL_BlitFunc colorkey_blit_2b[] = {
(SDL_BlitFunc)NULL, Blit2bto1Key, Blit2bto2Key, Blit2bto3Key, Blit2bto4Key (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) { static void Blit4bto1(SDL_BlitInfo *info) {
@@ -903,16 +885,6 @@ static const SDL_BlitFunc colorkey_blit_4b[] = {
(SDL_BlitFunc)NULL, Blit4bto1Key, Blit4bto2Key, Blit4bto3Key, Blit4bto4Key (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) SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface *surface)
@@ -940,10 +912,10 @@ SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface *surface)
break; break;
case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
return which >= 2 ? Blit1btoNAlpha : (SDL_BlitFunc)NULL; return which >= 2 ? BlitBtoNAlpha : (SDL_BlitFunc)NULL;
case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
return which >= 2 ? Blit1btoNAlphaKey : (SDL_BlitFunc)NULL; return which >= 2 ? BlitBtoNAlphaKey : (SDL_BlitFunc)NULL;
} }
return NULL; return NULL;
} }
@@ -963,10 +935,10 @@ SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface *surface)
break; break;
case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
return which >= 2 ? Blit2btoNAlpha : (SDL_BlitFunc)NULL; return which >= 2 ? BlitBtoNAlpha : (SDL_BlitFunc)NULL;
case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
return which >= 2 ? Blit2btoNAlphaKey : (SDL_BlitFunc)NULL; return which >= 2 ? BlitBtoNAlphaKey : (SDL_BlitFunc)NULL;
} }
return NULL; return NULL;
} }
@@ -986,10 +958,10 @@ SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface *surface)
break; break;
case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: case SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
return which >= 2 ? Blit4btoNAlpha : (SDL_BlitFunc)NULL; return which >= 2 ? BlitBtoNAlpha : (SDL_BlitFunc)NULL;
case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND: case SDL_COPY_COLORKEY | SDL_COPY_MODULATE_ALPHA | SDL_COPY_BLEND:
return which >= 2 ? Blit4btoNAlphaKey : (SDL_BlitFunc)NULL; return which >= 2 ? BlitBtoNAlphaKey : (SDL_BlitFunc)NULL;
} }
return NULL; return NULL;
} }