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more 2nd phase bilinear scaling optimizations: expanded more, region handling and iteration over region normalized

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git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@1065 8092fc87-c524-0410-9efc-e669fe64eaf9
This commit is contained in:
avolkov
2003-07-18 16:38:17 +00:00
parent 05c130399f
commit c969ebe7d9
1 changed files with 106 additions and 104 deletions
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sc2/src/sc2code/libs/graphics/sdl/2xscalers.c
+61 -59
View File
@@ -2465,31 +2465,30 @@ Scale_BlendPixels_bilinear (BLEND_PARAMS bp, Uint32* p, const Uint32* w)
// bilinear scaling to 2x
void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
{
int x, y, j = 0;
const int w = dst->w, h = dst->h;
int drx, dry;
int x, y;
const int w = src->w, h = src->h, dw = dst->w;
int xend, yend;
int dsrc, ddst;
SDL_Rect *region = r;
SDL_Rect limits;
SDL_PixelFormat *fmt = dst->format;
BLEND_PARAMS blend16;
Uint32 p[4]; // influential pixels array
// expand updated region if necessary
// pixels neighbooring the updated region may
// change as a result of updates
limits.x = 0;
limits.y = 0;
limits.w = src->w;
limits.h = src->h;
limits.w = w;
limits.h = h;
Scale_ExpandRect (region, 1, &limits);
drx = 2 * region->x;
dry = 2 * region->y;
xend = 2 * (region->x + region->w);
yend = 2 * (region->y + region->h);
dsrc = src->w - region->w;
ddst = 2 * dst->w - 2 * region->w;
xend = region->x + region->w;
yend = region->y + region->h;
dsrc = w - region->w;
ddst = (dw - region->w) * 2;
// precompute the blending masks and shifts
Scale_CalcChannelMasks (fmt, 16, &blend16);
@@ -2503,13 +2502,12 @@ void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
{
Uint16 *src_p = (Uint16 *) src->pixels;
Uint16 *dst_p = (Uint16 *) dst->pixels;
Uint32 p[4];
// move ptrs to the first updated pixel
src_p += src->w * region->y + region->x;
dst_p += (dst->w * region->y + region->x) * 2;
for (y = dry; y < yend; y += 2, dst_p += ddst, src_p += dsrc)
for (y = region->y; y < yend; ++y, dst_p += ddst, src_p += dsrc)
{
p[0] = src_p[0];
if (y < h - 2)
@@ -2517,9 +2515,7 @@ void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
else
p[2] = 0;
for (x = drx; x < xend; ++x, ++dst_p)
{
if (j == 0)
for (x = region->x; x < xend; ++x, ++src_p)
{
if (y < h - 2)
{
@@ -2542,26 +2538,30 @@ void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
p[1] = 0;
p[3] = 0;
}
}
*dst_p = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[j]
blend16, p, bilinear_table[0]
);
*(dst_p + w) = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[j + 1]
*(dst_p + dw) = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[1]
);
if (j == 2)
{
j = 0;
src_p++;
++dst_p;
*dst_p = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[2]
);
*(dst_p + dw) = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[3]
);
++dst_p;
p[0] = p[1];
p[2] = p[3];
}
else
j = 2;
}
}
break;
@@ -2570,13 +2570,12 @@ void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
{
PIXEL_24BIT *src_p = (PIXEL_24BIT *) src->pixels;
PIXEL_24BIT *dst_p = (PIXEL_24BIT *) dst->pixels;
Uint32 p[4];
// move ptrs to the first updated pixel
src_p += src->w * region->y + region->x;
dst_p += (dst->w * region->y + region->x) * 2;
for (y = dry; y < yend; y += 2, dst_p += ddst, src_p += dsrc)
for (y = region->y; y < yend; ++y, dst_p += ddst, src_p += dsrc)
{
p[0] = GET_PIX_24BIT (src_p);
if (y < h - 2)
@@ -2584,9 +2583,7 @@ void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
else
p[2] = 0;
for (x = drx; x < xend; ++x, ++dst_p)
{
if (j == 0)
for (x = region->x; x < xend; ++x, ++src_p)
{
if (y < h - 2)
{
@@ -2609,26 +2606,30 @@ void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
p[1] = 0;
p[3] = 0;
}
}
SET_PIX_24BIT (dst_p, Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[j]
blend16, p, bilinear_table[0]
));
SET_PIX_24BIT (dst_p + w, Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[j + 1]
SET_PIX_24BIT (dst_p + dw, Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[1]
));
if (j == 2)
{
j = 0;
src_p++;
++dst_p;
SET_PIX_24BIT (dst_p, Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[2]
));
SET_PIX_24BIT (dst_p + dw, Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[3]
));
++dst_p;
p[0] = p[1];
p[2] = p[3];
}
else
j = 2;
}
}
break;
@@ -2637,13 +2638,12 @@ void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
{
Uint32 *src_p = (Uint32 *) src->pixels;
Uint32 *dst_p = (Uint32 *) dst->pixels;
Uint32 p[4];
// move ptrs to the first updated pixel
src_p += src->w * region->y + region->x;
dst_p += (dst->w * region->y + region->x) * 2;
for (y = dry; y < yend; y += 2, dst_p += ddst, src_p += dsrc)
for (y = region->y; y < yend; ++y, dst_p += ddst, src_p += dsrc)
{
p[0] = src_p[0];
if (y < h - 2)
@@ -2651,9 +2651,7 @@ void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
else
p[2] = 0;
for (x = drx; x < xend; ++x, ++dst_p)
{
if (j == 0)
for (x = region->x; x < xend; ++x, ++src_p)
{
if (y < h - 2)
{
@@ -2676,26 +2674,30 @@ void Scale_BilinearFilter (SDL_Surface *src, SDL_Surface *dst, SDL_Rect *r)
p[1] = 0;
p[3] = 0;
}
}
*dst_p = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[j]
blend16, p, bilinear_table[0]
);
*(dst_p + w) = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[j + 1]
*(dst_p + dw) = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[1]
);
if (j == 2)
{
j = 0;
src_p++;
++dst_p;
*dst_p = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[2]
);
*(dst_p + dw) = Scale_BlendPixels_bilinear (
blend16, p, bilinear_table[3]
);
++dst_p;
p[0] = p[1];
p[2] = p[3];
}
else
j = 2;
}
}
break;