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Integerized & optimized trilinear scaling

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git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@887 8092fc87-c524-0410-9efc-e669fe64eaf9
This commit is contained in:
gewlitys
2003-03-16 03:01:26 +00:00
parent 84bc3cca4b
commit b68e09ae2e
3 changed files with 183 additions and 152 deletions
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sc2/src/sc2code/libs/graphics/sdl/canvas.c
+176 -147
View File
@@ -7,6 +7,17 @@
typedef SDL_Surface *NativeCanvas;
static Uint8 btable[256][256];
void
TFB_DrawCanvas_Initialize (void)
{
int i, j;
for (i = 0; i < 256; ++i)
for (j = 0; j < 256; ++j)
btable[j][i] = (j * i) >> 8;
}
void
TFB_DrawCanvas_Line (int x1, int y1, int x2, int y2, int r, int g, int b, TFB_Canvas target)
{
@@ -450,21 +461,19 @@ TFB_DrawCanvas_Rescale_Nearest (TFB_Canvas src_canvas, TFB_Canvas dest_canvas, E
void
TFB_DrawCanvas_Rescale_Trilinear (TFB_Canvas src_canvas, TFB_Canvas dest_canvas, TFB_Canvas src_mipmap, EXTENT size)
{
// TODO: this can be optimized a lot..
// - make everything integer-only, use lookup tables, read/modify
// pixels directly instead of SDL_GetRGB(), etc.
SDL_Surface *src = (SDL_Surface *)src_canvas;
SDL_Surface *dst = (SDL_Surface *)dest_canvas;
SDL_Surface *mipmap = (SDL_Surface *)src_mipmap;
SDL_PixelFormat *dstfmt = dst->format;
const int dstopaque = 0xff << dstfmt->Ashift;
const int w = size.width, h = size.height;
const int ALPHA_THRESHOLD = 128;
float ratio = ((float)w / src->w) * 2.0f - 1.0f;
if (ratio < 0.0f)
ratio = 0.0f;
if (ratio > 1.0f)
ratio = 1.0f;
int ratio = (int)(256.0f * (((float)w / src->w) * 2.0f - 1.0f));
if (ratio < 0)
ratio = 0;
if (ratio > 256)
ratio = 256;
if (size.width > dst->w || size.height > dst->h)
{
@@ -476,14 +485,15 @@ TFB_DrawCanvas_Rescale_Trilinear (TFB_Canvas src_canvas, TFB_Canvas dest_canvas,
if (src->format->BytesPerPixel == 1 && dst->format->BytesPerPixel == 4 &&
mipmap->format->BytesPerPixel == 1)
{
float fsx0 = (float)src->w / w;
float fsy0 = (float)src->h / h;
float fsx1 = (float)mipmap->w / w;
float fsy1 = (float)mipmap->h / h;
float v0 = 0.0f;
float v1 = 0.0f;
SDL_Color *srcpal = src->format->palette->colors;
SDL_Color *mmpal = mipmap->format->palette->colors;
Uint32 fsx0 = (int)(65536.0f * (float)src->w / w);
Uint32 fsy0 = (int)(65536.0f * (float)src->h / h);
Uint32 fsx1 = (int)(65536.0f * (float)mipmap->w / w);
Uint32 fsy1 = (int)(65536.0f * (float)mipmap->h / h);
Uint32 ck0 = src->format->colorkey;
Uint32 ck1 = mipmap->format->colorkey;
int sx0 = 0, sy0 = 0, sx1 = 0, sy1 = 0;
int x, y;
SDL_LockSurface(src);
@@ -492,158 +502,173 @@ TFB_DrawCanvas_Rescale_Trilinear (TFB_Canvas src_canvas, TFB_Canvas dest_canvas,
for (y = 0; y < h; ++y)
{
float u0 = 0.0f;
float u1 = 0.0f;
int iv0 = (int)v0;
int iv1 = (int)v1;
float decy0 = v0 - iv0;
float decy1 = v1 - iv1;
Uint32 *dst_p = (Uint32 *)dst->pixels + y * dst->w;
Uint8 *src_a0 = (Uint8 *)src->pixels + (sy0 >> 16) * src->pitch;
Uint8 *src_a1 = (Uint8 *)mipmap->pixels + (sy1 >> 16) * mipmap->pitch;
for (x = 0; x < w; ++x)
{
int iu0 = (int)u0;
int iu1 = (int)u1;
float decx0 = u0 - iu0;
float decx1 = u1 - iu1;
float ul0 = (1.0f - decx0) * (1.0f - decy0);
float ul1 = (1.0f - decx1) * (1.0f - decy1);
float ur0 = decx0 * (1.0f - decy0);
float ur1 = decx1 * (1.0f - decy1);
float ll0 = (1.0f - decx0) * decy0;
float ll1 = (1.0f - decx1) * decy1;
float lr0 = decx0 * decy0;
float lr1 = decx1 * decy1;
Uint8 u0 = (sx0 >> 8) & 0xff;
Uint8 u1 = (sx1 >> 8) & 0xff;
Uint8 v0 = (sy0 >> 8) & 0xff;
Uint8 v1 = (sy1 >> 8) & 0xff;
Uint8 ul0 = btable[255 - u0][255 - v0];
Uint8 ul1 = btable[255 - u1][255 - v1];
Uint8 ur0 = btable[u0][255 - v0];
Uint8 ur1 = btable[u1][255 - v1];
Uint8 ll0 = btable[255 - u0][v0];
Uint8 ll1 = btable[255 - u1][v1];
Uint8 lr0 = btable[u0][v0];
Uint8 lr1 = btable[u1][v1];
Uint8 r0[5], r1[5], g0[5], g1[5], b0[5], b1[5], a0[5], a1[5];
Uint8 c;
Uint8 *src_p0 = (Uint8 *)src->pixels + iv0 * src->pitch + iu0;
Uint8 *src_p1 = (Uint8 *)mipmap->pixels + iv1 * mipmap->pitch + iu1;
Uint32 *dst_p = (Uint32 *)dst->pixels + y * dst->w + x;
Uint8 *src_p0 = src_a0 + (sx0 >> 16);
Uint8 *src_p1 = src_a1 + (sx1 >> 16);
if (iu0 <= src->w - 2)
if ((sx0 >> 16) <= src->w - 2)
{
a0[0] = ((c = *src_p0) == ck0) ? 0 : 255;
SDL_GetRGB (c, src->format, &r0[0], &g0[0], &b0[0]);
r0[0] = srcpal[c].r;
g0[0] = srcpal[c].g;
b0[0] = srcpal[c].b;
a0[1] = ((c = *(src_p0 + 1)) == ck0) ? 0 : 255;
SDL_GetRGB (c, src->format, &r0[1], &g0[1], &b0[1]);
if (iv0 <= src->h - 2)
r0[1] = srcpal[c].r;
g0[1] = srcpal[c].g;
b0[1] = srcpal[c].b;
if ((sy0 >> 16) <= src->h - 2)
{
a0[2] = ((c = *(src_p0 + src->pitch)) == ck0) ? 0 : 255;
SDL_GetRGB (c, src->format, &r0[2], &g0[2], &b0[2]);
r0[2] = srcpal[c].r;
g0[2] = srcpal[c].g;
b0[2] = srcpal[c].b;
a0[3] = ((c = *(src_p0 + src->pitch + 1)) == ck0) ? 0 : 255;
SDL_GetRGB (c, src->format, &r0[3], &g0[3], &b0[3]);
r0[3] = srcpal[c].r;
g0[3] = srcpal[c].g;
b0[3] = srcpal[c].b;
}
else
{
a0[2] = a0[0];
r0[2] = r0[0];
g0[2] = g0[0];
b0[2] = b0[0];
a0[2] = a0[0];
a0[3] = a0[1];
r0[3] = r0[1];
g0[3] = g0[1];
b0[3] = b0[1];
a0[3] = a0[1];
}
}
else
{
a0[0] = ((c = *src_p0) == ck0) ? 0 : 255;
SDL_GetRGB (c, src->format, &r0[0], &g0[0], &b0[0]);
r0[1] = r0[0];
g0[1] = g0[0];
b0[1] = b0[0];
a0[1] = a0[0];
if (iv0 <= src->h - 2)
a0[0] = a0[1] = ((c = *src_p0) == ck0) ? 0 : 255;
r0[0] = r0[1] = srcpal[c].r;
g0[0] = g0[1] = srcpal[c].g;
b0[0] = b0[1] = srcpal[c].b;
if ((sy0 >> 16) <= src->h - 2)
{
a0[2] = ((c = *(src_p0 + src->pitch)) == ck0) ? 0 : 255;
SDL_GetRGB (c, src->format, &r0[2], &g0[2], &b0[2]);
r0[3] = r0[2];
g0[3] = g0[2];
b0[3] = b0[2];
a0[3] = a0[2];
a0[2] = a0[3] = ((c = *(src_p0 + src->pitch)) == ck0) ? 0 : 255;
r0[2] = r0[3] = srcpal[c].r;
g0[2] = g0[3] = srcpal[c].g;
b0[2] = b0[3] = srcpal[c].b;
}
else
{
a0[2] = a0[3] = a0[0];
r0[2] = r0[3] = r0[0];
g0[2] = g0[3] = g0[0];
b0[2] = b0[3] = b0[0];
a0[2] = a0[3] = a0[0];
}
}
if (iu1 <= mipmap->w - 2)
if ((sx1 >> 16) <= mipmap->w - 2)
{
a1[0] = ((c = *src_p1) == ck1) ? 0 : 255;
SDL_GetRGB (c, mipmap->format, &r1[0], &g1[0], &b1[0]);
r1[0] = mmpal[c].r;
g1[0] = mmpal[c].g;
b1[0] = mmpal[c].b;
a1[1] = ((c = *(src_p1 + 1)) == ck1) ? 0 : 255;
SDL_GetRGB (c, mipmap->format, &r1[1], &g1[1], &b1[1]);
if (iv1 <= mipmap->h - 2)
r1[1] = mmpal[c].r;
g1[1] = mmpal[c].g;
b1[1] = mmpal[c].b;
if ((sy1 >> 16) <= mipmap->h - 2)
{
a1[2] = ((c = *(src_p1 + mipmap->pitch)) == ck1) ? 0 : 255;
SDL_GetRGB (c, mipmap->format, &r1[2], &g1[2], &b1[2]);
r1[2] = mmpal[c].r;
g1[2] = mmpal[c].g;
b1[2] = mmpal[c].b;
a1[3] = ((c = *(src_p1 + mipmap->pitch + 1)) == ck1) ? 0 : 255;
SDL_GetRGB (c, mipmap->format, &r1[3], &g1[3], &b1[3]);
r1[3] = mmpal[c].r;
g1[3] = mmpal[c].g;
b1[3] = mmpal[c].b;
}
else
{
a1[2] = a1[0];
r1[2] = r1[0];
g1[2] = g1[0];
b1[2] = b1[0];
a1[2] = a1[0];
a1[3] = a1[1];
r1[3] = r1[1];
g1[3] = g1[1];
b1[3] = b1[1];
a1[3] = a1[1];
}
}
else
{
a1[0] = ((c = *src_p1) == ck1) ? 0 : 255;
SDL_GetRGB (c, mipmap->format, &r1[0], &g1[0], &b1[0]);
r1[1] = r1[0];
g1[1] = g1[0];
b1[1] = b1[0];
a1[1] = a1[0];
if (iv1 <= mipmap->h - 2)
a1[0] = a1[1] = ((c = *src_p1) == ck1) ? 0 : 255;
r1[0] = r1[1] = mmpal[c].r;
g1[0] = g1[1] = mmpal[c].g;
b1[0] = b1[1] = mmpal[c].b;
if ((sy1 >> 16) <= mipmap->h - 2)
{
a1[2] = ((c = *(src_p1 + mipmap->pitch)) == ck1) ? 0 : 255;
SDL_GetRGB (c, mipmap->format, &r1[2], &g1[2], &b1[2]);
r1[3] = r1[2];
g1[3] = g1[2];
b1[3] = b1[2];
a1[3] = a1[2];
a1[2] = a1[3] = ((c = *(src_p1 + mipmap->pitch)) == ck1) ? 0 : 255;
r1[2] = r1[3] = mmpal[c].r;
g1[2] = g1[3] = mmpal[c].g;
b1[2] = b1[3] = mmpal[c].b;
}
else
{
a1[2] = a1[3] = a1[0];
r1[2] = r1[3] = r1[0];
g1[2] = g1[3] = g1[0];
b1[2] = b1[3] = b1[0];
a1[2] = a1[3] = a1[0];
}
}
r0[4] = (Uint8)(ul0 * r0[0] + ur0 * r0[1] + ll0 * r0[2] + lr0 * r0[3]);
g0[4] = (Uint8)(ul0 * g0[0] + ur0 * g0[1] + ll0 * g0[2] + lr0 * g0[3]);
b0[4] = (Uint8)(ul0 * b0[0] + ur0 * b0[1] + ll0 * b0[2] + lr0 * b0[3]);
a0[4] = (Uint8)(ul0 * a0[0] + ur0 * a0[1] + ll0 * a0[2] + lr0 * a0[3]);
a0[4] = ((ul0 * a0[0]) >> 8) + ((ur0 * a0[1]) >> 8) + ((ll0 * a0[2]) >> 8) + ((lr0 * a0[3]) >> 8);
a1[4] = ((ul1 * a1[0]) >> 8) + ((ur1 * a1[1]) >> 8) + ((ll1 * a1[2]) >> 8) + ((lr1 * a1[3]) >> 8);
r1[4] = (Uint8)(ul1 * r1[0] + ur1 * r1[1] + ll1 * r1[2] + lr1 * r1[3]);
g1[4] = (Uint8)(ul1 * g1[0] + ur1 * g1[1] + ll1 * g1[2] + lr1 * g1[3]);
b1[4] = (Uint8)(ul1 * b1[0] + ur1 * b1[1] + ll1 * b1[2] + lr1 * b1[3]);
a1[4] = (Uint8)(ul1 * a1[0] + ur1 * a1[1] + ll1 * a1[2] + lr1 * a1[3]);
if ((((a0[4] - a1[4]) * ratio) >> 8) + a1[4] > ALPHA_THRESHOLD)
{
r0[4] = ((ul0 * r0[0]) >> 8) + ((ur0 * r0[1]) >> 8) + ((ll0 * r0[2]) >> 8) + ((lr0 * r0[3]) >> 8);
g0[4] = ((ul0 * g0[0]) >> 8) + ((ur0 * g0[1]) >> 8) + ((ll0 * g0[2]) >> 8) + ((lr0 * g0[3]) >> 8);
b0[4] = ((ul0 * b0[0]) >> 8) + ((ur0 * b0[1]) >> 8) + ((ll0 * b0[2]) >> 8) + ((lr0 * b0[3]) >> 8);
*dst_p = SDL_MapRGBA(dst->format,
(Uint8)((r0[4] - r1[4]) * ratio + r1[4]),
(Uint8)((g0[4] - g1[4]) * ratio + g1[4]),
(Uint8)((b0[4] - b1[4]) * ratio + b1[4]),
(Uint8)(((a0[4] - a1[4]) * ratio + a1[4]) > ALPHA_THRESHOLD ? 255 : 0));
r1[4] = ((ul1 * r1[0]) >> 8) + ((ur1 * r1[1]) >> 8) + ((ll1 * r1[2]) >> 8) + ((lr1 * r1[3]) >> 8);
g1[4] = ((ul1 * g1[0]) >> 8) + ((ur1 * g1[1]) >> 8) + ((ll1 * g1[2]) >> 8) + ((lr1 * g1[3]) >> 8);
b1[4] = ((ul1 * b1[0]) >> 8) + ((ur1 * b1[1]) >> 8) + ((ll1 * b1[2]) >> 8) + ((lr1 * b1[3]) >> 8);
u0 += fsx0;
u1 += fsx1;
*dst_p++ =
(((((r0[4] - r1[4]) * ratio) >> 8) + r1[4]) << dstfmt->Rshift) |
(((((g0[4] - g1[4]) * ratio) >> 8) + g1[4]) << dstfmt->Gshift) |
(((((b0[4] - b1[4]) * ratio) >> 8) + b1[4]) << dstfmt->Bshift) |
dstopaque;
}
v0 += fsy0;
v1 += fsy1;
else
{
*dst_p++ = 0;
}
sx0 += fsx0;
sx1 += fsx1;
}
sx0 = sx1 = 0;
sy0 += fsy0;
sy1 += fsy1;
}
SDL_UnlockSurface(mipmap);
@@ -653,12 +678,11 @@ TFB_DrawCanvas_Rescale_Trilinear (TFB_Canvas src_canvas, TFB_Canvas dest_canvas,
else if (src->format->BytesPerPixel == 4 && dst->format->BytesPerPixel == 4 &&
mipmap->format->BytesPerPixel == 4)
{
float fsx0 = (float)src->w / w;
float fsy0 = (float)src->h / h;
float fsx1 = (float)mipmap->w / w;
float fsy1 = (float)mipmap->h / h;
float v0 = 0.0f;
float v1 = 0.0f;
Uint32 fsx0 = (int)(65536.0f * (float)src->w / w);
Uint32 fsy0 = (int)(65536.0f * (float)src->h / h);
Uint32 fsx1 = (int)(65536.0f * (float)mipmap->w / w);
Uint32 fsy1 = (int)(65536.0f * (float)mipmap->h / h);
int sx0 = 0, sy0 = 0, sx1 = 0, sy1 = 0;
int x, y;
SDL_LockSurface(src);
@@ -667,39 +691,35 @@ TFB_DrawCanvas_Rescale_Trilinear (TFB_Canvas src_canvas, TFB_Canvas dest_canvas,
for (y = 0; y < h; ++y)
{
float u0 = 0.0f;
float u1 = 0.0f;
int iv0 = (int)v0;
int iv1 = (int)v1;
float decy0 = v0 - iv0;
float decy1 = v1 - iv1;
Uint32 *dst_p = (Uint32 *)dst->pixels + y * dst->w;
Uint32 *src_a0 = (Uint32 *)src->pixels + (sy0 >> 16) * src->w;
Uint32 *src_a1 = (Uint32 *)mipmap->pixels + (sy1 >> 16) * mipmap->w;
for (x = 0; x < w; ++x)
{
int iu0 = (int)u0;
int iu1 = (int)u1;
float decx0 = u0 - iu0;
float decx1 = u1 - iu1;
float ul0 = (1.0f - decx0) * (1.0f - decy0);
float ul1 = (1.0f - decx1) * (1.0f - decy1);
float ur0 = decx0 * (1.0f - decy0);
float ur1 = decx1 * (1.0f - decy1);
float ll0 = (1.0f - decx0) * decy0;
float ll1 = (1.0f - decx1) * decy1;
float lr0 = decx0 * decy0;
float lr1 = decx1 * decy1;
Uint8 u0 = (sx0 >> 8) & 0xff;
Uint8 u1 = (sx1 >> 8) & 0xff;
Uint8 v0 = (sy0 >> 8) & 0xff;
Uint8 v1 = (sy1 >> 8) & 0xff;
Uint8 ul0 = btable[255 - u0][255 - v0];
Uint8 ul1 = btable[255 - u1][255 - v1];
Uint8 ur0 = btable[u0][255 - v0];
Uint8 ur1 = btable[u1][255 - v1];
Uint8 ll0 = btable[255 - u0][v0];
Uint8 ll1 = btable[255 - u1][v1];
Uint8 lr0 = btable[u0][v0];
Uint8 lr1 = btable[u1][v1];
Uint8 r0[5], r1[5], g0[5], g1[5], b0[5], b1[5], a0[5], a1[5];
Uint32 *src_p0 = (Uint32 *)src->pixels + iv0 * src->w + iu0;
Uint32 *src_p1 = (Uint32 *)mipmap->pixels + iv1 * mipmap->w + iu1;
Uint32 *dst_p = (Uint32 *)dst->pixels + y * dst->w + x;
Uint32 *src_p0 = src_a0 + (sx0 >> 16);
Uint32 *src_p1 = src_a1 + (sx1 >> 16);
if (iu0 <= src->w - 2)
if ((sx0 >> 16) <= src->w - 2)
{
SDL_GetRGBA (*src_p0, src->format, &r0[0], &g0[0], &b0[0], &a0[0]);
SDL_GetRGBA (*(src_p0 + 1), src->format, &r0[1], &g0[1], &b0[1], &a0[1]);
if (iv0 <= src->h - 2)
if ((sy0 >> 16) <= src->h - 2)
{
SDL_GetRGBA (*(src_p0 + src->w), src->format, &r0[2], &g0[2], &b0[2], &a0[2]);
SDL_GetRGBA (*(src_p0 + src->w + 1), src->format, &r0[3], &g0[3], &b0[3], &a0[3]);
@@ -723,7 +743,7 @@ TFB_DrawCanvas_Rescale_Trilinear (TFB_Canvas src_canvas, TFB_Canvas dest_canvas,
g0[1] = g0[0];
b0[1] = b0[0];
a0[1] = a0[0];
if (iv0 <= src->h - 2)
if ((sy0 >> 16) <= src->h - 2)
{
SDL_GetRGBA (*(src_p0 + src->w), src->format, &r0[2], &g0[2], &b0[2], &a0[2]);
r0[3] = r0[2];
@@ -740,11 +760,11 @@ TFB_DrawCanvas_Rescale_Trilinear (TFB_Canvas src_canvas, TFB_Canvas dest_canvas,
}
}
if (iu1 <= mipmap->w - 2)
if ((sx1 >> 16) <= mipmap->w - 2)
{
SDL_GetRGBA (*src_p1, mipmap->format, &r1[0], &g1[0], &b1[0], &a1[0]);
SDL_GetRGBA (*(src_p1 + 1), mipmap->format, &r1[1], &g1[1], &b1[1], &a1[1]);
if (iv1 <= mipmap->h - 2)
if ((sy1 >> 16) <= mipmap->h - 2)
{
SDL_GetRGBA (*(src_p1 + mipmap->w) , mipmap->format, &r1[2], &g1[2], &b1[2], &a1[2]);
SDL_GetRGBA (*(src_p1 + mipmap->w + 1), mipmap->format, &r1[3], &g1[3], &b1[3], &a1[3]);
@@ -768,7 +788,7 @@ TFB_DrawCanvas_Rescale_Trilinear (TFB_Canvas src_canvas, TFB_Canvas dest_canvas,
g1[1] = g1[0];
b1[1] = b1[0];
a1[1] = a1[0];
if (iv1 <= mipmap->h - 2)
if ((sy1 >> 16) <= mipmap->h - 2)
{
SDL_GetRGBA (*(src_p1 + mipmap->w), mipmap->format, &r1[2], &g1[2], &b1[2], &a1[2]);
r1[3] = r1[2];
@@ -785,27 +805,36 @@ TFB_DrawCanvas_Rescale_Trilinear (TFB_Canvas src_canvas, TFB_Canvas dest_canvas,
}
}
r0[4] = (Uint8)(ul0 * r0[0] + ur0 * r0[1] + ll0 * r0[2] + lr0 * r0[3]);
g0[4] = (Uint8)(ul0 * g0[0] + ur0 * g0[1] + ll0 * g0[2] + lr0 * g0[3]);
b0[4] = (Uint8)(ul0 * b0[0] + ur0 * b0[1] + ll0 * b0[2] + lr0 * b0[3]);
a0[4] = (Uint8)(ul0 * a0[0] + ur0 * a0[1] + ll0 * a0[2] + lr0 * a0[3]);
a0[4] = ((ul0 * a0[0]) >> 8) + ((ur0 * a0[1]) >> 8) + ((ll0 * a0[2]) >> 8) + ((lr0 * a0[3]) >> 8);
a1[4] = ((ul1 * a1[0]) >> 8) + ((ur1 * a1[1]) >> 8) + ((ll1 * a1[2]) >> 8) + ((lr1 * a1[3]) >> 8);
r1[4] = (Uint8)(ul1 * r1[0] + ur1 * r1[1] + ll1 * r1[2] + lr1 * r1[3]);
g1[4] = (Uint8)(ul1 * g1[0] + ur1 * g1[1] + ll1 * g1[2] + lr1 * g1[3]);
b1[4] = (Uint8)(ul1 * b1[0] + ur1 * b1[1] + ll1 * b1[2] + lr1 * b1[3]);
a1[4] = (Uint8)(ul1 * a1[0] + ur1 * a1[1] + ll1 * a1[2] + lr1 * a1[3]);
if ((((a0[4] - a1[4]) * ratio) >> 8) + a1[4] > ALPHA_THRESHOLD)
{
r0[4] = ((ul0 * r0[0]) >> 8) + ((ur0 * r0[1]) >> 8) + ((ll0 * r0[2]) >> 8) + ((lr0 * r0[3]) >> 8);
g0[4] = ((ul0 * g0[0]) >> 8) + ((ur0 * g0[1]) >> 8) + ((ll0 * g0[2]) >> 8) + ((lr0 * g0[3]) >> 8);
b0[4] = ((ul0 * b0[0]) >> 8) + ((ur0 * b0[1]) >> 8) + ((ll0 * b0[2]) >> 8) + ((lr0 * b0[3]) >> 8);
*dst_p = SDL_MapRGBA(dst->format,
(Uint8)((r0[4] - r1[4]) * ratio + r1[4]),
(Uint8)((g0[4] - g1[4]) * ratio + g1[4]),
(Uint8)((b0[4] - b1[4]) * ratio + b1[4]),
(Uint8)(((a0[4] - a1[4]) * ratio + a1[4]) > ALPHA_THRESHOLD ? 255 : 0));
r1[4] = ((ul1 * r1[0]) >> 8) + ((ur1 * r1[1]) >> 8) + ((ll1 * r1[2]) >> 8) + ((lr1 * r1[3]) >> 8);
g1[4] = ((ul1 * g1[0]) >> 8) + ((ur1 * g1[1]) >> 8) + ((ll1 * g1[2]) >> 8) + ((lr1 * g1[3]) >> 8);
b1[4] = ((ul1 * b1[0]) >> 8) + ((ur1 * b1[1]) >> 8) + ((ll1 * b1[2]) >> 8) + ((lr1 * b1[3]) >> 8);
u0 += fsx0;
u1 += fsx1;
*dst_p++ =
(((((r0[4] - r1[4]) * ratio) >> 8) + r1[4]) << dstfmt->Rshift) |
(((((g0[4] - g1[4]) * ratio) >> 8) + g1[4]) << dstfmt->Gshift) |
(((((b0[4] - b1[4]) * ratio) >> 8) + b1[4]) << dstfmt->Bshift) |
dstopaque;
}
v0 += fsy0;
v1 += fsy1;
else
{
*dst_p++ = 0;
}
sx0 += fsx0;
sx1 += fsx1;
}
sx0 = sx1 = 0;
sy0 += fsy0;
sy1 += fsy1;
}
SDL_UnlockSurface(mipmap);
sc2/src/sc2code/libs/graphics/sdl/sdl_common.c
+1
View File
@@ -84,6 +84,7 @@ TFB_InitGraphics (int driver, int flags, int width, int height, int bpp)
// SDL_ShowCursor (SDL_DISABLE);
TFB_FlushPaletteCache ();
TFB_DrawCanvas_Initialize ();
return 0;
}
sc2/src/sc2code/libs/graphics/tfb_draw.h
+1
View File
@@ -100,5 +100,6 @@ TFB_Palette *TFB_DrawCanvas_ExtractPalette (TFB_Canvas canvas);
void TFB_DrawCanvas_SetPalette (TFB_Canvas target, TFB_Palette *palette);
int TFB_DrawCanvas_GetTransparentIndex (TFB_Canvas canvas);
void TFB_DrawCanvas_SetTransparentIndex (TFB_Canvas canvas, int i);
void TFB_DrawCanvas_Initialize (void);
#endif